Re: Goocanvas::Widget - embedded widget events

["Gian Mario Tagliaretti" <gianmt gnome org>]

On Mon, Nov 10, 2008 at 11:11 PM, Robert Gruendler <doobre gmail com> wrote:

> i'm trying to handle events dispatched by the embedded widgets in a
> Goocanvas::Widget, but my callback function doesn't get called:

Weird, it works from python

import sys
import gtk
import goocanvas

def main(argv):
    window = gtk.Window()
    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.
    item = goocanvas.Rect(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")
    root.add_child(item, 0)
    item.connect("button-press-event", on_rect_button_press)

    item = goocanvas.Text(text="Hello World",
                          x=300, y=300,
                          anchor=gtk.ANCHOR_CENTER,
                          font="Sans 24")
    root.add_child(item, 1)
    item.rotate(45, 300, 300)

    def on_click(widget):
        print "clicked on ", widget

    button = gtk.Button("Sample button")
    wid = goocanvas.Widget(parent=root,
                           widget = button,
                           x=300, y=300)
    button.connect("clicked", on_click)

    gtk.main()

## This handles button presses in item views. We simply output a message to
##   the console.
def on_rect_button_press (view, target, event):
    print "rect item received button press event"
    return True


## 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. */
def on_delete_event(window, event):
    raise SystemExit


if __name__ == "__main__":
    main(sys.argv)


cheers
-- 
Gian Mario Tagliaretti
GNOME Foundation member
gianmt gnome org