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C++ Discussion Thread
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May 12th, 2009

Disable Close button on form

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How would it be possible to disable the closebutton(X) in the upper right corner of the form.
I dont want to use this property because it takes the minimize and maximize button away also.

C++ Syntax (Toggle Plain Text)

ControlBox = false;

The only thing I will need on the form is the minimizebutton.
I can find separate properties for the minimizebutton and maximizebutton but not for the (X) button.

Last edited by Lukezzz; May 12th, 2009 at 10:09 pm.

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Lukezzz

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May 12th, 2009

Re: Disable Close button on form

[Warning: This is coming from a Java programmer with no C++ experience]

Assuming that clicking 'X' generates an event, and C++ has method overriding - override the method that closes the window when the user clicks 'X', and do nothing in that method. That way, nothing will happen when the 'X' is clicked.

BestJewSinceJC

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Posting Maven

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May 13th, 2009

Re: Disable Close button on form

The problem is that I have put "Exit" in the File menu that will be used to close the window and the application like:

C++ Syntax (Toggle Plain Text)

this->Close();

So I cant if that is possible to not close the form in that event.

I still need to disable or remove the close(X) from the form in somehow.

Click to Expand / Collapse Quote originally posted by BestJewSinceJC ...

[Warning: This is coming from a Java programmer with no C++ experience]

Assuming that clicking 'X' generates an event, and C++ has method overriding - override the method that closes the window when the user clicks 'X', and do nothing in that method. That way, nothing will happen when the 'X' is clicked.

Lukezzz

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May 13th, 2009

Re: Disable Close button on form

Give us a little chance and tell us what GUI you are using?

jencas

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May 13th, 2009

Re: Disable Close button on form

Yes ofcourse, I forgot to tell this.

I use Visual C++ 2008 Express Edition. I am googling around but I have problem to find a direct solution for this.

Click to Expand / Collapse Quote originally posted by jencas ...

Give us a little chance and tell us what GUI you are using?

Lukezzz

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May 13th, 2009

Re: Disable Close button on form

c++ Syntax (Toggle Plain Text)
 
// extra variable
Boolean can_exit;
 
// form closing
if(!can_exit)
   e->Cancel::set(true);
 
// button exit click
can_exit = true;
 
this->Close();
 
// form load
can_exit = false;
// extra variable
Boolean can_exit;

// form closing
if(!can_exit)
   e->Cancel::set(true);

// button exit click
can_exit = true;

this->Close();

// form load
can_exit = false;

hope that helps..

Last edited by cikara21; May 13th, 2009 at 12:46 pm.

cikara21

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May 13th, 2009

Re: Disable Close button on form

It seems to work almost, I have to ask here.
I have succeded to put this as a global variable:

(Toggle Plain Text)

bool can_exit;

In the closing event of the form, I have put this code:

(Toggle Plain Text)

if(!can_exit)
   e->Cancel::set(true);

In the Load event of the form, I have put this code:

(Toggle Plain Text)

can_exit = false;

But I dont understand where to put this code:

(Toggle Plain Text)

// button exit click
can_exit = true;

I have never found an event for the close(x) button but perheps there is one ? I wonder if that code will be put in that event in that case.

However if I put the other code in place, nothing happens when I click the close(X) button wich is perfect.
However when I press a button on the form that tries to close the form(below code), nothing happens but perheps that has to do with the code that I wonder where to put:

C++ Syntax (Toggle Plain Text)

this->Close();

this->Close();

Click to Expand / Collapse Quote originally posted by cikara21 ...

c++ Syntax (Toggle Plain Text)
 
// extra variable
Boolean can_exit;
 
// form closing
if(!can_exit)
   e->Cancel::set(true);
 
// button exit click
can_exit = true;
 
this->Close();
 
// form load
can_exit = false;
// extra variable Boolean can_exit; // form closing if(!can_exit) e->Cancel::set(true); // button exit click can_exit = true; this->Close(); // form load can_exit = false;
hope that helps..

Last edited by Lukezzz; May 13th, 2009 at 3:31 pm.

Lukezzz

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May 13th, 2009

Re: Disable Close button on form

I just understood that I will put that code in the event for the button that will close the form:

Many thanks for this help...

C++ Syntax (Toggle Plain Text)

// button exit click
can_exit = true;

Lukezzz

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