Blog | Pages of Interest » Cocoa

Extracting hex value from NSColor

Michael Robinson — Mon, 05 Dec 2011 11:39:49 +0000

Example project available on GitHub – CINSColor+Hex This category on NSColor allows one to get or set an NSColor’s colour using hex values. Intitialising an NSColor with a hexadecimal colour: 1 2 3 4 5 6 7 8 @try { // Both shorthand and full forms of hexadecimal colours are accepted [colorWell setColor:[NSColor colorWithHex:@"#F00"]]; [colorWell [...]

Tile an NSImage Within an NSBezierPath Another snippet I had to write during the great Slider...
Fill a Path With A Scaled Image, Ignoring Image Proportions While continuing to rebuild Slider’s background image features, I was...
Accessing Primitives From NSDictionarys in Cocoa… This “gotcha” had me scratching my head for a little...

Cocoa Warning: Implicitly declaring C library function ‘objc_getClass’

Michael Robinson — Sat, 26 Nov 2011 20:12:36 +0000

In Slider 2, I needed to check for the presence for Sparkle, and only load Slider 2′s included version when Sparkle isn’t found. The code I used to do this is included below, but the point of this article is really to provide a solution to the following warning I encountered: warning: Semantic Issue: Implicitly [...]

Detecting Presence of a Framework Within an NSBundle (Plugin) Introduction Jump to Tutorial In light of Cocoa Warning: Implicitly...
Sliding Modal Dialogs in Cocoa Applications & Bundles Example project available on GitHub – CIModalSheetDialog One thing I...
Return an NSMutableString as NSString Avoiding “Uncaught Error 11″ with Cocoa Another stumbling block on the road to Slider completion was...

Sliding Modal Dialogs in Cocoa Applications & Bundles

Michael Robinson — Fri, 25 Nov 2011 21:15:32 +0000

Example project available on GitHub – CIModalSheetDialog One thing I wanted to be able to use during the development of Slider 2 was modal dialogs that slide out from the top of Rapid Weaver. This was troublesome for me as Slider 2 is a bundle that runs within Rapid Weaver – not as a standalone [...]

More Usability-Oriented Method for Disabling an NSTabViewItem Jump to tutorial I was unable to find a way...
Return an NSMutableString as NSString Avoiding “Uncaught Error 11″ with Cocoa Another stumbling block on the road to Slider completion was...
Accessing Primitives From NSDictionarys in Cocoa… This “gotcha” had me scratching my head for a little...

More Informative NSLog alternative!

Michael Robinson — Mon, 12 Sep 2011 10:13:59 +0000

After becoming used PHP’s very many debugging and error logging tools, I started to find NSLog somewhat lacking… When I finally bothered to search for an alternative, and ended up with CCLog, A Variation on NSLog(). CCLog shows much more information, quoting the developer: My preferred output would be capable of doing this: Show on [...] No related posts.

Detecting Presence of a Framework Within an NSBundle (Plugin)

Michael Robinson — Sun, 31 Jul 2011 02:04:54 +0000

Introduction Jump to Tutorial In light of Cocoa Warning: Implicitly declaring C library function ‘objc_getClass’, this tutorial has been updated. Recently, it was brought to my attention that my method of including a particular framework (Sparkle) inside a plugin was wrong – the way I was doing it (blindly including the framework as if my [...]

Cocoa Warning: Implicitly declaring C library function ‘objc_getClass’ In Slider 2, I needed to check for the presence...
Limit NSNotifications to Notify Within NSBundle Instances Only NSNotifications are wonderful. So long as when using them within...
Using PNG Transparency + the jQuery Colour Change Plugin A tutorial describing how to achieve the "colour change on...

Getting the size of an NSFont

Michael Robinson — Fri, 24 Dec 2010 07:41:10 +0000

You’d think this would work right [NSFont fontSize] Well that didn’t work for me. This did: [[[(NSFont*)[option objectForKey:kFont] fontDescriptor] objectForKey:NSFontSizeAttribute] floatValue] May this post save your some of the frustration I experienced! Related posts: Accessing Primitives From NSDictionarys in Cocoa… This “gotcha” had me scratching my head for a little... Extracting hex value from NSColor [...]

Accessing Primitives From NSDictionarys in Cocoa… This “gotcha” had me scratching my head for a little...
Extracting hex value from NSColor Example project available on GitHub – CINSColor+Hex This category on...

Subclassing NSTextField to Allow Only Numbers

Michael Robinson — Tue, 30 Nov 2010 02:43:36 +0000

Example project available on GitHub – CINumberField Yes, I know that one may use NSNumberFormatter to achieve a similar result – but what I don’t like about about that solution is this: If a user types non-numeric characters into the NSTextField and attempts to tab away from the field, they get the default error sound [...]

More Usability-Oriented Method for Disabling an NSTabViewItem Jump to tutorial I was unable to find a way...
Sliding Modal Dialogs in Cocoa Applications & Bundles Example project available on GitHub – CIModalSheetDialog One thing I...
Listing Methods at Runtime in Objective C Before getting into creating my next Rapid Weaver plugin, I...

Rotate NSImage in an NSImageView

Michael Robinson — Tue, 08 Dec 2009 23:41:34 +0000

As soon as I implemented this I realised how much of a pain it would be to copy out the arrow images, rotate them in an external program, then copy them back in. So I put some buttons next to the arrow image wells that allow the user to rotate the arrows within Slider itself.

Tile an NSImage Within an NSBezierPath Another snippet I had to write during the great Slider...
Fill a Path With A Scaled Image, Ignoring Image Proportions While continuing to rebuild Slider’s background image features, I was...
The Mutations of Slider’s Tab Option Pane During the past week, I’ve been working on Slider’s new...

Drag and Drop Reordering of NSTableView’s Rows

Michael Robinson — Tue, 08 Dec 2009 13:47:59 +0000

I just had to re-implement drag-and-drop-reordering of Slider cells. I was lucky enough to find my post on the Cocoa-dev list – I just had to copy-paste the code. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 [...]

Extracting hex value from NSColor Example project available on GitHub – CINSColor+Hex This category on...
Detecting Presence of a Framework Within an NSBundle (Plugin) Introduction Jump to Tutorial In light of Cocoa Warning: Implicitly...
Free AJAX Loading GIF Generator Using the Ajaxinfo GIF generator, one may choose the colour,...

How to Prevent Noisy NSBitmapImageReps

Michael Robinson — Tue, 10 Nov 2009 01:00:34 +0000

Images generated for Slider’s background and tabs contained a lot of noise – random ugly pixels throughout the images. I was unsure why this was happening, so I asked the Cocoa-Dev mailing list. Rob Keniger kindly replied with the following solution: “An NSBitmapImageRep is not guaranteed to be empty when you create it and in [...]

Tile an NSImage Within an NSBezierPath Another snippet I had to write during the great Slider...
Fill a Path With A Scaled Image, Ignoring Image Proportions While continuing to rebuild Slider’s background image features, I was...
Rotate NSImage in an NSImageView As soon as I implemented this I realised how much...