A while ago I have written a blog on how to change the field type inside a row editor dynamically with ExtJs 3. Since then I received a number of requests for the same example in ExtJs 4. It has been way overdue, so here it is.
Recently, I got a request from a Highcharts user asking me how to improve the user interaction on pie charts; when the pointer is hovered over a slice:
1. An arrow appears outside the pie section
2. A text box appears in the center of the donut charts showing the hovered section data
I think this is a good exercise and demonstration to show how flexible and powerful Highcharts can be. In this blog, I will show you how to convert a normal donut chart into the one showing here and you can try the online demo.
I have fixed the demo and it is working fine now. Also I have created a github repository, ExtJs_Examples, which contains all the one off examples code that you will find in joekuan.org (more will be checking-in).