Warning, /education/gcompris/external/qml-box2d/examples/pulley/main.qml is written in an unsupported language. File is not indexed.

 import QtQuick 2.2
 import Box2D 2.0
 import "../shared"
 
 Rectangle {
     id: screen
     width: 800
     height: 600
 
     Component {
         id: ballComponent
         PhysicsItem {
             id: box
             width: 20
             height: 20
             bodyType: Body.Dynamic
             fixtures: Circle {
                 radius: box.width / 2
                 density: 10
                 friction: 0.3
                 restitution: 0.5
             }
             Rectangle {
                 radius: parent.width / 2
                 border.color: "blue"
                 color: "#EFEFEF"
                 anchors.fill: parent
             }
         }
     }
 
     World { id: physicsWorld; }
 
     Canvas {
         id: cords
         anchors.fill: parent
         onPaint: {
             var bodyACenter = bodyA.body.getWorldCenter();
             var bodyBCenter = bodyB.body.getWorldCenter();
             var context = cords.getContext("2d");
             context.clearRect(0, 0, width, height);
             context.beginPath();
             context.moveTo(225,100);
             context.lineTo(575,100);
             context.moveTo(bodyACenter.x, bodyACenter.y);
             context.lineTo(225,100);
             context.moveTo(bodyBCenter.x, bodyBCenter.y);
             context.lineTo(575,100);
             context.strokeStyle = "grey";
             context.stroke();
         }
     }
 
     PhysicsItem {
         id: ground
         height: 40
         anchors {
             left: parent.left
             right: parent.right
             bottom: parent.bottom
         }
         fixtures: Box {
             width: ground.width
             height: ground.height
             friction: 1
         }
         Rectangle {
             anchors.fill: parent
             color: "#DEDEDE"
         }
     }
     Wall {
         id: topWall
         height: 40
         anchors {
             left: parent.left
             right: parent.right
             top: parent.top
         }
     }
 
     Wall {
         id: leftWall
         width: 40
         anchors {
             left: parent.left
             top: parent.top
             bottom: parent.bottom
             bottomMargin: 40
         }
     }
 
     Wall {
         id: rightWall
         width: 40
         anchors {
             right: parent.right
             top: parent.top
             bottom: parent.bottom
             bottomMargin: 40
         }
     }
 
     PhysicsItem {
         id: limiterA
         x: 210
         y: 85
         width:30
         height: 30
         fixtures: Circle { radius: 15 }
         Rectangle {
             anchors.fill: parent
             radius: 15
             color: "green"
         }
     }
 
     PhysicsItem {
         id: limiterB
         x: 560
         y: 85
         width: 30
         height: 30
         fixtures: Circle { radius: 15 }
         Rectangle {
             anchors.fill: parent
             radius: 15
             color: "green"
         }
     }
 
     PhysicsItem {
         id: bodyA
         x: 125
         y: 300
         width: 200
         height: 100
         bodyType: Body.Dynamic
         fixtures: [
             Box {
                 y: 40
                 width: bodyA.width
                 height: bodyA.height - 40
                 density: 10
             },
             Box {
                 x: 0
                 y: 0
                 width: 10
                 height: 40
                 density: 10
             },
             Box {
                 x:190
                 y: 0
                 width: 10
                 height: 40
                 density: 10
             }
         ]
         Rectangle {
             anchors.fill: parent
             anchors.topMargin: 40
             color:"#555555"
         }
         Rectangle {
             x: 0
             y: 0
             width: 10
             height: 40
             color: "#555555"
         }
         Rectangle {
             x: 190
             y: 0
             width: 10
             height: 40
             color: "#555555"
         }
         onXChanged: cords.requestPaint();
         onYChanged: cords.requestPaint();
     }
     PhysicsItem {
         id: bodyB
         x: 475
         y: 300
         width: 200
         height: 100
         bodyType: Body.Dynamic
         fixtures: [
             Box {
                 y: 40
                 width: bodyB.width
                 height: bodyB.height - 40
                 density: 10
             },
             Box {
                 x: 0
                 y: 0
                 width: 10
                 height: 40
                 density: 10
             },
             Box {
                 x: 190
                 y: 0
                 width: 10
                 height: 40
                 density: 10
             }
         ]
         Rectangle {
             anchors.fill: parent
             anchors.topMargin: 40
             color: "#555555"
         }
         Rectangle {
             x: 0
             y: 0
             width: 10
             height: 40
             color: "#555555"
         }
         Rectangle {
             x: 190
             y: 0
             width: 10
             height: 40
             color:"#555555"
         }
     }
     PulleyJoint {
         bodyA: bodyA.body
         bodyB: bodyB.body
         groundAnchorA: Qt.point(225,100)
         groundAnchorB: Qt.point(575,100)
         localAnchorA: Qt.point(100,0)
         localAnchorB: Qt.point(100,0)
         lengthA: 150
         lengthB: 150
     }
 
