Method SetCapacityFromWidget

src/widget.cpp:2527–2535

* Set capacity of visible elements from the size and resize properties of a widget. * @param w Window. * @param widget Widget with size and resize properties. * @param padding Padding to subtract from the size. * @note Updates the position if needed. */

 * @note Updates the position if needed.
 */
void Scrollbar::SetCapacityFromWidget(Window *w, WidgetID widget, int padding)
{
	NWidgetBase *nwid = w->GetWidget<NWidgetBase>(widget);
	if (this->IsVertical()) {
		this->SetCapacity(((int)nwid->current_y - padding) / (int)nwid->resize_y);
	} else {
		this->SetCapacity(((int)nwid->current_x - padding) / (int)nwid->resize_x);
	}
}

/**
 * Apply 'scroll' to a rect to be drawn in.