Function SetWindowWidgetDirty

src/window.cpp:3192–3199

* Mark a particular widget in a particular window as dirty (in need of repainting) * @param cls Window class * @param number Window number in that class * @param widget_index Index number of the widget that needs repainting */

 * @param widget_index Index number of the widget that needs repainting
 */
void SetWindowWidgetDirty(WindowClass cls, WindowNumber number, WidgetID widget_index)
{
	for (const Window *w : Window::Iterate()) {
		if (w->window_class == cls && w->window_number == number) {
			w->SetWidgetDirty(widget_index);
		}
	}
}

/**
 * Mark all windows of a particular class as dirty (in need of repainting)