Add ButtonRow and ButtonColumn

- Add ButtonGroup.js which contains the logic behind ButtonRow/Column
- Code taken from desktop qt-components

Signed-off-by: Daker Fernandes Pinheiro <dakerfp@gmail.com>

declarativeimports/plasmacomponents/ButtonColumn.qml

@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Components project.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import Qt 4.7
+import "ButtonGroup.js" as Behavior
+
+/*
+   Class: ButtonColumn
+   A ButtonColumn allows you to group Buttons in a column. It provides a selection-behavior as well.
+
+   Note: This component don't support the enabled property.
+   If you need to disable it you should disable all the buttons inside it.
+
+   <code>
+       ButtonColumn {
+           Button { text: "Top" }
+           Button { text: "Bottom" }
+       }
+   </code>
+*/
+Column {
+    id: root
+
+    /*
+     * Property: exclusive
+     * [bool=true] Specifies the grouping behavior. If enabled, the checked property on buttons contained
+     * in the group will be exclusive.
+     *
+     * Note that a button in an exclusive group will allways be checkable
+     */
+    property bool exclusive: true
+
+    /*
+     * Property: checkedButton
+     * [string] Contains the last checked Button.
+     */
+    property Item checkedButton;
+
+    Component.onCompleted: {
+        Behavior.create(root, {direction: Qt.Vertical});
+    }
+
+    Component.onDestruction: {
+        Behavior.destroy();
+    }
+
+}

declarativeimports/plasmacomponents/ButtonGroup.js

@@ -0,0 +1,178 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Components project.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+var self;
+var checkHandlers = [];
+var visibleButtons = [];
+var nonVisibleButtons = [];
+var direction;
+
+function create(that, options) {
+    self = that;
+    direction = options.direction || Qt.Horizontal;
+    self.childrenChanged.connect(rebuild);
+//    self.widthChanged.connect(resizeChildren);
+    build();
+}
+
+function isButton(item) {
+    if (item && item.hasOwnProperty("__position"))
+        return true;
+    return false;
+}
+
+function hasChecked(item) {
+    return (item && item.hasOwnProperty("checked"));
+}
+
+function destroy() {
+    self.childrenChanged.disconnect(rebuild);
+//    self.widthChanged.disconnect(resizeChildren);
+    cleanup();
+}
+
+function build() {
+    visibleButtons = [];
+    nonVisibleButtons = [];
+
+    for (var i = 0, item; (item = self.children[i]); i++) {
+        if (!hasChecked(item))
+            continue;
+
+        item.visibleChanged.connect(rebuild); // Not optimal, but hardly a bottleneck in your app
+        if (!item.visible) {
+            nonVisibleButtons.push(item);
+            continue;
+        }
+        visibleButtons.push(item);
+
+        if (self.exclusive && item.hasOwnProperty("checkable"))
+            item.checkable = true;
+
+        if (self.exclusive) {
+            item.checked = false;
+            checkHandlers.push(checkExclusive(item));
+            item.checkedChanged.connect(checkHandlers[checkHandlers.length - 1]);
+        }
+    }
+
+    var nrButtons = visibleButtons.length;
+    if (nrButtons == 0)
+        return;
+
+    if (self.checkedButton)
+        self.checkedButton.checked = true;
+    else if (self.exclusive) {
+        self.checkedButton = visibleButtons[0];
+        self.checkedButton.checked = true;
+    }
+
+    if (nrButtons == 1) {
+        finishButton(visibleButtons[0], "only");
+    } else {
+        finishButton(visibleButtons[0], direction == Qt.Horizontal ? "leftmost" : "top");
+        for (var i = 1; i < nrButtons - 1; i++)
+            finishButton(visibleButtons[i], direction == Qt.Horizontal ? "h_middle": "v_middle");
+        finishButton(visibleButtons[nrButtons - 1], direction == Qt.Horizontal ? "rightmost" : "bottom");
+    }
+}
+
+function finishButton(button, position) {
+    if (isButton(button)) {
+        button.__position = position;
+        if (direction == Qt.Vertical) {
+            button.anchors.left = self.left     //mm How to make this not cause binding loops? see QTBUG-17162
+            button.anchors.right = self.right
+        }
+    }
+}
+
+function cleanup() {
+    visibleButtons.forEach(function(item, i) {
+        if (checkHandlers[i])
+            item.checkedChanged.disconnect(checkHandlers[i]);
+        item.visibleChanged.disconnect(rebuild);
+    });
+    checkHandlers = [];
+
+    nonVisibleButtons.forEach(function(item, i) {
+        item.visibleChanged.disconnect(rebuild);
+    });
+}
+
+function rebuild() {
+    if (self == undefined)
+        return;
+
+    cleanup();
+    build();
+}
+
+function resizeChildren() {
+    if (direction != Qt.Horizontal)
+        return;
+
+    var extraPixels = self.width % visibleButtons;
+    var buttonSize = (self.width - extraPixels) / visibleButtons;
+    visibleButtons.forEach(function(item, i) {
+        if (!item || !item.visible)
+            return;
+        item.width = buttonSize + (extraPixels > 0 ? 1 : 0);
+        if (extraPixels > 0)
+            extraPixels--;
+    });
+}
+
+function checkExclusive(item) {
+    var button = item;
+    return function() {
+        for (var i = 0, ref; (ref = visibleButtons[i]); i++) {
+            if (ref.checked == (button === ref))
+                continue;
+
+            // Disconnect the signal to avoid recursive calls
+            ref.checkedChanged.disconnect(checkHandlers[i]);
+            ref.checked = !ref.checked;
+            ref.checkedChanged.connect(checkHandlers[i]);
+        }
+        self.checkedButton = button;
+    }
+}

