Sets the area of the widget, where the contents of this tooltip apply, to be rect (in widget coordinates). This is especially useful for properly setting tooltips on #GtkTreeView rows and cells, #GtkIconViews, etc.
For setting tooltips on #GtkTreeView, please refer to the convenience functions for this: gtk.tree_view.TreeView.setTooltipRow and gtk.tree_view.TreeView.setTooltipCell.
a #GdkRectangle
Sets the area of the widget, where the contents of this tooltip apply, to be rect (in widget coordinates). This is especially useful for properly setting tooltips on #GtkTreeView rows and cells, #GtkIconViews, etc.
For setting tooltips on #GtkTreeView, please refer to the convenience functions for this: gtk.tree_view.TreeView.setTooltipRow and gtk.tree_view.TreeView.setTooltipCell.