Make Calendar localizable

Examples/NativeCal/Classes/NativeCalAppDelegate.m

@@ -23,7 +23,8 @@ - (void)applicationDidFinishLaunching:(UIApplication *)application
    * If your application requires an arbitrary starting date, use -[KalViewController initWithSelectedDate:]
    * instead of -[KalViewController init].
    */
-  kal = [[KalViewController alloc] init];
+  NSLocale *locale = [[[NSLocale alloc] initWithLocaleIdentifier:@"zh-HK"] autorelease];
+  kal = [[KalViewController alloc] initWithLocale:locale];
   kal.title = @"NativeCal";
 
   /*

src/KalGridView.m

@@ -49,8 +49,8 @@ - (id)initWithFrame:(CGRect)frame logic:(KalLogic *)theLogic delegate:(id<KalVie
     delegate = theDelegate;
 
     CGRect monthRect = CGRectMake(0.f, 0.f, frame.size.width, frame.size.height);
-    frontMonthView = [[KalMonthView alloc] initWithFrame:monthRect];
-    backMonthView = [[KalMonthView alloc] initWithFrame:monthRect];
+    frontMonthView = [[KalMonthView alloc] initWithFrame:monthRect logic:theLogic];
+    backMonthView = [[KalMonthView alloc] initWithFrame:monthRect logic:theLogic];
     backMonthView.hidden = YES;
     [self addSubview:backMonthView];
     [self addSubview:frontMonthView];

src/KalLogic.h

@@ -31,6 +31,7 @@
   NSDateFormatter *monthAndYearFormatter;
 }
 
+@property (nonatomic, retain, readonly) NSLocale *locale;
 @property (nonatomic, retain) NSDate *baseDate;    // The first day of the currently selected month
 @property (nonatomic, retain, readonly) NSDate *fromDate;  // The date corresponding to the tile in the upper-left corner of the currently selected month
 @property (nonatomic, retain, readonly) NSDate *toDate;    // The date corresponding to the tile in the bottom-right corner of the currently selected month
@@ -40,6 +41,7 @@
 @property (nonatomic, readonly) NSString *selectedMonthNameAndYear; // localized (e.g. "September 2010" for USA locale)
 
 - (id)initForDate:(NSDate *)date; // designated initializer.
+- (id)initForDate:(NSDate *)date locale:(NSLocale *)theLocale;
 
 - (void)retreatToPreviousMonth;
 - (void)advanceToFollowingMonth;

src/KalLogic.m

@@ -13,6 +13,7 @@ - (void)recalculateVisibleDays;
 - (NSUInteger)numberOfDaysInPreviousPartialWeek;
 - (NSUInteger)numberOfDaysInFollowingPartialWeek;
 
+@property (nonatomic, retain) NSLocale *locale;
 @property (nonatomic, retain) NSDate *fromDate;
 @property (nonatomic, retain) NSDate *toDate;
 @property (nonatomic, retain) NSArray *daysInSelectedMonth;
@@ -23,7 +24,7 @@ - (NSUInteger)numberOfDaysInFollowingPartialWeek;
 
 @implementation KalLogic
 
-@synthesize baseDate, fromDate, toDate, daysInSelectedMonth, daysInFinalWeekOfPreviousMonth, daysInFirstWeekOfFollowingMonth;
+@synthesize locale, baseDate, fromDate, toDate, daysInSelectedMonth, daysInFinalWeekOfPreviousMonth, daysInFirstWeekOfFollowingMonth;
 
 + (NSSet *)keyPathsForValuesAffectingSelectedMonthNameAndYear
 {
@@ -32,12 +33,20 @@ + (NSSet *)keyPathsForValuesAffectingSelectedMonthNameAndYear
 
 - (id)initForDate:(NSDate *)date
 {
-  if ((self = [super init])) {
-    monthAndYearFormatter = [[NSDateFormatter alloc] init];
-    [monthAndYearFormatter setDateFormat:@"LLLL yyyy"];
-    [self moveToMonthForDate:date];
-  }
-  return self;
+    return [self initForDate:date locale:nil];
+}
+
+- (id)initForDate:(NSDate *)date locale:(NSLocale *)theLocale
+{
+    if ((self = [super init])) {
+        self.locale = theLocale;
+        NSString *format = [NSDateFormatter dateFormatFromTemplate:@"MMMM yyyy" options:0 locale:theLocale];        
+        monthAndYearFormatter = [[NSDateFormatter alloc] init];
+        [monthAndYearFormatter setDateFormat:format];
+        [monthAndYearFormatter setLocale:theLocale];
+        [self moveToMonthForDate:date];
+    }
+    return self;
 }
 
 - (id)init
@@ -63,7 +72,7 @@ - (void)advanceToFollowingMonth
 
 - (NSString *)selectedMonthNameAndYear;
 {
-  return [monthAndYearFormatter stringFromDate:self.baseDate];
+    return [monthAndYearFormatter stringFromDate:self.baseDate];
 }
 
 #pragma mark Low-level implementation details

src/KalMonthView.h

@@ -5,6 +5,8 @@
 
 #import <UIKit/UIKit.h>
 
+#import "KalLogic.h"
+
 @class KalTileView, KalDate;
 
 @interface KalMonthView : UIView
@@ -16,6 +18,8 @@
 @property (nonatomic) NSUInteger numWeeks;
 
