Changeset - 97f8ae90566a
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Mads Kiilerich - 11 years ago 2014-08-21 23:46:55
madski@unity3d.com
graph: handle failing canvas creation

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1 file changed with 4 insertions and 0 deletions:
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kallithea/public/js/graph.js
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@@ -8,48 +8,52 @@
 
// derived from code written by Scott James Remnant <scott@ubuntu.com>
 
// Copyright 2005 Canonical Ltd.
 
//
 
// This software may be used and distributed according to the terms
 
// of the GNU General Public License, incorporated herein by reference.
 

	
 
var colors = [
 
	[ 1.0, 0.0, 0.0 ],
 
	[ 1.0, 1.0, 0.0 ],
 
	[ 0.0, 1.0, 0.0 ],
 
	[ 0.0, 1.0, 1.0 ],
 
	[ 0.0, 0.0, 1.0 ],
 
	[ 1.0, 0.0, 1.0 ],
 
	[ 1.0, 1.0, 0.0 ],
 
	[ 0.0, 0.0, 0.0 ]
 
];
 

	
 
function BranchRenderer(canvas_id, content_id) {
 

	
 
	this.canvas = document.getElementById(canvas_id);
 
	var t = document.getElementById(content_id);
 
	
 
	if (!document.createElement("canvas").getContext)
 
		this.canvas = window.G_vmlCanvasManager.initElement(this.canvas);
 
	if (!this.canvas) { // canvas creation did for some reason fail - fail silently
 
		this.render = function(data,canvasWidth) {};
 
		return;
 
	}
 
	this.ctx = this.canvas.getContext('2d');
 
	this.ctx.strokeStyle = 'rgb(0, 0, 0)';
 
	this.ctx.fillStyle = 'rgb(0, 0, 0)';
 
	this.cur = [0, 0];
 
	this.line_width = 2.0;
 
	this.dot_radius = 3.5;
 
	this.close_x = 1.5 * this.dot_radius;
 
	this.close_y = 0.5 * this.dot_radius;
 

	
 
	this.calcColor = function(color, bg, fg) {
 
		color %= colors.length;
 
		var red = (colors[color][0] * fg) || bg;
 
		var green = (colors[color][1] * fg) || bg;
 
		var blue = (colors[color][2] * fg) || bg;
 
		red = Math.round(red * 255);
 
		green = Math.round(green * 255);
 
		blue = Math.round(blue * 255);
 
		var s = 'rgb(' + red + ', ' + green + ', ' + blue + ')';
 
		return s;
 
	}
 

	
 
	this.setColor = function(color, bg, fg) {
 
		var s = this.calcColor(color, bg, fg);
 
		this.ctx.strokeStyle = s;
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