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fixed minor issues

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Martin Thoma 2013-07-01 19:37:29 +02:00
parent 4f8837d107
commit 753becae8b
10 changed files with 524 additions and 18 deletions
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presentations/Diskrete-Mathematik/isomorph-graph-example/graph1-js/graffle.js Normal file
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/**
* Originally grabbed from the official RaphaelJS Documentation
* http://raphaeljs.com/graffle.html
* Changes and comments by Philipp Strathausen http://blog.ameisenbar.de
* Licenced under the MIT licence.
*/
/**
* Usage:
* connect two shapes
* parameters:
* source shape [or connection for redrawing],
* target shape,
* style with { fg : linecolor, bg : background color, directed: boolean }
* returns:
* connection { draw = function() }
*/
Raphael.fn.connection = function (obj1, obj2, style) {
var selfRef = this;
/* create and return new connection */
var color = style.fg || "#000";
var edge = {/*
from : obj1,
to : obj2,
style : style,*/
draw : function() {
/* get bounding boxes of target and source */
var bb1 = obj1.getBBox();
var bb2 = obj2.getBBox();
bb1.height = bb1.height + 15; /* respect the label TODO do it in a cleaner way */
bb2.height = bb2.height + 15;
var off1 = 1;
var off2 = 2;
/* coordinates for potential connection coordinates from/to the objects */
var p = [
{x: bb1.x + bb1.width / 2, y: bb1.y - off1}, /* NORTH 1 */
{x: bb1.x + bb1.width / 2, y: bb1.y + bb1.height + off1}, /* SOUTH 1 */
{x: bb1.x - off1, y: bb1.y + bb1.height / 2}, /* WEST 1 */
{x: bb1.x + bb1.width + off1, y: bb1.y + bb1.height / 2}, /* EAST 1 */
{x: bb2.x + bb2.width / 2, y: bb2.y - off2}, /* NORTH 2 */
{x: bb2.x + bb2.width / 2, y: bb2.y + bb2.height + off2}, /* SOUTH 2 */
{x: bb2.x - off2, y: bb2.y + bb2.height / 2}, /* WEST 2 */
{x: bb2.x + bb2.width + off2, y: bb2.y + bb2.height / 2} /* EAST 2 */
];
/* distances between objects and according coordinates connection */
var d = {}, dis = [];
/*
* find out the best connection coordinates by trying all possible ways
*/
/* loop the first object's connection coordinates */
for (var i = 0; i < 4; i++) {
/* loop the seond object's connection coordinates */
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];
}
}
}
var res = dis.length == 0 ? res = [0, 4] : d[Math.min.apply(Math, dis)];
/* bezier path */
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),
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);
/* assemble path and arrow */
var path = ["M", x1.toFixed(3), y1.toFixed(3), "C", x2, y2, x3, y3, x4.toFixed(3), y4.toFixed(3)].join(",");
/* arrow */
if(style && style.directed) {
/* magnitude, length of the last path vector */
var mag = Math.sqrt((y4 - y3) * (y4 - y3) + (x4 - x3) * (x4 - x3));
/* vector normalisation to specified length */
var norm = function(x,l){return (-x*(l||5)/mag);};
/* calculate array coordinates (two lines orthogonal to the path vector) */
var arr = [
{x:(norm(x4-x3)+norm(y4-y3)+x4).toFixed(3), y:(norm(y4-y3)+norm(x4-x3)+y4).toFixed(3)},
{x:(norm(x4-x3)-norm(y4-y3)+x4).toFixed(3), y:(norm(y4-y3)-norm(x4-x3)+y4).toFixed(3)}
];
path = path + ",M"+arr[0].x+","+arr[0].y+",L"+x4+","+y4+",L"+arr[1].x+","+arr[1].y;
}
// applying path
edge.fg && edge.fg.attr({path:path})
|| (edge.fg = selfRef.path(path).attr({stroke: color, fill: "none"}).toBack());
edge.bg && edge.bg.attr({path:path})
|| style && style.bg && (edge.bg = style.bg.split && selfRef.path(path).attr({stroke: style.bg.split("|")[0], fill: "none", "stroke-width": style.bg.split("|")[1] || 3}).toBack());
}
}
edge.draw();
return edge;
};