QGraphicsGridLayout Class Reference
[QtGui module]

Detailed Description

The QGraphicsGridLayout class provides a grid layout for managing widgets in Graphics View.

The most common way to use QGraphicsGridLayout is to construct an object on the heap with no parent, add widgets and layouts by calling addItem(), and finally assign the layout to a widget by calling QGraphicsWidget::setLayout(). QGraphicsGridLayout automatically computes the dimensions of the grid as you add items.

 QGraphicsScene scene;
 QGraphicsWidget *textEdit = scene.addWidget(new QTextEdit);
 QGraphicsWidget *pushButton = scene.addWidget(new QPushButton);

 QGraphicsGridLayout *layout = new QGraphicsGridLayout;
 layout->addItem(textEdit, 0, 0);
 layout->addItem(pushButton, 0, 1);

 QGraphicsWidget *form = new QGraphicsWidget;
 form->setLayout(layout);
 scene.addItem(form);

The layout takes ownership of the items. In some cases when the layout item also inherits from QGraphicsItem (such as QGraphicsWidget) there will be a ambiguity in ownership because the layout item belongs to two ownership hierarchies. See the documentation of QGraphicsLayoutItem::setOwnedByLayout() how to handle this. You can access each item in the layout by calling count() and itemAt(). Calling removeAt() will remove an item from the layout, without destroying it.

See also QGraphicsLinearLayout and QGraphicsWidget.

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