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 @interface VLCFSPanel ()
  35 - (void)hideMouse;
  36 @end
  37
  38 /*****************************************************************************
  39  * VLCFSPanel
  40  *****************************************************************************/
  41 @implementation VLCFSPanel
  42 /* We override this initializer so we can set the NSBorderlessWindowMask styleMask, and set a few other important settings */
  43 - (id)initWithContentRect:(NSRect)contentRect
  44                 styleMask:(unsigned int)aStyle
  45                   backing:(NSBackingStoreType)bufferingType
  46                     defer:(BOOL)flag
  47 {
  48     id win = [super initWithContentRect:contentRect styleMask:NSTexturedBackgroundWindowMask backing:bufferingType defer:flag];
  49     [win setOpaque:NO];
  50     [win setHasShadow: NO];
  51     [win setBackgroundColor:[NSColor clearColor]];
  52
  53     /* let the window sit on top of everything else and start out completely transparent */
  54     [win setLevel:NSModalPanelWindowLevel];
  55     i_device = 0;
  56     [win center];
  57     hideAgainTimer = fadeTimer = nil;
  58     [self setNonActive:nil];
  59     return win;
  60 }
  61
  62 - (void)awakeFromNib
  63 {
  64     [self setContentView:[[VLCFSPanelView alloc] initWithFrame: [self frame]]];
  65     BOOL isInside = (NSPointInRect([NSEvent mouseLocation],[self frame]));
  66     [[self contentView] addTrackingRect:[[self contentView] bounds] owner:self userData:nil assumeInside:isInside];
  67     if (isInside)
  68         [self mouseEntered:NULL];
  69     if (!isInside)
  70         [self mouseExited:NULL];
  71
  72     /* get a notification if VLC isn't the active app anymore */
  73     [[NSNotificationCenter defaultCenter]
  74     addObserver: self
  75        selector: @selector(setNonActive:)
  76            name: NSApplicationDidResignActiveNotification
  77          object: NSApp];
  78
  79     /* get a notification if VLC is the active app again */
  80     [[NSNotificationCenter defaultCenter]
  81     addObserver: self
  82        selector: @selector(setActive:)
  83            name: NSApplicationDidBecomeActiveNotification
  84          object: NSApp];
  85 }
  86
  87 /* Windows created with NSBorderlessWindowMask normally can't be key, but we want ours to be */
  88 - (BOOL)canBecomeKeyWindow
  89 {
  90     return YES;
  91 }
  92
  93 - (BOOL)mouseDownCanMoveWindow
  94 {
  95     return YES;
  96 }
  97
  98 -(void)dealloc
  99 {
 100     [[NSNotificationCenter defaultCenter] removeObserver: self];
 101
 102     if( hideAgainTimer )
 103     {
 104         [hideAgainTimer invalidate];
 105         [hideAgainTimer release];
 106     }
 107     [self setFadeTimer:nil];
 108     [super dealloc];
 109 }
 110
 111 -(void)center
 112 {
 113     /* centre the panel in the lower third of the screen */
 114     NSPoint theCoordinate;
 115     NSRect theScreensFrame;
 116     NSRect theWindowsFrame;
 117     NSScreen *screen;
 118
 119     /* user-defined screen */
 120     screen = [NSScreen screenWithDisplayID: (CGDirectDisplayID)i_device];
 121
 122     if (!screen)
 123     {
 124         /* invalid preferences or none specified, using main screen */
 125         screen = [NSScreen mainScreen];
 126     }
 127
 128     theScreensFrame = [screen frame];
 129
 130     theWindowsFrame = [self frame];
 131
 132     theCoordinate.x = (theScreensFrame.size.width - theWindowsFrame.size.width) / 2 + theScreensFrame.origin.x;
 133     theCoordinate.y = (theScreensFrame.size.height / 3) - theWindowsFrame.size.height + theScreensFrame.origin.y;
 134     [self setFrameTopLeftPoint: theCoordinate];
 135 }
 136
 137 - (void)setPlay
 138 {
 139     [[self contentView] setPlay];
 140 }
 141
 142 - (void)setPause
 143 {
