James,
I can't seem to get you very clear suggestions working here. While I'm
having a difficult time getting the gray and green to show at the right
times, the most important problem is that switching the self.buttons.append
call from 0 to 1 doesn't effectively change the initial state.
I'd be much obliged if you could make me a proper gtk.ToggleButton method as
a substitute. Initial state: on, color: green. Toggle to off, color: gray.
Here's the "original" code below for your ready reference. (I presume the
buttcallback method might remain as is?)
def buttcallback(self, widget, data=None):
for i in self.buttons:
if i[0] == widget:
if i[2]:
i[2] = 0
i[0].modify_bg(gtk.STATE_NORMAL,
gtk.gdk.Color(0x8000,0x8000,0x8000, 1))
i[0].modify_bg(gtk.STATE_PRELIGHT,
gtk.gdk.Color(0x8000,0x8000,0x8000, 2))
else:
i[2] = 1
i[0].modify_bg(gtk.STATE_NORMAL, gtk.gdk.Color(0,0x7700,0, 1))
i[0].modify_bg(gtk.STATE_PRELIGHT, gtk.gdk.Color(0,0x7700,0, 2))
self.set_channel(i[1], i[2])
def button(self,box, title="",label=""):
"""Creates a button (on/off)
box: parent box
title: if given, the button name,
which will also be the bus channel
name. Otherwise a default name is
given, BN, where N is button number
in order of creation.
label: if given, an alternative button name,
which will be displayed instead of title
returns the widget instance"""
self.butts = self.butts + 1
if title == "":
title = "B%d" % self.butts
if label == "": name = title
else: name = label
butt = gtk.Button(" %s " % name)
self.scale_font(butt.child)
butt.modify_bg(gtk.STATE_PRELIGHT,
gtk.gdk.Color(0x8000,0x8000,0x8000, 2))
box.pack_start(butt, False, False, 1)
self.buttons.append([butt,title,0])
butt.connect("clicked", self.buttcallback)
butt.show()
return butt
Art Hunkins
----- Original Message -----
From: "James Cameron" <[email protected]>
To: <[email protected]>
Sent: Friday, August 26, 2011 8:11 PM
Subject: Re: [Sugar-devel] gtk.button initial state on?
On Tue, Aug 23, 2011 at 03:00:10PM -0400, Art Hunkins wrote:
In my latest activity (SamplePlay), I've several normal buttons for
which I'd like the initial state to be *on*.
The code is creating a gtk.Button (which has no persistent state) and
then modifying the button background to indicate some sort of internal
persistent state.
(It should instead create a gtk.ToggleButton and use the set_active() and
get_active() methods; it would be much easier to comprehend and change.
But this code is written in a hurry using only the tools known to the
programmer.)
Can someone show me how to modify the code below to achieve this? (The
off state is gray; the on state, green.)
Sure. It is the butt.modify_bg call when the button is created that is
responsible for showing the gray. It is the 0 in self.buttons.append
that is responsible for setting the initial state off.
(The programmer has taken control of how to show the button state).
So you might change the butt.modify_bg call, and the self.buttons.append
call. Change the butt.modify_bg call by adopting the colour green, in
the same way as you can see in buttcallback. Change the
self.buttons.append call by switching from 0 to 1 in the last list
value.
--
James Cameron
http://quozl.linux.org.au/
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