Updated.
] can’t move to the end, limintation on Blockly.
I also add a “Widget” tab for demo, this will be move to another plugin later. And will be used in WYSIWYG editor to handle editing of widget & macro call. @jeremyruston talked about his vision on editing widget in WYSIWYG editor in the live, I’m not sure I get them all. But this is what I’m doing.
The benefit of blockly here is it have type check, each block have limintation like nextStatement: 'filter_run',, so user won’t need to trying many combination of a-z 26 character, only need to try few combinations of different colors of blocks. The “limitation” is a source of affordance.