 144     [[self contentView] setPause];
 145 }
 146
 147 - (void)setStreamTitle:(NSString *)o_title
 148 {
 149     [[self contentView] setStreamTitle: o_title];
 150 }
 151
 152 - (void)setStreamPos:(float) f_pos andTime:(NSString *)o_time
 153 {
 154     [[self contentView] setStreamPos:f_pos andTime: o_time];
 155 }
 156
 157 - (void)setSeekable:(BOOL) b_seekable
 158 {
 159     [[self contentView] setSeekable: b_seekable];
 160 }
 161
 162 - (void)setVolumeLevel: (float)f_volumeLevel
 163 {
 164     [[self contentView] setVolumeLevel: f_volumeLevel];
 165 }
 166
 167 - (void)setNonActive:(id)noData
 168 {
 169     b_nonActive = YES;
 170     [self orderOut: self];
 171
 172     /* here's fadeOut, just without visibly fading */
 173     b_displayed = NO;
 174     [self setAlphaValue:0.0];
 175     [self setFadeTimer:nil];
 176     b_fadeQueued = NO;
 177 }
 178
 179 - (void)setActive:(id)noData
 180 {
 181     if( [[[[VLCMain sharedInstance] getControls] getVoutView] isFullscreen] )
 182     {
 183         b_nonActive = NO;
 184         [self fadeIn];
 185     }
 186 }
 187
 188 /* This routine is called repeatedly to fade in the window */
 189 - (void)focus:(NSTimer *)timer
 190 {
 191     /* we need to push ourselves to front if the vout window was closed since our last display */
 192     if( b_voutWasUpdated )
 193     {
 194         [self orderFront: self];
 195         b_voutWasUpdated = NO;
 196     }
 197
 198     if( [self alphaValue] < 1.0 )
 199         [self setAlphaValue:[self alphaValue]+0.1];
 200     if( [self alphaValue] >= 1.0 )
 201     {
 202         b_displayed = YES;
 203         [self setAlphaValue: 1.0];
 204         [self setFadeTimer:nil];
 205         if( b_fadeQueued )
 206         {
 207             b_fadeQueued=NO;
 208             [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(unfocus:) userInfo:NULL repeats:YES]];
 209         }
 210     }
 211 }
 212
 213 /* This routine is called repeatedly to hide the window */
 214 - (void)unfocus:(NSTimer *)timer
 215 {
 216     if( b_keptVisible )
 217     {
 218         b_keptVisible = NO;
 219         b_fadeQueued = NO;
 220         [self setFadeTimer: NULL];
 221         [self fadeIn];
 222         return;
 223     }
 224     if( [self alphaValue] > 0.0 )
 225         [self setAlphaValue:[self alphaValue]-0.05];
 226     if( [self alphaValue] <= 0.05 )
 227     {
 228         b_displayed = NO;
 229         [self setAlphaValue:0.0];
 230         [self setFadeTimer:nil];
 231         if( b_fadeQueued )
 232         {
 233             b_fadeQueued=NO;
 234             [self setFadeTimer:
 235                 [NSTimer scheduledTimerWithTimeInterval:0.1
 236                                                  target:self
 237                                                selector:@selector(focus:)
 238                                                userInfo:NULL
 239                                                 repeats:YES]];
 240         }
 241     }
 242 }
 243
 244 - (void)mouseExited:(NSEvent *)theEvent
 245 {
 246     /* give up our focus, so the vout may show us again without letting the user clicking it */
 247     if( [[[[VLCMain sharedInstance] getControls] getVoutView] isFullscreen] )
 248         [[[[[VLCMain sharedInstance] getControls] getVoutView] window] makeKeyWindow];
 249 }
 250
 251 - (void)hideMouse
 252 {
 253     [NSCursor setHiddenUntilMouseMoves: YES];
 254 }
 255
 256 - (void)fadeIn
 257 {
 258     /* in case that the user don't want us to appear, make sure we hide the mouse */
 259
 260     if( !config_GetInt( VLCIntf, "macosx-fspanel" ) )
 261     {
 262         float time = (float)var_CreateGetInteger( VLCIntf, "mouse-hide-timeout" ) / 1000.;
 263         [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:time target:self selector:@selector(hideMouse) userInfo:nil repeats:NO]];
 264         return;
