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386 lines
10 KiB
C++
386 lines
10 KiB
C++
/* $Id$ */
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/** @file dropdown.cpp Implementation of the dropdown widget. */
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#include "../stdafx.h"
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#include "../window_gui.h"
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#include "../strings_func.h"
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#include "../gfx_func.h"
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#include "../window_func.h"
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#include "../core/math_func.hpp"
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#include "dropdown_type.h"
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#include "table/strings.h"
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void DropDownListItem::Draw(int x, int y, uint width, uint height, bool sel, int bg_colour) const
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{
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int c1 = _colour_gradient[bg_colour][3];
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int c2 = _colour_gradient[bg_colour][7];
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GfxFillRect(x + 1, y + 3, x + width - 2, y + 3, c1);
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GfxFillRect(x + 1, y + 4, x + width - 2, y + 4, c2);
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}
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uint DropDownListStringItem::Width() const
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{
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char buffer[512];
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GetString(buffer, this->String(), lastof(buffer));
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return GetStringBoundingBox(buffer).width;
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}
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void DropDownListStringItem::Draw(int x, int y, uint width, uint height, bool sel, int bg_colour) const
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{
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DrawStringTruncated(x + 2, y, this->String(), sel ? TC_WHITE : TC_BLACK, width);
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}
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StringID DropDownListParamStringItem::String() const
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{
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for (uint i = 0; i < lengthof(this->decode_params); i++) SetDParam(i, this->decode_params[i]);
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return this->string;
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}
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uint DropDownListCharStringItem::Width() const
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{
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return GetStringBoundingBox(this->string).width;
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}
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void DropDownListCharStringItem::Draw(int x, int y, uint width, uint height, bool sel, int bg_colour) const
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{
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DoDrawStringTruncated(this->string, x + 2, y, sel ? TC_WHITE : TC_BLACK, width);
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}
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/**
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* Delete all items of a drop down list and the list itself
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* @param list List to delete.
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*/
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static void DeleteDropDownList(DropDownList *list)
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{
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for (DropDownList::iterator it = list->begin(); it != list->end(); ++it) {
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DropDownListItem *item = *it;
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delete item;
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}
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delete list;
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}
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static const Widget _dropdown_menu_widgets[] = {
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{ WWT_PANEL, RESIZE_NONE, COLOUR_END, 0, 0, 0, 0, 0x0, STR_NULL},
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{ WWT_SCROLLBAR, RESIZE_NONE, COLOUR_END, 0, 0, 0, 0, 0x0, STR_0190_SCROLL_BAR_SCROLLS_LIST},
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{ WIDGETS_END},
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};
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struct DropdownWindow : Window {
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WindowClass parent_wnd_class;
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WindowNumber parent_wnd_num;
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byte parent_button;
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DropDownList *list;
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int selected_index;
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byte click_delay;
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bool drag_mode;
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bool instant_close;
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int scrolling;
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DropdownWindow(int x, int y, int width, int height, const Widget *widget) : Window(x, y, width, height, WC_DROPDOWN_MENU, widget)
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{
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this->FindWindowPlacementAndResize(width, height);
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}
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~DropdownWindow()
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{
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Window *w2 = FindWindowById(this->parent_wnd_class, this->parent_wnd_num);
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if (w2 != NULL) {
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w2->RaiseWidget(this->parent_button);
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w2->InvalidateWidget(this->parent_button);
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}
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DeleteDropDownList(this->list);
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}
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bool GetDropDownItem(int &value)
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{
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if (GetWidgetFromPos(this, _cursor.pos.x - this->left, _cursor.pos.y - this->top) < 0) return false;
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int y = _cursor.pos.y - this->top - 2;
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int width = this->widget[0].right - 3;
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int pos = this->vscroll.pos;
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const DropDownList *list = this->list;
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for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
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/* Skip items that are scrolled up */
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if (--pos >= 0) continue;
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const DropDownListItem *item = *it;
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int item_height = item->Height(width);
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if (y < item_height) {
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if (item->masked || !item->Selectable()) return false;
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value = item->result;
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return true;
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}
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y -= item_height;
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}
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return false;
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}
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virtual void OnPaint()
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{
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this->DrawWidgets();
