ruby - Javascript event loop/message pump for Google Sketchup plugin -

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i'm working on plugin google sketchup written using ruby api. within api webdialog class 1 can use render html , move data between webdialog , ruby side of plugin code. i'm using class build ui plugin.

data sent webdialog ruby side asynchronously. due subpar documentation not aware of , i'm ways plugin it's began create problems me. specifically: when multiple successive calls made webdialog ruby side, last call executed. so, need devise sort of "bridge" prevent calls webdialog ruby side getting lost -- is, think, "event loop" or "message pump" system.

my problem haven't idea of how this. i'm hoping can provide me sort of resource lays out framework how such system should work -- sort of checks needed, sequence in they're performed, etc. know can terrifically complex task, need basic: basically, way of making javascript stop when send request ruby, not proceeding until data need back, , dealing potential errors may crop up.

any appreciated!

i've spent great deal of time webdialog class. planned write such pump, found differently more reliable results.

( webdialog findings: http://forums.sketchucation.com/viewtopic.php?f=180&t=23445 )

alternative method

sketchup > javascript

my alternative method didn't try push data webdialog ruby. instead had ruby pump webdialog because webdialog.execute_script synchronous.

i send command webdialog query. javascript processes , put result hidden input element use ´webdialog.get_element_value` fetch content of.

all of wrapped wrapper method process return value , convert appropriate ruby objects. http://www.thomthom.net/software/sketchup/tt_lib2/doc/tt/gui/window.html#call_script-instance_method

the outline is:

  1. make call ( .execute_script ) clear hidden input element
  2. make actual call js process , put return value hidden input
  3. use .get_element_value fetch hidden input value

all synchronous.

javascript pump

javascript > sketchup

if need pump information js, think need this:

  • js: push messages message queue
  • js: send message su there messages
  • su: when callback notifies new messages, query js next message , continue until there no more messages. should work it'd similar method described earlier.

the concept store messages , hand on control sketchup side can pump synchronously.

(untested theory.)


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