Thanks for replying Ian.
I tried something like this yesterday, but I couldn't move the cursor
past the OK button (I'm using the up/down keys to move the cursor and
ignoring the mouse for now). Disabling the OK button puts the enabled
Cancel out of each unless I use the mouse.
Here's the code:
import urwid
class DisabledButton(urwid.Button):
def __init__(self, text):
self.__super.__init__(text)
def selectable(self):
return False
f1 = urwid.Edit("Field 1: ")
f2 = urwid.Edit("Field 2: ")
f3 = urwid.Edit("Field 3: ")
#ok = urwid.Button("OK")
ok = DisabledButton("OK")
cancel = urwid.Button("Cancel")
gf = urwid.GridFlow([ok, cancel], 10, 10, 0, "center")
pile = urwid.Pile([
f1,
f2,
f3,
urwid.Divider(),
gf
])
fill = urwid.Filler(pile, valign="top")
loop = urwid.MainLoop(fill)
loop.run()
On a related point - is it easy to make the tab key cycle the selected
widget?
Thanks,
Yasir
Yasir Assam wrote:
ok = urwid.Button("OK")
[...]
I want to be able to disable the OK button depending on what's being
input. By "disable" I stopping the cursor from moving it to it when I
use the arrow keys to move focus around.
Is there an easy way to do this?
Yes, the selectable() method on widgets determines whether the cursor
will move to a widget, so you could make a Button subclass that returns
False from selectable() when the button should not be selectable.
You will also have to intercept mouse clicks for it to be a complete
solution. Look at the code for the Button class, it's not very complicated.
http://excess.org/urwid/browser/urwid/wimp.py#L412
Ian
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