declarativeimports/plasmacomponents/ButtonRow.qml

@@ -0,0 +1,84 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the Qt Components project.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** GNU Lesser General Public License Usage
+** This file may be used under the terms of the GNU Lesser General Public
+** License version 2.1 as published by the Free Software Foundation and
+** appearing in the file LICENSE.LGPL included in the packaging of this
+** file. Please review the following information to ensure the GNU Lesser
+** General Public License version 2.1 requirements will be met:
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU General
+** Public License version 3.0 as published by the Free Software Foundation
+** and appearing in the file LICENSE.GPL included in the packaging of this
+** file. Please review the following information to ensure the GNU General
+** Public License version 3.0 requirements will be met:
+** http://www.gnu.org/copyleft/gpl.html.
+**
+** Other Usage
+** Alternatively, this file may be used in accordance with the terms and
+** conditions contained in a signed written agreement between you and Nokia.
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 1.1
+import "ButtonGroup.js" as Behavior
+
+/*
+   Class: ButtonRow
+   A ButtonRow allows you to group Buttons in a row. It provides a selection-behavior as well.
+
+   Note: This component don't support the enabled property.
+   If you need to disable it you should disable all the buttons inside it.
+
+   <code>
+       ButtonRow {
+           Button { text: "Left" }
+           Button { text: "Right" }
+       }
+   </code>
+*/
+Row {
+    id: root
+
+    /*
+     * Property: exclusive
+     * [bool=true] Specifies the grouping behavior. If enabled, the checked property on buttons contained
+     * in the group will be exclusive.
+     *
+     * Note that a button in an exclusive group will allways be checkable
+     */
+    property bool exclusive: true
+
+    /*
+     * Property: checkedButton
+     * [string] Contains the last checked Button.
+     */
+    property Item checkedButton;
+
+    Component.onCompleted: {
+        Behavior.create(root, {direction: Qt.Horizontal});
+    }
+
+    Component.onDestruction: {
+        Behavior.destroy();
+    }
+}

declarativeimports/plasmacomponents/qmldir

@@ -1,5 +1,8 @@
 BusyIndicator 0.1 BusyIndicator.qml
 Button 0.1 Button.qml
+ButtonGroup 0.1 ButtonGroup.js
+ButtonRow 0.1 ButtonRow.qml
+ButtonColumn 0.1 ButtonColumn.qml
 CheckBox 0.1 CheckBox.qml
 DualStateButton 0.1 DualStateButton.qml
 FlashingLabel 0.1 FlashingLabel.qml

declarativeimports/test/Gallery.qml

@@ -249,6 +249,34 @@ Rectangle {
                     }
                 }
             }
+
+            Column {
+                spacing: 20
+
+                Text {
+                    font.pixelSize: 20
+                    text: "Button Row"
+                }
+
+                PlasmaComponents.ButtonRow {
+                    spacing: 20
+                    PlasmaComponents.RadioButton { text: "A" }
+                    PlasmaComponents.RadioButton { text: "B" }
+                    PlasmaComponents.RadioButton { text: "C" }
+                }
+
+                Text {
+                    font.pixelSize: 20
+                    text: "Button Column"
+                }
+
+                PlasmaComponents.ButtonColumn {
+                    spacing: 20
+                    PlasmaComponents.RadioButton { text: "Alice" }
+                    PlasmaComponents.RadioButton { text: "Bob" }
+                    PlasmaComponents.RadioButton { text: "Charles" }
+                }
+            }
         }
     }