Qt 5.11 | Qt Multimedia | QML Video Example | SeekControl.qml Example File

Qt 5.11.3 Reference Documentation

# SeekControl.qml Example File

multimedia/video/qmlvideo/qml/qmlvideo/SeekControl.qml

      /****************************************************************************
      **
      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Mobility Components.
      **
      ** $QT_BEGIN_LICENSE:BSD$
      ** Commercial License Usage
      ** Licensees holding valid commercial Qt licenses may use this file in
      ** accordance with the commercial license agreement provided with the
      ** Software or, alternatively, in accordance with the terms contained in
      ** a written agreement between you and The Qt Company. For licensing terms
      ** and conditions see https://www.qt.io/terms-conditions. For further
      ** information use the contact form at https://www.qt.io/contact-us.
      **
      ** BSD License Usage
      ** Alternatively, you may use this file under the terms of the BSD license
      ** as follows:
      **
      ** "Redistribution and use in source and binary forms, with or without
      ** modification, are permitted provided that the following conditions are
      ** met:
      **   * Redistributions of source code must retain the above copyright
      **     notice, this list of conditions and the following disclaimer.
      **   * Redistributions in binary form must reproduce the above copyright
      **     notice, this list of conditions and the following disclaimer in
      **     the documentation and/or other materials provided with the
      **     distribution.
      **   * Neither the name of The Qt Company Ltd nor the names of its
      **     contributors may be used to endorse or promote products derived
      **     from this software without specific prior written permission.
      **
      **
      ** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
      ** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
      ** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
      ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
      ** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
      ** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
      ** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
      ** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
      **
      ** $QT_END_LICENSE$
      **
      ****************************************************************************/

      import QtQuick 2.0

      Item {
          id: seekControl
          height: Math.min(parent.width, parent.height) / 20
          property int duration: 0
          property int playPosition: 0
          property int seekPosition: 0
          property bool enabled: true
          property bool seeking: false

          Rectangle {
              id: background
              anchors.fill: parent
              color: "white"
              opacity: 0.3
              radius: parent.height / 15
          }

          Rectangle {
              id: progressBar
              anchors { left: parent.left; top: parent.top; bottom: parent.bottom }
              width: seekControl.duration == 0 ? 0 : background.width * seekControl.playPosition / seekControl.duration
              color: "black"
              opacity: 0.7
          }

          Text {
              width: 90
              anchors { left: parent.left; top: parent.top; bottom: parent.bottom; leftMargin: 10 }
              horizontalAlignment: Text.AlignLeft
              verticalAlignment: Text.AlignVCenter
              color: "white"
              smooth: true
              text: formatTime(playPosition)
          }

          Text {
              width: 90
              anchors { right: parent.right; top: parent.top; bottom: parent.bottom; rightMargin: 10 }
              horizontalAlignment: Text.AlignRight
              verticalAlignment: Text.AlignVCenter
              color: "white"
              smooth: true
              text: formatTime(duration)
          }

          Rectangle {
              id: progressHandle
              height: parent.height
              width: parent.height / 2
              color: "white"
              opacity: 0.5
              anchors.verticalCenter: progressBar.verticalCenter
              x: seekControl.duration == 0 ? 0 : seekControl.playPosition / seekControl.duration * background.width

              MouseArea {
                  id: mouseArea
                  anchors { horizontalCenter: parent.horizontalCenter; bottom: parent.bottom }
                  height: parent.height
                  width: parent.height * 2
                  enabled: seekControl.enabled
                  drag {
                      target: progressHandle
                      axis: Drag.XAxis
                      minimumX: 0
                      maximumX: background.width
                  }
                  onPressed: {
                      seekControl.seeking = true;
                  }
                  onCanceled: {
                      seekControl.seekPosition = progressHandle.x * seekControl.duration / background.width
                      seekControl.seeking = false
                  }
                  onReleased: {
                      seekControl.seekPosition = progressHandle.x * seekControl.duration / background.width
                      seekControl.seeking = false
                      mouse.accepted = true
                  }
              }
          }

          Timer { // Update position also while user is dragging the progress handle
              id: seekTimer
              repeat: true
              interval: 300
              running: seekControl.seeking
              onTriggered: {
                  seekControl.seekPosition = progressHandle.x*seekControl.duration / background.width
              }
          }

          function formatTime(timeInMs) {
              if (!timeInMs || timeInMs <= 0) return "0:00"
              var seconds = timeInMs / 1000;
              var minutes = Math.floor(seconds / 60)
              seconds = Math.floor(seconds % 60)
              if (seconds < 10) seconds = "0" + seconds;
              return minutes + ":" + seconds
          }
      }