173 lines
7.5 KiB
Plaintext
173 lines
7.5 KiB
Plaintext
Qt 5.8 introduces many new features and improvements as well as bugfixes
|
|
over the 5.7.x series. For more details, refer to the online documentation
|
|
included in this distribution. The documentation is also available online:
|
|
|
|
http://doc.qt.io/qt-5/index.html
|
|
|
|
The Qt version 5.8 series is binary compatible with the 5.7.x series.
|
|
Applications compiled for 5.7 will continue to run with 5.8.
|
|
|
|
Some of the changes listed in this file include issue tracking numbers
|
|
corresponding to tasks in the Qt Bug Tracker:
|
|
|
|
https://bugreports.qt.io/
|
|
|
|
Each of these identifiers can be entered in the bug tracker to obtain more
|
|
information about a particular change.
|
|
|
|
****************************************************************************
|
|
* General *
|
|
****************************************************************************
|
|
- [QTBUG-54982] Add qmlRegisterUncreatableMetaObject convenience function
|
|
needed to register Q_NAMESPACE QMetaObjects.
|
|
|
|
****************************************************************************
|
|
* Important Behavior Changes *
|
|
****************************************************************************
|
|
|
|
- [QTBUG-52012] When the engine looks for QML modules / extension
|
|
plugins in statically linked applications, the plugins are not
|
|
instantiated in the qml loader thread anymore. For this to work
|
|
however it is necessary for plugins to use
|
|
Q_PLUGIN_METADATA(IID_QQmlExtensionInterface_iid) in their class
|
|
declaration instead of hardcoding the interface id as a string literal.
|
|
|
|
- A JS null value converted to a QVariant now has type
|
|
QMetaType::Nullptr rather than QMetaType::VoidStar.
|
|
|
|
- To improve the start-up time and reduce memory consumption, the QML engine
|
|
attempts to cache the code and data structures generated during loading of
|
|
.qml and .js files. Cache files are - if possible - written to disk in the
|
|
directory next to the source file with the .qmlc/.jsc extension. If that
|
|
is not possible, they are written to QStandardPaths::CacheLocation.
|
|
|
|
|
|
****************************************************************************
|
|
* Library *
|
|
****************************************************************************
|
|
|
|
QtQml
|
|
-----
|
|
|
|
- [QTBUG-53412] Fix mapping of null JS values to null SQL values instead
|
|
of empty strings.
|
|
- [QTBUG-53794] Fix crash when using the "with" statement with an
|
|
expression that throws an exception.
|
|
- [QTBUG-54589] Fix assertion when deleting properties of JS objects
|
|
- [QTBUG-54360] Added exit(int retCode) method to the Qt global object. An
|
|
application can call Qt.exit to specify a return code of the engine.
|
|
- QQmlXMLHttpRequest:
|
|
* [QTBUG-38175] QQmlXMLHttpRequest now supports the PATCH method in HTTP
|
|
requests.
|
|
- Fix reading of enum properties from gadgets / value types when the
|
|
enum was registered with qRegisterMetaType().
|
|
- Fixed support for using namespaces in property types, signal parameter names
|
|
and list types
|
|
- Fixed support for declaring default properties of type list<T>
|
|
|
|
|
|
QtQuick
|
|
-------
|
|
|
|
- QQuickWindow:
|
|
* The relevant child item is now sent a hover event when the window
|
|
receives a QEnterEvent, making sure hovering is recognized without
|
|
waiting for mouse movement.
|
|
- [QTBUG-50298] Added Qt.application.font property.
|
|
- QQuickWidget now properly repaints text on high-DPI screen changes.
|
|
- [QTBUG-54238] qt.scenegraph.info logging category got renamed to
|
|
qt.scenegraph.general.
|
|
- ShaderEffect with OpenGL now supports reading GLSL shader sources from
|
|
local files and from the resource system. Whenever a fragmentShader or
|
|
vertexShader property is a valid such URL, the value is treated as a
|
|
file specification instead of actual source code.
|
|
- The threaded scene graph renderer does not sleep up to one vsync
|
|
interval before the first frame anymore.
