Function GUI_Widget_Scrollbar_Draw

src/gui/widget_draw.c:362–416

* Draw a scrollbar widget to the display, relative to its parent. * * @param w The widget (which is a scrollbar) to draw. */

 * @param w The widget (which is a scrollbar) to draw.
 */
void GUI_Widget_Scrollbar_Draw(Widget *w)
{
	WidgetScrollbar *scrollbar;
	uint16 positionX, positionY;
	uint16 width, height;
	uint16 scrollLeft, scrollTop;
	uint16 scrollRight, scrollBottom;

	if (w == NULL) return;
	if (w->flags.invisible) return;

	scrollbar = w->data;

	width  = w->width;
	height = w->height;

	positionX = w->offsetX;
	if (w->offsetX < 0) positionX += g_widgetProperties[w->parentID].width << 3;
	positionX += g_widgetProperties[w->parentID].xBase<< 3;

	positionY = w->offsetY;
	if (w->offsetY < 0) positionY += g_widgetProperties[w->parentID].height;
	positionY += g_widgetProperties[w->parentID].yBase;

	if (width > height) {
		scrollLeft   = scrollbar->position + 1;
		scrollTop    = 1;
		scrollRight  = scrollLeft + scrollbar->size - 1;
		scrollBottom = height - 2;
	} else {
		scrollLeft   = 1;
		scrollTop    = scrollbar->position + 1;
		scrollRight  = width - 2;
		scrollBottom = scrollTop + scrollbar->size - 1;
	}

	if (GFX_Screen_IsActive(SCREEN_0)) {
		GUI_Mouse_Hide_InRegion(positionX, positionY, positionX + width - 1, positionY + height - 1);
	}

	/* Draw background */
	GUI_DrawFilledRectangle(positionX, positionY, positionX + width - 1, positionY + height - 1, w->bgColourNormal);

	/* Draw where we currently are */
	GUI_DrawFilledRectangle(positionX + scrollLeft, positionY + scrollTop, positionX + scrollRight, positionY + scrollBottom, (scrollbar->pressed == 0) ? w->fgColourNormal : w->fgColourSelected);

	if (GFX_Screen_IsActive(SCREEN_0)) {
		GUI_Mouse_Show_InRegion();
	}

	/* Call custom callback function if set */
	if (scrollbar->drawProc != NULL) scrollbar->drawProc(w);

	scrollbar->dirty = 0;
}

/**
 * Gets the action type used to determine how to draw the panel on the right side of the screen.