[Gambas-user] Does ListBox ''_MouseDown()" Event work ?

[Bruce Steers]

On Fri, 8 Dec 2023 at 13:13, Benoît Minisini <
benoit.minisini at gambas-basic.org> wrote:

> Le 08/12/2023 à 14:06, T Lee Davidson a écrit :
> > On 12/7/23 20:13, vuott--- via User wrote:
> >> Hello,
> >> the ListBox ''_MouseDown()" Event does not work for me.
> >>
> >>
> >> [System]
> >> Gambas=3.18.90 38b49c0 (master)
> > [snip]
> >
> > The issue exists with v3.18.4 as well. Interestingly, a double-click
> > triggers the MouseDown event with both Qt5 and GTK3.
> >
>
> Compound non-native controls usually eat some of the low-level events.
>
> You should normally never try to handle low-level events on complex
> controls.
>
> Regards,
>
> --
> Benoît Minisini.
>

We can always access the inner parts of complex controls, something like
this...

' Gambas class file

Public Sub Form_Open()

  Dim hobs As Observer = New Observer(ListBox1.Children[0]) As
"ListBox1Inner"

End

Public Sub ListBox1Inner_MouseDown()

  Object.Raise(ListBox1, "MouseDown")
  Stop Event  ' stop further triggers

End

' Now ListBox1_MouseDown works
Public Sub ListBox1_MouseDown()

  Debug "got mousedown"

End

Respects
BruceS
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