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Annotation of Examples/AppKit/ScrollDoodScroll/PostScriptView.m, revision 1.1

1.1     ! root        1: // PostScriptView.m
        !             2: // By Jayson Adams, NeXT Developer Support Team
        !             3: // You may freely copy, distribute and reuse the code in this example.
        !             4: // NeXT disclaims any warranty of any kind, expressed or implied, as to its
        !             5: // fitness for any particular use.
        !             6: 
        !             7: #import <dpsclient/psops.h>
        !             8: #import <appkit/NXImage.h>
        !             9: 
        !            10: #import "PostScriptView.h"
        !            11: 
        !            12: @implementation PostScriptView
        !            13: 
        !            14: 
        !            15: /* instance methods */
        !            16: 
        !            17: - initFrame:(const NXRect *)frameRect
        !            18: {
        !            19:     [super initFrame:frameRect];
        !            20: 
        !            21:   /*
        !            22:    * create an nximage to hold the PostScript image contained in our MachO
        !            23:    * segment, created by Makefile.preamble; we'll "draw" by compositing the
        !            24:    * resulting bits into ourself.  By making the image scalable, we can scale
        !            25:    * the bitmap image by changing our nximage's size
        !            26:    */
        !            27: 
        !            28:     postscriptImage = [[[NXImage alloc] initFromSection:"SampleImage"]
        !            29:                                                             setScalable:YES];
        !            30:     
        !            31:     return self;
        !            32: }
        !            33:     
        !            34: - free
        !            35: {
        !            36:     [postscriptImage free];
        !            37:     
        !            38:     return [super free];
        !            39: }
        !            40: 
        !            41: - scale:(float)factor
        !            42: {
        !            43:     NXSize     aSize;
        !            44: 
        !            45:   /*
        !            46:    * if we resize the nximage, it will reexcute the PostScript
        !            47:    * image with the new scale factor (resulting in a bitmap image that's
        !            48:    * larger or smaller than before)
        !            49:    */
        !            50:     [postscriptImage getSize:&aSize];
        !            51:     aSize.width *= factor;
        !            52:     aSize.height *= factor;
        !            53:     [postscriptImage setSize:&aSize];
        !            54: 
        !            55:     aSize.width = NX_WIDTH(&bounds) * factor;
        !            56:     aSize.height = NX_HEIGHT(&bounds) * factor;
        !            57:     [self sizeTo:aSize.width :aSize.height];
        !            58:    
        !            59:   /* show the new image */
        !            60:     [self display];
        !            61:     
        !            62:     return self;
        !            63: }
        !            64: 
        !            65: - drawSelf:(const NXRect *)rects :(int)rectCount
        !            66: {
        !            67:   /* erase update rect since the nximage might be smaller than our bounds */
        !            68:     PSsetgray(NX_WHITE);
        !            69:     NXRectFill(&(rects[0]));
        !            70:     
        !            71:   /*
        !            72:    * copy the bits from the nximage into ourself;  note that we need not check
        !            73:    * to see if we're printing since the nximage will do the right thing (i.e.
        !            74:    * spit out PostScript) if we are
        !            75:    */
        !            76:     
        !            77:     [postscriptImage composite:NX_SOVER
        !            78:                     fromRect:&(rects[0])
        !            79:                     toPoint:&(rects[0].origin)];
        !            80:     
        !            81:     return self;
        !            82: }
        !            83: 
        !            84: @end

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