summaryrefslogtreecommitdiffstats
path: root/src/declarative/graphicsitems/qdeclarativeitem.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativeitem.cpp')
-rw-r--r--src/declarative/graphicsitems/qdeclarativeitem.cpp43
1 files changed, 21 insertions, 22 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativeitem.cpp b/src/declarative/graphicsitems/qdeclarativeitem.cpp
index 51eb5f2..95a4fd6 100644
--- a/src/declarative/graphicsitems/qdeclarativeitem.cpp
+++ b/src/declarative/graphicsitems/qdeclarativeitem.cpp
@@ -728,41 +728,39 @@ void QDeclarativeKeyNavigationAttached::keyReleased(QKeyEvent *event, bool post)
\since 4.7
\brief The Keys attached property provides key handling to Items.
- All visual primitives support key handling via the \e Keys
- attached property. Keys can be handled via the \e onPressed
- and \e onReleased signal properties.
+ All visual primitives support key handling via the Keys
+ attached property. Keys can be handled via the onPressed
+ and onReleased signal properties.
The signal properties have a \l KeyEvent parameter, named
\e event which contains details of the event. If a key is
handled \e event.accepted should be set to true to prevent the
event from propagating up the item hierarchy.
- \code
- Item {
- focus: true
- Keys.onPressed: {
- if (event.key == Qt.Key_Left) {
- console.log("move left");
- event.accepted = true;
- }
- }
- }
- \endcode
+ \section1 Example Usage
+
+ The following example shows how the general onPressed handler can
+ be used to test for a certain key; in this case, the left cursor
+ key:
+
+ \snippet doc/src/snippets/declarative/keys/keys-pressed.qml key item
Some keys may alternatively be handled via specific signal properties,
for example \e onSelectPressed. These handlers automatically set
\e event.accepted to true.
- \code
- Item {
- focus: true
- Keys.onLeftPressed: console.log("move left")
- }
- \endcode
+ \snippet doc/src/snippets/declarative/keys/keys-handler.qml key item
+
+ See \l{Qt::Key}{Qt.Key} for the list of keyboard codes.
- See \l {Qt::Key}{Qt.Key} for the list of keyboard codes.
+ \section1 Key Handling Priorities
- If priority is Keys.BeforeItem (default) the order of key event processing is:
+ The Keys attached property can be configured to handle key events
+ before or after the item it is attached to. This makes it possible
+ to intercept events in order to override an item's default behavior,
+ or act as a fallback for keys not handled by the item.
+
+ If \l priority is Keys.BeforeItem (default) the order of key event processing is:
\list 1
\o Items specified in \c forwardTo
@@ -773,6 +771,7 @@ void QDeclarativeKeyNavigationAttached::keyReleased(QKeyEvent *event, bool post)
\endlist
If priority is Keys.AfterItem the order of key event processing is:
+
\list 1
\o Item specific key handling, e.g. TextInput key handling
\o Items specified in \c forwardTo