 265     }
 266
 267     if( b_nonActive )
 268         return;
 269
 270     [self orderFront: nil];
 271
 272     if( [self alphaValue] < 1.0 || b_displayed != YES )
 273     {
 274         if (![self fadeTimer])
 275             [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(focus:) userInfo:[NSNumber numberWithShort:1] repeats:YES]];
 276         else if ([[[self fadeTimer] userInfo] shortValue]==0)
 277             b_fadeQueued=YES;
 278     }
 279     [self autoHide];
 280 }
 281
 282 - (void)fadeOut
 283 {
 284     if( NSPointInRect([NSEvent mouseLocation],[self frame]))
 285         return;
 286
 287     if( ( [self alphaValue] > 0.0 ) )
 288     {
 289         if (![self fadeTimer])
 290             [self setFadeTimer:[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(unfocus:) userInfo:[NSNumber numberWithShort:0] repeats:YES]];
 291         else if ([[[self fadeTimer] userInfo] shortValue]==1)
 292             b_fadeQueued=YES;
 293     }
 294 }
 295
 296 /* triggers a timer to autoHide us again after some seconds of no activity */
 297 - (void)autoHide
 298 {
 299     /* this will tell the timer to start over again or to start at all */
 300     b_keptVisible = YES;
 301
 302     /* get us a valid timer */
 303     if(! b_alreadyCounting )
 304     {
 305         i_timeToKeepVisibleInSec = var_CreateGetInteger( VLCIntf, "mouse-hide-timeout" ) / 500;
 306         if( hideAgainTimer )
 307         {
 308             [hideAgainTimer invalidate];
 309             [hideAgainTimer autorelease];
 310         }
 311         /* released in -autoHide and -dealloc */
 312         hideAgainTimer = [[NSTimer scheduledTimerWithTimeInterval: 0.5
 313                                                           target: self
 314                                                         selector: @selector(keepVisible:)
 315                                                         userInfo: nil
 316                                                          repeats: YES] retain];
 317         b_alreadyCounting = YES;
 318     }
 319 }
 320
 321 - (void)keepVisible:(NSTimer *)timer
 322 {
 323     /* if the user triggered an action, start over again */
 324     if( b_keptVisible )
 325         b_keptVisible = NO;
 326
 327     /* count down until we hide ourselfes again and do so if necessary */
 328     if( --i_timeToKeepVisibleInSec < 1 )
 329     {
 330         [self hideMouse];
 331         [self fadeOut];
 332         [hideAgainTimer invalidate]; /* released in -autoHide and -dealloc */
 333         b_alreadyCounting = NO;
 334     }
 335 }
 336
 337 /* A getter and setter for our main timer that handles window fading */
 338 - (NSTimer *)fadeTimer
 339 {
 340     return fadeTimer;
 341 }
 342
 343 - (void)setFadeTimer:(NSTimer *)timer
 344 {
 345     [timer retain];
 346     [fadeTimer invalidate];
 347     [fadeTimer autorelease];
 348     fadeTimer=timer;
 349 }
 350
 351 - (void)mouseDown:(NSEvent *)theEvent
 352 {
 353     mouseClic = [theEvent locationInWindow];
 354 }
 355
 356 - (void)mouseDragged:(NSEvent *)theEvent
 357 {
 358     NSPoint point = [NSEvent mouseLocation];
 359     point.x -= mouseClic.x;
 360     point.y -= mouseClic.y;
 361     [self setFrameOrigin:point];
 362 }
 363
 364 - (BOOL)isDisplayed
 365 {
 366     return b_displayed;
 367 }
 368
 369 - (void)setVoutWasUpdated: (int)i_newdevice;
 370 {
 371     b_voutWasUpdated = YES;
 372     if( i_newdevice != i_device )
 373     {
 374         i_device = i_newdevice;
 375         [self center];
 376     }
 377 }
 378 @end
 379
 380 /*****************************************************************************
 381  * FSPanelView
 382  *****************************************************************************/
 383 @implementation VLCFSPanelView
 384
 385 #define addButton( o_button, imageOff, imageOn, _x, _y, action )                                \
