[pygtk] Need ToolButton to only be sensitive when TreeView has a selection

[Timo]

On 31-08-10 01:49, Robert Park wrote:
> D'oh, looks like I asked for help a bit too soon. Got it working with this gem:
>
> self.treeview.get_selection().connect("changed", lambda x:
> self.apply_button.set_sensitive(self.treeview.get_selection().count_selected_rows()
>    
>> 0))
>>      
> Although it's a bit unwieldy. Any thoughts on simplifying this?
>    
I always do it like this:

self.selection = self.treeview.get_selection()
self.selection.connect('changed', self.selection_changed)

def selection_changed(self, selection):
     model, tree_iter = selection.get_selected()
     if tree_iter is None:
         self.apply_button.set_sensitive(False)
     else:
         self.apply_button.set_sensitive(True)


Cheers,
Timo

> Thanks guys!
>
> On Mon, Aug 30, 2010 at 5:33 PM, Robert Park<rbpark at exolucere.ca>  wrote:
>    
>> Hi guys, another simple one today.
>>
>> I have a button that acts upon selected items in a TreeView/ListStore,
>> so I'd like for this button to be disabled when there are no
>> selections in my TreeView. So far I have this code:
>>
>>                 self.apply_button = gtk.ToolButton(gtk.STOCK_APPLY)
>>                 self.apply_button.set_sensitive(False) #Defaults unsensitive because
>> nothing will be selected when app loads
>>                 ...
>>                 self.treeview.connect("select-cursor-row", lambda x, y:
>> self.apply_button.set_sensitive(True))
>>
>> So what this does is that if I click on a row in the TreeView and then
>> press the Enter key on my keyboard, the apply button becomes
>> sensitive. What I want is to have it simply become sensitive as soon
>> as the selection is clicked, but I've been reading through the
>> reference manuals and I just can't seem to find the right signal name
>> for this. selection-received and selection-request-event seemed like
>> the obvious choices for this but they don't seem to work.
>>
>> Also, I'm gonna need to know how to again de-sensitize the button
>> after the selection is cleared.
>>
>> Thanks in advance guys.
>>
>> --
>> http://exolucere.ca
>>
>>      
>
>
>