How to stop multiple appearance of a widget

[Sarma]

hi all,
I have an application in which when I press a button I should get a find dialog box. Thing is if I press the button again, I shouldnot get one more dialog box. The previous one should appear.
My present code is like this:

CPT::CPT(QWidget *parent):QWidget(parent)
 {
    //some other lines of code
    QPushButton *but=new QPushButton(this);
    QObject::connect(but,SIGNAL(clicked()),this,SLOT(findbox()));
   //remaining program
 }
 void CPT::findbox()
 {
    QWidget  *findstr=new QWidget;
    //other widgets added to it
    findstr->show();
 }

CPT::CPT(QWidget *parent):QWidget(parent)
 {
    //some other lines of code
    QPushButton *but=new QPushButton(this);
    QObject::connect(but,SIGNAL(clicked()),this,SLOT(findbox()));
   //remaining program
 }
 void CPT::findbox()
 {
    QWidget  *findstr=new QWidget;
    //other widgets added to it
    findstr->show();
 }

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So kindly help me in this problem.

[sunil.thaha]

Window::showFindDialog(){
    static FindDialog* pFindDlg = 0;
    if( pFindDlg == 0 ) {
        pFindDlg = new FindDialog( this, "") ;
     }
   pFindDlg->show();
   pFindDlg->raise();
   pFindDlg->setActiveWindow();
 
}

Window::showFindDialog(){
    static FindDialog* pFindDlg = 0;
    if( pFindDlg == 0 ) {
        pFindDlg = new FindDialog( this, "") ;
     }
   pFindDlg->show();
   pFindDlg->raise();
   pFindDlg->setActiveWindow();

}

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[Sarma]

hi sunil,
can you please show me the changes that I have to make in my program. And u have written FindDialog in your code. Is there any such default dialog box provided by Qt.

regards,
Sarma.

[sunil.thaha]

I just called the Dialog you wanted to show as FindDialog That is all !

[Sarma]

sorry sunil,
That is giving good number of errors. It says that the second line (of your code) is wrong and because of this, it says that pFindDlg is not defined. can you suggest me other method

[sunil.thaha]

Try the Attachment

[Sarma]

hi sunil,
well, thanks for your help. But no where I have found the code that you have written previously. In which file should I see that . And can you please tell me how to generate the .ui files and use them in our ordinary program.

Thanks & regards,
Sarma.

[wysota]

See the FAQ.

[Sarma]

sir,
Iam getting errors as I said previously . Kindly show me the changes that I have to make in my code(I have send it in my first post).

Thanks & regards,
Sarma.

[wysota]

Look at the FAQ entry I mentioned. The code is there -- literally. Especially note the "static" keyword.

[Sarma]

sir,
I have modified my code like this:

CPT::CPT(QWidget *parent):QWidget(parent)
      {
         //some other lines of code
         QPushButton *but=new QPushButton(this);
         QObject::connect(but,SIGNAL(clicked()),this,SLOT(findbox()));
         //remaining program
       }
      void CPT::findbox()
       {
          QWidget  *fwin=new QWidget;
           //other widgets added to it
           //fwin->show();
           static fwin *form2 = new fwin(this);
           form2->show();
           form2->activateWindow(); // or form2->setActiveWindow() in Qt3
           form2->raise();
        }

CPT::CPT(QWidget *parent):QWidget(parent)
      {
         //some other lines of code
         QPushButton *but=new QPushButton(this);
         QObject::connect(but,SIGNAL(clicked()),this,SLOT(findbox()));
         //remaining program
       }
      void CPT::findbox()
       {
          QWidget  *fwin=new QWidget;
           //other widgets added to it
           //fwin->show();
           static fwin *form2 = new fwin(this);
           form2->show();
           form2->activateWindow(); // or form2->setActiveWindow() in Qt3
           form2->raise();
        }

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And I got the following errors:

"cptdebug.cpp", line 1501: Error: fwin, of type int, was previously declared QWidget*.
"cptdebug.cpp", line 1501: Error: Multiple declaration for fwin.
"cptdebug.cpp", line 1501: Error: "," expected instead of "*".
"cptdebug.cpp", line 1502: Error: form2 is not defined.
"cptdebug.cpp", line 1503: Error: form2 is not defined.
"cptdebug.cpp", line 1504: Error: form2 is not defined.

Kindly tell me why? And give me the possible solution.

Thanks and regards,
Sarma.