[Gambas-user] custom controls tutorial or guide

[Fabien Bodard]

I think for the begginnig you must to do an encapsulating classe.

It's a class that take a control as parameter. And give to it new
function or feature.

so:

=============================================================

CLASS CColourCombo

Private $hComboBox
Private $hObs as new Observer
Public sub _New(hCombo as ComboBox)

  $hComboBox = hCombo
  $hOBS=NEW Observer(hCombo) AS "MyCombo"
End


PUBLIC SUB MyCombo_Change()

  If $hCombox.Current.Text<0 then
    $hComboBox.BackColor=Color.Red
  else
    $hComboBox.BackColor=Color.White
  endif
end
====================================
'Form

Now in your form just add
Public sub _New
dim hCColourCombo as CColourCombo

hCColourCombo = new CColourCombo(MyComboBox)

endif


END

======================================



And now you have a combo box that change backcolour when the selected
value is negative !

It's more simple than a control if you have no so many feature to add.


Fabien



2009/11/8 bbb888 <bbruen at ...2308...>:
>
> Hi guys,
>
> Is there a guideline of some sort for howto create custom controls?
>
> I was thinking I might cut my teeth on a context sensitive combobox that
> changes background color depending on the selected value.
>
> But I just don't know where to start. :-((
>
> regards
> bruce
> --
> View this message in context: http://old.nabble.com/custom-controls-tutorial-or-guide-tp26251482p26251482.html
> Sent from the gambas-user mailing list archive at Nabble.com.
>
>
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