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cairoDevice (version 2.5)

asCairoDevice: Converting GTK+ widgets to Cairo graphics devices

Description

Allows one to convert an arbitrary realized GTK+ widget (usually a GtkDrawingArea) or a GdkDrawable (like a GdkPixmap) to a Cairo graphics device, so that R plot commands draw to the widget/drawable.

Usage

asCairoDevice(widget, pointsize = 10)

Arguments

widget
The realized widget or drawable to which the R graphics are drawn
pointsize
The default font size in the R plot

Details

The main purpose of this function is to allow the user to embed an R plot in a GTK user interface constructed with RGtk2. Please see the examples in the RGtk2 package. Drawing to an offscreen GdkPixmap is useful for buffering and transforming R graphics. For example, one could copy the pixmap to a GdkPixbuf and add a watermark before saving as a gif, png, jpg, etc.

References

http://www.ggobi.org/rgtk2 http://www.gtk.org/ http://www.cairographics.org/