ui/message_center/views/notification_button.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 "ui/message_center/views/notification_button.h"
   6
   7 #include "ui/gfx/canvas.h"
   8 #include "ui/message_center/message_center_style.h"
   9 #include "ui/message_center/views/constants.h"
  10 #include "ui/views/background.h"
  11 #include "ui/views/border.h"
  12 #include "ui/views/controls/image_view.h"
  13 #include "ui/views/controls/label.h"
  14 #include "ui/views/layout/box_layout.h"
  15 #include "ui/views/painter.h"
  16
  17 namespace message_center {
  18
  19 NotificationButton::NotificationButton(views::ButtonListener* listener)
  20     : views::CustomButton(listener),
  21       icon_(NULL),
  22       title_(NULL),
  23       focus_painter_(views::Painter::CreateSolidFocusPainter(
  24           message_center::kFocusBorderColor,
  25           gfx::Insets(1, 2, 2, 2))) {
  26   SetFocusable(true);
  27   // Create a background so that it does not change when the MessageView
  28   // background changes to show touch feedback
  29   set_background(views::Background::CreateSolidBackground(
  30       kNotificationBackgroundColor));
  31   set_request_focus_on_press(false);
  32   set_notify_enter_exit_on_child(true);
  33   SetLayoutManager(
  34       new views::BoxLayout(views::BoxLayout::kHorizontal,
  35                            message_center::kButtonHorizontalPadding,
  36                            kButtonVecticalPadding,
  37                            message_center::kButtonIconToTitlePadding));
  38 }
  39
  40 NotificationButton::~NotificationButton() {
  41 }
  42
  43 void NotificationButton::SetIcon(const gfx::ImageSkia& image) {
  44   if (icon_ != NULL)
  45     delete icon_;  // This removes the icon from this view's children.
  46   if (image.isNull()) {
  47     icon_ = NULL;
  48   } else {
  49     icon_ = new views::ImageView();
  50     icon_->SetImageSize(gfx::Size(message_center::kNotificationButtonIconSize,
  51                                   message_center::kNotificationButtonIconSize));
  52     icon_->SetImage(image);
  53     icon_->SetHorizontalAlignment(views::ImageView::LEADING);
  54     icon_->SetVerticalAlignment(views::ImageView::LEADING);
  55     icon_->SetBorder(views::Border::CreateEmptyBorder(
  56         message_center::kButtonIconTopPadding, 0, 0, 0));
  57     AddChildViewAt(icon_, 0);
  58   }
  59 }
  60
  61 void NotificationButton::SetTitle(const base::string16& title) {
  62   if (title_ != NULL)
  63     delete title_;  // This removes the title from this view's children.
  64   if (title.empty()) {
  65     title_ = NULL;
  66   } else {
  67     title_ = new views::Label(title);
  68     title_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
  69     title_->SetEnabledColor(message_center::kRegularTextColor);
  70     title_->SetBackgroundColor(kRegularTextBackgroundColor);
  71     title_->SetBorder(
  72         views::Border::CreateEmptyBorder(kButtonTitleTopPadding, 0, 0, 0));
  73     AddChildView(title_);
  74   }
  75   SetAccessibleName(title);
  76 }
  77
  78 gfx::Size NotificationButton::GetPreferredSize() const {
  79   return gfx::Size(message_center::kNotificationWidth,
  80                    message_center::kButtonHeight);
  81 }
  82
  83 int NotificationButton::GetHeightForWidth(int width) const {
  84   return message_center::kButtonHeight;
  85 }
  86
  87 void NotificationButton::OnPaint(gfx::Canvas* canvas) {
  88   CustomButton::OnPaint(canvas);
  89   views::Painter::PaintFocusPainter(this, canvas, focus_painter_.get());
  90 }
  91
  92 void NotificationButton::OnFocus() {
  93   views::CustomButton::OnFocus();
  94   ScrollRectToVisible(GetLocalBounds());
  95   // We render differently when focused.
  96   SchedulePaint();
  97  }
  98
  99 void NotificationButton::OnBlur() {
 100   views::CustomButton::OnBlur();
 101   // We render differently when focused.
 102   SchedulePaint();
 103 }
 104
 105 void NotificationButton::ViewHierarchyChanged(
 106     const ViewHierarchyChangedDetails& details) {
 107   // We disable view hierarchy change detection in the parent
 108   // because it resets the hoverstate, which we do not want
 109   // when we update the view to contain a new label or image.
 110   views::View::ViewHierarchyChanged(details);
 111 }
 112
 113 void NotificationButton::StateChanged() {
 114   if (state() == STATE_HOVERED || state() == STATE_PRESSED) {
 115     set_background(views::Background::CreateSolidBackground(
 116         message_center::kHoveredButtonBackgroundColor));
 117   } else {
 118     set_background(views::Background::CreateSolidBackground(
 119         kNotificationBackgroundColor));
 120   }
 121 }
 122
 123 }  // namespace message_center