[系统控件重绘教程(一)]重绘NSWindow

NSWindow的风格一直只有两种，很难看。Panel倒是有种HUD风格的，但window没有，毕竟window和panel的titile大小还是不一样的，网上有关于HUDWindow的代码，不过那是把window的titlebar给隐藏掉，自己画上三个button和右下角可以resize的东东，如果用这个window来弹出sheet的话会很诡异的出现……     就是sheet从window的最上面弹出来了，底层window看不到titlebar了~ @@AL@.*  
NSWindow在设置成Texture模式之后可以设置背景色，不过这是单色，渐进色设置不了。最简单的方法就是先给window设置背景色，再覆盖上一层NSView来填充content的颜色，不过这样不是浑然一体的，每个window都要这样搞的话还是很麻烦的。 krUtOVI  
所以只能从被apple隐藏起来的方法里找办法了~所以class-dump出来看看~ ij ?7MP  
你会发现在NSWindow.h中绘制界面的函数几乎没有，不想那些继承与NSView的控件一样，那么多私有的绘制方法。那window是怎样绘制的呢。 w\)K0RN  
仔细观察，你会发现NSWindow有很多扩展类，而且window功能性的东西是非常多的，所以它的重绘肯定是委托给别人来做了（这一点通过获取NSWindow的closebutton可以知道，那三个button都不是标准的NSButton，而是 NSThemeButton？记不太清楚了）。经过查找可以发现函数

? 1 +(Class)frameViewClassForStyleMask:(unsigned int )styleMask

非常可疑，而且dump出来的类有一个叫做NSThemeFrame的，查看它的类方法，哈哈，发现了吧，全是跟window有关的绘制方法。 suY47DCX)  
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所以接下来的事情就很简单了，写一个类继承 NSThemeFrame *'>_X X  

? 1 2 3 4 5 6 #import <COCOA Cocoa.h> #import "NSThemeFrame.h" @interface KAThemeFrame : NSThemeFrame { } @end

P_(8+)ud-  
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那么需要重写哪些函数呢～我们的目标是重画TitleBar，具体窗体的内容不需要重画，因为反正有一个NSView要覆盖在上面的，所以一个方法就足够了，废话少说，上代码 )9hqd  

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 #import "KAThemeFrame.h"    @implementation KAThemeFrame    - ( id )contentFill {      // This color is used only when dragging.      // Please don't try to modify the value.      return [ NSColor colorWithCalibratedWhite:.13 alpha:1]; }    - ( id )frameColor {      return [ NSColor redColor]; }    - ( void )_drawTitleBar:( NSRect )rect {      NSRect titleRect = [ self titlebarRect];             // Panel style      if ([ self _isUtility])      {          KAGradient *titleGradient = [KAGradient gradientWithStartingColor: [ NSColor colorWithCalibratedRed:0.423f green:0.423f blue:0.423f alpha:1.0]                                                                 endingColor: [ NSColor colorWithCalibratedRed:0.365f green:0.365f blue:0.365f alpha:1.0]];          [titleGradient drawInRect:titleRect angle:-90];      }      // Window style      else      {          float radius = 4;          NSBezierPath *borderPath = [ NSBezierPath bezierPathWithRoundedRect:titleRect cornerRadius:radius inCorners:(OSTopLeftCorner | OSTopRightCorner)];          NSBezierPath *titlebarPath = [ NSBezierPath bezierPathWithRoundedRect: NSInsetRect (titleRect, 1, 1) cornerRadius:radius-1 inCorners:(OSTopLeftCorner | OSTopRightCorner)];                     KAGradient *titleGradient  = [KAGradient gradientWithStartingColor: [ NSColor colorWithCalibratedRed:0.423f green:0.423f blue:0.423f alpha:1.0]                                                                  endingColor: [ NSColor colorWithCalibratedRed:0.365f green:0.365f blue:0.365f alpha:1.0]];          KAGradient *borderGradient = [KAGradient gradientWithStartingColor: [ NSColor colorWithCalibratedRed:0.423f green:0.423f blue:0.423f alpha:1.0]                                                                  endingColor: [ NSColor colorWithCalibratedRed:0.365f green:0.365f blue:0.365f alpha:1.0]];                                [[ NSColor clearColor] set];          NSRectFill (titleRect);                     [borderGradient drawInBezierPath:borderPath angle:-90];          [titleGradient drawInBezierPath:titlebarPath angle:-90];                 }      [ self _drawTitleStringIn:[ self _titlebarTitleRect] withColor:[ NSColor colorWithDeviceWhite:.75 alpha:1]]; } @end

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这样你就有一个属于自己自定义的TitileBar的window了～ KN}#8.'>3  
当然你自己实现的画还可以区分HUD啊，Texture啊啥的风格来重画～ ;z'&$#pA  
当然你也可以通过重写

? 1 - ( void )_drawFrameRects:( NSRect )fp8;

来画背景。 h.edb6  
到这里可以说重绘NSWindow已经完成了，但是怎样通过styleMask来控制它的重绘呢，怎样创建一个IBPlugin来在IB里拖出你自己的window呢，怎样为这个window设置一个你自己的contentview呢？ |'h (S|  
且听下（下下？）回分解～先讲完重绘，再讲创建IBPlugin。 CD&a_-'z$K  
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这里给出KAGradient的代码（支持10.4/10.5/10.6）很简单的一个工厂模式，为了使用接口一致，所以堆NSGradient做了封装～_KAGradient在10.5/10.6有performance问题～ 7m2iL#5[  

