snap svg 拖动一组套

Snap svg drag a set of sets

我希望能够使用 Snap SVG 将一组集合作为一个组拖动。到目前为止,我只能将子集(矩形和文本框)作为一个项目拖动,但我想要实现的是集体 'table' 是可拖动的,而其中的字段仍然是单独的形状,以便我可以保持它们之间的 link 正常工作。这可能吗? (编辑 - 我将 Raphael 重构为 Snap,并尝试将集合放入一个组中进行拖动)

这里有一个 link 给 plunker:http://plnkr.co/edit/9ewo0OcgThwB4KyMTxIL?p=preview

还有下面的代码:

    // Code goes here

Snap.plugin(  function( Snap, Element, Paper, global ) {

Paper.prototype.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 = "#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;
(function () {
    var color, i, ii, tempS, tempT;
    var dragger = function () {
        this.data("ox", this.attr("x"));
        this.data("oy", this.attr("y"));
        if (this.type != "text") this.animate({"fill-opacity": .2}, 500);

        //this.pair.ox = this.pair.attr("x");
        this.pair.data("ox", this.pair.attr("x"));
        //this.pair.oy = this.pair.attr("y");
        this.pair.data("oy", this.pair.attr("y"));
        if (this.pair.type != "text") this.pair.animate({"fill-opacity": .2}, 500);
    },
        move = function (dx, dy) {
            var att = {x: parseInt(this.data("ox")) + dx, y: parseInt( this.data("oy")) + dy};
            this.attr(att);
            //att = {x: this.pair.ox + dx, y: this.pair.oy + dy};
            att = {x: this.pair.data("oy") + dx, y: this.pair.data("oy") + dy};
            this.pair.attr(att);
            for (var i = connections.length; i--;) {
                s.connection(connections[i]);
            }
        },
        up = function () {
          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);
        },
        s = Snap("#svgout"),
        connections = [],
        shapes = [  // Users
                    s.rect(250, 80, 80, 20),
                    s.rect(250, 100, 80, 20),
                    s.rect(250, 120, 80, 20),
                    // Groups
                    s.rect(380, 80, 80, 20),
                    s.rect(380, 100, 80, 20),
                    s.rect(380, 120, 80, 20)
                ],
        texts = [   
                    s.text(290, 90, "Users"), //0
                    s.text(290, 110, "id"), //1
                    s.text(290, 130, "name"), //2
                    s.text(420, 90, "Groups"), //3
                    s.text(420, 110, "id"), //4
                    s.text(420, 130, "owner") //5
                ];
    for (var i = 0, ii = shapes.length; i < ii; i++) {
        color = "grey";
        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(s.connection(shapes[1], shapes[5]));
    var group1 = s.g(shapes[0], shapes[1], shapes[2], texts[0], texts[1], texts[2]);
    group1.drag(move, dragger, up);

})();

使用 Snap 会更容易一些,因为您根本不需要担心布景。 graffle/conversion 代码工作正常,但它只适用于矩形和圆形,所以它实际上看起来有点复杂,但我们可以让它在通过变换拖动的任何形状上工作。

不过要做到这一点,我们需要创建一个插件来获取一个边界框来解释它的变换,我认为 Snap 目前没有这样做(尽管有方法 getBBox(1) 我不知道认为这和我想的一样有效)

所以一个插件最初得到一个转换后的bbox(可能有更有效的方法,但只是做一个快速的解决方案)...

Element.prototype.getTransformedBB = function() {
    var bb = this.getBBox(1);
    var t = this.node.getTransformToElement( this.paper.node );
    var m = Snap.matrix( t );
    var obj = { x: m.x( bb.x, bb.y ), y: m.y( bb.x, bb.y ), x2: m.x( bb.x2, bb.y2 ), y2: m.y( bb.x2, bb.y2 ),
             cx: m.x( bb.cx, bb.cy ), cy: m.y( bb.cy, bb.cy ) }
    obj['width'] =  obj.x2 - obj.x
    obj['height'] = obj.y2 - obj.y
    return obj;
};

然后在连接代码中使用 getTransformedBB 而不是 getBBox()...

var bb1 = obj1.getTransformedBB(),
    bb2 = obj2.getTransformedBB(),

现在您正在使用 Snap,您可以使用适用于所有形状的简单拖动处理程序...

 var dragger = function () {

    this.data('origTransform', this.transform().local )
    this.animate({"fill-opacity": .5}, 500);
},
 move = function (dx, dy) {
        this.attr({ transform: this.data('origTransform') + (this.data('origTransform') ? "T" : "t") + [dx, dy]})
        for (var i = connections.length; i--;) {
            s.connection(connections[i]);
        }
 },
 up = function () {
      this.animate({"fill-opacity": 1}, 500);
 },

如果你只使用 rects,你可能不需要 transformedBB 的东西,但我认为这个解决方案可能适用于更奇怪的组情况。

plunker

来自组顶部的连接有点奇怪,不确定这是原始代码的错误还是什么,但如果需要,您可以通过在矩形上填充白色来绕过它并确保在连接后添加。