Qt 5.6 | Qt Quick | Qt Quick Demo - Photo Viewer | PhotoDelegate.qml Example File

Qt 5.6.3 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.
      **
      ** $QT_BEGIN_LICENSE:LGPL21$
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      ** Alternatively, this file may be used under the terms of the GNU Lesser
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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'
                          }
                      }
                  }
                  ]
              }
          }
      }