- Qt 5.3
- Qt Quick
- Qt Quick Demo - Photo Surface
- photosurface.qml Example File
- Qt 5.3.2 Reference Documentation

# photosurface.qml Example File

demos/photosurface/photosurface.qml

    /****************************************************************************
    **
    ** 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
    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

        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
                    onPinchFinished: photoFrame.border.color = "black";
                    MouseArea {
                        id: dragArea
                        hoverEnabled: true
                        anchors.fill: parent
                        drag.target: photoFrame
                        onPressed: photoFrame.z = ++root.highestZ;
                        onEntered: photoFrame.border.color = "red";
                        onExited: photoFrame.border.color = "black";
                        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;
                            }
                        }
                    }
                }
            }
        }

        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()
    }