tennis.qml Example File

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 ** This file is part of the examples of the Qt Mobility Components.
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 import Qt 4.7
 import QtMobility.connectivity 1.2
 import Controller 1.0

 Rectangle {
     id: bounds

     property BluetoothService currentService
     property alias minimalDiscovery: myModel.minimalDiscovery
     property alias uuidFilder: myModel.uuidFilter
     property color fg: "white"
     property color bg: "black"

     Rectangle {
         id: page

         width: 640
         height: 360
         color: bg
         focus:  true

         // client side

         BluetoothDiscoveryModel {
             id: myModel

             function connect(s){
                 socket.setService(s);
                 socket.setConnected(true);
             }

             discovery: false
             minimalDiscovery: true
             //onDiscoveryChanged: console.log("Discovery: " + discovery)
             onNewServiceDiscovered: { connect(service); discovery = false; }
             uuidFilter: "e8e10f95-1a70-4b27-9ccf-02010264e9c9"
        }

 //       BluetoothService {
 //            id: btservice

 //            deviceAddress: "00:1A:9F:92:9E:5A"
 //            serviceUuid: "e8e10f95-1a70-4b27-9ccf-02010264e9c9"
 //       }

        BluetoothSocket {
            id: socket

            function parse(s){
                var args  = s.split(" ");

                if(args[0] == "m"){
                    ball.x = args[1]-ball.width/2;
                    ball.y = args[2]-ball.height/2;
                }
                else if(args[0] == "l"){
                    leftPaddle.y = Number(args[1])+topBumper.height;
                }
                else if(args[0] == "s"){
                    scoreLeft.text = args[1];
                    scoreRight.text = args[2];
                }
                else if(args[0] == "e"){ // echo packet, check for RTT
                    socket.sendStringData(s);
                }
                else if(args[0] == "E"){
                    var d = new Date();

                    var lag = d.getTime() - args[1];
                    if(lag > 250){
                        statusText.text = "LAG! " + lag + "ms";
                    }
                }
            }

            //connected: true
 //           service: btservice

            onStateChanged: console.log("New socket state " + state);
            onErrorChanged: { statusText.text = error; }
            onServiceChanged: console.log("New service");
            onConnectedChanged: {
                console.log("Connected: " + connected);
                if(connected) {
                     statusText.text = "Connected";
                    controller.stop();
                }
                else {
                    statusText.text = "Unconnected " + error;
                    controller.start();
                    controller.refresh();
                }
            }
            //onConnectedChanged: console.log("Connected changed");
            onDataAvailable: parse(socket.stringData);
        }

        Timer {
            id: lagTimer

            function sendEcho() {
                if(socket.connected){
                     var s = "E " + new Date().getTime();
                     socket.sendStringData(s);
                }
                if(server_socket.connected){
                    var s = "e " + new Date().getTime();
                    server_socket.sendStringData(s);
                }
            }

            interval: 1000
            repeat: true
            running: socket.connected || server_socket.connected
            onTriggered: sendEcho();
        }

        // server side, not implemented

        BluetoothService {
             id: btserver

             serviceName: "bttennis"
             serviceDescription: "QML Tennis Service"
             serviceProtocol: "l2cap"
             serviceUuid: "e8e10f95-1a70-4b27-9ccf-02010264e9c9"
             registered: true
             onNewClient: {
                 console.log("Got a new connections!");
                 if (!server_socket.connected) {
                     assignNextClient(server_socket);
                 } else {
                     nextClient().connected = false;
                 }
             }
        }

        BluetoothSocket {
            id: server_socket

            function parse(s){
                var args  = s.split(" ");

                if(args[0] == "r"){
                    rightPaddle.y = Number(args[1])+topBumper.height;
                }
                else if(args[0] == "E"){ // echo packet, check for RTT
                    sendStringData(s);
                }
                else if(args[0] == "E"){
                    var d = new Date();

                    var lag = d.getTime() - args[1];
                    if(lag > 250){
                        statusText.text = "LAG! " + lag + "ms";
                    }
                }
            }

            onStateChanged: console.log("SERVER: New socket state " + state);
            onErrorChanged: { console.log("SERVER: error: " + error); statusText.text = error; }
            onServiceChanged: console.log("SERVER: New service");
            onConnectedChanged: {
                console.log("SERVER Connected: " + connected);
                if(connected) {
                     statusText.text = "Server Connected";
                     controller.refresh();
                }
                else {
                    statusText.text = "Server Unconnected " + error;
                }
            }
            onDataAvailable: parse(stringData);
        }

        Connections {
            target: deviceSensor.item
            onReadingChanged: {
                 if (x >= 20 && x <= 70)
                     rightPaddle.paddlePos = ((x - 20) / 50 * page.height) - rightPaddle.height / 2;
            }
        }

