ClickTracker.m

/*
     File: ClickTracker.m
 Abstract: The Click Tracker informs the view of single and double clicks. A single click is defined as a mouse down with a clickCount less than or equal to 1. A double click is a mouse up with a clickCount equal to 2. Tip: A view can easily change its behavior in response to a click by changing the action property. The owning view must route mouseDown: and mouseUp: responder messages to this tracker.
 
  Version: 1.0
 
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 */
 
#import "ClickTracker.h"
 
 
@implementation ClickTracker
@synthesize action = _action;
@synthesize doubleAction = _doubleAction;
@synthesize location = _location;
@synthesize modifiers = _modifiers;
 
- (void)mouseDown:(NSEvent *)event {
    self.location = [self.view convertPointFromBase:[event locationInWindow]];
    if ([event clickCount] <= 1) {
        self.modifiers = [event modifierFlags];
        if (self.isEnabled && self.action) {
            [NSApp sendAction:self.action to:self.view from:self];
        }
    }
}
 
- (void)mouseUp:(NSEvent *)event {
    if ([event clickCount] == 2) {
        self.modifiers = [event modifierFlags];
        if(self.isEnabled && self.doubleAction) {
            [NSApp sendAction:self.doubleAction to:self.view from:self];
        }
    }
}
@end