Qt 5.9 | Qt Multimedia | QML Video Example | main.qml Example File

Qt 5.9.4 Reference Documentation

# main.qml Example File

multimedia/video/qmlvideo/qml/qmlvideo/main.qml

      /****************************************************************************
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      import QtQuick 2.0

      Rectangle {
          id: root
          anchors.fill: parent
          color: "black"

          property string source1
          property string source2
          property color bgColor: "black"
          property real volume: 0.25
          property bool perfMonitorsLogging: false
          property bool perfMonitorsVisible: false

          QtObject {
              id: d
              property int itemHeight: root.height > root.width ? root.width / 10 : root.height / 10
              property int buttonHeight: 0.8 * itemHeight
              property int margins: 5
          }

          Loader {
              id: performanceLoader

              Connections {
                  target: inner
                  onVisibleChanged:
                      if (performanceLoader.item)
                          performanceLoader.item.enabled = !inner.visible
                  ignoreUnknownSignals: true
              }

              function init() {
                  var enabled = root.perfMonitorsLogging || root.perfMonitorsVisible
                  source = enabled ? "../performancemonitor/PerformanceItem.qml" : ""
              }

              onLoaded: {
                  item.parent = root
                  item.anchors.fill = root
                  item.logging = root.perfMonitorsLogging
                  item.displayed = root.perfMonitorsVisible
                  item.enabled = false
                  item.init()
              }
          }

          Rectangle {
              id: inner
              anchors.fill: parent
              color: root.bgColor

              Button {
                  id: openFile1Button
                  anchors {
                      top: parent.top
                      left: parent.left
                      right: exitButton.left
                      margins: d.margins
                  }
                  bgColor: "#212121"
                  bgColorSelected: "#757575"
                  textColorSelected: "white"
                  height: d.buttonHeight
                  text: (root.source1 == "") ? "Select file 1" : root.source1
                  onClicked: fileBrowser1.show()
              }

              Button {
                  id: openFile2Button
                  anchors {
                      top: openFile1Button.bottom
                      left: parent.left
                      right: exitButton.left
                      margins: d.margins
                  }
                  bgColor: "#212121"
                  bgColorSelected: "#757575"
                  textColorSelected: "white"
                  height: d.buttonHeight
                  text: (root.source2 == "") ? "Select file 2" : root.source2
                  onClicked: fileBrowser2.show()
              }

              Button {
                  id: exitButton
                  anchors {
                      top: parent.top
                      right: parent.right
                      margins: d.margins
                  }
                  bgColor: "#212121"
                  bgColorSelected: "#757575"
                  textColorSelected: "white"
                  width: parent.width / 10
                  height: d.buttonHeight
                  text: "Exit"
                  onClicked: Qt.quit()
              }

              Row {
                  id: modes
                  anchors.top: openFile2Button.bottom
                  anchors.margins: 0
                  anchors.topMargin: 5
                  Button {
                      width: root.width / 2
                      height: 0.8 * d.itemHeight
                      bgColor: "#212121"
                      radius: 0
                      text: "Video Modes"
                      enabled: false
                  }
                  Button {
                      width: root.width / 2
                      height: 0.8 * d.itemHeight
                      bgColor: "#212121"
                      radius: 0
                      text: "Camera Modes"
                      enabled: false
                  }
              }

              Rectangle {
                  id: divider
                  height: 1
                  width: parent.width
                  color: "black"
                  anchors.top: modes.bottom
              }

              SceneSelectionPanel {
                  id: sceneSelectionPanel
                  itemHeight: d.itemHeight
                  color: "#212121"
                  anchors {
                      top: divider.bottom
                      left: parent.left
                      right: parent.right
                      bottom: parent.bottom
                  }
                  radius: 0
                  onSceneSourceChanged: {
                      sceneLoader.source = sceneSource
                      var scene = null
                      var innerVisible = true
                      if (sceneSource == "") {
                          if (performanceLoader.item)
                              performanceLoader.item.videoActive = false
                      } else {
                          scene = sceneLoader.item
                          if (scene) {
                              if (scene.contentType === "video" && source1 === "") {
                                  errorDialog.show("You must first select a video file")
                                  sceneSource = ""
                              } else {
                                  scene.parent = root
                                  scene.color = root.bgColor
                                  scene.buttonHeight = d.buttonHeight
                                  scene.source1 = source1
                                  scene.source2 = source2
                                  scene.volume = volume
                                  scene.anchors.fill = root
                                  scene.close.connect(closeScene)
                                  scene.content.initialize()
                                  innerVisible = false
                              }
                          }
                      }
                      videoFramePaintedConnection.target = scene
                      inner.visible = innerVisible
                  }
              }
          }

          Loader {
              id: sceneLoader
          }

          Connections {
              id: videoFramePaintedConnection
              onVideoFramePainted: {
                  if (performanceLoader.item)
                      performanceLoader.item.videoFramePainted()
              }
              ignoreUnknownSignals: true
          }

          FileBrowser {
              id: fileBrowser1
              anchors.fill: root
              onFolderChanged: fileBrowser2.folder = folder
              Component.onCompleted: fileSelected.connect(root.openFile1)
          }

          FileBrowser {
              id: fileBrowser2
              anchors.fill: root
              onFolderChanged: fileBrowser1.folder = folder
              Component.onCompleted: fileSelected.connect(root.openFile2)
          }

          function openFile1(path) {
              root.source1 = path
          }

          function openFile2(path) {
              root.source2 = path
          }

          ErrorDialog {
              id: errorDialog
              anchors.fill: root
              dialogWidth: d.itemHeight * 5
              dialogHeight: d.itemHeight * 3
              enabled: false
          }

          // Called from main() once root properties have been set
          function init() {
              performanceLoader.init()
              fileBrowser1.folder = videoPath
              fileBrowser2.folder = videoPath
          }

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

          function closeScene() {
              sceneSelectionPanel.sceneSource = ""
          }
      }