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int x = 1;
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int y = 2;
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int sel = this->selected_index;
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int width = this->widget[0].right - 2;
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int height = this->widget[0].bottom;
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int pos = this->vscroll.pos;
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DropDownList *list = this->list;
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for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
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const DropDownListItem *item = *it;
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int item_height = item->Height(width);
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/* Skip items that are scrolled up */
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if (--pos >= 0) continue;
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if (y + item_height < height) {
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if (sel == item->result) GfxFillRect(x + 1, y, x + width - 1, y + item_height - 1, 0);
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item->Draw(x, y, width, height, sel == item->result, (TextColour)this->widget[0].colour);
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if (item->masked) {
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GfxFillRect(x, y, x + width - 1, y + item_height - 1,
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_colour_gradient[this->widget[0].colour][5], FILLRECT_CHECKER
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);
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}
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}
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y += item_height;
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}
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};
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virtual void OnClick(Point pt, int widget)
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{
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if (widget != 0) return;
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int item;
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if (this->GetDropDownItem(item)) {
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this->click_delay = 4;
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this->selected_index = item;
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this->SetDirty();
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}
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}
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virtual void OnTick()
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{
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if (this->scrolling == -1) {
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this->vscroll.pos = max(0, this->vscroll.pos - 1);
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this->SetDirty();
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} else if (this->scrolling == 1) {
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this->vscroll.pos = min(this->vscroll.count - this->vscroll.cap, this->vscroll.pos + 1);
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this->SetDirty();
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}
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this->scrolling = 0;
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}
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virtual void OnMouseLoop()
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{
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Window *w2 = FindWindowById(this->parent_wnd_class, this->parent_wnd_num);
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if (w2 == NULL) {
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delete this;
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return;
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}
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if (this->click_delay != 0 && --this->click_delay == 0) {
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w2->OnDropdownSelect(this->parent_button, this->selected_index);
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delete this;
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return;
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}
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if (this->drag_mode) {
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int item;
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if (!_left_button_clicked) {
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this->drag_mode = false;
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if (!this->GetDropDownItem(item)) {
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if (this->instant_close) {
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if (GetWidgetFromPos(w2, _cursor.pos.x - w2->left, _cursor.pos.y - w2->top) == this->parent_button) {
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/* Send event for selected option if we're still
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* on the parent button of the list. */
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w2->OnDropdownSelect(this->parent_button, this->selected_index);
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}
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delete this;
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}
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return;
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}
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this->click_delay = 2;
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} else {
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if (_cursor.pos.y <= this->top + 2) {
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/* Cursor is above the list, set scroll up */
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this->scrolling = -1;
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return;
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} else if (_cursor.pos.y >= this->top + this->height - 2) {
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/* Cursor is below list, set scroll down */
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this->scrolling = 1;
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return;
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}
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if (!this->GetDropDownItem(item)) return;
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}
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this->selected_index = item;
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this->SetDirty();
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}
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}
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};
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void ShowDropDownList(Window *w, DropDownList *list, int selected, int button, uint width, bool auto_width, bool instant_close)
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{
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DeleteWindowById(WC_DROPDOWN_MENU, 0);
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w->LowerWidget(button);
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w->InvalidateWidget(button);
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/* Our parent's button widget is used to determine where to place the drop
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* down list window. */
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const Widget *wi = &w->widget[button];
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/* The preferred position is just below the dropdown calling widget */
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int top = w->top + wi->bottom + 1;
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if (width == 0) width = wi->right - wi->left + 1;
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uint max_item_width = 0;
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if (auto_width) {
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/* Find the longest item in the list */
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for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
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const DropDownListItem *item = *it;
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max_item_width = max(max_item_width, item->Width() + 5);
