SANS GUI: disable Reduce button while a file is loading until UI is ready

[Mathieu Doucet]

Disable Reduce button while a file is loading until UI is ready

[Mathieu Doucet]

(In [10004]) Fixes #2640

[Steve Williams]

My computer seems too load fast to notice the disabling

[Michael Reuter]

No matter which dataset I load from Test/Data/SANS2D, the reduce button never disables itself during file load. While doing this, I watched the MantidPlot progress bar and saw a noticeable start/end sequence while the reading was occurring. It looks like the reduce button is not getting the proper signal to disable itself.

[Mathieu Doucet]

This description of this ticket is mis-leading. Looking back, what it really means is that the reduce button is disabled when a reduction file is loaded, and not when a data file is simply chosen. A reduction file is the file produced when doing ctrl-S (or using the File menu). Since loading such a file no longer needs a long time, it's very hard to see the disabled button. Another way to see this feature would be to hit the reduce button after selecting a data file. The reduce button should go gray until the reduction is completed.

[Michael Reuter]

That makes much more sense. Yes, the reduce button does disable itself while the reduction is ongoing, so this works.

[Stuart Campbell]

This ticket has been transferred to github issue ​3487