custom Tkinter ListBox selectMode

[Ron Provost]

Hello,

I've written a simple GUI which contains a listbox to hold some information.
I've found that the click-selection schemes provided by Tkinter are
insufficient for my needs. Essentiall I need to impletement a custom
selectMode. As a first go, I've attempted to implement a click-on-click-off
mode. So for each entry, a click on that entry toggels its selection mode.
A click on any entry does not affect the selection mode of any other entry.

I attempted to implement this by binding

myListBoxWidget.bind( '<ButtonRelease-1>', self.itemClicked )

Where my itemClicked() method determines which item was clicked on then
toggels it's selection state.




So, what's my problem? Well, it doesn't work. The SINGLE selectMode
(default) seems to always take over. I'm tempted to set a simple timer
callback for a short duration which redoes the selection set after the
built-in hander has had a chance to do its thing, but that seems like such a
kludge to me. Any suggestions on how I can implement a custom selectMode?

Thanks for your input.

Ron

 

[Eric Brunel]

Hello,

I've written a simple GUI which contains a listbox to hold some information.
I've found that the click-selection schemes provided by Tkinter are
insufficient for my needs. Essentiall I need to impletement a custom
selectMode. As a first go, I've attempted to implement a click-on-click-off
mode. So for each entry, a click on that entry toggels its selection mode.
A click on any entry does not affect the selection mode of any other entry.

What you describe is exactly the behavior you get when you set selectmode='multiple' on a list box; see:
http://www.tcl.tk/man/tcl8.3/TkCmd/listbox.htm#M57

HTH