Checkbox problems!

[RaveT]

Im making a program which in the main form has about 15 checkboxes. 14 of them are different choices and the last one is for "include all".

Now to the problem.

When I checks the "Include all" button i want all the others checkboxes greyed out. But for now the code look like this:

check_1->Enabled = false;
check_2->Enabled = false;
check_3->Enabled = false;
check_4->Enabled = false;
check_5->Enabled = false;
.
.
.
.
.
.
....and so on. It seems a bit clumpsy....

But cant i make a for-loop or something instead??

for ( int a=1;a<15;a++)

but how should write the names then of the checkboxes??


Or is there another better way to do it ??

 

[Supernat03]

Something like this:

for (int x=0; x < Form1->ComponentCount; x++)
{
TComponent *Comp = Form1->Components[x];
if (Comp->Name.SubString(&quot;check_&quot > 0)
{
TCheckBox *Box = (TCheckBox*) Comp;
Box->Enabled = false;
}
}

Replace Form1 with whatever parent owns the components. Don't name the &quot;check all&quot; check box with check_ of course.

Chris

 

[RaveT]

if (Comp->Name.SubString(&quot;check_&quot > 0)


sends me an error message, Substring needs (int, int)

What to do??

 

[Supernat03]

Sorry I used the wrong function. Replace SubString with AnsiPos

Chris

 

[unbornchikken]

Use RTTI information instead. Faster & nice.

register TCheckBox * cb;
for (register i=0; i < Form1->ComponentCount; i++)
{
if ((cb=dynamic_cast<TCheckBox *>(Form1->Components))!=NULL)
{
cb->Enabled=false;
}
}

 

[unbornchikken]

BUG: Form1->Components

CORRECT: Form1->Components

Misstyped, sorry.

 

[unbornchikken]

((

I'm new here.

Components !!!!

I hope this is correct now...

 

[Supernat03]

Won't that also disable the checkbox that you use to say &quot;Include All&quot; and any other checkboxes you have on the same form?

Chris

 

[unbornchikken]

Yes, but U can use Panels, GroupBoxes or the common Tag property to identify your CheckBox groups.

Unborn

 

[butthead]

maybe not so pretty

// at the Constructor or on show or whenever

Tlist *CBox;
CBox = new TList;

CBox->Add (CheckBox1);
CBox->Add (CheckBox2);
CBox->Add (CheckBox3);
CBox->Add (CheckBox4);
CBox->Add (CheckBox5);

then at any time after the list is populated you can just go through the list with a for loop and do whatever you want.

for (int x = 0; x < CBox->Count; x++)
{
if (CBox->Items [x])
{
TCheckBox *T;
T = (CheckBox*) CBox->Items [x];
T->Checked = false;
}
}

&quot;but how should write the names then of the checkboxes??&quot;

what specifically do you mean by this.

tomcruz.net

 

[finnmike]

Hej guys,

the last reply has a VERY IMPORTANT thing to notice:

when You create the checkboxes, the are added backwards when You set the ->Align to alTop.

The loop works, but the visualization is
last added = top checkbox.

I have done similair with checkklistboxes in a scrollbox:

The topwanted checklistbox was created last.

I have done also a nasty workaround:

While creating You could set the names of the checkboxes:
(Do this before showing the specific form)

[i]
(for int i=1; i<15; i++) 
{   
      TCheckBox *NewCB = TCheckBox(this);
      NewCB-> Parent = WhateverVisibleParent;  (THIS IS IMPORTANT!!!)
 //set all desired properties here
//and:
     NewCB->Name = &quot;checkb_&quot;+(AnsiString)i;
    
//  To remember these names / or their Values You could write these names into a 
// (permanent) Memo/into a file, where You could recall them from:

        PermanentMemo->Lines->Values[NewCB->Name] = &quot;yes&quot;;       // or &quot;1&quot; or whatever AnsiString You like  
// this line creates with i = 2 a line in the PermanentMemo:  checkb_2=yes

}
// create the &quot;all&quot; checkbox solely!


//to disable:   ( as Supernat has shown already)
AnsiString CheckBoxName; 
(for int ishow=0; ishow<  MyFormWhereWhateverVisibleParentResides->Component->Count; ishow++) 
{   
     CheckBoxName = Components[ishow]->Name;
     if ( CheckBoxName.Pos( &quot;checkb_&quot;) > 0)
     {
          (TCheckBox *)Components[ishow]->Enabled = false;     
     } 
}

[/i]

Maybe You get an idea of what is possible and this helps as well as the other posts!

Does anybody think that is too much memory intensive?
regards,

Michael

 

[unbornchikken]

Better you can use TStringList class istead of TMemo.

Unborn