 - (id)initWithFrame:(CGRect)rect; // designated initializer
+- (id)initWithFrame:(CGRect)rect logic:(KalLogic *)logic;
+
 - (void)showDates:(NSArray *)mainDates leadingAdjacentDates:(NSArray *)leadingAdjacentDates trailingAdjacentDates:(NSArray *)trailingAdjacentDates;
 - (KalTileView *)firstTileOfMonth;
 - (KalTileView *)tileForDate:(KalDate *)date;

src/KalMonthView.m

@@ -16,21 +16,28 @@ @implementation KalMonthView
 
 @synthesize numWeeks;
 
-- (id)initWithFrame:(CGRect)frame
+- (id)initWithFrame:(CGRect)rect logic:(KalLogic *)logic
 {
-  if ((self = [super initWithFrame:frame])) {
-    tileAccessibilityFormatter = [[NSDateFormatter alloc] init];
-    [tileAccessibilityFormatter setDateFormat:@"EEEE, MMMM d"];
-    self.opaque = NO;
-    self.clipsToBounds = YES;
-    for (int i=0; i<6; i++) {
-      for (int j=0; j<7; j++) {
-        CGRect r = CGRectMake(j*kTileSize.width, i*kTileSize.height, kTileSize.width, kTileSize.height);
-        [self addSubview:[[[KalTileView alloc] initWithFrame:r] autorelease]];
-      }
+    if ((self = [super initWithFrame:rect])) {
+        NSString *format = [NSDateFormatter dateFormatFromTemplate:@"EEEE, MMM d" options:0 locale:logic.locale];
+        tileAccessibilityFormatter = [[NSDateFormatter alloc] init];
+        [tileAccessibilityFormatter setDateFormat:format];
+        [tileAccessibilityFormatter setLocale:logic.locale];
+        self.opaque = NO;
+        self.clipsToBounds = YES;
+        for (int i=0; i<6; i++) {
+            for (int j=0; j<7; j++) {
+                CGRect r = CGRectMake(j*kTileSize.width, i*kTileSize.height, kTileSize.width, kTileSize.height);
+                [self addSubview:[[[KalTileView alloc] initWithFrame:r] autorelease]];
+            }
+        }
     }
-  }
-  return self;
+    return self;
+}
+
+- (id)initWithFrame:(CGRect)frame
+{
+    return [self initWithFrame:frame logic:nil];
 }
 
 - (void)showDates:(NSArray *)mainDates leadingAdjacentDates:(NSArray *)leadingAdjacentDates trailingAdjacentDates:(NSArray *)trailingAdjacentDates

src/KalView.m

@@ -126,8 +126,11 @@ - (void)addSubviewsToHeaderView:(UIView *)headerView
   [nextMonthButton release];
 
   // Add column labels for each weekday (adjusting based on the current locale's first weekday)
-  NSArray *weekdayNames = [[[[NSDateFormatter alloc] init] autorelease] shortWeekdaySymbols];
-  NSArray *fullWeekdayNames = [[[[NSDateFormatter alloc] init] autorelease] standaloneWeekdaySymbols];
+  NSDateFormatter *df = [[NSDateFormatter alloc] init];
+  [df setLocale:logic.locale];
+  NSArray *weekdayNames = [df shortWeekdaySymbols];
+  NSArray *fullWeekdayNames = [df standaloneWeekdaySymbols];
+  [df release];
   NSUInteger firstWeekday = [[NSCalendar currentCalendar] firstWeekday];
   NSUInteger i = firstWeekday - 1;
   for (CGFloat xOffset = 0.f; xOffset < headerView.width; xOffset += 46.f, i = (i+1)%7) {

src/KalViewController.h

@@ -35,6 +35,10 @@
 @property (nonatomic, retain, readonly) NSDate *selectedDate;
 
 - (id)initWithSelectedDate:(NSDate *)selectedDate;  // designated initializer. When the calendar is first displayed to the user, the month that contains 'selectedDate' will be shown and the corresponding tile for 'selectedDate' will be automatically selected.
+
+- (id)initWithSelectedDate:(NSDate *)date locale:(NSLocale *)locale;
+- (id)initWithLocale:(NSLocale *)locale;
+
 - (void)reloadData;                                 // If you change the KalDataSource after the KalViewController has already been displayed to the user, you must call this method in order for the view to reflect the new data.
 - (void)showAndSelectDate:(NSDate *)date;           // Updates the state of the calendar to display the specified date's month and selects the tile for that date.
 

src/KalViewController.m

@@ -40,16 +40,26 @@ @implementation KalViewController
 
 @synthesize dataSource, delegate, initialDate, selectedDate;
 
+- (id)initWithSelectedDate:(NSDate *)date locale:(NSLocale *)locale
+{
+    if ((self = [super init])) {
+        logic = [[KalLogic alloc] initForDate:date locale:locale];
+        self.initialDate = date;
+        self.selectedDate = date;
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(significantTimeChangeOccurred) name:UIApplicationSignificantTimeChangeNotification object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reloadData) name:KalDataSourceChangedNotification object:nil];
+    }
+    return self;
+}
+
 - (id)initWithSelectedDate:(NSDate *)date
 {
-  if ((self = [super init])) {
-    logic = [[KalLogic alloc] initForDate:date];
-    self.initialDate = date;
-    self.selectedDate = date;
-    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(significantTimeChangeOccurred) name:UIApplicationSignificantTimeChangeNotification object:nil];
-    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(reloadData) name:KalDataSourceChangedNotification object:nil];
-  }
-  return self;
+    return [self initWithSelectedDate:date locale:nil];
+}
+
+- (id)initWithLocale:(NSLocale *)locale
+{
+    return [self initWithSelectedDate:[NSDate date] locale:locale];
 }
 
 - (id)init