/* $Id$ */
/*
* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see .
*/
/** @file widget.cpp Handling of the default/simple widgets. */
#include "stdafx.h"
#include "company_func.h"
#include "window_gui.h"
#include "viewport_func.h"
#include "zoom_func.h"
#include "strings_func.h"
#include "transparency.h"
#include "core/geometry_func.hpp"
#include "settings_type.h"
#include "table/sprites.h"
#include "table/strings.h"
static const char *UPARROW = "\xEE\x8A\xA0"; ///< String containing an upwards pointing arrow.
static const char *DOWNARROW = "\xEE\x8A\xAA"; ///< String containing a downwards pointing arrow.
/**
* Compute the vertical position of the draggable part of scrollbar
* @param sb Scrollbar list data
* @param top Top position of the scrollbar (top position of the up-button)
* @param bottom Bottom position of the scrollbar (bottom position of the down-button)
* @param horizontal Whether the scrollbar is horizontal or not
* @return A Point, with x containing the top coordinate of the draggable part, and
* y containing the bottom coordinate of the draggable part
*/
static Point HandleScrollbarHittest(const Scrollbar *sb, int top, int bottom, bool horizontal)
{
/* Base for reversion */
int rev_base = top + bottom;
top += 10; // top points to just below the up-button
bottom -= 9; // bottom points to top of the down-button
int height = (bottom - top);
int pos = sb->GetPosition();
int count = sb->GetCount();
int cap = sb->GetCapacity();
if (count != 0) top += height * pos / count;
if (cap > count) cap = count;
if (count != 0) bottom -= (count - pos - cap) * height / count;
Point pt;
if (horizontal && _dynlang.text_dir == TD_RTL) {
pt.x = rev_base - (bottom - 1);
pt.y = rev_base - top;
} else {
pt.x = top;
pt.y = bottom - 1;
}
return pt;
}
/**
* Compute new position of the scrollbar after a click and updates the window flags.
* @param w Window on which a scroll was performed.
* @param sb Scrollbar
* @param mi Minimum coordinate of the scroll bar.
* @param ma Maximum coordinate of the scroll bar.
* @param x The X coordinate of the mouse click.
* @param y The Y coordinate of the mouse click.
*/
static void ScrollbarClickPositioning(Window *w, NWidgetScrollbar *sb, int x, int y, int mi, int ma)
{
int pos;
bool rtl = false;
if (sb->type == NWID_HSCROLLBAR) {
pos = x;
rtl = _dynlang.text_dir == TD_RTL;
} else {
pos = y;
}
if (pos <= mi + 9) {
/* Pressing the upper button? */
SetBit(sb->disp_flags, NDB_SCROLLBAR_UP);
if (_scroller_click_timeout == 0) {
_scroller_click_timeout = 6;
sb->UpdatePosition(rtl ? 1 : -1);
}
_left_button_clicked = false;
} else if (pos >= ma - 10) {
/* Pressing the lower button? */
SetBit(sb->disp_flags, NDB_SCROLLBAR_DOWN);
if (_scroller_click_timeout == 0) {
_scroller_click_timeout = 6;
sb->UpdatePosition(rtl ? -1 : 1);
}
_left_button_clicked = false;
} else {
Point pt = HandleScrollbarHittest(sb, mi, ma, sb->type == NWID_HSCROLLBAR);
if (pos < pt.x) {
sb->UpdatePosition(rtl ? sb->GetCapacity() : -sb->GetCapacity());
} else if (pos > pt.y) {
sb->UpdatePosition(rtl ? -sb->GetCapacity() : sb->GetCapacity());
} else {
_scrollbar_start_pos = pt.x - mi - 9;
_scrollbar_size = ma - mi - 23;
w->scrolling_scrollbar = sb->index;
_cursorpos_drag_start = _cursor.pos;
}
}
w->SetDirty();
}
/**
* Special handling for the scrollbar widget type.
* Handles the special scrolling buttons and other scrolling.
* @param w Window on which a scroll was performed.
* @param nw Pointer to the scrollbar widget.
* @param x The X coordinate of the mouse click.
* @param y The Y coordinate of the mouse click.
*/
void ScrollbarClickHandler(Window *w, NWidgetCore *nw, int x, int y)
{
int mi, ma;
if (nw->type == NWID_HSCROLLBAR) {
mi = nw->pos_x;
ma = nw->pos_x + nw->current_x;
} else {
mi = nw->pos_y;
ma = nw->pos_y + nw->current_y;
}
ScrollbarClickPositioning(w, dynamic_cast(nw), x, y, mi, ma);
}
/**
* Returns the index for the widget located at the given position
* relative to the window. It includes all widget-corner pixels as well.
* @param *w Window to look inside
* @param x The Window client X coordinate
* @param y The Window client y coordinate
* @return A widget index, or -1 if no widget was found.
*/
int GetWidgetFromPos(const Window *w, int x, int y)
{
NWidgetCore *nw = w->nested_root->GetWidgetFromPos(x, y);
return (nw != NULL) ? nw->index : -1;
}
/**
* Draw frame rectangle.
* @param left Left edge of the frame
* @param top Top edge of the frame
* @param right Right edge of the frame
* @param bottom Bottom edge of the frame
* @param colour Colour table to use. @see _colour_gradient
* @param flags Flags controlling how to draw the frame. @see FrameFlags
*/
void DrawFrameRect(int left, int top, int right, int bottom, Colours colour, FrameFlags flags)
{
uint dark = _colour_gradient[colour][3];
uint medium_dark = _colour_gradient[colour][5];
uint medium_light = _colour_gradient[colour][6];
uint light = _colour_gradient[colour][7];
if (flags & FR_TRANSPARENT) {
GfxFillRect(left, top, right, bottom, PALETTE_TO_TRANSPARENT, FILLRECT_RECOLOUR);
} else {
uint interior;
if (flags & FR_LOWERED) {
GfxFillRect(left, top, left, bottom, dark);
GfxFillRect(left + 1, top, right, top, dark);
GfxFillRect(right, top + 1, right, bottom - 1, light);
GfxFillRect(left + 1, bottom, right, bottom, light);
interior = (flags & FR_DARKENED ? medium_dark : medium_light);
} else {
GfxFillRect(left, top, left, bottom - 1, light);
GfxFillRect(left + 1, top, right - 1, top, light);
GfxFillRect(right, top, right, bottom - 1, dark);
GfxFillRect(left, bottom, right, bottom, dark);
interior = medium_dark;
}
if (!(flags & FR_BORDERONLY)) {
GfxFillRect(left + 1, top + 1, right - 1, bottom - 1, interior);
}
}
}
/**
* Draw an image button.
* @param r Rectangle of the button.
* @param type Widget type (#WWT_IMGBTN or #WWT_IMGBTN_2).
* @param colour Colour of the button.
* @param clicked Button is lowered.
* @param img Sprite to draw.
*/
static inline void DrawImageButtons(const Rect &r, WidgetType type, Colours colour, bool clicked, SpriteID img)
{
assert(img != 0);
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
if ((type & WWT_MASK) == WWT_IMGBTN_2 && clicked) img++; // Show different image when clicked for #WWT_IMGBTN_2.
DrawSprite(img, PAL_NONE, r.left + WD_IMGBTN_LEFT + clicked, r.top + WD_IMGBTN_TOP + clicked);
}
/**
* Draw the label-part of a widget.
* @param r Rectangle of the label background.
* @param type Widget type (#WWT_TEXTBTN, #WWT_TEXTBTN_2, or #WWT_LABEL).
* @param clicked Label is rendered lowered.
* @param str Text to draw.
*/
static inline void DrawLabel(const Rect &r, WidgetType type, bool clicked, StringID str)
{
if (str == STR_NULL) return;
if ((type & WWT_MASK) == WWT_TEXTBTN_2 && clicked) str++;
Dimension d = GetStringBoundingBox(str);
int offset = max(0, ((int)(r.bottom - r.top + 1) - (int)d.height) / 2); // Offset for rendering the text vertically centered
DrawString(r.left + clicked, r.right + clicked, r.top + offset + clicked, str, TC_FROMSTRING, SA_HOR_CENTER);
}
/**
* Draw text.
* @param r Rectangle of the background.
* @param colour Colour of the text.
* @param str Text to draw.
*/
static inline void DrawText(const Rect &r, TextColour colour, StringID str)
{
Dimension d = GetStringBoundingBox(str);
int offset = max(0, ((int)(r.bottom - r.top + 1) - (int)d.height) / 2); // Offset for rendering the text vertically centered
if (str != STR_NULL) DrawString(r.left, r.right, r.top + offset, str, colour);
}
/**
* Draw an inset widget.
* @param r Rectangle of the background.
* @param colour Colour of the inset.
* @param str Text to draw.
*/
static inline void DrawInset(const Rect &r, Colours colour, StringID str)
{
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, FR_LOWERED | FR_DARKENED);
if (str != STR_NULL) DrawString(r.left + WD_INSET_LEFT, r.right - WD_INSET_RIGHT, r.top + WD_INSET_TOP, str);
}
/**
* Draw a matrix widget.
* @param r Rectangle of the matrix background.
* @param colour Colour of the background.
* @param clicked Matrix is rendered lowered.
* @param data Data of the widget, number of rows and columns of the widget.
*/
static inline void DrawMatrix(const Rect &r, Colours colour, bool clicked, uint16 data)
{
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
int num_columns = GB(data, MAT_COL_START, MAT_COL_BITS); // Lower 8 bits of the widget data: Number of columns in the matrix.
int column_width = (r.right - r.left + 1) / num_columns; // Width of a single column in the matrix.
int num_rows = GB(data, MAT_ROW_START, MAT_ROW_BITS); // Upper 8 bits of the widget data: Number of rows in the matrix.
int row_height = (r.bottom - r.top + 1) / num_rows; // Height of a single row in the matrix.
int col = _colour_gradient[colour & 0xF][6];
int x = r.left;
for (int ctr = num_columns; ctr > 1; ctr--) {
x += column_width;
GfxFillRect(x, r.top + 1, x, r.bottom - 1, col);
}
x = r.top;
for (int ctr = num_rows; ctr > 1; ctr--) {
x += row_height;
GfxFillRect(r.left + 1, x, r.right - 1, x, col);
}
col = _colour_gradient[colour & 0xF][4];
x = r.left - 1;
for (int ctr = num_columns; ctr > 1; ctr--) {
x += column_width;
GfxFillRect(x, r.top + 1, x, r.bottom - 1, col);
}
x = r.top - 1;
for (int ctr = num_rows; ctr > 1; ctr--) {
x += row_height;
GfxFillRect(r.left + 1, x, r.right - 1, x, col);
}
}
/**
* Draw a vertical scrollbar.
* @param r Rectangle of the scrollbar widget.
* @param colour Colour of the scrollbar widget.
* @param up_clicked Up-arrow is clicked.
* @param bar_dragged Bar is dragged.
* @param down_clicked Down-arrow is clicked.
* @param scrollbar Scrollbar size, offset, and capacity information.
*/
static inline void DrawVerticalScrollbar(const Rect &r, Colours colour, bool up_clicked, bool bar_dragged, bool down_clicked, const Scrollbar *scrollbar)
{
/* draw up/down buttons */
DrawFrameRect(r.left, r.top, r.right, r.top + 9, colour, (up_clicked) ? FR_LOWERED : FR_NONE);
DrawString(r.left + up_clicked, r.right + up_clicked, r.top + up_clicked, UPARROW, TC_BLACK, SA_HOR_CENTER);
DrawFrameRect(r.left, r.bottom - 9, r.right, r.bottom, colour, (down_clicked) ? FR_LOWERED : FR_NONE);
DrawString(r.left + down_clicked, r.right + down_clicked, r.bottom - 9 + down_clicked, DOWNARROW, TC_BLACK, SA_HOR_CENTER);
int c1 = _colour_gradient[colour & 0xF][3];
int c2 = _colour_gradient[colour & 0xF][7];
/* draw "shaded" background */
GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c2);
GfxFillRect(r.left, r.top + 10, r.right, r.bottom - 10, c1, FILLRECT_CHECKER);
/* draw shaded lines */
GfxFillRect(r.left + 2, r.top + 10, r.left + 2, r.bottom - 10, c1);
GfxFillRect(r.left + 3, r.top + 10, r.left + 3, r.bottom - 10, c2);
GfxFillRect(r.left + 7, r.top + 10, r.left + 7, r.bottom - 10, c1);
GfxFillRect(r.left + 8, r.top + 10, r.left + 8, r.bottom - 10, c2);
Point pt = HandleScrollbarHittest(scrollbar, r.top, r.bottom, false);
DrawFrameRect(r.left, pt.x, r.right, pt.y, colour, bar_dragged ? FR_LOWERED : FR_NONE);
}
/**
* Draw a horizontal scrollbar.