     PhysicsItem {
         id: floor
         x: 40
         y: 260
         width: 720
         height: 120
         fixtures: [
             Box {
                 x: 0
                 y: 0
                 width: 84
                 height: floor.height
                 friction: 0.2
             },
             Box {
                 x: 286
                 y: 0
                 width: 148
                 height: floor.height
                 friction: 0.2
             },
             Box {
                 x: 636
                 y: 0
                 width: 84
                 height: floor.height
                 friction: 0.2
             }
         ]
         Rectangle {
             x: 0
             y: 0
             width: 84
             height: parent.height
             color: "#DEDEDE"
         }
         Rectangle {
             x: 286
             y: 0
             width: 148
             height: parent.height
             color: "#DEDEDE"
         }
         Rectangle {
             x: 636
             y: 0
             width: 84
             height: parent.height
             color: "#DEDEDE"
         }
 
     }
 
     PhysicsItem {
         id: triangle
         x: 370
         y: 500
         width: 60
         height: 60
         fixtures: Polygon {
             vertices: [
                 Qt.point(30,0),
                 Qt.point(0,60),
                 Qt.point(60,60)
             ]
         }
         Canvas {
             id: canvas
             anchors.fill: parent
             onPaint: {
                 var context = canvas.getContext("2d");
                 context.beginPath();
                 context.moveTo(parent.width / 2,0);
                 context.lineTo(0,parent.height);
                 context.lineTo(parent.width,parent.height);
                 context.lineTo(parent.width / 2,0);
                 context.fillStyle = "green";
                 context.fill();
             }
         }
     }
     PhysicsItem {
         id: balancer
         x: 70
         y: 490
         width: 660
         height: 10
         bodyType: Body.Dynamic
         fixtures: Box {
             width: balancer.width
             height: balancer.height
             density: 10
             friction: 0.5
         }
         Rectangle {
             anchors.fill: parent
             color: "orange"
         }
     }
 
     PhysicsItem {
         id: circle
         x: 370
         y: 430
         width: 60
         height: 60
         bodyType: Body.Dynamic
         fixtures: Circle {
             radius: 30
             density: 20
             friction: 0.9
         }
         Rectangle {
             anchors.fill: parent
             radius: 30
             color:  "red"
         }
     }
 
     Rectangle {
         id: debugButton
         x: 50
         y: 50
         width: 120
         height: 30
         Text {
             text: debugDraw.visible ? "Debug view: on" : "Debug view: off";
             anchors.centerIn: parent
         }
         color: "#DEDEDE"
         border.color: "#999"
         radius: 5
         MouseArea {
             anchors.fill: parent
             onClicked: debugDraw.visible = !debugDraw.visible;
         }
     }
 
     DebugDraw {
         id: debugDraw
         world: physicsWorld
         opacity: 1
         visible: false
     }
 
     Timer {
         id: ballsTimer
         interval: 1000
         running: true
         repeat: true
         onTriggered: {
             var newBox = ballComponent.createObject(screen);
             newBox.x = 40 + Math.random() * screen.width - 80;
             newBox.y = 50;
             console.log(newBox.x, newBox.y)
         }
     }
 }