MyColorPicker.m

/*

    MyColorPicker.m

    Copyright © 2006, Apple Computer, Inc., all rights reserved.

*/

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*/

#import "MyColorPicker.h"

// defined control tags for each color radio button

#define kRedTag     1

#define kGreenTag   2

#define kBlueTag    3

#define kWhiteTag   4

#define kOtherTag   5

@implementation MyColorPicker

- (void)dealloc

{

    [currColor release];

    [super dealloc];

}

// the adopted protocol to return our picker icon which is displayed in the NSColorPanel

- (NSImage*)provideNewButtonImage

{

    NSImage* image;

    image = [[NSImage alloc] initWithContentsOfFile:[[NSBundle bundleForClass:[self class]] pathForResource:@"icon" ofType:@"tiff"]];

    [image setScalesWhenResized:YES];

    [image setSize:NSMakeSize(32.0,32.0)];

    return [image autorelease];

}

// provide a tooltip for our color picker icon in the NSColorPanel

- (NSString *)_buttonToolTip

{

    return @"MyColorPicker";

}

// provide a description string for our color picker

- (NSString *)description

{

    return @"MyColorPicker - A simple RGB color picker";

}

// You build your own custom color picker as a bundle by subclassing NSColorPicker and adopting the NSColorPickingCustom protocol.

// MyColorPicker is launched by adopting the NSColorPickingCustom's protocol -

//

- (NSView*)provideNewView:(BOOL)initialRequest

{

    // the param "initialRequest" is YES on the very first call, at that moment

    // you ask your NSBundle to load its nib.

    //

    if (initialRequest)

        [NSBundle loadNibNamed:@"MyColorPicker" owner:self];

    return colorPickerView;

}

// determine which picking color mode we support (used by the NSColorPanel)

- (BOOL)supportsMode:(int)mode

{

    switch (mode)

    {

        case NSColorPanelAllModesMask:  // we support all modes

            return YES;

    }

    return NO;

}

// return our current color picker mode (used by the NSColorPanel)

- (int)currentMode

{

    return NSColorPanelAllModesMask;

}

// map a specific NSColor to our radio button tags

-(int)colorToTag:(NSColor*)color

{

    int tag;

    NSString* colorSpaceName;

    colorSpaceName = [color colorSpaceName];

    if (color == [NSColor redColor])

        tag = kRedTag;

    else if (color == [NSColor greenColor])

        tag = kGreenTag;

    else if (color == [NSColor blueColor])

        tag = kBlueTag;

    else if (color == [NSColor whiteColor])

        tag = kWhiteTag;

    else if (color == [NSColor selectedControlColor])

        tag = kWhiteTag;

    else if (colorSpaceName == NSCalibratedWhiteColorSpace)

        tag = kWhiteTag;

    else if (colorSpaceName == NSCalibratedRGBColorSpace)

        tag = kOtherTag;

    else

        tag = kOtherTag;

    return tag;

}

// map a specific radio button tag to an NSColor

-(NSColor*)tagToColor:(int)tag

{

    NSColor* c;

    switch (tag)

    {

        case kRedTag:   // red

            c = [NSColor redColor];

            break;

        case kGreenTag: // green

            c = [NSColor greenColor];

            break;

        case kBlueTag:  // blue

            c = [NSColor blueColor];

            break;

        case kWhiteTag: // white

            c = [NSColor whiteColor];

            break;

        case kOtherTag: // other (default gray)

            c = [NSColor lightGrayColor];

            break;

    }

    return c;

}

// called from "colorChanged" action method to update our radio buttons

- (void)setColor:(NSColor *)color

{   

    [currColor release];

    currColor = [color retain];

    [radios selectCellWithTag: [self colorToTag: color]];   // update which radio is selected

}

// the user chose a particular color from one of the radio buttons

- (IBAction)colorChanged:(id)sender

{

    NSColor* c;

    NSCell* radioCell = [radios selectedCell];

    if (radioCell != NULL)

        c = [self tagToColor: [radioCell tag]];

    [[self colorPanel] setColor:c];

}

// the user clicked the preferences button

- (IBAction)showPrefs:(id)sender

{

    [NSApp beginSheet:colorPickerPrefs modalForWindow:[colorPickerView window] modalDelegate:self didEndSelector:@selector(sheetDidEnd:returnCode:contextInfo:) contextInfo:nil];

}

// save our preferences (if any) when the user closes the prefs dialog

- (IBAction)savePrefs:(id)sender

{

    // save any prefs you have right here...

    [NSApp endSheet:colorPickerPrefs];

}

// removes the preferences sheet when finished

- (void)sheetDidEnd:(NSWindow *)sheet returnCode:(int)returnCode contextInfo:(void*)contextInfo

{

    [sheet orderOut:self];

}

@end