* @param r Rectangle of the scrollbar widget.
* @param colour Colour of the scrollbar widget.
* @param left_clicked Left-arrow is clicked.
* @param bar_dragged Bar is dragged.
* @param right_clicked Right-arrow is clicked.
* @param scrollbar Scrollbar size, offset, and capacity information.
*/
static inline void DrawHorizontalScrollbar(const Rect &r, Colours colour, bool left_clicked, bool bar_dragged, bool right_clicked, const Scrollbar *scrollbar)
{
DrawFrameRect(r.left, r.top, r.left + 9, r.bottom, colour, left_clicked ? FR_LOWERED : FR_NONE);
DrawSprite(SPR_ARROW_LEFT, PAL_NONE, r.left + 1 + left_clicked, r.top + 1 + left_clicked);
DrawFrameRect(r.right - 9, r.top, r.right, r.bottom, colour, right_clicked ? FR_LOWERED : FR_NONE);
DrawSprite(SPR_ARROW_RIGHT, PAL_NONE, r.right - 8 + right_clicked, r.top + 1 + right_clicked);
int c1 = _colour_gradient[colour & 0xF][3];
int c2 = _colour_gradient[colour & 0xF][7];
/* draw "shaded" background */
GfxFillRect(r.left + 10, r.top, r.right - 10, r.bottom, c2);
GfxFillRect(r.left + 10, r.top, r.right - 10, r.bottom, c1, FILLRECT_CHECKER);
/* draw shaded lines */
GfxFillRect(r.left + 10, r.top + 2, r.right - 10, r.top + 2, c1);
GfxFillRect(r.left + 10, r.top + 3, r.right - 10, r.top + 3, c2);
GfxFillRect(r.left + 10, r.top + 7, r.right - 10, r.top + 7, c1);
GfxFillRect(r.left + 10, r.top + 8, r.right - 10, r.top + 8, c2);
/* draw actual scrollbar */
Point pt = HandleScrollbarHittest(scrollbar, r.left, r.right, true);
DrawFrameRect(pt.x, r.top, pt.y, r.bottom, colour, bar_dragged ? FR_LOWERED : FR_NONE);
}
/**
* Draw a frame widget.
* @param r Rectangle of the frame.
* @param colour Colour of the frame.
* @param str Text of the frame.
*/
static inline void DrawFrame(const Rect &r, Colours colour, StringID str)
{
int x2 = r.left; // by default the left side is the left side of the widget
if (str != STR_NULL) x2 = DrawString(r.left + WD_FRAMETEXT_LEFT, r.right - WD_FRAMETEXT_RIGHT, r.top, str);
int c1 = _colour_gradient[colour][3];
int c2 = _colour_gradient[colour][7];
/* If the frame has text, adjust the top bar to fit half-way through */
int dy1 = 4;
if (str != STR_NULL) dy1 = FONT_HEIGHT_NORMAL / 2 - 1;
int dy2 = dy1 + 1;
if (_dynlang.text_dir == TD_LTR) {
/* Line from upper left corner to start of text */
GfxFillRect(r.left, r.top + dy1, r.left + 4, r.top + dy1, c1);
GfxFillRect(r.left + 1, r.top + dy2, r.left + 4, r.top + dy2, c2);
/* Line from end of text to upper right corner */
GfxFillRect(x2, r.top + dy1, r.right - 1, r.top + dy1, c1);
GfxFillRect(x2, r.top + dy2, r.right - 2, r.top + dy2, c2);
} else {
/* Line from upper left corner to start of text */
GfxFillRect(r.left, r.top + dy1, x2 - 2, r.top + dy1, c1);
GfxFillRect(r.left + 1, r.top + dy2, x2 - 2, r.top + dy2, c2);
/* Line from end of text to upper right corner */
GfxFillRect(r.right - 5, r.top + dy1, r.right - 1, r.top + dy1, c1);
GfxFillRect(r.right - 5, r.top + dy2, r.right - 2, r.top + dy2, c2);
}
/* Line from upper left corner to bottom left corner */
GfxFillRect(r.left, r.top + dy2, r.left, r.bottom - 1, c1);
GfxFillRect(r.left + 1, r.top + dy2 + 1, r.left + 1, r.bottom - 2, c2);
/* Line from upper right corner to bottom right corner */
GfxFillRect(r.right - 1, r.top + dy2, r.right - 1, r.bottom - 2, c1);
GfxFillRect(r.right, r.top + dy1, r.right, r.bottom - 1, c2);
GfxFillRect(r.left + 1, r.bottom - 1, r.right - 1, r.bottom - 1, c1);
GfxFillRect(r.left, r.bottom, r.right, r.bottom, c2);
}
/**
* Draw a shade box.
* @param r Rectangle of the box.
* @param colour Colour of the shade box.
* @param clicked Box is lowered.
*/
static inline void DrawShadeBox(const Rect &r, Colours colour, bool clicked)
{
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
DrawSprite((clicked) ? SPR_WINDOW_SHADE : SPR_WINDOW_UNSHADE, PAL_NONE, r.left + WD_SHADEBOX_LEFT + clicked, r.top + WD_SHADEBOX_TOP + clicked);
}
/**
* Draw a sticky box.
* @param r Rectangle of the box.
* @param colour Colour of the sticky box.
* @param clicked Box is lowered.
*/
static inline void DrawStickyBox(const Rect &r, Colours colour, bool clicked)
{
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
DrawSprite((clicked) ? SPR_PIN_UP : SPR_PIN_DOWN, PAL_NONE, r.left + WD_STICKYBOX_LEFT + clicked, r.top + WD_STICKYBOX_TOP + clicked);
}
/**
* Draw a NewGRF debug box.
* @param r Rectangle of the box.
* @param colour Colour of the debug box.
* @param clicked Box is lowered.
*/
static inline void DrawDebugBox(const Rect &r, Colours colour, bool clicked)
{
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
DrawSprite(SPR_WINDOW_DEBUG, PAL_NONE, r.left + WD_DEBUGBOX_LEFT + clicked, r.top + WD_DEBUGBOX_TOP + clicked);
}
/**
* Draw a resize box.
* @param r Rectangle of the box.
* @param colour Colour of the resize box.
* @param at_left Resize box is at left-side of the window,
* @param clicked Box is lowered.
*/
static inline void DrawResizeBox(const Rect &r, Colours colour, bool at_left, bool clicked)
{
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, (clicked) ? FR_LOWERED : FR_NONE);
if (at_left) {
DrawSprite(SPR_WINDOW_RESIZE_LEFT, PAL_NONE, r.left + WD_RESIZEBOX_RIGHT + clicked, r.top + WD_RESIZEBOX_TOP + clicked);
} else {
DrawSprite(SPR_WINDOW_RESIZE_RIGHT, PAL_NONE, r.left + WD_RESIZEBOX_LEFT + clicked, r.top + WD_RESIZEBOX_TOP + clicked);
}
}
/**
* Draw a close box.
* @param r Rectangle of the box.
* @param colour Colour of the close box.
* @param str Cross to draw (#STR_BLACK_CROSS or #STR_SILVER_CROSS).
*/
static inline void DrawCloseBox(const Rect &r, Colours colour, StringID str)
{
assert(str == STR_BLACK_CROSS || str == STR_SILVER_CROSS); // black or silver cross
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, FR_NONE);
DrawString(r.left + WD_CLOSEBOX_LEFT, r.right - WD_CLOSEBOX_RIGHT, r.top + WD_CLOSEBOX_TOP, str, TC_FROMSTRING, SA_HOR_CENTER);
}
/**
* Draw a caption bar.
* @param r Rectangle of the bar.
* @param colour Colour of the window.
* @param owner 'Owner' of the window.
* @param str Text to draw in the bar.
*/
void DrawCaption(const Rect &r, Colours colour, Owner owner, StringID str)
{
DrawFrameRect(r.left, r.top, r.right, r.bottom, colour, FR_BORDERONLY);
DrawFrameRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, colour, (owner == INVALID_OWNER) ? FR_LOWERED | FR_DARKENED : FR_LOWERED | FR_DARKENED | FR_BORDERONLY);
if (owner != INVALID_OWNER) {
GfxFillRect(r.left + 2, r.top + 2, r.right - 2, r.bottom - 2, _colour_gradient[_company_colours[owner]][4]);
}
if (str != STR_NULL) DrawString(r.left + WD_CAPTIONTEXT_LEFT, r.right - WD_CAPTIONTEXT_RIGHT, r.top + WD_CAPTIONTEXT_TOP, str, TC_FROMSTRING, SA_HOR_CENTER);
}
/**
* Draw a button with a dropdown (#WWT_DROPDOWN and #NWID_BUTTON_DROPDOWN).
* @param r Rectangle containing the widget.
* @param colour Background colour of the widget.
* @param clicked_button The button-part is lowered.
* @param clicked_dropdown The drop-down part is lowered.
* @param str Text of the button.
*
* @note Magic constants are also used in #NWidgetLeaf::ButtonHit.
*/
static inline void DrawButtonDropdown(const Rect &r, Colours colour, bool clicked_button, bool clicked_dropdown, StringID str)
{
if (_dynlang.text_dir == TD_LTR) {
DrawFrameRect(r.left, r.top, r.right - 12, r.bottom, colour, clicked_button ? FR_LOWERED : FR_NONE);
DrawFrameRect(r.right - 11, r.top, r.right, r.bottom, colour, clicked_dropdown ? FR_LOWERED : FR_NONE);
DrawString(r.right - (clicked_dropdown ? 10 : 11), r.right, r.top + (clicked_dropdown ? 2 : 1), DOWNARROW, TC_BLACK, SA_HOR_CENTER);
if (str != STR_NULL) DrawString(r.left + WD_DROPDOWNTEXT_LEFT + clicked_button, r.right - WD_DROPDOWNTEXT_RIGHT + clicked_button, r.top + WD_DROPDOWNTEXT_TOP + clicked_button, str, TC_BLACK);
} else {
DrawFrameRect(r.left + 12, r.top, r.right, r.bottom, colour, clicked_button ? FR_LOWERED : FR_NONE);
DrawFrameRect(r.left, r.top, r.left + 11, r.bottom, colour, clicked_dropdown ? FR_LOWERED : FR_NONE);
DrawString(r.left + clicked_dropdown, r.left + 11, r.top + (clicked_dropdown ? 2 : 1), DOWNARROW, TC_BLACK, SA_HOR_CENTER);
if (str != STR_NULL) DrawString(r.left + WD_DROPDOWNTEXT_RIGHT + clicked_button, r.right - WD_DROPDOWNTEXT_LEFT + clicked_button, r.top + WD_DROPDOWNTEXT_TOP + clicked_button, str, TC_BLACK);
}
}
/**
* Draw a dropdown #WWT_DROPDOWN widget.
* @param r Rectangle containing the widget.
* @param colour Background colour of the widget.
* @param clicked The widget is lowered.
* @param str Text of the button.
*/
static inline void DrawDropdown(const Rect &r, Colours colour, bool clicked, StringID str)
{
DrawButtonDropdown(r, colour, false, clicked, str);
}
/**
* Paint all widgets of a window.
*/
void Window::DrawWidgets() const
{
this->nested_root->Draw(this);
if (this->flags4 & WF_WHITE_BORDER_MASK) {
DrawFrameRect(0, 0, this->width - 1, this->height - 1, COLOUR_WHITE, FR_BORDERONLY);
}
}
/**
* Draw a sort button's up or down arrow symbol.
