[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

WORKAROUND: Outline View does not call "selection changed" handler

Subject: WORKAROUND: Outline View does not call "selection changed" handler
From: "Adrian R. Foltyn" <email@hidden>
Date: Tue, 17 Jan 2006 11:58:27 +0100
Delivered-to: email@hidden
Delivered-to: email@hidden

Hello to all AppleScript Studio mailing list subscribers,

I found a somewhat simple solution to the problem that an Outline View does not call the "selection changed" handler. The workaround involves creating a subclass of NSOutlineView, registering itself to receive the NSOutlineViewSelectionDidChange notification and posting a NSTableViewSelectionDidChange notification.

I'm going to demonstrate this by modifying the example project "Outline" with you. So let's go.

1. Open the example project "Outline" located in:

/Developer/Examples/AppleScript Studio/Outline/Outline.xcodeproj

2. Click the disclosure triangle next to the "Resources" folder in the Xcode "Groups & File" list. 3. Double click the "MainMenu.nib" file to open it in Interface Builder. 4. In Interface Builder: Select the "Show Inspector" command from the "Tools" menu in the main menu bar. 5. Select "AppleScript" from the first popup button in the Inspector Window. 6. Click the Outline View in the "Outline" window until the title of the Inspector Window changes to "NSOutlineView Inspector". 7. Click the disclosure triangle next to "Data View" in the "Event Handlers" list of the Inspector Window. 8. Click the checkbox for "selection changed". 9. Make sure the checkbox next to "Application.applescript" in the "Script" list of the Inspector Window is checked. 9. Click the "Edit" button at the bottom of the Inspector Window. 10. In Xcode: Replace the line "(*Add your script here.*) in the "selection changed" handler with the command:

	log "Selection Changed"

-- Where are we? -------------------------------- -- -- We opened the "Outline" example project, opened the MainMenu.nib file -- and set the Outline View in the "Outline" window to call the "selection changed" -- handler. We also modifed the "selection changed" handler to log a message to -- the run log to inform us that the script is actually performing this handler. If we -- would build and run this project now, changing the selection of the outline view -- would do nothing. Let's go on and create a subclass of NSOutlineView to fix this problem. -------------------------------------------------------

11. Go back to Interface Builder. 12. Click on the "Classes" tab in the "MainMenu.nib (English)" window to bring up the Class Browser. 13. Click on the Outline View in the "Outline" window until the right most browser column of the Class Browser reads "NSOutlineView". 14. Select the command "Subclass NSOutlineView" from the "Classes" menu in the main menu bar. 15. A new browser column has been added reading "MyOutlineView". 16. Change the name of "MyOutlineView" to "ASKOutlineViewWorkaround" and press the return key to confirm. 17. Select the command "Create Files for ASKOutlineViewWorkaround" from the "Classes" menu in the main menu bar. 18. Accept the default settings in the sheet that appears by pressing the "Choose" button. 19. Click the Outline View in the "Outline" window until the title of the Inspector Window changes to "NSOutlineView Inspector". 20. Select "Custom Class" from the first popup button in the Inspector Window. 21. In the "Class" list of the Inspector Window select "ASKOutlineViewWorkaround" instead of "NSOutlineView"

-- Where are we? -------------------------------- -- -- We created a subclass of NSOutlineView, created the files and set the -- Outline View in the "Outline" window to be of class "ASKOutlineViewWorkaround". -------------------------------------------------------

22. Go back to Xcode. 23. Click the disclosure triangle next to the "Other Sources" folder in the Xcode "Groups & File" list. 24. Double-click the "ASKOutlineViewWorkaround.h" file to edit the header file for our custom outline view. 25. Replace the contents of this file with:


#import <Cocoa/Cocoa.h>

@interface ASKOutlineViewWorkaround : NSOutlineView
{
	NSNotificationCenter *nc;
}

- (void)postWorkaroundNotification;

@end

26. Go back to the "Groups & File" list and double-click the "ASKOutlineViewWorkaround.m" file to edit the implementation file for our custom outline view. 27. Replace the contents of this file with:


#import "ASKOutlineViewWorkaround.h"

@implementation ASKOutlineViewWorkaround

-(void)awakeFromNib {
	nc = [NSNotificationCenter defaultCenter];
	[nc		addObserver:	self
			selector:		@selector(postWorkaroundNotification)
			name:			NSOutlineViewSelectionDidChangeNotification
			object:			self
	];
 }

- (void)postWorkaroundNotification { [nc postNotificationName:NSTableViewSelectionDidChangeNotification object:self]; }

@end

28. Build and run this project. 29. When you change your selection in the outline view the run log should display the message "Selection Changed".


_______________________________________________
Do not post admin requests to the list. They will be ignored.
Applescript-studio mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:
http://lists.apple.com/mailman/options/applescript-studio/email@hidden

This email sent to email@hidden

Follow-Ups:
- Re: WORKAROUND: Outline View does not call "selection changed" handler
  - From: "Adrian R. Foltyn" <email@hidden>

Prev by Date: Re: Built Studio Apps Won't Run On Other Computers
Next by Date: Re: WORKAROUND: Outline View does not call "selection changed" handler
Previous by thread: Re: plain text editor and text view
Next by thread: Re: WORKAROUND: Outline View does not call "selection changed" handler
Index(es):
- Date
- Thread

Home