Hi John,
Thanks for the input.
I tried what was recommended, using a DrawingArea.window as the drawable, drawing to
this, and then get_from_drawable to the pixbuf. I display the DrawingArea to another
window and the line shows up fine. The window displaying the derived pixbuf doesn't
show it... The code follows (python 2.2, gtk 2.0):
#!/usr/bin/env python
import sys, pygtk
pygtk.require("2.0")
import gtk
def delete_event(win, event=None):
gtk.mainquit()
def expose_handler(widget, *args):
#print "widget e_h", widget, args
gc=widget.window.new_gc()
colormap=widget.get_colormap()
red=colormap.alloc_color("red")
alloc=widget.get_allocation()
x0=alloc[0]
y0=alloc[1]
x1=alloc[2]
y1=alloc[3]
#print "x0",x0,"y0",y0,"x1",x1,"y1",y1
gc.set_foreground(red)
widget.window.draw_line(gc,x0,y0,x1,y1)
def do_display(pixbuf, name):
win=gtk.Window()
win.connect("delete_event",delete_event)
win.set_title(name)
box=gtk.VBox()
win.add(box)
swin=gtk.ScrolledWindow()
box.pack_start(swin, gtk.TRUE, gtk.TRUE, 0)
image=gtk.Image()
image.set_from_pixbuf(pixbuf)
swin.add_with_viewport(image)
win.set_default_size(600,480)
win.show_all()
# window to hold drawable
window=gtk.Window()
# drawingarea used to draw graphics to be exported to pixbuf
drawingarea=gtk.DrawingArea()
drawingarea.set_size_request(1000,1000)
drawingarea.connect("expose-event",expose_handler)
window.add(drawingarea)
window.show_all()
#window.hide()
# get ready to draw graphics
drawable=drawingarea.window
colormap=drawable.get_colormap()
red=colormap.alloc_color("red")
print drawingarea.get_parent_window()
#drawingarea.set_size_request(1000,1000)
#alloc=drawingarea.get_allocation()
#print alloc[0],alloc[1],alloc[2],alloc[3]
gc=drawable.new_gc()
gc.set_foreground(red)
drawable.draw_line(gc,0,0,1000,1000)
# create pixbuf and transfer data to it
pixbuf=gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB,0,8,1000,1000)
pixbuf=pixbuf.get_from_drawable(drawable,colormap,0,0,0,0,1000,1000)
print "height", pixbuf.get_height()
fname="Test"
# display pixbuf in scrolled window
do_display(pixbuf,fname)
gtk.mainloop()
On Wed, 21 Jan 2004 21:34:17 -0600
John Hunter <[EMAIL PROTECTED]> wrote:
> >>>>> "Luc" == Luc Lefebvre <[EMAIL PROTECTED]> writes:
>
> Luc> I would like to set the contents of the pixbuf with
> Luc> draw_lines from a series of points. There has to be a way of
> Luc> doing this but I've been reading for a few days and trying
> Luc> things, and have managed to get myself even more confused.
>
> Sorry, this is off the cuff, but here's the basic idea
>
> Draw to a gtk.gdk.Drawable as usual
>
> drawable.draw_lines(gc, zip(x, y))
>
> Then draw to the pixbuf from the drawable
>
> pixbuf = gtk.gdk.Pixbuf(gtk.gdk.COLORSPACE_RGB, 0, 8, width, height)
> pixbuf.get_from_drawable(
> drawable, drawable.get_colormap(), 0, 0, 0, 0, width, height)
>
> Hope this helps,
> JDH
--
Luc Lefebvre
In the beginner's mind there are many possibilities,
in the expert's mind there are few. <Shunryu Suzuki>
Key fingerprint = D2E5 5E35 B910 6F4E 0242 EC63 0FD9 96D0 C7F4 784E
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