如何在Raphael javascript库中组合对象？ [英] How can I combine objects in the Raphael javascript library?
问题描述
很抱歉这是一个很长的问题。我试图修改演示中的拖动形状：
Sorry for a long question but here goes. I am trying to modify the drag shapes around demo here:
http://raphaeljs.com/graffle.html
该演示正常。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。
The demo works fine. What I want to do is put words inside the shapes and move the shape and text around as a composite single object.
以下是创建对象的代码：
Here is the code for creating the objects:
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"));
};
我尝试过这样的事情：
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，但它只是移动文字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？感谢您的帮助。
and made adjustments elsewhere so that it would work, but then it just moves text and shapes but the shape and text are never seen as a whole. I can move the text separate from the shape and vice versa. I need them to be one object. so they move together. How can I do that? Thank you for any help.
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。文本保持不动。
But the text and shape did not stay together when I moved the shape. The text just stayed still.
编辑：我无法在 http://raphaeljs.com/graffle.html 与Chrome合作。 IE它的工作原理。
I cannot get the stock demo at http://raphaeljs.com/graffle.html to work with Chrome. IE it works.
推荐答案
主要编辑以更优雅的方式关联元素。
设置 适合分组Raphael对象，但是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，但绝不会设置（因为没有设置元素）。
Sets are good for grouping Raphael objects, but sets do not create their own elements, so you cannot drag and drop a set, since when you click on the canvas you either select the shape or the text, but never the set (since there is no set element).
这是一个简单的jsFiddle显示集合的属性。 请注意，集合没有 x 或 y 属性。
来自 Raphael文档 ：
From the Raphael documentation:
[set c]创建类似数组的对象，以保持并同时操作几个元素。 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...及相关的形状以及文本一起移动。
The simple work around is to make both the text and shape separately draggable. Then move the associated text along with the shape... and the associated shape along with the text.
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名为 .pair 的属性，它是对相关元素的引用。
Associating objects like this is simple... create a property. In this case each shape and each text has a property called .pair which is a reference to the associated element.
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;
}
然后在拖放代码中，这是 move（）， dragger（）， up（）你有的功能确保处理clicked元素及其相关元素。
And then in the drag and drop code, which is the move(), dragger(), and up() functions you have to make sure to deal with both the clicked on element and its associated element.
例如，这里是 move（）<的相关部分/ code>功能。请注意， text 的处理方式与 rectangle 相同（通过更改属性 x 和 y ），所以下面的每个Javascript条件运算符中的 false 条件句柄矩形的情况和的文字
For example here is the pertinent part of the move() function. Note that text can be dealt with in the same way as rectangle (by changing attributes x and y), so the false condition in each of the Javascript conditional operators below handles both the case for rectangle and for 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：
And below is the full working code:
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"));
};
此处为完整性是 链接到jsFiddle以显示集合的属性的代码：
For completeness here is the code for the linked to jsFiddle for showing the properties of a set:
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
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