Autofill dialog for the Mac. This is UI only at this point. The UI is not h...

chrome/browser/cocoa/vertical_layout_view.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/vertical_layout_view.h"
+
+@interface VerticalLayoutView(PrivateMethods)
+- (void)layoutChildren;
+@end
+
+@implementation VerticalLayoutView
+
+- (id)initWithFrame:(NSRect)frame {
+  self = [super initWithFrame:frame];
+  if (self) {
+    // Turn auto resizing off, we'll be laying out our children programatically.
+    [self setAutoresizesSubviews:NO];
+    [self setAutoresizingMask:NSViewNotSizable];
+  }
+
+  return self;
+}
+
+// Flip the coordinate system to arrange child views from top to bottom
+// with top at 0, increasing down.  This simplifies the logic and plays
+// well with containing scroll views.
+- (BOOL)isFlipped {
+  return YES;
+}
+
+// Override the default |viewWillDraw| to indicate to drawing machinery proper
+// arrangement of subvies.
+- (void)viewWillDraw {
+  // Reposition child views prior to super's descent into its |viewWillDraw|
+  // pass.
+  [self layoutChildren];
+
+  // Default descent into subviews.
+  [super viewWillDraw];
+
+  // Adjust children again to account for any modifications made during the
+  // prior descent.  Most importantly we resize our own frame to properly
+  // adjust any containing scroll view.
+  [self layoutChildren];
+}
+
+@end
+
+@implementation VerticalLayoutView(PrivateMethods)
+
+// This method traverses the immediate subviews measuring their height and
+// adjusting their frames so they are arranged vertically ordered relative
+// to their sibling views.  Note the dependency here on the |isFlipped|
+// state.  This code assumes |isFlipped| is YES.
+- (void)layoutChildren {
+  NSArray* children = [self subviews];
+  int childCount = [children count];
+
+  CGFloat yPosition = 0.0;
+  for (int i = childCount-1; i >= 0; --i) {
+    NSView* child = [children objectAtIndex:i];
+    [child setFrameOrigin:NSMakePoint([child frame].origin.x, yPosition)];
+    yPosition += [child frame].size.height;
+  }
+
+  // Resize self to reflect vertical extent of children.
+  [self setFrame:NSMakeRect([self frame].origin.x,
+                            [self frame].origin.y,
+                            [self frame].size.width,
+                            yPosition)];
+}
+
+@end