Ordered NSDictionary

Just a no nonscense way of arranging a dictionary based on an ordered set of keys. Remember in Cocoa arranged means ordered.

Use it like this:

NSArray *arrangedValues = [myDictionary arrangedValuesWithArrangedKeys:myOrderedArrayOfKeys];

Here's the category:

@interface NSDictionary (Ordering)
- (NSArray *)arrangedValuesWithArrangedKeys:(NSArray *)orderedKeys;
@end

@implementation NSDictionary (Ordering)

- (NSArray *)arrangedValuesWithArrangedKeys:(NSArray *)orderedKeys
{
NSMutableArray *orderedArrayOfValues = [[[NSMutableArray alloc] init] autorelease];
for (id key in orderedKeys) {
[orderedArrayOfValues addObject:[self objectForKey:key]];
}
return [NSArray arrayWithArray:orderedArrayOfValues];
}

@end

Occam's Razor

My mind is growing fonder of Occam's razor, and I endeavor to chase that ideal in my software.

Plurality ought never be posited without necessity.

PQMousing

I've reused this code in all the custom views I've written lately, and it usually just works by plugging it in, so I thought it warranted posting.

I used to hate writing all that awful mouse event code, and once I'd done it, mouseDown: would end up being this page long affair full of if's else's, and ugly key press masks. You know the story. This code reduces mouseDown: to one line of code:

[self dispatchCorrectMousingActionForEvent:event toObject:self];

This will then proceed to fire at your Object the following methods, and it's up to you which ones you want to implement.

- (void)mouseDraggingStarted:(NSEvent *)event;
- (void)doubleClick:(NSEvent *)event;
- (void)basicMouseDown:(NSEvent *)event;
- (void)shiftMouseUp:(NSEvent *)event;
- (void)shiftMouseDown:(NSEvent *)event;
- (void)willDrag:(NSEvent *)event;
- (void)basicMouseUp:(NSEvent *)event;

I could add others of course, but these have gotten me by so far. If you have any additions, email me or add them to the comments!

//
// PQMousing.h
//
// Created by Mathieu Tozer on 13/07/07.
//

#import Cocoa/Cocoa.h //put inside angled brackets!

@interface NSObject (PQMousing)

- (void)dispatchCorrectMousingActionForEvent:(NSEvent *)event toObject:(id)object;

- (void)mouseDraggingStarted:(NSEvent *)event;
- (void)doubleClick:(NSEvent *)event;
- (void)basicMouseDown:(NSEvent *)event;
- (void)shiftMouseUp:(NSEvent *)event;
- (void)shiftMouseDown:(NSEvent *)event;
- (void)willDrag:(NSEvent *)event;
- (void)basicMouseUp:(NSEvent *)event;

@end

//
// PQMousing.m
//
// Created by Mathieu Tozer on 13/07/07.
//

#import "PQMousing.h"

const NSTimeInterval kTimeToWaitForDrag = .1;
@implementation NSObject (PQMousing)

- (void)dispatchCorrectMousingActionForEvent:(NSEvent *)event toObject:(id)object
{
//have a look for double click actions
if ([event clickCount] == 2) {
if ([object respondsToSelector:@selector(doubleClick:)]) {
[object doubleClick:event];
return;
}
}

NSEvent *nextEvent;
BOOL extending = (([event modifierFlags] & NSShiftKeyMask) ? YES : NO);
if (extending) {
if ([object respondsToSelector:@selector(shiftMouseDown:)]) [object shiftMouseDown:event];
} else {
if ([object respondsToSelector:@selector(basicMouseDown:)]) [object basicMouseDown:event];
}

//now wait for a possible drag or for a release
while (nextEvent = [NSApp nextEventMatchingMask:(NSLeftMouseDraggedMask || NSLeftMouseUpMask) untilDate:[NSDate distantFuture] inMode:NSEventTrackingRunLoopMode dequeue:YES]) {
if ([nextEvent type] == NSLeftMouseDragged) {
if ([object respondsToSelector:@selector(mouseDraggingStarted:)]) {
if ([object respondsToSelector:@selector(willDrag:)]) [object willDrag:event];
if ([object respondsToSelector:@selector(mouseDraggingStarted:)]) [object mouseDraggingStarted:event];
}
break;
} else if ([nextEvent type] == NSLeftMouseUp) {
if (extending) {
if ([object respondsToSelector:@selector(shiftMouseUp:)]) [object shiftMouseUp:event];
} else {
if ([object respondsToSelector:@selector(basicMouseUp:)]) [object basicMouseUp:event];
}
break;
}
}
}


//subclasses may implement these
- (void)mouseDraggingStarted:(NSEvent *)event
{

}
- (void)doubleClick:(NSEvent *)event
{

}
- (void)basicMouseDown:(NSEvent *)event
{

}
- (void)shiftMouseUp:(NSEvent *)event
{

}
- (void)shiftMouseDown:(NSEvent *)event
{

}
- (void)willDrag:(NSEvent *)event
{

}
- (void)basicMouseUp:(NSEvent *)event
{

}

@end

New code blog!

Code and software? We'll see

Mwahahaha yes we'll see about that!!!