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 @protocol KAGradientProtocol    + ( id ) gradientWithStartingColor: ( NSColor *) startingColor                  endingColor: ( NSColor *) endingColor;    - ( id ) initWithStartingColor: ( NSColor *) startingColor                   endingColor: ( NSColor *) endingColor; - ( void ) addColorStop: ( NSColor *) stopColor             atPosition: (CGFloat) position;    - ( void ) drawFromPoint: ( NSPoint ) startingPoint                 toPoint: ( NSPoint ) endingPoint; - ( void ) drawFromCenter: ( NSPoint ) startingCenter                   radius: (CGFloat) startRadius                 toCenter: ( NSPoint ) endCenter                   radius: (CGFloat) endRadius;    - ( void ) drawInRect: ( NSRect ) rect                 angle: (CGFloat) angle; - ( void ) drawInBezierPath: ( NSBezierPath *) path                       angle: (CGFloat) angle;    - ( void ) drawRadialInRect: ( NSRect ) rect; - ( void ) drawRadialInBezierPath: ( NSBezierPath *) path;    @end

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? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 #import <COCOA Cocoa.h> #import "KAGradientProtocol.h"    typedef struct _KAGradientElement       {          CGFloat red, green, blue, alpha;          CGFloat position;                     struct _KAGradientElement *nextElement;      } KAGradientElement;    typedef enum  _KABlendingMode      {          KALinearBlendingMode,          KAChromaticBlendingMode,          KAInverseChromaticBlendingMode,      } KAGradientBlendingMode;    /*!       @class       @abstract    Private Gradient class which will be used on 10.4.       @discussion  The is a class which uses Quartz to draw gradient graphics on                     10.4. You can add color stop after initialization.   */ @interface _KAGradient : NSObject <KAGRADIENTPROTOCOL> {      KAGradientElement* elementList;      KAGradientBlendingMode blendingMode;             CGFunctionRef gradientFunction;     } @end