* @param widget Sort button widget
* @param state State of sort button
*/
void Window::DrawSortButtonState(int widget, SortButtonState state) const
{
if (state == SBS_OFF) return;
assert(this->nested_array != NULL);
const NWidgetBase *nwid = this->GetWidget(widget);
int offset = this->IsWidgetLowered(widget) ? 1 : 0;
int base = offset + nwid->pos_x + (_dynlang.text_dir == TD_LTR ? nwid->current_x - WD_SORTBUTTON_ARROW_WIDTH : 0);
int top = nwid->pos_y;
DrawString(base, base + WD_SORTBUTTON_ARROW_WIDTH, top + 1 + offset, state == SBS_DOWN ? DOWNARROW : UPARROW, TC_BLACK, SA_HOR_CENTER);
}
/**
* @defgroup NestedWidgets Hierarchical widgets
* Hierarchical widgets, also known as nested widgets, are widgets stored in a tree. At the leafs of the tree are (mostly) the 'real' widgets
* visible to the user. At higher levels, widgets get organized in container widgets, until all widgets of the window are merged.
*
* \section nestedwidgetkinds Hierarchical widget kinds
* A leaf widget is one of
*
* - #NWidgetLeaf for widgets visible for the user, or
*
- #NWidgetSpacer for creating (flexible) empty space between widgets.
*
* The purpose of a leaf widget is to provide interaction with the user by displaying settings, and/or allowing changing the settings.
*
* A container widget is one of
*
* - #NWidgetHorizontal for organizing child widgets in a (horizontal) row. The row switches order depending on the language setting (thus supporting
* right-to-left languages),
*
- #NWidgetHorizontalLTR for organizing child widgets in a (horizontal) row, always in the same order. All childs below this container will also
* never swap order.
*
- #NWidgetVertical for organizing child widgets underneath each other.
*
- #NWidgetBackground for adding a background behind its child widget.
*
- #NWidgetStacked for stacking child widgets on top of each other.
*
* The purpose of a container widget is to structure its leafs and sub-containers to allow proper resizing.
*
* \section nestedwidgetscomputations Hierarchical widget computations
* The first 'computation' is the creation of the nested widgets tree by calling the constructors of the widgets listed above and calling \c Add() for every child,
* or by means of specifying the tree as a collection of nested widgets parts and instantiating the tree from the array.
*
* After the creation step,
* - The leafs have their own minimal size (\e min_x, \e min_y), filling (\e fill_x, \e fill_y), and resize steps (\e resize_x, \e resize_y).
* - Containers only know what their children are, \e fill_x, \e fill_y, \e resize_x, and \e resize_y are not initialized.
*
* Computations in the nested widgets take place as follows:
*
* - A bottom-up sweep by recursively calling NWidgetBase::SetupSmallestSize() to initialize the smallest size (\e smallest_x, \e smallest_y) and
* to propagate filling and resize steps upwards to the root of the tree.
*
- A top-down sweep by recursively calling NWidgetBase::AssignSizePosition() with #ST_SMALLEST to make the smallest sizes consistent over
* the entire tree, and to assign the top-left (\e pos_x, \e pos_y) position of each widget in the tree. This step uses \e fill_x and \e fill_y at each
* node in the tree to decide how to fill each widget towards consistent sizes. Also the current size (\e current_x and \e current_y) is set.
*
- After initializing the smallest size in the widget tree with #ST_SMALLEST, the tree can be resized (the current size modified) by calling
* NWidgetBase::AssignSizePosition() at the root with #ST_RESIZE and the new size of the window. For proper functioning, the new size should be the smallest
* size + a whole number of resize steps in both directions (ie you can only resize in steps of length resize_{x,y} from smallest_{x,y}).
*
* After the second step, the current size of the widgets are set to the smallest size.
*
* To resize, perform the last step with the new window size. This can be done as often as desired.
* When the smallest size of at least one widget changes, the whole procedure has to be redone from the start.
*
* @see NestedWidgetParts
*/
/**
* Base class constructor.
* @param tp Nested widget type.
*/
NWidgetBase::NWidgetBase(WidgetType tp) : ZeroedMemoryAllocator()
{
this->type = tp;
}
/* ~NWidgetContainer() takes care of #next and #prev data members. */
/**
* @fn void NWidgetBase::SetupSmallestSize(Window *w, bool init_array)
* Compute smallest size needed by the widget.
*
* The smallest size of a widget is the smallest size that a widget needs to
* display itself properly. In addition, filling and resizing of the widget are computed.
* The function calls #Window::UpdateWidgetSize for each leaf widget and
* background widget without child with a non-negative index.
*
* @param w Window owning the widget.
* @param init_array Initialize the \c w->nested_array.
*
* @note After the computation, the results can be queried by accessing the #smallest_x and #smallest_y data members of the widget.
*/
/**
* @fn void NWidgetBase::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
* Assign size and position to the widget.
* @param sizing Type of resizing to perform.
* @param x Horizontal offset of the widget relative to the left edge of the window.
* @param y Vertical offset of the widget relative to the top edge of the window.
* @param given_width Width allocated to the widget.
* @param given_height Height allocated to the widget.
* @param rtl Adapt for right-to-left languages (position contents of horizontal containers backwards).
*
* Afterwards, \e pos_x and \e pos_y contain the top-left position of the widget, \e smallest_x and \e smallest_y contain
* the smallest size such that all widgets of the window are consistent, and \e current_x and \e current_y contain the current size.
*/
/**
* @fn void FillNestedArray(NWidgetBase **array, uint length)
* Fill the Window::nested_array array with pointers to nested widgets in the tree.
* @param array Base pointer of the array.
* @param length Length of the array.
*/
/**
* @fn void NWidgetBase::Draw(const Window *w)
* Draw the widgets of the tree.
* The function calls #Window::DrawWidget for each widget with a non-negative index, after the widget itself is painted.
* @param w Window that owns the tree.
*/
/**
* Mark the widget as 'dirty' (in need of repaint).
* @param w Window owning the widget.
*/
void NWidgetBase::SetDirty(const Window *w) const
{
int abs_left = w->left + this->pos_x;
int abs_top = w->top + this->pos_y;
SetDirtyBlocks(abs_left, abs_top, abs_left + this->current_x, abs_top + this->current_y);
}
/**
* @fn NWidgetCore *NWidgetBase::GetWidgetFromPos(int x, int y)
* Retrieve a widget by its position.
* @param x Horizontal position relative to the left edge of the window.
* @param y Vertical position relative to the top edge of the window.
* @return Returns the deepest nested widget that covers the given position, or \c NULL if no widget can be found.
*/
/**
* Retrieve a widget by its type.
* @param tp Widget type to search for.
* @return Returns the first widget of the specified type, or \c NULL if no widget can be found.
*/
NWidgetBase *NWidgetBase::GetWidgetOfType(WidgetType tp)
{
return (this->type == tp) ? this : NULL;
}
/**
* Constructor for resizable nested widgets.
* @param tp Nested widget type.
* @param fill_x Horizontal fill step size, \c 0 means no filling is allowed.
* @param fill_y Vertical fill step size, \c 0 means no filling is allowed.
*/
NWidgetResizeBase::NWidgetResizeBase(WidgetType tp, uint fill_x, uint fill_y) : NWidgetBase(tp)
{
this->fill_x = fill_x;
this->fill_y = fill_y;
}
/**
* Set minimal size of the widget.
* @param min_x Horizontal minimal size of the widget.
* @param min_y Vertical minimal size of the widget.
*/
void NWidgetResizeBase::SetMinimalSize(uint min_x, uint min_y)
{
this->min_x = min_x;
this->min_y = min_y;
}
/**
* Set minimal text lines for the widget.
* @param min_lines Number of text lines of the widget.
* @param spacing Extra spacing (eg WD_FRAMERECT_TOP + _BOTTOM) of the widget.
* @param size Font size of text.
*/
void NWidgetResizeBase::SetMinimalTextLines(uint8 min_lines, uint8 spacing, FontSize size)
{
this->min_y = min_lines * GetCharacterHeight(size) + spacing;
}
/**
* Set the filling of the widget from initial size.
* @param fill_x Horizontal fill step size, \c 0 means no filling is allowed.
* @param fill_y Vertical fill step size, \c 0 means no filling is allowed.
*/
void NWidgetResizeBase::SetFill(uint fill_x, uint fill_y)
{
this->fill_x = fill_x;
this->fill_y = fill_y;
}
/**
* Set resize step of the widget.
* @param resize_x Resize step in horizontal direction, value \c 0 means no resize, otherwise the step size in pixels.
* @param resize_y Resize step in vertical direction, value \c 0 means no resize, otherwise the step size in pixels.
*/
void NWidgetResizeBase::SetResize(uint resize_x, uint resize_y)
{
this->resize_x = resize_x;
this->resize_y = resize_y;
}
void NWidgetResizeBase::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
{
this->StoreSizePosition(sizing, x, y, given_width, given_height);
}
/**
* Initialization of a 'real' widget.
* @param tp Type of the widget.
* @param colour Colour of the widget.
* @param fill_x Default horizontal filling.
* @param fill_y Default vertical filling.
* @param widget_data Data component of the widget. @see Widget::data
* @param tool_tip Tool tip of the widget. @see Widget::tootips
*/
NWidgetCore::NWidgetCore(WidgetType tp, Colours colour, uint fill_x, uint fill_y, uint16 widget_data, StringID tool_tip) : NWidgetResizeBase(tp, fill_x, fill_y)
{
this->colour = colour;
this->index = -1;
this->widget_data = widget_data;
this->tool_tip = tool_tip;
this->scrollbar_index = -1;
}
/**
* Set index of the nested widget in the widget array.
* @param index Index to use.
*/
void NWidgetCore::SetIndex(int index)
{
assert(index >= 0);
this->index = index;
}
/**
* Set data and tool tip of the nested widget.
* @param widget_data Data to use.
* @param tool_tip Tool tip string to use.
*/
void NWidgetCore::SetDataTip(uint16 widget_data, StringID tool_tip)
{
this->widget_data = widget_data;
this->tool_tip = tool_tip;
}
void NWidgetCore::FillNestedArray(NWidgetBase **array, uint length)
{
if (this->index >= 0 && (uint)(this->index) < length) array[this->index] = this;
}
NWidgetCore *NWidgetCore::GetWidgetFromPos(int x, int y)
{
return (IsInsideBS(x, this->pos_x, this->current_x) && IsInsideBS(y, this->pos_y, this->current_y)) ? this : NULL;
}
/**
* Constructor container baseclass.
* @param tp Type of the container.
*/
NWidgetContainer::NWidgetContainer(WidgetType tp) : NWidgetBase(tp)
{
this->head = NULL;
this->tail = NULL;
}
NWidgetContainer::~NWidgetContainer()
{
while (this->head != NULL) {
NWidgetBase *wid = this->head->next;
delete this->head;
this->head = wid;
}
this->tail = NULL;
}
NWidgetBase *NWidgetContainer::GetWidgetOfType(WidgetType tp)
{
if (this->type == tp) return this;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
NWidgetBase *nwid = child_wid->GetWidgetOfType(tp);
if (nwid != NULL) return nwid;
}
return NULL;
}
/**
* Append widget \a wid to container.
* @param wid Widget to append.
*/
void NWidgetContainer::Add(NWidgetBase *wid)
{
assert(wid->next == NULL && wid->prev == NULL);
if (this->head == NULL) {
this->head = wid;
this->tail = wid;
} else {
assert(this->tail != NULL);
assert(this->tail->next == NULL);
this->tail->next = wid;
wid->prev = this->tail;
this->tail = wid;
}
}
void NWidgetContainer::FillNestedArray(NWidgetBase **array, uint length)
{
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
child_wid->FillNestedArray(array, length);
}
}
/**
* Widgets stacked on top of each other.
