git.sesse.net Git - vlc/blob - modules/gui/macosx/fspanel.m

   1 /*****************************************************************************
   2  * fspanel.m: MacOS X full screen panel
   3  *****************************************************************************
   4  * Copyright (C) 2006-2008 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Jérôme Decoodt <djc at videolan dot org>
   8  *          Felix Paul Kühne <fkuehne at videolan dot org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #import "intf.h"
  29 #import "controls.h"
  30 #import "vout.h"
  31 #import "misc.h"
  32 #import "fspanel.h"
  33
  34 /*****************************************************************************
  35  * VLCFSPanel
  36  *****************************************************************************/
  37 @implementation VLCFSPanel
  38 /* We override this initializer so we can set the NSBorderlessWindowMask styleMask, and set a few other important settings */
  39 - (id)initWithContentRect:(NSRect)contentRect
  40                 styleMask:(unsigned int)aStyle
  41                   backing:(NSBackingStoreType)bufferingType
  42                     defer:(BOOL)flag
  43 {
  44     id win = [super initWithContentRect:contentRect styleMask:NSTexturedBackgroundWindowMask backing:bufferingType defer:flag];
  45     [win setOpaque:NO];
  46     [win setHasShadow: NO];
  47     [win setBackgroundColor:[NSColor clearColor]];
  48
  49     /* let the window sit on top of everything else and start out completely transparent */
  50     [win setLevel:NSModalPanelWindowLevel];
  51     i_device = 0;
  52     [win center];
  53     hideAgainTimer = fadeTimer = nil;
  54     [self setNonActive:nil];
  55     return win;
  56 }
  57
  58 - (void)awakeFromNib
  59 {
  60     [self setContentView:[[VLCFSPanelView alloc] initWithFrame: [self frame]]];
  61     BOOL isInside = (NSPointInRect([NSEvent mouseLocation],[self frame]));
  62     [[self contentView] addTrackingRect:[[self contentView] bounds] owner:self userData:nil assumeInside:isInside];
  63     if (isInside)
  64         [self mouseEntered:NULL];
  65     if (!isInside)
  66         [self mouseExited:NULL];
  67
  68     /* get a notification if VLC isn't the active app anymore */
  69     [[NSNotificationCenter defaultCenter]
  70     addObserver: self
  71        selector: @selector(setNonActive:)
  72            name: NSApplicationDidResignActiveNotification
  73          object: NSApp];
  74
  75     /* get a notification if VLC is the active app again */
  76     [[NSNotificationCenter defaultCenter]
  77     addObserver: self
  78        selector: @selector(setActive:)
  79            name: NSApplicationDidBecomeActiveNotification
  80          object: NSApp];
  81 }
  82
  83 /* Windows created with NSBorderlessWindowMask normally can't be key, but we want ours to be */
  84 - (BOOL)canBecomeKeyWindow
  85 {
  86     return YES;
  87 }
  88
  89 - (BOOL)mouseDownCanMoveWindow
  90 {
  91     return YES;
  92 }
  93
  94 -(void)dealloc
  95 {
  96     [[NSNotificationCenter defaultCenter] removeObserver: self];
  97
  98     if( hideAgainTimer )
  99     {
 100         [hideAgainTimer invalidate];
 101         [hideAgainTimer release];
 102     }
 103     [self setFadeTimer:nil];
 104     [super dealloc];
 105 }
 106
 107 -(void)center
 108 {
 109     /* centre the panel in the lower third of the screen */
 110     NSPoint theCoordinate;
 111     NSRect theScreensFrame;
 112     NSRect theWindowsFrame;
 113     NSScreen *screen;
 114
 115     /* user-defined screen */
 116     screen = [NSScreen screenWithDisplayID: (CGDirectDisplayID)i_device];
 117
 118     if (!screen)
 119     {
 120         /* invalid preferences or none specified, using main screen */
 121         screen = [NSScreen mainScreen];
 122     }
 123
 124     theScreensFrame = [screen frame];
