Function DrawOutline

src/widget.cpp:840–845

bool _draw_widget_outlines;

static void DrawOutline(const Window *, const NWidgetBase *wid)
{
	if (!_draw_widget_outlines || wid->current_x == 0 || wid->current_y == 0) return;

	DrawRectOutline(wid->GetCurrentRect(), PC_WHITE, 1, 4);
}

/**
 * @defgroup NestedWidgets Hierarchical widgets