Function InitWindowSystem

src/window.cpp:1859–1876

* (re)initialize the windowing system */

 * (re)initialize the windowing system
 */
void InitWindowSystem()
{
	IConsoleClose();

	_focused_window = nullptr;
	_mouseover_last_w = nullptr;
	_last_scroll_window = nullptr;
	_scrolling_viewport = false;
	_mouse_hovering = false;

	SetupWidgetDimensions();
	NWidgetLeaf::InvalidateDimensionCache(); // Reset cached sizes of several widgets.
	NWidgetScrollbar::InvalidateDimensionCache();

	InitDepotWindowBlockSizes();

	ShowFirstError();
}

/**
 * Close down the windowing system