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digitalmars.D.learn - accessing dfl objects

reply Tyro[a.c.edwards] <no spam.com> writes:
I should probably be posting this somewhere else but hopefully someone here
will be able to give me some advice.

Following the examples provided with DFL, I have created a tabbed form
containing a number of text boxes, labels and a cancel and submit button.
onSubmit_click I need to save the information contained in the text boxes to a
file, likewise onCancel_click, I need to set all textboxes to null. Problem is
I'm not sure how to access all the different text boxes to save or update the
values.

all text boxes were created in the following manner:

TextBox transactionData; // this is the only variable I use for textboxes
with(transactionData = new TextBox)
{
  // set properties;
}
control.add(transactionData)
with(transactionData = new TextBox)
{
  // set properties for new button;
}
control.add(transactionData)
//etc...

I've found that if I instantiate each TextBox at class scope, then I can access
and update them later, however, since there will literally be hundreds of these
boxes I don't want to have to declare a pointer to every single one. Is there
another way?

Any assistance is greatly appreciated.
Andrew
May 05 2008
parent reply Milke Wey <no.spam example.com> writes:
On Mon, 2008-05-05 at 23:35 -0400, Tyro[a.c.edwards] wrote:

 I should probably be posting this somewhere else but hopefully someone he=


re will be able to give me some advice.

=20
 Following the examples provided with DFL, I have created a tabbed form co=


ntaining a number of text boxes, labels and a cancel and submit button. onS=
ubmit_click I need to save the information contained in the text boxes to a=
 file, likewise onCancel_click, I need to set all textboxes to null. Proble=
m is I'm not sure how to access all the different text boxes to save or upd=
ate the values.

=20
 all text boxes were created in the following manner:
=20
 TextBox transactionData; // this is the only variable I use for textboxes
 with(transactionData =3D new TextBox)
 {
   // set properties;
 }
 control.add(transactionData)
 with(transactionData =3D new TextBox)
 {
   // set properties for new button;
 }
 control.add(transactionData)
 //etc...
=20
 I've found that if I instantiate each TextBox at class scope, then I can =


access and update them later, however, since there will literally be hundre=
ds of these boxes I don't want to have to declare a pointer to every single=
 one. Is there another way?

=20
 Any assistance is greatly appreciated.
 Andrew


I don't use DFL myself but looking at the on-line documentation
something like this should do it.

foreach(ctrl; control.controls)
{
	=EF=BB=BFTextBox textBox =3D cast(=EF=BB=BFTextBox)ctrl;

	if ( textBox !is null )
	{
		//Do something with the text box
	}
}

--=20
Mike Wey
May 06 2008
parent reply Tyro[a.c.edwards] <no spam.com> writes:
Milke Wey Wrote:


 On Mon, 2008-05-05 at 23:35 -0400, Tyro[a.c.edwards] wrote:


[snip]


 
 I've found that if I instantiate each TextBox at class scope, then I can
access and update them later, however, since there will literally be hundreds
of these boxes I don't want to have to declare a pointer to every single one.
Is there another way?
 
 Any assistance is greatly appreciated.
 Andrew


 
 I don't use DFL myself but looking at the on-line documentation
 something like this should do it.
 
 foreach(ctrl; control.controls)
 {
 	TextBox textBox = cast(TextBox)ctrl;
 
 	if ( textBox !is null )
 	{
 		//Do something with the text box
 	}
 }
 
 -- 
 Mike Wey
 


Thanks for the assistance Mike... This works great if I'm trying to access the
control itself, but in this case I'm trying to get to the objects embeded in
the control.

For example: I have a tabbed control with 7 tabs and each tab has a set of
labels, buttons, and textboxes. This method allows me to access the properties
of the tabbed control but I'm trying to find out how to access the textboxes on
each tab.

Thanks again,
Andrew
May 06 2008
parent Christian Hartung <christian.s77 gmail.com> writes:
Tyro[a.c.edwards] escreveu:

 Milke Wey Wrote:
 

 On Mon, 2008-05-05 at 23:35 -0400, Tyro[a.c.edwards] wrote:


 
 [snip]
 

 I've found that if I instantiate each TextBox at class scope, then I can
access and update them later, however, since there will literally be hundreds
of these boxes I don't want to have to declare a pointer to every single one.
Is there another way?

 Any assistance is greatly appreciated.
 Andrew


 I don't use DFL myself but looking at the on-line documentation
 something like this should do it.

 foreach(ctrl; control.controls)
 {
 	TextBox textBox = cast(TextBox)ctrl;

 	if ( textBox !is null )
 	{
 		//Do something with the text box
 	}
 }

 -- 
 Mike Wey


 
 Thanks for the assistance Mike... This works great if I'm trying to access the
control itself, but in this case I'm trying to get to the objects embeded in
the control.
 
 For example: I have a tabbed control with 7 tabs and each tab has a set of
labels, buttons, and textboxes. This method allows me to access the properties
of the tabbed control but I'm trying to find out how to access the textboxes on
each tab.
 
 Thanks again,
 Andrew


I think this should work:

foreach(c; control.controls)
{
     TabPage t = cast(TabPage)c;

     if(t !is null)
     {
         foreach(ctrl; t)
         {
             TextBox textBox = cast(TextBox)ctrl;

             if(textBox !is null)
             {
                 // ....
             }
         }
      }
}
May 08 2008