Support activeFocusOnTab in QQuickItem

Add activeFocusOnTab as property to QQuickItem. Setting the
property allows automatic keyboard navigation between all
elements that have it set.

This key event handler will only be called after the QML key
handlers, such as KeyNavigation and Keys, and the C++ key
event handlers, such as keyPressEvent function.

Algorithm is most done by Frederik Gladhorn, in cooperation with
Gabriel de Dietrich.

Done-with: Frederik Gladhorn <frederik.gladhorn@digia.com>
Done-with: Gabriel de Dietrich <gabriel.dedietrich@digia.com>
Change-Id: I8b58be9c20d113661fe85d27bdb1af84340d9de5
Reviewed-by: Alan Alpert (Personal) <416365416c@gmail.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>

4 files changed, 142 insertions, 12 deletions

diff --git a/examples/quick/keyinteraction/focus/Core/GridMenu.qml b/examples/quick/keyinteraction/focus/Core/GridMenu.qml
index 3dd0637344..e18ec1f0d3 100644
--- a/examples/quick/keyinteraction/focus/Core/GridMenu.qml
+++ b/examples/quick/keyinteraction/focus/Core/GridMenu.qml
@@ -45,7 +45,7 @@ FocusScope {
 
     onActiveFocusChanged: {
         if (activeFocus) 
-            mainView.state = ""
+            mainView.state = "showGridViews"
     }
 
     Rectangle {
@@ -63,6 +63,7 @@ FocusScope {
             focus: true
             model: 12
 
+            KeyNavigation.up: tabMenu
             KeyNavigation.down: listMenu
             KeyNavigation.left: contextMenu
 
diff --git a/examples/quick/keyinteraction/focus/Core/TabMenu.qml b/examples/quick/keyinteraction/focus/Core/TabMenu.qml
new file mode 100644
index 0000000000..5eea611b44
--- /dev/null
+++ b/examples/quick/keyinteraction/focus/Core/TabMenu.qml
@@ -0,0 +1,104 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples 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 2.0
+
+FocusScope {
+    onActiveFocusChanged: {
+        if (activeFocus) 
+            mainView.state = "showTabViews"
+    }
+
+    Rectangle {
+        anchors.fill: parent
+        clip: true
+        gradient: Gradient {
+            GradientStop { position: 0.0; color: "#193441" }
+            GradientStop { position: 1.0; color: Qt.darker("#193441") }
+        }
+
+        Row {
+            id: tabView
+            anchors.fill: parent; anchors.leftMargin: 20; anchors.rightMargin: 20
+            Repeater {
+                activeFocusOnTab: false
+                model: 5
+                Item {
+                    id: container
+                    width: 152; height: 152
+                    activeFocusOnTab: true
+                    focus: true
+
+                    KeyNavigation.up: listMenu
+                    KeyNavigation.down: gridMenu
+
+                    Rectangle {
+                        id: content
+                        color: "transparent"
+                        antialiasing: true
+                        anchors.fill: parent; anchors.margins: 20; radius: 10
+
+                        Rectangle { color: "#91AA9D"; anchors.fill: parent; anchors.margins: 3; radius: 8; antialiasing: true }
+                        Image { source: "images/qt-logo.png"; anchors.centerIn: parent }
+                    }
+
+                    MouseArea {
+                        id: mouseArea
+                        anchors.fill: parent
+                        hoverEnabled: true
+
+                        onClicked: {
+                            container.forceActiveFocus()
+                        }
+                    }
+
+                    states: State {
+                        name: "active"; when: container.activeFocus
+                        PropertyChanges { target: content; color: "#FCFFF5"; scale: 1.1 }
+                    }
+
+                    transitions: Transition {
+                        NumberAnimation { properties: "scale"; duration: 100 }
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/examples/quick/keyinteraction/focus/focus.qml b/examples/quick/keyinteraction/focus/focus.qml
index 193b3d7b3a..91fb146e40 100644
--- a/examples/quick/keyinteraction/focus/focus.qml
+++ b/examples/quick/keyinteraction/focus/focus.qml
@@ -44,7 +44,7 @@ import "Core"
 Rectangle {
     id: window
     
-    width: 800; height: 480
+    width: 800; height: 640
     color: "#3E606F"
 
     FocusScope {
@@ -53,17 +53,24 @@ Rectangle {
         width: parent.width; height: parent.height
         focus: true
 
-        GridMenu {
-            id: gridMenu
-            width: parent.width; height: 320
+        TabMenu {
+            id: tabMenu
+            y: 160; width: parent.width; height: 160
 
             focus: true
-            interactive: parent.activeFocus
+            activeFocusOnTab: true
+        }
+
+        GridMenu {
+            id: gridMenu
+            y: 320; width: parent.width; height: 320
+            activeFocusOnTab: true
         }
 
         ListMenu {
             id: listMenu
-            y: 320; width: parent.width; height: 320
+            y: 640; width: parent.width; height: 320
+            activeFocusOnTab: true
         }
 
         Rectangle { 
@@ -73,11 +80,28 @@ Rectangle {
             opacity: 0 
         }
 
-        states: State {
-            name: "showListViews"
-            PropertyChanges { target: gridMenu; y: -160 }
-            PropertyChanges { target: listMenu; y: 160 }
-        }
+        states:  [
+            State {
+                name: "showTabViews"
+                PropertyChanges { target: tabMenu; y:  160 }
+                PropertyChanges { target: gridMenu; y: 320 }
+                PropertyChanges { target: listMenu; y: 640 }
+            },
+
+            State {
+                name: "showGridViews"
+                PropertyChanges { target: tabMenu; y:    0 }
+                PropertyChanges { target: gridMenu; y: 160 }
+                PropertyChanges { target: listMenu; y: 480 }
+            },
+
+            State {
+                name: "showListViews"
+                PropertyChanges { target: tabMenu; y: -160 }
+                PropertyChanges { target: gridMenu; y: 0 }
+                PropertyChanges { target: listMenu; y: 320 }
+            }
+        ]
 
         transitions: Transition {
             NumberAnimation { properties: "y"; duration: 600; easing.type: Easing.OutQuint }
diff --git a/examples/quick/keyinteraction/keyinteraction.qrc b/examples/quick/keyinteraction/keyinteraction.qrc
index 21bde4472c..c719654835 100644
--- a/examples/quick/keyinteraction/keyinteraction.qrc
+++ b/examples/quick/keyinteraction/keyinteraction.qrc
@@ -8,5 +8,6 @@
         <file>focus/Core/GridMenu.qml</file>
         <file>focus/Core/ListMenu.qml</file>
         <file>focus/Core/ListViewDelegate.qml</file>
+        <file>focus/Core/TabMenu.qml</file>
     </qresource>
 </RCC>