Joshua Moerman
11 years ago
8 changed files with 222 additions and 48 deletions
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//
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// Ruler.h
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// SpectogramPrototype
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//
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// Created by Joshua Moerman on 25/02/14.
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// Copyright (c) 2014 Joshua Moerman. All rights reserved.
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//
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#import <UIKit/UIKit.h> |
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typedef struct Interval { |
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CGFloat begin; |
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CGFloat end; |
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} Interval; |
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@interface AbstractRuler : UIView |
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@property (nonatomic) Interval visibleInterval; |
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@end |
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@interface HorizontalRuler : AbstractRuler |
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@end |
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@interface VerticalRuler : AbstractRuler |
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@end |
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// |
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// Ruler.m |
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// SpectogramPrototype |
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// |
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// Created by Joshua Moerman on 25/02/14. |
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// Copyright (c) 2014 Joshua Moerman. All rights reserved. |
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// |
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#import "Ruler.h" |
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#import "UIScreen+Util.h" |
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@implementation AbstractRuler |
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@synthesize visibleInterval; |
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- (void)setVisibleInterval:(Interval)visible_interval_{ |
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if (visibleInterval.begin != visible_interval_.begin || visibleInterval.end != visible_interval_.end) { |
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[self setNeedsDisplay]; |
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visibleInterval = visible_interval_; |
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} |
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} |
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@end |
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@implementation HorizontalRuler |
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- (void)drawRect:(CGRect) __unused rect{ |
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[[UIColor grayColor] setFill]; |
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UIRectFill(self.bounds); |
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const Interval visibleInterval = self.visibleInterval; |
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if(visibleInterval.end <= visibleInterval.begin) return; |
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const CGFloat f = 60 * 44100.0 / 4096.0; |
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const CGFloat start = f * ceil(visibleInterval.begin / f); |
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const CGFloat d = visibleInterval.end - visibleInterval.begin; |
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const int n = (int)floor(d / f) + 1; |
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for(int i = 0; i < n; ++i){ |
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const CGFloat x = start + i * f; |
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const CGFloat r = (x - visibleInterval.begin) / d; |
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const CGFloat gx = r * self.bounds.size.width; |
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[[UIColor blackColor] setFill]; |
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if([UIScreen isRetinaDisplay]){ |
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UIRectFill(CGRectMake(gx, 0, 0.5, self.bounds.size.height)); |
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} else { |
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UIRectFill(CGRectMake(gx, 0, 1.0, self.bounds.size.height)); |
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} |
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NSString* string = [NSString stringWithFormat:@"%.0f:00", x/f]; |
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NSMutableParagraphStyle* style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy]; |
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style.alignment = NSTextAlignmentCenter; |
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UIFont* font = [UIFont boldSystemFontOfSize:14]; |
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[string drawInRect:CGRectMake(gx-50, 20, 100, self.bounds.size.height-20) |
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withAttributes:@{NSParagraphStyleAttributeName: style, |
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NSFontAttributeName: font}]; |
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} |
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} |
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@end |
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@implementation VerticalRuler |
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- (UIColor*)colorForKey:(int)j{ |
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switch (j) { |
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case 0: |
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return [UIColor redColor]; |
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case 2: |
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case 3: |
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case 5: |
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case 7: |
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case 8: |
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case 10: |
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return [UIColor whiteColor]; |
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default: |
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return [UIColor blackColor]; |
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} |
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} |
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- (void)drawRect:(CGRect) __unused rect{ |
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[[UIColor grayColor] setFill]; |
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UIRectFill(self.bounds); |
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const Interval visibleInterval = self.visibleInterval; |
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if(visibleInterval.end <= visibleInterval.begin) return; |
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const CGFloat d = visibleInterval.end - visibleInterval.begin; |
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const CGFloat f = 44100; |
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const CGFloat N = 1 << 12; |
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const CGFloat height = (1 << 12) >> 3; |
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for(int i = 220; i < 44100/8; i *= 2){ |
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for(int j = 0; j < 12; ++j){ |
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const CGFloat k = i * pow(2, j/12.0); |
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const CGFloat y = N*k/f; |
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const CGFloat y2 = (height - y); |
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const CGFloat gy = 1024 * (y2 - visibleInterval.begin) / d; |
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[[self colorForKey:j] setFill]; |
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if([UIScreen isRetinaDisplay]){ |
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UIRectFill(CGRectMake(0, gy-0.5, self.bounds.size.width, 1.0)); |
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} else { |
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UIRectFill(CGRectMake(0, gy-1, self.bounds.size.width, 2.0)); |
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} |
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} |
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} |
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} |
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@end |
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@ -0,0 +1,15 @@ |
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//
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// UIScreen+Util.h
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// SpectogramPrototype
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//
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// Created by Joshua Moerman on 25/02/14.
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// Copyright (c) 2014 Joshua Moerman. All rights reserved.
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//
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#import <UIKit/UIKit.h> |
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@interface UIScreen (Util) |
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+ (BOOL) isRetinaDisplay; |
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@end |
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@ -0,0 +1,27 @@ |
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// |
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// UIScreen+Util.m |
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// SpectogramPrototype |
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// |
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// Created by Joshua Moerman on 25/02/14. |
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// Copyright (c) 2014 Joshua Moerman. All rights reserved. |
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// |
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#import "UIScreen+Util.h" |
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@implementation UIScreen (Util) |
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// from http://stackoverflow.com/questions/3504173/detect-retina-display |
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+ (BOOL) isRetinaDisplay { |
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static BOOL retina = NO; |
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static BOOL alreadyChecked = NO; |
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if (!alreadyChecked) { |
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UIScreen *mainScreen = self.mainScreen; |
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if (mainScreen) { |
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retina = mainScreen.scale > 1.0; |
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alreadyChecked = YES; |
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} |
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} |
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return retina; |
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} |
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@end |
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