[bug #15710] PrinterPanel -> Preview button -> Uncaught exception when no previewing app can be executed

[Nikolaus Waxweiler]

URL:
  <http://savannah.gnu.org/bugs/?func=detailitem&item_id=15710>

                 Summary: PrinterPanel -> Preview button -> Uncaught
exception when no previewing app can be executed
                 Project: GNUstep
            Submitted by: madleser
            Submitted on: Sat 02/11/06 at 17:27
                Category: Gui/AppKit
                Severity: 3 - Normal
              Item Group: Bug
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open

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Details:

When no previewing application is found, "gv" is set as the default app, but
nothing is done to check if gv is actually installed. A solution would be to
replace gnustep/libs/gui/trunk/Source/GSPrintOperation.m, line 147 ("[task
launch];") with:

          if ([task validatedLaunchPath])
            { 
              [task launch];
            }
          else
           { 
             /* XXX: Let the user specify something, check if it exists and
save it to standardUserDefaults? */
             NSRunAlertPanel(@"Error", @"Could not find a previewing
application.",
                             @"OK", NULL, NULL);
             success = NO;
           }

A possible interface-design problem with this is that when clicking "OK", the
PrintPanel disappears, so the check would have to be implemented in
NSPrintPanel.m. 
Uh.. but maybe it's not an issue. No idea.






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