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Diffstat (limited to 'src/widgets/graphicsview/qgraphicsgridlayout.cpp')
| -rw-r--r-- | src/widgets/graphicsview/qgraphicsgridlayout.cpp | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/widgets/graphicsview/qgraphicsgridlayout.cpp b/src/widgets/graphicsview/qgraphicsgridlayout.cpp index dbd5407b90..139ccf3af8 100644 --- a/src/widgets/graphicsview/qgraphicsgridlayout.cpp +++ b/src/widgets/graphicsview/qgraphicsgridlayout.cpp @@ -11,13 +11,16 @@ \inmodule QtWidgets 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 + on the heap, passing a parent widget to the constructor, then add widgets + and layouts by calling addItem(). QGraphicsGridLayout automatically computes the dimensions of the grid as you add items. \snippet code/src_gui_graphicsview_qgraphicsgridlayout.cpp 0 + Alternatively, if you do not pass a parent widget to the layout's constructor, + you will need to call QGraphicsWidget::setLayout() to set this layout as the + top-level layout for that widget, the widget will take ownership of the layout. + 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. |