如何在Raphael javascript库中组合对象？

Question

抱歉,这是一个很长的问题.我想在这里修改demo的拖动形状:

http://raphaeljs.com/graffle.html

该演示工作正常.我想要做的是将单词放在形状中,并将形状和文本作为复合单个对象移动.

以下是创建对象的代码:

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"));
};

我试过这样的事情:

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

并在其他地方进行调整,以便它可以工作,但它只是移动文本和形状,但形状和文字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.我需要他们成为一个对象.所以他们一起移动 我怎样才能做到这一点？感谢您的任何帮助.

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,文字和形状并没有保持在一起.文字保持不动.

编辑:我无法在http://raphaeljs.com/graffle.html上获得与Chrome合作的股票演示.IE它的工作原理.

Answer 1

主要编辑以更优雅的方式关联元素.

集合适用于分组Raphael对象,但集合不会创建自己的元素,因此您无法拖放集合,因为当您单击画布时,您可以选择形状或文本,但不要选择集合(因为有没有设定元素).

这是一个简单的jsFiddle,显示了一个集合的属性.请注意,集合没有x或y属性.

来自Raphael的文档:

[set c]创建类似于数组的对象,以便一次保持和操作几个元素.警告:它不会在页面中为自己创建任何元素.

简单的解决方法是使文本和形状分别可拖动.然后将关联的文本与形状...以及相关的形状以及文本一起移动.

关联这样的对象很简单......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属性,称为.pair对相关元素的引用.

以下是它的完成方式:

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,这是move(),dragger()和up()功能,您必须确保同时处理点击的元素及其相关元素.

例如,这是move()函数的相关部分.注意,text可以通过与rectangle(通过更改属性x和y)相同的方式处理,因此下面的false每个Javascript条件运算符中的条件都处理for rectangle和for 的情况.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);
    ...
}

以下是完整的工作代码:

使用jsFiddle可拖动文本和形状的示例

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"));
};?

为了完整性,这里是链接到jsFiddle的代码,用于显示集合的属性:

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

Answer 2

或者,试试Raphael的这个"组"插件,它可以让你创建一个合适的SVG组元素.

https://github.com/rhyolight/Raphael-Plugins/blob/master/raphael.group.js