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OpenTTD-patches/src/widget.cpp
bjarni 8c098db7a8 (svn r8390) -Codechange (r8384): Rewrote ResizeButtons() 
Now it only works on first and last widget to resize
  It now works with offsets correctly (no longer assumes the left is 0)
  It's no longer needed to have a widget right of the ones you resize
  Can handle any number of widgets
2007-01-24 14:32:20 +00:00

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/* $Id$ */
#include "stdafx.h"
#include "openttd.h"
#include "functions.h"
#include "player.h"
#include "table/sprites.h"
#include "table/strings.h"
#include "window.h"
#include "gfx.h"
#include "viewport.h"
static Point HandleScrollbarHittest(const Scrollbar *sb, int top, int bottom)
{
Point pt;
int height, count, pos, cap;
top += 10;
bottom -= 9;
height = (bottom - top);
pos = sb->pos;
count = sb->count;
cap = sb->cap;
if (count != 0) top += height * pos / count;
if (cap > count) cap = count;
if (count != 0) bottom -= (count - pos - cap) * height / count;
pt.x = top;
pt.y = bottom - 1;
return pt;
}
/*****************************************************
* Special handling for the scrollbar widget type.
* Handles the special scrolling buttons and other
* scrolling.
* Parameters:
* w - Window.
* wi - Pointer to the scrollbar widget.
* x - The X coordinate of the mouse click.
* y - The Y coordinate of the mouse click.
*/
void ScrollbarClickHandler(Window *w, const Widget *wi, int x, int y)
{
int mi, ma, pos;
Scrollbar *sb;
switch (wi->type) {
case WWT_SCROLLBAR: {
// vertical scroller
w->flags4 &= ~WF_HSCROLL;
w->flags4 &= ~WF_SCROLL2;
mi = wi->top;
ma = wi->bottom;
pos = y;
sb = &w->vscroll;
break;
}
case WWT_SCROLL2BAR: {
// 2nd vertical scroller
w->flags4 &= ~WF_HSCROLL;
w->flags4 |= WF_SCROLL2;
mi = wi->top;
ma = wi->bottom;
pos = y;
sb = &w->vscroll2;
break;
}
case WWT_HSCROLLBAR: {
// horizontal scroller
w->flags4 &= ~WF_SCROLL2;
w->flags4 |= WF_HSCROLL;
mi = wi->left;
ma = wi->right;
pos = x;
sb = &w->hscroll;
break;
}
default: return; //this should never happen
}
if (pos <= mi+9) {
// Pressing the upper button?
w->flags4 |= WF_SCROLL_UP;
if (_scroller_click_timeout == 0) {
_scroller_click_timeout = 6;
if (sb->pos != 0) sb->pos--;
}
_left_button_clicked = false;
} else if (pos >= ma-10) {
// Pressing the lower button?
w->flags4 |= WF_SCROLL_DOWN;
if (_scroller_click_timeout == 0) {
_scroller_click_timeout = 6;
if ((byte)(sb->pos + sb->cap) < sb->count)
sb->pos++;
}
_left_button_clicked = false;
} else {
//
Point pt = HandleScrollbarHittest(sb, mi, ma);
if (pos < pt.x) {
sb->pos = max(sb->pos - sb->cap, 0);
} else if (pos > pt.y) {
sb->pos = min(
sb->pos + sb->cap,
max(sb->count - sb->cap, 0)
);
} else {
_scrollbar_start_pos = pt.x - mi - 9;
_scrollbar_size = ma - mi - 23;
w->flags4 |= WF_SCROLL_MIDDLE;
_scrolling_scrollbar = true;
_cursorpos_drag_start = _cursor.pos;
}
}
SetWindowDirty(w);
}
/** 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,y Window client coordinates
* @return A widget index, or -1 if no widget was found.