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? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 #import "_KAGradient.h"    @interface  _KAGradient (PrivateMethods)    - ( void )_commonInit;    - ( void )setBlendingMode:(KAGradientBlendingMode)mode; - (KAGradientBlendingMode)blendingMode;    - ( void )addElement:(KAGradientElement*)newElement; - (KAGradientElement *)elementAtIndex:(unsigned)index; - (KAGradientElement)removeElementAtIndex:(unsigned)index; - (KAGradientElement)removeElementAtPosition:( float )position;    @end    //C Fucti***** for color blending static void linearEvaluation   ( void *info, c*****t float *in, float *out); static void chromaticEvaluation( void *info, c*****t float *in, float *out); static void inverseChromaticEvaluation( void *info, c*****t float *in, float *out); static void transformRGB_HSV( float *components); static void transformHSV_RGB( float *components); static void resolveHSV( float *color1, float *color2);    @implementation _KAGradient    + gradientWithStartingColor: ( NSColor *) startingColor                  endingColor: ( NSColor *) endingColor {      _KAGradient* instance = [[[ self class ] alloc] init];             KAGradientElement color1;      KAGradientElement color2;             [[startingColor colorUsingColorSpaceName: NSCalibratedRGBColorSpace ] getRed: &color1.red                                                                             green: &color1.green                                                                             blue: &color1.blue                                                                             alpha: &color1.alpha];      [[endingColor colorUsingColorSpaceName: NSCalibratedRGBColorSpace ] getRed: &color2.red                                                                          green: &color2.green                                                                           blue: &color2.blue                                                                          alpha: &color2.alpha];      color1.position = 0;      color2.position = 1;             [instance addElement: &color1];      [instance addElement: &color2];             return [instance autorelease]; }    - ( id ) init {      if ( self = [ super init])      {          [ self _commonInit];          [ self setBlendingMode: KALinearBlendingMode];      }      return self ; }    - ( id ) initWithStartingColor: ( NSColor *) startingColor                   endingColor: ( NSColor *) endingColor {      self = [ super init];             if ( self )      {          [ self _commonInit];          [ self setBlendingMode: KALinearBlendingMode];                     KAGradientElement color1;          KAGradientElement color2;                     [[startingColor colorUsingColorSpaceName: NSCalibratedRGBColorSpace ] getRed: &color1.red                                                                                 green: &color1.green                                                                                 blue: &color1.blue                                                                                 alpha: &color1.alpha];          [[endingColor colorUsingColorSpaceName: NSCalibratedRGBColorSpace ] getRed: &color2.red                                                                              green: &color2.green                                                                               blue: &color2.blue                                                                              alpha: &color2.alpha];          color1.position = 0;          color2.position = 1;                     [ self addElement: &color1];          [ self addElement: &color2];      }                    return self ; }    - ( void ) dealloc {      CGFunctionRelease(gradientFunction);             KAGradientElement* elementToRemove = elementList;      while (elementList != nil )      {          elementToRemove = elementList;          elementList = elementList->nextElement;          free(elementToRemove);      }             [ super dealloc]; }    - ( id ) copyWithZone: ( NSZone *) zone {      _KAGradient * copy = [[[ self class ] allocWithZone: zone] init];             // now just copy my elementList      KAGradientElement* currentElement = elementList;      while (currentElement)      {          [ copy addElement: currentElement];          currentElement = currentElement->nextElement;      }             [ copy setBlendingMode: blendingMode];             return copy ; }    - ( void )encodeWithCoder:( NSCoder *)coder {      if ([coder allowsKeyedCoding])      {          unsigned count = 0;          KAGradientElement *currentElement = elementList;          while(currentElement != nil )          {              [coder encodeValueOfObjCType: @encode ( float ) at:&(currentElement->red)];              [coder encodeValueOfObjCType: @encode ( float ) at:&(currentElement->green)];              [coder encodeValueOfObjCType: @encode ( float ) at:&(currentElement->blue)];              [coder encodeValueOfObjCType: @encode ( float ) at:&(currentElement->alpha)];              [coder encodeValueOfObjCType: @encode ( float ) at:&(currentElement->position)];                             count++;              currentElement = currentElement->nextElement;          }          [coder encodeInt:count forKey:@ "KAGradientElementCount" ];          [coder encodeInt:blendingMode forKey:@ "KAGradientBlendingMode" ];      }      else          [ NSException raise: NSInvalidArchiveOperationException format:@ "Only supports NSKeyedArchiver coders" ]; }    - ( id )initWithCoder:( NSCoder *)coder {      [ self _commonInit];             [ self setBlendingMode:[coder decodeIntForKey:@ "KAGradientBlendingMode" ]];      unsigned count = [coder decodeIntForKey:@ "KAGradientElementCount" ];             while(count != 0)      {          KAGradientElement newElement;                     [coder decodeValueOfObjCType: @encode ( float ) at:&(newElement.red)];          [coder decodeValueOfObjCType: @encode ( float ) at:&(newElement.green)];          [coder decodeValueOfObjCType: @encode ( float ) at:&(newElement.blue)];          [coder decodeValueOfObjCType: @encode ( float ) at:&(newElement.alpha)];          [coder decodeValueOfObjCType: @encode ( float ) at:&(newElement.position)];                     count--;          [ self addElement:&newElement];      }      return self ; } #pragma mark -    #pragma mark [PrivateMethods] - ( void )_commonInit {      elementList = nil ; }    - ( void )setBlendingMode:(KAGradientBlendingMode)mode {      blendingMode = mode;             //Choose what blending function to use      void *evaluationFunction;      switch (blendingMode)      {          case KALinearBlendingMode:              evaluationFunction = &linearEvaluation;            break ;          case KAChromaticBlendingMode:              evaluationFunction = &chromaticEvaluation;            break ;          case KAInverseChromaticBlendingMode:              evaluationFunction = &inverseChromaticEvaluation;    break ;      }             //replace the current CoreGraphics Function with new one      if (gradientFunction != NULL )          CGFunctionRelease(gradientFunction);             CGFunctionCallbacks evaluationCallbackInfo = {0 , evaluationFunction, NULL };    //Version, evaluator function, cleanup function             static c*****t float input_value_range   [2] = { 0, 1 };                        //range  