OnPageChange event

[Jim]

I wanted to detect a Scene change in SketchUp. The only method I could find was onContentsModified of the PagesObserver, which apparently gets fired twice.

I know it could be worked-around using a timer.

I just can't stop asking myself "Where's the onPageChange" event?

[chrisglasier]

And in Google SketchUp Ruby API what's the difference between

PagesObserver.onContentsModified

and

PagesObserver.onElementAdded

If I add a scene am I not modifying the pages content?

There is no pageObserver. So if I update a page am I modifying the pages content?

I know if I change the selected_page, PagesObserver.onContentsModified tells me which page, but I am not really modifying the content aren't I just getting data at that stage?

I think we should be told!

[chrisglasier]

   def CgScenes.page_contents_modified(pages)
		a = 0
		#puts(pages)
		pages.each do | page |
			if page == pages.selected_page
			@ind = a
			puts "Modified " + pages[a].name.to_s
			end
		a = a + 1
		end
		array = [0,@ind]		#colNo,activeRow
		array = array.join(",")
		@dlg.execute_script("sceneSliderAdjust('#{array}');")
    end

One for the old; one for the new!

[chrisglasier]

@chrisglasier said:

And in Google SketchUp Ruby API what's the difference between

PagesObserver.onContentsModified

and

PagesObserver.onElementAdded

...

Now I have got to the point where I am checking what happens when the scene machine is plugged in to a model with no scenes. It is sensible to add one or more scenes to get started. But when I do that onContentModified sets off the JavaScript function for a scene selected from an existing set and throws an error. I suppose I will find a way round, but it does not seem right when there is " onElementAdded." There again I could have missed something fundamental. Either way I would appreciate some clarification.

Thanks

Chris