iphone/ZXing/Classes/DecoderViewController.m

   1 /*
   2  * Copyright 2008 Google Inc.
   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 //
  18 //  DecoderViewController.m
  19 //  ZXing
  20 //
  21 //  Created by Christian Brunschen on 31/03/2008.
  22 //
  23
  24 #import "DecoderViewController.h"
  25 #import "Decoder.h"
  26
  27 @implementation DecoderViewController
  28
  29 @synthesize imageView;
  30 @synthesize messageView;
  31 @synthesize decoder;
  32
  33 - (id)init
  34 {
  35     if (self = [super init]) {
  36         // Initialize your view controller.
  37         self.title = @"DecoderViewController";
  38
  39         Decoder *d = [[Decoder alloc] init];
  40         self.decoder = d;
  41         d.delegate = self;
  42         [d release];
  43     }
  44     return self;
  45 }
  46
  47
  48 - (void)loadView
  49 {
  50     [[NSBundle mainBundle] loadNibNamed:@"DecoderView" owner:self options:nil];
  51
  52     /* programmatically create the message view for now */
  53     // TODO(christian.brunschen): find a suitable & working IB configuration
  54     CGRect rect = [UIScreen mainScreen].applicationFrame;
  55     rect = CGRectInset(rect, CGRectGetWidth(rect)/4, CGRectGetHeight(rect)/3);
  56     rect.origin.y -= 50;
  57     UITextView *mView = [[UITextView alloc] initWithFrame:rect];
  58     mView.autoresizingMask = UIViewAutoresizingFlexibleHeight|UIViewAutoresizingFlexibleWidth;
  59     mView.text = @"Please take or select a picture containing a barcode";
  60     mView.backgroundColor = [UIColor yellowColor];
  61     mView.alpha = 0.7;
  62     [self.view addSubview:mView];
  63     self.messageView = mView;
  64     [mView release];
  65 }
  66
  67 - (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
  68 {
  69     // Return YES for supported orientations.
  70     return YES;
  71 }
  72
  73 - (void)didReceiveMemoryWarning
  74 {
  75     [super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview.
  76     // Release anything that's not essential, such as cached data.
  77 }
  78
  79 - (void)dealloc
  80 {
  81     [decoder release];
  82     [imageView release];
  83     [messageView release];
  84     [super dealloc];
  85 }
  86
  87
  88 // own methods
  89
  90 - (void)pickAndDecode {
  91     // Create the Image Picker
  92     UIImagePickerControllerSourceType sourceType =
  93     [UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]
  94     ? UIImagePickerControllerSourceTypeCamera
  95     : UIImagePickerControllerSourceTypePhotoLibrary;
  96
  97     UIImagePickerController* picker = [[UIImagePickerController alloc] init];
  98     picker.sourceType = sourceType;
  99     picker.delegate = self;
 100     picker.allowsImageEditing = YES;
 101
 102     // Picker is displayed asynchronously.
 103     [self presentModalViewController:picker animated:YES];
 104 }
 105
 106
 107 // DecoderDelegate methods
 108
 109 - (void)decoder:(Decoder *)decoder willDecodeImage:(UIImage *)image {
 110     [self.imageView setImage:image];
 111     self.messageView.text = [NSString stringWithFormat:@"Decoding image (%.0fx%.0f) ...", image.size.width, image.size.height];
 112 }
 113
 114 - (void)decoder:(Decoder *)decoder didDecodeImage:(UIImage *)image withResult:(NSString *)result {
 115     self.messageView.text = result;
 116 }
 117
 118
 119 // UIImagePickerControllerDelegate methods
 120
 121 - (void)imagePickerController:(UIImagePickerController *)picker
 122         didFinishPickingImage:(UIImage *)image
 123                   editingInfo:(NSDictionary *)editingInfo
 124 {
 125     [[picker parentViewController] dismissModalViewControllerAnimated:YES];
 126     [image retain];
 127     [picker release];
 128     [self.decoder decodeImage:image];
 129     [image release];
 130 }
 131
 132 - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
 133 {
 134     [picker dismissModalViewControllerAnimated:YES];
 135     [picker release];
 136 }
 137
 138
 139
 140 @end