*/
int GetWidgetFromPos(const Window *w, int x, int y)
{
uint index;
int found_index = -1;
// Go through the widgets and check if we find the widget that the coordinate is
// inside.
for (index = 0; index < w->widget_count; index++) {
const Widget *wi = &w->widget[index];
if (wi->type == WWT_EMPTY || wi->type == WWT_FRAME) continue;
if (x >= wi->left && x <= wi->right && y >= wi->top && y <= wi->bottom &&
!IsWindowWidgetHidden(w, index)) {
found_index = index;
}
}
return found_index;
}
void DrawFrameRect(int left, int top, int right, int bottom, int ctab, FrameFlags flags)
{
uint dark = _colour_gradient[ctab][3];
uint medium_dark = _colour_gradient[ctab][5];
uint medium_light = _colour_gradient[ctab][6];
uint light = _colour_gradient[ctab][7];
if (flags & FR_TRANSPARENT) {
GfxFillRect(left, top, right, bottom, PALETTE_TO_TRANSPARENT | (1 << USE_COLORTABLE));
} 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);
}
}
}
void DrawWindowWidgets(const Window *w)
{
const DrawPixelInfo* dpi = _cur_dpi;
Rect r;
uint i;
for (i = 0; i < w->widget_count; i++) {
const Widget *wi = &w->widget[i];
bool clicked = IsWindowWidgetLowered(w, i);
if (dpi->left > (r.right=/*w->left + */wi->right) ||
dpi->left + dpi->width <= (r.left=wi->left/* + w->left*/) ||
dpi->top > (r.bottom=/*w->top +*/ wi->bottom) ||
dpi->top + dpi->height <= (r.top = /*w->top +*/ wi->top) ||
IsWindowWidgetHidden(w, i)) {
continue;
}
switch (wi->type & WWT_MASK) {
case WWT_IMGBTN:
case WWT_IMGBTN_2: {
int img = wi->data;
assert(img != 0);
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
/* show different image when clicked for WWT_IMGBTN_2 */
if ((wi->type & WWT_MASK) == WWT_IMGBTN_2 && clicked) img++;
DrawSprite(img, PAL_NONE, r.left + 1 + clicked, r.top + 1 + clicked);
goto draw_default;
}
case WWT_PANEL: {
assert(wi->data == 0);
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
goto draw_default;
}
case WWT_TEXTBTN:
case WWT_TEXTBTN_2: {
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
}
/* fall through */
case WWT_LABEL: {
StringID str = wi->data;
if ((wi->type & WWT_MASK) == WWT_TEXTBTN_2 && clicked) str++;
DrawStringCentered(((r.left + r.right + 1) >> 1) + clicked, ((r.top + r.bottom + 1) >> 1) - 5 + clicked, str, 0);
goto draw_default;
}
case WWT_INSET: {
StringID str = wi->data;
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, FR_LOWERED | FR_DARKENED);
if (str != STR_NULL) DrawStringTruncated(r.left + 2, r.top + 1, str, 0, r.right - r.left - 10);
goto draw_default;
}
case WWT_MATRIX: {
int c, d, ctr;
int x, amt1, amt2;
int color;
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
c = GB(wi->data, 0, 8);
amt1 = (wi->right - wi->left + 1) / c;
d = GB(wi->data, 8, 8);
amt2 = (wi->bottom - wi->top + 1) / d;
color = _colour_gradient[wi->color & 0xF][6];
x = r.left;
for (ctr = c; ctr > 1; ctr--) {
x += amt1;
GfxFillRect(x, r.top + 1, x, r.bottom - 1, color);
}
x = r.top;
for (ctr = d; ctr > 1; ctr--) {
x += amt2;
GfxFillRect(r.left + 1, x, r.right - 1, x, color);
}
color = _colour_gradient[wi->color&0xF][4];
x = r.left - 1;
for (ctr = c; ctr > 1; ctr--) {
x += amt1;
GfxFillRect(x, r.top + 1, x, r.bottom - 1, color);
}
x = r.top - 1;
for (ctr = d; ctr > 1; ctr--) {
x += amt2;
GfxFillRect(r.left+1, x, r.right-1, x, color);
}
goto draw_default;
}
// vertical scrollbar
case WWT_SCROLLBAR: {
Point pt;
int c1,c2;
assert(r.right - r.left == 11); // XXX - to ensure the same sizes are used everywhere!
