diff options
Diffstat (limited to 'src/widgets/graphicsview/qgraphicsitem.cpp')
| -rw-r--r-- | src/widgets/graphicsview/qgraphicsitem.cpp | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/src/widgets/graphicsview/qgraphicsitem.cpp b/src/widgets/graphicsview/qgraphicsitem.cpp index 300e2f492b..03f22a270f 100644 --- a/src/widgets/graphicsview/qgraphicsitem.cpp +++ b/src/widgets/graphicsview/qgraphicsitem.cpp @@ -2447,7 +2447,12 @@ void QGraphicsItemPrivate::setVisibleHelper(bool newVisible, bool explicitly, Items are visible by default; it is unnecessary to call setVisible() on a new item. - \sa isVisible(), show(), hide() + \note An item with opacity set to 0 will still be considered visible, + although it will be treated like an invisible item: mouse events will pass + through it, it will not be included in the items returned by + QGraphicsView::items(), and so on. However, the item will retain the focus. + + \sa isVisible(), show(), hide(), setOpacity() */ void QGraphicsItem::setVisible(bool visible) { @@ -2715,7 +2720,11 @@ qreal QGraphicsItem::effectiveOpacity() const with the parent: ItemIgnoresParentOpacity and ItemDoesntPropagateOpacityToChildren. - \sa opacity(), effectiveOpacity() + \note Setting the opacity of an item to 0 will not make the item invisible + (according to isVisible()), but the item will be treated like an invisible + one. See the documentation of setVisible() for more information. + + \sa opacity(), effectiveOpacity(), setVisible() */ void QGraphicsItem::setOpacity(qreal opacity) { @@ -9782,6 +9791,7 @@ QVariant QGraphicsPixmapItem::extension(const QVariant &variant) const using textWidth(). \note In order to align HTML text in the center, the item's text width must be set. + Otherwise, you can call adjustSize() after setting the item's text. \image graphicsview-textitem.png |