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An expansion of `datepanel.m` that displays synchronized date pickers in a modal dialogue using undocumented methods in Mac OS X Tiger.
#import <Cocoa/Cocoa.h>
// (C)2018 Cameron Kaiser. BSD license.
// gcc -o doubledate doubledate.m -framework Cocoa
// 10.4 does not have an accessory view method for NSAlert, but we can
// simulate it with these undocumented methods.
@interface NSAlert(WithCustomStyle)
- (void)prepare;
- (id)buildAlertStyle:(int)fp8 title:(id)fp12 formattedMsg:(id)fp16 first:(id)fp20 second:(id)fp24 third:(id)fp28 oldStyle:(BOOL)fp32;
- (id)buildAlertStyle:(int)fp8 title:(id)fp12 message:(id)fp16 first:(id)fp20 second:(id)fp24 third:(id)fp28 oldStyle:(BOOL)fp32 args:(char *)fp36;
@end
@class NSDoubleDatePicker;
@interface NSDoubleDateDelegate : NSObject {
NSDoubleDatePicker *_parentAlert;
NSDatePicker *_source;
}
- (void)datePickerCell:(NSDatePickerCell *)aDatePickerCell
validateProposedDateValue:(NSDate **)proposedDateValue
timeInterval:(NSTimeInterval *)proposedTimeInterval;
- (void)setParentAlert:(NSDoubleDatePicker *)parentAlert
withSource:(NSDatePicker *)source;
@end
@implementation NSDoubleDateDelegate
- (void)datePickerCell:(NSDatePickerCell *)aDatePickerCell
validateProposedDateValue:(NSDate **)proposedDateValue
timeInterval:(NSTimeInterval *)proposedTimeInterval
{
NSLog(@"validate");
[_parentAlert onSwitchControl:_source newDate:proposedDateValue];
}
- (void)setParentAlert:(NSDoubleDatePicker *)parentAlert
withSource:(NSDatePicker *)source
{
_parentAlert = parentAlert;
_source = source;
}
@end
////// NSDoubleDatePicker
////// based on NSAlertCheckbox, http://cocoadev.github.io/NSAlertCheckbox/
@interface NSDoubleDatePicker : NSAlert {
NSDatePicker *_pickertop;
NSDatePicker *_pickerbottom;
NSDoubleDateDelegate *_topdelegate;
NSDoubleDateDelegate *_bottomdelegate;
}
- (void)dealloc;
- (NSDoubleDatePicker *)datePicker:(NSString *)message
defaultButton:(NSString *)defaultButton
alternateButton:(NSString *)alternateButton
otherButton:(NSString *)otherButton
informativeTextWithFormat:(NSString *)format;
- (void)onSwitchControl:(NSDatePicker *)which newDate:(NSDate **)newDate;
- (NSDate *)date;
- (void)setDate:(NSDate *)date;
@end
@interface NSDoubleDatePicker(Private)
- (void)_ensureDatePickers;
- (void)_addDatePickersToAlert;
@end
@implementation NSDoubleDatePicker
- (void)dealloc
{
// NSLog(@"dealloc");
[_pickertop release];
[_pickerbottom release];
[_topdelegate release];
[_bottomdelegate release];
[super dealloc];
}
- (NSDoubleDatePicker *)datePicker:(NSString *)message
defaultButton:(NSString *)defaultButton
alternateButton:(NSString *)alternateButton
otherButton:(NSString *)otherButton
informativeTextWithFormat:(NSString *)format
{
NSAlert *alert = [super alertWithMessageText:message
defaultButton:defaultButton
alternateButton:alternateButton
otherButton:otherButton
informativeTextWithFormat:format];
return (NSDoubleDatePicker *)alert;
}
- (id)buildAlertStyle:(int)fp8
title:(id)fp12
formattedMsg:(id)fp16
first:(id)fp20
second:(id)fp24
third:(id)fp28
oldStyle:(BOOL)fp32
{
// NSLog(@"buildAlertStyle 1");
id rv = [super buildAlertStyle:fp8
title:fp12
formattedMsg:fp16
first:fp20
second:fp24
third:fp28
oldStyle:fp32];
[self _addDatePickersToAlert];
return rv;
}
- (id)buildAlertStyle:(int)fp8
title:(id)fp12
message:(id)fp16
first:(id)fp20
second:(id)fp24
third:(id)fp28
oldStyle:(BOOL)fp32
args:(char *)fp36
{
// NSLog(@"buildAlertStyle 2");
id rv = [super buildAlertStyle:fp8
title:fp12
message:fp16
first:fp20
second:fp24
third:fp28
oldStyle:fp32
args:fp36];
[self _addDatePickersToAlert];
return rv;
}
- (void)onSwitchControl:(NSDatePicker *)which newDate:(NSDate **)newDate
{
// Halt the delegate on the one we're setting first.