// draw up/down buttons
clicked = ((w->flags4 & (WF_SCROLL_UP | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_UP);
DrawFrameRect(r.left, r.top, r.right, r.top + 9, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
DoDrawString(UPARROW, r.left + 2 + clicked, r.top + clicked, 0x10);
clicked = (((w->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_DOWN));
DrawFrameRect(r.left, r.bottom - 9, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
DoDrawString(DOWNARROW, r.left + 2 + clicked, r.bottom - 9 + clicked, 0x10);
c1 = _colour_gradient[wi->color&0xF][3];
c2 = _colour_gradient[wi->color&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 | (1 << PALETTE_MODIFIER_GREYOUT));
// 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);
pt = HandleScrollbarHittest(&w->vscroll, r.top, r.bottom);
DrawFrameRect(r.left, pt.x, r.right, pt.y, wi->color, (w->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL | WF_SCROLL2)) == WF_SCROLL_MIDDLE ? FR_LOWERED : FR_NONE);
break;
}
case WWT_SCROLL2BAR: {
Point pt;
int c1,c2;
assert(r.right - r.left == 11); // XXX - to ensure the same sizes are used everywhere!
// draw up/down buttons
clicked = ((w->flags4 & (WF_SCROLL_UP | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_UP | WF_SCROLL2));
DrawFrameRect(r.left, r.top, r.right, r.top + 9, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
DoDrawString(UPARROW, r.left + 2 + clicked, r.top + clicked, 0x10);
clicked = ((w->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_DOWN | WF_SCROLL2));
DrawFrameRect(r.left, r.bottom - 9, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
DoDrawString(DOWNARROW, r.left + 2 + clicked, r.bottom - 9 + clicked, 0x10);
c1 = _colour_gradient[wi->color&0xF][3];
c2 = _colour_gradient[wi->color&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 | (1 << PALETTE_MODIFIER_GREYOUT));
// 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);
pt = HandleScrollbarHittest(&w->vscroll2, r.top, r.bottom);
DrawFrameRect(r.left, pt.x, r.right, pt.y, wi->color, (w->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL | WF_SCROLL2)) == (WF_SCROLL_MIDDLE | WF_SCROLL2) ? FR_LOWERED : FR_NONE);
break;
}
// horizontal scrollbar
case WWT_HSCROLLBAR: {
Point pt;
int c1,c2;
assert(r.bottom - r.top == 11); // XXX - to ensure the same sizes are used everywhere!
clicked = ((w->flags4 & (WF_SCROLL_UP | WF_HSCROLL)) == (WF_SCROLL_UP | WF_HSCROLL));
DrawFrameRect(r.left, r.top, r.left + 9, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
DrawSprite(SPR_ARROW_LEFT, PAL_NONE, r.left + 1 + clicked, r.top + 1 + clicked);
clicked = ((w->flags4 & (WF_SCROLL_DOWN | WF_HSCROLL)) == (WF_SCROLL_DOWN | WF_HSCROLL));
DrawFrameRect(r.right-9, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
DrawSprite(SPR_ARROW_RIGHT, PAL_NONE, r.right - 8 + clicked, r.top + 1 + clicked);
c1 = _colour_gradient[wi->color&0xF][3];
c2 = _colour_gradient[wi->color&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 | (1 << PALETTE_MODIFIER_GREYOUT));
// 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
pt = HandleScrollbarHittest(&w->hscroll, r.left, r.right);
DrawFrameRect(pt.x, r.top, pt.y, r.bottom, wi->color, (w->flags4 & (WF_SCROLL_MIDDLE | WF_HSCROLL)) == (WF_SCROLL_MIDDLE | WF_HSCROLL) ? FR_LOWERED : FR_NONE);
break;
}
case WWT_FRAME: {
int c1,c2;
int x2 = r.left; // by default the left side is the left side of the widget
if (wi->data != 0) x2 = DrawString(r.left + 6, r.top, wi->data, 0);
c1 = _colour_gradient[wi->color][3];
c2 = _colour_gradient[wi->color][7];
//Line from upper left corner to start of text
GfxFillRect(r.left, r.top+4, r.left+4,r.top+4, c1);
GfxFillRect(r.left+1, r.top+5, r.left+4,r.top+5, c2);
// Line from end of text to upper right corner
GfxFillRect(x2, r.top+4, r.right-1,r.top+4,c1);
GfxFillRect(x2, r.top+5, r.right-2,r.top+5,c2);
// Line from upper left corner to bottom left corner
GfxFillRect(r.left, r.top+5, r.left, r.bottom-1, c1);
GfxFillRect(r.left+1, r.top+6, r.left+1, r.bottom-2, c2);
//Line from upper right corner to bottom right corner
GfxFillRect(r.right-1, r.top+5, r.right-1, r.bottom-2, c1);
GfxFillRect(r.right, r.top+4, 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);
goto draw_default;
}
case WWT_STICKYBOX: {
assert(r.right - r.left == 11); // XXX - to ensure the same sizes are used everywhere!