|
|
- [QTBUG-48723] Added properties to access color values for the HSV and
|
|
HSL color models to the basic QML color type.
|
|
- MouseArea no longer thinks it's pressed when it does not accept the
|
|
press event. When a press event is not accepted, MouseArea also no
|
|
longer receives a cancel event.
|
|
- Touch events are now delivered in a well defined order: New touch points
|
|
are delivered first to items under the finger which was first touching
|
|
the screen. Then to items that are under the second finger and finally
|
|
to common ancestors. This means that items that are "on top" will get a
|
|
chance to grab touch points before any items in the background.
|
|
- [QTBUG-39888] Fix crash with QQuickItems created via JavaScript being
|
|
garbage collected sometimes when they're not assigned to a window.
|
|
|
|
- Drag:
|
|
* [QTBUG-37366] Added imageSource property to attached Drag object: this
|
|
allows drag sources to specify the pixmap to be drawn next to the
|
|
mouse cursor when starting a drag and drop operation.
|
|
|
|
- Important Behavior Changes:
|
|
* [QTBUG-54133] QQuickWidget now follows the same behavior as
|
|
QQuickWindow when it comes to the persistent scenegraph setting
|
|
controlled by QQuickWindow::setPersistentSceneGraph(). In earlier
|
|
releases the setting was ignored and the scenegraph was torn down on
|
|
every hide event. This is not the case anymore.
|
|
* [QTBUG-54133] QQuickWidget now behaves identically to QOpenGLWidget
|
|
when it comes to handling window changes when reparenting the widget
|
|
into a hierarchy belonging to another top-level widget. Previously the
|
|
OpenGL context always got destroyed and recreated in order to ensure
|
|
texture resource sharing with the new top-level widget. From now on
|
|
this is only true when when AA_ShareOpenGLContexts it not set.
|
|
|
|
- LayoutMirroring:
|
|
* [QTBUG-55517] Made it possible to attach LayoutMirroring to a Window.
|
|
|
|
- MouseArea:
|
|
* [QTBUG-40475][QTBUG-42194][QTBUG-33982][QTBUG-42578][QTBUG-52537]
|
|
Hover state is now updated once per frame. This means that
|
|
MouseArea::containsMouse property will now be correct even if the
|
|
mouse is not moving, but items move under the cursor. Likewise the
|
|
mouse position properties and positionChanged signal will act as if
|
|
the mouse had moved.
|
|
|
|
- QQuickItem:
|
|
* [QTBUG-31861] Fixed issue with mouse button events being sent even
|
|
when they were disabled by setAcceptedMouseButtons.
|
|
|
|
- QQuickWindow:
|
|
* QQuickWindow::sendEvent() is deprecated. Use
|
|
QCoreApplication::sendEvent() directly instead.
|
|
|
|
- ShaderEffect:
|
|
* Add new mesh type BorderImageMesh. BorderImageMesh provides an
|
|
optimized way to use BorderImage-type images with ShaderEffect.
|
|
|
|
- Text:
|
|
* [QTBUG-52389] Fixed clipping of glyphs that extend beyond font's em
|
|
square.
|
|
* [QTBUG-54723] Fixed a performance regression when rendering a rich
|
|
text item with scaled images.
|
|
* [QTBUG-43133] Fixed placement of flowing text objects in the start of
|
|
a right-to-left block.
|
|
|
|
|
|
|
|
QML Elements
|
|
------------
|
|
|
|
- Added a LoggingCategory type and added support for it to the console
|
|
object
|
|
|
|
- Binding:
|
|
* Add delayed property to Binding as a way to avoid potentially expensive
|
|
or unexpected intermediate values.
|
|
|
|
- Text, TextEdit, TextInput:
|
|
* Added "hintingPreference" property
|
|
|
|
- Platform Specific Changes:
|
|
* [Windows][QTBUG-45321] Worked around an issue with fonts that have corrupt
|
|
cmap tables.
|
|
|
|
QtTest
|
|
------
|
|
|
|
- TestCase:
|
|
* [QTBUG-19708] Added tryVerify() function to allow verification of
|
|
asynchronous conditions that can't be tested using tryCompare().
|