for the evaluator input      static c*****t float output_value_ranges [8] = { 0, 1, 0, 1, 0, 1, 0, 1 };        //ranges for the evaluator output (4 returned values)             gradientFunction = CGFunctionCreate(&elementList,                    //the two transition colors                                          1, input_value_range  ,        //number of inputs (just fraction of progression)                                          4, output_value_ranges,        //number of outputs (4 - RGBa)                                          &evaluationCallbackInfo);        //info for using the evaluator function        } - (KAGradientBlendingMode)blendingMode {      return blendingMode; }    - ( void )addElement:(KAGradientElement*)newElement {      if (elementList == nil || newElement->position < elementList->position)      {          // insert at the beginning          KAGradientElement* tmpNext = elementList;          elementList = malloc( sizeof (KAGradientElement));          *elementList = *newElement;          elementList->nextElement = tmpNext;      }      else      {          KAGradientElement* currentElement = elementList;          while (currentElement->nextElement != nil                  && !((currentElement->position <= newElement->position)                       && (newElement->position < currentElement->nextElement->position)))          {              currentElement = currentElement->nextElement;          }                     KAGradientElement* tmpNext = currentElement->nextElement;          currentElement->nextElement = malloc( sizeof (KAGradientElement));          *(currentElement->nextElement) = *newElement;          currentElement->nextElement->nextElement = tmpNext;      } } - (KAGradientElement *)elementAtIndex:(unsigned)index {      unsigned count = 0;      KAGradientElement *currentElement = elementList;             while (currentElement != nil )      {          if (count == index)              return currentElement;                     count++;          currentElement = currentElement->nextElement;      }             return nil ; } - (KAGradientElement)removeElementAtIndex:(unsigned)index {      KAGradientElement removedElement;             if (elementList != nil )      {          if (index == 0)          {              KAGradientElement *tmpNext = elementList;              elementList = elementList->nextElement;                             removedElement = *tmpNext;              free(tmpNext);                             return removedElement;          }                     unsigned count = 1;        //we want to start one ahead          KAGradientElement *currentElement = elementList;          while(currentElement->nextElement != nil )          {              if (count == index)              {                  KAGradientElement *tmpNext  = currentElement->nextElement;                  currentElement->nextElement = currentElement->nextElement->nextElement;                                     removedElement = *tmpNext;                  free(tmpNext);                                     return removedElement;              }                             count++;              currentElement = currentElement->nextElement;          }      }             //element is not found, return empty element      removedElement.red   = 0.0;      removedElement.green = 0.0;      removedElement.blue  = 0.0;      removedElement.alpha = 0.0;      removedElement.position = NAN;      removedElement.nextElement = nil ;             return removedElement; } - (KAGradientElement)removeElementAtPosition:( float )position {      KAGradientElement removedElement;             if (elementList != nil )      {          if (elementList->position == position)          {              KAGradientElement *tmpNext = elementList;              elementList = elementList->nextElement;                             removedElement = *tmpNext;              free(tmpNext);                             return removedElement;          }          else          {              KAGradientElement *curElement = elementList;              while(curElement->nextElement != nil )              {                  if (curElement->nextElement->position == position)                  {                      KAGradientElement *tmpNext = curElement->nextElement;                      curElement->nextElement = curElement->nextElement->nextElement;                                             removedElement = *tmpNext;                      free(tmpNext);                                             return removedElement;                  }              }          }      }             //element is not found, return empty element      removedElement.red   = 0.0;      removedElement.green = 0.0;      removedElement.blue  = 0.0;      removedElement.alpha = 0.0;      removedElement.position = NAN;      removedElement.nextElement = nil ;             return removedElement; }    #pragma mark [color stop] - ( void ) addColorStop: ( NSColor *) stopColor             atPosition: (CGFloat) position {      if ( nil == stopColor)          [ NSException raise: NSInvalidArgumentException format:@ "The incoming color can't be nil" ];      if (position < 0.0f || position > 1.0f)          [ NSException raise: NSInvalidArgumentException format:@ "Location value should > 0.0f and < 1.0f. It can't be %f" , position];             KAGradientElement newElement;             // put the components of color into the newElement       //- must make sure it is a RGB color (not gray or CMYK)      [[stopColor colorUsingColorSpaceName: NSCalibratedRGBColorSpace ] getRed: &newElement.red                                                                        green: &newElement.green                                                                         blue: &newElement.blue                                                                         alpha: &newElement.alpha];      newElement.position = position;      [ self addElement: &newElement]; }    #pragma mark [Draw functi*****] // draw - ( void ) drawFromPoint: ( NSPoint ) startingPoint                 toPoint: ( NSPoint ) endingPoint {        } - ( void ) drawFromCenter: ( NSPoint ) startingCenter                   radius: (CGFloat) startRadius                 toCenter: ( NSPoint ) endCenter                   radius: (CGFloat) endRadius {        }    - ( void ) drawInRect: ( NSRect ) rect                 angle: (CGFloat) angle {      //First Calculate where the beginning and ending points should be      CGPoint startPoint;      CGPoint endPoint;             if (angle == 0)        //screw the calculati***** - we know the answer        {          startPoint = CGPointMake( NSMinX (rect), NSMinY (rect));    //right of rect          endPoint   = CGPointMake( NSMaxX (rect), NSMinY (rect));    //left  of rect        }      else if (angle == 90)    //same as above        {          startPoint = CGPointMake( NSMinX (rect), NSMinY (rect));    //bottom of rect          endPoint   = CGPointMake( NSMinX (rect), NSMaxY (rect));    //top    of rect        }      else                        //ok, we'll do the calculati***** now         {          float x,y;          float sina, cosa, tana;                     float length;          float deltax,          deltay;                     float rangle = angle * pi/180;    //convert the angle to radians                     if (fabsf(tan(rangle))<=1)    //for range [-45,45], [135,225]          {              x = NSWidth (rect);              y = NSHeight (rect);                             sina = sin(rangle);              cosa = cos(rangle);              tana = tan(rangle);                             length = x/fabsf(cosa)+(y-x*fabsf(tana))*fabsf(sina);                             deltax = length*cosa/2;              deltay = length*sina/2;          }          else                        //for range [45,135], [225,315]          {              x = NSHeight (rect);              y = NSWidth (rect);                             sina = sin(rangle - 90*pi/180);              cosa = cos(rangle - 90*pi/180);              tana = tan(rangle - 90*pi/180);                             length = x/fabsf(cosa)+(y-x*fabsf(tana))*fabsf(sina);                             deltax =-length*sina/2;              deltay = length*cosa/2;          }                     startPoint = CGPointMake( NSMidX (rect)-deltax, NSMidY (rect)-deltay);          endPoint   = CGPointMake( NSMidX (rect)+deltax, NSMidY (rect)+deltay);      }             //Calls to CoreGraphics      CGContextRef currentContext = (CGContextRef)[[ NSGraphicsContext currentContext] graphicsPort];      CGContextSaveGState(currentContext); #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_4      CGColorSpaceRef colorspace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB); #else      CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB(); #endif      CGShadingRef myCGShading = CGShadingCreateAxial(colorspace, startPoint, endPoint, gradientFunction, false , false );             CGContextClipToRect (currentContext, *(CGRect *)&rect);    //This is where the action happens      CGContextDrawShading(currentContext, myCGShading);             CGShadingRelease(myCGShading);      CGColorSpaceRelease(colorspace );      CGContextRestoreGState(currentContext); } - ( void ) drawInBezierPath: ( NSBezierPath *) path                       angle: (CGFloat) angle {      NSGraphicsContext *currentContext = [ NSGraphicsContext currentContext];      [currentContext saveGraphicsState];      NSAffineTransform *transform = [[ NSAffineTransform alloc] init];             [transform rotateByDegrees:-angle];      [path transformUsingAffineTransform:transform];      [transform invert];      [transform concat];             [path addClip];      [ self drawInRect:[path bounds] angle:0];      [path transformUsingAffineTransform:transform];      [transform release];      [currentContext restoreGraphicsState]; }    - ( void ) drawRadialInRect: ( NSRect ) rect {      CGPoint startPoint, endPoint;      float startRadius, endRadius;      float scalex, scaley, transx, transy;             startPoint = endPoint = CGPointMake( NSMidX (rect), NSMidY (rect));             startRadius = -1;      if ( NSHeight (rect)> NSWidth (rect))      {          scalex = NSWidth (rect)/ NSHeight (rect);          transx = rect.origin.x + ( NSHeight (rect)- NSWidth (rect))/2;          scaley = 1;          transy = 1;          endRadius = NSHeight (rect)/2;      }      else      {          scalex = 1;          transx = 1;          scaley = NSHeight (rect)/ NSWidth (rect);          transy = rect.origin.y + ( NSWidth (rect)- NSHeight (rect))/2;          endRadius = NSWidth (rect)/2;      }             //Calls to CoreGraphics      CGContextRef currentContext = (CGContextRef)[[ NSGraphicsContext currentContext] graphicsPort];      CGContextSaveGState(currentContext); #if MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_4      CGColorSpaceRef colorspace = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB); #else      CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB(); #endif      CGShadingRef myCGShading = CGShadingCreateRadial(colorspace, startPoint, startRadius, endPoint, endRadius, gradientFunction, true , true );             CGContextClipToRect  (currentContext, *(CGRect *)&rect);      CGContextScaleCTM    (currentContext, scalex, scaley);      CGContextTranslateCTM(currentContext, transx, transy);      CGContextDrawShading (currentContext, myCGShading);        //This is where the action happens             CGShadingRelease(myCGShading);      CGColorSpaceRelease(colorspace);      CGContextRestoreGState(currentContext); } - ( void ) drawRadialInBezierPath: ( NSBezierPath *) path {      NSGraphicsContext *currentContext = [ NSGraphicsContext currentContext];      [currentContext saveGraphicsState];      [path addClip];      [ self drawRadialInRect:[path bounds]];      [currentContext restoreGraphicsState]; } #pragma mark -    #pragma mark Core Graphics //Blending Functi*****/ void linearEvaluation ( void *info, c*****t float *in, float *out) {      float position = *in;             if (*(KAGradientElement **)info == nil )    //if elementList is empty return clear color      {          out[0] = out[1] = out[2] = out[3] = 1;          return ;      }             //This grabs the first two colors in the sequence      KAGradientElement *color1 = *(KAGradientElement **)info;      KAGradientElement *color2 = color1->nextElement;             //make sure first color and second color are on other sides of position      while(color2 != nil && color2->position < position)        {          color1 = color2;          color2 = color1->nextElement;        }      //if we don't have another color then make next color the same color      if (color2 == nil )      {          color2 = color1;      }             //----------FailSafe settings----------      //color1->red   = 1; color2->red   = 0;      //color1->green = 1; color2->green = 0;      //color1->blue  = 1; color2->blue  = 0;      //color1->alpha = 1; color2->alpha = 1;      //color1->position = .5;      //color2->position = .5;      //-------------------------------------             if (position <= color1->position)            //Make all below color color1's position equal to color1        {          out[0] = color1->red;           out[1] = color1->green;          out[2] = color1->blue;          out[3] = color1->alpha;        }      else if (position >= color2->position)    //Make all above color color2's position equal to color2        {          out[0] = color2->red;           out[1] = color2->green;          out[2] = color2->blue;          out[3] = color2->alpha;        }      else                                        //Interpolate color at posti***** between color1 and color1        {          //adjust position so that it goes from 0 to 1 in the range from color 1 & 2's position           position = (position-color1->position)/(color2->position - color1->position);                     out[0] = (color2->red   - color1->red  )*position + color1->red;           out[1] = (color2->green - color1->green)*position + color1->green;          out[2] = (color2->blue  - color1->blue )*position + color1->blue;          out[3] = (color2->alpha - color1->alpha)*position + color1->alpha;      }             //Premultiply the color by the alpha.      