Re: GWorkspace openFile & ImageViewer

[Enrico Sersale]

On Tue, 8 Apr 2003, Marko Riedel wrote:

> Hi folks,
>
> I am trying to get GPSText to open PS and PDF files when they are
> double-clicked in the workspace browser. This was suggested to me by
> Nicolas Roard.
>
> I found that GWorkspace launches the application correctly, but it
> repeats the file name among the command line arguments. My application
> parses these as well, so that it opens the file twice. (I could fix
> this by checking whether the file has already been opened, but I would
> prefer to understand what exactly is happening.) I have also noticed
> that GWorkspace tries to lauch a second copy of the application when I
> click on a second file, whereas it should message the process that is
> already running to open the file.
>
> I was curious to know whether my code was the problem, so I compiled
> and installed ImageViewer. It seems to have the same problem: open a
> TIFF file and the app launches, open a second file and GWorkspace does
> not message the process that is already running and tries to launch
> another copy of ImageViewer instead.
>
> Maybe someone can help me out here.
>
> Best regards,

No, GWorkspace doesn't launch anything.
It only gets the "right" application name for the file from NSWorkspace
(getInfoForFile:application:type:), does some icon animation if this is
choosed in the preferences and then calls the NSWorkspace method
-openFile:withApplication:
It is NSWorkspace that keeps in "_launched" an array of the apps it has
launched, not GWorkspace.

An other (related?) problem: some apps, I've tried with Gorm and Ink,
don't open a second file if a file is already open.
For example, try:

gopen a.rtf

"a" is loaded and shown.

gopen b.rtf

"b" is not open.

Adding a NSLog in -loadFileWrapperRepresentation:ofType: shows that, the
second time, this method is not called.