clicked = !!(w->flags4 & WF_STICKY);
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
DrawSprite((clicked) ? SPR_PIN_UP : SPR_PIN_DOWN, PAL_NONE, r.left + 2 + clicked, r.top + 3 + clicked);
break;
}
case WWT_RESIZEBOX: {
assert(r.right - r.left == 11); // XXX - to ensure the same sizes are used everywhere!
clicked = !!(w->flags4 & WF_SIZING);
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : FR_NONE);
DrawSprite(SPR_WINDOW_RESIZE, PAL_NONE, r.left + 3 + clicked, r.top + 3 + clicked);
break;
}
case WWT_CLOSEBOX: {
assert(r.right - r.left == 10); // ensure the same sizes are used everywhere
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, FR_NONE);
DrawString(r.left + 2, r.top + 2, STR_00C5, 0);
break;
}
case WWT_CAPTION: {
assert(r.bottom - r.top == 13); // XXX - to ensure the same sizes are used everywhere!
DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, FR_BORDERONLY);
DrawFrameRect(r.left+1, r.top+1, r.right-1, r.bottom-1, wi->color, (w->caption_color == 0xFF) ? FR_LOWERED | FR_DARKENED : FR_LOWERED | FR_DARKENED | FR_BORDERONLY);
if (w->caption_color != 0xFF) {
GfxFillRect(r.left+2, r.top+2, r.right-2, r.bottom-2, _colour_gradient[_player_colors[w->caption_color]][4]);
}
DrawStringCenteredTruncated(r.left + 2, r.right - 2, r.top+2, wi->data, 0x84);
draw_default:;
if (IsWindowWidgetDisabled(w, i)) {
GfxFillRect(r.left+1, r.top+1, r.right-1, r.bottom-1, _colour_gradient[wi->color&0xF][2] | (1 << PALETTE_MODIFIER_GREYOUT));
}
}
}
}
if (w->flags4 & WF_WHITE_BORDER_MASK) {
//DrawFrameRect(w->left, w->top, w->left + w->width-1, w->top+w->height-1, 0xF, 0x10);
DrawFrameRect(0, 0, w->width-1, w->height-1, 0xF, FR_BORDERONLY);
}
}
static const Widget _dropdown_menu_widgets[] = {
{ WWT_PANEL, RESIZE_NONE, 0, 0, 0, 0, 0, 0x0, STR_NULL},
{ WWT_SCROLLBAR, RESIZE_NONE, 0, 0, 0, 0, 0, 0x0, STR_0190_SCROLL_BAR_SCROLLS_LIST},
{ WIDGETS_END},
};
static int GetDropdownItem(const Window *w)
{
byte item, counter;
int y;
if (GetWidgetFromPos(w, _cursor.pos.x - w->left, _cursor.pos.y - w->top) < 0)
return -1;
y = _cursor.pos.y - w->top - 2 + w->vscroll.pos * 10;
if (y < 0)
return - 1;
item = y / 10;
if (item >= WP(w,dropdown_d).num_items || (HASBIT(WP(w,dropdown_d).disabled_state, item) && !HASBIT(WP(w,dropdown_d).hidden_state, item)) || WP(w,dropdown_d).items[item] == 0)
return - 1;
// Skip hidden items -- +1 for each hidden item before the clicked item.
