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//
// DBPrefsWindowController.m
//

#import "DBPrefsWindowController.h"


static DBPrefsWindowController *_sharedPrefsWindowController = nil;


@implementation DBPrefsWindowController




#pragma mark -
#pragma mark Class Methods


+ (DBPrefsWindowController *)sharedPrefsWindowController
{
if (!_sharedPrefsWindowController) {
_sharedPrefsWindowController = [[self alloc] initWithWindowNibName:[self nibName]];
}
return _sharedPrefsWindowController;
}




+ (NSString *)nibName
// Subclasses can override this to use a nib with a different name.
{
   return @"Preferences";
}




#pragma mark -
#pragma mark Setup & Teardown


- (id)initWithWindow:(NSWindow *)window
  // -initWithWindow: is the designated initializer for NSWindowController.
{
self = [super initWithWindow:nil];
if (self != nil) {
// Set up an array and some dictionaries to keep track
// of the views we'll be displaying.
toolbarIdentifiers = [[NSMutableArray alloc] init];
toolbarViews = [[NSMutableDictionary alloc] init];
toolbarItems = [[NSMutableDictionary alloc] init];

// Set up an NSViewAnimation to animate the transitions.
viewAnimation = [[NSViewAnimation alloc] init];
[viewAnimation setAnimationBlockingMode:NSAnimationNonblocking];
[viewAnimation setAnimationCurve:NSAnimationEaseInOut];
[viewAnimation setDelegate:self];

[self setCrossFade:YES];
[self setShiftSlowsAnimation:YES];
}
return self;

(void)window; // To prevent compiler warnings.
}




- (void)windowDidLoad
{
// Create a new window to display the preference views.
// If the developer attached a window to this controller
// in Interface Builder, it gets replaced with this one.
NSWindow *window = [[[NSWindow alloc] initWithContentRect:NSMakeRect(0,0,1000,1000)
styleMask:(NSTitledWindowMask |
NSClosableWindowMask |
NSMiniaturizableWindowMask)
backing:NSBackingStoreBuffered
defer:YES] autorelease];
[self setWindow:window];
contentSubview = [[[NSView alloc] initWithFrame:[[[self window] contentView] frame]] autorelease];
[contentSubview setAutoresizingMask:(NSViewMinYMargin | NSViewWidthSizable)];
[[[self window] contentView] addSubview:contentSubview];
[[self window] setShowsToolbarButton:NO];
}




- (void) dealloc {
[toolbarIdentifiers release];
[toolbarViews release];
[toolbarItems release];
[viewAnimation release];
[super dealloc];
}




#pragma mark -
#pragma mark Configuration


- (void)setupToolbar
{
// Subclasses must override this method to add items to the
// toolbar by calling -addView:label: or -addView:label:image:.
}




- (void)addView:(NSView *)view label:(NSString *)label
{
[self addView:view
label:label
image:[NSImage imageNamed:label]];
}




- (void)addView:(NSView *)view label:(NSString *)label image:(NSImage *)image
{
NSAssert (view != nil,
@"Attempted to add a nil view when calling -addView:label:image:.");

NSString *identifier = [[label copy] autorelease];

[toolbarIdentifiers addObject:identifier];
[toolbarViews setObject:view forKey:identifier];

NSToolbarItem *item = [[[NSToolbarItem alloc] initWithItemIdentifier:identifier] autorelease];
[item setLabel:label];
[item setImage:image];
[item setTarget:self];
[item setAction:@selector(toggleActivePreferenceView:)];

[toolbarItems setObject:item forKey:identifier];
}




#pragma mark -
#pragma mark Accessor Methods


- (BOOL)crossFade
{
    return _crossFade;
}




- (void)setCrossFade:(BOOL)fade
{
    _crossFade = fade;
}




- (BOOL)shiftSlowsAnimation
{
    return _shiftSlowsAnimation;
}




- (void)setShiftSlowsAnimation:(BOOL)slows
{
    _shiftSlowsAnimation = slows;
}




#pragma mark -
#pragma mark Overriding Methods


- (IBAction)showWindow:(id)sender
{
// This forces the resources in the nib to load.
(void)[self window];

// Clear the last setup and get a fresh one.
[toolbarIdentifiers removeAllObjects];
[toolbarViews removeAllObjects];
[toolbarItems removeAllObjects];
[self setupToolbar];

NSAssert (([toolbarIdentifiers count] > 0),
@"No items were added to the toolbar in -setupToolbar.");

if ([[self window] toolbar] == nil) {
NSToolbar *toolbar = [[NSToolbar alloc] initWithIdentifier:@"DBPreferencesToolbar"];
[toolbar setAllowsUserCustomization:NO];
[toolbar setAutosavesConfiguration:NO];
[toolbar setSizeMode:NSToolbarSizeModeDefault];
[toolbar setDisplayMode:NSToolbarDisplayModeIconAndLabel];
[toolbar setDelegate:self];
[[self window] setToolbar:toolbar];
[toolbar release];
}

NSString *firstIdentifier = [toolbarIdentifiers objectAtIndex:0];
[[[self window] toolbar] setSelectedItemIdentifier:firstIdentifier];
[self displayViewForIdentifier:firstIdentifier animate:NO];

[[self window] center];

