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July 30, 2009 16:09
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CPNavigationController & CPViewController
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| /* | |
| * CPViewController.j | |
| * AppKit | |
| * | |
| * Created by Nicholas Small. | |
| * Copyright 2009, 280 North, Inc. | |
| * | |
| * This library is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * This library is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with this library; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| @import <AppKit/CPResponder.j> | |
| /*! @class CPViewController | |
| The CPViewController class provides the fundamental view-management controller for Cappuccino applications. | |
| The basic view controller class supports the presentation of an associated view in addition to basic support | |
| for managing modal views and, in the future, animations. Subclasses such as CPNavigationController and | |
| CPTabBarController provide additional behavior for managing complex hierarchies of view controllers and views. | |
| You use each instance of CPViewController to manage a single view (and hierarchy). For a simple view controller, | |
| this entails managing the view hierarchy responsible for presenting your application content. | |
| A typical view hierarchy consists of a root view—a reference to which is available in the view property of this class— | |
| and one or more subviews presenting the actual content. In the case of navigation and tab bar controllers, the view | |
| controller manages not only the high-level view hierarchy (which provides the navigation controls) but also one | |
| or more additional view controllers that handle the presentation of the application content. | |
| Unlike UIViewController in Cocoa Touch, a CPViewController does not represent an entire screen of content. You | |
| will add your root view to an existing view or window's content view. You can manage many view controllers | |
| on screen at once. CPViewController is also the preferred way of working with Cibs. | |
| Subclasses can override -loadView to create their custom view hierarchy, or specify a cib name to be loaded automatically. | |
| It has methods that are called when a view appears or disappears. | |
| This class is also a good place for delegate & datasource methods, and other controller stuff. | |
| */ | |
| @implementation CPViewController : CPResponder | |
| { | |
| CPView _view; | |
| CPRadioItem _radioItem; | |
| CPNavigationItem _navigationItem; | |
| CPString _title; | |
| CPString _cibName; | |
| CPBundle _cibBundle; | |
| CPViewController _parentViewController; | |
| CPDictionary _childViewControllers; | |
| BOOL _isViewLoaded; | |
| } | |
| /*! | |
| Convenience initializer calls -initWithCibName:bundle: with nil for both parameters. | |
| */ | |
| - (id)init | |
| { | |
| return [self initWithCibName:nil bundle:nil]; | |
| } | |
| /*! | |
| The designated initializer. If you subclass CPViewController, you must call the super implementation of this method, even if you aren't using a Cib. | |
| In the specified Cib, the File's Owner proxy should have its class set to your view controller subclass, with the view outlet connected to the main view. | |
| If you pass in a nil Cib name, then you must either call -setView: before -view is invoked, or override -loadView to set up your views. | |
| @param cibNameOrNil The path to the cib to load for the root view or nil to programmatically create views. | |
| @param cibBundleOrNil The bundle that the cib is located in or nil for the main bundle. | |
| */ | |
| - (id)initWithCibName:(CPString)cibNameOrNil bundle:(CPBundle)cibBundleOrNil | |
| { | |
| self = [super init]; | |
| if (self) | |
| { | |
| // We're lazy. Don't load the cib until someone actually requests the view. | |
| _cibName = cibNameOrNil; | |
| _cibBundle = cibBundleOrNil || [CPBundle mainBundle]; | |
| } | |
| return self; | |
| } | |
| /*! | |
| Programmatically creates the view that the controller manages. | |
| You should never call this method directly. The view controller calls this method when the view property is requested but is nil. | |
| If you create your views manually, you must override this method and use it to create your view and assign it to the view property. | |
| The default implementation for programmatic views is to create a plain view. You can invoke super to utilize this view. | |