        Handover {
            id: handover

            bluetoothService: BluetoothService {
                serviceName: "bttennis"
                serviceProtocol: "l2cap";
                serviceUuid: "e8e10f95-1a70-4b27-9ccf-02010264e9c9"
            }

            onBluetoothServiceChanged: {
                console.log("Connecting to NFC provided address " + bluetoothService.deviceAddress);
                statusText.text = "Connecting: " + bluetoothService.deviceAddress + " " + bluetoothService.serverPort;
                socket.setService(bluetoothService);
                socket.setConnected(true);
            }

            onAvailableChanged: statusText.text = "Touch to play";
        }

        MouseArea {
            anchors.fill: parent
            enabled:  true

            onMousePositionChanged: {
                var y = mouseY-rightPaddle.height/2;
                var p = server_socket.connected ? leftPaddle : rightPaddle;

                if(y < topBumper.height)
                    y = topBumper.height;
                if(y > page.height - bottomBumper.height - rightPaddle.height)
                    y = page.height - bottomBumper.height - rightPaddle.height;
                p.paddlePos = y;
            }
        }

        ConnectButton {
            id: connectButton

            mymodel: myModel
            socket: socket
            server_socket: server_socket
        }

         // Make a ball to bounce
         Rectangle {
             id: ball

             x: page.width/2-width/2;
             y: page.height/2-height/2;
             width: 12; height: 12; z: 1
             color: fg
         }

         Paddle {
             id: leftPaddle

             property int lastsent: 0

             onPaddleMoved: {
                 controller.moveLeftPaddle(y);
                 if (server_socket.connected) {
                     var c = Math.round(y-topBumper.height);
                     if (c == lastsent){
                         return;
                     }
                     lastsent = c;
                     server_socket.sendStringData("l " + c);
                 }
             }
         }

         Paddle {
             id: rightPaddle

             x: page.width - 12;

             onPaddleMoved:  {
                 if(socket.connected)
                     socket.sendStringData("r " + Math.round(rightPaddle.y-topBumper.height));
                 controller.moveRightPaddle(y);
             }

         }
         Bumper {
             id: topBumper
         }
         Bumper {
             id: bottomBumper
             y: page.height-height
         }
         Score {
             id: scoreLeft
         }
         Score {
             id: scoreRight
             x: 3*page.width/4-paintedWidth/2
         }

         Repeater {
             model: page.height / 8
             Rectangle { color: fg; x: page.width/2; y: index * 8; width: 2; height: 5 }
         }

         Text {
             id: statusText
             font.family: "Old English"
             font.pixelSize: 25; font.bold: true
             text: ""
             color:  fg
             y: page.height-height-25
             x: 24

             onTextChanged: NumberAnimation { target: statusText; property: "opacity"; easing.type: Easing.InOutSine; from: 1; to: 0; duration: 2000 }
         }

         Keys.onPressed: {
             var p = server_socket.connected ? leftPaddle : rightPaddle;

             if(event.key == Qt.Key_Up){
                 p.paddlePos -= 20;
                 event.accepted = true;
             }
             else if(event.key == Qt.Key_Down){
                 p.paddlePos += 20;
                 event.accepted = true;
             }
         }

         Loader {
             id: deviceSensor
             source: "sensor.qml"
         }

         transform: Scale { xScale: bounds.width/page.width; yScale: bounds.height/page.height }

         Controller {
             id: controller

             property bool dir: true;
             property int lastx: page.width/2;

             onMoveBall: {
                 ball.x = x-ball.width/2;
                 ball.y = y-ball.height/2;
                 if((ball.x+ball.width > rightPaddle.x) &&
                    (ball.y+ball.width > rightPaddle.y) &&
                    (ball.y < rightPaddle.y + rightPaddle.height)){
                     ballCollision(4);

                 }
                 else if((ball.x < leftPaddle.width) &&
                         (ball.y+ball.width > leftPaddle.y) &&
                         (ball.y < leftPaddle.y + leftPaddle.height)){
                     ballCollision(3);

                 }
                 else if(ball.x > page.width){
                     scored(4);
                 }
                 else if(x < 0){
                     scored(3);
                 }
                 else if(ball.y < topBumper.height){
                     ballCollision(1);
                 }
                 else if((y + ball.height/2) > bottomBumper.y){
                     ballCollision(2);
                 }
                 if(lastx > x){
                     dir = true;
                 }
                 else {
                     dir = false;
                 }
                 lastx = x;

                 if (!socket.connected && !server_socket.connected){
                     if(dir && ball.x < page.width/2) {
                         leftPaddle.paddlePos = ball.y - leftPaddle.height/2;
                     }
                     else if(!dir && ball.x > page.width/2){
                         rightPaddle.paddlePos = ball.y - leftPaddle.height/2;
                     }
                 }

                 if (server_socket.connected){
                     var s = "m " + ball.x + " " + ball.y;
                     server_socket.sendStringData(s);
                 }
             }
             onScore: {
                 scoreLeft.text = left;
                 scoreRight.text = right;

                 if (server_socket.connected) {
                     var s = "s " + left + " " + right;
                     server_socket.sendStringData(s);
                 }
             }
         }
     }
 }