for (counter = 0; item >= counter; ++counter)
if (HASBIT(WP(w,dropdown_d).hidden_state, counter)) item++;
return item;
}
static void DropdownMenuWndProc(Window *w, WindowEvent *e)
{
int item;
switch (e->event) {
case WE_PAINT: {
int x,y,i,sel;
int width, height;
DrawWindowWidgets(w);
x = 1;
y = 2 - w->vscroll.pos * 10;
sel = WP(w,dropdown_d).selected_index;
width = w->widget[0].right - 3;
height = w->widget[0].bottom - 3;
for (i = 0; WP(w,dropdown_d).items[i] != INVALID_STRING_ID; i++, sel--) {
if (HASBIT(WP(w,dropdown_d).hidden_state, i)) continue;
if (y >= 0 && y <= height) {
if (WP(w,dropdown_d).items[i] != STR_NULL) {
if (sel == 0) GfxFillRect(x + 1, y, x + width, y + 9, 0);
DrawStringTruncated(x + 2, y, WP(w,dropdown_d).items[i], sel == 0 ? 12 : 16, x + width);
if (HASBIT(WP(w,dropdown_d).disabled_state, i)) {
GfxFillRect(x, y, x + width, y + 9,
(1 << PALETTE_MODIFIER_GREYOUT) | _colour_gradient[_dropdown_menu_widgets[0].color][5]
);
}
} else {
int c1 = _colour_gradient[_dropdown_menu_widgets[0].color][3];
int c2 = _colour_gradient[_dropdown_menu_widgets[0].color][7];
GfxFillRect(x + 1, y + 3, x + w->width - 5, y + 3, c1);
GfxFillRect(x + 1, y + 4, x + w->width - 5, y + 4, c2);
}
}
y += 10;
}
} break;
case WE_CLICK: {
if (e->we.click.widget != 0) break;
item = GetDropdownItem(w);
if (item >= 0) {
WP(w,dropdown_d).click_delay = 4;
WP(w,dropdown_d).selected_index = item;
SetWindowDirty(w);
}
} break;
case WE_MOUSELOOP: {
Window *w2 = FindWindowById(WP(w,dropdown_d).parent_wnd_class, WP(w,dropdown_d).parent_wnd_num);
if (w2 == NULL) {
DeleteWindow(w);
return;
}
if (WP(w,dropdown_d).click_delay != 0 && --WP(w,dropdown_d).click_delay == 0) {
WindowEvent e;
e.event = WE_DROPDOWN_SELECT;
e.we.dropdown.button = WP(w,dropdown_d).parent_button;
e.we.dropdown.index = WP(w,dropdown_d).selected_index;
w2->wndproc(w2, &e);
DeleteWindow(w);
return;
}
if (WP(w,dropdown_d).drag_mode) {
item = GetDropdownItem(w);
if (!_left_button_clicked) {
WP(w,dropdown_d).drag_mode = false;
if (item < 0) return;
WP(w,dropdown_d).click_delay = 2;
} else {
if (item < 0) return;
}
WP(w,dropdown_d).selected_index = item;
SetWindowDirty(w);
}
} break;
case WE_DESTROY: {
Window *w2 = FindWindowById(WP(w,dropdown_d).parent_wnd_class, WP(w,dropdown_d).parent_wnd_num);
if (w2 != NULL) {
RaiseWindowWidget(w2, WP(w,dropdown_d).parent_button);
InvalidateWidget(w2, WP(w,dropdown_d).parent_button);
}
} break;
}
}
void ShowDropDownMenu(Window *w, const StringID *strings, int selected, int button, uint32 disabled_mask, uint32 hidden_mask)
{
int i;
const Widget *wi;
Window *w2;
const Window *w3;
bool is_dropdown_menu_shown = IsWindowWidgetLowered(w, button);
int top, height;
int screen_top, screen_bottom;
bool scroll = false;
DeleteWindowById(WC_DROPDOWN_MENU, 0);
if (is_dropdown_menu_shown) return;
LowerWindowWidget(w, button);
InvalidateWidget(w, button);
for (i = 0; strings[i] != INVALID_STRING_ID; i++) {}
if (i == 0) return;
wi = &w->widget[button];
if (hidden_mask != 0) {
uint j;
for (j = 0; strings[j] != INVALID_STRING_ID; j++) {
if (HASBIT(hidden_mask, j)) i--;
}
}
/* The preferred position is just below the dropdown calling widget */
top = w->top + wi->bottom + 2;
height = i * 10 + 4;
w3 = FindWindowById(WC_STATUS_BAR, 0);
screen_bottom = w3 == NULL ? _screen.height : w3->top;
/* Check if the dropdown will fully fit below the widget */
if (top + height >= screen_bottom) {
w3 = FindWindowById(WC_MAIN_TOOLBAR, 0);
screen_top = w3 == NULL ? 0 : w3->top + w3->height;
/* If not, check if it will fit above the widget */
if (w->top + wi->top - height - 1 > screen_top) {
top = w->top + wi->top - height - 1;
} else {
/* ... and lastly if it won't, enable the scroll bar and fit the
* list in below the widget */
int rows = (screen_bottom - 4 - top) / 10;
height = rows * 10 + 4;
scroll = true;