| If you use Interface Builder to create your views and initialize the view controller—that is, you initialize the view using the | |
| initWithCibName:bundle: method—then you must not override this method. The consequences risk shattering the space-time continuum. | |
| Note: The cib loading system is currently asynchronous. | |
| */ | |
| - (void)loadView | |
| { | |
| if ([self isViewLoaded]) | |
| return; | |
| if (_cibName) | |
| { | |
| var cib = [[CPCib alloc] initWithContentsOfURL:[_cibBundle pathForResource:_cibName + @".cib"]]; | |
| [cib instantiateCibWithExternalNameTable:[CPDictionary dictionaryWithObject:self forKey:CPCibOwner]]; | |
| } | |
| else | |
| { | |
| _view = [[CPView alloc] initWithFrame:CGRectMakeZero()]; | |
| [_view setBackgroundColor:[CPColor blueColor]]; | |
| } | |
| } | |
| /*! | |
| Called after the view has been loaded. | |
| For view controllers created in code, this is after -loadView. For view controllers unarchived from a cib, this is after the view is set. | |
| This method is most commonly used to perform additional initialization steps on views that are loaded from cib files. | |
| The default implementation does nothing, but it is recommended your invoke super in case of future changes. | |
| */ | |
| - (void)viewDidLoad | |
| { | |
| } | |
| /*! | |
| Called after the view controller's view is set to nil. Not invoked as a result of -dealloc. | |
| The default implementation does nothing, but it is recommended your invoke super in case of future changes. | |
| */ | |
| - (void)viewDidUnload | |
| { | |
| } | |
| /*! | |
| Returns the view that the controller manages. | |
| If this property is nil, the controller sends loadView to itself to create the view that it manages. | |
| Subclasses should override the loadView method to create any custom views. The default value is nil. | |
| Note: An error will not be thrown if after -loadView, the view property is still nil. -view will simply return nil, but will continue to call -loadView on subsequent calls. | |
| */ | |
| - (CPView)view | |
| { | |
| if (!_view) | |
| { | |
| [self loadView]; | |
| if (_view) | |
| [self viewDidLoad]; | |
| } | |
| return _view; | |
| } | |
| /*! | |
| Manually sets the view that the controller manages. | |
| Setting to nil will cause -loadView to be called on all subsequent calls of -view. | |
| @param aView The view this controller should represent. | |
| */ | |
| - (void)setView:(CPView)aView | |
| { | |
| if (_view && _view == aView) | |
| return; | |
| if (_view) | |
| _view._viewController = nil; | |
| if (_view) | |
| [_view removeFromSuperview]; | |
| _view = aView; | |
| if (_view) | |
| _view._viewController = self; | |
| _isViewLoaded = !!_view; | |
| } | |
| // Auxiliary View Items | |
| /*! | |
| Returns the navigation item for this view controller or creates it if it doesn't exist. You MUST use this | |
| method to create a navigation item for a view controller; there is no setter. | |
| Note: The title of the view controller must already in order for a navigation item to be created. | |
| */ | |
| - (CPNavigationItem)navigationItem | |
| { | |
| if (!_navigationItem) | |
| { | |
| _navigationItem = [[CPNavigationItem alloc] initWithTitle:[self title]]; | |
| _navigationItem._viewController = self; | |
| } | |
| return _navigationItem; | |
| } | |
| /*! | |
| Returns the radio item for this view controller or creates it if it doesn't exist. You MUST use this | |
| method to create a radio item for a view controller; there is no setter. | |
| Note: Unlike a navigation item, a radio item MAY be created without a title. | |
| */ | |
| - (CPRadioItem)radioItem | |
| { | |
| if (!_radioItem) | |
| { | |
| _radioItem = [[CPRadioItem alloc] init]; | |
| [_radioItem setTitle:[self title]]; | |
| } | |
| return _radioItem; | |
| } | |
| /*! | |
| Returns the parent controller (navigation or tab bar) of the current view controller or nil. | |
| Parent view controllers are relevant in navigation, tab bar, and modal view controller hierarchies. | |
| In each of these hierarchies, the parent is the object responsible for displaying the current view controller. | |
| If you are using a view controller as a standalone object—that is, not as part of a view controller hierarchy—the value in this property is nil. | |
| */ | |
| - (CPViewController)parentViewController | |
| { | |
| return _parentViewController; | |
| } | |
| // View Appearance Hooks | |
| /*! | |