 125
 126     theWindowsFrame = [self frame];
 127
 128     theCoordinate.x = (theScreensFrame.size.width - theWindowsFrame.size.width) / 2 + theScreensFrame.origin.x;
 129     theCoordinate.y = (theScreensFrame.size.height / 3) - theWindowsFrame.size.height + theScreensFrame.origin.y;
 130     [self setFrameTopLeftPoint: theCoordinate];
 131 }
 132
 133 - (void)setPlay
 134 {
 135     [[self contentView] setPlay];
 136 }
 137
 138 - (void)setPause
 139 {
 140     [[self contentView] setPause];
 141 }
 142
 143 - (void)setStreamTitle:(NSString *)o_title
 144 {
 145     [[self contentView] setStreamTitle: o_title];
 146 }
 147
 148 - (void)setStreamPos:(float) f_pos andTime:(NSString *)o_time
 149 {
 150     [[self contentView] setStreamPos:f_pos andTime: o_time];
 151 }
 152
 153 - (void)setSeekable:(BOOL) b_seekable
 154 {
 155     [[self contentView] setSeekable: b_seekable];
 156 }
 157
 158 - (void)setVolumeLevel: (float)f_volumeLevel
 159 {
 160     [[self contentView] setVolumeLevel: f_volumeLevel];
 161 }
 162
 163 - (void)setNonActive:(id)noData
 164 {
 165     b_nonActive = YES;
 166     [self orderOut: self];
 167
 168     /* here's fadeOut, just without visibly fading */
 169     b_displayed = NO;
 170     [self setAlphaValue:0.0];
 171     [self setFadeTimer:nil];
 172     b_fadeQueued = NO;
 173 }
 174
 175 - (void)setActive:(id)noData
 176 {
 177     if( [[[[VLCMain sharedInstance] getControls] getVoutView] isFullscreen] )
 178     {
 179         b_nonActive = NO;
 180         [self fadeIn];
 181     }
 182 }
 183
 184 /* This routine is called repeatedly to fade in the window */
 185 - (void)focus:(NSTimer *)timer
 186 {
 187     /* we need to push ourselves to front if the vout window was closed since our last display */
 188     if( b_voutWasUpdated )
 189     {
 190         [self orderFront: self];
 191         b_voutWasUpdated = NO;
 192     }
 193
 194     if( [self alphaValue] < 1.0 )
 195         [self setAlphaValue:[self alphaValue]+0.1];
 196     if( [self alphaValue] >= 1.0 )
 197     {
 198         b_displayed = YES;
 199         [self setAlphaValue: 1.0];
 200         [self setFadeTimer:nil];
 201         if( b_fadeQueued )
 202         {
 203             b_fadeQueued=NO;
 204             [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(unfocus:) userInfo:NULL repeats:YES]];
 205         }
 206     }
 207 }
 208
 209 /* This routine is called repeatedly to hide the window */
 210 - (void)unfocus:(NSTimer *)timer
 211 {
 212     if( b_keptVisible )
 213     {
 214         b_keptVisible = NO;
 215         b_fadeQueued = NO;
 216         [self setFadeTimer: NULL];
 217         [self fadeIn];
 218         return;
 219     }
 220     if( [self alphaValue] > 0.0 )
 221         [self setAlphaValue:[self alphaValue]-0.05];
 222     if( [self alphaValue] <= 0.05 )
 223     {
 224         b_displayed = NO;
 225         [self setAlphaValue:0.0];
 226         [self setFadeTimer:nil];
 227         if( b_fadeQueued )
 228         {
 229             b_fadeQueued=NO;
 230             [self setFadeTimer:
 231                 [NSTimer scheduledTimerWithTimeInterval:0.1
 232                                                  target:self
 233                                                selector:@selector(focus:)
 234                                                userInfo:NULL
 235                                                 repeats:YES]];
 236         }
 237     }
 238 }
 239
 240 - (void)mouseExited:(NSEvent *)theEvent
 241 {
 242     /* give up our focus, so the vout may show us again without letting the user clicking it */
 243     if( [[[[VLCMain sharedInstance] getControls] getVoutView] isFullscreen] )
 244         [[[[[VLCMain sharedInstance] getControls] getVoutView] window] makeKeyWindow];
 245 }
 246
 247 - (void)fadeIn
 248 {
