动态创建的元素不可拖动

Question

我有一个简单的块，它的元素动态添加到 DOM，我希望用户能够创建一个块，并且它应该可以使用 jsplumb 库进行拖动。

不幸的是，现在我可以创建元素但它们不可拖动，但如果我手动将它们添加到 dom，它是可拖动的。

这是我到目前为止所拥有的

function addMovieButton() {

    var newMovieBlockButton = $("<div class='movie-button w'>Button New<div class='ep' action='begin'></div><div>");

}

这是 plumb.js

jsPlumb.ready(function () {

    // setup some defaults for jsPlumb.
    var instance = jsPlumb.getInstance({
        Endpoint: ["Dot", {radius: 5}],
        Connector:"StateMachine",
        HoverPaintStyle: {stroke: "#1e8151", strokeWidth: 2 },
        ConnectionOverlays: [
            [ "Arrow", {
                location: 1,
                id: "arrow",
                length: 14,
                foldback: 0.8
            } ],
            [ "Label", { label: "FOO", id: "label", cssClass: "aLabel" }]
        ],
        Container: "canvas"
    });

    instance.registerConnectionType("basic", { anchor:"Continuous", connector:"StateMachine" });

    window.jsp = instance;

    var canvas = document.getElementById("canvas");
    var windows = jsPlumb.getSelector(".statemachine-demo .w");
    var windows_movie = jsPlumb.getSelector(".statemachine-demo .movie-block ");

    // bind a click listener to each connection; the connection is deleted. you could of course
    // just do this: jsPlumb.bind("click", jsPlumb.detach), but I wanted to make it clear what was
    // happening.
    instance.bind("click", function (c) {
        instance.deleteConnection(c);
    });

    // bind a connection listener. note that the parameter passed to this function contains more than
    // just the new connection - see the documentation for a full list of what is included in 'info'.
    // this listener sets the connection's internal
    // id as the label overlay's text.
    instance.bind("connection", function (info) {
        info.connection.getOverlay("label").setLabel(info.connection.id);
    });

    // bind a double click listener to "canvas"; add new node when this occurs.
    jsPlumb.on(canvas, "dblclick", function(e) {
      //  newNode(e.offsetX, e.offsetY);
    });

    //
    // initialise element as connection targets and source.
    //
    var initNode = function(el) {

        // initialise draggable elements.
        instance.draggable(el);

        instance.makeSource(el, {
            filter: ".ep",
            anchor: "Continuous",
            connectorStyle: { stroke: "#5c96bc", strokeWidth: 2, outlineStroke: "transparent", outlineWidth: 4 },
            connectionType:"basic",
            extract:{
                "action":"the-action"
            },
            maxConnections: 6,
            onMaxConnections: function (info, e) {
                alert("Maximum connections (" + info.maxConnections + ") reached");
            }
        });

        instance.makeTarget(el, {
            dropOptions: { hoverClass: "dragHover" },
            anchor: "Continuous",
            allowLoopback: true
        });

        // this is not part of the core demo functionality; it is a means for the Toolkit edition's wrapped
        // version of this demo to find out about new nodes being added.
        //
        instance.fire("jsPlumbDemoNodeAdded", el);
    };

    // suspend drawing and initialise.
    instance.batch(function () {
        for (var i = 0; i < windows.length; i++) {
            initNode(windows[i], true);
            console.log(windows[i]);
        }
        for (var j = 0; j < windows_movie.length; j++) {
            initNode(windows_movie[j], true);
            console.log(windows_movie[j]);
        }


    });

    jsPlumb.fire("jsPlumbDemoLoaded", instance);

});

这是现场演示现场演示

这是plunker的完整源代码

在上面的演示中，只需右键单击添加电影块进行测试

为什么可拖动不能用于动态创建的元素？

Answer 1

这是我不久前第一次发现“jsplumb”时制作的示例页面，它完全符合您的要求，因此您可能想要使用它或在它之上构建。
请记住，确实应该在将元素添加到 DOM 后调用draggable方法，我的示例非常简单：

• 它不需要jsplumb.fire
• 它不需要.ready绑定
• 它不需要 jsplumb 提供的“批处理”处理

这样您就可以避免诸如准备范围之类的问题以及我仍在努力掌握的其他问题。