HTMLDialog vs WebDialog?

Dan Rathbun

The error codes posted above.

... are occurring (according to your error messages,) in " medeek_roof_truss.rbs", line 5726, in callback method onLButtonDown.

In the first you are calling a *() method upon an object that is referencing the global singleton nil object. Since the NilClass does not have an "asterisk" method, a NoMethodError is raised.

The second method is caused by your code expecting a Float object, but getting a String object instead.

The answer is simple. Whenever an object reference could reference disparate types (classes) of obejcts, use a combination of type validation and Ruby rescue clauses with the onLButtonDown callback method.

medeek

Okay 95% of that just went over my head, but I'll try and decipher into terms I can understand.

But why would this error only be raised for SketchUp running on MacOS and not Windows?

Dan Rathbun

Basically I'm trying to prompt you to learn how to read Ruby error and backtrace messages.
“filename:lineNo: inmethod”‘ or “filename:lineNo.”`

http://ruby-doc.org/core-2.2.4/doc/syntax/exceptions_rdoc.html
http://ruby-doc.org/core-2.2.4/Exception.html

@medeek said:

Okay 95% of that just went over my head, but I'll try and decipher into terms I can understand.

Data validation - Wikipedia

(en.wikipedia.org)

An example in Ruby of testing if an object reference is pointing at an object of a certain class:
if obj.is_a?(NilClass)
... or ...
if obj.is_a?(Float)

An example in Ruby of validating that an object reference call responds to a certain method call:
if obj.respond_to?(:methname)
... and testing for the "asterisk" method specifically:
if obj.respond_to?(:*)

@medeek said:

But why would this error only be raised for SketchUp running on MacOS and not Windows?

I don't know (offhand) as I avoid Macs myself. (But OSX and MS Windows use different sets of keycodes.)

Actually, looking at the backtraces (in your original error listing) the errors are kicked off by a LButtonDown keypress, but are occurring in the `` create_timber_geometry()`' method, lines 1064 and 1355.