QGraphicsGridLayout Class Reference
^{^{[QtGui module]}}

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

Methods

__init__ (self, QGraphicsLayoutItem parent = None)
addItem (self, QGraphicsLayoutItem item, int row, int column, int rowSpan, int columnSpan, Qt.Alignment alignment = 0)
addItem (self, QGraphicsLayoutItem aitem, int arow, int acolumn, Qt.Alignment alignment = 0)
Qt.Alignment alignment (self, QGraphicsLayoutItem item)
Qt.Alignment columnAlignment (self, int column)
int columnCount (self)
float columnMaximumWidth (self, int column)
float columnMinimumWidth (self, int column)
float columnPreferredWidth (self, int column)
float columnSpacing (self, int column)
int columnStretchFactor (self, int column)
int count (self)
float horizontalSpacing (self)
invalidate (self)
QGraphicsLayoutItem itemAt (self, int row, int column)
QGraphicsLayoutItem itemAt (self, int index)
removeAt (self, int index)
removeItem (self, QGraphicsLayoutItem item)
Qt.Alignment rowAlignment (self, int row)
int rowCount (self)
float rowMaximumHeight (self, int row)
float rowMinimumHeight (self, int row)
float rowPreferredHeight (self, int row)
float rowSpacing (self, int row)
int rowStretchFactor (self, int row)
setAlignment (self, QGraphicsLayoutItem item, Qt.Alignment alignment)
setColumnAlignment (self, int column, Qt.Alignment alignment)
setColumnFixedWidth (self, int column, float width)
setColumnMaximumWidth (self, int column, float width)
setColumnMinimumWidth (self, int column, float width)
setColumnPreferredWidth (self, int column, float width)
setColumnSpacing (self, int column, float spacing)
setColumnStretchFactor (self, int column, int stretch)
setGeometry (self, QRectF rect)
setHorizontalSpacing (self, float spacing)
setRowAlignment (self, int row, Qt.Alignment alignment)
setRowFixedHeight (self, int row, float height)
setRowMaximumHeight (self, int row, float height)
setRowMinimumHeight (self, int row, float height)
setRowPreferredHeight (self, int row, float height)
setRowSpacing (self, int row, float spacing)
setRowStretchFactor (self, int row, int stretch)
setSpacing (self, float spacing)
setVerticalSpacing (self, float spacing)
QSizeF sizeHint (self, Qt.SizeHint which, QSizeF constraint = QSizeF())
float verticalSpacing (self)

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.

Size Hints and Size Policies in QGraphicsGridLayout

QGraphicsGridLayout respects each item's size hints and size policies, and when a cell in the grid has more space than the items can fill, each item is arranged according to the layout's alignment for that item. You can set an alignment for each item by calling setAlignment(), and check the alignment for any item by calling alignment(). You can also set the alignment for an entire row or column by calling setRowAlignment() and setColumnAlignment() respectively. By default, items are aligned to the top left.

Method Documentation

QGraphicsGridLayout.init (self, QGraphicsLayoutItem parent = None)

The parent argument, if not None, causes self to be owned by Qt instead of PyQt.

Constructs a QGraphicsGridLayout instance. parent is passed to QGraphicsLayout's constructor.

QGraphicsGridLayout.addItem (self, QGraphicsLayoutItem item, int row, int column, int rowSpan, int columnSpan, Qt.Alignment alignment = 0)

The item argument has it's ownership transferred to Qt.

Adds item to the grid on row and column. You can specify a rowSpan and columnSpan and an optional alignment.

QGraphicsGridLayout.addItem (self, QGraphicsLayoutItem aitem, int arow, int acolumn, Qt.Alignment alignment = 0)

The aitem argument, if not None, causes self to be owned by Qt instead of PyQt.

Adds item to the grid on row and column. You can specify an optional alignment for item.

Qt.Alignment QGraphicsGridLayout.alignment (self, QGraphicsLayoutItem item)

Returns the alignment for item.

See also setAlignment().

Qt.Alignment QGraphicsGridLayout.columnAlignment (self, int column)

Returns the alignment for column.

See also setColumnAlignment().

Returns the number of layout items in this grid layout.

float QGraphicsGridLayout.horizontalSpacing (self)

Returns the default horizontal spacing for the grid layout.

See also setHorizontalSpacing().

QGraphicsGridLayout.invalidate (self)

Reimplemented from QGraphicsLayout.invalidate().

QGraphicsLayoutItem QGraphicsGridLayout.itemAt (self, int row, int column)

Returns a pointer to the layout item at (row, column).

QGraphicsLayoutItem QGraphicsGridLayout.itemAt (self, int index)

Reimplemented from QGraphicsLayout.itemAt().

Returns the layout item at index, or 0 if there is no layout item at this index.

QGraphicsGridLayout.removeAt (self, int index)

Reimplemented from QGraphicsLayout.removeAt().

Removes the layout item at index without destroying it. Ownership of the item is transferred to the caller.

See also addItem().

QGraphicsGridLayout.removeItem (self, QGraphicsLayoutItem item)

The item argument

Removes the layout item item without destroying it. Ownership of the item is transferred to the caller.

This function was introduced in Qt 4.8.

See also addItem().

Qt.Alignment QGraphicsGridLayout.rowAlignment (self, int row)

Returns the alignment of row.

See also setRowAlignment().

QGraphicsGridLayout.setAlignment (self, QGraphicsLayoutItem item, Qt.Alignment alignment)

Sets the alignment for item to alignment.

See also alignment().

QSizeF QGraphicsGridLayout.sizeHint (self, Qt.SizeHint which, QSizeF constraint = QSizeF())

Reimplemented from QGraphicsLayoutItem.sizeHint().

float QGraphicsGridLayout.verticalSpacing (self)

Returns the default vertical spacing for the grid layout.

See also setVerticalSpacing().

PyQt 4.9.4 for Windows

Qt 4.8.2

QGraphicsGridLayout Class Reference[QtGui module]