thanks to MrMormon
in Pd-l2ork commit 67e02827e599004f064ee7a1f54fa13d0faf9cfc

refactor dialog_canvas.html to use javascript objects instead of ["name1", "value1", "name2", "value2", etc.] arrays

change fielddesc_getfloat to fielddesc_getcoord so that the (admittedly arcane) scaling/quanta syntax can be used with [draw] methods where it makes sense

do a proper loadbang for canvas fields (needs more testing)