javascript - FabricJs Canvas 'Mouse:over' 事件不工作

Question

我正在尝试在 FabricJS(version:1.4.0) Canvas 上监听 mouse:over 事件，但它似乎没有像我预期的那样工作。这是片段

const canvas = new fabric.Canvas('gameCanvas', {selection: false});

const rect = new fabric.Rect({
    left: 120,
    top: 30,
    width: 100,
    height: 100,
    fill: 'green',
    angle: 20,
    name: 'Rectangle',
    hoverCursor: 'pointer'
});

canvas.add(rect);
canvas.renderAll();

$('.upper-canvas').mouseover(function (e)
{
     
     if(e.target !== null)
     {
        if(e.target.name === 'Rectangle')
       {
          e.target.set('fill', 'red');
          canvas.renderAll();
          console.log('mouse:over', e.target.name);
       }
     } 

});

$('.upper-canvas').mouseout(function (e)
{
    if(e.target !== null){
      e.target.set('fill', 'green');
      canvas.renderAll();
      console.log('mouse:out', e.target.name);
    }
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/fabric.js/1.4.0/fabric.min.js"></script>
<canvas id="gameCanvas" width="500" height="300" style="border: 2px solid green;"></canvas>

也添加了 mouse:out 事件和 canvas.renderAll() 函数来重新绘制 Canvas 。

Answer 1

来自 1.5.0 changelog :

Add "mouse:over" and "mouse:out" canvas events (and corresponding "mouseover", "mouseout" object events).

在 1.5.0 之前几乎没有此类事件。