[news.eclipse.tools] Re: View instances across different pages/workspace

[Thomas Mäder <thomas_maeder@xxxxxxx>]

Although you have two instances of the view/editor, the share the same model. In
the instance of the task list, it's the markers on the resources, for the editor
it's a shared document. There is a notification mechanism to update the views on
changes.

Thomas

Cheng-Yee Lin wrote:

> I have some further questions below.
>
> David Springgay wrote:
>
> > Cheng-Yee Lin wrote:
>
> > > When there are multiple pages (workspaces in the December release) opened
> > > with default perspecives, the user can see navigator, properties, tasks,
> > > and outline views on all those pages.
>
> > > From each individual view, how many instances are there for those pages?
> > > Is it a single instance shared by all the pages?  Or, are there multiple
> > > instances and each page contains one instance?  How is this being
> > > handled in Eclipse?  As a client of the Eclipse, what do we need to do
> > > to produce the consistent behavior with these views?
>
> > The following information was taken directly from the latest javadoc for
> > IWorkbenchPage ..
>
> > A workbench page consists of an arrangement of views and editors intended
> > to be presented together to the user in a single workbench window.
>
> > A page can contain 0 or more views and 0 or more editors. These views and
> > editors are contained wholly within the page and are not shared with other
> > pages.  The layout and visible action set for the page is defined by a
> > perspective.
>
> > The number of views and editors within a page is restricted to simplify
> > part management for the user.  In particular:
>
> > * Only one instance of a particular view type may exist within a workbench
> > page.
> > * Only one editor can exist for each editor input within a page.<li>
>
> > If your view appears within a page it will be disposed when the page is
> > disposed.
>
> 1. If I open 2 Workbench pages with default perspectives for both, I will
>    have one task list for each page.  However, if I enter a task in the
>    first page and another one in the second page, I can see both tasks
>    from both pages.  Are they really two separate instances?  If so,
>    how do they sync up?
>
> 2. Again, if I have two pages and I open the same resource, e.g. foo.txt,
>    from the navigators on both pages, there are two instances of editors
>    for the resource, one on each page.  When I enter some text in the
>    editor on one page, I can see the same change in the editor
>    instance on the other page.  (The cursor positions in both editors
>    might be different, though).  How/when do the two instance get in sync?