*/
NWidgetStacked::NWidgetStacked() : NWidgetContainer(NWID_SELECTION)
{
this->index = -1;
}
void NWidgetStacked::SetIndex(int index)
{
this->index = index;
}
void NWidgetStacked::SetupSmallestSize(Window *w, bool init_array)
{
if (this->index >= 0 && init_array) { // Fill w->nested_array[]
assert(w->nested_array_size > (uint)this->index);
w->nested_array[this->index] = this;
}
/* Zero size plane selected */
if (this->shown_plane >= SZSP_BEGIN) {
Dimension size = {0, 0};
Dimension padding = {0, 0};
Dimension fill = {(this->shown_plane == SZSP_HORIZONTAL), (this->shown_plane == SZSP_VERTICAL)};
Dimension resize = {(this->shown_plane == SZSP_HORIZONTAL), (this->shown_plane == SZSP_VERTICAL)};
/* Here we're primarily interested in the value of resize */
if (this->index >= 0) w->UpdateWidgetSize(this->index, &size, padding, &fill, &resize);
this->smallest_x = size.width;
this->smallest_y = size.height;
this->fill_x = fill.width;
this->fill_y = fill.height;
this->resize_x = resize.width;
this->resize_y = resize.height;
return;
}
/* First sweep, recurse down and compute minimal size and filling. */
this->smallest_x = 0;
this->smallest_y = 0;
this->fill_x = (this->head != NULL) ? 1 : 0;
this->fill_y = (this->head != NULL) ? 1 : 0;
this->resize_x = (this->head != NULL) ? 1 : 0;
this->resize_y = (this->head != NULL) ? 1 : 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
child_wid->SetupSmallestSize(w, init_array);
this->smallest_x = max(this->smallest_x, child_wid->smallest_x + child_wid->padding_left + child_wid->padding_right);
this->smallest_y = max(this->smallest_y, child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom);
this->fill_x = LeastCommonMultiple(this->fill_x, child_wid->fill_x);
this->fill_y = LeastCommonMultiple(this->fill_y, child_wid->fill_y);
this->resize_x = LeastCommonMultiple(this->resize_x, child_wid->resize_x);
this->resize_y = LeastCommonMultiple(this->resize_y, child_wid->resize_y);
}
}
void NWidgetStacked::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
{
assert(given_width >= this->smallest_x && given_height >= this->smallest_y);
this->StoreSizePosition(sizing, x, y, given_width, given_height);
if (this->shown_plane >= SZSP_BEGIN) return;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
uint hor_step = (sizing == ST_SMALLEST) ? 1 : child_wid->GetHorizontalStepSize(sizing);
uint child_width = ComputeMaxSize(child_wid->smallest_x, given_width - child_wid->padding_left - child_wid->padding_right, hor_step);
uint child_pos_x = (rtl ? child_wid->padding_right : child_wid->padding_left);
uint vert_step = (sizing == ST_SMALLEST) ? 1 : child_wid->GetVerticalStepSize(sizing);
uint child_height = ComputeMaxSize(child_wid->smallest_y, given_height - child_wid->padding_top - child_wid->padding_bottom, vert_step);
uint child_pos_y = child_wid->padding_top;
child_wid->AssignSizePosition(sizing, x + child_pos_x, y + child_pos_y, child_width, child_height, rtl);
}
}
void NWidgetStacked::FillNestedArray(NWidgetBase **array, uint length)
{
if (this->index >= 0 && (uint)(this->index) < length) array[this->index] = this;
NWidgetContainer::FillNestedArray(array, length);
}
void NWidgetStacked::Draw(const Window *w)
{
if (this->shown_plane >= SZSP_BEGIN) return;
int plane = 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; plane++, child_wid = child_wid->next) {
if (plane == this->shown_plane) {
child_wid->Draw(w);
return;
}
}
NOT_REACHED();
}
NWidgetCore *NWidgetStacked::GetWidgetFromPos(int x, int y)
{
if (this->shown_plane >= SZSP_BEGIN) return NULL;
if (!IsInsideBS(x, this->pos_x, this->current_x) || !IsInsideBS(y, this->pos_y, this->current_y)) return NULL;
int plane = 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; plane++, child_wid = child_wid->next) {
if (plane == this->shown_plane) {
return child_wid->GetWidgetFromPos(x, y);
}
}
return NULL;
}
/**
* Select which plane to show (for #NWID_SELECTION only).
* @param plane Plane number to display.
*/
void NWidgetStacked::SetDisplayedPlane(int plane)
{
this->shown_plane = plane;
}
NWidgetPIPContainer::NWidgetPIPContainer(WidgetType tp, NWidContainerFlags flags) : NWidgetContainer(tp)
{
this->flags = flags;
}
/**
* Set additional pre/inter/post space for the container.
*
* @param pip_pre Additional space in front of the first child widget (above
* for the vertical container, at the left for the horizontal container).
* @param pip_inter Additional space between two child widgets.
* @param pip_post Additional space after the last child widget (below for the
* vertical container, at the right for the horizontal container).
*/
void NWidgetPIPContainer::SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post)
{
this->pip_pre = pip_pre;
this->pip_inter = pip_inter;
this->pip_post = pip_post;
}
void NWidgetPIPContainer::Draw(const Window *w)
{
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
child_wid->Draw(w);
}
}
NWidgetCore *NWidgetPIPContainer::GetWidgetFromPos(int x, int y)
{
if (!IsInsideBS(x, this->pos_x, this->current_x) || !IsInsideBS(y, this->pos_y, this->current_y)) return NULL;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
NWidgetCore *nwid = child_wid->GetWidgetFromPos(x, y);
if (nwid != NULL) return nwid;
}
return NULL;
}
/** Horizontal container widget. */
NWidgetHorizontal::NWidgetHorizontal(NWidContainerFlags flags) : NWidgetPIPContainer(NWID_HORIZONTAL, flags)
{
}
void NWidgetHorizontal::SetupSmallestSize(Window *w, bool init_array)
{
this->smallest_x = 0; // Sum of minimal size of all childs.
this->smallest_y = 0; // Biggest child.
this->fill_x = 0; // smallest non-zero child widget fill step.
this->fill_y = 1; // smallest common child fill step.
this->resize_x = 0; // smallest non-zero child widget resize step.
this->resize_y = 1; // smallest common child resize step.
/* 1a. Forward call, collect biggest nested array index, and longest/widest child length. */
uint longest = 0; // Longest child found.
uint max_vert_fill = 0; // Biggest vertical fill step.
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
child_wid->SetupSmallestSize(w, init_array);
longest = max(longest, child_wid->smallest_x);
max_vert_fill = max(max_vert_fill, child_wid->GetVerticalStepSize(ST_SMALLEST));
this->smallest_y = max(this->smallest_y, child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom);
}
/* 1b. Make the container higher if needed to accomadate all childs nicely. */
uint max_smallest = this->smallest_y + 3 * max_vert_fill; // Upper limit to computing smallest height.
uint cur_height = this->smallest_y;
while (true) {
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
uint step_size = child_wid->GetVerticalStepSize(ST_SMALLEST);
uint child_height = child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom;
if (step_size > 1 && child_height < cur_height) { // Small step sizes or already fitting childs are not interesting.
uint remainder = (cur_height - child_height) % step_size;
if (remainder > 0) { // Child did not fit entirely, widen the container.
cur_height += step_size - remainder;
assert(cur_height < max_smallest); // Safeguard against infinite height expansion.
/* Remaining childs will adapt to the new cur_height, thus speeding up the computation. */
}
}
}
if (this->smallest_y == cur_height) break;
this->smallest_y = cur_height; // Smallest height got changed, try again.
}
/* 2. For containers that must maintain equal width, extend child minimal size. */
if (this->flags & NC_EQUALSIZE) {
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
if (child_wid->fill_x == 1) child_wid->smallest_x = longest;
}
}
/* 3. Move PIP space to the childs, compute smallest, fill, and resize values of the container. */
if (this->head != NULL) this->head->padding_left += this->pip_pre;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
if (child_wid->next != NULL) {
child_wid->padding_right += this->pip_inter;
} else {
child_wid->padding_right += this->pip_post;
}
this->smallest_x += child_wid->smallest_x + child_wid->padding_left + child_wid->padding_right;
if (child_wid->fill_x > 0) {
if (this->fill_x == 0 || this->fill_x > child_wid->fill_x) this->fill_x = child_wid->fill_x;
}
this->fill_y = LeastCommonMultiple(this->fill_y, child_wid->fill_y);
if (child_wid->resize_x > 0) {
if (this->resize_x == 0 || this->resize_x > child_wid->resize_x) this->resize_x = child_wid->resize_x;
}
this->resize_y = LeastCommonMultiple(this->resize_y, child_wid->resize_y);
}
/* We need to zero the PIP settings so we can re-initialize the tree. */
this->pip_pre = this->pip_inter = this->pip_post = 0;
}
void NWidgetHorizontal::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
{
assert(given_width >= this->smallest_x && given_height >= this->smallest_y);
uint additional_length = given_width - this->smallest_x; // Additional width given to us.
this->StoreSizePosition(sizing, x, y, given_width, given_height);
/* In principle, the additional horizontal space is distributed evenly over the available resizable childs. Due to step sizes, this may not always be feasible.
* To make resizing work as good as possible, first childs with biggest step sizes are done. These may get less due to rounding down.
* This additional space is then given to childs with smaller step sizes. This will give a good result when resize steps of each child is a multiple
* of the child with the smallest non-zero stepsize.
*
* Since child sizes are computed out of order, positions cannot be calculated until all sizes are known. That means it is not possible to compute the child
* size and position, and directly call child->AssignSizePosition() with the computed values.
* Instead, computed child widths and heights are stored in child->current_x and child->current_y values. That is allowed, since this method overwrites those values
* then we call the child.
*/
/* First loop: Find biggest stepsize, find number of childs that want a piece of the pie, handle vertical size for all childs, handle horizontal size for non-resizing childs. */
int num_changing_childs = 0; // Number of childs that can change size.
uint biggest_stepsize = 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
uint hor_step = child_wid->GetHorizontalStepSize(sizing);
if (hor_step > 0) {
num_changing_childs++;
biggest_stepsize = max(biggest_stepsize, hor_step);
} else {
child_wid->current_x = child_wid->smallest_x;
}
uint vert_step = (sizing == ST_SMALLEST) ? 1 : child_wid->GetVerticalStepSize(sizing);
child_wid->current_y = ComputeMaxSize(child_wid->smallest_y, given_height - child_wid->padding_top - child_wid->padding_bottom, vert_step);
}
/* Second loop: Allocate the additional horizontal space over the resizing childs, starting with the biggest resize steps. */
while (biggest_stepsize > 0) {
uint next_biggest_stepsize = 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
uint hor_step = child_wid->GetHorizontalStepSize(sizing);
if (hor_step > biggest_stepsize) continue; // Already done
if (hor_step == biggest_stepsize) {
uint increment = additional_length / num_changing_childs;
num_changing_childs--;
if (hor_step > 1) increment -= increment % hor_step;
child_wid->current_x = child_wid->smallest_x + increment;
additional_length -= increment;
continue;
}
next_biggest_stepsize = max(next_biggest_stepsize, hor_step);
}
biggest_stepsize = next_biggest_stepsize;
}
assert(num_changing_childs == 0);
/* Third loop: Compute position and call the child. */
uint position = 0; // Place to put next child relative to origin of the container.
NWidgetBase *child_wid = rtl ? this->tail : this->head;
while (child_wid != NULL) {
uint child_width = child_wid->current_x;
uint child_x = x + position + (rtl ? child_wid->padding_right : child_wid->padding_left);
uint child_y = y + child_wid->padding_top;
child_wid->AssignSizePosition(sizing, child_x, child_y, child_width, child_wid->current_y, rtl);
position += child_width + child_wid->padding_right + child_wid->padding_left;
child_wid = rtl ? child_wid->prev : child_wid->next;
}
}
/** Horizontal left-to-right container widget. */
NWidgetHorizontalLTR::NWidgetHorizontalLTR(NWidContainerFlags flags) : NWidgetHorizontal(flags)
{
this->type = NWID_HORIZONTAL_LTR;
}
void NWidgetHorizontalLTR::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
{
NWidgetHorizontal::AssignSizePosition(sizing, x, y, given_width, given_height, false);
}
/** Vertical container widget. */
NWidgetVertical::NWidgetVertical(NWidContainerFlags flags) : NWidgetPIPContainer(NWID_VERTICAL, flags)
{
}
void NWidgetVertical::SetupSmallestSize(Window *w, bool init_array)
{
this->smallest_x = 0; // Biggest child.
this->smallest_y = 0; // Sum of minimal size of all childs.
this->fill_x = 1; // smallest common child fill step.
this->fill_y = 0; // smallest non-zero child widget fill step.
this->resize_x = 1; // smallest common child resize step.
this->resize_y = 0; // smallest non-zero child widget resize step.
