ash: Make sure all the sub-popups retain the same height as the main popup.

ash/system/tray/tray_details_view.cc

Index: ash/system/tray/tray_details_view.cc
diff --git a/ash/system/tray/tray_details_view.cc b/ash/system/tray/tray_details_view.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2d1d1cd0fd6542c2fb035884d4368a6cab43ae97
--- /dev/null
+++ b/ash/system/tray/tray_details_view.cc
@@ -0,0 +1,82 @@
+// Copyright (c) 2012 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.
+
+#include "ash/system/tray/tray_details_view.h"
+
+#include "ash/system/tray/tray_constants.h"
+#include "ash/system/tray/tray_views.h"
+#include "ui/views/background.h"
+#include "ui/views/controls/scroll_view.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/views/layout/grid_layout.h"
+
+namespace ash {
+namespace internal {
+
+TrayDetailsView::TrayDetailsView()
+    : footer_(NULL),
+      scroller_(NULL),
+      scroll_content_(NULL) {
+  SetLayoutManager(new views::BoxLayout(views::BoxLayout::kVertical,
+      0, 0, 0));
+  set_background(views::Background::CreateSolidBackground(kBackgroundColor));
+}
+
+TrayDetailsView::~TrayDetailsView() {
+}
+
+void TrayDetailsView::CreateSpecialRow(int string_id,
+                                       ViewClickListener* listener) {
+  DCHECK(!footer_);
+  footer_ = new SpecialPopupRow();
+  footer_->SetTextLabel(string_id, listener);
+  AddChildViewAt(footer_, child_count());
+}
+
+void TrayDetailsView::CreateScrollableList() {
+  DCHECK(!scroller_);
+  scroll_content_ = new views::View;
+  scroll_content_->SetLayoutManager(new views::BoxLayout(
+      views::BoxLayout::kVertical, 0, 0, 1));
+  scroller_ = new FixedSizedScrollView;
+  scroller_->SetContentsView(scroll_content_);
+  AddChildView(scroller_);
+}
+
+void TrayDetailsView::Reset() {
+  RemoveAllChildViews(true);
+  footer_ = NULL;
+  scroller_ = NULL;
+  scroll_content_ = NULL;
+}
+
+void TrayDetailsView::Layout() {
+  if (!scroller_ || !footer_ || bounds().IsEmpty()) {
+    views::View::Layout();
+    return;
+  }
+
+  scroller_->set_fixed_size(gfx::Size());
+  gfx::Size size = GetPreferredSize();
+  if (size.height() < height()) {
+    // The available size is larger than the requested size. In this case, do
+    // the normal layout, then make sure the footer element is bottom aligned.
+    views::View::Layout();
+    gfx::Rect fbounds = footer_->bounds();
+    fbounds.set_y(height() - footer_->height());
+    footer_->SetBoundsRect(fbounds);
+  } else {
+    // The available size is smaller than the requested size. Squeeze the
+    // scroller so that everything fits in the available size, and then do the
+    // normal layout.
+    gfx::Size scroller_size = scroll_content_->GetPreferredSize();
+    scroller_->set_fixed_size(gfx::Size(
+        width() + scroller_->GetScrollBarWidth(),
+        scroller_size.height() - (size.height() - height())));
+    views::View::Layout();
+  }
+}
+
+}  // namespace internal
+}  // namespace ash