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[Plot] Try multiple chart options

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Choose among multiple chart options, WTD-1070.
This commit is contained in:
Victor Woeltjen 2015-04-06 14:15:34 -07:00
parent eba980c720
commit 3db8c1a32d
2 changed files with 38 additions and 13 deletions
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2
platform/features/plot/src/Canvas2DChart.js
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@ -87,7 +87,7 @@ define(
}
// ...and add points to it...
for (i = 2; i < buf.length - 1; i = i + 2) {
for (i = 2; i < points * 2; i = i + 2) {
c2d.lineTo(x(buf[i]), y(buf[i + 1]));
}

49
platform/features/plot/src/MCTChart.js
View File

@ -4,8 +4,8 @@
* Module defining MCTChart. Created by vwoeltje on 11/12/14.
*/
define(
["./GLChart"],
function (GLChart) {
["./GLChart", "./Canvas2DChart"],
function (GLChart, Canvas2DChart) {
"use strict";
var TEMPLATE = "<canvas style='position: absolute; background: none; width: 100%; height: 100%;'></canvas>";
@ -43,22 +43,38 @@ define(
* @constructor
*/
function MCTChart($interval, $log) {
// Get an underlying chart implementation
function getChart(Charts, canvas) {
// Try the first available option...
var Chart = Charts[0];
// This function recursively try-catches all options;
// if these all fail, issue a warning.
if (!Chart) {
$log.warn("Cannot initialize mct-chart.");
return undefined;
}
// Try first option; if it fails, try remaining options
try {
return new Chart(canvas);
} catch (e) {
$log.warn([
"Could not instantiate chart",
Chart.name,
";",
e.message
].join(" "));
return getChart(Charts.slice(1), canvas);
}
}
function linkChart(scope, element) {
var canvas = element.find("canvas")[0],
activeInterval,
chart;
// Try to initialize GLChart, which allows drawing using WebGL.
// This may fail, particularly where browsers do not support
// WebGL, so catch that here.
try {
chart = new GLChart(canvas);
} catch (e) {
$log.warn("Cannot initialize mct-chart; " + e.message);
return;
}
// Handle drawing, based on contents of the "draw" object
// in scope
function doDraw(draw) {
@ -118,6 +134,15 @@ define(
}
}
// Try to initialize a chart.
chart = getChart([GLChart, Canvas2DChart], canvas);
// If that failed, there's nothing more we can do here.
// (A warning will already have been issued)
if (!chart) {
return;
}
// Check for resize, on a timer
activeInterval = $interval(drawIfResized, 1000);