很抱歉问了一个很长的问题，但请继续。我正在尝试在此处修改演示周围的拖动形状:

http://raphaeljs.com/graffle.html

该演示运行良好。我想要做的是将文字放入形状中，并将形状和文本作为一个复合单个对象四处移动。

下面是创建对象的代码:

window.onload = function () {
    var dragger = function () {
        this.ox = this.type == "rect" ? this.attr("x") : this.attr("cx");
        this.oy = this.type == "rect" ? this.attr("y") : this.attr("cy");
        this.animate({"fill-opacity": .2}, 500);
    },
        move = function (dx, dy) {
            var att = this.type == "rect" ? {x: this.ox + dx, y: this.oy + dy} : {cx: this.ox + dx, cy: this.oy + dy};
            this.attr(att);
            for (var i = connections.length; i--;) {
                r.connection(connections[i]);
            }
            r.safari();
        },
        up = function () {
            this.animate({"fill-opacity": 0}, 500);
        },
        r = Raphael("holder", 640, 480),
        connections = [],
        shapes = [  r.ellipse(190, 100, 30, 20),
                    r.rect(290, 80, 60, 40, 10),
                    r.rect(290, 180, 60, 40, 2),
                    r.ellipse(450, 100, 20, 20)
                ];
    for (var i = 0, ii = shapes.length; i < ii; i++) {
        var color = Raphael.getColor();
        shapes[i].attr({fill: color, stroke: color, "fill-opacity": 0, "stroke-width": 2, cursor: "move"});
        shapes[i].drag(move, dragger, up);
    }
    connections.push(r.connection(shapes[0], shapes[1], "#fff"));
    connections.push(r.connection(shapes[1], shapes[2], "#fff", "#fff|5"));
    connections.push(r.connection(shapes[1], shapes[3], "#000", "#fff"));
};

我试过这样的:

 myWords = [ r.text(190, 100,  "Hello"),
      r.text(480,100, "Good Bye")
    ];

并在其他地方进行了调整，以便它可以工作，但随后它只是移动文本和形状，但形状和文本永远不会被视为一个整体。我可以将文本与形状分开移动，反之亦然。我需要它们成为一个对象。所以他们一起移动。我怎样才能做到这一点？感谢您的帮助。

编辑:

我试过这个:

  st.push(r.text (190, 100, "node1"), r.ellipse(190, 100, 30, 20)),
  st.push(r.text (290, 80, "Center"), r.rect(290, 80, 60, 40, 10)),
  st.push(r.text (290, 180, "node2"), r.rect(290, 180, 60, 40, 2)),
  st.push(r.text (450, 100, "node3"), r.ellipse(450, 100, 20, 20))

但是当我移动形状时，文本和形状并没有保持在一起。文字保持静止。

编辑:我无法在 http://raphaeljs.com/graffle.html 获得股票演示与 Chrome 一起工作。 IE 可以正常工作。

最佳答案

是否进行了重大编辑以更优雅的方式关联元素。

Sets 适合对 Raphael 对象进行分组，但集合不会创建自己的元素，因此您不能拖放集合，因为当您在 Canvas 上单击时，您要么选择形状或文本，但永远不会选择集合(因为没有 set 元素)。

Here is a simple jsFiddle showing the properties of a set. 请注意，集合没有 x 或 y 属性。

来自 Raphael documentation :

[A set c]reates array-like object to keep and operate couple of elements at once. Warning: it doesn’t create any elements for itself in the page.

