On 03/06/2011 08:50 PM, Robert Schroll wrote:
I'm trying to make a DrawingArea that's anchored in a TextView be able
to receive keyboard focus. I have the pieces - I can make a DrawingArea
that's in a regular container grab focus on being clicked. And I know
that an Entry, e.g., can get focus when anchored in a TextView. But I
haven't been able to make that work for the anchored DrawingArea.
For the record, the solution was embarrassingly simple. The
button_press and key_press handlers for the DrawingArea needed to return
True. I'm guessing this keeps the TextView from getting the events and
grabbing focus right back.
Robert
----
import gtk
class FocusArea(gtk.DrawingArea):
def __init__(self):
gtk.DrawingArea.__init__(self)
self.set_size_request(50,50)
self.set_can_focus(True)
self.add_events(gtk.gdk.BUTTON_PRESS_MASK | gtk.gdk.KEY_PRESS_MASK)
self.connect('key_press_event', self._on_key_press_event)
self.connect('button_press_event', self._on_button_press)
def _on_key_press_event(self, widget, event):
color = {'r': '#f00', 'y': '#ff0', 'g': '#0f0', 'c': '#0ff',
'b': '#00f',
'm': '#f0f'}.get(event.string, '#000')
gc = self.window.new_gc()
gc.set_foreground(self.get_colormap().alloc_color(color))
self.window.draw_rectangle(gc, True, 10, 10, 30, 30)
return True
def _on_button_press(self, widget, event):
print "Click!"
self.grab_focus()
return True
view = gtk.TextView()
buf = view.get_buffer()
view.set_size_request(300,300)
buf.insert_at_cursor("Does get focus: ")
iter = buf.get_iter_at_mark(buf.get_insert())
anchor = buf.create_child_anchor(iter)
widget = FocusArea()
widget.show()
view.add_child_at_anchor(widget, anchor)
buf.insert_at_cursor("\nDoes get focus: ")
iter = buf.get_iter_at_mark(buf.get_insert())
anchor = buf.create_child_anchor(iter)
widget = gtk.Entry()
widget.show()
view.add_child_at_anchor(widget, anchor)
da = FocusArea()
vbox = gtk.VBox()
vbox.pack_start(view, True, True)
vbox.pack_start(da, True, True)
win = gtk.Window()
win.add(vbox)
win.connect("delete-event", gtk.main_quit)
win.show_all()
gtk.main()
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