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// branch_renderer.js - Rendering of branch DAGs on the client side
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//
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// Copyright 2010 Marcin Kuzminski <marcin AT python-works DOT com>
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// Copyright 2008 Jesper Noehr <jesper AT noehr DOT org>
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// Copyright 2008 Dirkjan Ochtman <dirkjan AT ochtman DOT nl>
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// Copyright 2006 Alexander Schremmer <alex AT alexanderweb DOT de>
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//
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// derived from code written by Scott James Remnant <scott@ubuntu.com>
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// Copyright 2005 Canonical Ltd.
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//
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// This software may be used and distributed according to the terms
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// of the GNU General Public License, incorporated herein by reference.
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var colors = [
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[ 1.0, 0.0, 0.0 ],
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[ 1.0, 1.0, 0.0 ],
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[ 0.0, 1.0, 0.0 ],
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[ 0.0, 1.0, 1.0 ],
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[ 0.0, 0.0, 1.0 ],
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[ 1.0, 0.0, 1.0 ],
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[ 1.0, 1.0, 0.0 ],
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[ 0.0, 0.0, 0.0 ]
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];
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function BranchRenderer() {
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this.canvas = document.getElementById("graph_canvas");
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if (!document.createElement("canvas").getContext)
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this.canvas = window.G_vmlCanvasManager.initElement(this.canvas);
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this.ctx = this.canvas.getContext('2d');
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this.ctx.strokeStyle = 'rgb(0, 0, 0)';
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this.ctx.fillStyle = 'rgb(0, 0, 0)';
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this.cur = [0, 0];
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this.line_width = 2.0;
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this.dot_radius = 3.5;
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this.setColor = function(color, bg, fg) {
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color %= colors.length;
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var red = (colors[color][0] * fg) || bg;
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var green = (colors[color][1] * fg) || bg;
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var blue = (colors[color][2] * fg) || bg;
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red = Math.round(red * 255);
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green = Math.round(green * 255);
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blue = Math.round(blue * 255);
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var s = 'rgb(' + red + ', ' + green + ', ' + blue + ')';
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this.ctx.strokeStyle = s;
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this.ctx.fillStyle = s;
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}
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this.render = function(data,canvasWidth,lineCount) {
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var idx = 1;
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var rela = document.getElementById('graph');
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if (lineCount == 0)
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lineCount = 1;
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var edge_pad = this.dot_radius + 2;
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var box_size = Math.min(18, Math.floor((canvasWidth - edge_pad*2)/(lineCount)));
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var base_x = canvasWidth - edge_pad;
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for (var i in data) {
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var row = document.getElementById("chg_"+idx);
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if (row == null)
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continue;
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var next = document.getElementById("chg_"+(idx+1));
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var extra = 0;
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cur = data[i];
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node = cur[1];
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in_l = cur[2];
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var rowY = row.offsetTop + row.offsetHeight/2 - rela.offsetTop;
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var nextY = (next == null) ? rowY + row.offsetHeight/2 : next.offsetTop + next.offsetHeight/2 - rela.offsetTop;
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for (var j in in_l) {
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line = in_l[j];
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start = line[0];
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end = line[1];
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color = line[2];
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this.setColor(color, 0.0, 0.65);
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x = base_x - box_size * start;
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this.ctx.lineWidth=this.line_width;
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this.ctx.beginPath();
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this.ctx.moveTo(x, rowY);
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if (start == end)
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{
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this.ctx.lineTo(x,nextY+extra,3);
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}
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else
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{
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var x2 = base_x - box_size * end;
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var ymid = (rowY+nextY) / 2;
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this.ctx.bezierCurveTo (x,ymid,x2,ymid,x2,nextY);
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}
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this.ctx.stroke();
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}
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column = node[0];
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color = node[1];
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radius = this.dot_radius;
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x = base_x - box_size * column;
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this.ctx.beginPath();
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this.setColor(color, 0.25, 0.75);
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this.ctx.arc(x, rowY, radius, 0, Math.PI * 2, true);
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this.ctx.fill();
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idx++;
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}
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}
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}
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