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author | Qt Continuous Integration System <qt-info@nokia.com> | 2011-02-10 06:17:37 (GMT) |
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committer | Qt Continuous Integration System <qt-info@nokia.com> | 2011-02-10 06:17:37 (GMT) |
commit | abb425e3db6c20c5271788cb1ec4e1fe37b9ea5b (patch) | |
tree | 86b68eb00cd024dc7e6293dcf8329f300c83af48 /doc/src/declarative/javascriptblocks.qdoc | |
parent | fd3b8a0e008dd00e363ac173a2cfcabcab31c454 (diff) | |
parent | 27b71c5b0b432235da1931ae830e9ad52ee450e7 (diff) | |
download | Qt-abb425e3db6c20c5271788cb1ec4e1fe37b9ea5b.zip Qt-abb425e3db6c20c5271788cb1ec4e1fe37b9ea5b.tar.gz Qt-abb425e3db6c20c5271788cb1ec4e1fe37b9ea5b.tar.bz2 |
Merge branch 'qt-master-from-4.7' of scm.dev.nokia.troll.no:qt/qt-integration into master-integration
* 'qt-master-from-4.7' of scm.dev.nokia.troll.no:qt/qt-integration: (182 commits)
Fixes XPASS
Revert part of commit 7c1ab9b6a8
Fixed wrong casing of a Symbian library.
Fixed wrong static library extension on Symbian.
Fixed library casing.
Remove dependencies to pre-Symbian3 platforms from Symbian3 packages
My changes 4.7.2
Don't accept input methods when a TextEdit or TextInput is read only.
Correct error message
On windows xp using a higher port makes the declarativedebug* tests work
Correct assert
Fix qt.sis platform dependencies for Symbian^3 builds.
Fix few QFileDialog static method issues in Symbian^3
Update QDeclarative DEF files for Symbian
Export QDeclarativeRefCount so that symbian compiles.
Make Flickable's wheel handling more like QAbstractScrollArea.
Changing header or footer failed to delete the previous.
Avoid index-out-of bounds related crash in Grid
Move Qt.application docs into Qt global object page
Add initial size to ListView in FolderListModel example
...
Diffstat (limited to 'doc/src/declarative/javascriptblocks.qdoc')
-rw-r--r-- | doc/src/declarative/javascriptblocks.qdoc | 42 |
1 files changed, 10 insertions, 32 deletions
diff --git a/doc/src/declarative/javascriptblocks.qdoc b/doc/src/declarative/javascriptblocks.qdoc index d221205..65877f9 100644 --- a/doc/src/declarative/javascriptblocks.qdoc +++ b/doc/src/declarative/javascriptblocks.qdoc @@ -200,37 +200,12 @@ Likewise, the \l {Component::onDestruction} attached property is triggered on component destruction. -\section1 Property Assignment vs Property Binding +\section1 JavaScript and Property Binding -When working with both QML and JavaScript, it is important to differentiate between -QML \l {Property Binding} and JavaScript value assignment. In QML, a property -binding is created using the \e {property: value} syntax: +Property bindings can be created in JavaScript by assigning the property with a \c function +that returns the required value. -\code -Rectangle { - width: otherItem.width -} -\endcode - -The \c width of the above \l Rectangle is updated whenever \c otherItem.width changes. On the other -hand, take the following JavaScript code snippet, that runs when the \l Rectangle is created: - -\code -Rectangle { - - Component.onCompleted: { - width = otherItem.width; - } -} -\endcode - -The \c width of this \l Rectangle is \e assigned the value of \c otherItem.width using the -\e {property = value} syntax in JavaScript. Unlike the QML \e {property: value} syntax, this -does not invoke QML property binding; the \c rectangle.width property is set to the value -of \c otherItem.width at the time of the assignment and will not be updated if that value -changes. - -See \l {Property Binding} for more information. +See \l {Binding Properties from JavaScript} for details. \section1 Receiving QML Signals in JavaScript @@ -315,10 +290,13 @@ This restriction exists as the QML environment is not yet fully established. To run code after the environment setup has completed, refer to \l {Running JavaScript at Startup}. -\o The value of \c this is currently undefined in QML +\o The value of \c this is currently undefined in QML in the majority of contexts + +The \c this keyword is supported when \l {Binding Properties from JavaScript} +{binding properties from JavaScript}. In all other situations, the value of +\c this is undefined in QML. -The value of \c this is undefined in QML. To refer to any element, provide -an \c id. For example: +To refer to any element, provide an \c id. For example: \qml Item { |