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3. Click the background of the form to deselect any selected items, then click Form|Lay Out Vertically. 4. Click Form|Adjust Size to resize the form to its preferred size. The red lines that appear on the form show the layouts that have been created. They don't appear when the form is run. 8. The form with the layouts Now click Edit|Edit Tab Order. A number in a blue rectangle will appear next to every widget that can accept focus. Click each widget in turn in the order you want them to accept focus, then click Edit|Edit Widgets to leave tab order mode.

The outer layout is the main layout; it is installed on the FindDialog on line 35 and is responsible for the dialog's entire area. The other three layouts are sub-layouts. 2 is a spacer item (or "stretch"). It uses up the empty space below the Find and Close buttons, ensuring that these buttons occupy the top of their layout. 2. The Find dialog's layouts [View full size image] One subtle aspect of the layout manager classes is that they are not widgets. Instead, they inherit QLayout, which in turn inherits QObject.

H. ui file. The class declares member variables that store the form's child widgets and layouts, and a setupUi() function that initializes the form. The generated class looks like this: class Ui::GoToCellDialog { public: QLabel *label; QLineEdit *lineEdit; QSpacerItem *spacerItem; QPushButton *okButton; QPushButton *cancelButton; ... void setupUi(QWidget *widget) { ... } }; The generated class doesn't inherit any Qt class. cpp , we create a QDialog and pass it to setupUi(). If you run the program now, the dialog will work, but it doesn't function exactly as we want: The OK button is always disabled.

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