out[0] *= out[3];      out[1] *= out[3];      out[2] *= out[3]; }    //Chromatic Evaluation -  //    This blends colors by their Hue, Saturation, and Value(Brightness) right now I just  //    transform the RGB values stored in the KAGradientElements to HSB, in the future I may //    streamline it to avoid transforming in and out of HSB colorspace *for later* // //    For the chromatic blend we shift the hue of color1 to meet the hue of color2. To do //    this we will add to the hue's angle (if we subtract we'll be doing the inverse //    chromatic...scroll down more for that). All we need to do is keep adding to the hue //  until we wrap around the colorwheel and get to color2. void chromaticEvaluation( void *info, c*****t float *in, float *out) {      float position = *in;             if (*(KAGradientElement **)info == nil )    //if elementList is empty return clear color      {          out[0] = out[1] = out[2] = out[3] = 1;          return ;      }             //This grabs the first two colors in the sequence      KAGradientElement *color1 = *(KAGradientElement **)info;      KAGradientElement *color2 = color1->nextElement;             float c1[4];      float c2[4];             //make sure first color and second color are on other sides of position      while(color2 != nil && color2->position < position)        {          color1 = color2;          color2 = color1->nextElement;        }      //if we don't have another color then make next color the same color      if (color2 == nil )      {          color2 = color1;      }                    c1[0] = color1->red;       c1[1] = color1->green;      c1[2] = color1->blue;      c1[3] = color1->alpha;             c2[0] = color2->red;       c2[1] = color2->green;      c2[2] = color2->blue;      c2[3] = color2->alpha;             transformRGB_HSV(c1);      transformRGB_HSV(c2);      resolveHSV(c1,c2);             if (c1[0] > c2[0]) //if color1's hue is higher than color2's hue then           c2[0] += 360;    //    we need to move c2 one revolution around the wheel                    if (position <= color1->position)            //Make all below color color1's position equal to color1        {          out[0] = c1[0];           out[1] = c1[1];          out[2] = c1[2];          out[3] = c1[3];        }      else if (position >= color2->position)    //Make all above color color2's position equal to color2        {          out[0] = c2[0];           out[1] = c2[1];          out[2] = c2[2];          out[3] = c2[3];        }      else                                        //Interpolate color at posti***** between color1 and color1        {          //adjust position so that it goes from 0 to 1 in the range from color 1 & 2's position           position = (position-color1->position)/(color2->position - color1->position);                     out[0] = (c2[0] - c1[0])*position + c1[0];           out[1] = (c2[1] - c1[1])*position + c1[1];          out[2] = (c2[2] - c1[2])*position + c1[2];          out[3] = (c2[3] - c1[3])*position + c1[3];        }             transformHSV_RGB(out);             //Premultiply the color by the alpha.      out[0] *= out[3];      out[1] *= out[3];      out[2] *= out[3]; }    //Inverse Chromatic Evaluation -  //    Inverse Chromatic is about the same story as Chromatic Blend, but here the Hue //    is strictly decreasing, that is we need to get from color1 to color2 by decreasing //    the 'angle' (i.e. 90o -> 180o would be done by subtracting 270o and getting -180o... //    which is equivalent to 180o mod 360o void inverseChromaticEvaluation( void *info, c*****t float *in, float *out) {      float position = *in;             if (*(KAGradientElement **)info == nil )    //if elementList is empty return clear color      {          out[0] = out[1] = out[2] = out[3] = 1;          return ;      }             //This grabs the first two colors in the sequence      KAGradientElement *color1 = *(KAGradientElement **)info;      KAGradientElement *color2 = color1->nextElement;             float c1[4];      float c2[4];             //make sure first color and second color are on other sides of position      while(color2 != nil && color2->position < position)        {          color1 = color2;          color2 = color1->nextElement;        }      //if we don't have another color then make next color the same color      if (color2 == nil )      {          color2 = color1;      }             c1[0] = color1->red;       c1[1] = color1->green;      c1[2] = color1->blue;      c1[3] = color1->alpha;             c2[0] = color2->red;       c2[1] = color2->green;      c2[2] = color2->blue;      c2[3] = color2->alpha;             transformRGB_HSV(c1);      transformRGB_HSV(c2);      resolveHSV(c1,c2);             if (c1[0] < c2[0]) //if color1's hue is higher than color2's hue then           c1[0] += 360;    //    we need to move c2 one revolution back on the wheel                    if (position <= color1->position)            //Make all below color color1's position equal to color1        {          out[0] = c1[0];           out[1] = c1[1];          out[2] = c1[2];          out[3] = c1[3];        }      else if (position >= color2->position)    //Make all above color color2's position equal to color2        {          out[0] = c2[0];           out[1] = c2[1];          out[2] = c2[2];          out[3] = c2[3];        }      else                                        //Interpolate color at posti***** between color1 and color1        {          //adjust position so that it goes from 0 to 1 in the range from color 1 & 2's position           position = (position-color1->position)/(color2->position - color1->position);                     out[0] = (c2[0] - c1[0])*position + c1[0];           out[1] = (c2[1] - c1[1])*position + c1[1];          out[2] = (c2[2] - c1[2])*position + c1[2];          out[3] = (c2[3] - c1[3])*position + c1[3];        }             transformHSV_RGB(out);             //Premultiply the color by the alpha.      out[0] *= out[3];      out[1] *= out[3];      out[2] *= out[3]; }       void transformRGB_HSV( float *components) //H,S,B -> R,G,B {      float H, S, V;      float R = components[0],      G = components[1],      B = components[2];             float MAX = R > G ? (R > B ? R : B) : (G > B ? G : B),      MIN = R < G ? (R < B ? R : B) : (G < B ? G : B);             if (MAX == MIN)          H = NAN;      else if (MAX == R)          if (G >= B)              H = 60*(G-B)/(MAX-MIN)+0;          else              H = 60*(G-B)/(MAX-MIN)+360;          else if (MAX == G)              H = 60*(B-R)/(MAX-MIN)+120;          else if (MAX == B)              H = 60*(R-G)/(MAX-MIN)+240;             S = MAX == 0 ? 0 : 1 - MIN/MAX;      V = MAX;             components[0] = H;      components[1] = S;      components[2] = V; }    void transformHSV_RGB( float *components) //H,S,B -> R,G,B {      float R, G, B;      float H = fmodf(components[0],359),    //map to [0,360)      S = components[1],      V = components[2];             int   Hi = ( int )floorf(H/60.) % 6;      float f  = H/60-Hi,      p  = V*(1-S),      q  = V*(1-f*S),      t  = V*(1-(1-f)*S);             switch (Hi)      {          case 0:    R=V;G=t;B=p;    break ;          case 1:    R=q;G=V;B=p;    break ;          case 2:    R=p;G=V;B=t;    break ;          case 3:    R=p;G=q;B=V;    break ;          case 4:    R=t;G=p;B=V;    break ;          case 5:    R=V;G=p;B=q;    break ;      }             components[0] = R;      components[1] = G;      components[2] = B; }    void resolveHSV( float *color1, float *color2)    //H value may be undefined (i.e. graycale color) {                                            //    we want to fill it with a sensible value      if (isnan(color1[0]) && isnan(color2[0]))          color1[0] = color2[0] = 0;      else if (isnan(color1[0]))          color1[0] = color2[0];      else if (isnan(color2[0]))          color2[0] = color1[0]; }

