iphone/ZXingWidget/ZXingWidgetController.m

   1 /**
   2  * Copyright 2009 Jeff Verkoeyen
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *    http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #import "ZXingWidgetController.h"
  18 #import "Decoder.h"
  19 #import "NSString+HTML.h"
  20 #import "ResultParser.h"
  21 #import "ParsedResult.h"
  22 #import "ResultAction.h"
  23 #include <sys/types.h>
  24 #include <sys/sysctl.h>
  25
  26 #define CAMERA_SCALAR 1.12412 // scalar = (480 / (2048 / 480))
  27 #define FIRST_TAKE_DELAY 1.0
  28
  29 CGImageRef UIGetScreenImage();
  30
  31 @implementation ZXingWidgetController
  32 @synthesize result, actions, showCancel, delegate;
  33
  34 - (id)initWithDelegate:(id<ZXingDelegate>)scanDelegate {
  35         if (self = [super init]) {
  36                 [self setDelegate:scanDelegate];
  37                 showCancel = true;
  38                 self.wantsFullScreenLayout = YES;
  39                 self.sourceType = UIImagePickerControllerSourceTypeCamera;
  40                 float zoomFactor = CAMERA_SCALAR;
  41                 if ([self fixedFocus]) {
  42                         zoomFactor *= 1.5;
  43                 }
  44                 self.cameraViewTransform = CGAffineTransformScale(
  45                                         self.cameraViewTransform, zoomFactor, zoomFactor);
  46                 overlayView = [[OverlayView alloc] initWithCancelEnabled:showCancel frame:[UIScreen mainScreen].bounds];
  47                 [overlayView setDelegate:self];
  48                 self.sourceType = UIImagePickerControllerSourceTypeCamera;
  49                 self.showsCameraControls = NO;
  50                 self.cameraOverlayView = overlayView;
  51                 self.allowsEditing = NO; // [[NSUserDefaults standardUserDefaults] boolForKey:@"allowEditing"];
  52         }
  53
  54         return self;
  55 }
  56
  57 - (void)dealloc {
  58         AudioServicesDisposeSystemSoundID(beepSound);
  59         [overlayView dealloc];
  60         [super dealloc];
  61 }
  62
  63 - (void)cancelled {
  64         NSLog(@"cancelled called in ZXingWidgetController");
  65         wasCancelled = true;
  66         if (delegate != nil) {
  67                 [delegate cancelled];
  68         }
  69 }
  70
  71 - (NSString *)getPlatform {
  72         size_t size;
  73     sysctlbyname("hw.machine", NULL, &size, NULL, 0);
  74     char *machine = malloc(size);
  75     sysctlbyname("hw.machine", machine, &size, NULL, 0);
  76     NSString *platform = [NSString stringWithCString:machine encoding:NSASCIIStringEncoding];
  77     free(machine);
  78         return platform;
  79 }
  80
  81 - (BOOL)fixedFocus {
  82         NSString *platform = [self getPlatform];
  83         if ([platform isEqualToString:@"iPhone1,1"] ||
  84                 [platform isEqualToString:@"iPhone1,2"]) return true;
  85         return false;
  86 }
  87
  88 - (void)viewDidLoad {
  89         [super viewDidLoad];
  90         NSBundle *mainBundle = [NSBundle mainBundle];
  91         OSStatus error = AudioServicesCreateSystemSoundID((CFURLRef)[NSURL fileURLWithPath:[mainBundle pathForResource:@"beep-beep" ofType:@"caf"] isDirectory:NO], &beepSound);
  92         if (error != kAudioServicesNoError) {
  93                 NSLog(@"Problem loading nearSound.caf");
  94         }
  95 }
  96
  97 - (void)viewDidAppear:(BOOL)animated {
  98     [super viewDidAppear:animated];
  99         [overlayView setPoints:nil];
 100         wasCancelled = false;
 101         [NSTimer scheduledTimerWithTimeInterval: FIRST_TAKE_DELAY
 102                                                                          target: self
 103                                                                    selector: @selector(takePicture:)
 104                                                                    userInfo: nil
 105                                                                         repeats: NO];
 106 }
 107
 108 - (void)takePicture:(NSTimer*)theTimer {
 109         CGImageRef capture = UIGetScreenImage();
 110         UIImage *scrn = [UIImage imageWithCGImage:CGImageCreateWithImageInRect(capture, [overlayView cropRect])];
 111         Decoder *d = [[Decoder alloc] init];
 112         d.delegate = self;
 113         CGRect cropRect = overlayView.cropRect;
 114         cropRect.origin.x = 0.0;
 115         cropRect.origin.y = 0.0;
 116         NSLog(@"crop rect %f, %f, %f, %f", cropRect.origin.x, cropRect.origin.y, cropRect.size.width, cropRect.size.height);
 117         [d decodeImage:scrn cropRect:cropRect];
 118 }
 119
 120 // DecoderDelegate methods
 121
 122 - (void)decoder:(Decoder *)decoder willDecodeImage:(UIImage *)image usingSubset:(UIImage *)subset{
 123         NSLog(@"DecoderViewController MessageWhileDecodingWithDimensions: Decoding image (%.0fx%.0f) ...", image.size.width, image.size.height);
 124 }
 125
 126 - (void)decoder:(Decoder *)decoder
 127   decodingImage:(UIImage *)image
 128     usingSubset:(UIImage *)subset
 129        progress:(NSString *)message {
 130         NSLog(@"decoding image %@", message);
 131 }
 132
 133 - (void)presentResultForString:(NSString *)resultString {
 134         NSLog(@"in presentResultForString()");
 135         self.result = [ResultParser parsedResultForString:resultString];
 136         AudioServicesPlaySystemSound(beepSound);
 137 #ifdef DEBUG
 138         NSLog(@"result string = %@", resultString);
 139         NSLog(@"result has %d actions", actions ? 0 : actions.count);
 140 #endif
 141         //      [self updateToolbar];
 142 }
 143
 144 - (void)presentResultPoints:(NSArray *)resultPoints
 145                    forImage:(UIImage *)image
 146                 usingSubset:(UIImage *)subset {
 147         // simply add the points to the image view
 148         NSLog(@"got points for display");
 149         [overlayView setPoints:resultPoints];
 150 }
 151
 152 - (void)decoder:(Decoder *)decoder didDecodeImage:(UIImage *)image usingSubset:(UIImage *)subset withResult:(TwoDDecoderResult *)twoDResult {
 153         //      [self presentResultForString:twoDResult.text];
 154         NSLog(@"decoded image!!");
 155         [self presentResultPoints:[twoDResult points] forImage:image usingSubset:subset];
 156         // now, in a selector, call the delegate to give this overlay time to show the points
 157         [self performSelector:@selector(alertDelegate:) withObject:[[twoDResult text] copy] afterDelay:1.0];
 158         decoder.delegate = nil;
 159         [decoder release];
 160 }
 161
 162 - (void)alertDelegate:(id)text {
 163         if (delegate != nil) {
 164                 [delegate scanResult:text];
 165         }
 166 }
 167
 168 - (void)decoder:(Decoder *)decoder failedToDecodeImage:(UIImage *)image usingSubset:(UIImage *)subset reason:(NSString *)reason {
 169         decoder.delegate = nil;
 170         [decoder release];
 171         [overlayView setPoints:nil];
 172         if (!wasCancelled) {
 173                 [self takePicture:nil];
 174         }
 175         //[self updateToolbar];
 176 }
 177
 178 @end