root/trunk/Views/JVColorWellCell.m

#import "JVColorWellCell.h"

static NSMutableSet *colorWellCells = nil;

NSString *JVColorWellCellColorDidChangeNotification = @"JVColorWellCellColorDidChangeNotification";

@implementation JVColorWellCell
+ (void) colorPanelColorChanged:(NSNotification *) notification {
        NSColorPanel *panel = [notification object];
        NSEnumerator *enumerator = [colorWellCells objectEnumerator];
        JVColorWellCell *cell = nil;

        while( ( cell = [enumerator nextObject] ) ) {
                if( [cell isActive] ) {
                        [cell setColor:[panel color]];
                        [[NSNotificationCenter defaultCenter] postNotificationName:JVColorWellCellColorDidChangeNotification object:cell userInfo:nil];
                }
        }
}

+ (void) colorPanelClosed:(NSNotification *) notification {
        NSEnumerator *enumerator = [colorWellCells objectEnumerator];
        JVColorWellCell *cell = nil;

        while( ( cell = [enumerator nextObject] ) )
                if( [cell isActive] ) [cell deactivate];
}

+ (void) initialize {
        [super initialize];
        static BOOL tooLate = NO;
        if( ! tooLate ) {
                [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector( colorPanelColorChanged: ) name:NSColorPanelColorDidChangeNotification object:nil];
                tooLate = YES;
        }
}

#pragma mark -

- (id) initTextCell:(NSString *) string {
        return ( self = [self initImageCell:nil] );
}

- (id) initImageCell:(NSImage *) image {
        static BOOL observingClose = NO;
        if( ! observingClose ) {
                [[NSNotificationCenter defaultCenter] addObserver:[self class] selector:@selector( colorPanelClosed: ) name:NSWindowWillCloseNotification object:[NSColorPanel sharedColorPanel]];
                observingClose = YES;
        }

        if( ( self = [super initImageCell:nil] ) ) {
                if( ! colorWellCells ) colorWellCells = [[NSMutableSet set] retain];
                [colorWellCells addObject:self];
                _releasing = NO;

                [self setShowsWebValue:YES];
                [self setEditable:YES];
                [self setColor:[NSColor whiteColor]];
                [self setBezelStyle:NSShadowlessSquareBezelStyle];
                [self setButtonType:NSOnOffButton];
                [self setImagePosition:NSImageOnly];
                [super setTarget:self];
                [super setAction:@selector( clicked: )];
                [super setTitle:@""];
                [super setAlternateTitle:@""];
                [super setImage:nil];
                [super setAlternateImage:nil];
        }

        return self;
}

- (id) copyWithZone:(NSZone *) zone {
        JVColorWellCell *ret = [super copyWithZone:zone];
        ret -> _color = [_color copyWithZone:zone];
        ret -> _showsWebValue = _showsWebValue;
        ret -> _releasing = NO;

        if( ! colorWellCells ) colorWellCells = [[NSMutableSet set] retain];
        [colorWellCells addObject:ret];

        return ret;
}

- (void) release {
        if( ! _releasing && ( [self retainCount] - 1 ) == 1 ) {
                _releasing = YES;
                [colorWellCells removeObject:self];
                if( ! [colorWellCells count] ) {
                        [colorWellCells autorelease];
                        colorWellCells = nil;
                }
        }

        [super release];
}

- (void) dealloc {
        [_color release];
        _color = nil;

        [super dealloc];
}

#pragma mark -

- (void) drawWithFrame:(NSRect) cellFrame inView:(NSView *) controlView {
        NSRect rect = NSInsetRect( cellFrame, 3., 3. );
        rect.size.width = ( rect.size.height * 1.5 );
        [super drawWithFrame:rect inView:controlView];
}