 386     s_rc.origin.x = _x;                                                                         \
 387     s_rc.origin.y = _y;                                                                         \
 388     o_button = [[NSButton alloc] initWithFrame: s_rc];                                 \
 389     [o_button setButtonType: NSMomentaryChangeButton];                                          \
 390     [o_button setBezelStyle: NSRegularSquareBezelStyle];                                        \
 391     [o_button setBordered: NO];                                                                 \
 392     [o_button setFont:[NSFont systemFontOfSize:0]];                                             \
 393     [o_button setImage:[NSImage imageNamed:imageOff]];                                 \
 394     [o_button setAlternateImage:[NSImage imageNamed:imageOn]];                         \
 395     [o_button sizeToFit];                                                                       \
 396     [o_button setTarget: self];                                                                 \
 397     [o_button setAction: @selector(action:)];                                                   \
 398     [self addSubview:o_button];
 399
 400 #define addTextfield( o_text, align, font, color, size )                                    \
 401     o_text = [[NSTextField alloc] initWithFrame: s_rc];                            \
 402     [o_text setDrawsBackground: NO];                                                        \
 403     [o_text setBordered: NO];                                                               \
 404     [o_text setEditable: NO];                                                               \
 405     [o_text setSelectable: NO];                                                             \
 406     [o_text setStringValue: _NS("(no item is being played)")];                                                    \
 407     [o_text setAlignment: align];                                                           \
 408     [o_text setTextColor: [NSColor color]];                                                 \
 409     [o_text setFont:[NSFont font:[NSFont smallSystemFontSize] - size]];                     \
 410     [self addSubview:o_text];
 411
 412 - (id)initWithFrame:(NSRect)frameRect
 413 {
 414     id view = [super initWithFrame:frameRect];
 415     fillColor = [[NSColor clearColor] retain];
 416     NSRect s_rc = [self frame];
 417     addButton( o_prev, @"fs_skip_previous" , @"fs_skip_previous_highlight", 174, 15, prev );
 418     addButton( o_bwd, @"fs_rewind"        , @"fs_rewind_highlight"       , 211, 14, backward );
 419     addButton( o_play, @"fs_play"          , @"fs_play_highlight"         , 267, 10, play );
 420     addButton( o_fwd, @"fs_forward"       , @"fs_forward_highlight"      , 313, 14, forward );
 421     addButton( o_next, @"fs_skip_next"     , @"fs_skip_next_highlight"    , 365, 15, next );
 422     addButton( o_fullscreen, @"fs_exit_fullscreen", @"fs_exit_fullscreen_hightlight", 507, 13, windowAction );
 423 /*
 424     addButton( o_button, @"image (off state)", @"image (on state)", 38, 51, something );
 425  */
 426
 427     /* time slider */
 428     s_rc = [self frame];
 429     s_rc.origin.x = 15;
 430     s_rc.origin.y = 53;
 431     s_rc.size.width = 518;
 432     s_rc.size.height = 9;
 433     o_fs_timeSlider = [[VLCFSTimeSlider alloc] initWithFrame: s_rc];
 434     [o_fs_timeSlider setMinValue:0];
 435     [o_fs_timeSlider setMaxValue:10000];
 436     [o_fs_timeSlider setFloatValue: 0];
 437     [o_fs_timeSlider setContinuous: YES];
 438     [o_fs_timeSlider setTarget: self];
 439     [o_fs_timeSlider setAction: @selector(fsTimeSliderUpdate:)];
 440     [self addSubview: o_fs_timeSlider];
 441
