src/chrome/browser/ui/views/infobars/translate_infobar_base.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 "chrome/browser/ui/views/infobars/translate_infobar_base.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "chrome/browser/infobars/infobar.h"
   9 #include "chrome/browser/translate/translate_infobar_delegate.h"
  10 #include "chrome/browser/translate/translate_tab_helper.h"
  11 #include "chrome/browser/ui/views/infobars/after_translate_infobar.h"
  12 #include "chrome/browser/ui/views/infobars/before_translate_infobar.h"
  13 #include "chrome/browser/ui/views/infobars/translate_message_infobar.h"
  14 #include "grit/theme_resources.h"
  15 #include "ui/base/resource/resource_bundle.h"
  16 #include "ui/gfx/animation/slide_animation.h"
  17 #include "ui/gfx/canvas.h"
  18 #include "ui/views/controls/button/menu_button.h"
  19 #include "ui/views/controls/label.h"
  20
  21
  22 // TranslateInfoBarDelegate ---------------------------------------------------
  23
  24 // static
  25 scoped_ptr<InfoBar> TranslateInfoBarDelegate::CreateInfoBar(
  26     scoped_ptr<TranslateInfoBarDelegate> delegate) {
  27   if (delegate->translate_step() == TranslateTabHelper::BEFORE_TRANSLATE)
  28     return scoped_ptr<InfoBar>(new BeforeTranslateInfoBar(delegate.Pass()));
  29   if (delegate->translate_step() == TranslateTabHelper::AFTER_TRANSLATE)
  30     return scoped_ptr<InfoBar>(new AfterTranslateInfoBar(delegate.Pass()));
  31   return scoped_ptr<InfoBar>(new TranslateMessageInfoBar(delegate.Pass()));
  32 }
  33
  34
  35 // TranslateInfoBarBase -------------------------------------------------------
  36
  37 // static
  38 const int TranslateInfoBarBase::kButtonInLabelSpacing = 5;
  39
  40 void TranslateInfoBarBase::UpdateLanguageButtonText(
  41     views::MenuButton* button,
  42     const base::string16& text) {
  43   DCHECK(button);
  44   button->SetText(text);
  45   button->ClearMaxTextSize();
  46   button->SizeToPreferredSize();
  47   Layout();
  48   SchedulePaint();
  49 }
  50
  51 TranslateInfoBarBase::TranslateInfoBarBase(
  52     scoped_ptr<TranslateInfoBarDelegate> delegate)
  53     : InfoBarView(delegate.PassAs<InfoBarDelegate>()),
  54       error_background_(InfoBarDelegate::WARNING_TYPE) {
  55 }
  56
  57 TranslateInfoBarBase::~TranslateInfoBarBase() {
  58 }
  59
  60 void TranslateInfoBarBase::ViewHierarchyChanged(
  61     const ViewHierarchyChangedDetails& details) {
  62   if (details.is_add && (details.child == this) &&
  63       (background_color_animation_ == NULL)) {
  64     background_color_animation_.reset(new gfx::SlideAnimation(this));
  65     background_color_animation_->SetTweenType(gfx::Tween::LINEAR);
  66     background_color_animation_->SetSlideDuration(500);
  67     TranslateInfoBarDelegate::BackgroundAnimationType animation =
  68         GetDelegate()->background_animation_type();
  69     if (animation == TranslateInfoBarDelegate::NORMAL_TO_ERROR) {
  70       background_color_animation_->Show();
  71     } else if (animation == TranslateInfoBarDelegate::ERROR_TO_NORMAL) {
  72       // Hide() runs the animation in reverse.
  73       background_color_animation_->Reset(1.0);
  74       background_color_animation_->Hide();
  75     }
  76   }
  77
  78   // This must happen after adding all other children so InfoBarView can ensure
  79   // the close button is the last child.
  80   InfoBarView::ViewHierarchyChanged(details);
  81 }
  82
  83 TranslateInfoBarDelegate* TranslateInfoBarBase::GetDelegate() {
  84   return delegate()->AsTranslateInfoBarDelegate();
  85 }
  86
  87 void TranslateInfoBarBase::OnPaintBackground(gfx::Canvas* canvas) {
  88   // We need to set the separator color for |error_background_| like
  89   // InfoBarView::Layout() does for the normal background.
  90   const InfoBarContainer::Delegate* delegate = container_delegate();
  91   if (delegate)
  92     error_background_.set_separator_color(delegate->GetInfoBarSeparatorColor());
  93
  94   // If we're not animating, simply paint the background for the current state.
  95   if (!background_color_animation_->is_animating()) {
  96     GetBackground().Paint(canvas, this);
  97     return;
  98   }
  99
 100   FadeBackground(canvas, 1.0 - background_color_animation_->GetCurrentValue(),
 101                  *background());
 102   FadeBackground(canvas, background_color_animation_->GetCurrentValue(),
 103                  error_background_);
 104 }
 105
 106 void TranslateInfoBarBase::AnimationProgressed(
 107     const gfx::Animation* animation) {
 108   if (animation == background_color_animation_.get())
 109     SchedulePaint();  // That'll trigger a PaintBackgroud.
 110   else
 111     InfoBarView::AnimationProgressed(animation);
 112 }
 113
 114 const views::Background& TranslateInfoBarBase::GetBackground() {
 115   return GetDelegate()->is_error() ? error_background_ : *background();
 116 }
 117
 118 void TranslateInfoBarBase::FadeBackground(gfx::Canvas* canvas,
 119                                           double animation_value,
 120                                           const views::Background& background) {
 121   // Draw the background into an offscreen buffer with alpha value per animation
 122   // value, then blend it back into the current canvas.
 123   canvas->SaveLayerAlpha(static_cast<int>(animation_value * 255));
 124   background.Paint(canvas, this);
 125   canvas->Restore();
 126 }