Your demo is ugly (Sorry, had to say it), but it works and I like the fact that you can pan around by clicking anywhere. That is not obvious however and might need a hint somewhere. The custom scrollbar is not intuitive because of the coloring, I kept thinking the track was the slider and vice-versa. After playing a bit more with it I discovered you have color themes. DEFINITELY use one of those by default. The grayscale theme is super boring and completely opposite of your goal which I believe is to "show off" your project schedule.
I think you should be able to pan by dragging the chart header (the months/years).
Turn on alternating columns in the demo. Also use the square or round corners but not the one in the middle.
Also the task tree could stand to be widened a bit by default, it looks weird that in your demo you start off with a bunch of tasks only showing halfway.
Expand/Collapse should be a single button, the icon of which changes to indicate state.
When you do a snapshot it is not clear what the output file is going to be I just got a file called "chart" - is that an Image? Is it a MS Project file?
I'm not sure you want to use the full blow "File/Edit/Format/View/Help" menu. It blends in too much with the chrome of the browser window and you would probably be better served (in terms of UI/UX) by using standard icons for the most commonly used items. Also add contrast to that menu/toolbar (Still talking only about file/edit/etc...) so that it doesn't blend with browser chrome so much.
The units on the "Zoom tool" in the bottom right corner are not obvious to me (the P and W)
Go to Rails 3, a lot of the ways of doing things in 2.X will be deprecated in 3.1 and removed in 3.2, so just save yourself the hassle. Rails 3 also cleans up a tremendous amount of code and removes a lot of the 'obtrusive' Javascript from your views.
As far as 1.9.2, if you plan to do deployment (Even for testing) any time soon on Heroku (the coolest, if not the best hosting solution for Rails) then you may want to kick back to 1.8.7, because Heroku won't support 1.9.2 until a final is released.
I think you should be able to pan by dragging the chart header (the months/years).
Turn on alternating columns in the demo. Also use the square or round corners but not the one in the middle.
Also the task tree could stand to be widened a bit by default, it looks weird that in your demo you start off with a bunch of tasks only showing halfway.
Expand/Collapse should be a single button, the icon of which changes to indicate state.
When you do a snapshot it is not clear what the output file is going to be I just got a file called "chart" - is that an Image? Is it a MS Project file?
I'm not sure you want to use the full blow "File/Edit/Format/View/Help" menu. It blends in too much with the chrome of the browser window and you would probably be better served (in terms of UI/UX) by using standard icons for the most commonly used items. Also add contrast to that menu/toolbar (Still talking only about file/edit/etc...) so that it doesn't blend with browser chrome so much.
The units on the "Zoom tool" in the bottom right corner are not obvious to me (the P and W)
Otherwise its looking really good. Keep at it!