File: PreferencesPanel.m

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/*
   Grr RSS Reader
   
   Copyright (C) 2006, 2007 Guenther Noack <guenther@unix-ag.uni-kl.de>
   Copyright (C) 2009  GNUstep Application Team
                       Riccardo Mottola

   This application is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public
   License as published by the Free Software Foundation; either
   version 3 of the License, or (at your option) any later version.
 
   This application 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
   Library General Public License for more details.
 
   You should have received a copy of the GNU General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111 USA. 
*/

#import "PreferencesPanel.h"
#import "NSBundle+Extensions.h"

#ifdef __APPLE__
#import "GNUstep.h"
#endif

@implementation PreferencesPanel

// ---------------------------------
//    init and dealloc
// ---------------------------------

-(id) init
{
  if ((self = [super init]) != nil)
    {
      NSToolbar    *toolbar;
      BOOL         nibLoaded;

      nibLoaded = [NSBundle loadNibNamed:@"PreferencesPanel" owner:self];
      if (nibLoaded == NO)
	{
	  NSLog(@"PreferencesPanel: Failed to load nib.");
	  return nil;
	}

      RETAIN(window);
      RETAIN(replacableView);
        
      ASSIGN(prefComponents, [NSMutableArray new]);
      ASSIGN(toolbarItemIdentifiers, [NSMutableArray new]);
      ASSIGN(toolbarItems, [NSMutableDictionary new]);
        
      // Set up preferences
      [self addPreferencesComponent: [NSBundle instanceForBundleWithName: @"Proxy"]];
      [self addPreferencesComponent: [NSBundle instanceForBundleWithName: @"Fonts"]];
        
      toolbar = [(NSToolbar*)[NSToolbar alloc] initWithIdentifier: @"pref panel toolbar"];
      [toolbar autorelease];
      [toolbar setDelegate: self];
      [toolbar setAllowsUserCustomization: NO];
        
      [window setToolbar: toolbar];
      [window setFloatingPanel: YES];
    }
    
  return self;
}

-(void) dealloc
{
    DESTROY(window);
    DESTROY(replacableView);
    
    DESTROY(prefComponents);
    DESTROY(toolbarItemIdentifiers);
    DESTROY(toolbarItems);
    [super dealloc];
}

// ---------------------------------
//    singleton
// ---------------------------------

+(PreferencesPanel*) shared
{
    static PreferencesPanel* singleton = nil;
    
    if (singleton == nil) {
        ASSIGN(singleton, [PreferencesPanel new]);
    }
    
    return singleton;
}


// ---------------------------------
//    adding new panels to the preference panel
// ---------------------------------

-(BOOL) addPreferencesComponent: (id<PreferencesComponent>) aPrefComponent
{
  NSToolbarItem* item;
    NSAssert(
        [prefComponents count] == [toolbarItemIdentifiers count],
        @"Internal inconsistency: Number of toolbar items != number of pref panes."
    );
    
    [prefComponents addObject: aPrefComponent];
    
    item = [[NSToolbarItem alloc] initWithItemIdentifier: [aPrefComponent prefPaneName]];
    [item setLabel: [aPrefComponent prefPaneName]];
    [item setImage: [aPrefComponent prefPaneIcon]];
    [item setAction: @selector(changeViewAction:)];
    [item setTarget: self];
    
    [toolbarItemIdentifiers addObject: [item itemIdentifier]];
    [toolbarItems setObject: item forKey: [item itemIdentifier]];
    
    return YES;
}


// ---------------------------------
//    NSToolbar delegate
// ---------------------------------

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

// required method
- (NSArray*) toolbarAllowedItemIdentifiers: (NSToolbar*)toolbar
{
    return toolbarItemIdentifiers;
}

// required method
- (NSArray*) toolbarDefaultItemIdentifiers: (NSToolbar*)toolbar
{
    return toolbarItemIdentifiers;
}

// makes it a completely "selectable" toolbar
- (NSArray*) toolbarSelectableItemIdentifiers: (NSToolbar*)toolbar
{
    return toolbarItemIdentifiers;
}

// ---------------------------------
//    window open & close
// ---------------------------------

-(void) open
{
    [window makeKeyAndOrderFront: self];
}

-(void) close
{
    [window close];
}

// ---------------------------------
//    executed when a toolbar item is clicked
// ---------------------------------

-(void) changeViewAction: (NSToolbarItem*)sender
{
  id<ViewProvidingComponent, NSObject> comp;
  NSView* newView;
    
    comp = [prefComponents objectAtIndex: 
        [toolbarItemIdentifiers indexOfObject: [sender itemIdentifier]]];
    
    NSAssert1(
        [comp conformsToProtocol: @protocol(ViewProvidingComponent)],
        @"Component %@ should be a view providing component!", comp
    );
    
    newView = [comp view];
    [newView setFrame: [replacableView frame]];
    [[replacableView superview] replaceSubview: replacableView with: newView];
    
    ASSIGN(replacableView, newView);
}

@end