Rect FalagardListbox::getListRenderArea(void) const
{
Listbox* lb = (Listbox*)d_window;
// get WidgetLookFeel for the assigned look.
const WidgetLookFeel& wlf = getLookNFeel();
bool v_visible = lb->getVertScrollbar()->isVisible(true);
bool h_visible = lb->getHorzScrollbar()->isVisible(true);
// if either of the scrollbars are visible, we might want to use another text rendering area
if (v_visible || h_visible)
{
String area_name("ItemRenderingArea");
if (h_visible)
{
area_name += "H";
}
if (v_visible)
{
area_name += "V";
}
area_name += "Scroll";
if (wlf.isNamedAreaDefined(area_name))
{
return wlf.getNamedArea(area_name).getArea().getPixelRect(*lb);
}
}
// default to plain ItemRenderingArea
return wlf.getNamedArea("ItemRenderingArea").getArea().getPixelRect(*lb);
}
void FalagardListbox::render()
{
Listbox* lb = (Listbox*)d_window;
// render frame and stuff before we handle the items
cacheListboxBaseImagery();
//
// Render list items
//
Vector3 itemPos;
Size itemSize;
Rect itemClipper, itemRect;
float widest = lb->getWidestItemWidth();
// calculate position of area we have to render into
Rect itemsArea(getListRenderArea());
// set up some initial positional details for items
itemPos.d_x = itemsArea.d_left - lb->getHorzScrollbar()->getScrollPosition();
itemPos.d_y = itemsArea.d_top - lb->getVertScrollbar()->getScrollPosition();
itemPos.d_z = System::getSingleton().getRenderer()->getZLayer(3) - System::getSingleton().getRenderer()->getCurrentZ();
float alpha = lb->getEffectiveAlpha();
// loop through the items
size_t itemCount = lb->getItemCount();
for (size_t i = 0; i < itemCount; ++i)
{
ListboxItem* listItem = lb->getListboxItemFromIndex(i);
itemSize.d_height = listItem->getPixelSize().d_height;
// allow item to have full width of box if this is wider than items
itemSize.d_width = ceguimax(itemsArea.getWidth(), widest);
// calculate destination area for this item.
itemRect.d_left = itemPos.d_x;
itemRect.d_top = itemPos.d_y;
itemRect.setSize(itemSize);
itemClipper = itemRect.getIntersection(itemsArea);
// skip this item if totally clipped
if (itemClipper.getWidth() == 0)
{
itemPos.d_y += itemSize.d_height;
continue;
}
// draw this item
listItem->draw(lb->getRenderCache(), itemRect, itemPos.d_z, alpha, &itemClipper);
// update position ready for next item
itemPos.d_y += itemSize.d_height;
}
}
