Dear Sirs,

I'm designing a window which appears when information has to be entered.
This window contains a variable number of ComboBox, but when this number is to big, the window size is bigger than the screen size.

I tried to implement a scroll bar (last lines of the code bellow), but it freezes the program ??

Would someone have any idea ?

Thanks in advance,

Best Regards,

Stéphane


Qt Code: 
  1. // Telemetry data assignment
  2. void MainWindow::data_assignment()
  3. {
  4.     // New window object instanciation
  5.     window_data_assignment = new QWidget;
  6.  
  7.     ...
  8.     ...
  9.     ...
  10.     ...
  11.  
  12.     // Data input assigment sub-widget creation
  13.     QWidget *data_assigment_input;
  14.     data_assigment_input = new QWidget;
  15.  
  16.     // Label displayed of the combobox
  17.         QLabel *Label;
  18.     // Combo box // if column_number if a constant
  19.         // QComboBox *ComboBox[columns_number];
  20.  
  21.     // Combo box // if column_number if a constant
  22.     // this will have to be release by using delete []comboBox;
  23.         QComboBox** ComboBox = new QComboBox*[columns_number];
  24.         // delete []comboBox;
  25.  
  26.  
  27.     // GRID LAYOUT declaration
  28.         QGridLayout *grid;
  29.  
  30.  
  31.     // GRID LAYOUT INSTANTIATION
  32.         grid = new QGridLayout;
  33.  
  34.     // Data assigmnent window filling with input sub-widgets
  35.     for (unsigned int row = 0; row < columns_number; row++)
  36.         {
  37.         Label = new QLabel(tr("Data type of column # ")+QString::number(row+1)+" :");
  38.  
  39.         ComboBox[row] = new QComboBox;
  40.  
  41.         // Combo box data filling
  42.         for (unsigned int i = 0; i<DATA_TYPE_NB; i++)
  43.             ComboBox[row]->addItem(tr(DATA_TYPE[i]));
  44.  
  45.         grid->addWidget(Label, row, 0);
  46.         grid->addWidget(ComboBox[row], row, 1);
  47.         }
  48.  
  49.     //
  50.     data_assigment_input->setLayout(grid);
  51.  
  52.  
  53.  
  54.     // Quit push button creation
  55.     QPushButton *quit = new QPushButton(tr("OK"));
  56.     // quit->setFont(QFont("Times", 18, QFont::Bold));
  57.  
  58.     // Connection between widgets
  59.     connect(quit, SIGNAL(clicked()), window_data_assignment, SLOT(close()));
  60.  
  61.     // Size/Position auto-managment by QVBoxLayout
  62.     QVBoxLayout *wlayout = new QVBoxLayout;
  63.     wlayout->addWidget(data_assigment_input);
  64.     wlayout->addWidget(quit);
  65.  
  66.  
  67.  
  68.     // Window scrolling
  69.     // Adding a scroll area
  70.     QScrollArea *scrollArea = new QScrollArea;
  71.     // scrollArea->setWidgetResizable(true);
  72.     scrollArea->setWidget(window_data_assignment);
  73.  
  74.     wlayout->addWidget(scrollArea);
  75.  
  76.     window_data_assignment->setLayout(wlayout);
  77.  
  78. }
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