Add a basic Switch control

This is a very simple switch. I left out text label as this is
very mobile oriented. A clicked signal is also debatable
as you dont really click on a switch.

Change-Id: I84269297cba48f0e81af8f25af5b97acadecdd6a
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>

1 files changed, 153 insertions, 0 deletions

diff --git a/src/controls/Switch.qml b/src/controls/Switch.qml
new file mode 100644
index 000000000..87cdc0c30
--- /dev/null
+++ b/src/controls/Switch.qml
@@ -0,0 +1,153 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the Qt Quick Controls module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names
+**     of its contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.1
+import QtQuick.Controls 1.1
+import QtQuick.Controls.Private 1.0
+
+/*!
+    \qmltype Switch
+    \inqmlmodule QtQuick.Controls
+    \since QtQuick.Controls 1.1
+    \ingroup controls
+    \brief A switch.
+
+    A Switch is an option button that can be switched on (checked) or off
+    (unchecked). Switches are typically used to represent features in an
+    application that can be enabled or disabled without affecting others.
+
+    On mobile platforms, switches are commonly used to enable or disable
+    features.
+
+    \qml
+    Column {
+        Switch { checked: true }
+        Switch { checked: false }
+    }
+    \endqml
+
+    You can create a custom appearance for a Switch by
+    assigning a \l SwitchStyle.
+*/
+
+Control {
+    id: root
+
+    /*!
+        This property is \c true if the control is checked.
+        The default value is \c false.
+    */
+    property bool checked: false
+
+    /*!
+        This property is \c true if the control takes the focus when it is
+        pressed; \l{QQuickItem::forceActiveFocus()}{forceActiveFocus()} will be
+        called on the control.
+    */
+    property bool activeFocusOnPress: false
+
+    /*!
+        This property stores the ExclusiveGroup that the control belongs to.
+    */
+    property ExclusiveGroup exclusiveGroup: null
+
+    Keys.onPressed: {
+        if (event.key === Qt.Key_Space && !event.isAutoRepeat)
+            checked = !checked;
+    }
+
+    /*! \internal */
+    onExclusiveGroupChanged: {
+        if (exclusiveGroup)
+            exclusiveGroup.bindCheckable(root)
+    }
+
+    MouseArea {
+        id: internal
+
+        property Item handle: __panel ? __panel.__handle : null
+        property int min: __style ? __style.padding.left : 0
+        property int max: handle.parent.width - (handle ? handle.width : 0) -
+                          ( __style ? __style.padding.right : 0)
+        focus: true
+        anchors.fill: parent
+        drag.threshold: 0
+        drag.target: handle
+        drag.axis: Drag.XAxis
+        drag.minimumX: min
+        drag.maximumX: max
+
+        onPressed: {
+            if (activeFocusOnPress)
+                root.forceActiveFocus()
+        }
+
+        onReleased: {
+            if (drag.active) {
+                checked = (handle.x < max/2) ? false : true;
+                internal.handle.x = checked ? internal.max : internal.min
+            } else {
+                checked = (handle.x === max) ? false : true
+            }
+        }
+    }
+
+    Component.onCompleted: {
+        internal.handle.x = checked ? internal.max : internal.min
+        __panel.enableAnimation = true
+    }
+
+    onCheckedChanged:  {
+        if (internal.handle)
+            internal.handle.x = checked ? internal.max : internal.min
+    }
+
+    activeFocusOnTab: true
+    Accessible.role: Accessible.CheckBox
+    Accessible.name: "switch"
+
+    /*!
+        The style that should be applied to the switch. Custom style
+        components can be created with:
+
+        \codeline Qt.createComponent("path/to/style.qml", switchId);
+    */
+    style: Qt.createComponent(Settings.style + "/SwitchStyle.qml", root)
+}