- Qt 5.5
- Qt Quick
- Qt Quick Demo - Photo Viewer
- PhotoDelegate.qml Example File
- Qt 5.5.1 Reference Documentation

# PhotoDelegate.qml Example File

demos/photoviewer/PhotoViewerCore/PhotoDelegate.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the QtQml module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
    ** Licensees holding valid commercial Qt licenses may use this file in
    ** accordance with the commercial license agreement provided with the
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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
    ** General Public License version 2.1 or version 3 as published by the Free
    ** Software Foundation and appearing in the file LICENSE.LGPLv21 and
    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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    import QtQuick 2.0
    import "script/script.js" as Script

    Package {
        Item { id: stackItem; Package.name: 'stack'; width: 160; height: 153; z: stackItem.PathView.z }
        Item { id: listItem; Package.name: 'list'; width: mainWindow.width + 40; height: 153 }
        Item { id: gridItem; Package.name: 'grid'; width: 160; height: 153 }

        Item {
            width: 160; height: 153

            Item {
                id: photoWrapper

                property double randomAngle: Math.random() * (2 * 6 + 1) - 6
                property double randomAngle2: Math.random() * (2 * 6 + 1) - 6

                x: 0; y: 0; width: 140; height: 133
                z: stackItem.PathView.z; rotation: photoWrapper.randomAngle

                BorderImage {
                    anchors {
                        fill: originalImage.status == Image.Ready ? border : placeHolder
                        leftMargin: -6; topMargin: -6; rightMargin: -8; bottomMargin: -8
                    }
                    source: 'images/box-shadow.png'
                    border.left: 10; border.top: 10; border.right: 10; border.bottom: 10
                }
                Rectangle {
                    id: placeHolder

                    property int w: Script.getWidth(content)
                    property int h: Script.getHeight(content)
                    property double s: Script.calculateScale(w, h, photoWrapper.width)

                    color: 'white'; anchors.centerIn: parent; antialiasing: true
                    width:  w * s; height: h * s; visible: originalImage.status != Image.Ready
                    Rectangle {
                        color: "#878787"; antialiasing: true
                        anchors { fill: parent; topMargin: 3; bottomMargin: 3; leftMargin: 3; rightMargin: 3 }
                    }
                }
                Rectangle {
                    id: border; color: 'white'; anchors.centerIn: parent; antialiasing: true
                    width: originalImage.paintedWidth + 6; height: originalImage.paintedHeight + 6
                    visible: !placeHolder.visible
                }
                BusyIndicator { anchors.centerIn: parent; on: originalImage.status != Image.Ready }
                Image {
                    id: originalImage; antialiasing: true;
                    source: "http://" + Script.getImagePath(content); cache: false
                    fillMode: Image.PreserveAspectFit; width: photoWrapper.width; height: photoWrapper.height
                }
                Image {
                    id: hqImage; antialiasing: true; source: ""; visible: false; cache: false
                    fillMode: Image.PreserveAspectFit; width: photoWrapper.width; height: photoWrapper.height
                }
                Binding {
                    target: mainWindow; property: "downloadProgress"; value: hqImage.progress
                    when: listItem.ListView.isCurrentItem
                }
                Binding {
                    target: mainWindow; property: "imageLoading"
                    value: (hqImage.status == Image.Loading) ? 1 : 0; when: listItem.ListView.isCurrentItem
                }
                MouseArea {
                    width: originalImage.paintedWidth; height: originalImage.paintedHeight; anchors.centerIn: originalImage
                    onClicked: {
                        if (albumWrapper.state == 'inGrid') {
                            gridItem.GridView.view.currentIndex = index;
                            albumWrapper.state = 'fullscreen'
                        } else {
                            gridItem.GridView.view.currentIndex = index;
                            albumWrapper.state = 'inGrid'
                        }
                    }
                }

                states: [
                State {
                    name: 'stacked'; when: albumWrapper.state == ''
                    ParentChange { target: photoWrapper; parent: stackItem; x: 10; y: 10 }
                    PropertyChanges { target: photoWrapper; opacity: stackItem.PathView.onPath ? 1.0 : 0.0 }
                },
                State {
                    name: 'inGrid'; when: albumWrapper.state == 'inGrid'
                    ParentChange { target: photoWrapper; parent: gridItem; x: 10; y: 10; rotation: photoWrapper.randomAngle2 }
                },
                State {
                    name: 'fullscreen'; when: albumWrapper.state == 'fullscreen'
                    ParentChange {
                        target: photoWrapper; parent: listItem; x: 0; y: 0; rotation: 0
                        width: mainWindow.width; height: mainWindow.height
                    }
                    PropertyChanges { target: border; opacity: 0 }
                    PropertyChanges { target: hqImage; source: listItem.ListView.isCurrentItem ? hq : ""; visible: true }
                }
                ]

                transitions: [
                Transition {
                    from: 'stacked'; to: 'inGrid'
                    SequentialAnimation {
                        PauseAnimation { duration: 10 * index }
                        ParentAnimation {
                            target: photoWrapper; via: foreground
                            NumberAnimation {
                                target: photoWrapper; properties: 'x,y,rotation,opacity'; duration: 600; easing.type: 'OutQuart'
                            }
                        }
                    }
                },
                Transition {
                    from: 'inGrid'; to: 'stacked'
                    ParentAnimation {
                        target: photoWrapper; via: foreground
                        NumberAnimation { properties: 'x,y,rotation,opacity'; duration: 600; easing.type: 'OutQuart' }
                    }
                },
                Transition {
                    from: 'inGrid'; to: 'fullscreen'
                    SequentialAnimation {
                        PauseAnimation { duration: gridItem.GridView.isCurrentItem ? 0 : 600 }
                        ParentAnimation {
                            target: photoWrapper; via: foreground
                            NumberAnimation {
                                targets: [ photoWrapper, border ]
                                properties: 'x,y,width,height,opacity,rotation'
                                duration: gridItem.GridView.isCurrentItem ? 600 : 1; easing.type: 'OutQuart'
                            }
                        }
                    }
                },
                Transition {
                    from: 'fullscreen'; to: 'inGrid'
                    ParentAnimation {
                        target: photoWrapper; via: foreground
                        NumberAnimation {
                            targets: [ photoWrapper, border ]
                            properties: 'x,y,width,height,rotation,opacity'
                            duration: gridItem.GridView.isCurrentItem ? 600 : 1; easing.type: 'OutQuart'
                        }
                    }
                }
                ]
            }
        }
    }