wxWidgets Discussion Forum

Hello,

I have a wxListBox and basically I want to be able to click items and if it is selected then deselect it and if it is deselected then it should be selected.

How can I do this without having to hold down the control key?

Thanks in advance!

Hi,
RTFM - in here.

Thank you.

Thank you for the reply however that does not really help me.

I already have wxLB_MULTIPLE and I CAN hold the ctl key down and select multiple items. My question is, how can I create this functionality WITHOUT having to hold ctl.

I already have wxLB_MULTIPLE and I CAN hold the ctl key down and select multiple items. My question is, how can I create this functionality WITHOUT having to hold ctl.

Platform, wxWidgets version?

With wxLB_MULTIPLE you should get the behavior you want. I checked with the "widgets" sample under Windows. Did you maybe set both wxLB_MULTIPLE and wxLB_EXTENDED?

I believe that ONEEYEMAN meant that you may need to do this yourself, handling wxEVT_LISTBOX and de/selecting items based on their state and control keys pressed.

BTW, what about using wxCheckListBox instead: many users find selecting multiple items using <Ctrl> or <Shift> difficult, some may not even be aware that such a thing is possible...

Hi,
@PB: There is no special handling is required to get the desired behaviour (at least when you are on Windows).
@OP: Check that you are not set an extended style for the control. Also see if you can reproduce this in the widgets sample.
And of course it would be nice to know the answers to doublemax' questions...

Thank you.

Oops, sorry I had no idea that this is supported out of the box.

Hi, PB,
On Windows it is. In order to have a Ctrl+click behavior, you should set an extended style, which OP doesn't want.

But on GTK, things will be different. Setting wxLB_MULTIPLE will produce the behavior of wxLB_MULTIPLE + wxLB_EXTENDED, because GTK+ does not support multiple selection with just mouse clicks. So, on *nix it doesn't matter whether you set wxLB_EXTENDED or not - you will still get this behaviour as it is a native control.

OSX, however, behaves as MSW, I think (not at home and can't verify). You will get multiple selections with just clicks and you have to have wxLB_EXTENDED in order to get Ctrl+mouse clicks.

My guess would be that wxLB_EXTENDED style was created to have MSW/OSX behave the same as GTK+ although on MSW there is a style that supports this behaviour.

That's why it would be interesting to know what platform the OP is using (as you know most people doesn't read the docs )

Thank you.

doublemax wrote:

I already have wxLB_MULTIPLE and I CAN hold the ctl key down and select multiple items. My question is, how can I create this functionality WITHOUT having to hold ctl.

Platform, wxWidgets version?

With wxLB_MULTIPLE you should get the behavior you want. I checked with the "widgets" sample under Windows. Did you maybe set both wxLB_MULTIPLE and wxLB_EXTENDED?

Hello and thank you for the reply.

its on linux and wxwidgets 3.0

I tried to select wxLB_MULTIPLE and wxLB_EXTENDED but this did not work.

I want the functionality WITHOUT holding the ctrl key down. It works while holding ctl down. Is there any way to get this without having the user hold down ctrl?

Hi,
The behaviour you want is not supported by GTK (underlying toolkit).

There is nothing that can be done about it unfortunately.

Thank you.

P.S.: You can try to use generic wxListBox to get the behaviour you want...

What you could try: Catch the "normal" wxEVT_LEFT_DOWN event, use wxListBox::HitTest to find the item under the mouse (if any), and then toggle its selection status yourself.

Would using a wxCheckListBox work.