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Re: Delaying the Opening of Files on Launch
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Re: Delaying the Opening of Files on Launch


  • Subject: Re: Delaying the Opening of Files on Launch
  • From: email@hidden
  • Date: Wed, 14 Mar 2007 23:42:31 +0800

Hi,
I'm not sure if I fully understand the issue you encounter.
If the issue is arise because the modal loop, I wonder if - (void) performSelector:(SEL)aSelector target:(id)target argument:(id) anArgument order:(unsigned)order modes:(NSArray *)modes can help.
just schedule the invocation in default run loop mode, and then after the modal loop has finished the invocation will be invoked.
HTH,
James


On Mar 14, 2007, at 6:08 AM, KJ Walker wrote:

The following issue involves an application based upon a multiple document type which has several rare but potentially time consuming requirements during the launch/startup period, including loading of support data and possibly prompting the user for missing resources (network locations, optional files, etc).

Apple documentation for NSApplication indicates the delegates usually sees the following methods in the this order.

delegate applicationWillFinishLaunching:
delegate application:openFile:
delegate applicationDidFinishLaunching:

I find the delegate sometimes receives messages for application:openFile: before the activities for applicationWillFinishLaunching: are completed. This occurs when a modal window has interrupted the activities of applicationWillFinishLaunching:. I understand why this is happening – the use of a modal loop related method permits the apple event activities to continue via specialized event loop processes.

Any thoughts on what the best way to delay opening files/documents from the open event?

I have attempted to store the filenames and then opened them later via a NSDocumentController’s openDocumentWithContentsOfURL:display:error:, however this somethings results in documents that are never shown even when the display parameter is YES (usually when another modal window has suspended the documents opening with a warning or request of the user). This approach also creates a situation where the application deletegate’s application:openFile: method returns a result that is only a guess and not necessary the correct value since the code has no way of knowing if the document or file sent as part of the AppleEvent can be fully processed until the application’s support data is fully read in.

I have also used NSWorkspace openfile: attempting to generate the open event all over again, however sometimes I've had the wrong application launched (when multiple but different version of the same application can be located) and the documentation for these NSWorkspace methods indicates the calling application is deactived and so I figured using this avenue is not correct since it could end up deactivating and then reactivating the application multiple times (with multiple files on launch).

Thanks,

Kevin (KJ) Walker
Senior Mac Developer
SmartSound Software, Inc.



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References: 
 >Delaying the Opening of Files on Launch (From: KJ Walker <email@hidden>)

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