Four Little Problems

Andy Lee talks about four Cocoa programming obstacles he encountered, and how resolved them.

Transcript

1. Four Little Problems Andy Lee for CocoaHeadsNYC, 2013-03-14
2. Better solutions?
3. Problem Make 3 NSMatrix controls behave as one.
4. Problem Make 3 NSMatrix controls behave as one.
5. Solution Make 3 NSMatrix controls behave as one. AKMultiRadioView delegate target Custom superview, plus delegation.
6. Solution Make 3 NSMatrix controls behave as one. AKMultiRadioView delegate doRadioAction: multiRadioViewDidMakeSelection: Your action code target
7. API Make 3 NSMatrix controls behave as one. @interface AKMultiRadioView : NSView @protocol AKMultiRadioViewDelegate
8. API Make 3 NSMatrix controls behave as one. @interface AKMultiRadioView : NSView - id <AKMultiRadioViewDelegate> delegate; - (NSInteger)selectedTag; - (BOOL)selectCellWithTag:(NSInteger)tag; - (IBAction)doRadioAction:(id)sender; @protocol AKMultiRadioViewDelegate - multiRadioViewDidMakeSelection: (AKMultiRadioView *)mrv
9. How to use Make 3 NSMatrix controls behave as one. • Set the superview class in IB. • Drop in the NSMatrix instances. • Use unique cell tags. • Connect targets and delegate. • Put action code in the delegate method.
10. Problem Set text color for disabled buttons. Apple’s colors The colors I want (Those triangles are actually characters.) (Yeah, I know the difference is subtle.)
11. Solution Set text color for disabled buttons. @interface AKButtonCell : NSButtonCell // AppKit passes in an all-gray string. // Override to change the string color. // Then call super. - (NSRect)drawTitle:(NSAttributedString *)title withFrame:(NSRect)frame inView:(NSView *)controlView;
12. How to use Set text color for disabled buttons. • Select your button’s cell in IB. • Set its class to AKButtonCell. • Set custom colors if you want.
13. Credit Set text color for disabled buttons. http://stackoverflow.com/questions/ 6370500/nsbutton-set-text-color-in- disabled-mode/10632311#10632311
14. Problem Focus rings where and when I want them. Standard focus ring bleeds. WebViews have no focus ring. I don’t like standard look.
15. Solution Focus rings where and when I want them. AKFocusView Wrap views in custom superview. AKFocusView table view web view
16. How to use Focus rings where and when I want them. • Embed any view in an AKFocusView. • No code required. • Redraws automatically as needed. • Draws focus ring as solid border. • Suppresses normal AppKit focus ring.
17. Problem Control over key view loop.
18. Problem Control over key view loop. • NSBrowser not included by default. • Views in drawers not included. • Sometimes trapped in toolbar.
19. Solution Control over key view loop. @interface AKWindow : NSWindow - (void)setTabChain:(NSArray *)views; - (BOOL)handlePossibleTabChainEvent:(NSEvent *)e; //In NSApplication subclass, override: - (void)sendEvent:(NSEvent *)anEvent;
20. Solution Control over key view loop. • I currently hack toolbar buttons in. • Should go into a separate class. • Note that [self window] may be a drawer. • Note Full Keyboard Access.
21. All code is on github: aglee/appkido
22. Demo
23. That’s all, thanks!