Qt 5.7 | Qt Multimedia | QML Camera Example | declarative-camera.qml Example File

Qt 5.7.1 Reference Documentation

# declarative-camera.qml Example File

multimedia/declarative-camera/declarative-camera.qml

      /****************************************************************************
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      ** This file is part of the examples of the Qt Toolkit.
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      import QtQuick 2.0
      import QtMultimedia 5.4

      Rectangle {
          id : cameraUI

          width: 800
          height: 480

          color: "black"
          state: "PhotoCapture"

          states: [
              State {
                  name: "PhotoCapture"
                  StateChangeScript {
                      script: {
                          camera.captureMode = Camera.CaptureStillImage
                          camera.start()
                      }
                  }
              },
              State {
                  name: "PhotoPreview"
              },
              State {
                  name: "VideoCapture"
                  StateChangeScript {
                      script: {
                          camera.captureMode = Camera.CaptureVideo
                          camera.start()
                      }
                  }
              },
              State {
                  name: "VideoPreview"
                  StateChangeScript {
                      script: {
                          camera.stop()
                      }
                  }
              }
          ]

          Camera {
              id: camera
              captureMode: Camera.CaptureStillImage

              imageCapture {
                  onImageCaptured: {
                      photoPreview.source = preview
                      stillControls.previewAvailable = true
                      cameraUI.state = "PhotoPreview"
                  }
              }

              videoRecorder {
                   resolution: "640x480"
                   frameRate: 30
              }
          }

          PhotoPreview {
              id : photoPreview
              anchors.fill : parent
              onClosed: cameraUI.state = "PhotoCapture"
              visible: cameraUI.state == "PhotoPreview"
              focus: visible
          }

          VideoPreview {
              id : videoPreview
              anchors.fill : parent
              onClosed: cameraUI.state = "VideoCapture"
              visible: cameraUI.state == "VideoPreview"
              focus: visible

              //don't load recorded video if preview is invisible
              source: visible ? camera.videoRecorder.actualLocation : ""
          }

          VideoOutput {
              id: viewfinder
              visible: cameraUI.state == "PhotoCapture" || cameraUI.state == "VideoCapture"

              x: 0
              y: 0
              width: parent.width - stillControls.buttonsPanelWidth
              height: parent.height

              source: camera
              autoOrientation: true
          }

          PhotoCaptureControls {
              id: stillControls
              anchors.fill: parent
              camera: camera
              visible: cameraUI.state == "PhotoCapture"
              onPreviewSelected: cameraUI.state = "PhotoPreview"
              onVideoModeSelected: cameraUI.state = "VideoCapture"
          }

          VideoCaptureControls {
              id: videoControls
              anchors.fill: parent
              camera: camera
              visible: cameraUI.state == "VideoCapture"
              onPreviewSelected: cameraUI.state = "VideoPreview"
              onPhotoModeSelected: cameraUI.state = "PhotoCapture"
          }
      }