/* 1a. Forward call, collect biggest nested array index, and longest/widest child length. */
uint highest = 0; // Highest child found.
uint max_hor_fill = 0; // Biggest horizontal fill step.
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
child_wid->SetupSmallestSize(w, init_array);
highest = max(highest, child_wid->smallest_y);
max_hor_fill = max(max_hor_fill, child_wid->GetHorizontalStepSize(ST_SMALLEST));
this->smallest_x = max(this->smallest_x, child_wid->smallest_x + child_wid->padding_left + child_wid->padding_right);
}
/* 1b. Make the container wider if needed to accomadate all childs nicely. */
uint max_smallest = this->smallest_x + 3 * max_hor_fill; // Upper limit to computing smallest height.
uint cur_width = this->smallest_x;
while (true) {
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
uint step_size = child_wid->GetHorizontalStepSize(ST_SMALLEST);
uint child_width = child_wid->smallest_x + child_wid->padding_left + child_wid->padding_right;
if (step_size > 1 && child_width < cur_width) { // Small step sizes or already fitting childs are not interesting.
uint remainder = (cur_width - child_width) % step_size;
if (remainder > 0) { // Child did not fit entirely, widen the container.
cur_width += step_size - remainder;
assert(cur_width < max_smallest); // Safeguard against infinite width expansion.
/* Remaining childs will adapt to the new cur_width, thus speeding up the computation. */
}
}
}
if (this->smallest_x == cur_width) break;
this->smallest_x = cur_width; // Smallest width got changed, try again.
}
/* 2. For containers that must maintain equal width, extend child minimal size. */
if (this->flags & NC_EQUALSIZE) {
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
if (child_wid->fill_y == 1) child_wid->smallest_y = highest;
}
}
/* 3. Move PIP space to the childs, compute smallest, fill, and resize values of the container. */
if (this->head != NULL) this->head->padding_top += this->pip_pre;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
if (child_wid->next != NULL) {
child_wid->padding_bottom += this->pip_inter;
} else {
child_wid->padding_bottom += this->pip_post;
}
this->smallest_y += child_wid->smallest_y + child_wid->padding_top + child_wid->padding_bottom;
if (child_wid->fill_y > 0) {
if (this->fill_y == 0 || this->fill_y > child_wid->fill_y) this->fill_y = child_wid->fill_y;
}
this->fill_x = LeastCommonMultiple(this->fill_x, child_wid->fill_x);
if (child_wid->resize_y > 0) {
if (this->resize_y == 0 || this->resize_y > child_wid->resize_y) this->resize_y = child_wid->resize_y;
}
this->resize_x = LeastCommonMultiple(this->resize_x, child_wid->resize_x);
}
/* We need to zero the PIP settings so we can re-initialize the tree. */
this->pip_pre = this->pip_inter = this->pip_post = 0;
}
void NWidgetVertical::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
{
assert(given_width >= this->smallest_x && given_height >= this->smallest_y);
int additional_length = given_height - this->smallest_y; // Additional height given to us.
this->StoreSizePosition(sizing, x, y, given_width, given_height);
/* Like the horizontal container, the vertical container also distributes additional height evenly, starting with the childs with the biggest resize steps.
* It also stores computed widths and heights into current_x and current_y values of the child.
*/
/* First loop: Find biggest stepsize, find number of childs that want a piece of the pie, handle horizontal size for all childs, handle vertical size for non-resizing childs. */
int num_changing_childs = 0; // Number of childs that can change size.
uint biggest_stepsize = 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
uint vert_step = child_wid->GetVerticalStepSize(sizing);
if (vert_step > 0) {
num_changing_childs++;
biggest_stepsize = max(biggest_stepsize, vert_step);
} else {
child_wid->current_y = child_wid->smallest_y;
}
uint hor_step = (sizing == ST_SMALLEST) ? 1 : child_wid->GetHorizontalStepSize(sizing);
child_wid->current_x = ComputeMaxSize(child_wid->smallest_x, given_width - child_wid->padding_left - child_wid->padding_right, hor_step);
}
/* Second loop: Allocate the additional vertical space over the resizing childs, starting with the biggest resize steps. */
while (biggest_stepsize > 0) {
uint next_biggest_stepsize = 0;
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
uint vert_step = child_wid->GetVerticalStepSize(sizing);
if (vert_step > biggest_stepsize) continue; // Already done
if (vert_step == biggest_stepsize) {
uint increment = additional_length / num_changing_childs;
num_changing_childs--;
if (vert_step > 1) increment -= increment % vert_step;
child_wid->current_y = child_wid->smallest_y + increment;
additional_length -= increment;
continue;
}
next_biggest_stepsize = max(next_biggest_stepsize, vert_step);
}
biggest_stepsize = next_biggest_stepsize;
}
assert(num_changing_childs == 0);
/* Third loop: Compute position and call the child. */
uint position = 0; // Place to put next child relative to origin of the container.
for (NWidgetBase *child_wid = this->head; child_wid != NULL; child_wid = child_wid->next) {
uint child_x = x + (rtl ? child_wid->padding_right : child_wid->padding_left);
uint child_height = child_wid->current_y;
child_wid->AssignSizePosition(sizing, child_x, y + position + child_wid->padding_top, child_wid->current_x, child_height, rtl);
position += child_height + child_wid->padding_top + child_wid->padding_bottom;
}
}
/**
* Generic spacer widget.
* @param length Horizontal size of the spacer widget.
* @param height Vertical size of the spacer widget.
*/
NWidgetSpacer::NWidgetSpacer(int length, int height) : NWidgetResizeBase(NWID_SPACER, 0, 0)
{
this->SetMinimalSize(length, height);
this->SetResize(0, 0);
}
void NWidgetSpacer::SetupSmallestSize(Window *w, bool init_array)
{
this->smallest_x = this->min_x;
this->smallest_y = this->min_y;
}
void NWidgetSpacer::FillNestedArray(NWidgetBase **array, uint length)
{
}
void NWidgetSpacer::Draw(const Window *w)
{
/* Spacer widget is never visible. */
}
void NWidgetSpacer::SetDirty(const Window *w) const
{
/* Spacer widget never need repainting. */
}
NWidgetCore *NWidgetSpacer::GetWidgetFromPos(int x, int y)
{
return NULL;
}
/**
* Constructor parent nested widgets.
* @param tp Type of parent widget.
* @param colour Colour of the parent widget.
* @param index Index in the widget array used by the window system.
* @param child Child container widget (if supplied). If not supplied, a
* vertical container will be inserted while adding the first
* child widget.
*/
NWidgetBackground::NWidgetBackground(WidgetType tp, Colours colour, int index, NWidgetPIPContainer *child) : NWidgetCore(tp, colour, 1, 1, 0x0, STR_NULL)
{
assert(tp == WWT_PANEL || tp == WWT_INSET || tp == WWT_FRAME);
if (index >= 0) this->SetIndex(index);
this->child = child;
}
NWidgetBackground::~NWidgetBackground()
{
if (this->child != NULL) delete this->child;
}
/**
* Add a child to the parent.
* @param nwid Nested widget to add to the background widget.
*
* Unless a child container has been given in the constructor, a parent behaves as a vertical container.
* You can add several childs to it, and they are put underneath each other.
*/
void NWidgetBackground::Add(NWidgetBase *nwid)
{
if (this->child == NULL) {
this->child = new NWidgetVertical();
}
this->child->Add(nwid);
}
/**
* Set additional pre/inter/post space for the background widget.
*
* @param pip_pre Additional space in front of the first child widget (above
* for the vertical container, at the left for the horizontal container).
* @param pip_inter Additional space between two child widgets.
* @param pip_post Additional space after the last child widget (below for the
* vertical container, at the right for the horizontal container).
* @note Using this function implies that the widget has (or will have) child widgets.
*/
void NWidgetBackground::SetPIP(uint8 pip_pre, uint8 pip_inter, uint8 pip_post)
{
if (this->child == NULL) {
this->child = new NWidgetVertical();
}
this->child->SetPIP(pip_pre, pip_inter, pip_post);
}
void NWidgetBackground::SetupSmallestSize(Window *w, bool init_array)
{
if (init_array && this->index >= 0) {
assert(w->nested_array_size > (uint)this->index);
w->nested_array[this->index] = this;
}
if (this->child != NULL) {
this->child->SetupSmallestSize(w, init_array);
this->smallest_x = this->child->smallest_x;
this->smallest_y = this->child->smallest_y;
this->fill_x = this->child->fill_x;
this->fill_y = this->child->fill_y;
this->resize_x = this->child->resize_x;
this->resize_y = this->child->resize_y;
/* Account for the size of the frame's text if that exists */
if (w != NULL && this->type == WWT_FRAME) {
this->child->padding_left = WD_FRAMETEXT_LEFT;
this->child->padding_right = WD_FRAMETEXT_RIGHT;
this->child->padding_top = max((int)WD_FRAMETEXT_TOP, this->widget_data != STR_NULL ? FONT_HEIGHT_NORMAL + WD_FRAMETEXT_TOP / 2 : 0);
this->child->padding_bottom = WD_FRAMETEXT_BOTTOM;
this->smallest_x += this->child->padding_left + this->child->padding_right;
this->smallest_y += this->child->padding_top + this->child->padding_bottom;
if (this->index >= 0) w->SetStringParameters(this->index);
this->smallest_x = max(this->smallest_x, GetStringBoundingBox(this->widget_data).width + WD_FRAMETEXT_LEFT + WD_FRAMETEXT_RIGHT);
}
} else {
Dimension d = {this->min_x, this->min_y};
Dimension fill = {this->fill_x, this->fill_y};
Dimension resize = {this->resize_x, this->resize_y};
if (w != NULL) { // A non-NULL window pointer acts as switch to turn dynamic widget size on.
