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      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   set_request_focus_on_press(false);
     28   set_notify_enter_exit_on_child(true);
     29   SetLayoutManager(
     30       new views::BoxLayout(views::BoxLayout::kHorizontal,
     31                            message_center::kButtonHorizontalPadding,
     32                            kButtonVecticalPadding,
     33                            message_center::kButtonIconToTitlePadding));
     34 }
     35 
     36 NotificationButton::~NotificationButton() {
     37 }
     38 
     39 void NotificationButton::SetIcon(const gfx::ImageSkia& image) {
     40   if (icon_ != NULL)
     41     delete icon_;  // This removes the icon from this view's children.
     42   if (image.isNull()) {
     43     icon_ = NULL;
     44   } else {
     45     icon_ = new views::ImageView();
     46     icon_->SetImageSize(gfx::Size(message_center::kNotificationButtonIconSize,
     47                                   message_center::kNotificationButtonIconSize));
     48     icon_->SetImage(image);
     49     icon_->SetHorizontalAlignment(views::ImageView::LEADING);
     50     icon_->SetVerticalAlignment(views::ImageView::LEADING);
     51     icon_->SetBorder(views::Border::CreateEmptyBorder(
     52         message_center::kButtonIconTopPadding, 0, 0, 0));
     53     AddChildViewAt(icon_, 0);
     54   }
     55 }
     56 
     57 void NotificationButton::SetTitle(const base::string16& title) {
     58   if (title_ != NULL)
     59     delete title_;  // This removes the title from this view's children.
     60   if (title.empty()) {
     61     title_ = NULL;
     62   } else {
     63     title_ = new views::Label(title);
     64     title_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
     65     title_->SetEnabledColor(message_center::kRegularTextColor);
     66     title_->SetBackgroundColor(kRegularTextBackgroundColor);
     67     title_->SetBorder(
     68         views::Border::CreateEmptyBorder(kButtonTitleTopPadding, 0, 0, 0));
     69     AddChildView(title_);
     70   }
     71   SetAccessibleName(title);
     72 }
     73 
     74 gfx::Size NotificationButton::GetPreferredSize() const {
     75   return gfx::Size(message_center::kNotificationWidth,
     76                    message_center::kButtonHeight);
     77 }
     78 
     79 int NotificationButton::GetHeightForWidth(int width) const {
     80   return message_center::kButtonHeight;
     81 }
     82 
     83 void NotificationButton::OnPaint(gfx::Canvas* canvas) {
     84   CustomButton::OnPaint(canvas);
     85   views::Painter::PaintFocusPainter(this, canvas, focus_painter_.get());
     86 }
     87 
     88 void NotificationButton::OnFocus() {
     89   views::CustomButton::OnFocus();
     90   ScrollRectToVisible(GetLocalBounds());
     91   // We render differently when focused.
     92   SchedulePaint();
     93  }
     94 
     95 void NotificationButton::OnBlur() {
     96   views::CustomButton::OnBlur();
     97   // We render differently when focused.
     98   SchedulePaint();
     99 }
    100 
    101 void NotificationButton::ViewHierarchyChanged(
    102     const ViewHierarchyChangedDetails& details) {
    103   // We disable view hierarchy change detection in the parent
    104   // because it resets the hoverstate, which we do not want
    105   // when we update the view to contain a new label or image.
    106   views::View::ViewHierarchyChanged(details);
    107 }
    108 
    109 void NotificationButton::StateChanged() {
    110   if (state() == STATE_HOVERED || state() == STATE_PRESSED) {
    111     set_background(views::Background::CreateSolidBackground(
    112         message_center::kHoveredButtonBackgroundColor));
    113   } else {
    114     set_background(NULL);
    115   }
    116 }
    117 
    118 }  // namespace message_center
    119