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authorJani Heikkinen <jani.heikkinen@qt.io>2016-11-30 13:58:46 +0200
committerJani Heikkinen <jani.heikkinen@qt.io>2016-12-09 12:14:10 +0000
commit884d06db09bc6179baa3add42ff4ef5f3cd0e523 (patch)
treef449ae044329b78b2f3ad9fb47e63ec3aaeae04d /dist
parentc66e69efa0b95b3c0220a4ec7e1f6ea72c8a160b (diff)
Add changes file for 5.8.0v5.8.0-rc1
Change-Id: I29311143b04cdd4d6a13980ccb57b7867bcf9c53 Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>
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+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().