Function DrawVehicleRefitWindow

src/vehicle_gui.cpp:691–742

* Draw the list of available refit options for a consist and highlight the selected refit option (if any). * @param refits Available refit options for each (sorted) cargo. * @param sel Selected refit option in the window * @param pos Position of the selected item in caller widow * @param rows Number of rows(capacity) in caller window * @param delta Step height in caller window * @param

 * @param r     Rectangle of the matrix widget.
 */
static void DrawVehicleRefitWindow(const RefitOptions &refits, const RefitOption *sel, uint pos, uint rows, uint delta, const Rect &r)
{
	Rect ir = r.Shrink(WidgetDimensions::scaled.matrix);
	uint current = 0;

	bool rtl = _current_text_dir == TD_RTL;
	uint iconwidth = std::max(GetSpriteSize(SPR_CIRCLE_FOLDED).width, GetSpriteSize(SPR_CIRCLE_UNFOLDED).width);
	uint iconheight = GetSpriteSize(SPR_CIRCLE_FOLDED).height;
	PixelColour linecolour = GetColourGradient(COLOUR_ORANGE, SHADE_NORMAL);

	int iconleft   = rtl ? ir.right - iconwidth     : ir.left;
	int iconcenter = rtl ? ir.right - iconwidth / 2 : ir.left + iconwidth / 2;
	int iconinner  = rtl ? ir.right - iconwidth     : ir.left + iconwidth;

	Rect tr = ir.Indent(iconwidth + WidgetDimensions::scaled.hsep_wide, rtl);

	/* Draw the list of subtypes for each cargo, and find the selected refit option (by its position). */
	for (const auto &pair : refits) {
		bool has_subtypes = pair.second.size() > 1;
		for (const RefitOption &refit : pair.second) {
			if (current >= pos + rows) break;

			/* Hide subtypes if selected cargo type does not match */
			if ((sel == nullptr || sel->cargo != refit.cargo) && refit.subtype != UINT8_MAX) continue;

			/* Refit options with a position smaller than pos don't have to be drawn. */
			if (current < pos) {
				current++;
				continue;
			}

			if (has_subtypes) {
				if (refit.subtype != UINT8_MAX) {
					/* Draw tree lines */
					int ycenter = tr.top + GetCharacterHeight(FS_NORMAL) / 2;
					GfxDrawLine(iconcenter, tr.top - WidgetDimensions::scaled.matrix.top, iconcenter, (&refit == &pair.second.back()) ? ycenter : tr.top - WidgetDimensions::scaled.matrix.top + delta - 1, linecolour);
					GfxDrawLine(iconcenter, ycenter, iconinner, ycenter, linecolour);
				} else {
					/* Draw expand/collapse icon */
					DrawSprite((sel != nullptr && sel->cargo == refit.cargo) ? SPR_CIRCLE_UNFOLDED : SPR_CIRCLE_FOLDED, PAL_NONE, iconleft, tr.top + (GetCharacterHeight(FS_NORMAL) - iconheight) / 2);
				}
			}

			TextColour colour = (sel != nullptr && sel->cargo == refit.cargo && sel->subtype == refit.subtype) ? TC_WHITE : TC_BLACK;
			/* Get the cargo name. */
			DrawString(tr, GetString(STR_JUST_STRING_STRING, CargoSpec::Get(refit.cargo)->name, refit.string), colour);

			tr.top += delta;
			current++;
		}
	}
}

/** Refit cargo window. */
struct RefitWindow : public Window {