| Sent to the controller before the view appears on screen. | |
| The default implementation of this method does nothing. Subclasses may override this method to take an appropriate action. When doing so, they must invoke super. | |
| @param animated Will be YES if the view is animating. Animations are supported in the API, but don't actually do anything yet. | |
| */ | |
| - (void)viewWillAppear:(BOOL)animated | |
| { | |
| } | |
| /*! | |
| Sent to the controller after the view fully appears on screen. | |
| The default implementation of this method does nothing. Subclasses may override this method to take an appropriate action. When doing so, they must invoke super. | |
| @param animated Will be YES if the view is animating. Animations are supported in the API, but don't actually do anything yet. | |
| */ | |
| - (void)viewDidAppear:(BOOL)animated | |
| { | |
| } | |
| /*! | |
| Sent to the controller before the view is dismissed, covered, or otherwise hidden from view. | |
| The default implementation of this method does nothing. Subclasses may override this method to take an appropriate action. When doing so, they must invoke super. | |
| @param animated Will be YES if the view is animating. Animations are supported in the API, but don't actually do anything yet. | |
| */ | |
| - (void)viewWillDisappear:(BOOL)animated | |
| { | |
| } | |
| /*! | |
| Sent to the controller after the view is dismissed, covered, or otherwise hidden from view. | |
| The default implementation of this method does nothing. Subclasses may override this method to take an appropriate action. When doing so, they must invoke super. | |
| @param animated Will be YES if the view is animating. Animations are supported in the API, but don't actually do anything yet. | |
| */ | |
| - (void)viewDidDisappear:(BOOL)animated | |
| { | |
| } | |
| // Accessors | |
| /*! | |
| Returns the localized title that represents the view this controller manages. | |
| */ | |
| - (CPString)title | |
| { | |
| return _title; | |
| } | |
| /*! | |
| Sets the localized title that represents the view this controller manages. | |
| Subclasses should set the title to a human-readable string that represents the view to the user. | |
| If the receiver has a navigation or tab bar item, its title will change to reflect the new title. | |
| If the receiver is a navigation controller, the default value is the top view controller’s title. | |
| @param aTitle A string for the new title. This string will use -copy. | |
| */ | |
| - (void)setTitle:(CPString)aTitle | |
| { | |
| if (_title == aTitle) | |
| return; | |
| _title = [aTitle copy]; | |
| if (_navigationItem) // Don't create them if they don't already exist. Aka don't call [self navigationItem]. | |
| [_navigationItem setTitle:_title]; | |
| if (_radioItem) | |
| [_radioItem setTitle:_title]; | |
| } | |
| /*! | |
| Returns a BOOL that indicated whether the view property has successfully been loaded (not nil). | |
| Calling this method will not cause the view to load if it is currently nil. | |
| */ | |
| - (BOOL)isViewLoaded | |
| { | |
| return _isViewLoaded; | |
| } | |
| /*! | |
| Returns the path of the cib file this view controller represents. | |
| This attribute is read-only. You can only set it through -initWithCibName:bundle: | |
| */ | |
| - (CPString)cibName | |
| { | |
| return _cibName; | |
| } | |
| /*! | |
| Returns the bundle that the cib file this view controller represents resides in. | |
| This attribute is read-only. You can only set it through -initWithCibName:bundle: | |
| */ | |
| - (CPBundle)cibBundle | |
| { | |
| return _cibBundle; | |
| } | |
| @end | |
| /*! | |
| @ignore | |
| */ | |
| @implementation _CPLayoutView : CPView | |
| { | |
| CPViewController _viewController; | |
| } | |
| - (id)init | |
| { | |
| self = [super initWithFrame:CGRectMakeZero()]; | |
| if (self) | |
| { | |
| [self setAutoresizingMask:CPViewWidthSizable | CPViewHeightSizable]; | |
| } | |
| return self; | |
| } | |
| - (void)viewWillMoveToSuperview:(CPView)aView | |
| { | |
| [self setFrame:CGRectMakeCopy([aView bounds])]; | |
| [_viewController viewWillAppear:NO]; | |
| } | |
| - (void)viewDidMoveToSuperview | |
| { | |
| [_viewController viewDidAppear:NO]; | |
| } | |
| - (void)removeFromSuperview | |
| { | |
| [_viewController viewWillDisappear:NO]; | |
| [super removeFromSuperview]; | |
| [_viewController viewDidDisappear:NO]; | |
| } | |
| @end |
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