[super showWindow:sender];
}




#pragma mark -
#pragma mark Toolbar


- (NSArray *)toolbarDefaultItemIdentifiers:(NSToolbar*)toolbar
{
return toolbarIdentifiers;

(void)toolbar;
}




- (NSArray *)toolbarAllowedItemIdentifiers:(NSToolbar*)toolbar
{
return toolbarIdentifiers;

(void)toolbar;
}




- (NSArray *)toolbarSelectableItemIdentifiers:(NSToolbar *)toolbar
{
return toolbarIdentifiers;
(void)toolbar;
}




- (NSToolbarItem *)toolbar:(NSToolbar *)toolbar itemForItemIdentifier:(NSString *)identifier willBeInsertedIntoToolbar:(BOOL)willBeInserted
{
return [toolbarItems objectForKey:identifier];
(void)toolbar;
(void)willBeInserted;
}




- (void)toggleActivePreferenceView:(NSToolbarItem *)toolbarItem
{
[self displayViewForIdentifier:[toolbarItem itemIdentifier] animate:YES];
}




- (void)displayViewForIdentifier:(NSString *)identifier animate:(BOOL)animate
{
// Find the view we want to display.
NSView *newView = [toolbarViews objectForKey:identifier];

// See if there are any visible views.
NSView *oldView = nil;
if ([[contentSubview subviews] count] > 0) {
// Get a list of all of the views in the window. Usually at this
// point there is just one visible view. But if the last fade
// hasn't finished, we need to get rid of it now before we move on.
NSEnumerator *subviewsEnum = [[contentSubview subviews] reverseObjectEnumerator];

// The first one (last one added) is our visible view.
oldView = [subviewsEnum nextObject];

// Remove any others.
NSView *reallyOldView = nil;
while ((reallyOldView = [subviewsEnum nextObject]) != nil) {
[reallyOldView removeFromSuperviewWithoutNeedingDisplay];
}
}

if (![newView isEqualTo:oldView]) {
NSRect frame = [newView bounds];
frame.origin.y = NSHeight([contentSubview frame]) - NSHeight([newView bounds]);
[newView setFrame:frame];
[contentSubview addSubview:newView];
[[self window] setInitialFirstResponder:newView];

if (animate && [self crossFade])
[self crossFadeView:oldView withView:newView];
else {
[oldView removeFromSuperviewWithoutNeedingDisplay];
[newView setHidden:NO];
[[self window] setFrame:[self frameForView:newView] display:YES animate:animate];
}

[[self window] setTitle:[[toolbarItems objectForKey:identifier] label]];
}
}




#pragma mark -
#pragma mark Cross-Fading Methods


- (void)crossFadeView:(NSView *)oldView withView:(NSView *)newView
{
[viewAnimation stopAnimation];

    if ([self shiftSlowsAnimation] && [[[self window] currentEvent] modifierFlags] & NSShiftKeyMask)
[viewAnimation setDuration:1.25];
    else
[viewAnimation setDuration:0.25];

NSDictionary *fadeOutDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
oldView, NSViewAnimationTargetKey,
NSViewAnimationFadeOutEffect, NSViewAnimationEffectKey,
nil];

NSDictionary *fadeInDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
newView, NSViewAnimationTargetKey,
NSViewAnimationFadeInEffect, NSViewAnimationEffectKey,
nil];

NSDictionary *resizeDictionary = [NSDictionary dictionaryWithObjectsAndKeys:
[self window], NSViewAnimationTargetKey,
[NSValue valueWithRect:[[self window] frame]], NSViewAnimationStartFrameKey,
[NSValue valueWithRect:[self frameForView:newView]], NSViewAnimationEndFrameKey,
nil];

NSArray *animationArray = [NSArray arrayWithObjects:
fadeOutDictionary,
fadeInDictionary,
resizeDictionary,
nil];

[viewAnimation setViewAnimations:animationArray];
[viewAnimation startAnimation];
}




- (void)animationDidEnd:(NSAnimation *)animation
{
NSView *subview;

// Get a list of all of the views in the window. Hopefully
// at this point there are two. One is visible and one is hidden.
NSEnumerator *subviewsEnum = [[contentSubview subviews] reverseObjectEnumerator];

// This is our visible view. Just get past it.
subview = [subviewsEnum nextObject];

// Remove everything else. There should be just one, but
// if the user does a lot of fast clicking, we might have
// more than one to remove.
while ((subview = [subviewsEnum nextObject]) != nil) {
[subview removeFromSuperviewWithoutNeedingDisplay];
}

// This is a work-around that prevents the first
// toolbar icon from becoming highlighted.
[[self window] makeFirstResponder:nil];

(void)animation;
}




- (NSRect)frameForView:(NSView *)view
// Calculate the window size for the new view.
{
NSRect windowFrame = [[self window] frame];
NSRect contentRect = [[self window] contentRectForFrameRect:windowFrame];
float windowTitleAndToolbarHeight = NSHeight(windowFrame) - NSHeight(contentRect);

windowFrame.size.height = NSHeight([view frame]) + windowTitleAndToolbarHeight;
windowFrame.size.width = NSWidth([view frame]);
windowFrame.origin.y = NSMaxY([[self window] frame]) - NSHeight(windowFrame);

return windowFrame;
}




@end
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