Description Pratik Shah 2003-09-25 17:04:38 EDT

We have added several pages to the Properties dialog, and a lot of these can
potentially modify the workspace.  Unfortunately, under the current
implementation, hitting OK in the Properties dialog after changing a few
pages means that each page will launch its own ProgressMonitorDialog, do its
thing, and then build and/or validate the project.  The biggest disadvantage
is that the project is being built/validated several times, which can be a
time-consuming process.  Having several progress dialogs pop up is also a 
usability concern.

I have noticed that the Preferences dialog has the same problem.  You can do
the following to see the problem:
1)  Go to Java -> Compiler and change one of the options that would cause it
re-compile all project in the workspace.
2) Without hitting Apply or OK, go to Plug-in Development -> Compilers and
change another option there that can cause it to re-compile all projects as 
well.
Now, when you hit OK, it will try to re-compile all the projects twice.

So, as a solution to this problem, I propose that the Property/Preferene 
dialogs use a WorkspaceModifyComposedOperation when invoking performOk() on all 
pages and pass an IProgressMonitor, that can be shared by all the methods, as a 
parameter to that method.