Qt Quick Demo - Photo Viewer

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 import QtQuick 2.2
 import QtQuick.Controls 1.1
 import QtQml.Models 2.1
 import "PhotoViewerCore"

 ApplicationWindow {
     id: mainWindow

     visible: true

     Rectangle {
         focus: true

         Keys.onBackPressed: {
             event.accepted = true
             backButton.clicked()
         }
     }

     property real downloadProgress: 0
     property bool imageLoading: false
     property bool editMode: false

     width: 800; height: 480; color: "#d5d6d8"

     ListModel {
         id: photosModel
         ListElement { tag: "Flowers" }
         ListElement { tag: "Wildlife" }
         ListElement { tag: "Prague" }
     }

     DelegateModel { id: albumVisualModel; model: photosModel; delegate: AlbumDelegate {} }

     GridView {
         id: albumView; width: parent.width; height: parent.height; cellWidth: 210; cellHeight: 220
         model: albumVisualModel.parts.album; visible: albumsShade.opacity != 1.0
     }

     Column {
         spacing: 20; anchors { bottom: parent.bottom; right: parent.right; rightMargin: 20; bottomMargin: 20 }
         Button {
             id: newButton; label: qsTr("Add"); rotation: 3
             anchors.horizontalCenter: parent.horizontalCenter
             onClicked: {
                 mainWindow.editMode = false
                 photosModel.append( { tag: "" } )
                 albumView.positionViewAtIndex(albumView.count - 1, GridView.Contain)
             }
         }
         Button {
             id: deleteButton; label: qsTr("Edit"); rotation: -2;
             onClicked: mainWindow.editMode = !mainWindow.editMode
             anchors.horizontalCenter: parent.horizontalCenter
         }
         Button {
             id: quitButton; label: qsTr("Quit"); rotation: -2;
             onClicked: Qt.quit()
             anchors.horizontalCenter: parent.horizontalCenter
         }
     }

     Rectangle {
         id: albumsShade; color: mainWindow.color
         width: parent.width; height: parent.height; opacity: 0.0
     }

     ListView { anchors.fill: parent; model: albumVisualModel.parts.browser; interactive: false }

     Button {
         id: backButton
         label: qsTr("Back")
         rotation: 3
         x: parent.width - backButton.width - 6
         y: -backButton.height - 8
         visible: Qt.platform.os !== "android"
     }

     Rectangle { id: photosShade; color: 'black'; width: parent.width; height: parent.height; opacity: 0; visible: opacity != 0.0 }

     ListView { anchors.fill: parent; model: albumVisualModel.parts.fullscreen; interactive: false }

     Item { id: foreground; anchors.fill: parent }

     ProgressBar {
         progress: mainWindow.downloadProgress; width: parent.width; height: 4
         anchors.bottom: parent.bottom; opacity: mainWindow.imageLoading; visible: opacity != 0.0
     }
 }