Current filters and save/restore widgets

[kum-deepak]

After running grunt server go to http://localhost:8888/web/examples/current-filters.html. This example uses stock.js as is (this meant copying ndx.json).

This demonstrates two capabilities:

Current filters widget

• As filters are applied/removed it updates the widget.
• Individual filters can be cleared by clicking the X icon.
• There is also a clear all which works similar to chartGroup.filterall however it does so by restoring an empty list as filters - effectively removing all filters.
• Currently, the filters are just converted to string - need to take the help of filter printers.

Saved filter states

• Click on save current state to save - it will get added to the saved state list.
• On mouse hover, it will show JSON representation of the state.
• Clicking on the state will restore it.
• Clicking on X will remove this.
• I am thinking of populating a couple of sample items from a JSON file to demonstrate that states can be loaded from external sources.

Currently experimental; will proceed based on feedback.

[gordonwoodhull]

This is neat!

Do you think it would be worthwhile to make a reusable widget out of the Current Filters display? The Saved Filter States is probably just for the demo, but I imagine people will want the Current Filters widget, and that's a fair amount of code to copy/paste.

[kum-deepak]

I am not going to merge this as of now. Before the final release, the current filters would be created as a widget.

[kum-deepak]

I decided to merge this. Keeping too many open PRs is not great - I realized the hard way :smile: