From a61d8257645660e3089c29e99e18f83b6f2b1be9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jarom=C3=ADr=20=C4=8Cervenka?= <cervajz@cervajz.com>
Date: Sun, 28 Oct 2012 13:36:19 +0100
Subject: [PATCH 1/2] Added support for redrawing chart from the external
 script.

---
 lib/google_visualr/base_chart.rb | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/lib/google_visualr/base_chart.rb b/lib/google_visualr/base_chart.rb
index 6ae00ca..f29eaa2 100644
--- a/lib/google_visualr/base_chart.rb
+++ b/lib/google_visualr/base_chart.rb
@@ -15,6 +15,10 @@ def initialize(data_table, options={})
     def chart_name
       class_name
     end
+    
+    def draw_fn_name element_id
+      "draw_#{element_id.sub('-', '_')}_Chart"
+    end
 
     def options
       @options
@@ -34,17 +38,21 @@ def add_listener(event, callback)
     #  *div_id            [Required] The ID of the DIV element that the Google Chart should be rendered in.
     def to_js(element_id)
       js  = "\n<script type='text/javascript'>"
-      js << "\n  google.load('visualization','1', {packages: ['#{package_name}'], callback: function() {"
-      js << "\n    #{@data_table.to_js}"
+      js << "\n  google.load('visualization','1', {packages: ['#{package_name}']});"
+      js << "\n  google.setOnLoadCallback(#{draw_fn_name element_id});"
+      js << "\n "
+      js << "\n function #{draw_fn_name element_id}() { "
       js << "\n    var chart = new google.visualization.#{chart_name}(document.getElementById('#{element_id}'));"
+      js << "\n    #{@data_table.to_js}"
       js << "\n    chart.draw(data_table, #{js_parameters(@options)});"
       @listeners.each do |listener|
         js << "\n    google.visualization.events.addListener(chart, '#{listener[:event]}', #{listener[:callback]});"
       end
-      js << "\n  }});"
+      js << "\n  };"
+
       js << "\n</script>"
-      js
-    end
+      js    
+   end
 
   end
 

From 271a98eeba94a3ce90ea278c972c566e4f55e9c5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jarom=C3=ADr=20=C4=8Cervenka?= <cervajz@cervajz.com>
Date: Sun, 28 Oct 2012 13:46:59 +0100
Subject: [PATCH 2/2] Fixed: Typo in draw_fn_name.

---
 lib/google_visualr/base_chart.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/google_visualr/base_chart.rb b/lib/google_visualr/base_chart.rb
index f29eaa2..6f7fae9 100644
--- a/lib/google_visualr/base_chart.rb
+++ b/lib/google_visualr/base_chart.rb
@@ -17,7 +17,7 @@ def chart_name
     end
     
     def draw_fn_name element_id
-      "draw_#{element_id.sub('-', '_')}_Chart"
+      "draw_#{element_id.gsub('-', '_')}_Chart"
     end
 
     def options