QSplitter Class

Detailed Description

A splitter lets the user control the size of child widgets by dragging the boundary between them. Any number of widgets may be controlled by a single splitter. The typical use of a QSplitter is to create several widgets and add them using insertWidget() or addWidget().

The following example will show a QListView, QTreeView, and QTextEdit side by side, with two splitter handles:

     QSplitter *splitter = new QSplitter(parent);
     QListView *listview = new QListView;
     QTreeView *treeview = new QTreeView;
     QTextEdit *textedit = new QTextEdit;
     splitter->addWidget(listview);
     splitter->addWidget(treeview);
     splitter->addWidget(textedit);

If a widget is already inside a QSplitter when insertWidget() or addWidget() is called, it will move to the new position. This can be used to reorder widgets in the splitter later. You can use indexOf(), widget(), and count() to get access to the widgets inside the splitter.

A default QSplitter lays out its children horizontally (side by side); you can use setOrientation(Qt::Vertical) to lay its children out vertically.

By default, all widgets can be as large or as small as the user wishes, between the minimumSizeHint() (or minimumSize()) and maximumSize() of the widgets.

QSplitter resizes its children dynamically by default. If you would rather have QSplitter resize the children only at the end of a resize operation, call setOpaqueResize(false).

The initial distribution of size between the widgets is determined by multiplying the initial size with the stretch factor. You can also use setSizes() to set the sizes of all the widgets. The function sizes() returns the sizes set by the user. Alternatively, you can save and restore the sizes of the widgets from a QByteArray using saveState() and restoreState() respectively.

When you hide() a child, its space will be distributed among the other children. It will be reinstated when you show() it again.