 442     /* volume slider */
 443     s_rc = [self frame];
 444     s_rc.origin.x = 26;
 445     s_rc.origin.y = 17.5;
 446     s_rc.size.width = 95;
 447     s_rc.size.height = 10;
 448     o_fs_volumeSlider = [[VLCFSVolumeSlider alloc] initWithFrame: s_rc];
 449     [o_fs_volumeSlider setMinValue:0];
 450     [o_fs_volumeSlider setMaxValue:32];
 451     [o_fs_volumeSlider setFloatValue: 0];
 452     [o_fs_volumeSlider setContinuous: YES];
 453     [o_fs_volumeSlider setTarget: self];
 454     [o_fs_volumeSlider setAction: @selector(fsVolumeSliderUpdate:)];
 455     [self addSubview: o_fs_volumeSlider];
 456
 457     /* time counter and stream title output fields */
 458     s_rc = [self frame];
 459     s_rc.origin.x = 98;
 460     s_rc.origin.y = 64;
 461     s_rc.size.width = 352;
 462     s_rc.size.height = 14;
 463     addTextfield( o_streamTitle_txt, NSCenterTextAlignment, systemFontOfSize, whiteColor, 0 );
 464     s_rc.origin.x = 486;
 465     s_rc.origin.y = 64;
 466     s_rc.size.width = 50;
 467     addTextfield( o_streamPosition_txt, NSRightTextAlignment, systemFontOfSize, whiteColor, 0 );
 468
 469     return view;
 470 }
 471
 472 - (void)dealloc
 473 {
 474     [o_fs_timeSlider release];
 475     [o_fs_volumeSlider release];
 476     [o_prev release];
 477     [o_next release];
 478     [o_bwd release];
 479     [o_play release];
 480     [o_fwd release];
 481     [o_fullscreen release];
 482     [o_streamTitle_txt release];
 483     [o_streamPosition_txt release];
 484     [super dealloc];
 485 }
 486
 487 - (void)setPlay
 488 {
 489     [o_play setImage:[NSImage imageNamed:@"fs_play"]];
 490     [o_play setAlternateImage: [NSImage imageNamed:@"fs_play_highlight"]];
 491 }
 492
 493 - (void)setPause
 494 {
 495     [o_play setImage: [NSImage imageNamed:@"fs_pause"]];
 496     [o_play setAlternateImage: [NSImage imageNamed:@"fs_pause_highlight"]];
 497 }
 498
 499 - (void)setStreamTitle:(NSString *)o_title
 500 {
 501     [o_streamTitle_txt setStringValue: o_title];
 502 }
 503
 504 - (void)setStreamPos:(float) f_pos andTime:(NSString *)o_time
 505 {
 506     [o_streamPosition_txt setStringValue: o_time];
 507     [o_fs_timeSlider setFloatValue: f_pos];
 508 }
 509
 510 - (void)setSeekable:(BOOL)b_seekable
 511 {
 512     [o_bwd setEnabled: b_seekable];
 513     [o_fwd setEnabled: b_seekable];
 514     [o_fs_timeSlider setEnabled: b_seekable];
 515 }
 516
 517 - (void)setVolumeLevel: (float)f_volumeLevel
 518 {
 519     [o_fs_volumeSlider setFloatValue: f_volumeLevel];
 520 }
 521
 522 - (IBAction)play:(id)sender
 523 {
 524     [[[VLCMain sharedInstance] getControls] play: sender];
 525 }
 526
 527 - (IBAction)forward:(id)sender
 528 {
 529     [[[VLCMain sharedInstance] getControls] forward: sender];
 530 }
 531
 532 - (IBAction)backward:(id)sender
 533 {
 534     [[[VLCMain sharedInstance] getControls] backward: sender];
 535 }
 536
 537 - (IBAction)prev:(id)sender
 538 {
 539     [[[VLCMain sharedInstance] getControls] prev: sender];
 540 }
 541
 542 - (IBAction)next:(id)sender
 543 {
 544     [[[VLCMain sharedInstance] getControls] next: sender];
 545 }
 546
 547 - (IBAction)windowAction:(id)sender
 548 {
 549     [[[VLCMain sharedInstance] getControls] windowAction: sender];
 550 }
 551
 552 - (IBAction)fsTimeSliderUpdate:(id)sender
 553 {
 554     [[VLCMain sharedInstance] timesliderUpdate: sender];
 555 }
 556
 557 - (IBAction)fsVolumeSliderUpdate:(id)sender
 558 {
 559     [[[VLCMain sharedInstance] getControls] volumeSliderUpdated: sender];
 560 }
 561
 562 #define addImage(image, _x, _y, mode, _width)                                               \
 563     img = [NSImage imageNamed:image];                                              \
 564     image_rect.size = [img size];                                                           \