简单的解决方法是使文本和形状都可单独拖动。然后将关联的文本与形状一起移动...以及将关联的形状与文本一起移动。

像这样关联对象很简单……创建一个属性。在这种情况下，每个形状和每个文本都有一个名为 .pair 的属性，它是对关联元素的引用。

这是它是如何完成的:

var i, ii, tempS, tempT
     shapes = [  ... ],
     texts = [  ... ];
for (i = 0, ii = shapes.length; i < ii; i++) {
    tempS = shapes[i].attr( ... );
    tempT = texts[i].attr( ...);

      // Make all the shapes and texts dragable
    shapes[i].drag(move, dragger, up);
    texts[i].drag(move, dragger, up);

      // Associate the elements
    tempS.pair = tempT;
    tempT.pair = tempS;
}

然后在拖放代码中，即 move()、dragger() 和 up() 函数必须确保同时处理被点击的元素及其关联的元素。

例如，这里是 move() 函数的相关部分。请注意，text 可以用与 rectangle 相同的方式处理(通过更改属性 x 和 y)，所以下面每个 Javascript 条件运算符中的 false 条件都处理 rectangle 和 text

move = function (dx, dy) {

      // Move main element
    var att = this.type == "ellipse" ? 
                           {cx: this.ox + dx, cy: this.oy + dy} : 
                           {x: this.ox + dx, y: this.oy + dy};
    this.attr(att);

      // Move paired element
    att = this.pair.type == "ellipse" ? 
                            {cx: this.pair.ox + dx, cy: this.pair.oy + dy} : 
                            {x: this.pair.ox + dx, y: this.pair.oy + dy};
    this.pair.attr(att);
    ...
}

下面是完整的工作代码:

Working jsFiddle example of draggable text and shapes

Raphael.fn.connection = function (obj1, obj2, line, bg) {
    if (obj1.line && obj1.from && obj1.to) {
        line = obj1;
        obj1 = line.from;
        obj2 = line.to;
    }
    var bb1 = obj1.getBBox(),
        bb2 = obj2.getBBox(),
        p = [{x: bb1.x + bb1.width / 2, y: bb1.y - 1},
        {x: bb1.x + bb1.width / 2, y: bb1.y + bb1.height + 1},
        {x: bb1.x - 1, y: bb1.y + bb1.height / 2},
        {x: bb1.x + bb1.width + 1, y: bb1.y + bb1.height / 2},
        {x: bb2.x + bb2.width / 2, y: bb2.y - 1},
        {x: bb2.x + bb2.width / 2, y: bb2.y + bb2.height + 1},
        {x: bb2.x - 1, y: bb2.y + bb2.height / 2},
        {x: bb2.x + bb2.width + 1, y: bb2.y + bb2.height / 2}],
        d = {}, dis = [];
    for (var i = 0; i < 4; i++) {
        for (var j = 4; j < 8; j++) {
            var dx = Math.abs(p[i].x - p[j].x),
                dy = Math.abs(p[i].y - p[j].y);
            if ((i == j - 4) || (((i != 3 && j != 6) || p[i].x < p[j].x) && ((i != 2 && j != 7) || p[i].x > p[j].x) && ((i != 0 && j != 5) || p[i].y > p[j].y) && ((i != 1 && j != 4) || p[i].y < p[j].y))) {
                dis.push(dx + dy);
                d[dis[dis.length - 1]] = [i, j];
            }
        }
    }
    if (dis.length == 0) {
        var res = [0, 4];
    } else {
        res = d[Math.min.apply(Math, dis)];
    }
    var x1 = p[res[0]].x,
        y1 = p[res[0]].y,
        x4 = p[res[1]].x,
        y4 = p[res[1]].y;
    dx = Math.max(Math.abs(x1 - x4) / 2, 10);
    dy = Math.max(Math.abs(y1 - y4) / 2, 10);
    var x2 = [x1, x1, x1 - dx, x1 + dx][res[0]].toFixed(3),
        y2 = [y1 - dy, y1 + dy, y1, y1][res[0]].toFixed(3),
        x3 = [0, 0, 0, 0, x4, x4, x4 - dx, x4 + dx][res[1]].toFixed(3),
        y3 = [0, 0, 0, 0, y1 + dy, y1 - dy, y4, y4][res[1]].toFixed(3);
    var path = ["M", x1.toFixed(3), y1.toFixed(3), "C", x2, y2, x3, y3, x4.toFixed(3), y4.toFixed(3)].join(",");
    if (line && line.line) {
        line.bg && line.bg.attr({path: path});
        line.line.attr({path: path});
    } else {
        var color = typeof line == "string" ? line : "#000";
        return {
            bg: bg && bg.split && this.path(path).attr({stroke: bg.split("|")[0], fill: "none", "stroke-width": bg.split("|")[1] || 3}),
            line: this.path(path).attr({stroke: color, fill: "none"}),
            from: obj1,
            to: obj2
        };
    }
};

