Game Programming Using Qt

Time for action – another approach to character navigation

Replace the previous key handlers with the following code:

QtObject { id: flags readonly property int speed: 20 property int horizontal: 0 } Keys.onRightPressed: { recalculateDurations(); flags.horizontal = 1 } Keys.onLeftPressed: { if(flags.horizontal != 0) return recalculateDurations() flags.horizontal = -1 } Keys.onUpPressed: jump() Keys.onReleased: { if(event.key == Qt.Key_Right) flags.horizontal = 0 if(event.key == Qt.Key_Left && flags.horizontal < 0) flags.horizontal = 0 } function recalculateDurations() { xAnimRight.duration = (xAnimRight.to-x)*1000/flags.speed xAnimLeft.duration = (x-xAnimLeft.to)*1000/flags.speed } NumberAnimation on x { id: xAnimRight running: flags.horizontal ...