- (void) drawInteriorWithFrame:(NSRect) cellFrame inView:(NSView *) controlView {
        [super drawInteriorWithFrame:cellFrame inView:controlView];
        [_color drawSwatchInRect:NSInsetRect( cellFrame, 5., 5. )];

        if( _showsWebValue ) {
                NSString *webValue = [_color HTMLAttributeValue];
                BOOL highlighted = ( [self isHighlighted] && [[controlView window] firstResponder] == controlView && [[controlView window] isKeyWindow] && [[NSApplication sharedApplication] isActive] );
                NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:[self font], NSFontAttributeName, ( [self isEnabled] ? ( highlighted ? [NSColor alternateSelectedControlTextColor] : [NSColor controlTextColor] ) : ( highlighted ? [NSColor alternateSelectedControlTextColor] : [[NSColor controlTextColor] colorWithAlphaComponent:0.50] ) ), NSForegroundColorAttributeName, nil];
                NSSize stringSize = [webValue sizeWithAttributes:attributes];
                float y = NSMinY( cellFrame ) + ( NSHeight( cellFrame ) / 2. ) - ( stringSize.height / 2. );
                [webValue drawInRect:NSMakeRect( NSMinX( cellFrame ) + ( NSHeight( cellFrame ) * 1.5 ) + 8., y, NSMaxX( cellFrame ) - ( NSHeight( cellFrame ) * 1.5 ) - 8., stringSize.height ) withAttributes:attributes];
        }
}

- (BOOL) trackMouse:(NSEvent *) event inRect:(NSRect) cellFrame ofView:(NSView *) controlView untilMouseUp:(BOOL) flag {
        NSRect rect = NSInsetRect( cellFrame, 3., 3. );
        rect.size.width = ( rect.size.height * 1.5 );
        return [super trackMouse:event inRect:rect ofView:controlView untilMouseUp:flag];
}

#pragma mark -

- (void) deactivate {
        [super setState:NSOffState];
        [[self controlView] setNeedsDisplay:YES];
}

- (void) setState:(int) value {
// do nothing, we handle this internally
}

- (void) clicked:(id) sender {
        [super setState:(! [self state])];
        if( [self state] ) {
                BOOL exclusive = ! ( [[[NSApplication sharedApplication] currentEvent] modifierFlags] & NSAlternateKeyMask );
                [self activate:exclusive];
        }
}

- (void) activate:(BOOL) exclusive {
        if( exclusive ) {
                NSEnumerator *enumerator = [colorWellCells objectEnumerator];
                JVColorWellCell *cell = nil;

                while( ( cell = [enumerator nextObject] ) ) {
                        if( cell != self && [cell isActive] ) [cell deactivate];
                }
        }

        [[NSColorPanel sharedColorPanel] setContinuous:YES];
        [[NSColorPanel sharedColorPanel] setShowsAlpha:YES];
        [[NSColorPanel sharedColorPanel] setColor:_color];
        [[NSApplication sharedApplication] orderFrontColorPanel:nil];

        [[self controlView] setNeedsDisplay:YES];
}

- (BOOL) isActive {
        return [self state];
}

#pragma mark -

- (void) takeColorFrom:(id) sender {
        NSParameterAssert( [sender respondsToSelector:@selector( color )] );
        [self setColor:[sender performSelector:@selector( color )]];
}

- (void) setColor:(NSColor *) color {
        if( ! color || [_color isEqual:color] ) return;

        [_color autorelease];
        _color = [color retain];

        if( [self isActive] )
                [[NSColorPanel sharedColorPanel] setColor:_color];

        [[self controlView] setNeedsDisplay:YES];
}

- (NSColor *) color {
        return _color;
}

#pragma mark -

- (void) setTarget:(id) object {
        [NSException raise:NSIllegalSelectorException format:@"JVColorWellCell does not implement setTarget:"];
}

- (void) setAction:(SEL) action {
        [NSException raise:NSIllegalSelectorException format:@"JVColorWellCell does not implement setAction:"];
}

#pragma mark -

- (BOOL) hasValidObjectValue {
        return YES;
}

- (id) objectValue {
        return _color;
}

- (void) setObjectValue:(id <NSCopying>) obj {
        if( [(NSObject *)obj isKindOfClass:[NSColor class]] ) {
                [self setColor:(NSColor *)obj];
        } else if( [(NSObject *)obj isKindOfClass:[NSString class]] ) {
                [self setStringValue:(NSString *)obj];
        }
}

#pragma mark -

- (NSString *) stringValue {
        return [_color HTMLAttributeValue];
}

- (void) setStringValue:(NSString *) string {
        [self setColor:[NSColor colorWithCSSAttributeValue:string]];
}

#pragma mark -

- (void) setShowsWebValue:(BOOL) web {
        _showsWebValue = web;
}

- (BOOL) showsWebValue {
        return _showsWebValue;
}
@end