if (this->type == WWT_FRAME || this->type == WWT_INSET) {
if (this->index >= 0) w->SetStringParameters(this->index);
Dimension background = GetStringBoundingBox(this->widget_data);
background.width += (this->type == WWT_FRAME) ? (WD_FRAMETEXT_LEFT + WD_FRAMERECT_RIGHT) : (WD_INSET_LEFT + WD_INSET_RIGHT);
d = maxdim(d, background);
}
if (this->index >= 0) {
static const Dimension padding = {0, 0};
w->UpdateWidgetSize(this->index, &d, padding, &fill, &resize);
}
}
this->smallest_x = d.width;
this->smallest_y = d.height;
this->fill_x = fill.width;
this->fill_y = fill.height;
this->resize_x = resize.width;
this->resize_y = resize.height;
}
}
void NWidgetBackground::AssignSizePosition(SizingType sizing, uint x, uint y, uint given_width, uint given_height, bool rtl)
{
this->StoreSizePosition(sizing, x, y, given_width, given_height);
if (this->child != NULL) {
uint x_offset = (rtl ? this->child->padding_right : this->child->padding_left);
uint width = given_width - this->child->padding_right - this->child->padding_left;
uint height = given_height - this->child->padding_top - this->child->padding_bottom;
this->child->AssignSizePosition(sizing, x + x_offset, y + this->child->padding_top, width, height, rtl);
}
}
void NWidgetBackground::FillNestedArray(NWidgetBase **array, uint length)
{
if (this->index >= 0 && (uint)(this->index) < length) array[this->index] = this;
if (this->child != NULL) this->child->FillNestedArray(array, length);
}
void NWidgetBackground::Draw(const Window *w)
{
if (this->current_x == 0 || this->current_y == 0) return;
Rect r;
r.left = this->pos_x;
r.right = this->pos_x + this->current_x - 1;
r.top = this->pos_y;
r.bottom = this->pos_y + this->current_y - 1;
const DrawPixelInfo *dpi = _cur_dpi;
if (dpi->left > r.right || dpi->left + dpi->width <= r.left || dpi->top > r.bottom || dpi->top + dpi->height <= r.top) return;
switch (this->type) {
case WWT_PANEL:
assert(this->widget_data == 0);
DrawFrameRect(r.left, r.top, r.right, r.bottom, this->colour, this->IsLowered() ? FR_LOWERED : FR_NONE);
break;
case WWT_FRAME:
if (this->index >= 0) w->SetStringParameters(this->index);
DrawFrame(r, this->colour, this->widget_data);
break;
case WWT_INSET:
if (this->index >= 0) w->SetStringParameters(this->index);
DrawInset(r, this->colour, this->widget_data);
break;
default:
NOT_REACHED();
}
if (this->index >= 0) w->DrawWidget(r, this->index);
if (this->child != NULL) this->child->Draw(w);
if (this->IsDisabled()) {
GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, _colour_gradient[this->colour & 0xF][2], FILLRECT_CHECKER);
}
}
NWidgetCore *NWidgetBackground::GetWidgetFromPos(int x, int y)
{
NWidgetCore *nwid = NULL;
if (IsInsideBS(x, this->pos_x, this->current_x) && IsInsideBS(y, this->pos_y, this->current_y)) {
if (this->child != NULL) nwid = this->child->GetWidgetFromPos(x, y);
if (nwid == NULL) nwid = this;
}
return nwid;
}
NWidgetBase *NWidgetBackground::GetWidgetOfType(WidgetType tp)
{
NWidgetBase *nwid = NULL;
if (this->child != NULL) nwid = this->child->GetWidgetOfType(tp);
if (nwid == NULL && this->type == tp) nwid = this;
return nwid;
}
NWidgetViewport::NWidgetViewport(int index) : NWidgetCore(NWID_VIEWPORT, INVALID_COLOUR, 1, 1, 0x0, STR_NULL)
{
this->SetIndex(index);
}
void NWidgetViewport::SetupSmallestSize(Window *w, bool init_array)
{
if (init_array && this->index >= 0) {
assert(w->nested_array_size > (uint)this->index);
w->nested_array[this->index] = this;
}
this->smallest_x = this->min_x;
this->smallest_y = this->min_y;
}
void NWidgetViewport::Draw(const Window *w)
{
if (this->disp_flags & ND_NO_TRANSPARENCY) {
TransparencyOptionBits to_backup = _transparency_opt;
_transparency_opt = 0; // Disable all transparency
w->DrawViewport();
_transparency_opt = to_backup;
} else {
w->DrawViewport();
}
/* Optionally shade the viewport. */
if (this->disp_flags & (ND_SHADE_GREY | ND_SHADE_DIMMED)) {
GfxFillRect(this->pos_x, this->pos_y, this->pos_x + this->current_x - 1, this->pos_y + this->current_y - 1,
(this->disp_flags & ND_SHADE_DIMMED) ? PALETTE_TO_TRANSPARENT : PALETTE_TO_STRUCT_GREY, FILLRECT_RECOLOUR);
}
}
/**
* Initialize the viewport of the window.
* @param w Window owning the viewport.
* @param follow_flags Type of viewport, see #InitializeViewport().
* @param zoom Zoom level.
*/
void NWidgetViewport::InitializeViewport(Window *w, uint32 follow_flags, ZoomLevel zoom)
{
InitializeWindowViewport(w, this->pos_x, this->pos_y, this->current_x, this->current_y, follow_flags, zoom);
}
/**
* Update the position and size of the viewport (after eg a resize).
* @param w Window owning the viewport.
*/
void NWidgetViewport::UpdateViewportCoordinates(Window *w)
{
ViewPort *vp = w->viewport;
if (vp != NULL) {
vp->left = w->left + this->pos_x;
vp->top = w->top + this->pos_y;
vp->width = this->current_x;
vp->height = this->current_y;
vp->virtual_width = ScaleByZoom(vp->width, vp->zoom);
vp->virtual_height = ScaleByZoom(vp->height, vp->zoom);
}
}
/**
* Compute the row of a scrolled widget that a user clicked in.
* @param clickpos Vertical position of the mouse click (without taking scrolling into account).
* @param widget Widget number of the widget clicked in.
* @param padding Amount of empty space between the widget edge and the top of the first row. Default value is \c 0.
* @param line_height Height of a single row. A negative value means using the vertical resize step of the widget.
* @return Row number clicked at. If clicked at a wrong position, #INT_MAX is returned.
*/
int Scrollbar::GetScrolledRowFromWidget(int clickpos, const Window * const w, int widget, int padding, int line_height) const
{
uint pos = w->GetRowFromWidget(clickpos, widget, padding, line_height);
if (pos != INT_MAX) pos += this->GetPosition();
return (pos >= this->GetCount()) ? INT_MAX : pos;
}
/**
* Set capacity of visible elements from the size and resize properties of a widget.
* @param w Window.
* @param widget Widget with size and resize properties.
* @param padding Padding to subtract from the size.
* @note Updates the position if needed.
*/
void Scrollbar::SetCapacityFromWidget(Window *w, int widget, int padding)
{
NWidgetBase *nwid = w->GetWidget(widget);
if (this->is_vertical) {
this->SetCapacity(((int)nwid->current_y - padding) / (int)nwid->resize_y);
} else {
this->SetCapacity(((int)nwid->current_x - padding) / (int)nwid->resize_x);
}
}
/**
* Scrollbar widget.
* @param tp Scrollbar type. (horizontal/vertical)
* @param colour Colour of the scrollbar.
* @param index Index in the widget array used by the window system.
*/
NWidgetScrollbar::NWidgetScrollbar(WidgetType tp, Colours colour, int index) : NWidgetCore(tp, colour, 1, 1, 0x0, STR_NULL), Scrollbar(tp != NWID_HSCROLLBAR)
{
assert(tp == NWID_HSCROLLBAR || tp == NWID_VSCROLLBAR);
this->SetIndex(index);
switch (this->type) {
case NWID_HSCROLLBAR:
this->SetMinimalSize(30, WD_HSCROLLBAR_HEIGHT);
this->SetResize(1, 0);
this->SetFill(1, 0);
this->SetDataTip(0x0, STR_TOOLTIP_HSCROLL_BAR_SCROLLS_LIST);
break;
case NWID_VSCROLLBAR:
this->SetMinimalSize(WD_VSCROLLBAR_WIDTH, 30);
this->SetResize(0, 1);
this->SetFill(0, 1);
this->SetDataTip(0x0, STR_TOOLTIP_VSCROLL_BAR_SCROLLS_LIST);
break;
default: NOT_REACHED();
}
}
void NWidgetScrollbar::SetupSmallestSize(Window *w, bool init_array)
{
if (init_array && this->index >= 0) {
assert(w->nested_array_size > (uint)this->index);
w->nested_array[this->index] = this;
}
this->smallest_x = this->min_x;
this->smallest_y = this->min_y;
}
void NWidgetScrollbar::Draw(const Window *w)
{
if (this->current_x == 0 || this->current_y == 0) return;
Rect r;
r.left = this->pos_x;
r.right = this->pos_x + this->current_x - 1;
r.top = this->pos_y;
r.bottom = this->pos_y + this->current_y - 1;
const DrawPixelInfo *dpi = _cur_dpi;
if (dpi->left > r.right || dpi->left + dpi->width <= r.left || dpi->top > r.bottom || dpi->top + dpi->height <= r.top) return;
bool up_lowered = HasBit(this->disp_flags, NDB_SCROLLBAR_UP);
bool down_lowered = HasBit(this->disp_flags, NDB_SCROLLBAR_DOWN);
bool middle_lowered = (w->scrolling_scrollbar == this->index);
if (this->type == NWID_HSCROLLBAR) {
DrawHorizontalScrollbar(r, this->colour, up_lowered, middle_lowered, down_lowered, this);
} else {
DrawVerticalScrollbar(r, this->colour, up_lowered, middle_lowered, down_lowered, this);
}
if (this->IsDisabled()) {
GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, _colour_gradient[this->colour & 0xF][2], FILLRECT_CHECKER);
}
}
/** Reset the cached dimensions. */
/* static */ void NWidgetLeaf::InvalidateDimensionCache()
{
shadebox_dimension.width = shadebox_dimension.height = 0;
debugbox_dimension.width = debugbox_dimension.height = 0;
stickybox_dimension.width = stickybox_dimension.height = 0;
resizebox_dimension.width = resizebox_dimension.height = 0;
closebox_dimension.width = closebox_dimension.height = 0;
}
Dimension NWidgetLeaf::shadebox_dimension = {0, 0};
Dimension NWidgetLeaf::debugbox_dimension = {0, 0};
Dimension NWidgetLeaf::stickybox_dimension = {0, 0};
Dimension NWidgetLeaf::resizebox_dimension = {0, 0};
Dimension NWidgetLeaf::closebox_dimension = {0, 0};
/**
* Nested leaf widget.
* @param tp Type of leaf widget.
* @param colour Colour of the leaf widget.
* @param index Index in the widget array used by the window system.
* @param data Data of the widget.
* @param tip Tooltip of the widget.
