- Qt 5.15
- Qt Quick Demo - Photo Viewer
- Qt 5.15.18 Reference Documentation

# Qt Quick Demo - Photo Viewer

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     import QtQuick 2.0
     import QtQuick.XmlListModel 2.0
     import QtQml.Models 2.1

     Component {
         id: albumDelegate
         Package {

             Item {
                 Package.name: 'browser'
                 GridView {
                     id: photosGridView; model: visualModel.parts.grid; width: mainWindow.width; height: mainWindow.height - 21
                     x: 0; y: 21; cellWidth: 160; cellHeight: 153; interactive: false
                     onCurrentIndexChanged: photosListView.positionViewAtIndex(currentIndex, ListView.Contain)
                 }
             }

             Item {
                 Package.name: 'fullscreen'
                 ListView {
                     id: photosListView; model: visualModel.parts.list; orientation: Qt.Horizontal
                     width: mainWindow.width; height: mainWindow.height; interactive: false
                     onCurrentIndexChanged: photosGridView.positionViewAtIndex(currentIndex, GridView.Contain)
                     highlightRangeMode: ListView.StrictlyEnforceRange; snapMode: ListView.SnapOneItem
                 }
             }

             Item {
                 Package.name: 'album'
                 id: albumWrapper; width: 210; height: 220

                 DelegateModel {
                     id: visualModel; delegate: PhotoDelegate { }
                     model: RssModel { id: rssModel; tags: tag }
                 }

                 BusyIndicator {
                     id: busyIndicator
                     anchors { centerIn: parent; verticalCenterOffset: -20 }
                     on: rssModel.status != XmlListModel.Ready
                 }

                 PathView {
                     id: photosPathView; model: visualModel.parts.stack; pathItemCount: 5
                     visible: !busyIndicator.visible
                     anchors.centerIn: parent; anchors.verticalCenterOffset: -30
                     path: Path {
                         PathAttribute { name: 'z'; value: 9999.0 }
                         PathLine { x: 1; y: 1 }
                         PathAttribute { name: 'z'; value: 0.0 }
                     }
                 }

                 MouseArea {
                     anchors.fill: parent
                     onClicked: mainWindow.editMode ? photosModel.remove(index) : albumWrapper.state = 'inGrid'
                 }

                 Tag {
                     anchors { horizontalCenter: parent.horizontalCenter; bottom: parent.bottom; bottomMargin: 10 }
                     frontLabel: tag; backLabel: qsTr("Remove"); flipped: mainWindow.editMode
                     onTagChanged: rssModel.tags = tag
                     onBackClicked: if (mainWindow.editMode) photosModel.remove(index);
                 }

                 states: [
                 State {
                     name: 'inGrid'
                     PropertyChanges { target: photosGridView; interactive: true }
                     PropertyChanges { target: albumsShade; opacity: 1 }
                     PropertyChanges { target: backButton; onClicked: albumWrapper.state = ''; y: 6 }
                 },
                 State {
                     name: 'fullscreen'; extend: 'inGrid'
                     PropertyChanges { target: photosGridView; interactive: false }
                     PropertyChanges { target: photosListView; interactive: true }
                     PropertyChanges { target: photosShade; opacity: 1 }
                     PropertyChanges { target: backButton; y: -backButton.height - 8 }
                 }
                 ]

                 GridView.onAdd: NumberAnimation {
                     target: albumWrapper; properties: "scale"; from: 0.0; to: 1.0; easing.type: Easing.OutQuad
                 }
                 GridView.onRemove: SequentialAnimation {
                     PropertyAction { target: albumWrapper; property: "GridView.delayRemove"; value: true }
                     NumberAnimation { target: albumWrapper; property: "scale"; from: 1.0; to: 0.0; easing.type: Easing.OutQuad }
                     PropertyAction { target: albumWrapper; property: "GridView.delayRemove"; value: false }
                 }

                 transitions: [
                 Transition {
                     from: '*'; to: 'inGrid'
                     SequentialAnimation {
                         NumberAnimation { properties: 'opacity'; duration: 250 }
                         PauseAnimation { duration: 350 }
                         NumberAnimation { target: backButton; properties: "y"; duration: 200; easing.type: Easing.OutQuad }
                     }
                 },
                 Transition {
                     from: 'inGrid'; to: '*'
                     NumberAnimation { properties: "y,opacity"; easing.type: Easing.OutQuad; duration: 300 }
                 }
                 ]
             }
         }
     }