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diff --git a/tikzit-1/src/osx/PreferenceController.m b/tikzit-1/src/osx/PreferenceController.m
new file mode 100644
index 0000000..e785358
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+++ b/tikzit-1/src/osx/PreferenceController.m
@@ -0,0 +1,133 @@
+//
+//  PreferenceController.m
+//  TikZiT
+//
+//  Created by Karl Johan Paulsson on 26/02/2013.
+//  Copyright (c) 2013 Aleks Kissinger. All rights reserved.
+//
+//
+//  This file is part of TikZiT.
+//
+//  TikZiT 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.
+//
+//  TikZiT 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 General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with TikZiT.  If not, see <http://www.gnu.org/licenses/>.
+//
+
+#import "PreferenceController.h"
+
+@interface PreferenceController ()
+
+@end
+
+@implementation PreferenceController
+
+- (id)initWithWindowNibName:(NSString *)windowNibName preambleController:(PreambleController *)pc{
+    if (!(self = [super initWithWindowNibName:windowNibName])) return nil;
+    
+    preambleController = pc;
+    
+    return self;
+}
+
+- (NSRect)newFrameForNewContentView:(NSView*)view {
+    NSWindow *window = [self window];
+    NSRect newFrameRect = [window frameRectForContentRect:[view frame]];
+    NSRect oldFrameRect = [window frame];
+    NSSize newSize = newFrameRect.size;
+    NSSize oldSize = oldFrameRect.size;
+    
+    NSRect frame = [window frame];
+    frame.size = newSize;
+    frame.origin.y -= (newSize.height - oldSize.height);
+    
+    return frame;
+}
+
+- (NSView *)viewForTag:(int)tag {
+    
+    NSView *view = nil;
+    switch (tag) {
+        default:
+        case 0:
+            view = generalView;
+        break;
+        case 1:
+            view = engineView;
+        break;
+        case 2:
+            view = updateView;
+        break;
+        case 3:
+            view = preambleView;
+        break;
+        case 4:
+            view = customNodeView;
+        break;
+    }
+    
+    return  view;
+}
+
+- (BOOL)validateToolbarItem:(NSToolbarItem *)item {
+    
+    if ([item tag] == currentViewTag) return NO;
+    else return YES;
+    
+}
+
+- (void)awakeFromNib {
+
+    [[self window] setContentSize:[generalView frame].size];
+    [[[self window] contentView] addSubview:generalView];
+    [[[self window] contentView] setWantsLayer:YES];
+
+    updateController = [[UpdatePreferenceController alloc] initWithNibName:@"UpdatePreferencePanel" bundle:nil];
+    [[updateController view] setFrame:[updateView frame]];
+    [[[self window] contentView] replaceSubview:updateView with:[updateController view]];
+    updateView = [updateController view];
+
+    [[preambleController view] setFrame:[preambleView frame]];
+    [[[self window] contentView] replaceSubview:preambleView with:[preambleController view]];
+    preambleView = [preambleController view];
+    
+    customNodeController = [[CustomNodeController alloc] initWithNibName:@"CustomNodes" bundle:nil];
+    [[customNodeController view] setFrame:[customNodeView frame]];
+    [[[self window] contentView] replaceSubview:customNodeView with:[customNodeController view]];
+    customNodeView = [customNodeController view];
+    
+    [[self window] setContentSize:[engineView frame].size];
+    [[[self window] contentView] addSubview:engineView];
+    currentViewTag = 1;
+}
+
+- (IBAction)switchView:(id)sender {
+    
+    int tag = [sender tag];
+    NSView *view = [self viewForTag:tag];
+    NSView *previousView = [self viewForTag:currentViewTag];
+    currentViewTag = tag;
+    
+    NSRect newFrame = [self newFrameForNewContentView:view];
+    
+    [NSAnimationContext beginGrouping];
+    
+    if ([[NSApp currentEvent] modifierFlags] & NSShiftKeyMask)
+        [[NSAnimationContext currentContext] setDuration:1.0];
+    
+    [[[[self window] contentView] animator] replaceSubview:previousView with:view];
+    [[[self window] animator] setFrame:newFrame display:YES];
+    
+    [NSAnimationContext endGrouping];
+
+}
+
+@end