 249     /* in case that the user don't want us to appear, just return here */
 250     if(! config_GetInt( VLCIntf, "macosx-fspanel" ) || b_nonActive )
 251         return;
 252
 253     [self orderFront: nil];
 254
 255     if( [self alphaValue] < 1.0 || b_displayed != YES )
 256     {
 257         if (![self fadeTimer])
 258             [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(focus:) userInfo:[NSNumber numberWithShort:1] repeats:YES]];
 259         else if ([[[self fadeTimer] userInfo] shortValue]==0)
 260             b_fadeQueued=YES;
 261     }
 262     [self autoHide];
 263 }
 264
 265 - (void)fadeOut
 266 {
 267     if( NSPointInRect([NSEvent mouseLocation],[self frame]))
 268         return;
 269
 270     if( ( [self alphaValue] > 0.0 ) )
 271     {
 272         if (![self fadeTimer])
 273             [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(unfocus:) userInfo:[NSNumber numberWithShort:0] repeats:YES]];
 274         else if ([[[self fadeTimer] userInfo] shortValue]==1)
 275             b_fadeQueued=YES;
 276     }
 277 }
 278
 279 /* triggers a timer to autoHide us again after some seconds of no activity */
 280 - (void)autoHide
 281 {
 282     /* this will tell the timer to start over again or to start at all */
 283     b_keptVisible = YES;
 284
 285     /* get us a valid timer */
 286     if(! b_alreadyCounting )
 287     {
 288         i_timeToKeepVisibleInSec = var_CreateGetInteger( VLCIntf, "mouse-hide-timeout" ) / 500;
 289         if( hideAgainTimer )
 290         {
 291             [hideAgainTimer invalidate];
 292             [hideAgainTimer autorelease];
 293         }
 294         /* released in -autoHide and -dealloc */
 295         hideAgainTimer = [[NSTimer scheduledTimerWithTimeInterval: 0.5
 296                                                           target: self
 297                                                         selector: @selector(keepVisible:)
 298                                                         userInfo: nil
 299                                                          repeats: YES] retain];
 300         b_alreadyCounting = YES;
 301     }
 302 }
 303
 304 - (void)keepVisible:(NSTimer *)timer
 305 {
 306     /* if the user triggered an action, start over again */
 307     if( b_keptVisible )
 308         b_keptVisible = NO;
 309
 310     /* count down until we hide ourselfes again and do so if necessary */
 311     if( --i_timeToKeepVisibleInSec < 1 )
 312     {
 313         [NSCursor setHiddenUntilMouseMoves: YES];
 314         [self fadeOut];
 315         [hideAgainTimer invalidate]; /* released in -autoHide and -dealloc */
 316         b_alreadyCounting = NO;
 317     }
 318 }
 319
 320 /* A getter and setter for our main timer that handles window fading */
 321 - (NSTimer *)fadeTimer
 322 {
 323     return fadeTimer;
 324 }
 325
 326 - (void)setFadeTimer:(NSTimer *)timer
 327 {
 328     [timer retain];
 329     [fadeTimer invalidate];
 330     [fadeTimer autorelease];
 331     fadeTimer=timer;
 332 }
 333
 334 - (void)mouseDown:(NSEvent *)theEvent
 335 {
 336     mouseClic = [theEvent locationInWindow];
 337 }
 338
 339 - (void)mouseDragged:(NSEvent *)theEvent
 340 {
 341     NSPoint point = [NSEvent mouseLocation];
 342     point.x -= mouseClic.x;
 343     point.y -= mouseClic.y;
 344     [self setFrameOrigin:point];
 345 }
 346
 347 - (BOOL)isDisplayed
 348 {
 349     return b_displayed;
 350 }
 351
 352 - (void)setVoutWasUpdated: (int)i_newdevice;
 353 {
 354     b_voutWasUpdated = YES;
 355     if( i_newdevice != i_device )
 356     {
 357         i_device = i_newdevice;
 358         [self center];
 359     }
 360 }
 361 @end
 362
 363 /*****************************************************************************
 364  * FSPanelView
 365  *****************************************************************************/
 366 @implementation VLCFSPanelView
