Game Programming Using Qt

Time for action – character navigation

Create a new QML document and call it Player.qml. In the document, place the following declarations:

Item {
  id: player
  y: parent.height
  focus: true
  
  Keys.onRightPressed: x = Math.min(x+20, parent.width)
  Keys.onLeftPressed: x = Math.max(0, x-20)
  Keys.onUpPressed: jump()

  function jump() { jumpAnim.start() }

  Image {
    source: "elephant.png"
    anchors.bottom: parent.bottom
    anchors.horizontalCenter: parent.horizontalCenter
  }
  Behavior on x { NumberAnimation { duration: 100 } }
  SequentialAnimation on y {
    id: jumpAnim
    running: false
    NumberAnimation { to: player.parent.height-50; easing.type: Easing.OutQuad }
    NumberAnimation { to: player.parent.height; easing.type: Easing.InQuad }
  }
}

Next, open the document containing the ...