Expressive Presentation of Data with Sencha GXT 3 Charts http://www.sencha.com/blog/building-gxt-charts In a previous article, we discussed the charting library as a whole. However, there is far more to the Sencha GXT 3 charting library than was covered in that introduction. This article discusses a number of the more intermediate and advanced features that you can use — including tweaking the data store backing your chart. With some simple changes to the basic chart setup, you can make your visualizations even more explanatory and expressive. en-us brendan@sencha.com Copyright 2012 2012-07-05T14:00:08+00:00 Comment by calvin ....... .......

]]> Mon, 09 Jul 2012 06:05 GMT http://www.sencha.com/blog//building-gxt-charts#id:31803#date:06:05 Comment by Alex Interestingly, many Flex frameworks made a similar mistake (namely, BlazeDS), where the default behavior during Java &lt;-&gt; AS3 conversion was to turn Java null into a AS3 Number set to 0. Luckily it was easier to implement a pluggable marshaller override to fix this, but it astounds me that the framework developers don’t consider this a show stopper. The absence of a value IS NOT the same as the default value. Interestingly, many Flex frameworks made a similar mistake (namely, BlazeDS), where the default behavior during Java <-> AS3 conversion was to turn Java null into a AS3 Number set to 0.

Luckily it was easier to implement a pluggable marshaller override to fix this, but it astounds me that the framework developers don’t consider this a show stopper.

The absence of a value IS NOT the same as the default value.

]]> Fri, 06 Jul 2012 15:26 GMT http://www.sencha.com/blog//building-gxt-charts#id:31797#date:15:26 Comment by Daniel Looking forward to the ‘gaps in data’ issue being fixed in the ExtJS v4. In the latest version of Ext, null data is is presented as a zero. This is a big no-no when representing data in a graph. We had to manually override a large chunk of the Ext Charting code to fix this careless bug. Looking forward to the ‘gaps in data’ issue being fixed in the ExtJS v4. In the latest version of Ext, null data is is presented as a zero. This is a big no-no when representing data in a graph. We had to manually override a large chunk of the Ext Charting code to fix this careless bug.

]]> Fri, 06 Jul 2012 01:53 GMT http://www.sencha.com/blog//building-gxt-charts#id:31794#date:01:53