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*y4DK6OFe  

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 #import <COCOA Cocoa.h> #import "KAGradientProtocol.h"    /*!      @class      @abstract    Private Gradient class which will be used on OS X which version                   is more than 10.5      @discussion  The is a class which uses NSGradient to draw graphics on                    10.5/10.6. And it has the different draw methods than NSGradient.                   You can add color stop after initialization. */ @interface _NSGradient : NSObject <KAGRADIENTPROTOCOL> { @private      NSGradient        *m_Gradient;      NSMutableArray    *m_Colors;      NSMutableArray    *m_Locati*****;             int                __colorsCount; }    /*!      @function      @abstract   Add color stop      @discussion You can add a color stop after initialization.      @param      color The color you want to add.      @param        location The color location. The value should between 0.0f and 1.0f.      @result     Void.      @exception    NSInvalidArgumentException If the colro is nil or value of                   location is invalid, it will rasie the exception. */ - ( void ) addColor:( NSColor *) color andLocation:(CGFloat) location;    #pragma mark Accessors - ( NSGradient *) m_Gradient; - ( void ) setM_Gradient: ( NSGradient *) newValue; - ( NSMutableArray *) m_Colors; - ( void ) setM_Colors: ( NSMutableArray *) newValue; - ( NSMutableArray *) m_Locati*****; - ( void ) setM_Locati*****: ( NSMutableArray *) newValue; @end

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? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 #import "_NSGradient.h"       @implementation _NSGradient    - ( void ) dealloc {      [ self setM_Colors: nil ];      [ self setM_Gradient: nil ];      [ self setM_Locati*****: nil ];             [ super dealloc]; }    #pragma mark Protocol Methods + ( id ) gradientWithStartingColor: ( NSColor *) startingColor                       endingColor: ( NSColor *) endingColor {      return [[[ self alloc] initWithStartingColor:startingColor endingColor:endingColor] autorelease]; }    - ( id ) initWithStartingColor: ( NSColor *) startingColor                   endingColor: ( NSColor *) endingColor {      if ( self = [ super init])      {          [ self setM_Colors:[ NSMutableArray array]];          [ self setM_Locati*****:[ NSMutableArray array]];                     [ self addColor:startingColor andLocation:0.0f];          [ self addColor:endingColor andLocation:1.0f];      }      return self ; }    - ( void ) addColorStop: ( NSColor *) stopColor             atPosition: (CGFloat) position {      [ self addColor:stopColor andLocation:position]; }    - ( void ) drawFromPoint: ( NSPoint ) startingPoint                 toPoint: ( NSPoint ) endingPoint {      [ self _initGradientInstance];      [m_Gradient drawFromPoint:startingPoint                         toPoint:endingPoint                         opti*****: NSGradientDrawsAfterEndingLocation ]; }    - ( void ) drawFromCenter: ( NSPoint ) startingCenter                   radius: (CGFloat) startRadius                 toCenter: ( NSPoint ) endCenter                   radius: (CGFloat) endRadius {      [ self _initGradientInstance];      [m_Gradient drawFromCenter:startingCenter                           radius:startRadius                         toCenter:endCenter                           radius:endRadius                          opti*****: NSGradientDrawsAfterEndingLocation ]; }    - ( void ) drawInRect: ( NSRect ) rect                 angle: (CGFloat) angle {      [ self _initGradientInstance];      [m_Gradient drawInRect:rect angle:angle]; }    - ( void ) drawInBezierPath: ( NSBezierPath *) path                       angle: (CGFloat) angle {      [ self _initGradientInstance];      [m_Gradient drawInBezierPath:path angle:angle]; }    - ( void ) drawRadialInRect: ( NSRect ) rect {      [ self _initGradientInstance];      [m_Gradient drawInRect:rect relativeCenterPosition: NSZeroPoint ]; }    - ( void ) drawRadialInBezierPath: ( NSBezierPath *) path {      [ self _initGradientInstance];      [m_Gradient drawInBezierPath:path relativeCenterPosition: NSZeroPoint ]; }       #pragma mark Private Methods /*!      @function      @abstract   The private method to init the gradient instance.      @discussion Beacuse we need to add color after initialization, we can't init                  the gradient instance before starting drawing. The method should                  only be invoked when drawing.      @param      nil      @result     void      @exception    NSInvalidArgumentException If the graident have less than 2 color                  stops, it will raise this exception. */ - ( void ) _initGradientInstance {      // Gradients must have at least two color stops: one defining the location of the start color and one defining the location of the end color.      // Gradients may have additional color stops located at different transition points in between the start and end stops.      if (__colorsCount < 2)          [ NSException raise: NSInvalidArgumentException format:@ "Color stop of Gradient must be more than 2. We only have %i now." , __colorsCount];             if ( nil == [ self m_Gradient])      {          CGFloat *locati***** = malloc( sizeof (CGFloat)*__colorsCount);          for ( int i = 0; i < __colorsCount; i++)          {              locati*****[i] = [[m_Locati***** objectAtIndex:i] floatValue];          }          NSGradient *tempGradient = [[ NSGradient alloc] initWithColors:m_Colors                                                            atLocati*****:locati*****                                                              colorSpace:[ NSColorSpace deviceRGBColorSpace]];          [ self setM_Gradient:tempGradient];          [tempGradient release];          free(locati*****);      } }       - ( void ) addColor:( NSColor *) color andLocation:(CGFloat) location {      if ( nil == color)          [ NSException raise: NSInvalidArgumentException format:@ "The incoming color can't be nil" ];      if (location < 0.0f || location > 1.0f)          [ NSException raise: NSInvalidArgumentException format:@ "Location value should > 0.0f and < 1.0f. It can't be %f" , location];             [m_Colors insertObject:color atIndex:__colorsCount];      [m_Locati***** insertObject:[ NSNumber numberWithFloat:location] atIndex:__colorsCount];             __colorsCount ++; }    #pragma mark Accessors    - ( NSGradient *) m_Gradient {      return m_Gradient; }    - ( void ) setM_Gradient: ( NSGradient *) newValue {      [m_Gradient autorelease];      m_Gradient = [newValue retain]; }       - ( NSMutableArray *) m_Colors {      return m_Colors; }    - ( void ) setM_Colors: ( NSMutableArray *) newValue {      [m_Colors autorelease];      m_Colors = [newValue retain]; }       - ( NSMutableArray *) m_Locati***** {      return m_Locati*****; }    - ( void ) setM_Locati*****: ( NSMutableArray *) newValue {      [m_Locati***** autorelease];      m_Locati***** = [newValue retain]; }    @end

