--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/widget.cpp Wed Jan 10 18:12:09 2007 +0000
@@ -0,0 +1,700 @@
+/* $Id$ */
+
+#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, 0x322 | 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 : 0);
+
+ /* show different image when clicked for WWT_IMGBTN_2 */
+ if ((wi->type & WWT_MASK) == WWT_IMGBTN_2 && clicked) img++;
+ DrawSprite(img, 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 : 0);
+ goto draw_default;
+ }
+
+ case WWT_TEXTBTN:
+ case WWT_TEXTBTN_2: {
+ DrawFrameRect(r.left, r.top, r.right, r.bottom, wi->color, (clicked) ? FR_LOWERED : 0);
+ }
+ /* 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 : 0);
+
+ 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 : 0);
+ 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 : 0);
+ 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 | 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 : 0);
+ 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 : 0);
+ 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 : 0);
+ 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 | 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 : 0);
+ 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 : 0);
+ DrawSprite(SPR_ARROW_LEFT, 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 : 0);
+ DrawSprite(SPR_ARROW_RIGHT, 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 | 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 : 0);
+
+ 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 : 0);
+ DrawSprite((clicked) ? SPR_PIN_UP : SPR_PIN_DOWN, 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 : 0);
+ DrawSprite(SPR_WINDOW_RESIZE, 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, 0);
+ 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] | 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,
+ 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;
+}