如何同時處理兩個關鍵事件

Question

我試圖創建兩個玩家之間的遊戲模擬。我想讓它們通過鍵盤移動，通過根矩形的Keys.onPressed屬性，但我遇到了一個問題，即兩個玩家不能同時獲得訂單，因爲只有一個關鍵事件被捕獲。是代碼：

Rectangle 
{ 
    id: root 
    height: 1000; width: 1000 

    Row 
    { 
     spacing: 100 
     x: 350 
     Repeater 
     { 
      id: repeater 
      model: 2 
      Rectangle 
      { 
       width: 50 
       height: 100 
       y:500 
       color: "blue" 
       property int speedForward: 5 
       property int speedBackward: 3 

       Rectangle 
       { 
        height: 10; width: 10 
        x: 20 
        color: "red" 
       } 
      } 
     } 
    } 

    Keys.onPressed: 
    { 
     var robot = (event.key > 100) ? repeater.itemAt(0) : repeater.itemAt(1) 

     if((event.key === 16777234) || (event.key === 65)) 
     { 
      robot.rotation = (robot.rotation - 5) % 360; 
     } 
     if((event.key === 16777236) || (event.key === 68)) 
     { 
      robot.rotation = (robot.rotation + 5) % 360; 
     } 
     if((event.key === 16777235) || (event.key === 87)) 
     { 
      robot.x = robot.x + robot.speedForward * Math.sin(Math.PI * robot.rotation/180); 
      robot.y = robot.y - robot.speedForward * Math.cos(Math.PI * robot.rotation/180); 
     } 
     if((event.key === 16777237) || (event.key === 83)) 
     { 
      robot.x = robot.x - robot.speedForward * Math.sin(Math.PI * robot.rotation/180); 
      robot.y = robot.y + robot.speedForward * Math.cos(Math.PI * robot.rotation/180); 
     } 
    } 

    focus: true 
} 

有什麼想法嗎？

Answer 1

您應該使用定時器和Keys.onReleased

這裏是你可以適應您的需求的例子：

property var robot1Event: {"rotation":false, 
          "move":false}; 
property var robot2Event: {"rotation":false, 
          "move":false}; 

Keys.onPressed: { 
    if (event.key === Qt.Key_Left) { robot1Event["rotation"] = true; } 
    if (event.key === Qt.Key_Up) { robot1Event["move"]  = true; } 
    if (event.key === Qt.Key_A) { robot2Event["rotation"] = true; } 
    if (event.key === Qt.Key_W) { robot2Event["move"]  = true; } 
} 
Keys.onReleased: { 
    if (event.key === Qt.Key_Left) { robot1Event["rotation"] = false; } 
    if (event.key === Qt.Key_Up) { robot1Event["move"]  = false; } 
    if (event.key === Qt.Key_A) { robot2Event["rotation"] = false; } 
    if (event.key === Qt.Key_W) { robot2Event["move"]  = false; } 
} 

Timer { 
    interval: 50; 
    running: true; 
    repeat: true; 
    onTriggered: { 
     var rotation = function (robot) { robot.rotation = (robot.rotation - 5) % 360; } 
     var move = function (robot) { 
      robot.x = robot.x + robot.speedForward * Math.sin(Math.PI * robot.rotation/180); 
      robot.y = robot.y - robot.speedForward * Math.cos(Math.PI * robot.rotation/180); 
     } 

     var robot = repeater.itemAt(0); 
     if (robot1Event["rotation"]) { rotation(robot); } 
     if (robot1Event["move"]) { move(robot); } 

     robot = repeater.itemAt(1); 
     if (robot2Event["rotation"]) { rotation(robot); } 
     if (robot2Event["move"]) { move(robot); } 
    } 
}