ash/system/tray/fixed_sized_scroll_view.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ash/system/tray/fixed_sized_scroll_view.h"
   6
   7 namespace ash {
   8
   9 FixedSizedScrollView::FixedSizedScrollView() {
  10   set_notify_enter_exit_on_child(true);
  11 }
  12
  13 FixedSizedScrollView::~FixedSizedScrollView() {
  14 }
  15
  16 void FixedSizedScrollView::SetContentsView(views::View* view) {
  17   SetContents(view);
  18   view->SetBoundsRect(gfx::Rect(view->GetPreferredSize()));
  19 }
  20
  21 void FixedSizedScrollView::SetFixedSize(const gfx::Size& size) {
  22   if (fixed_size_ == size)
  23     return;
  24   fixed_size_ = size;
  25   PreferredSizeChanged();
  26 }
  27
  28 gfx::Size FixedSizedScrollView::GetPreferredSize() const {
  29   gfx::Size size = fixed_size_.IsEmpty() ?
  30       contents()->GetPreferredSize() : fixed_size_;
  31   gfx::Insets insets = GetInsets();
  32   size.Enlarge(insets.width(), insets.height());
  33   return size;
  34 }
  35
  36 void FixedSizedScrollView::Layout() {
  37   gfx::Rect bounds = gfx::Rect(contents()->GetPreferredSize());
  38   bounds.set_width(std::max(0, width() - GetScrollBarWidth()));
  39   // Keep the origin of the contents unchanged so that the list will not scroll
  40   // away from the current visible region user is viewing. ScrollView::Layout()
  41   // will make sure the contents line up with its viewport properly if
  42   // the contents moves out of the viewport region.
  43   bounds.set_origin(contents()->bounds().origin());
  44   contents()->SetBoundsRect(bounds);
  45
  46   views::ScrollView::Layout();
  47   if (!vertical_scroll_bar()->visible()) {
  48     gfx::Rect bounds = contents()->bounds();
  49     bounds.set_width(bounds.width() + GetScrollBarWidth());
  50     contents()->SetBoundsRect(bounds);
  51   }
  52 }
  53
  54 void FixedSizedScrollView::OnBoundsChanged(const gfx::Rect& previous_bounds) {
  55   gfx::Rect bounds = gfx::Rect(contents()->GetPreferredSize());
  56   bounds.set_width(std::max(0, width() - GetScrollBarWidth()));
  57   contents()->SetBoundsRect(bounds);
  58 }
  59
  60 }  // namespace ash