*/
NWidgetLeaf::NWidgetLeaf(WidgetType tp, Colours colour, int index, uint16 data, StringID tip) : NWidgetCore(tp, colour, 1, 1, data, tip)
{
assert(index >= 0 || tp == WWT_LABEL || tp == WWT_TEXT || tp == WWT_CAPTION || tp == WWT_RESIZEBOX || tp == WWT_SHADEBOX || tp == WWT_DEBUGBOX || tp == WWT_STICKYBOX || tp == WWT_CLOSEBOX);
if (index >= 0) this->SetIndex(index);
this->SetMinimalSize(0, 0);
this->SetResize(0, 0);
switch (tp) {
case WWT_EMPTY:
break;
case WWT_PUSHBTN:
case WWT_IMGBTN:
case WWT_PUSHIMGBTN:
case WWT_IMGBTN_2:
case WWT_TEXTBTN:
case WWT_PUSHTXTBTN:
case WWT_TEXTBTN_2:
case WWT_LABEL:
case WWT_TEXT:
case WWT_MATRIX:
case NWID_BUTTON_DROPDOWN:
case WWT_ARROWBTN:
case WWT_PUSHARROWBTN:
this->SetFill(0, 0);
break;
case WWT_EDITBOX:
this->SetMinimalSize(10, 0);
this->SetFill(0, 0);
break;
case WWT_CAPTION:
this->SetFill(1, 0);
this->SetResize(1, 0);
this->min_y = WD_CAPTION_HEIGHT;
this->SetDataTip(data, STR_TOOLTIP_WINDOW_TITLE_DRAG_THIS);
break;
case WWT_STICKYBOX:
this->SetFill(0, 0);
this->SetMinimalSize(WD_STICKYBOX_WIDTH, 14);
this->SetDataTip(STR_NULL, STR_TOOLTIP_STICKY);
break;
case WWT_SHADEBOX:
this->SetFill(0, 0);
this->SetMinimalSize(WD_SHADEBOX_TOP, 14);
this->SetDataTip(STR_NULL, STR_TOOLTIP_SHADE);
break;
case WWT_DEBUGBOX:
this->SetFill(0, 0);
this->SetMinimalSize(WD_DEBUGBOX_TOP, 14);
this->SetDataTip(STR_NULL, STR_TOOLTIP_DEBUG);
break;
case WWT_RESIZEBOX:
this->SetFill(0, 0);
this->SetMinimalSize(WD_RESIZEBOX_WIDTH, 12);
this->SetDataTip(STR_NULL, STR_TOOLTIP_RESIZE);
break;
case WWT_CLOSEBOX:
this->SetFill(0, 0);
this->SetMinimalSize(WD_CLOSEBOX_WIDTH, 14);
this->SetDataTip(STR_BLACK_CROSS, STR_TOOLTIP_CLOSE_WINDOW);
break;
case WWT_DROPDOWN:
this->SetFill(0, 0);
this->min_y = WD_DROPDOWN_HEIGHT;
break;
default:
NOT_REACHED();
}
}
void NWidgetLeaf::SetupSmallestSize(Window *w, bool init_array)
{
if (this->index >= 0 && init_array) { // Fill w->nested_array[]
assert(w->nested_array_size > (uint)this->index);
w->nested_array[this->index] = this;
}
Dimension size = {this->min_x, this->min_y};
Dimension fill = {this->fill_x, this->fill_y};
Dimension resize = {this->resize_x, this->resize_y};
/* Get padding, and update size with the real content size if appropriate. */
const Dimension *padding = NULL;
switch (this->type) {
case WWT_EMPTY: {
static const Dimension extra = {0, 0};
padding = &extra;
break;
}
case WWT_MATRIX: {
static const Dimension extra = {WD_MATRIX_LEFT + WD_MATRIX_RIGHT, WD_MATRIX_TOP + WD_MATRIX_BOTTOM};
padding = &extra;
break;
}
case WWT_SHADEBOX: {
static const Dimension extra = {WD_SHADEBOX_LEFT + WD_SHADEBOX_RIGHT, WD_SHADEBOX_TOP + WD_SHADEBOX_BOTTOM};
padding = &extra;
if (NWidgetLeaf::shadebox_dimension.width == 0) {
NWidgetLeaf::shadebox_dimension = maxdim(GetSpriteSize(SPR_WINDOW_SHADE), GetSpriteSize(SPR_WINDOW_UNSHADE));
NWidgetLeaf::shadebox_dimension.width += extra.width;
NWidgetLeaf::shadebox_dimension.height += extra.height;
}
size = maxdim(size, NWidgetLeaf::shadebox_dimension);
break;
}
case WWT_DEBUGBOX:
if (_settings_client.gui.newgrf_developer_tools && w->IsNewGRFInspectable()) {
static const Dimension extra = {WD_DEBUGBOX_LEFT + WD_DEBUGBOX_RIGHT, WD_DEBUGBOX_TOP + WD_DEBUGBOX_BOTTOM};
padding = &extra;
if (NWidgetLeaf::debugbox_dimension.width == 0) {
NWidgetLeaf::debugbox_dimension = GetSpriteSize(SPR_WINDOW_DEBUG);
NWidgetLeaf::debugbox_dimension.width += extra.width;
NWidgetLeaf::debugbox_dimension.height += extra.height;
}
size = maxdim(size, NWidgetLeaf::debugbox_dimension);
} else {
/* If the setting is disabled we don't want to see it! */
size.width = 0;
fill.width = 0;
resize.width = 0;
}
break;
case WWT_STICKYBOX: {
static const Dimension extra = {WD_STICKYBOX_LEFT + WD_STICKYBOX_RIGHT, WD_STICKYBOX_TOP + WD_STICKYBOX_BOTTOM};
padding = &extra;
if (NWidgetLeaf::stickybox_dimension.width == 0) {
NWidgetLeaf::stickybox_dimension = maxdim(GetSpriteSize(SPR_PIN_UP), GetSpriteSize(SPR_PIN_DOWN));
NWidgetLeaf::stickybox_dimension.width += extra.width;
NWidgetLeaf::stickybox_dimension.height += extra.height;
}
size = maxdim(size, NWidgetLeaf::stickybox_dimension);
break;
}
case WWT_RESIZEBOX: {
static const Dimension extra = {WD_RESIZEBOX_LEFT + WD_RESIZEBOX_RIGHT, WD_RESIZEBOX_TOP + WD_RESIZEBOX_BOTTOM};
padding = &extra;
if (NWidgetLeaf::resizebox_dimension.width == 0) {
NWidgetLeaf::resizebox_dimension = maxdim(GetSpriteSize(SPR_WINDOW_RESIZE_LEFT), GetSpriteSize(SPR_WINDOW_RESIZE_RIGHT));
NWidgetLeaf::resizebox_dimension.width += extra.width;
NWidgetLeaf::resizebox_dimension.height += extra.height;
}
size = maxdim(size, NWidgetLeaf::resizebox_dimension);
break;
}
case WWT_EDITBOX:
size.height = max(size.height, GetStringBoundingBox("_").height + WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM);
/* FALL THROUGH */
case WWT_PUSHBTN: {
static const Dimension extra = {WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT, WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM};
padding = &extra;
break;
}
case WWT_IMGBTN:
case WWT_IMGBTN_2:
case WWT_PUSHIMGBTN: {
static const Dimension extra = {WD_IMGBTN_LEFT + WD_IMGBTN_RIGHT, WD_IMGBTN_TOP + WD_IMGBTN_BOTTOM};
padding = &extra;
Dimension d2 = GetSpriteSize(this->widget_data);
if (this->type == WWT_IMGBTN_2) d2 = maxdim(d2, GetSpriteSize(this->widget_data + 1));
d2.width += extra.width;
d2.height += extra.height;
size = maxdim(size, d2);
break;
}
case WWT_ARROWBTN:
case WWT_PUSHARROWBTN: {
static const Dimension extra = {WD_IMGBTN_LEFT + WD_IMGBTN_RIGHT, WD_IMGBTN_TOP + WD_IMGBTN_BOTTOM};
padding = &extra;
Dimension d2 = maxdim(GetSpriteSize(SPR_ARROW_LEFT), GetSpriteSize(SPR_ARROW_RIGHT));
d2.width += extra.width;
d2.height += extra.height;
size = maxdim(size, d2);
break;
}
case WWT_CLOSEBOX: {
static const Dimension extra = {WD_CLOSEBOX_LEFT + WD_CLOSEBOX_RIGHT, WD_CLOSEBOX_TOP + WD_CLOSEBOX_BOTTOM};
padding = &extra;
if (NWidgetLeaf::closebox_dimension.width == 0) {
NWidgetLeaf::closebox_dimension = maxdim(GetStringBoundingBox(STR_BLACK_CROSS), GetStringBoundingBox(STR_SILVER_CROSS));
NWidgetLeaf::closebox_dimension.width += extra.width;
NWidgetLeaf::closebox_dimension.height += extra.height;
}
size = maxdim(size, NWidgetLeaf::closebox_dimension);
break;
}
case WWT_TEXTBTN:
case WWT_PUSHTXTBTN:
case WWT_TEXTBTN_2: {
static const Dimension extra = {WD_FRAMERECT_LEFT + WD_FRAMERECT_RIGHT, WD_FRAMERECT_TOP + WD_FRAMERECT_BOTTOM};
padding = &extra;
if (this->index >= 0) w->SetStringParameters(this->index);
Dimension d2 = GetStringBoundingBox(this->widget_data);
d2.width += extra.width;
d2.height += extra.height;
size = maxdim(size, d2);
break;
}
case WWT_LABEL:
case WWT_TEXT: {
static const Dimension extra = {0, 0};
padding = &extra;
if (this->index >= 0) w->SetStringParameters(this->index);
size = maxdim(size, GetStringBoundingBox(this->widget_data));
break;
}
case WWT_CAPTION: {
static const Dimension extra = {WD_CAPTIONTEXT_LEFT + WD_CAPTIONTEXT_RIGHT, WD_CAPTIONTEXT_TOP + WD_CAPTIONTEXT_BOTTOM};
padding = &extra;
if (this->index >= 0) w->SetStringParameters(this->index);
Dimension d2 = GetStringBoundingBox(this->widget_data);
d2.width += extra.width;
d2.height += extra.height;
size = maxdim(size, d2);
break;
}
case WWT_DROPDOWN:
case NWID_BUTTON_DROPDOWN: {
static const Dimension extra = {WD_DROPDOWNTEXT_LEFT + WD_DROPDOWNTEXT_RIGHT, WD_DROPDOWNTEXT_TOP + WD_DROPDOWNTEXT_BOTTOM};
padding = &extra;
if (this->index >= 0) w->SetStringParameters(this->index);
Dimension d2 = GetStringBoundingBox(this->widget_data);
d2.width += extra.width;
d2.height += extra.height;
size = maxdim(size, d2);
break;
}
default:
NOT_REACHED();
}
if (this->index >= 0) w->UpdateWidgetSize(this->index, &size, *padding, &fill, &resize);
this->smallest_x = size.width;
this->smallest_y = size.height;
this->fill_x = fill.width;
this->fill_y = fill.height;
this->resize_x = resize.width;
this->resize_y = resize.height;
}
void NWidgetLeaf::Draw(const Window *w)
{
if (this->current_x == 0 || this->current_y == 0) return;
Rect r;
r.left = this->pos_x;
r.right = this->pos_x + this->current_x - 1;
r.top = this->pos_y;
r.bottom = this->pos_y + this->current_y - 1;
const DrawPixelInfo *dpi = _cur_dpi;
if (dpi->left > r.right || dpi->left + dpi->width <= r.left || dpi->top > r.bottom || dpi->top + dpi->height <= r.top) return;
bool clicked = this->IsLowered();
switch (this->type) {
case WWT_EMPTY:
break;
case WWT_PUSHBTN:
assert(this->widget_data == 0);
DrawFrameRect(r.left, r.top, r.right, r.bottom, this->colour, (clicked) ? FR_LOWERED : FR_NONE);
break;
case WWT_IMGBTN:
case WWT_PUSHIMGBTN:
case WWT_IMGBTN_2:
DrawImageButtons(r, this->type, this->colour, clicked, this->widget_data);
break;
case WWT_TEXTBTN:
case WWT_PUSHTXTBTN:
case WWT_TEXTBTN_2:
if (this->index >= 0) w->SetStringParameters(this->index);
DrawFrameRect(r.left, r.top, r.right, r.bottom, this->colour, (clicked) ? FR_LOWERED : FR_NONE);
DrawLabel(r, this->type, clicked, this->widget_data);
break;
case WWT_ARROWBTN:
case WWT_PUSHARROWBTN: {
SpriteID sprite;
switch (this->widget_data) {
case AWV_DECREASE: sprite = _dynlang.text_dir != TD_RTL ? SPR_ARROW_LEFT : SPR_ARROW_RIGHT; break;
case AWV_INCREASE: sprite = _dynlang.text_dir == TD_RTL ? SPR_ARROW_LEFT : SPR_ARROW_RIGHT; break;
case AWV_LEFT: sprite = SPR_ARROW_LEFT; break;
case AWV_RIGHT: sprite = SPR_ARROW_RIGHT; break;
default: NOT_REACHED();
}
DrawImageButtons(r, WWT_PUSHIMGBTN, this->colour, clicked, sprite);
}
case WWT_LABEL:
if (this->index >= 0) w->SetStringParameters(this->index);
DrawLabel(r, this->type, clicked, this->widget_data);
break;
case WWT_TEXT:
if (this->index >= 0) w->SetStringParameters(this->index);
DrawText(r, (TextColour)this->colour, this->widget_data);
break;
case WWT_MATRIX:
DrawMatrix(r, this->colour, clicked, this->widget_data);
break;
case WWT_EDITBOX:
DrawFrameRect(r.left, r.top, r.right, r.bottom, this->colour, FR_LOWERED | FR_DARKENED);
break;
case WWT_CAPTION:
if (this->index >= 0) w->SetStringParameters(this->index);
DrawCaption(r, this->colour, w->owner, this->widget_data);
break;
case WWT_SHADEBOX:
assert(this->widget_data == 0);
DrawShadeBox(r, this->colour, w->IsShaded());
break;
case WWT_DEBUGBOX:
DrawDebugBox(r, this->colour, clicked);
break;
case WWT_STICKYBOX:
assert(this->widget_data == 0);
DrawStickyBox(r, this->colour, !!(w->flags4 & WF_STICKY));
break;
case WWT_RESIZEBOX:
assert(this->widget_data == 0);
DrawResizeBox(r, this->colour, this->pos_x < (uint)(w->width / 2), !!(w->flags4 & WF_SIZING));
break;
case WWT_CLOSEBOX:
DrawCloseBox(r, this->colour, this->widget_data);
break;
case WWT_DROPDOWN:
if (this->index >= 0) w->SetStringParameters(this->index);
DrawDropdown(r, this->colour, clicked, this->widget_data);
break;
case NWID_BUTTON_DROPDOWN:
if (this->index >= 0) w->SetStringParameters(this->index);
DrawButtonDropdown(r, this->colour, clicked, (this->disp_flags & ND_DROPDOWN_ACTIVE) != 0, this->widget_data);
break;
default:
NOT_REACHED();
}
if (this->index >= 0) w->DrawWidget(r, this->index);
if (this->IsDisabled()) {
GfxFillRect(r.left + 1, r.top + 1, r.right - 1, r.bottom - 1, _colour_gradient[this->colour & 0xF][2], FILLRECT_CHECKER);
}
}
/**
* For a #NWID_BUTTON_DROPDOWN, test whether \a pt refers to the button or to the drop-down.
