On Mon, Mar 10, 2008 at 10:09 AM, Victor Lazzarini
<[EMAIL PROTECTED]> wrote:
> what would be the best bet for going about implementing
> structured graphics a-la Tkinter's canvas class in XO
> activities? Would it be PyCairo? or PyGTK (gtk/gdk)?
>
> also could anyone point to a PyGTK custom widget
> tutorial somewhere? I had a look at one in
> http://www.learningpython.com/2006/07/25/writing-a-custom-widget-using-pygtk/
>
> but the code wouldn't work. Are there others?
goocanvas is another option; it's what I used for my icon-editor activity.
Attached is the goocanvas 'hello, world' activity using goocanvas'
python bindings.
--scott
--
( http://cscott.net/ )
#!/usr/bin/python2.5
"""Translate the example in goocanvas' manual into python."""
import gtk
import goocanvas
import sys
def on_delete_event(widget, event, data=None):
"""This is our handler for the "delete-event" signal of the
window, which is emitted when the 'x' close button is clicked. We
just exit here."""
sys.exit(0)
def on_rect_button_press(item, target, event, data=None):
"""This handles button presses in item views. We simply output a
message to the console."""
print "rect item received button press!"
return True
def main():
window = gtk.Window(gtk.WINDOW_TOPLEVEL)
window.set_default_size(640, 600)
window.show()
window.connect('delete_event', on_delete_event)
scrolled_win = gtk.ScrolledWindow()
scrolled_win.set_shadow_type (gtk.SHADOW_IN)
scrolled_win.show()
window.add(scrolled_win)
canvas = goocanvas.Canvas()
canvas.set_size_request(600, 450)
canvas.set_bounds(0,0,1000,1000)
canvas.show()
scrolled_win.add(canvas)
root = canvas.get_root_item()
# Add a few simple items.
rect_item = goocanvas.Rect(parent=root,
x=100, y=100, width=400, height=400,
line_width=10.0, radius_x=20.0,
radius_y=10.0, stroke_color='yellow',
fill_color='red')
text_item = goocanvas.Text (parent=root, text="Hello World", x=300, y=300,
anchor=gtk.ANCHOR_CENTER, font='Sans 24')
text_item.rotate(45, 300, 300)
# Connect a signal handler for the rectangle item.
rect_item.connect('button_press_event', on_rect_button_press)
# Pass control to the GTK+ main event loop.
gtk.main()
if __name__=='__main__':
main()
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