Question

我正在尝试读取Fabric.js上鼠标点击的X坐标。

这是我的代码。控制台每次都会记录undefined。

var canvas = new fabric.Canvas('c1');
canvas.on('mouse:down', function(e){
  getMouse(e);
});

function getMouse(e) {
  console.log(e.clientX);
}

Answer 1

最佳解决方法是this方法

实现：

function getMouseCoords(event)
{
  var pointer = canvas.getPointer(event.e);
  var posX = pointer.x;
  var posY = pointer.y;
  console.log(posX+", "+posY);    // Log to console
}

Answer 2

要根据画布本身的设置宽度和高度获取坐标，请使用layerX和layerY属性。

canvas.on('mouse:move', function(options) {
    console.log(options.e.layerX, options.e.layerY);
});

Answer 3

试试这个，

function getMouse(e) {
    console.log(e.e.clientX);
}

Demo

已更新，，因为canvas events将options视为argument而不是an event，

canvas.on('mouse:down', function(options){
   getMouse(options);// its not an event its options of your canvas object
});


function getMouse(options) {
    console.log(options);// you can check all options here
    console.log(options.e.clientX);
}

Answer 4

也许这会有所帮助：

//Convert To Local Point
function toLocalPoint(event, canvas) {
var offset = fabric.util.getElementOffset(canvas.lowerCanvasEl), localX = event.e.clientX - offset.left, localY = event.e.clientY - offset.top;
return new fabric.Point(localX, localY);

}

Answer 5

只需使用e.e.clientX

或

e.e.clientY

获取职位

如何在Fabric.js上获得鼠标坐标？

5 个答案: