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Text File  |  1992-12-08  |  2.5 KB  |  98 lines
  1. //------------------------------------------------------------------------------------------------
  2. //
  3. //    ImageWell
  4. //    
  5. //    Inherits From:    Control
  6. //
  7. //    Declared In:    ImageWell.h
  8. //
  9. //    Disclaimer
  10. //
  11. //        You may freely copy, distribute and reuse this software and its
  12. //        associated documentation. I disclaim any warranty of any kind, 
  13. //        expressed or implied, as to its fitness for any particular use.
  14. //
  15. //------------------------------------------------------------------------------------------------
  16. #import "ImageWell.h"
  17.  
  18.  
  19. @implementation ImageWell
  20.  
  21. //------------------------------------------------------------------------------------------------
  22. //    Initialization and Freeing
  23. //------------------------------------------------------------------------------------------------
  24. - initFrame: (const NXRect*) frameRect
  25. { 
  26.     [super initFrame:frameRect];
  27.     [self setCell: [[ActionCell allocFromZone:[self zone]] init]];
  28.         [self registerForDraggedTypes:&NXFilenamePboardType count:1];
  29.     return self;
  30. }
  31.  
  32.  
  33. - free
  34. {
  35.     if (image) [image free];
  36.     return [super free];
  37. }
  38.  
  39.  
  40. //------------------------------------------------------------------------------------------------
  41. //    Accessing Image
  42. //------------------------------------------------------------------------------------------------
  43. - image: anImage
  44. {
  45.     image = anImage;
  46.     [self update];
  47.     return self;
  48. }
  49.  
  50.  
  51. - image
  52. {
  53.     return image;
  54. }
  55.  
  56.  
  57. //------------------------------------------------------------------------------------------------
  58. //    Drawing
  59. //------------------------------------------------------------------------------------------------
  60. - drawSelf: (const NXRect *)rects :(int)count
  61. {
  62.     NXSetColor ([[self window] backgroundColor]);
  63.     NXRectFill (&bounds);
  64.     [image composite:NX_SOVER toPoint:&bounds.origin];
  65.     return self;
  66. }
  67.  
  68.  
  69. //------------------------------------------------------------------------------------------------
  70. //    Dragging
  71. //------------------------------------------------------------------------------------------------
  72. - (NXDragOperation) draggingEntered:dragSource
  73. {
  74.     return NX_DragOperationGeneric;
  75. }
  76.  
  77.  
  78. - (BOOL) performDragOperation:dragSource
  79. {
  80.     id     pasteboard = [dragSource draggingPasteboard];
  81.  
  82.     if ([NXImage canInitFromPasteboard: pasteboard] == NO) return NO;
  83.     
  84.     image = [[NXImage allocFromZone: [self zone]] initFromPasteboard: pasteboard];
  85.     [[image setScalable: YES] setSize: &frame.size];
  86.     return (image ? YES : NO);
  87. }
  88.  
  89.  
  90. - concludeDragOperation:dragSource
  91. {
  92.     [[self target] perform:[self action] with:self];
  93.     [self display];
  94.     return self;
  95. }
  96.  
  97.  
  98. @end