mirror of
https://git.code.sf.net/p/seeddms/code
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107 lines
5.4 KiB
JavaScript
107 lines
5.4 KiB
JavaScript
/**
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* Originally grabbed from the official RaphaelJS Documentation
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* http://raphaeljs.com/graffle.html
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* Adopted (arrows) and commented by Philipp Strathausen http://blog.ameisenbar.de
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* Licenced under the MIT licence.
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*/
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/**
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* Usage:
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* connect two shapes
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* parameters:
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* source shape [or connection for redrawing],
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* target shape,
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* style with { fg : linecolor, bg : background color, directed: boolean }
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* returns:
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* connection { draw = function() }
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*/
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Raphael.fn.connection = function (obj1, obj2, style) {
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var selfRef = this;
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/* create and return new connection */
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var edge = {/*
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from : obj1,
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to : obj2,
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style : style,*/
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draw : function() {
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/* get bounding boxes of target and source */
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var bb1 = obj1.getBBox();
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var bb2 = obj2.getBBox();
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var off1 = 0;
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var off2 = 0;
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/* coordinates for potential connection coordinates from/to the objects */
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var p = [
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{x: bb1.x + bb1.width / 2, y: bb1.y - off1}, /* NORTH 1 */
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{x: bb1.x + bb1.width / 2, y: bb1.y + bb1.height + off1}, /* SOUTH 1 */
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{x: bb1.x - off1, y: bb1.y + bb1.height / 2}, /* WEST 1 */
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{x: bb1.x + bb1.width + off1, y: bb1.y + bb1.height / 2}, /* EAST 1 */
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{x: bb2.x + bb2.width / 2, y: bb2.y - off2}, /* NORTH 2 */
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{x: bb2.x + bb2.width / 2, y: bb2.y + bb2.height + off2}, /* SOUTH 2 */
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{x: bb2.x - off2, y: bb2.y + bb2.height / 2}, /* WEST 2 */
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{x: bb2.x + bb2.width + off2, y: bb2.y + bb2.height / 2} /* EAST 2 */
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];
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/* distances between objects and according coordinates connection */
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var d = {}, dis = [];
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/*
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* find out the best connection coordinates by trying all possible ways
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*/
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/* loop the first object's connection coordinates */
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for (var i = 0; i < 4; i++) {
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/* loop the seond object's connection coordinates */
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for (var j = 4; j < 8; j++) {
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var dx = Math.abs(p[i].x - p[j].x),
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dy = Math.abs(p[i].y - p[j].y);
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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))) {
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dis.push(dx + dy);
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d[dis[dis.length - 1].toFixed(3)] = [i, j];
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}
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}
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}
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var res = dis.length == 0 ? [0, 4] : d[Math.min.apply(Math, dis).toFixed(3)];
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/* bezier path */
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var x1 = p[res[0]].x,
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y1 = p[res[0]].y,
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x4 = p[res[1]].x,
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y4 = p[res[1]].y,
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dx = Math.max(Math.abs(x1 - x4) / 2, 10),
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dy = Math.max(Math.abs(y1 - y4) / 2, 10),
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x2 = [x1, x1, x1 - dx, x1 + dx][res[0]].toFixed(3),
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y2 = [y1 - dy, y1 + dy, y1, y1][res[0]].toFixed(3),
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x3 = [0, 0, 0, 0, x4, x4, x4 - dx, x4 + dx][res[1]].toFixed(3),
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y3 = [0, 0, 0, 0, y1 + dy, y1 - dy, y4, y4][res[1]].toFixed(3);
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/* assemble path and arrow */
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var path = ["M", x1.toFixed(3), y1.toFixed(3), "C", x2, y2, x3, y3, x4.toFixed(3), y4.toFixed(3)].join(",");
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/* arrow */
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if(style && style.directed) {
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/* magnitude, length of the last path vector */
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var mag = Math.sqrt((y4 - y3) * (y4 - y3) + (x4 - x3) * (x4 - x3));
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/* vector normalisation to specified length */
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var norm = function(x,l){return (-x*(l||5)/mag);};
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/* calculate array coordinates (two lines orthogonal to the path vector) */
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var arr = [
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{x:(norm(x4-x3)+norm(y4-y3)+x4).toFixed(3), y:(norm(y4-y3)+norm(x4-x3)+y4).toFixed(3)},
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{x:(norm(x4-x3)-norm(y4-y3)+x4).toFixed(3), y:(norm(y4-y3)-norm(x4-x3)+y4).toFixed(3)}
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];
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path = path + ",M"+arr[0].x+","+arr[0].y+",L"+x4+","+y4+",L"+arr[1].x+","+arr[1].y;
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}
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/* function to be used for moving existent path(s), e.g. animate() or attr() */
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var move = "attr";
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/* applying path(s) */
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edge.fg && edge.fg[move]({path:path})
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|| (edge.fg = selfRef.path(path).attr({stroke: style && style.stroke || "#000", fill: "none"}).toBack());
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edge.bg && edge.bg[move]({path:path})
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|| style && style.fill && (edge.bg = style.fill.split && selfRef.path(path).attr({stroke: style.fill.split("|")[0], fill: "none", "stroke-width": style.fill.split("|")[1] || 3}).toBack());
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/* setting label */
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style && style.label
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&& (edge.label && edge.label.attr({x:(x1+x4)/2, y:(y1+y4)/2})
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|| (edge.label = selfRef.text((x1+x4)/2, (y1+y4)/2, style.label).attr({fill: "#000", "font-size": style["font-size"] || "12px"})));
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style && style.label && style["label-style"] && edge.label && edge.label.attr(style["label-style"]);
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style && style.callback && style.callback(edge);
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}
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}
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edge.draw();
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return edge;
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};
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//Raphael.prototype.set.prototype.dodo=function(){console.log("works");};
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