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**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
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** This file is part of the examples of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:BSD$
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**     the documentation and/or other materials provided with the
**     distribution.
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**     of its contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
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import QtQuick 2.0
import QtQuick.Dialogs 1.0
import QtQuick.Window 2.1
import Qt.labs.folderlistmodel 1.0

Window {
    id: root
    visible: true
    width: 1024; height: 600
    color: "black"
    property int highestZ: 0
    property real defaultSize: 200
    property var currentFrame: undefined

    FileDialog {
        id: fileDialog
        title: "Choose a folder with some images"
        selectFolder: true
        onAccepted: folderModel.folder = fileUrl + "/"
    }

    Repeater {
        model: FolderListModel {
            id: folderModel
            objectName: "folderModel"
            showDirs: false
            nameFilters: ["*.png", "*.jpg", "*.gif"]
        }
        Rectangle {
            id: photoFrame
            width: image.width * image.scale + 20
            height: image.height * image.scale + 20
            border.color: "black"
            border.width: 2
            smooth: true
            antialiasing: true
            x: Math.random() * root.width - defaultSize
            y: Math.random() * root.height - defaultSize
            rotation: Math.random() * 13 - 6
            Image {
                id: image
                anchors.centerIn: parent
                fillMode: Image.PreserveAspectFit
                source: folderModel.folder + fileName
                scale: defaultSize / Math.max(sourceSize.width, sourceSize.height)
                antialiasing: true
            }
            PinchArea {
                anchors.fill: parent
                pinch.target: photoFrame
                pinch.minimumRotation: -360
                pinch.maximumRotation: 360
                pinch.minimumScale: 0.1
                pinch.maximumScale: 10
                onPinchStarted: setFrameColor();
                MouseArea {
                    id: dragArea
                    hoverEnabled: true
                    anchors.fill: parent
                    drag.target: photoFrame
                    onPressed: {
                        photoFrame.z = ++root.highestZ;
                        parent.setFrameColor();
                    }
                    onEntered: parent.setFrameColor();
                    onWheel: {
                        if (wheel.modifiers & Qt.ControlModifier) {
                            photoFrame.rotation += wheel.angleDelta.y / 120 * 5;
                            if (Math.abs(photoFrame.rotation) < 4)
                                photoFrame.rotation = 0;
                        } else {
                            photoFrame.rotation += wheel.angleDelta.x / 120;
                            if (Math.abs(photoFrame.rotation) < 0.6)
                                photoFrame.rotation = 0;
                            var scaleBefore = image.scale;
                            image.scale += image.scale * wheel.angleDelta.y / 120 / 10;
                            photoFrame.x -= image.width * (image.scale - scaleBefore) / 2.0;
                            photoFrame.y -= image.height * (image.scale - scaleBefore) / 2.0;
                        }
                    }
                }
                function setFrameColor() {
                    if (currentFrame)
                        currentFrame.border.color = "black";
                    currentFrame = photoFrame;
                    currentFrame.border.color = "red";
                }
            }
        }
    }

    Image {
        anchors.top: parent.top
        anchors.left: parent.left
        anchors.margins: 10
        source: "resources/folder.png"
        MouseArea {
            anchors.fill: parent
            anchors.margins: -10
            onClicked: fileDialog.open()
        }
    }

    Text {
        anchors.bottom: parent.bottom
        anchors.left: parent.left
        anchors.right: parent.right
        anchors.margins: 10
        color: "darkgrey"
        wrapMode: Text.WordWrap
        font.pointSize: 8
        text: "On a touchscreen: use two fingers to zoom and rotate, one finger to drag\n" +
              "With a mouse: drag normally, use the vertical wheel to zoom, horizontal wheel to rotate, or hold Ctrl while using the vertical wheel to rotate"
    }

    Component.onCompleted: fileDialog.open()
}