ash/system/tray/tray_details_view.cc

   1 // Copyright (c) 2012 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/tray_details_view.h"
   6
   7 #include "ash/system/tray/fixed_sized_scroll_view.h"
   8 #include "ash/system/tray/system_tray.h"
   9 #include "ash/system/tray/system_tray_item.h"
  10 #include "ash/system/tray/tray_constants.h"
  11 #include "ui/gfx/canvas.h"
  12 #include "ui/views/background.h"
  13 #include "ui/views/border.h"
  14 #include "ui/views/controls/scroll_view.h"
  15 #include "ui/views/layout/box_layout.h"
  16
  17 namespace ash {
  18
  19 class ScrollSeparator : public views::View {
  20  public:
  21   ScrollSeparator() {}
  22
  23   ~ScrollSeparator() override {}
  24
  25  private:
  26   // Overriden from views::View.
  27   void OnPaint(gfx::Canvas* canvas) override {
  28     canvas->FillRect(gfx::Rect(0, height() / 2, width(), 1), kBorderLightColor);
  29   }
  30   gfx::Size GetPreferredSize() const override {
  31     return gfx::Size(1, kTrayPopupScrollSeparatorHeight);
  32   }
  33
  34   DISALLOW_COPY_AND_ASSIGN(ScrollSeparator);
  35 };
  36
  37 class ScrollBorder : public views::Border {
  38  public:
  39   ScrollBorder() {}
  40   ~ScrollBorder() override {}
  41
  42   void set_visible(bool visible) { visible_ = visible; }
  43
  44  private:
  45   // Overridden from views::Border.
  46   void Paint(const views::View& view, gfx::Canvas* canvas) override {
  47     if (!visible_)
  48       return;
  49     canvas->FillRect(gfx::Rect(0, view.height() - 1, view.width(), 1),
  50                      kBorderLightColor);
  51   }
  52
  53   gfx::Insets GetInsets() const override { return gfx::Insets(0, 0, 1, 0); }
  54
  55   gfx::Size GetMinimumSize() const override { return gfx::Size(0, 1); }
  56
  57   bool visible_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(ScrollBorder);
  60 };
  61
  62 TrayDetailsView::TrayDetailsView(SystemTrayItem* owner)
  63     : owner_(owner),
  64       footer_(NULL),
  65       scroller_(NULL),
  66       scroll_content_(NULL),
  67       scroll_border_(NULL) {
  68   SetLayoutManager(new views::BoxLayout(views::BoxLayout::kVertical,
  69       0, 0, 0));
  70   set_background(views::Background::CreateSolidBackground(kBackgroundColor));
  71 }
  72
  73 TrayDetailsView::~TrayDetailsView() {
  74 }
  75
  76 void TrayDetailsView::CreateSpecialRow(int string_id,
  77                                        ViewClickListener* listener) {
  78   DCHECK(!footer_);
  79   footer_ = new SpecialPopupRow();
  80   footer_->SetTextLabel(string_id, listener);
  81   AddChildViewAt(footer_, child_count());
  82 }
  83
  84 void TrayDetailsView::CreateScrollableList() {
  85   DCHECK(!scroller_);
  86   scroll_content_ = new views::View;
  87   scroll_content_->SetLayoutManager(new views::BoxLayout(
  88       views::BoxLayout::kVertical, 0, 0, 1));
  89   scroller_ = new FixedSizedScrollView;
  90   scroller_->SetContentsView(scroll_content_);
  91
  92   // Note: |scroller_| takes ownership of |scroll_border_|.
  93   scroll_border_ = new ScrollBorder;
  94   scroller_->SetBorder(scoped_ptr<views::Border>(scroll_border_));
  95
  96   AddChildView(scroller_);
  97 }
  98
  99 void TrayDetailsView::AddScrollSeparator() {
 100   DCHECK(scroll_content_);
 101   // Do not draw the separator if it is the very first item
 102   // in the scrollable list.
 103   if (scroll_content_->has_children())
 104     scroll_content_->AddChildView(new ScrollSeparator);
 105 }
 106
 107 void TrayDetailsView::Reset() {
 108   RemoveAllChildViews(true);
 109   footer_ = NULL;
 110   scroller_ = NULL;
 111   scroll_content_ = NULL;
 112 }
 113
 114 void TrayDetailsView::TransitionToDefaultView() {
 115   // Cache pointer to owner in this function scope. TrayDetailsView will be
 116   // deleted after called ShowDefaultView.
 117   SystemTrayItem* owner = owner_;
 118   if (footer_ && footer_->content() && footer_->content()->HasFocus())
 119     owner->set_restore_focus(true);
 120   owner->system_tray()->ShowDefaultView(BUBBLE_USE_EXISTING);
 121   owner->set_restore_focus(false);
 122 }
 123
 124 void TrayDetailsView::Layout() {
 125   if (bounds().IsEmpty()) {
 126     views::View::Layout();
 127     return;
 128   }
 129
 130   if (scroller_) {
 131     scroller_->set_fixed_size(gfx::Size());
 132     gfx::Size size = GetPreferredSize();
 133
 134     // Set the scroller to fill the space above the bottom row, so that the
 135     // bottom row of the detailed view will always stay just above the footer.
 136     gfx::Size scroller_size = scroll_content_->GetPreferredSize();
 137     scroller_->set_fixed_size(
 138         gfx::Size(width() + scroller_->GetScrollBarWidth(),
 139                   scroller_size.height() - (size.height() - height())));
 140   }
 141
 142   views::View::Layout();
 143
 144   if (footer_) {
 145     // Always make sure the footer element is bottom aligned.
 146     gfx::Rect fbounds = footer_->bounds();
 147     fbounds.set_y(height() - footer_->height());
 148     footer_->SetBoundsRect(fbounds);
 149   }
 150 }
 151
 152 void TrayDetailsView::OnPaintBorder(gfx::Canvas* canvas) {
 153   if (scroll_border_) {
 154     int index = GetIndexOf(scroller_);
 155     if (index < child_count() - 1 && child_at(index + 1) != footer_)
 156       scroll_border_->set_visible(true);
 157     else
 158       scroll_border_->set_visible(false);
 159   }
 160
 161   views::View::OnPaintBorder(canvas);
 162 }
 163
 164 }  // namespace ash