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@...>:
>
> 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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