From: Evert Timberg <evert.timberg+github@gmail.com>
Date: Sat, 23 Apr 2016 01:04:55 +0000 (-0400)
Subject: Add in a beforeRender plugin event. Makes it easier to handle things that need to... 
X-Git-Tag: 2.1.0~54
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f6f8fe59592a503644102b30cda03255e637fec7;p=thirdparty%2FChart.js.git

Add in a beforeRender plugin event. Makes it easier to handle things that need to happen once at the start of animation but not on every frame
---

diff --git a/docs/07-Advanced.md b/docs/07-Advanced.md
index b222561db..4bedca3e0 100644
--- a/docs/07-Advanced.md
+++ b/docs/07-Advanced.md
@@ -390,6 +390,10 @@ Plugins should derive from Chart.PluginBase and implement the following interfac
 	beforeUpdate: function(chartInstance) { },
 	afterUpdate: function(chartInstance) { },
 
+	// This is called at the start of a render. It is only called once, even if the animation will run for a number of frames. Use beforeDraw or afterDraw 
+	// to do something on each animation frame
+	beforeRender: function(chartInstance) { },
+
 	// Easing is for animation
 	beforeDraw: function(chartInstance, easing) { },
 	afterDraw: function(chartInstance, easing) { }
diff --git a/src/core/core.controller.js b/src/core/core.controller.js
index 074cf591d..9e7b52253 100644
--- a/src/core/core.controller.js
+++ b/src/core/core.controller.js
@@ -272,6 +272,7 @@ module.exports = function(Chart) {
 		},
 
 		render: function render(duration, lazy) {
+			Chart.pluginService.notifyPlugins('beforeRender', [this]);
 
 			if (this.options.animation && ((typeof duration !== 'undefined' && duration !== 0) || (typeof duration === 'undefined' && this.options.animation.duration !== 0))) {
 				var animation = new Chart.Animation();