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2hHRitt36  

? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 #import <COCOA Cocoa.h> #import "KAGradientProtocol.h"    /*!      @class      @abstract    Factory class for gradient.      @discussion  This is a factory class which uses to create different gradient                   instance according os's version. */ @interface KAGradient : NSObject <KAGRADIENTPROTOCOL> {      id <KAGRADIENTPROTOCOL> m_TheGradient; }    - ( id <KAGRADIENTPROTOCOL>) theGradient; - ( void ) SetGradient:( id <KAGRADIENTPROTOCOL>)newGradient;    @end

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? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 #import "KAGradient.h" #import "_KAGradient.h" #import "_NSGradient.h"    @implementation KAGradient    #pragma mark Protocol Methods + ( id ) gradientWithStartingColor: ( NSColor *) startingColor                       endingColor: ( NSColor *) endingColor {      return [[[ self alloc] initWithStartingColor:startingColor endingColor:endingColor] autorelease]; }    - ( id ) initWithStartingColor: ( NSColor *) startingColor                   endingColor: ( NSColor *) endingColor {      if ( self = [ super init])      {          SInt32 minorVer, majorVer;          Gestalt(gestaltSystemVersionMajor, &majorVer);          Gestalt(gestaltSystemVersionMinor, &minorVer);                     // Leopard && Snow Leopard          if ((majorVer >= 10)&&(minorVer >= 5))          {              [ self SetGradient:[_NSGradient gradientWithStartingColor:startingColor endingColor:endingColor]];          }          // 10.4          else if ((majorVer == 10)&&(minorVer == 4) )          {              [ self SetGradient:[_KAGradient gradientWithStartingColor:startingColor endingColor:endingColor]];          }          // Error OS Version          else          {              [ NSException raise: NSInvalidArgumentException format:@ "You can't use gradient on this OS version. We only support 10.4 and later. You Max OS version is %i.%i" ,                majorVer, minorVer];          }      }      return self ; } - ( void ) addColorStop: ( NSColor *) stopColor             atPosition: (CGFloat) position {      [m_TheGradient addColorStop:stopColor atPosition:position]; }    - ( void ) drawFromPoint: ( NSPoint ) startingPoint                 toPoint: ( NSPoint ) endingPoint {      [m_TheGradient drawFromPoint:startingPoint toPoint:endingPoint]; }    - ( void ) drawFromCenter: ( NSPoint ) startingCenter                   radius: (CGFloat) startRadius                 toCenter: ( NSPoint ) endCenter                   radius: (CGFloat) endRadius {      [m_TheGradient drawFromCenter:startingCenter radius:startRadius toCenter:endCenter radius:endRadius]; }    - ( void ) drawInRect: ( NSRect ) rect                 angle: (CGFloat) angle {      [m_TheGradient drawInRect:rect angle:angle]; }    - ( void ) drawInBezierPath: ( NSBezierPath *) path                       angle: (CGFloat) angle {      [m_TheGradient drawInBezierPath:path angle:angle]; }    - ( void ) drawRadialInRect: ( NSRect ) rect {      [m_TheGradient drawRadialInRect:rect]; }    - ( void ) drawRadialInBezierPath: ( NSBezierPath *) path {      [m_TheGradient drawRadialInBezierPath:path]; }    - ( void ) dealloc {      [ self SetGradient: nil ];             [ super dealloc]; }    - ( id <KAGRADIENTPROTOCOL>) theGradient {      return m_TheGradient; } - ( void ) SetGradient:( id <KAGRADIENTPROTOCOL>)newGradient {      if (m_TheGradient != newGradient)      {          if (newGradient != nil && ![newGradient conformsToProtocol: @protocol (KAGradientProtocol)])          {              [ NSException raise: NSInvalidArgumentException format:@ "The %@ doesn't implement all methods in KAGradientProtocol." , newGradient];          }          [m_TheGradient release];          m_TheGradient = [newGradient retain];      } }    @end