Hi Tomeu, Thanx for your reply. I tried this as well, but doesn't seems to work. Here is my code-- http://pastebin.be/20215 , where get_preview2() is similar to get_preview fn and it returns in a similar manner. This is the get preview2 fn--- http://pastebin.be/20216 . The log error can be found at --- http://pastebin.be/20214 . Kindly give your suggestions.
Regards, VIJIT On Thu, Aug 6, 2009 at 1:15 PM, Tomeu Vizoso<to...@sugarlabs.org> wrote: > On Wed, Aug 5, 2009 at 13:05, sumit singh<sumit.co...@gmail.com> wrote: >> Hi Tomeu, >> >> Thanx for your reply. I tried using the it , but it doesn't seem to >> work, it gives an error that the image should be a gdkpixbuf or None. >> Here is my code- http://pastebin.be/20184 , isn't it so that while >> creating the pixmap on line no15, we are just using the height and >> width of the surface and not the surface anywhere. I mean how are we >> transferring the data of the image to the pixmap. >> Thinking this I also tried this approach but didn't worked---- >> http://pastebin.be/20185 . >> >> Kindly have a look as in where am I doing the mistake. > > Have written some code based on my earlier pointers, but haven't tested it: > > # wrap the png data in a "virtual file" > import StringIO.StringIO > png_file = StringIO.StringIO(preview_data) > > # create a cairo surface with the png data > surface = cairo.ImageSurface.create_from_png(png_file) > > # create a pixmap with the same dimensions > w, h = surface.get_width(), surface.get_height() > pixmap = gtk.gdk.Pixmap (None, w, h, 24) > > # create a cairo graphics context dor drawing into the pixmap > cr = pixmap.cairo_create () > > # paint the surface to the graphics context > cr.set_source_surface (surface, 0, 0) > cr.paint () > > # create an image widget and assign the pixmap to it > im = gtk.Image() > im.set_from_pixmap(pixmap, None) > > You may want to read a bit about pixmaps, pixbufs, etc. Both in the > PyGtk and X11 documentation: > > http://www.pygtk.org/pygtktutorial/sec-pixmaps.html > http://www.pygtk.org/docs/pygtk/class-gdkpixmap.html > http://tronche.com/gui/x/xlib/pixmap-and-cursor/pixmap.html > > HTH, > > Tomeu > >> Regards, >> sumit >> >> On Wed, Aug 5, 2009 at 12:33 PM, Tomeu Vizoso<to...@sugarlabs.org> wrote: >>> On Wed, Aug 5, 2009 at 03:06, sumit singh<sumit.co...@gmail.com> wrote: >>>> Hi all, >>>> >>>> I would like to ask what is the best way to get a gtk.Image from the >>>> data returned by get_preview function of activity.Activity fn of >>>> sugar. I want to make an image buttton using this data. Currently, I >>>> am doing it by saving the data in a temp file using the tempfile >>>> module of sugar and then by loading the image from this file, however, >>>> as I will be req to load around 15-20 such images, I can't say how >>>> fast the process will end into. Is there a faster method? >>>> >>>> For your reference , here is the code of how the journal activity uses >>>> this data---- http://pastebin.be/20177 , but as I don't want to use >>>> hippo canvas, so this method won't work. Kindly give your suggestions. >>> >>> Sorry, didn't remembered that the journal used hippo to display the >>> previews when I recommended you to look at that. >>> >>> If you get a cairo surface like the journal does, you can draw it to a >>> pixmap and then tell a gtk.Image to display it. More details in this >>> post (disregard the pixbuf stuff): >>> >>> http://lethalman.blogspot.com/2009/04/create-pixbuf-from-cairo-surface.html >>> >>> HTH, >>> >>> Tomeu >>> >>>> Regards, >>>> sumit >>>> >>> >> > _______________________________________________ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
