CCDProgressIndicator

CCDProgressIndicator is a simple subclass for drawing rounded progress bars.

// CCDProgressIndicator.h #import <AppKit/AppKit.h>

typedef enum { CCDProgressIndicatorSquareBezel = NSTextFieldSquareBezel, CCDProgressIndicatorRoundedBezel = NSTextFieldRoundedBezel } CCDProgressIndicatorBezelStyle;

@interface CCDProgressIndicator : NSProgressIndicator { NSTextFieldCell *textCell; NSImage *scratch; }

(void)setBezelStyle:(CCDProgressIndicatorBezelStyle)style;
(CCDProgressIndicatorBezelStyle)bezelStyle; @end

// CCDProgressIndicator.m #import “CCDProgressIndicator.h”

@implementation CCDProgressIndicator

(id)initWithCoder:(NSCoder*)coder { self = [super initWithCoder:coder]; if (self) { [self setBezeled:YES]; textCell = [[NSTextFieldCell alloc] initTextCell:@””]; [textCell setControlSize:[self controlSize]]; [textCell setDrawsBackground:NO]; [textCell setBezeled:YES];

  scratch = [[NSImage alloc] initWithSize:[self bounds].size];
  [scratch setFlipped:YES];

  // yuck.
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(setNeedsDisplay:) name:NSWindowDidBecomeMainNotification object:[self window]];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(setNeedsDisplay:) name:NSWindowDidResignMainNotification object:[self window]];   }

return self; }

(void)dealloc { [[NSNotificationCenter defaultCenter] removeObserver:self]; [textCell release]; [scratch release]; [super dealloc]; }
(void)setBezelStyle:(CCDProgressIndicatorBezelStyle)style { [textCell setBezelStyle:style]; [self setNeedsDisplay:YES]; }
(CCDProgressIndicatorBezelStyle)bezelStyle { return [textCell bezelStyle]; }
(void)drawRect:(NSRect)rect { if ([self bezelStyle] == NSTextFieldRoundedBezel && [self style] == NSProgressIndicatorBarStyle) { NSImage *progress = [[NSImage alloc] initWithSize:rect.size]; NSImage *textImage = [progress copy]; NSRect tRect = rect; tRect.origin.x += 2; tRect.size.width -= 4; tRect.size.height -= 4;

[progress setFlipped:YES]; [textImage setFlipped:YES];

[textImage lockFocus]; [textCell drawWithFrame:rect inView:[NSView focusView]]; [textImage unlockFocus];

[progress lockFocus]; [super drawRect:rect]; [progress unlockFocus];

[scratch setSize:rect.size]; [scratch lockFocus]; [[NSColor whiteColor] set]; NSRectFill(rect); // clear scratch of any previous drawing [progress drawAtPoint:NSMakePoint(0,0) fromRect:tRect operation:NSCompositeSourceOver fraction:0.8]; [textImage drawAtPoint:NSMakePoint(0,0) fromRect:rect operation:NSCompositeDestinationAtop fraction:1];

[scratch unlockFocus];

// draw it all [scratch drawAtPoint:NSMakePoint(0,0) fromRect:rect operation:NSCompositeSourceOver fraction:1]; [progress release]; [textImage release]; } else [super drawRect:rect]; }

@end

1/16; Don’t know how I overlooked it but scratch wasn’t being cleared before, now it is.

4/8; CCDImageCategory wasn’t needed, as described on its page.

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