KineticJS从一个图层拖放到另一个图层

Question

现在，我有一个舞台，两个图层和图像绘制在leftLayer。我通过添加属性draggable: true使图像可拖动。我找到的所有拖放示例(动能文档，教程，jsfiddles…)都在同一区域。

我怎样才能使项目谁是画在左边的层被丢弃只有在右层，否则，使他们恢复像在jquery(如果它是可实现的)?

这是我正在编辑的文件。的帮助!

Answer 1

你需要做的就是克隆对象，触发dragstart事件，然后在拖拽结束时检查项目是否被放置在正确的容器中，否则，将其动画回到原始容器。

示例:http://cs.neiu.edu/~tsam/physics/index.phtml(您可以使用user: test, pass: test登录)

示例代码:

itemBeingCloned。On ('mousedown touchstart'， function(){var userPos = stage. getpointposition ();

    var cloneOfItem= new Kinetic.Image({
        image: imageObj, // image of object being cloned
        x: userPos.x,
        y: userPos.y,
        height: 25, // or set the height
        width: 25, // or set the width
        draggable: true,
        offset: 12,
        dragOnTop: false // you might actually allow this to be true
    });
    yourTemporaryLayer.add(cloneOfItem); // well, you need to store this in a layer temporarily, you should have a layer which takes up the whole stage, and two child layers under it, left and right 
    /* Lets define the behavior (events) of the item you want to copy */
    cloneOfItem.on('dragmove', function(){ 
        // in case you need to do something while moving the item
    });
    cloneOfItem.on('dragend', function(){ // once you are done dragging, check if placing somewhere, most of the logic will go here
        // check if on right side, 
            //if so, add to right layer, else
            //else animate back to original position, then destroy
    });
    cloneOfItem.on('dblclick dbltap', function(evt){ // in case you want to remove the item, I defined it as double-click event destroying the item
        this.remove(); // remove from layer
        this.destroy(); // destroy object
    });
    /* so when you do mousedown on the original item, it will create the item, and fire the previously defined events (above) */
    cloneOfItem.fire('mousedown');
    cloneOfItem.fire('touchstart');
    cloneOfItem.fire('dragstart');
    yourRightLayer.draw(); //redraw the layer just in case? maybe not needed
});

Update (simple)

示例代码:

itemBeingCloned.on('mousedown touchstart', function(){
    var userPos = stage.getPointerPosition();
    var cloneOfItem= itemBeingCloned.clone();
    yourTemporaryLayer.add(cloneOfItem); // well, you need to store this in a layer temporarily, you should have a layer which takes up the whole stage, and two child layers under it, left and right 
    cloneOfItem.on('dragend', function(){ // once you are done dragging, check if placing somewhere, most of the logic will go here
        // check if on right side, 
            //if so, add to right layer, else
            //else animate back to original position, then destroy
    });
    /* so when you do mousedown on the original item, it will create the item, and fire the previously defined events (above) */
    cloneOfItem.fire('mousedown');
    cloneOfItem.fire('touchstart');
    cloneOfItem.fire('dragstart');
    yourRightLayer.draw(); //redraw the layer just in case? maybe not needed
});

更新:这是一个非常粗略的实现http://jsfiddle.net/GLFxF/16/