In the previous chapter, we saw how to create a custom cartesian chart using Sencha Charts. In this chapter, we will look at how a polar chart works and how to create a custom polar chart. We will create a custom polar chart—Market Clock—where we will use the polar coordinate system to create a 12-hour clock showing the opening and closing times of different stock exchanges.
In this chapter, you will learn how to create custom polar charts by:
Creating a custom sprite
Creating a custom series
Creating a custom polar chart
Taking care of legends, centering, and resizing
Using the custom polar chart in an application