Not meant to be reviewed or checked in: bookmark bar dragging 06/14/2010

chrome/browser/cocoa/bookmark_button.mm

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/cocoa/bookmark_button.h"
 #include "base/logging.h"
 #import "base/scoped_nsobject.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #import "chrome/browser/cocoa/bookmark_button_cell.h"
 #import "chrome/browser/cocoa/browser_window_controller.h"
@@ skipping 56 matching lines @@
       NSWindow* window = [[self delegate] browserWindow];
       visibilityDelegate_ =
           [BrowserWindowController browserWindowControllerForWindow:window];
       [visibilityDelegate_ lockBarVisibilityForOwner:self
                                        withAnimation:NO
                                                delay:NO];
     }
 
     CGFloat yAt = [self bounds].size.height;
     NSSize dragOffset = NSMakeSize(0.0, 0.0);
-    [self dragImage:[self dragImage] at:NSMakePoint(0, yAt) offset:dragOffset
+    NSImage* buttonImage = [self dragImage];
+    [self setHidden:YES];
+    [self dragImage:buttonImage at:NSMakePoint(0, yAt) offset:dragOffset
               event:event pasteboard:pboard source:self slideBack:YES];
+    [self setHidden:NO];
 
     // And we're done.
     [self autorelease];
   } else {
     // Avoid blowing up, but we really shouldn't get here.
     NOTREACHED();
   }
 }
 
 // Overridden to release bar visibility.
@@ skipping 55 matching lines @@
   [image drawAtPoint:NSMakePoint(0, 0)
             fromRect:NSMakeRect(0, 0, NSWidth(bounds), NSHeight(bounds))
            operation:NSCompositeSourceOver
             fraction:kDragImageOpacity];
 
   [dragImage unlockFocus];
   return dragImage;
 }
 
 @end  // @implementation BookmarkButton(Private)