 367
 368 #define addButton( o_button, imageOff, imageOn, _x, _y, action )                                \
 369     s_rc.origin.x = _x;                                                                         \
 370     s_rc.origin.y = _y;                                                                         \
 371     o_button = [[NSButton alloc] initWithFrame: s_rc];                                 \
 372     [o_button setButtonType: NSMomentaryChangeButton];                                          \
 373     [o_button setBezelStyle: NSRegularSquareBezelStyle];                                        \
 374     [o_button setBordered: NO];                                                                 \
 375     [o_button setFont:[NSFont systemFontOfSize:0]];                                             \
 376     [o_button setImage:[NSImage imageNamed:imageOff]];                                 \
 377     [o_button setAlternateImage:[NSImage imageNamed:imageOn]];                         \
 378     [o_button sizeToFit];                                                                       \
 379     [o_button setTarget: self];                                                                 \
 380     [o_button setAction: @selector(action:)];                                                   \
 381     [self addSubview:o_button];
 382
 383 #define addTextfield( o_text, align, font, color, size )                                    \
 384     o_text = [[NSTextField alloc] initWithFrame: s_rc];                            \
 385     [o_text setDrawsBackground: NO];                                                        \
 386     [o_text setBordered: NO];                                                               \
 387     [o_text setEditable: NO];                                                               \
 388     [o_text setSelectable: NO];                                                             \
 389     [o_text setStringValue: _NS("(no item is being played)")];                                                    \
 390     [o_text setAlignment: align];                                                           \
 391     [o_text setTextColor: [NSColor color]];                                                 \
 392     [o_text setFont:[NSFont font:[NSFont smallSystemFontSize] - size]];                     \
 393     [self addSubview:o_text];
 394
 395 - (id)initWithFrame:(NSRect)frameRect
 396 {
 397     id view = [super initWithFrame:frameRect];
 398     fillColor = [[NSColor clearColor] retain];
 399     NSRect s_rc = [self frame];
 400     addButton( o_prev, @"fs_skip_previous" , @"fs_skip_previous_highlight", 174, 15, prev );
 401     addButton( o_bwd, @"fs_rewind"        , @"fs_rewind_highlight"       , 211, 14, backward );
 402     addButton( o_play, @"fs_play"          , @"fs_play_highlight"         , 267, 10, play );
 403     addButton( o_fwd, @"fs_forward"       , @"fs_forward_highlight"      , 313, 14, forward );
 404     addButton( o_next, @"fs_skip_next"     , @"fs_skip_next_highlight"    , 365, 15, next );
 405     addButton( o_fullscreen, @"fs_exit_fullscreen", @"fs_exit_fullscreen_hightlight", 507, 13, windowAction );
 406 /*
 407     addButton( o_button, @"image (off state)", @"image (on state)", 38, 51, something );
 408  */
 409
 410     /* time slider */
 411     s_rc = [self frame];
 412     s_rc.origin.x = 15;
 413     s_rc.origin.y = 53;
 414     s_rc.size.width = 518;
 415     s_rc.size.height = 9;
 416     o_fs_timeSlider = [[VLCFSTimeSlider alloc] initWithFrame: s_rc];
 417     [o_fs_timeSlider setMinValue:0];
 418     [o_fs_timeSlider setMaxValue:10000];
 419     [o_fs_timeSlider setFloatValue: 0];
 420     [o_fs_timeSlider setContinuous: YES];
 421     [o_fs_timeSlider setTarget: self];
 422     [o_fs_timeSlider setAction: @selector(fsTimeSliderUpdate:)];
