poster.qml Example File

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  ** Copyright (C) 2015 The Qt Company Ltd.
  ** Contact: http://www.qt.io/licensing/
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  ** This file is part of the QtNfc module of the Qt Toolkit.
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  import QtQuick 2.3
  import QtNfc 5.5

  Rectangle {
      id: root
      width: 640
      height: 360

      NearField {
          id: nearfield
          property bool requiresManualPolling: false

          onPollingChanged: {
              if (!polling && requiresManualPolling)
                  polling = true; //restart polling
          }

          Component.onCompleted: {
              if (!polling) {
                  requiresManualPolling = true;
                  polling = true;
              }
          }

          filter: [
              NdefFilter { type: "U"; typeNameFormat: NdefRecord.NfcRtd; maximum: 1 },
              NdefFilter { type: "T"; typeNameFormat: NdefRecord.NfcRtd },
              NdefFilter { typeNameFormat: NdefRecord.Mime; minimum: 0; maximum: 1 }
          ]


          onMessageRecordsChanged: {
              posterText.text = "";
              posterImage.source = "";
              posterUrl.text = "";

              var currentLocaleMatch = NdefTextRecord.LocaleMatchedNone;
              var i;
              var found = false;
              for (i = 0; i < messageRecords.length; ++i) {
                  switch (messageRecords[i].typeNameFormat) {
                  case NdefRecord.NfcRtd:
                      if (messageRecords[i].type === "T") {
                          if (messageRecords[i].localeMatch > currentLocaleMatch) {
                              currentLocaleMatch = messageRecords[i].localeMatch;
                              posterText.text = messageRecords[i].text;
                              found = true;
                          }

                      } else if (messageRecords[i].type === "U") {
                           posterUrl.text = messageRecords[i].uri;
                          found = true;
                      }
                      break;
                  case NdefRecord.Mime:
                      if (messageRecords[i].type.indexOf("image/") === 0 ) {
                          posterImage.source = messageRecords[i].uri;
                          found = true;
                      }
                      break;
                  }

                  if (!found)
                      console.warn("Unknown NFC tag detected. Cannot display content.")
              }

              root.state = "show";
          }
      }

      Text {
          id: touchText
          anchors.horizontalCenter: parent.horizontalCenter
          anchors.verticalCenter: parent.verticalCenter
          text: "Touch an NFC tag with at least one Text and one URI record."
          font.bold: true
          font.pointSize: 18
          wrapMode: Text.WordWrap
          width: root.width*0.75
          horizontalAlignment: Text.AlignHCenter
      }

      Image {
          id: posterImage
          scale: Image.PreserveAspectFit
          height:  parent.height * 0.8
          width: height * sourceSize.width / sourceSize.height
          anchors.verticalCenter: parent.verticalCenter
          x: -width
          smooth: true
      }

      Text {
          id: posterText
          anchors.horizontalCenter: parent.right
          anchors.horizontalCenterOffset: - parent.width / 4
          y: -height
          font.bold: true
          font.pointSize: 18
      }

      Text {
          id: posterUrl
          anchors.horizontalCenter: parent.right
          anchors.horizontalCenterOffset: - parent.width / 4
          y: parent.height
          font.italic: true
          font.pointSize: 14
      }

      MouseArea {
          id: openMouseArea
          anchors.fill: parent
          enabled: root.state == "show"

          onClicked: Qt.openUrlExternally(posterUrl.text)

          Rectangle {
              id: testTouch
              width: 50
              height: 50
              color: "lightsteelblue"
              opacity: 0.3
              anchors.top:  parent.top
              anchors.right: close.left
              anchors.rightMargin: 10

              MouseArea {
                  id: touchMouseArea
                  anchors.fill: parent

                  onClicked: {
                      if (root.state == "") {
                          root.state = "show";
                      } else {
                          root.state = "";
                      }
                  }
              }
          }

          Rectangle {
              id: close
              width: 50
              height: 50
              color: "black"
              radius: 0
              opacity: 0.3
              anchors.top: parent.top
              anchors.topMargin: 0
              anchors.right: parent.right
              anchors.rightMargin: 0

              MouseArea {
                  id: closeMouseArea
                  anchors.fill: parent

                  onClicked: Qt.quit();
              }
          }
      }

      states: [
          State {
              name: "show"
              PropertyChanges { target: posterText; y: root.height / 3 }
              PropertyChanges { target: posterUrl; y: 2 * root.height / 3 }
              PropertyChanges { target: posterImage; x: root.width / 20 }
              PropertyChanges { target: touchText; opacity: 0 }
          }
      ]

      transitions: [
          Transition {
              PropertyAnimation { easing.type: Easing.OutQuad; properties: "x,y" }
              PropertyAnimation { property: "opacity"; duration: 125 }
          }
      ]
  }