import Qt 4.7 import Qt.multimedia 4.7 Rectangle { id: page width: 640; height: 480 color: "Black" // Make a ball to bounce Rectangle { id: ball // Add a property for the target y coordinate property int targetY : page.height - 10 property variant direction : "right" x: 20; width: 20; height: 20; z: 1 color: "Lime" SoundEffect { id: paddle; source: "paddle.wav" } SoundEffect { id: wall; source: "click.wav" } // Move the ball to the right and back to the left repeatedly SequentialAnimation on x { loops: Animation.Infinite NumberAnimation { to: page.width - 40; duration: 2000 } ScriptAction { script: paddle.play() } PropertyAction { target: ball; property: "direction"; value: "left" } NumberAnimation { to: 20; duration: 2000 } ScriptAction { script: paddle.play() } PropertyAction { target: ball; property: "direction"; value: "right" } } // Make y follow the target y coordinate, with a velocity of 200 SpringFollow on y { to: ball.targetY; velocity: 200 } // Detect the ball hitting the top or bottom of the view and bounce it onYChanged: { if (y <= 0) { wall.play(); targetY = page.height - 20; } else if (y >= page.height - 20) { wall.play(); targetY = 0; } } } // Place bats to the left and right of the view, following the y // coordinates of the ball. Rectangle { id: leftBat color: "Lime" x: 2; width: 20; height: 90 SpringFollow on y { to: ball.y - 45; velocity: 300 enabled: ball.direction == 'left' } } Rectangle { id: rightBat color: "Lime" x: page.width - 22; width: 20; height: 90 SpringFollow on y { to: ball.y-45; velocity: 300 enabled: ball.direction == 'right' } } // The rest, to make it look realistic, if neither ever scores... Rectangle { color: "Lime"; x: page.width/2-80; y: 0; width: 40; height: 60 } Rectangle { color: "Black"; x: page.width/2-70; y: 10; width: 20; height: 40 } Rectangle { color: "Lime"; x: page.width/2+40; y: 0; width: 40; height: 60 } Rectangle { color: "Black"; x: page.width/2+50; y: 10; width: 20; height: 40 } Repeater { model: page.height / 20 Rectangle { color: "Lime"; x: page.width/2-5; y: index * 20; width: 10; height: 10 } } }