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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** 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 Nokia Corporation 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

GridView {
    id: root
    width: 360; height: 360
    cellWidth: 90; cellHeight: 90

    model: VisualDataModel {
        id: visualModel
        model: ListModel {
            id: colorModel
            ListElement { color: "blue" }
            ListElement { color: "green" }
            ListElement { color: "red" }
            ListElement { color: "yellow" }
            ListElement { color: "orange" }
            ListElement { color: "purple" }
            ListElement { color: "cyan" }
            ListElement { color: "magenta" }
            ListElement { color: "chartreuse" }
            ListElement { color: "aquamarine" }
            ListElement { color: "indigo" }
            ListElement { color: "black" }
            ListElement { color: "chartreuse" }
            ListElement { color: "violet" }
            ListElement { color: "grey" }
            ListElement { color: "springgreen" }
        }

        delegate: MouseArea {
            id: delegateRoot

            property int visualIndex: VisualDataModel.itemsIndex

            width: 90; height: 90
            drag.target: icon

            Rectangle {
                id: icon
                width: 80; height: 80
                anchors {
                    horizontalCenter: parent.horizontalCenter;
                    verticalCenter: parent.verticalCenter
                }
                color: model.color
                radius: 3

                Drag.active: delegateRoot.pressed
                Drag.source: delegateRoot
                Drag.hotSpot.x: 40
                Drag.hotSpot.y: 40

                states: [
                    State {
                        when: icon.Drag.active
                        ParentChange {
                            target: icon
                            parent: root
                        }

                        AnchorChanges {
                            target: icon;
                            anchors.horizontalCenter: undefined;
                            anchors.verticalCenter: undefined
                        }
                    }
                ]
            }

            DropArea {
                anchors { fill: parent; margins: 15 }

                onEntered: visualModel.items.move(drag.source.visualIndex, delegateRoot.visualIndex)
            }
        }
    }
}