How to access button objects in an array of buttons?

[ConvertFromOldNGs]

by Eric Apperley >> Wed, 7 Nov 2007 23:16:49 GMT

Let's say I have 6 buttons and I need to do something to each, e.g. change the colour of each button. I would like to use a loop of course, but I don't know how to address each button...

In Delphi or VB.Net I'd iterate through the collection of controls of type button .

Its probably just as simple in JADE. Can someone give me a wee code snippet to show how to do this?

Thanks,
Eric

[ConvertFromOldNGs]

by BeeJay >> Thu, 8 Nov 2007 0:30:53 GMT

Form::controlCount and Form::controls should allow you to achieve the desired result. Here's a simple example of one way you might achieve the desired result:

vars
controlIndex : Integer ;
ctl : Control ;

begin
foreach controlIndex in 1 to self.controlCount do

ctl := self.controls( controlIndex );

if ctl.isKindOf( Button ) then
// Do something to the button
endif;

endforeach;

end;

[ConvertFromOldNGs]

by Allistar >> Thu, 8 Nov 2007 0:48:07 GMT

Hi could always add the buttons to a collection held on the form, and then iterate through them at some point.

Adding buttons to the collection:

- define a property (allButtons) of type ControlArray to the form (make it "exclusive").
- in the "load" event on the form add the buttons to the array:

allButtons.add(btOne);
allButtons.add(btTwo);
allButtons.add(btThree);

Then when you need to iterate through them, do this:

vars
button: Button;
iter: Iterator;begin

iter := allButtons.createIterator();
while (iter.next(button)) do
button.foreColor := Green;
endwhile;
epilog
delete iter;
end;

--
A.

[ConvertFromOldNGs]

by cnwjhp1 >> Thu, 8 Nov 2007 1:17:54 GMT

.....and if you are dynamically creating the controls with addControl or loadControl, you could add them into your collections as you create them.