Deleting "created" pushbuttons in runtime.

mit_cruze

for(int i=0; i<row; i++)
  {
      for(int j=0; j<column; j++)
      {
          view[k] = new QGraphicsView(this->centralWidget());//this->centralWidget
          _instance = new VlcInstance(VlcCommon::args(), this);
          _player[k] = new VlcMediaPlayer(_instance);
          video[k] = new VlcWidgetVideo(this->centralWidget()); //cntralWidget in bracket
          view[k]->setViewport(video[k]);
          _player[k]->setVideoWidget(video[k]);
          _equalizerDialog->setMediaPlayer(_player[k]);

          p1[k]=new QPushButton("pushbutton");
          p2[k]=new QPushButton("pushbutton");
          label[k]=new QLabel("Mitesh");


          layout1[k]=new QHBoxLayout;
          layout1[k]->addWidget(label[k]);
          layout1[k]->addWidget(p1[k]);
          layout1[k]->addWidget(p2[k]);
          
          
          layout[k]=new QVBoxLayout;
          layout[k]->addLayout(layout1[k]);
          layout[k]->addWidget(view[k]);
          
          switch(flag1)
          {
          case 0:

              gridLayout->addLayout(layout[k],i,j,1,1);
              break;
/* more code here */
       }
}
}

As shown in code I have created p1[k] , p2[k], and label[k] widgets.
But in some cases I dont need them. How to remove extra widgets.

Corvus91

Hi,

you can hide a unused widget by using the function hide() or setVisible(false)

Greetings,

Corvus

mit_cruze

I can not find hide or setvisible function for layout.
I can only hide pushbuttons.

mrjj

@mit_cruze
Yes, you cannot hide a layout.
You must hide the unused buttons.

If you decide to really remove them, there is ONLY one way and its via
takeAt
http://doc.qt.io/qt-5/qlayout.html#takeAt

That give you back your button so you own it again. else layout still owns it and u are not allowed to delete it.

raven-worx

@mrjj said in Deleting "created" pushbuttons in runtime.:

Yes, you cannot hide a layout.

But the layouts parent widget though. (QLayout::parentWidget())
Which is the widget it has to been installed on when the layout is visible.

Alain38

For me, the simplest way is to create a standard QWidget. Layout1[k] will become the layout of this QWidget. So you will be able to show/hide this widget using setVisible on it.