 565     image_rect.origin.x = 0;                                                                \
 566     image_rect.origin.y = 0;                                                                \
 567     frame.origin.x = _x;                                                                    \
 568     frame.origin.y = _y;                                                                    \
 569     frame.size = [img size];                                                                \
 570     if( _width ) frame.size.width = _width;                                                 \
 571     [img drawInRect:frame fromRect:image_rect operation:mode fraction:1];
 572
 573 - (void)drawRect:(NSRect)rect
 574 {
 575     NSRect frame = [self frame];
 576     NSRect image_rect;
 577     NSImage *img;
 578     addImage( @"fs_background", 0, 0, NSCompositeCopy, 0 );
 579     addImage( @"fs_volume_slider_bar", 26, 22, NSCompositeSourceOver, 0 );
 580     addImage( @"fs_volume_mute", 16, 18, NSCompositeSourceOver, 0 );
 581     addImage( @"fs_volume_max", 124, 17, NSCompositeSourceOver, 0 );
 582     addImage( @"fs_time_slider", 15, 53, NSCompositeSourceOver, 0);
 583 }
 584
 585 @end
 586
 587 /*****************************************************************************
 588  * VLCFSTimeSlider
 589  *****************************************************************************/
 590 @implementation VLCFSTimeSlider
 591 - (void)drawKnobInRect:(NSRect)knobRect
 592 {
 593     NSRect image_rect;
 594     NSImage *img = [NSImage imageNamed:@"fs_time_slider_knob_highlight"];
 595     image_rect.size = [img size];
 596     image_rect.origin.x = 0;
 597     image_rect.origin.y = 0;
 598     knobRect.origin.x += (knobRect.size.width - image_rect.size.width) / 2;
 599     knobRect.size.width = image_rect.size.width;
 600     knobRect.size.height = image_rect.size.height;
 601     [img drawInRect:knobRect fromRect:image_rect operation:NSCompositeSourceOver fraction:1];
 602 }
 603
 604 - (void)drawRect:(NSRect)rect
 605 {
 606     /* Draw default to make sure the slider behaves correctly */
 607     [[NSGraphicsContext currentContext] saveGraphicsState];
 608     NSRectClip(NSZeroRect);
 609     [super drawRect:rect];
 610     [[NSGraphicsContext currentContext] restoreGraphicsState];
 611
 612     NSRect knobRect = [[self cell] knobRectFlipped:NO];
 613     knobRect.origin.y+=7.5;
 614     [[[NSColor blackColor] colorWithAlphaComponent:0.6] set];
 615     [self drawKnobInRect: knobRect];
 616 }
 617
 618 @end
 619
 620 /*****************************************************************************
 621 * VLCFSVolumeSlider
 622 *****************************************************************************/
 623 @implementation VLCFSVolumeSlider
 624 - (void)drawKnobInRect:(NSRect) knobRect
 625 {
 626     NSRect image_rect;
 627     NSImage *img = [NSImage imageNamed:@"fs_volume_slider_knob"];
 628     image_rect.size = [img size];
 629     image_rect.origin.x = 0;
 630     image_rect.origin.y = 0;
 631     knobRect.origin.x += (knobRect.size.width - image_rect.size.width) / 2;
 632     knobRect.size.width = image_rect.size.width;
 633     knobRect.size.height = image_rect.size.height;
 634     [img drawInRect:knobRect fromRect:image_rect operation:NSCompositeSourceOver fraction:1];
 635 }
 636
 637 - (void)drawRect:(NSRect)rect
 638 {
 639     /* Draw default to make sure the slider behaves correctly */
 640     [[NSGraphicsContext currentContext] saveGraphicsState];
 641     NSRectClip(NSZeroRect);
 642     [super drawRect:rect];
 643     [[NSGraphicsContext currentContext] restoreGraphicsState];
 644
 645     NSRect knobRect = [[self cell] knobRectFlipped:NO];
 646     knobRect.origin.y+=6;
 647     [[[NSColor blackColor] colorWithAlphaComponent:0.6] set];
 648     [self drawKnobInRect: knobRect];
 649 }
 650
 651 @end
 652