A Column definition class which renders color. I have used Ext.ux.colorpick.Field. Nothing special, just extended the ‘Ext.grid.column.Template‘. It is also possible to implement using widget column nut I prefer the simplest way always.
Mandelbrot Set/Fractal with Vanilla JS. Here I used web workers to move the fractal calculations to a separate thread. Currently, web workers is not being used in most projects, but I am sure the multithreading web applications and appropriate frameworks of web workers has potential to be used in the future.
This post is about an editable grid with editable multi-select combobox. This solution is for extjs 4.2. In the newer versions (>= v5.1) the ‘multiSelect’ property is deprecated. If you do not want to have problems during your framework upgrade in the future, I would suggest not to use the deprecated functionality and use the tag field.