Hello,

I'm adding a QCheckBox to a QLayout. The QWidget in which the QLayout resides is not being displayed under Windows 7. It is shown in the taskbar and I can maximize it from there thus making it display but it is not displayed as a regular window. No matter what I tried to get the QCheckBox into the QLayout.
Here's the code:
Qt Code: 
  1. private:
  2. 	QSize size;
  3. 	QBoxLayout* boxLayout;
  4. 	QFormLayout* formLayout;
  5. 	QLabel* label;
  6. 	QDoubleSpinBox* doubleSpinBox;
  7. 	QLabel* label_2;
  8. 	QDoubleSpinBox* doubleSpinBox_2;
  9. 	QLabel* label_3;
  10. 	QDoubleSpinBox* doubleSpinBox_3;
  11. 	QLabel* label_4;
  12. 	QDoubleSpinBox* doubleSpinBox_4;
  13. 	QLabel* label_5;
  14. 	QCheckBox* checkBox;
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Declared inside X.h
Qt Code: 
  1. X::X() :  size(202,157)
  2. {
  3. 	boxLayout = new QBoxLayout(QBoxLayout::TopToBottom, this);
  4. 	formLayout = new QFormLayout();
  5. 	label = new QLabel("a");
  6. 	doubleSpinBox = new QDoubleSpinBox(this);
  7. 	doubleSpinBox->setDecimals(3);
  8. 	doubleSpinBox->setMaximum(1);
  9. 	doubleSpinBox->setSingleStep(0.001);
  10. 	formLayout->addRow(label, doubleSpinBox);
  11. 	label_2 = new QLabel("a");
  12. 	doubleSpinBox_2 = new QDoubleSpinBox();
  13. 	doubleSpinBox_2->setDecimals(3);
  14. 	doubleSpinBox_2->setMaximum(1);
  15. 	doubleSpinBox_2->setSingleStep(0.001);
  16. 	formLayout->addRow(label_2, doubleSpinBox_2);
  17. 	label_3 = new QLabel("a");
  18. 	doubleSpinBox_3 = new QDoubleSpinBox();
  19. 	doubleSpinBox_3->setDecimals(3);
  20. 	doubleSpinBox_3->setMaximum(1);
  21. 	doubleSpinBox_3->setSingleStep(0.001);
  22. 	formLayout->addRow(label_3, doubleSpinBox_3);
  23. 	label_4 = new QLabel("a");
  24. 	doubleSpinBox_4 = new QDoubleSpinBox();
  25. 	doubleSpinBox_4->setDecimals(3);
  26. 	doubleSpinBox_4->setMaximum(1);
  27. 	doubleSpinBox_4->setSingleStep(0.001);
  28. 	formLayout->addRow(label_4, doubleSpinBox_4);
  29. 	boxLayout->addLayout(formLayout);
  30. 	checkBox = new QCheckBox("a");
  31. 	//boxLayout->addWidget(checkBox); // enabling this line makes the QWidget X not display
  32. }
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I tried adding a label and the QCheckBox to the QFormLayout and didn't have the QBoxLayout but it didn't work. I thought it's perhaps the QFormLayout only accepting "input QWidgets" and QCheckBox isn't defined as an "input QWidget" according to QDesigner, thus I switched to a QBoxLayout containing a QFormLayout and a QCheckBox to no avail.

Help!

Lars