}
}
w2 = AllocateWindow(
w->left + wi[-1].left + 1,
top,
wi->right - wi[-1].left + 1,
height,
DropdownMenuWndProc,
WC_DROPDOWN_MENU,
_dropdown_menu_widgets);
w2->widget[0].color = wi->color;
w2->widget[0].right = wi->right - wi[-1].left;
w2->widget[0].bottom = height - 1;
SetWindowWidgetHiddenState(w2, 1, !scroll);
if (scroll) {
/* We're scrolling, so enable the scroll bar and shrink the list by
* the scrollbar's width */
w2->widget[1].color = wi->color;
w2->widget[1].right = w2->widget[0].right;
w2->widget[1].left = w2->widget[1].right - 11;
w2->widget[1].bottom = height - 1;
w2->widget[0].right -= 12;
w2->vscroll.cap = (height - 4) / 10;
w2->vscroll.count = i;
}
w2->desc_flags = WDF_DEF_WIDGET;
w2->flags4 &= ~WF_WHITE_BORDER_MASK;
WP(w2,dropdown_d).disabled_state = disabled_mask;
WP(w2,dropdown_d).hidden_state = hidden_mask;
WP(w2,dropdown_d).parent_wnd_class = w->window_class;
WP(w2,dropdown_d).parent_wnd_num = w->window_number;
WP(w2,dropdown_d).parent_button = button;
WP(w2,dropdown_d).num_items = i;
WP(w2,dropdown_d).selected_index = selected;
WP(w2,dropdown_d).items = strings;
WP(w2,dropdown_d).click_delay = 0;
WP(w2,dropdown_d).drag_mode = true;
}
static void ResizeWidgets(Window *w, byte a, byte b)
{
int16 offset = w->widget[a].left;
int16 length = w->widget[b].right - offset;
w->widget[a].right = (length / 2) + offset;
w->widget[b].left = w->widget[a].right + 1;
}
static void ResizeWidgets(Window *w, byte a, byte b, byte c)
{
int16 offset = w->widget[a].left;
int16 length = w->widget[c].right - offset;
w->widget[a].right = length / 3;
w->widget[b].right = w->widget[a].right * 2;
w->widget[a].right += offset;
w->widget[b].right += offset;
/* Now the right side of the buttons are set. We will now set the left sides next to them */
w->widget[b].left = w->widget[a].right + 1;
w->widget[c].left = w->widget[b].right + 1;
}
/** Evenly distribute some widgets when resizing horizontally (often a button row)
* When only two arguments are given, the widgets are presumed to be on a line and only the ends are given
* @param w widow to modify
* @param left The leftmost widget to resize
* @param right The rightmost widget to resize. Since right side of it is used, remember to set it to RESIZE_RIGHT
*/
void ResizeButtons(Window *w, byte left, byte right)
{
int16 num_widgets = right - left + 1;
if (num_widgets < 2) NOT_REACHED();
switch (num_widgets) {
case 2: ResizeWidgets(w, left, right); break;
case 3: ResizeWidgets(w, left, left + 1, right); break;
default: {
/* Looks like we got more than 3 widgets to resize
* Now we will find the middle of the space desinated for the widgets
* and place half of the widgets on each side of it and call recursively.
* Eventually we will get down to blocks of 2-3 widgets and we got code to handle those cases */
int16 offset = w->widget[left].left;
int16 length = w->widget[right].right - offset;
byte widget = ((num_widgets - 1)/ 2) + left; // rightmost widget of the left side
/* Now we need to find the middle of the widgets.
* It will not always be the middle because if we got an uneven number of widgets,
* we will need it to be 2/5, 3/7 and so on
* To get this, we multiply with num_widgets/num_widgets. Since we calculate in int, we will get:
*
* num_widgets/2 (rounding down)
* ---------------
* num_widgets
*
* as multiplier to length. We just multiply before divide to that we stay in the int area though */
int16 middle = ((length * num_widgets) / (2 * num_widgets)) + offset;
/* Set left and right on the widgets, that's next to our "middle" */
w->widget[widget].right = middle;
w->widget[widget + 1].left = w->widget[widget].right + 1;
/* Now resize the left and right of the middle */
ResizeButtons(w, left, widget);
ResizeButtons(w, widget + 1, right);
}
}
}
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