var el;
window.onload = function () {
    var color, i, ii, tempS, tempT,
        dragger = function () {
                // Original coords for main element
            this.ox = this.type == "ellipse" ? this.attr("cx") : this.attr("x");
            this.oy = this.type == "ellipse" ? this.attr("cy") : this.attr("y");
            if (this.type != "text") this.animate({"fill-opacity": .2}, 500);

                // Original coords for pair element
            this.pair.ox = this.pair.type == "ellipse" ? this.pair.attr("cx") : this.pair.attr("x");
            this.pair.oy = this.pair.type == "ellipse" ? this.pair.attr("cy") : this.pair.attr("y");
            if (this.pair.type != "text") this.pair.animate({"fill-opacity": .2}, 500);            
        },
        move = function (dx, dy) {
                // Move main element
            var att = this.type == "ellipse" ? {cx: this.ox + dx, cy: this.oy + dy} : 
                                               {x: this.ox + dx, y: this.oy + dy};
            this.attr(att);

                // Move paired element
            att = this.pair.type == "ellipse" ? {cx: this.pair.ox + dx, cy: this.pair.oy + dy} : 
                                               {x: this.pair.ox + dx, y: this.pair.oy + dy};
            this.pair.attr(att);            

                // Move connections
            for (i = connections.length; i--;) {
                r.connection(connections[i]);
            }
            r.safari();
        },
        up = function () {
                // Fade original element on mouse up
            if (this.type != "text") this.animate({"fill-opacity": 0}, 500);

                // Fade paired element on mouse up
            if (this.pair.type != "text") this.pair.animate({"fill-opacity": 0}, 500);            
        },
        r = Raphael("holder", 640, 480),
        connections = [],
        shapes = [  r.ellipse(190, 100, 30, 20),
                    r.rect(290, 80, 60, 40, 10),
                    r.rect(290, 180, 60, 40, 2),
                    r.ellipse(450, 100, 20, 20)
                ],
        texts = [   r.text(190, 100, "One"),
                    r.text(320, 100, "Two"),
                    r.text(320, 200, "Three"),
                    r.text(450, 100, "Four")
                ];
    for (i = 0, ii = shapes.length; i < ii; i++) {
        color = Raphael.getColor();
        tempS = shapes[i].attr({fill: color, stroke: color, "fill-opacity": 0, "stroke-width": 2, cursor: "move"});
        tempT = texts[i].attr({fill: color, stroke: "none", "font-size": 15, cursor: "move"});
        shapes[i].drag(move, dragger, up);
        texts[i].drag(move, dragger, up);

        // Associate the elements
        tempS.pair = tempT;
        tempT.pair = tempS;
    }
    connections.push(r.connection(shapes[0], shapes[1], "#fff"));
    connections.push(r.connection(shapes[1], shapes[2], "#fff", "#fff|5"));
    connections.push(r.connection(shapes[1], shapes[3], "#000", "#fff"));
};​

为了完整起见，这里是 the linked to jsFiddle for showing the properties of a set 的代码:

window.onload = function () {
    var paper = Raphael("canvas", 320, 200),
        st = paper.set(), 
        propArr = [];

    st.push(
        paper.circle(10, 10, 5),
        paper.circle(30, 10, 5)
    );

    st.attr({fill: "red"});

    for(var prop in st) {
        if (st.hasOwnProperty(prop)) {
            // handle prop as required
            propArr.push(prop + " : " + st[prop]);
        }
    }
    alert(propArr.join("\n"));
};​

// Output:
// 0 : Raphael's object
// 1 : Raphael's object
// items : Raphael's object,Raphael's object
// length : 2
// type : set

关于javascript - 如何组合 Raphael javascript 库中的对象？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3679436/