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}
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}
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/* Total length of list */
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int list_height = 0;
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for (DropDownList::const_iterator it = list->begin(); it != list->end(); ++it) {
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DropDownListItem *item = *it;
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list_height += item->Height(width);
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}
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/* Height of window visible */
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int height = list_height;
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/* Check if the status bar is visible, as we don't want to draw over it */
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Window *w3 = FindWindowById(WC_STATUS_BAR, 0);
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int screen_bottom = w3 == NULL ? _screen.height : w3->top;
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bool scroll = false;
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/* Check if the dropdown will fully fit below the widget */
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if (top + height + 4 >= screen_bottom) {
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w3 = FindWindowById(WC_MAIN_TOOLBAR, 0);
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int screen_top = w3 == NULL ? 0 : w3->top + w3->height;
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/* If not, check if it will fit above the widget */
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if (w->top + wi->top - height > screen_top) {
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top = w->top + wi->top - height - 4;
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} else {
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/* ... and lastly if it won't, enable the scroll bar and fit the
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* list in below the widget */
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int avg_height = list_height / (int)list->size();
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int rows = (screen_bottom - 4 - top) / avg_height;
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height = rows * avg_height;
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scroll = true;
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/* Add space for the scroll bar if we automatically determined
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* the width of the list. */
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max_item_width += 12;
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}
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}
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if (auto_width) width = max(width, max_item_width);
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DropdownWindow *dw = new DropdownWindow(
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w->left + wi->left,
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top,
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width,
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height + 4,
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_dropdown_menu_widgets);
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dw->widget[0].colour = wi->colour;
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dw->widget[0].right = width - 1;
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dw->widget[0].bottom = height + 3;
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dw->SetWidgetHiddenState(1, !scroll);
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if (scroll) {
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/* We're scrolling, so enable the scroll bar and shrink the list by
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* the scrollbar's width */
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dw->widget[1].colour = wi->colour;
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dw->widget[1].right = dw->widget[0].right;
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dw->widget[1].left = dw->widget[1].right - 11;
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dw->widget[1].bottom = dw->widget[0].bottom;
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dw->widget[0].right -= 12;
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/* Capacity is the average number of items visible */
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dw->vscroll.cap = height * (uint16)list->size() / list_height;
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dw->vscroll.count = (uint16)list->size();
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}
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dw->desc_flags = WDF_DEF_WIDGET;
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dw->flags4 &= ~WF_WHITE_BORDER_MASK;
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dw->parent_wnd_class = w->window_class;
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dw->parent_wnd_num = w->window_number;
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dw->parent_button = button;
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dw->list = list;
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dw->selected_index = selected;
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dw->click_delay = 0;
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dw->drag_mode = true;
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dw->instant_close = instant_close;
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}
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void ShowDropDownMenu(Window *w, const StringID *strings, int selected, int button, uint32 disabled_mask, uint32 hidden_mask, uint width)
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{
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uint result = 0;
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DropDownList *list = new DropDownList();
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for (uint i = 0; strings[i] != INVALID_STRING_ID; i++) {
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if (!HasBit(hidden_mask, i)) {
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list->push_back(new DropDownListStringItem(strings[i], result, HasBit(disabled_mask, i)));
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}
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result++;
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}
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/* No entries in the list? */
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if (list->size() == 0) {
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DeleteDropDownList(list);
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return;
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}
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ShowDropDownList(w, list, selected, button, width);
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}
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/**
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* Delete the drop-down menu from window \a pw
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* @param pw Parent window of the drop-down menu window
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*/
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int HideDropDownMenu(Window *pw)
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{
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Window *w;
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FOR_ALL_WINDOWS_FROM_BACK(w) {
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if (w->window_class != WC_DROPDOWN_MENU) continue;
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DropdownWindow *dw = dynamic_cast<DropdownWindow*>(w);
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if (pw->window_class == dw->parent_wnd_class &&
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pw->window_number == dw->parent_wnd_num) {
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int parent_button = dw->parent_button;
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delete dw;
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return parent_button;
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}
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}
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return -1;
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}
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