javascript - 从“dragmove”回调中移动层后事件丢失

Question

我有一个移动图层的滚动条，因此在滚动条的“dragmove”回调中移动了图层。这会导致移动层上的所有绑定事件断开连接！

请看这个小提琴：http: //jsfiddle.net/NY4QK/10/

var stage = new Kinetic.Stage({
    container: 'container',
    width: 200,
    height: 200,
});

var fixedLayer = new Kinetic.Layer();
stage.add(fixedLayer);

var old_x = 100;
var old_y = 100;

var scroller = new Kinetic.Circle({
    x: old_x,
    y: old_y,
    radius: 10,
    fill: '#00F',
    stroke: 'black',
    strokeWidth: 4,
    draggable: true
});

scroller.on('dragmove', function(event){
    var pos = scroller.getAbsolutePosition();
    layer.move(pos.x - old_x, pos.y - old_y);
    old_x = pos.x;
    old_y = pos.y;
    layer.draw();
});

fixedLayer.add(scroller);

var layer = new Kinetic.Layer();
stage.add(layer);

var rect = new Kinetic.Rect({
    x: 10,
    y: 10,
    width: 50,
    height: 50,
    fill: '#0F0',
    stroke: 'black',
    strokeWidth: 4
});


rect.on('click', function(){
    rect.remove();
    layer.draw();
});

layer.add(rect);

layer.draw();
fixedLayer.draw();

这是一个错误还是我做错了什么？

Answer 1

When you use a drag event, KineticJS create a temporary layer on top as a result of which your events where not getting registered after the dragmove.

Just add another handler for dragend like this:

scroller.on('dragend', function(event){
    layer.moveToTop();
    layer.draw();
});

And here is the updated fiddle.

For more details/explanation on the problem you faced, check this: https://github.com/ericdrowell/KineticJS/issues/219