Qt 5.9 | Qt Multimedia | QML Video Shader Effects Example | Main.qml Example File

Qt 5.9.4 Reference Documentation

# Main.qml Example File

multimedia/video/qmlvideofx/qml/qmlvideofx/Main.qml

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      import QtQuick 2.1
      import QtQuick.Window 2.1

      Rectangle {
          id: root
          color: "black"
          property string fileName
          property alias volume: content.volume
          property bool perfMonitorsLogging: false
          property bool perfMonitorsVisible: false
          property int pixDens: Math.ceil(Screen.pixelDensity)
          property int itemWidth: 25 * pixDens
          property int itemHeight: 10 * pixDens
          property int windowWidth: Screen.desktopAvailableWidth
          property int windowHeight: Screen.desktopAvailableHeight
          property int scaledMargin: 2 * pixDens
          property int fontSize: 5 * pixDens

          QtObject {
              id: d
              property real gripSize: 20
          }

          Content {
              id: content
              color: "transparent"
              anchors {
                  top: parent.top
                  left: parent.left
                  right: parent.right
                  bottom: parameterPanel.top
                  margins: scaledMargin
                  leftMargin: scaledMargin + itemHeight
              }
              gripSize: d.gripSize
          }

          ParameterPanel {
              id: parameterPanel
              anchors {
                  left: parent.left
                  right: effectName.left
                  bottom: parent.bottom
                  margins: scaledMargin
                  leftMargin: scaledMargin + itemHeight
              }
              gripSize: d.gripSize
              height: root.itemHeight * 2.5
              width: root.itemWidth * 3
          }

          Button {
              id: effectName
              anchors {
                          right: parent.right
                          bottom: perfHolder.top
                          margins: scaledMargin
                      }

              text: "No effect"
              width: itemWidth * 2
              height: itemHeight
              onClicked: {
                  effectName.visible = false
                  listview.visible = true
                  lvbg.visible = true
              }
              color: "#303030"
          }

          Rectangle {
              id: lvbg
              width: itemWidth * 2
              color: "black"
              opacity: 0.8
              visible: false

              anchors {
                          right: parent.right
                          bottom: perfHolder.top
                          top: parent.top
                          margins: scaledMargin
                      }

              ListView {
                  id: listview
                  width: itemWidth * 2
                  anchors.fill: parent
                  visible: false

                  model: EffectSelectionList {}
                  delegate: effectDelegate

                  clip: true
                  focus: true

                  Component {
                      id: effectDelegate
                      Button {
                          text: name
                          width: itemWidth * 2
                          onClicked: {
                              content.effectSource = source
                              listview.visible = false
                              lvbg.visible = false
                              effectName.text = name
                              effectName.visible = true
                              parameterPanel.model = content.effect.parameters

                          }
                      }
                  }
              }
          }

          Rectangle {
              id: perfHolder
              color: "transparent"
              anchors {
                  right: parent.right
                  bottom: parent.bottom
                  margins: scaledMargin
              }
              height: root.itemHeight * 1.5
              width: root.itemWidth

              Loader {
                  id: performanceLoader
                  function init() {
                      var enabled = root.perfMonitorsLogging || root.perfMonitorsVisible
                      source = enabled ? "../performancemonitor/PerformanceItem.qml" : ""
                  }
                  onLoaded: {
                      item.parent = perfHolder
                      item.anchors.top = perfHolder.top
                      item.anchors.bottom = perfHolder.bottom
                      item.anchors.left = perfHolder.left
                      item.anchors.right = perfHolder.right
                      item.logging = root.perfMonitorsLogging
                      item.displayed = root.perfMonitorsVisible
                      item.init()
                  }
              }
          }

          FileOpen {
              id: fileOpen
              state: "collapsed"
              anchors {
                  left: parent.left
                  top: parent.top
                  bottom: parent.bottom
                  margins: scaledMargin
              }
              width: itemHeight + scaledMargin
              z: 2
              opacity: 0.9

              states: [
                  State {
                      name: "expanded"
                      PropertyChanges {
                          target: fileOpen
                          width: itemWidth * 1.5
                          opacity: 0.8
                      }
                  },
                  State {
                      name: "collapsed"
                      PropertyChanges {
                          target: fileOpen
                          width: itemHeight + scaledMargin
                          opacity: 0.9
                      }
                  }
              ]

              transitions: [
                  Transition {
                      NumberAnimation { target: fileOpen; property: "width"; duration: 100 }
                      NumberAnimation { target: fileOpen; property: "opacity"; duration: 100 }
                  }
              ]
          }

          FileBrowser {
              id: imageFileBrowser
              anchors.fill: root
              Component.onCompleted: fileSelected.connect(content.openImage)
          }

          FileBrowser {
              id: videoFileBrowser
              anchors.fill: root
              Component.onCompleted: fileSelected.connect(content.openVideo)
          }

          Component.onCompleted: {
              fileOpen.openImage.connect(openImage)
              fileOpen.openVideo.connect(openVideo)
              fileOpen.openCamera.connect(openCamera)
              fileOpen.close.connect(close)
          }

          function init() {
              if (Qt.platform.os === "linux" || Qt.platform.os === "windows" || Qt.platform.os === "osx" || Qt.platform.os === "unix") {
                  if (Screen.desktopAvailableWidth > 1280) {
                      windowWidth = 1280
                  }
                  if (Screen.desktopAvailableHeight > 720) {
                      windowHeight = 720
                  }
              }

              height = windowHeight
              width = windowWidth

              imageFileBrowser.folder = imagePath
              videoFileBrowser.folder = videoPath
              content.init()
              performanceLoader.init()
              if (fileName != "")
                  content.openVideo(fileName)
          }

          function qmlFramePainted() {
              if (performanceLoader.item)
                  performanceLoader.item.qmlFramePainted()
          }

          function openImage() {
              imageFileBrowser.show()
          }

          function openVideo() {
              videoFileBrowser.show()
          }

          function openCamera() {
              content.openCamera()
          }

          function close() {
              content.init()
          }
      }