* @param pt Point in the widget.
* @return The point refers to the button.
*
* @note The magic constants are also used at #DrawButtonDropdown.
*/
bool NWidgetLeaf::ButtonHit(const Point &pt)
{
if (_dynlang.text_dir == TD_LTR) {
int button_width = this->pos_x + this->current_x - 12;
return pt.x < button_width;
} else {
int button_left = this->pos_x + 12;
return pt.x >= button_left;
}
}
/* == Conversion code from NWidgetPart array to NWidgetBase* tree == */
/**
* Construct a single nested widget in \a *dest from its parts.
*
* Construct a NWidgetBase object from a #NWidget function, and apply all
* settings that follow it, until encountering a #EndContainer, another
* #NWidget, or the end of the parts array.
*
* @param parts Array with parts of the nested widget.
* @param count Length of the \a parts array.
* @param dest Address of pointer to use for returning the composed widget.
* @param fill_dest Fill the composed widget with child widgets.
* @param biggest_index Pointer to biggest nested widget index in the tree encountered so far.
* @return Number of widget part elements used to compose the widget.
* @pre \c biggest_index != NULL.
*/
static int MakeNWidget(const NWidgetPart *parts, int count, NWidgetBase **dest, bool *fill_dest, int *biggest_index)
{
int num_used = 0;
*dest = NULL;
*fill_dest = false;
while (count > num_used) {
switch (parts->type) {
case NWID_SPACER:
if (*dest != NULL) return num_used;
*dest = new NWidgetSpacer(0, 0);
break;
case NWID_HORIZONTAL:
if (*dest != NULL) return num_used;
*dest = new NWidgetHorizontal(parts->u.cont_flags);
*fill_dest = true;
break;
case NWID_HORIZONTAL_LTR:
if (*dest != NULL) return num_used;
*dest = new NWidgetHorizontalLTR(parts->u.cont_flags);
*fill_dest = true;
break;
case WWT_PANEL:
case WWT_INSET:
case WWT_FRAME:
if (*dest != NULL) return num_used;
*dest = new NWidgetBackground(parts->type, parts->u.widget.colour, parts->u.widget.index);
*biggest_index = max(*biggest_index, (int)parts->u.widget.index);
*fill_dest = true;
break;
case NWID_VERTICAL:
if (*dest != NULL) return num_used;
*dest = new NWidgetVertical(parts->u.cont_flags);
*fill_dest = true;
break;
case WPT_FUNCTION: {
if (*dest != NULL) return num_used;
/* Ensure proper functioning even when the called code simply writes its largest index. */
int biggest = -1;
*dest = parts->u.func_ptr(&biggest);
*biggest_index = max(*biggest_index, biggest);
*fill_dest = false;
break;
}
case WPT_RESIZE: {
NWidgetResizeBase *nwrb = dynamic_cast(*dest);
if (nwrb != NULL) {
assert(parts->u.xy.x >= 0 && parts->u.xy.y >= 0);
nwrb->SetResize(parts->u.xy.x, parts->u.xy.y);
}
break;
}
case WPT_MINSIZE: {
NWidgetResizeBase *nwrb = dynamic_cast(*dest);
if (nwrb != NULL) {
assert(parts->u.xy.x >= 0 && parts->u.xy.y >= 0);
nwrb->SetMinimalSize(parts->u.xy.x, parts->u.xy.y);
}
break;
}
case WPT_MINTEXTLINES: {
NWidgetResizeBase *nwrb = dynamic_cast(*dest);
if (nwrb != NULL) {
assert(parts->u.text_lines.size >= FS_BEGIN && parts->u.text_lines.size < FS_END);
nwrb->SetMinimalTextLines(parts->u.text_lines.lines, parts->u.text_lines.spacing, parts->u.text_lines.size);
}
break;
}
case WPT_FILL: {
NWidgetResizeBase *nwrb = dynamic_cast(*dest);
if (nwrb != NULL) nwrb->SetFill(parts->u.xy.x, parts->u.xy.y);
break;
}
case WPT_DATATIP: {
NWidgetCore *nwc = dynamic_cast(*dest);
if (nwc != NULL) {
nwc->widget_data = parts->u.data_tip.data;
nwc->tool_tip = parts->u.data_tip.tooltip;
}
break;
}
case WPT_PADDING:
if (*dest != NULL) (*dest)->SetPadding(parts->u.padding.top, parts->u.padding.right, parts->u.padding.bottom, parts->u.padding.left);
break;
case WPT_PIPSPACE: {
NWidgetPIPContainer *nwc = dynamic_cast(*dest);
if (nwc != NULL) nwc->SetPIP(parts->u.pip.pre, parts->u.pip.inter, parts->u.pip.post);
NWidgetBackground *nwb = dynamic_cast(*dest);
if (nwb != NULL) nwb->SetPIP(parts->u.pip.pre, parts->u.pip.inter, parts->u.pip.post);
break;
}
case WPT_SCROLLBAR: {
NWidgetCore *nwc = dynamic_cast(*dest);
if (nwc != NULL) {
nwc->scrollbar_index = parts->u.widget.index;
}
break;
}
case WPT_ENDCONTAINER:
return num_used;
case NWID_VIEWPORT:
if (*dest != NULL) return num_used;
*dest = new NWidgetViewport(parts->u.widget.index);
*biggest_index = max(*biggest_index, (int)parts->u.widget.index);
break;
case NWID_HSCROLLBAR:
case NWID_VSCROLLBAR:
if (*dest != NULL) return num_used;
*dest = new NWidgetScrollbar(parts->type, parts->u.widget.colour, parts->u.widget.index);
*biggest_index = max(*biggest_index, (int)parts->u.widget.index);
break;
case NWID_SELECTION: {
if (*dest != NULL) return num_used;
NWidgetStacked *nws = new NWidgetStacked();
*dest = nws;
*fill_dest = true;
nws->SetIndex(parts->u.widget.index);
*biggest_index = max(*biggest_index, (int)parts->u.widget.index);
break;
}
default:
if (*dest != NULL) return num_used;
assert((parts->type & WWT_MASK) < WWT_LAST || parts->type == NWID_BUTTON_DROPDOWN);
*dest = new NWidgetLeaf(parts->type, parts->u.widget.colour, parts->u.widget.index, 0x0, STR_NULL);
*biggest_index = max(*biggest_index, (int)parts->u.widget.index);
break;
}
num_used++;
parts++;
}
return num_used;
}
/**
* Build a nested widget tree by recursively filling containers with nested widgets read from their parts.
* @param parts Array with parts of the nested widgets.
* @param count Length of the \a parts array.
* @param parent Pointer or container to use for storing the child widgets (*parent == NULL or *parent == container or background widget).
* @param biggest_index Pointer to biggest nested widget index in the tree.
* @return Number of widget part elements used to fill the container.
* @post \c *biggest_index contains the largest widget index of the tree and \c -1 if no index is used.
*/
static int MakeWidgetTree(const NWidgetPart *parts, int count, NWidgetBase **parent, int *biggest_index)
{
/* If *parent == NULL, only the first widget is read and returned. Otherwise, *parent must point to either
* a #NWidgetContainer or a #NWidgetBackground object, and parts are added as much as possible. */
NWidgetContainer *nwid_cont = dynamic_cast(*parent);
NWidgetBackground *nwid_parent = dynamic_cast(*parent);
assert(*parent == NULL || (nwid_cont != NULL && nwid_parent == NULL) || (nwid_cont == NULL && nwid_parent != NULL));
int total_used = 0;
while (true) {
NWidgetBase *sub_widget = NULL;
bool fill_sub = false;
int num_used = MakeNWidget(parts, count - total_used, &sub_widget, &fill_sub, biggest_index);
parts += num_used;
total_used += num_used;
/* Break out of loop when end reached */
if (sub_widget == NULL) break;
/* If sub-widget is a container, recursively fill that container. */
WidgetType tp = sub_widget->type;
if (fill_sub && (tp == NWID_HORIZONTAL || tp == NWID_HORIZONTAL_LTR || tp == NWID_VERTICAL
|| tp == WWT_PANEL || tp == WWT_FRAME || tp == WWT_INSET || tp == NWID_SELECTION)) {
NWidgetBase *sub_ptr = sub_widget;
int num_used = MakeWidgetTree(parts, count - total_used, &sub_ptr, biggest_index);
parts += num_used;
total_used += num_used;
}
/* Add sub_widget to parent container if available, otherwise return the widget to the caller. */
if (nwid_cont) nwid_cont->Add(sub_widget);
if (nwid_parent) nwid_parent->Add(sub_widget);
if (!nwid_cont && !nwid_parent) {
*parent = sub_widget;
return total_used;
}
}
if (count == total_used) return total_used; // Reached the end of the array of parts?
assert(total_used < count);
assert(parts->type == WPT_ENDCONTAINER);
return total_used + 1; // *parts is also 'used'
}
/**
* Construct a nested widget tree from an array of parts.
* @param parts Array with parts of the widgets.
* @param count Length of the \a parts array.
* @param biggest_index Pointer to biggest nested widget index collected in the tree.
* @param container Container to add the nested widgets to. In case it is NULL a vertical container is used.
* @return Root of the nested widget tree, a vertical container containing the entire GUI.
* @ingroup NestedWidgetParts
* @pre \c biggest_index != NULL
* @post \c *biggest_index contains the largest widget index of the tree and \c -1 if no index is used.
*/
NWidgetContainer *MakeNWidgets(const NWidgetPart *parts, int count, int *biggest_index, NWidgetContainer *container)
{
*biggest_index = -1;
if (container == NULL) container = new NWidgetVertical();
NWidgetBase *cont_ptr = container;
MakeWidgetTree(parts, count, &cont_ptr, biggest_index);
return container;
}
/**
* Make a nested widget tree for a window from a parts array. Besides loading, it inserts a shading selection widget
* between the title bar and the window body if the first widget in the parts array looks like a title bar (it is a horizontal
* container with a caption widget) and has a shade box widget.
* @param parts Array with parts of the widgets.
* @param count Length of the \a parts array.
* @param biggest_index Pointer to biggest nested widget index collected in the tree.
* @param [out] shade_select Pointer to the inserted shade selection widget (\c NULL if not unserted).
* @return Root of the nested widget tree, a vertical container containing the entire GUI.
* @ingroup NestedWidgetParts
* @pre \c biggest_index != NULL
* @post \c *biggest_index contains the largest widget index of the tree and \c -1 if no index is used.
*/
NWidgetContainer *MakeWindowNWidgetTree(const NWidgetPart *parts, int count, int *biggest_index, NWidgetStacked **shade_select)
{
*biggest_index = -1;
/* Read the first widget recursively from the array. */
NWidgetBase *nwid = NULL;
int num_used = MakeWidgetTree(parts, count, &nwid, biggest_index);
assert(nwid != NULL);
parts += num_used;
count -= num_used;
NWidgetContainer *root = new NWidgetVertical;
root->Add(nwid);
if (count == 0) { // There is no body at all.
*shade_select = NULL;
return root;
}
/* If the first widget looks like a titlebar, treat it as such.
* If it has a shading box, silently add a shade selection widget in the tree. */
NWidgetHorizontal *hor_cont = dynamic_cast(nwid);
NWidgetContainer *body;
if (hor_cont != NULL && hor_cont->GetWidgetOfType(WWT_CAPTION) != NULL && hor_cont->GetWidgetOfType(WWT_SHADEBOX) != NULL) {
*shade_select = new NWidgetStacked;
root->Add(*shade_select);
body = new NWidgetVertical;
(*shade_select)->Add(body);
} else {
*shade_select = NULL;
body = root;
}
/* Load the remaining parts into 'body'. */
int biggest2 = -1;
MakeNWidgets(parts, count, &biggest2, body);
*biggest_index = max(*biggest_index, biggest2);
return root;
}