Add changes file for 5.9.0

Listing important changes and bug-fixes.

Change-Id: I3ec64adb238e5e0ad328a6abbfcba0431916d608
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>

1 files changed, 208 insertions, 0 deletions

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+Qt 5.9 introduces many new features and improvements as well as bugfixes
+over the 5.8.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 5.9 series is binary compatible with the 5.8.x series.
+Applications compiled for 5.8 will continue to run with 5.9.
+
+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.
+
+****************************************************************************
+*                   Important Behavior Changes                             *
+****************************************************************************
+
+ - Added multi-touch support for buttons and sliders. It is now possible to
+   touch-interact with multiple sliders and buttons at the same time.
+ - By popular demand, Slider, RangeSlider, and Dial have been changed to
+   report live value updates by default. This can be disabled by setting the
+   "live" property to false.
+ - [QTBUG-59920] Sliders and Dials now react immediately when using a
+   mouse. Now the initial drag threshold applies only on touch, to avoid
+   conflicting with flickables.
+ - [QTBUG-58667] ScrollBar now reacts immediately when using a mouse.
+ - [QTBUG-59629] Set explicit cursors on all interactive controls.
+
+****************************************************************************
+*                          Controls                                        *
+****************************************************************************
+
+ - AbstractButton:
+   * Added support for multi-touch.
+   * [QTBUG-57203] Added a toggled() signal that is emitted whenever a
+     checkable button is interactively toggled by the user by using either
+     touch, mouse, or keys.
+
+ - ApplicationWindow:
+   * [QTBUG-58932] The "data" property has been renamed to contentData, as it
+     was documented. Notice that a "data" property still exists in QML
+     Window, but is no longer overshadowed in ApplicationWindow.
+
+ - Control:
+   * [QTBUG-50992] Resolved the "Object destroyed during incubation" issue
+     that occurred randomly when customizing built-in delegates.
+
+ - ComboBox:
+   * [QTBUG-53876] Added "editable" property.
+   * Added "down" property.
+
+ - DelayButton:
+   * Added DelayButton that incorporates a delay before the button becomes
+     activated, to prevent accidental triggers.
+
+ - Dial:
+   * Added a "live" property that determines whether the dial provides live
+     updates for the "value" property while the handle is dragged.
+   * Added support for wheel handling when wheelEnabled is set to true.
+   * [QTBUG-57203] Added a moved() signal that is emitted whenever the dial
+     is interactively moved by the user by using either touch, mouse, or
+     keys.
+   * Fixed handling of inverted wheel events (natural touchpad scrolling
+     direction on macOS).
+
+ - Drawer:
+   * [QTBUG-53169] Added "interactive" property that specifies whether the
+     drawer reacts to swipes. This can be used to make drawer a
+     non-closable persistent side-bar.
+
+ - Menu:
+   * Fixed populating Menus with a Repeater.
+
+ - Popup:
+   * Allowed passing a Window as a parent when creating dynamic Popup
+     instances using eg. Component.createObject(). Previously, Popup
+     assumed the parent to be an Item, and would complain "cannot find
+     any window to open popup in" if a Window was passed.
+   * [QTBUG-58196] Allowed dynamic window changes after construction.
+   * Fixed the CloseOnRelease close policy for non-modal popups.
+
+ - RangeSlider:
+   * Added a "live" property that determines whether the range slider
+     provides live updates for the first.value and second.value properties
+     while the respective handle is dragged.
+
+ - ScrollBar:
+   * [QTBUG-56569] Added snapMode property for incremental or discrete
+     scrolling.
+   * Added an "interactive "property. A non-interactive ScrollBar is visually
+     and behaviorally similar to ScrollIndicator. This property is useful
+     for switching between typical mouse- and touch-orientated UIs with
+     interactive and non- interactive scroll bars, respectively.
+   * Added a "policy" property, which holds whether the scroll bar is shown
+     always/never/as needed (default).
+
+ - ScrollView:
+   * Added ScrollView. On touch, ScrollView enables flicking and makes
+     the scroll bars non-interactive. When interacted with a mouse device,
+     flicking is disabled and the scroll bars are interactive.
+
+ - Slider:
