How To Create Array of Widgets in Qt4?

[redhat]

Hi
How I Can Create Array of Widgets (For Example: QLineEdit) on Qt4?

Please Help Me!
Thanks.

[Lykurg]

Maybe

QList<QLineEdit*> myList;
mylist.append(new QLineEdit());

QList<QLineEdit*> myList;
mylist.append(new QLineEdit());

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depends on what you want to do.

Lykurg

[vonCZ]

Is this bad? I want to create an array of widgets to put on a QStackedWidget. Can I do this:

//  ...in  myfile.cpp...
 
  QPushButton *pb[2];
 
  for(int a=0; a<2; a++)
  {
    pb[a] = new QPushButton;
    myStack->addWidget(pb[a]);
  }

//  ...in  myfile.cpp...

  QPushButton *pb[2];

  for(int a=0; a<2; a++)
  {
    pb[a] = new QPushButton;
    myStack->addWidget(pb[a]);
  }

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It compiles and seems to work. Previously when I've needed an array of Widgets, I would declare

QPushButton *pb[2];


in the header file. But is there any reason I cannot declare it in the .cpp file like above?

[vonCZ]

follow-up: if I need to replace the "2" with "getNumber()" like so:

//  ...in  myfile.cpp...
 
  //  QPushButton *pb[2];
 
  QPushButton *pb[    getNumber()   ];
 
  //  or
  //  const int tempNum = getNumber();
  //  QPushButton *pb[tempNum];
 
  for(int a=0; a<2; a++)
  {
    pb[a] = new QPushButton;
    myStack->addWidget(pb[a]);
  }

//  ...in  myfile.cpp...

  //  QPushButton *pb[2];

  QPushButton *pb[    getNumber()   ];

  //  or
  //  const int tempNum = getNumber();
  //  QPushButton *pb[tempNum];

  for(int a=0; a<2; a++)
  {
    pb[a] = new QPushButton;
    myStack->addWidget(pb[a]);
  }

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I get an error: expected constant expression. Is there a way around this?

[ComaWhite]

follow-up: if I need to replace the "2" with "getNumber()" like so:

//  ...in  myfile.cpp...
 
  //  QPushButton *pb[2];
 
  QPushButton *pb[    getNumber()   ];
 
  //  or
  //  const int tempNum = getNumber();
  //  QPushButton *pb[tempNum];
 
  for(int a=0; a<2; a++)
  {
    pb[a] = new QPushButton;
    myStack->addWidget(pb[a]);
  }

//  ...in  myfile.cpp...

  //  QPushButton *pb[2];

  QPushButton *pb[    getNumber()   ];

  //  or
  //  const int tempNum = getNumber();
  //  QPushButton *pb[tempNum];

  for(int a=0; a<2; a++)
  {
    pb[a] = new QPushButton;
    myStack->addWidget(pb[a]);
  }

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I get an error: expected constant expression. Is there a way around this?

You will have to wait for constexpr in C++0x to be able to do it.