RVBook.mm

   1 #import "RVBook.h"
   2
   3 #import <UIKit/UINavigationBar.h>
   4 #import <UIKit/UINavigationItem.h>
   5
   6 #import <UIKit/UITransitionView.h>
   7
   8 #import <UIKit/UIView-Geometry.h>
   9 #import <UIKit/UIView-Hierarchy.h>
  10
  11 #import "RVPage.h"
  12
  13 @implementation RVBook
  14
  15 - (void) dealloc {
  16     [navbar_ setDelegate:nil];
  17
  18     [pages_ release];
  19     [navbar_ release];
  20     [transition_ release];
  21     [super dealloc];
  22 }
  23
  24 - (void) navigationBar:(UINavigationBar *)navbar buttonClicked:(int)button {
  25     _assert([pages_ count] != 0);
  26     RVPage *page = [pages_ lastObject];
  27     switch (button) {
  28         case 0: [page _rightButtonClicked]; break;
  29         case 1: [page _leftButtonClicked]; break;
  30     }
  31 }
  32
  33 - (void) navigationBar:(UINavigationBar *)navbar poppedItem:(UINavigationItem *)item {
  34     _assert([pages_ count] != 0);
  35     if (!resetting_)
  36         [[pages_ lastObject] setPageActive:NO];
  37     [pages_ removeLastObject];
  38     if (!resetting_)
  39         [self resetViewAnimated:YES toPage:[pages_ lastObject]];
  40 }
  41
  42 - (id) initWithFrame:(CGRect)frame {
  43     if ((self = [super initWithFrame:frame]) != nil) {
  44         pages_ = [[NSMutableArray arrayWithCapacity:4] retain];
  45
  46         struct CGRect bounds = [self bounds];
  47         CGSize navsize = [UINavigationBar defaultSizeWithPrompt];
  48         CGRect navrect = {{0, 0}, navsize};
  49
  50         navbar_ = [[UINavigationBar alloc] initWithFrame:navrect];
  51         [self addSubview:navbar_];
  52
  53         [navbar_ setBarStyle:1];
  54         [navbar_ setDelegate:self];
  55
  56         [navbar_ setPrompt:@""];
  57
  58         transition_ = [[UITransitionView alloc] initWithFrame:CGRectMake(
  59             bounds.origin.x, bounds.origin.y + navsize.height, bounds.size.width, bounds.size.height - navsize.height
  60         )];
  61
  62         [self addSubview:transition_];
  63     } return self;
  64 }
  65
  66 - (void) setDelegate:(id)delegate {
  67     delegate_ = delegate;
  68 }
  69
  70 - (void) setPage:(RVPage *)page {
  71     if ([pages_ count] != 0)
  72         [[pages_ lastObject] setPageActive:NO];
  73
  74     [navbar_ disableAnimation];
  75     resetting_ = true;
  76     for (unsigned i(0), pages([pages_ count]); i != pages; ++i)
  77         [navbar_ popNavigationItem];
  78     resetting_ = false;
  79
  80     [self pushPage:page];
  81     [navbar_ enableAnimation];
  82 }
  83
  84 - (void) pushPage:(RVPage *)page {
  85     if ([pages_ count] != 0)
  86         [[pages_ lastObject] setPageActive:NO];
  87
  88     NSString *title = [self getTitleForPage:page];
  89
  90     NSString *backButtonTitle = [page backButtonTitle];
  91     if (backButtonTitle == nil)
  92         backButtonTitle = title;
  93
  94     UINavigationItem *navitem = [[[UINavigationItem alloc] initWithTitle:title] autorelease];
  95     [navitem setBackButtonTitle:backButtonTitle];
  96     [navbar_ pushNavigationItem:navitem];
  97
  98     BOOL animated = [pages_ count] == 0 ? NO : YES;
  99     [transition_ transition:(animated ? 1 : 0) toView:page];
 100     [page setPageActive:YES];
 101
 102     [pages_ addObject:page];
 103     [self reloadButtonsForPage:page];
 104
 105     [navbar_ setAccessoryView:[page accessoryView] animate:animated goingBack:NO];
 106 }
 107
 108 - (void) popPages:(unsigned)pages {
 109     if (pages == 0)
 110         return;
 111
 112     [[pages_ lastObject] setPageActive:NO];
 113
 114     resetting_ = true;
 115     for (unsigned i(0); i != pages; ++i)
 116         [navbar_ popNavigationItem];
 117     resetting_ = false;
 118
 119     [self resetViewAnimated:YES toPage:[pages_ lastObject]];
 120 }
 121
 122 - (void) setPrompt:(NSString *)prompt {
 123     [navbar_ setPrompt:prompt];
 124 }
 125
 126 - (void) resetViewAnimated:(BOOL)animated {
 127     resetting_ = true;
 128
 129     if ([pages_ count] > 1) {
 130         [navbar_ disableAnimation];
 131         while ([pages_ count] != (animated ? 2 : 1))
 132             [navbar_ popNavigationItem];
 133         [navbar_ enableAnimation];
 134         if (animated)
 135             [navbar_ popNavigationItem];
 136     }
 137
 138     resetting_ = false;
 139
 140     [self resetViewAnimated:animated toPage:[pages_ lastObject]];
 141 }
 142
 143 - (void) resetViewAnimated:(BOOL)animated toPage:(RVPage *)page {
 144     [page resetViewAnimated:animated];
 145     [transition_ transition:(animated ? 2 : 0) toView:page];
 146     [page setPageActive:YES];
 147     [self reloadButtonsForPage:page];
 148     [navbar_ setAccessoryView:[page accessoryView] animate:animated goingBack:YES];
 149 }
 150
 151 - (void) setTitle:(NSString *)title forPage:(RVPage *)page {
 152     if ([pages_ count] == 0 || page != [pages_ lastObject])
 153         return;
 154     UINavigationItem *navitem = [navbar_ topItem];
 155     [navitem setTitle:title];
 156 }
 157
 158 - (void) setBackButtonTitle:(NSString *)title forPage:(RVPage *)page {
 159     if ([pages_ count] == 0 || page != [pages_ lastObject])
 160         return;
 161     UINavigationItem *navitem = [navbar_ topItem];
 162     [navitem setBackButtonTitle:title];
 163 }
 164
 165 - (void) reloadButtonsForPage:(RVPage *)page {
 166     if ([pages_ count] == 0 || page != [pages_ lastObject])
 167         return;
 168     NSString *leftButtonTitle([pages_ count] == 1 ? [page leftButtonTitle] : nil);
 169     [navbar_ showButtonsWithLeftTitle:leftButtonTitle rightTitle:[page rightButtonTitle]];
 170 }
 171
 172 - (NSString *) getTitleForPage:(RVPage *)page {
 173     return [page title];
 174 }
 175
 176 - (void) reloadData {
 177     for (int i(0), e([pages_ count]); i != e; ++i) {
 178         RVPage *page([pages_ objectAtIndex:(e - i - 1)]);
 179         [page reloadData];
 180     }
 181 }
 182
 183 - (CGRect) pageBounds {
 184     return [transition_ bounds];
 185 }
 186
 187 @end