gtkWidgetSetRedrawOnAllocate {RGtk2} | R Documentation

## gtkWidgetSetRedrawOnAllocate

### Description

Sets whether the entire widget is queued for drawing when its size allocation changes. By default, this setting is `TRUE` and the entire widget is redrawn on every size change. If your widget leaves the upper left unchanged when made bigger, turning this setting off will improve performance.

### Usage

    gtkWidgetSetRedrawOnAllocate(object, redraw.on.allocate)

### Arguments

``object`` | a `GtkWidget`
``redraw.on.allocate`` | if `TRUE`, the entire widget will be redrawn when it is allocated to a new size. Otherwise, only the new portion of the widget will be redrawn.

### Details

Note that for `NO_WINDOW` widgets setting this flag to `FALSE` turns off all allocation on resizing: the widget will not even redraw if its position changes; this is to allow containers that don't draw anything to avoid excess invalidations. If you set this flag on a `NO_WINDOW` widget that does draw on `widget->window`, you are responsible for invalidating both the old and new allocation of the widget when the widget is moved and responsible for invalidating regions newly when the widget increases size.

### Author(s)

Derived by RGtkGen from GTK+ documentation

[Package RGtk2 version 2.20.40 Index]