NSTextField Edit in Place

/**   delegate **/
#import <Foundation/Foundation.h>
@class GWTitleField;
@protocol GWTitleEditingDelegate <NSObject>
- (void) titleFieldBeginEditing:(GWTitleField *) titleField;
- (void) titleFieldCommitEditing:(GWTitleField *) titleField;
- (void) titleFieldDiscardEditing:(GWTitleField *) titleField;
@end

/** title editor field header **/
#import <Cocoa/Cocoa.h>
#import "GWTitleField.h"
#import "GWTitleEditingDelegate.h"
@interface GWTitleEditorField : NSTextField
@property (assign) GWTitleField * titleField;
@property (assign) NSObject <GWTitleEditingDelegate> * editDelegate;
- (void) beginEditing;
- (void) cancelEditing;
@end

/** title editor field impl **/

#import "GWTitleEditorField.h"
@implementation GWTitleEditorField
- (void) beginEditing {
    [self selectText:nil];
    [self becomeFirstResponder];
}
- (void) cancelEditing {
    if(!self.titleField) {
        return;
    }
    [self.titleField discardEditsFromEditorField:self];
}
- (void) keyUp:(NSEvent *) theEvent {
    if(self.editDelegate) {
        if(theEvent.keyCode == 36 || theEvent.keyCode == 48) { //enter || tab
            if([self.editDelegate respondsToSelector:@selector(titleFieldCommitEditing:)]) {
                [self.editDelegate titleFieldCommitEditing:self.titleField];
            }
        }
        if(theEvent.keyCode == 53) { //escape
            if([self.editDelegate respondsToSelector:@selector(titleFieldDiscardEditing:)]) {
                [self.editDelegate titleFieldDiscardEditing:self.titleField];
            }
        }
    }
}
@end

/** title field header **/

#import <Cocoa/Cocoa.h>
#import "GWTitleEditorField.h"
#import "GWTitleEditingDelegate.h"

@class GWTitleEditorField;
@interface GWTitleField : NSTextField {
    NSTimer * _editTimeout;
}
@property BOOL editInPlace;
@property BOOL singleClickDelayedEdit;
@property NSTimeInterval singleClickDelay;
@property (assign) NSObject <GWTitleEditingDelegate> * editDelegate;
- (void) editWithEditorField:(GWTitleEditorField *) editorField;
- (void) commitEditsFromEditorField:(GWTitleEditorField *) editorField;
- (void) discardEditsFromEditorField:(GWTitleEditorField *) editorField;
@end

/** title field impl **/

#import "GWTitleField.h"

@implementation GWTitleField

- (id) initWithCoder:(NSCoder *)aDecoder {
    self = [super initWithCoder:aDecoder];
    self.singleClickDelay = .8;
    self.singleClickDelayedEdit = TRUE;
    return self;
}

- (id) initWithFrame:(NSRect)frameRect {
    self = [super initWithFrame:frameRect];
    self.singleClickDelay = .8;
    self.singleClickDelayedEdit = FALSE;
    return self;
}

- (void) mouseUp:(NSEvent *) theEvent {
    if(!self.editInPlace) {
        return;
    }
    if(_editTimeout) {
        [_editTimeout invalidate];
        _editTimeout = nil;
    }
    if(theEvent.clickCount > 1) {
            [NSTimer scheduledTimerWithTimeInterval:0 target:self selector:@selector(_edit:) userInfo:nil repeats:FALSE];
            return;
    }
    if(self.singleClickDelayedEdit) {
        _editTimeout = [NSTimer scheduledTimerWithTimeInterval:self.singleClickDelay target:self selector:@selector(_edit:) userInfo:nil repeats:false];
    }
}

- (void) editWithEditorField:(GWTitleEditorField *) editorField {
    if(!self.superview) {
        return;
    }
    if(editorField.titleField) {
        [editorField.titleField commitEditsFromEditorField:editorField];
    }
    editorField.titleField = self;
    [editorField setStringValue:self.stringValue];
    NSRect sf = self.frame;
    editorField.frame = sf;
    [self.superview addSubview:editorField];
    [editorField beginEditing];
    [self setHidden:TRUE];
}

- (void) commitEditsFromEditorField:(GWTitleEditorField *) editorField {
    editorField.titleField = nil;
    [self setStringValue:editorField.stringValue];
    [self setHidden:NO];
    [editorField removeFromSuperview];
}

- (void) discardEditsFromEditorField:(GWTitleEditorField *) editorField {
    editorField.titleField = nil;
    [self setHidden:NO];
    [editorField removeFromSuperview];
}

- (void) _edit:(NSTimer *) sender {
    if(self.editDelegate) {
        if([self.editDelegate respondsToSelector:@selector(titleFieldBeginEditing:)]) {
            [self.editDelegate titleFieldBeginEditing:self];
        }
    }
}

@end