Right mouse menu causes FXList to keep scrolling

[Ronald Pijnacker]

Hi all,

The user interface of an application of mine has a couple of
FXLists that are filled enough to get a scroll-bar.
I added a right-mouse pop-up menu to these lists as follows:

    @list.connect(SEL_RIGHTBUTTONPRESS) do |sender, sel, data|
        menu = FXMenuPane.new(@list)
        FXMenuCommand.new(menu, "Some entry") do |mc|
            mc.connect(SEL_COMMAND) { do_something }
        end
        menu.create
        menu.popup(nil, data.root_x, data.root_y)
        getApp().runModalWhileShown(menu)
    end

The pop-up menu works without problems, but when I invoke it
the underlying list keeps scrolling, even with no buttons pressed.

Any ideas?

Ronald
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[Lyle Johnson-4]

On Jun 24, 2009, at 2:50 AM, Ronald Pijnacker wrote:

> The user interface of an application of mine has a couple of
> FXLists that are filled enough to get a scroll-bar.
> I added a right-mouse pop-up menu to these lists as follows:

<snip>

> The pop-up menu works without problems, but when I invoke it
> the underlying list keeps scrolling, even with no buttons pressed.

One of the "hidden" features of FXList is that you can click and drag  
with the right mouse button to scroll the list's contents up and down  
(instead of using the scroll bar). I suspect that your override of the  
SEL_RIGHTBUTTONPRESS message is somehow interacting with this feature.  
What happens if you add a call to ungrab() at the end of the event  
handler block, e.g.

        @list.connect(SEL_RIGHTBUTTONPRESS) do |sender, sel, data|
                # ... everything as before ...
                @list.ungrab
        end

Another thing you could try is changing the connect() to match on  
SEL_RIGHTBUTTONRELEASE, although may cause the same problem as  
SEL_RIGHTBUTTONPRESS is.

Hope this helps,

Lyle
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[Ronald Pijnacker]

>
> On Jun 24, 2009, at 2:50 AM, Ronald Pijnacker wrote:
>
>> The user interface of an application of mine has a couple of
>> FXLists that are filled enough to get a scroll-bar.
>> I added a right-mouse pop-up menu to these lists as follows:
>
> <snip>
>
>> The pop-up menu works without problems, but when I invoke it
>> the underlying list keeps scrolling, even with no buttons pressed.
>
> One of the "hidden" features of FXList is that you can click and drag with
> the right mouse button to scroll the list's contents up and down (instead
> of using the scroll bar). I suspect that your override of the
> SEL_RIGHTBUTTONPRESS message is somehow interacting with this feature. What
> happens if you add a call to ungrab() at the end of the event handler
> block, e.g.
>
> @list.connect(SEL_RIGHTBUTTONPRESS) do |sender, sel, data|
> # ... everything as before ...
> @list.ungrab
> end

Great! This works.
Thanks a lot Lyle. This was getting to quite annoying.

Ronald
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