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diff --git a/AppKit/GTMUILocalizerAndLayoutTweaker.h b/AppKit/GTMUILocalizerAndLayoutTweaker.h
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+++ b/AppKit/GTMUILocalizerAndLayoutTweaker.h
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+//
+//  GTMUILocalizerAndLayoutTweaker.h
+//
+//  Copyright 2009 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+//
+//  http://www.apache.org/licenses/LICENSE-2.0
+//
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <Cocoa/Cocoa.h>
+
+@class GTMUILocalizer;
+
+// This object will run a GTMUILocalizer on the given object, and then run
+// through the object's view heirarchy triggering any Tweakers to do their work.
+// (This "double duty" is needed so the work can be done in order during
+// awakeFromNib, if it was two objects, the order couldn't be guaranteed.)
+@interface GTMUILocalizerAndLayoutTweaker : NSObject {
+ @private
+  IBOutlet id uiObject_;  // The window or view to process on awakeFromNib
+  IBOutlet GTMUILocalizer *localizer_;  // If nil, one will be created
+  IBOutlet id localizerOwner_;  // Set if you want the default GTMUILocalizer
+}
+- (void)applyLocalizer:(GTMUILocalizer *)localizer
+            tweakingUI:(id)uiObject;
+
+// This checks to see if |view| implements @selector(sizeToFit) and calls it.
+// It then checks the class of |view| and does some fixup for known issues
+// where sizeToFit doesn't product a view that meets UI guidelines.
+// Returns the amount the view changed in size.
++ (NSSize)sizeToFitView:(NSView *)view;
+@end
+
+// This is a Tweaker that will call sizeToFit on everything within it (that
+// supports it).
+//
+// If the items were all left aligned, they will stay as such and the box will
+// resize based on the largest change of any item within it.  If they aren't
+// left aligned, they are assumed to be in a row, and it will slide everything
+// along as it lays them out to make sure they end up still spaced out and will
+// resize itself by the total change to the row.
+//
+// This Tweaker makes no attempt to deal with changes in an object height.
+//
+// This Tweaker makes no attempt to deal with its parent's width.
+@interface GTMWidthBasedTweaker : NSView {
+ @private
+  // This outlet is the view that should move by the same amount as this box
+  // grows and change its size by the inverse.  i.e.-if a box of NSTextFields,
+  // they will stay next to the box of labels and resize so the two boxes
+  // continue to use the same total space.
+  IBOutlet NSView *viewToSlideAndResize_;
+  // This outlet is just like viewToSlideAndResize_ except the view is only
+  // slid (ie-its width is not adjusted). i.e.-lets something move along next
+  // to this box.
+  IBOutlet NSView *viewToSlide_;
+  // This outlet is just like viewToSlideAndResize_ except the view is only
+  // resized (ie-its position is not adjusted). i.e.-lets something above/below
+  // this box stay the same width.  You can set this to be the window, in
+  // which case it is resized, but you need to make sure everything is setup
+  // to handle that, and using two Tweakers pointed at the window isn't likely
+  // to give the results you want.
+  IBOutlet id viewToResize_;
+
+  CGFloat widthChange_;
+}
+// Return the amount we changed our width by on last tweak.
+- (CGFloat)changedWidth;
+@end