+   * Added support for multi-touch.
+   * Added a "live" property that determines whether the slider provides live
+     updates for the "value" property while the handle is dragged.
+   * [QTBUG-57203] Added a moved() signal that is emitted whenever the
+     slider is interactively moved by the user by using either touch,
+     mouse, wheel, or keys.
+   * Fixed handling of inverted wheel events (natural touchpad scrolling
+     direction on macOS).
+
+ - SpinBox:
+   * [QTBUG-56837] Added inputMethodHints and inputMethodComposing
+     properties for controlling the input method when using editable spin
+     boxes.
+   * [QTBUG-57203] Added a valueModified() signal that is emitted whenever
+     the value of a spin box has been interactively modified by the user by
+     using either touch, mouse, wheel, or keys.
+   * [QTBUG-60356] Forwarded focus to the internal editor of an editable
+     spin box.
+
+ - StackView:
+   * [QTBUG-56801] Added attached "StackView.visible" property that can be
+     used to control whether items below the top- most item are kept
+     visible.
+   * [QTBUG-57266] Prevented pushing duplicate items.
+   * [QTBUG-59034] Fixed pop/replace exit transition leak, sometimes leading
+     to random crashes since a transition could have been left running in the
+     background at destruction time.
+   * [QTBUG-59098] Prevented StackView filtering mouse ungrab events to avoid
+     MouseAreas being stuck in the pressed state.
+   * [QTBUG-59634] Improved component creation errors by using the standard
+     QML warning system that gives a context/location for the error.
+
+ - SwipeDelegate:
+   * [QTBUG-57192] Added "swipe.enabled" property to allow disabling of
+     swiping.
+   * Added swipe.open(side) method that can be used to programmatically
+     open the side item on the specified side, which can be either
+     SwipeDelegate.Left or SwipeDelegate.Right.
+   * Added swipe.opened() and swipe.closed() signals, which are emitted
+     when the delegate has been opened or closed by swipe, and the
+     respective transition has finished.
+   * Added a swipe.transition property that holds the transition that is
+     applied when a swipe is released, or swipe.open() or swipe.close() is
+     called.
+
+ - SwipeView:
+   * [QTBUG-56031] Added "orientation" property.
+
+ - TabBar:
+   * [QTBUG-57858] Added contentWidth and contentHeight properties that are
+     automatically calculated based on the total size of the tab items, but
+     can be manually overridden if desired. This fixes an issue that TabBar
+     was not able to reliably calculate an implicit size, and could in
+     certain scenarios enter an infinite loop due to a circular dependency
+     between the items' sizes and the tabbar's size.
+
+ - TextArea:
+   * [QTBUG-55999] Fixed the horizontal alignment of the placeholder text
+     in right-to-left UIs.
+   * TextArea has been made to work inside ScrollView, providing necessary
+     scroll bars out of the box.
+
+ - TextField:
+   * [QTBUG-55999] Fixed the horizontal alignment of the placeholder text
+     in right-to-left UIs.
+
+ - Tumbler:
+   * Added a "moving" property that describes whether the tumbler is
+     currently moving, due to the user either dragging or flicking the
+     tumbler.
+
+****************************************************************************
+*                          Styles                                          *
+****************************************************************************
+
+ - Added support for a QT_QUICK_CONTROLS_STYLE_PATH environment variable,
+   which can be used to specify lookup paths for Qt Quick Controls 2
+   styles. This allows device manufacturers and Linux distributions to
+   specify a system-wide style installation folder that may be located
+   outside the Qt installation tree.
+ - Added support for a QT_QUICK_CONTROLS_STYLE_CONF environment variable,
+   which can be used to override the default location of the Qt Quick
+   2 Controls configuration file (:/qtquickcontrols2.conf).
+ - QQuickStyle:
+   * Added availableStyles() method that returns the list of available
+     built-in styles.
+
+Default
+--------
+ - Visualized RangeSliders's range.
+
+Material
+--------
+ - [QTBUG-58797] Fixed cursor visibility for read-only editors.
+
+****************************************************************************
+*                          Platform                                        *
+****************************************************************************
+
+ - Menu:
+   * Fixed sub-menu handling when using the Qt Widgets fallbacks on
+     platforms that do not support native menus (Windows, for example).