/** Copyright (c) 2010 Dennis Hotson Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ (function() { jQuery.fn.springy = function(params) { var graph = this.graph = params.graph || new Graph(); var stiffness = params.stiffness || 400.0; var repulsion = params.repulsion || 400.0; var damping = params.damping || 0.5; var nodeSelected = params.nodeSelected || null; var canvas = this[0]; var ctx = canvas.getContext("2d"); var layout = this.layout = new Layout.ForceDirected(graph, stiffness, repulsion, damping); // calculate bounding box of graph layout.. with ease-in var currentBB = layout.getBoundingBox(); var targetBB = {bottomleft: new Vector(-2, -2), topright: new Vector(2, 2)}; // auto adjusting bounding box Layout.requestAnimationFrame(function adjust() { targetBB = layout.getBoundingBox(); // current gets 20% closer to target every iteration currentBB = { bottomleft: currentBB.bottomleft.add( targetBB.bottomleft.subtract(currentBB.bottomleft) .divide(10)), topright: currentBB.topright.add( targetBB.topright.subtract(currentBB.topright) .divide(10)) }; Layout.requestAnimationFrame(adjust); }); // convert to/from screen coordinates toScreen = function(p) { var size = currentBB.topright.subtract(currentBB.bottomleft); var sx = p.subtract(currentBB.bottomleft).divide(size.x).x * canvas.width; var sy = p.subtract(currentBB.bottomleft).divide(size.y).y * canvas.height; return new Vector(sx, sy); }; fromScreen = function(s) { var size = currentBB.topright.subtract(currentBB.bottomleft); var px = (s.x / canvas.width) * size.x + currentBB.bottomleft.x; var py = (s.y / canvas.height) * size.y + currentBB.bottomleft.y; return new Vector(px, py); }; // half-assed drag and drop var selected = null; var nearest = null; var dragged = null; jQuery(canvas).mousedown(function(e) { jQuery('.actions').hide(); var pos = jQuery(this).offset(); var p = fromScreen({x: e.pageX - pos.left, y: e.pageY - pos.top}); selected = nearest = dragged = layout.nearest(p); if (selected.node !== null) { dragged.point.m = 10000.0; if (nodeSelected) { nodeSelected(selected.node); } } renderer.start(); }); jQuery(canvas).mousemove(function(e) { var pos = jQuery(this).offset(); var p = fromScreen({x: e.pageX - pos.left, y: e.pageY - pos.top}); nearest = layout.nearest(p); if (dragged !== null && dragged.node !== null) { dragged.point.p.x = p.x; dragged.point.p.y = p.y; } renderer.start(); }); jQuery(window).bind('mouseup',function(e) { dragged = null; }); Node.prototype.getWidth = function() { var text = (this.data.label !== undefined) ? this.data.label : this.id; if (this._width && this._width[text]) return this._width[text]; ctx.save(); ctx.font = "16px Verdana, sans-serif"; var width = ctx.measureText(text).width + 10; ctx.restore(); this._width || (this._width = {}); this._width[text] = width; return width; }; Node.prototype.getHeight = function() { return 20; }; var renderer = new Renderer(layout, function clear() { ctx.clearRect(0,0,canvas.width,canvas.height); }, function drawEdge(edge, p1, p2) { var x1 = toScreen(p1).x; var y1 = toScreen(p1).y; var x2 = toScreen(p2).x; var y2 = toScreen(p2).y; var direction = new Vector(x2-x1, y2-y1); var normal = direction.normal().normalise(); var from = graph.getEdges(edge.source, edge.target); var to = graph.getEdges(edge.target, edge.source); var total = from.length + to.length; // Figure out edge's position in relation to other edges between the same nodes var n = 0; for (var i=0; i 1 || ub < 0 || ub > 1) { return false; } return new Vector(p1.x + ua * (p2.x - p1.x), p1.y + ua * (p2.y - p1.y)); } function intersect_line_box(p1, p2, p3, w, h) { var tl = {x: p3.x, y: p3.y}; var tr = {x: p3.x + w, y: p3.y}; var bl = {x: p3.x, y: p3.y + h}; var br = {x: p3.x + w, y: p3.y + h}; var result; if (result = intersect_line_line(p1, p2, tl, tr)) { return result; } // top if (result = intersect_line_line(p1, p2, tr, br)) { return result; } // right if (result = intersect_line_line(p1, p2, br, bl)) { return result; } // bottom if (result = intersect_line_line(p1, p2, bl, tl)) { return result; } // left return false; } return this; } })();