Dynamic buttons array

[Jan Jaap Fahner]

Hi,

(using Borland C++ Builder 1.0)

I am creating buttons dynamically, and using an array
to store the pointers. I do this 'cause I don't know
how many buttons I'll need.
I've also written a trigger procedure that I assign to the
dynamic buttons.

Does anyone know how to determine which button
was pressed ? I could find the button for left-click
by finding the focus, but right-clicking doesn't focus
the button...

Thanks,

JJ

[Jonathan Arnold]

> Does anyone know how to determine which button
> was pressed ? I could find the button for left-click

When you create the button, set its Tag value to something that you
can switch off of:

button_array[kk] = new TButton(this);
button_array[kk]->Tag = kk;

....

switch (button->Tag)
{
case 1:
...
}

+===================================================+
| Jonathan Arnold (mailto:jdar...@buddydog.org) |
| Senior Engineer Roger Wagner Publishing |
| http://people.ne.mediaone.net/jdarnold |
+===================================================+

"When a man's best friend is his dog, that dog has a problem."
Edward Abbey

[Jon Jenkinson]

Hi Jan,

You need to dynamically assign an event handler of the correct type to
the event you need. For instance,

TButton *MyButton = new TButton(Application);

MyButton->OnClick = MyClickHandler;
MyButton->MouseDown = MyMouseDownHandler;

You then declare the two event functions manually and action
accordingly,

void __fastcall TForm1::MyClickHandler(TObject *Sender)
{
TButton *TempButton = reinterpret_cast <TButton *> (Sender);

//if you've got them in a list, you can do a routine to find the index
//in the list which has TempButton as it's pointer, or when you create
.//the button set the Tag property to the index position in the list
}

//not don't delete TempButton :)

HTH
Jon

Jan Jaap Fahner <J...@emea.progress.com> wrote:

>Hi,
>
>(using Borland C++ Builder 1.0)
>
>I am creating buttons dynamically, and using an array
>to store the pointers. I do this 'cause I don't know
>how many buttons I'll need.
>I've also written a trigger procedure that I assign to the
>dynamic buttons.
>

>Does anyone know how to determine which button
>was pressed ? I could find the button for left-click

[Thomas Liu]

You just need to compare 'Sender' with your button pointers in your
event handlers.

e.g.

if( Sender == btn[0] )
{
...
}
else if( Sender == btn[1] )
{
...
}
...

On Mon, 03 Aug 1998 12:48:06 +0200, Jan Jaap Fahner