 423     [self addSubview: o_fs_timeSlider];
 424
 425     /* volume slider */
 426     s_rc = [self frame];
 427     s_rc.origin.x = 26;
 428     s_rc.origin.y = 17.5;
 429     s_rc.size.width = 95;
 430     s_rc.size.height = 10;
 431     o_fs_volumeSlider = [[VLCFSVolumeSlider alloc] initWithFrame: s_rc];
 432     [o_fs_volumeSlider setMinValue:0];
 433     [o_fs_volumeSlider setMaxValue:32];
 434     [o_fs_volumeSlider setFloatValue: 0];
 435     [o_fs_volumeSlider setContinuous: YES];
 436     [o_fs_volumeSlider setTarget: self];
 437     [o_fs_volumeSlider setAction: @selector(fsVolumeSliderUpdate:)];
 438     [self addSubview: o_fs_volumeSlider];
 439
 440     /* time counter and stream title output fields */
 441     s_rc = [self frame];
 442     s_rc.origin.x = 98;
 443     s_rc.origin.y = 64;
 444     s_rc.size.width = 352;
 445     s_rc.size.height = 14;
 446     addTextfield( o_streamTitle_txt, NSCenterTextAlignment, systemFontOfSize, whiteColor, 0 );
 447     s_rc.origin.x = 486;
 448     s_rc.origin.y = 64;
 449     s_rc.size.width = 50;
 450     addTextfield( o_streamPosition_txt, NSRightTextAlignment, systemFontOfSize, whiteColor, 0 );
 451
 452     return view;
 453 }
 454
 455 - (void)dealloc
 456 {
 457     [o_fs_timeSlider release];
 458     [o_fs_volumeSlider release];
 459     [o_prev release];
 460     [o_next release];
 461     [o_bwd release];
 462     [o_play release];
 463     [o_fwd release];
 464     [o_fullscreen release];
 465     [o_streamTitle_txt release];
 466     [o_streamPosition_txt release];
 467     [super dealloc];
 468 }
 469
 470 - (void)setPlay
 471 {
 472     [o_play setImage:[NSImage imageNamed:@"fs_play"]];
 473     [o_play setAlternateImage: [NSImage imageNamed:@"fs_play_highlight"]];
 474 }
 475
 476 - (void)setPause
 477 {
 478     [o_play setImage: [NSImage imageNamed:@"fs_pause"]];
 479     [o_play setAlternateImage: [NSImage imageNamed:@"fs_pause_highlight"]];
 480 }
 481
 482 - (void)setStreamTitle:(NSString *)o_title
 483 {
 484     [o_streamTitle_txt setStringValue: o_title];
 485 }
 486
 487 - (void)setStreamPos:(float) f_pos andTime:(NSString *)o_time
 488 {
 489     [o_streamPosition_txt setStringValue: o_time];
 490     [o_fs_timeSlider setFloatValue: f_pos];
 491 }
 492
 493 - (void)setSeekable:(BOOL)b_seekable
 494 {
 495     [o_bwd setEnabled: b_seekable];
 496     [o_fwd setEnabled: b_seekable];
 497     [o_fs_timeSlider setEnabled: b_seekable];
 498 }
 499
 500 - (void)setVolumeLevel: (float)f_volumeLevel
 501 {
 502     [o_fs_volumeSlider setFloatValue: f_volumeLevel];
 503 }
 504
 505 - (IBAction)play:(id)sender
 506 {
 507     [[[VLCMain sharedInstance] getControls] play: sender];
 508 }
 509
 510 - (IBAction)forward:(id)sender
 511 {
 512     [[[VLCMain sharedInstance] getControls] forward: sender];
 513 }
 514
 515 - (IBAction)backward:(id)sender
 516 {
 517     [[[VLCMain sharedInstance] getControls] backward: sender];
 518 }
 519
 520 - (IBAction)prev:(id)sender
 521 {
 522     [[[VLCMain sharedInstance] getControls] prev: sender];
 523 }
 524
 525 - (IBAction)next:(id)sender
 526 {
 527     [[[VLCMain sharedInstance] getControls] next: sender];
 528 }
 529
 530 - (IBAction)windowAction:(id)sender
 531 {
 532     [[[VLCMain sharedInstance] getControls] windowAction: sender];
 533 }
 534
 535 - (IBAction)fsTimeSliderUpdate:(id)sender
 536 {
 537     [[VLCMain sharedInstance] timesliderUpdate: sender];
 538 }
 539
 540 - (IBAction)fsVolumeSliderUpdate:(id)sender
 541 {
 542     [[[VLCMain sharedInstance] getControls] volumeSliderUpdated: sender];
 543 }
 544
 545 #define addImage(image, _x, _y, mode, _width)                                               \
 546     img = [NSImage imageNamed:image];                                              \
 547     image_rect.size = [img size];                                                           \
