- Qt 5.5
- Qt NFC
- QML Poster Example
- poster.qml Example File
- Qt 5.5.1 Reference Documentation

# poster.qml Example File

poster/poster.qml

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the QtNfc module of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:BSD$
    ** 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 2.3
    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; minimum: 1; maximum: 1 },
                NdefFilter { type: "T"; typeNameFormat: NdefRecord.NfcRtd; minimum: 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"
            font.bold: true
            font.pointSize: 18
        }

        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 }
            }
        ]
    }