On Wed, Mar 21, 2007 at 03:50:44PM +0800, s88 wrote: > I have some questions when I using the drawable area with the > gtk+2.0. > First, I'm building a data analyzer under thr Linux, so there is a process > to generate the data and my analyzer display the data. > My idea is to use a drawable area(I use the GtkDrawingArea) and get the pix > buffer of it by the gdk_pixbuf_get_from_drawable(), There is no such thing as `the pixbuf of it'. Every time you call gdk_pixbuf_get_from_drawable() a new image of the drawable is created and put to the pixbuf. Read the first paragraph of gdk_pixbuf_get_from_drawable() description. And if parts of the drawable are obscured, you get garbage there -- see paragraphs 5 and 6. And the other paragraphs too. > then my background > program can fill the pix buffer pix by pix. You can do anything you wish with the pixbuf, but it will have no effect on the widget. > Question 2: the following code segment is what I done until now...what > should I do? If you want to display a pixbuf, just create a pixbuf with gdk_pixbuf_new(), fill its contents and draw it with gdk_draw_pixbuf() in the expose event of the widget. Yeti -- http://gwyddion.net/ _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