 548     image_rect.origin.x = 0;                                                                \
 549     image_rect.origin.y = 0;                                                                \
 550     frame.origin.x = _x;                                                                    \
 551     frame.origin.y = _y;                                                                    \
 552     frame.size = [img size];                                                                \
 553     if( _width ) frame.size.width = _width;                                                 \
 554     [img drawInRect:frame fromRect:image_rect operation:mode fraction:1];
 555
 556 - (void)drawRect:(NSRect)rect
 557 {
 558     NSRect frame = [self frame];
 559     NSRect image_rect;
 560     NSImage *img;
 561     addImage( @"fs_background", 0, 0, NSCompositeCopy, 0 );
 562     addImage( @"fs_volume_slider_bar", 26, 22, NSCompositeSourceOver, 0 );
 563     addImage( @"fs_volume_mute", 16, 18, NSCompositeSourceOver, 0 );
 564     addImage( @"fs_volume_max", 124, 17, NSCompositeSourceOver, 0 );
 565     addImage( @"fs_time_slider", 15, 53, NSCompositeSourceOver, 0);
 566 }
 567
 568 @end
 569
 570 /*****************************************************************************
 571  * VLCFSTimeSlider
 572  *****************************************************************************/
 573 @implementation VLCFSTimeSlider
 574 - (void)drawKnobInRect:(NSRect)knobRect
 575 {
 576     NSRect image_rect;
 577     NSImage *img = [NSImage imageNamed:@"fs_time_slider_knob_highlight"];
 578     image_rect.size = [img size];
 579     image_rect.origin.x = 0;
 580     image_rect.origin.y = 0;
 581     knobRect.origin.x += (knobRect.size.width - image_rect.size.width) / 2;
 582     knobRect.size.width = image_rect.size.width;
 583     knobRect.size.height = image_rect.size.height;
 584     [img drawInRect:knobRect fromRect:image_rect operation:NSCompositeSourceOver fraction:1];
 585 }
 586
 587 - (void)drawRect:(NSRect)rect
 588 {
 589     /* Draw default to make sure the slider behaves correctly */
 590     [[NSGraphicsContext currentContext] saveGraphicsState];
 591     NSRectClip(NSZeroRect);
 592     [super drawRect:rect];
 593     [[NSGraphicsContext currentContext] restoreGraphicsState];
 594
 595     NSRect knobRect = [[self cell] knobRectFlipped:NO];
 596     knobRect.origin.y+=7.5;
 597     [[[NSColor blackColor] colorWithAlphaComponent:0.6] set];
 598     [self drawKnobInRect: knobRect];
 599 }
 600
 601 @end
 602
 603 /*****************************************************************************
 604 * VLCFSVolumeSlider
 605 *****************************************************************************/
 606 @implementation VLCFSVolumeSlider
 607 - (void)drawKnobInRect:(NSRect) knobRect
 608 {
 609     NSRect image_rect;
 610     NSImage *img = [NSImage imageNamed:@"fs_volume_slider_knob"];
 611     image_rect.size = [img size];
 612     image_rect.origin.x = 0;
 613     image_rect.origin.y = 0;
 614     knobRect.origin.x += (knobRect.size.width - image_rect.size.width) / 2;
 615     knobRect.size.width = image_rect.size.width;
 616     knobRect.size.height = image_rect.size.height;
 617     [img drawInRect:knobRect fromRect:image_rect operation:NSCompositeSourceOver fraction:1];
 618 }
 619
 620 - (void)drawRect:(NSRect)rect
 621 {
 622     /* Draw default to make sure the slider behaves correctly */
 623     [[NSGraphicsContext currentContext] saveGraphicsState];
 624     NSRectClip(NSZeroRect);
 625     [super drawRect:rect];
 626     [[NSGraphicsContext currentContext] restoreGraphicsState];
 627
 628     NSRect knobRect = [[self cell] knobRectFlipped:NO];
 629     knobRect.origin.y+=6;
 630     [[[NSColor blackColor] colorWithAlphaComponent:0.6] set];
 631     [self drawKnobInRect: knobRect];
 632 }
 633
 634 @end
 635