[Gambas-user] Removing a runtime created control

[Jussi Lahtinen]

I mean Last works inside the event handler, whatever had raised it.

Jussi


On Fri, Nov 27, 2020 at 8:39 PM Jussi Lahtinen <jussi.lahtinen at gmail.com>
wrote:

> At least here you seem to give a new handle:  mTxt[fldNr] = New
> TextBox(Maske) As "MaskeFeld"
> The events are raised by the name: My_Button1_Change, My_Button2_Change,
> etc.
> If they are grouped you can just use Last (no dot) keyword.
>
> Jussi
>
>
> On Fri, Nov 27, 2020 at 5:35 PM Rolf-Werner Eilert <rwe-sse at osnanet.de>
> wrote:
>
>> Interesting, Jussi!
>>
>> My version also uses the same handle and event name for each object, and
>> it finds its events with the .Last property. This was described in some
>> help text. Maybe it's obsolete meanwhile? I always wondered how it could
>> work, but I just accepted it as given.
>>
>> Your version "New ToolButton(Me) As "My_Button" & CStr(intIndex)" is
>> much clearer to me, but how would I use .Last in this case? Or: how can
>> I find just "the object which has produced the Change event (for example)?
>>
>> Rolf
>>
>>
>> Am 27.11.20 um 16:17 schrieb Jussi Lahtinen:
>> > I'm surprised that works at all, because you are using the same handle
>> > and the event name for multiple buttons.
>> >
>> >    Dim intIndex As Integer[3]
>> >     For intIndex = 0 To 2
>> >       hToolButton[intIndex] = New ToolButton(Me) As "My_Button" &
>> > CStr(intIndex)
>> > ...
>> >
>> > That should behave predictable.
>> >
>> > Jussi
>> >
>> >
>> >
>> > On Fri, Nov 27, 2020 at 12:35 PM KKing <kicking177 at gmail.com
>> > <mailto:kicking177 at gmail.com>> wrote:
>> >
>> >     I've just run the following code in 3.12.2 on Debian10 LXDE and
>> >     Debian10
>> >     KDE.
>> >     NB I'm creating as just "Graphical Application" (i.e. not QT or GTK)
>> >        - - - - - -
>> >     Private hToolButton As ToolButton
>> >
>> >     Public Sub btnTest_Click()
>> >         Dim intIndex As Integer
>> >         For intIndex = 0 To 2
>> >           hToolButton = New ToolButton(Me) As "My_Button"
>> >           hToolButton.Top = 0 + (intIndex * 30)
>> >           hToolButton.Left = 0
>> >           hToolButton.Width = 300
>> >           hToolButton.Height = 30
>> >           hToolButton.Text = "MyButton" & CStr(intIndex)
>> >         Next
>> >     End
>> >
>> >     Public Sub btnRemove_Click()
>> >
>> >         Me["My_Button"].Delete
>> >
>> >     End
>> >
>> >     Public Sub My_Button_Click()
>> >
>> >         Message.Info("Hello")
>> >
>> >     End
>> >        - - - - - -
>> >
>> >     On LXDE the btnTest generates the 3 buttons
>> >     click btnRemove once removes the first drawn button the remaining
>> >     buttons still function
>> >     click again and it removes the second drawn button the remaining
>> button
>> >     still functions
>> >     click again and it removes the third and last drawn button.
>> >
>> >     *** How could I just selectively remove a button based on index?
>> >
>> >     NB the index for 0 to 2 is just for this example test, in desired
>> >     application there would be a variable and large number of buttons
>> >     determined by data and user interaction.
>> >
>> >     As a workaround I could do
>> >           hToolButton = New ToolButton(Me) As "My_Button" &
>> CStr(intIndex)
>> >     which allows me to absolutely delete individual buttons but it means
>> >     instead of having one
>> >           Public Sub My_Button_Click()
>> >     I would have to code a large number sub just in case needed, for
>> this
>> >     example it would just need
>> >           Public Sub My_Button0_Click()
>> >           Public Sub My_Button1_Click()
>> >           Public Sub My_Button2_Click()
>> >     But in the real application I may needs something like potentially
>> >     60 of
>> >     them!
>> >
>> >     ALSO
>> >     running the same code in Debian10 KDE does not work the same.
>> >     Clicking btnRemove once removes the last drawn button only (and the
>> >     first two buttons still work)
>> >     But when click btnRemove again to remove next button it complains
>> >     Me["My_Button"] is a null object
>> >     K.
>> >
>> >     ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
>> >
>> >
>> >
>> > ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
>> >
>>
>>
>> ----[ http://gambaswiki.org/wiki/doc/netiquette ]----
>>
>
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