if (which == _pickertop) {
NSLog(@"control event: top");
[_pickerbottom setDelegate:nil];
[_pickerbottom setDateValue:*newDate];
[_pickerbottom setDelegate:_bottomdelegate];
} else if (which == _pickerbottom) {
NSLog(@"control event: bottom");
[_pickertop setDelegate:nil];
[_pickertop setDateValue:*newDate];
[_pickertop setDelegate:_topdelegate];
} else
NSLog(@"wtf");
}
- (NSDate *)date
{
[self _ensureDatePickers];
return [_pickertop dateValue];
}
- (void)setDate:(NSDate *)date
{
[self _ensureDatePickers];
[_pickertop setDateValue:date];
[_pickerbottom setDateValue:date];
}
@end
@implementation NSDoubleDatePicker(Private)
- (void)_ensureDatePickers
{
if (!_pickertop) {
// NSLog(@"picker init");
_pickertop = [[NSDatePicker alloc] initWithFrame:NSMakeRect(10,10,295,154)];
[_pickertop setDatePickerStyle:NSClockAndCalendarDatePickerStyle];
[_pickertop setDatePickerElements:NSYearMonthDayDatePickerElementFlag];
_topdelegate = [[NSDoubleDateDelegate alloc] init];
[_topdelegate setParentAlert:self withSource:_pickertop];
[_pickertop setDelegate:_topdelegate];
_pickerbottom = [[NSDatePicker alloc] initWithFrame:NSMakeRect(10,10,295,154)];
[_pickerbottom setDatePickerStyle:NSTextFieldAndStepperDatePickerStyle];
[_pickerbottom setDatePickerElements:NSYearMonthDayDatePickerElementFlag];
_bottomdelegate = [[NSDoubleDateDelegate alloc] init];
[_bottomdelegate setParentAlert:self withSource:_pickerbottom];
[_pickerbottom setDelegate:_bottomdelegate];
}
}
- (void)_addDatePickersToAlert
{
NSWindow *window = [self window];
NSView *content = [window contentView];
float padding = 14.0f;
NSArray *subviews = [content subviews];
NSEnumerator *en = [subviews objectEnumerator];
NSView *subview = nil;
NSTextField *messageText = nil;
int count = 0;
[self _ensureDatePickers];
// Find the main text field.
while (subview = [en nextObject]) {
if ([subview isKindOfClass:[NSTextField class]]) {
if (++count == 2)
messageText = (NSTextField *)subview;
}
}
if (messageText) {
[content addSubview:_pickertop];
[_pickertop sizeToFit];
[content addSubview:_pickerbottom];
[_pickerbottom sizeToFit];
// Expand the alert window.
NSRect windowFrame = [window frame];
NSRect topPickerFrame = [_pickertop frame];
NSRect bottomPickerFrame = [_pickerbottom frame];
windowFrame.size.height += topPickerFrame.size.height + padding +
bottomPickerFrame.size.height + padding;
[window setFrame:windowFrame display:YES];
// Insert the pickers below the main text field.
topPickerFrame.origin.y = [messageText frame].origin.y -
bottomPickerFrame.size.height - padding -
topPickerFrame.size.height - padding;
topPickerFrame.origin.x = [messageText frame].origin.x;
bottomPickerFrame.origin.y = topPickerFrame.origin.y +
topPickerFrame.size.height + padding;
bottomPickerFrame.origin.x = topPickerFrame.origin.x;
[_pickertop setFrame:topPickerFrame];
[_pickerbottom setFrame:bottomPickerFrame];
//[window makeMainWindow];
[window makeKeyWindow];
//[window orderFrontRegardless];
//NSLog(@"Picker installed");
} else
NSLog(@"Couldn't find message text, did not add pickers");
}
@end
////// App delegate runner
@interface AppDelegate : NSObject
- (id) init;
- (void) applicationWillFinishLaunching: (NSNotification*) aNotification;
- (void) applicationDidFinishLaunching: (NSNotification*) aNotification;
@end
@implementation AppDelegate
- (id) init
{
return [super init];
}
- (void) applicationWillFinishLaunching: (NSNotification*) aNotification
{
// NSLog(@"WillFinish");
}
- (void) applicationDidFinishLaunching: (NSNotification*) aNotification;
{
NSDoubleDatePicker *alert = [NSDoubleDatePicker
alertWithMessageText:@"One"
defaultButton:@"OK"
alternateButton:@"Cancel"
otherButton:nil
informativeTextWithFormat:@"Blah blah"];
[alert setDate:[NSDate date]];
int32_t result = [alert runModal];
NSDate *date = [alert date];
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
[formatter setFormatterBehavior:NSDateFormatterBehavior10_4];
[formatter setDateFormat:@"yyyy-MM-dd"];
NSString *stringFromDate = [formatter stringFromDate:date];
printf("%d %s\n", result, [stringFromDate UTF8String]);
[[NSApplication sharedApplication] terminate:nil];
}
@end
int main(int argc, char **argv) {
NSAutoreleasePool *shutup = [[NSAutoreleasePool alloc] init];
NSApplication *application = [NSApplication sharedApplication];
AppDelegate *applicationDelegate = [[AppDelegate alloc] init];
[application setDelegate:applicationDelegate];
[application run];
return 0;
}
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