Update the window labels if they change in overview mode.

ash/wm/overview/window_selector_item.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/wm/overview/window_selector_item.h"
 
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/shell_window_ids.h"
 #include "ash/wm/overview/scoped_transform_overview_window.h"
@@ skipping 55 matching lines @@
 
 // Vertical padding for the label, both over and beneath it.
 static const int kVerticalLabelPadding = 20;
 
 // Solid shadow length from the label
 static const int kVerticalShadowOffset = 1;
 
 // Amount of blur applied to the label shadow
 static const int kShadowBlur = 10;
 
-views::Widget* CreateWindowLabel(aura::Window* root_window,
-                                 const base::string16 title) {
-  views::Widget* widget = new views::Widget;
-  views::Widget::InitParams params;
-  params.type = views::Widget::InitParams::TYPE_POPUP;
-  params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
-  params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
-  params.parent =
-      Shell::GetContainer(root_window, ash::kShellWindowId_OverlayContainer);
-  params.accept_events = false;
-  params.visible_on_all_workspaces = true;
-  widget->set_focus_on_creation(false);
-  widget->Init(params);
-  views::Label* label = new views::Label;
-  label->SetEnabledColor(kLabelColor);
-  label->SetBackgroundColor(kLabelBackground);
-  label->set_shadows(gfx::ShadowValues(1, gfx::ShadowValue(
-      gfx::Point(0, kVerticalShadowOffset), kShadowBlur, kLabelShadow)));
-  ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
-  label->SetFontList(bundle.GetFontList(ui::ResourceBundle::BoldFont));
-  label->SetText(title);
-  views::BoxLayout* layout = new views::BoxLayout(views::BoxLayout::kVertical,
-                                                  0,
-                                                  kVerticalLabelPadding,
-                                                  0);
-  label->SetLayoutManager(layout);
-  widget->SetContentsView(label);
-  widget->Show();
-  return widget;
-}
-
 const int WindowSelectorItem::kFadeInMilliseconds = 80;
 
 WindowSelectorItem::WindowSelectorItem()
     : root_window_(NULL),
-      in_bounds_update_(false) {
+      in_bounds_update_(false),
+      window_label_view_(NULL) {

[Nina, 2014/06/25 19:54:40]

This is so that the tests fail gracefully if, for some reason, the label is not
created.

 }
 
 WindowSelectorItem::~WindowSelectorItem() {
 }
 
 void WindowSelectorItem::RemoveWindow(const aura::Window* window) {
   // If empty WindowSelectorItem will be destroyed immediately after this by
   // its owner.
   if (empty())
     return;
@@ skipping 12 matching lines @@
   target_bounds_ = target_bounds;
 
   // Set the bounds of the transparent window handler to cover the entire
   // bounding box area.
   if (!activate_window_button_) {
     activate_window_button_.reset(
         new TransparentActivateWindowButton(SelectionWindow()));
   }
   activate_window_button_->SetBounds(target_bounds);
 
-  // TODO(nsatragno): Handle window title updates.
   UpdateWindowLabels(target_bounds, root_window, animate);
 
   gfx::Rect inset_bounds(target_bounds);
   inset_bounds.Inset(kWindowMargin, kWindowMargin);
   SetItemBounds(root_window, inset_bounds, animate);
   UpdateCloseButtonBounds(root_window, animate);
 }
 
 void WindowSelectorItem::RecomputeWindowTransforms() {
   if (in_bounds_update_ || target_bounds_.IsEmpty())
     return;
   DCHECK(root_window_);
   base::AutoReset<bool> auto_reset_in_bounds_update(&in_bounds_update_, true);
   gfx::Rect inset_bounds(target_bounds_);
   inset_bounds.Inset(kWindowMargin, kWindowMargin);
   SetItemBounds(root_window_, inset_bounds, false);
   UpdateCloseButtonBounds(root_window_, false);
 }
 
 void WindowSelectorItem::SendFocusAlert() const {
   activate_window_button_->SendFocusAlert();
 }
 
 void WindowSelectorItem::ButtonPressed(views::Button* sender,
                                        const ui::Event& event) {
   views::Widget::GetWidgetForNativeView(SelectionWindow())->Close();
 }
 
+void WindowSelectorItem::OnWindowTitleChanged(aura::Window* window) {
+  if (window == SelectionWindow())
+    window_label_view_->SetText(window->title());
+}
+
 void WindowSelectorItem::UpdateCloseButtonBounds(aura::Window* root_window,
                                                  bool animate) {
   gfx::RectF align_bounds(ScreenUtil::ConvertRectFromScreen(
       root_window, SelectionWindow()->layer()->bounds()));
   gfx::Transform window_transform;
   window_transform.Translate(align_bounds.x(), align_bounds.y());
   window_transform.PreconcatTransform(SelectionWindow()->layer()->
                                           GetTargetTransform());
   window_transform.Translate(-align_bounds.x(), -align_bounds.y());
   window_transform.TransformRect(&align_bounds);
@@ skipping 62 matching lines @@
                          0);
 
   // If the root window has changed, force the window label to be recreated
   // and faded in on the new root window.
   if (window_label_ &&
       window_label_->GetNativeWindow()->GetRootWindow() != root_window) {
     window_label_.reset();
   }
 
   if (!window_label_) {
-    window_label_.reset(CreateWindowLabel(root_window,
-                                          SelectionWindow()->title()));
-    label_bounds.set_height(window_label_->
-                                GetContentsView()->GetPreferredSize().height());
-    label_bounds.set_y(label_bounds.y() - window_label_->
-                           GetContentsView()->GetPreferredSize().height());
+    CreateWindowLabel(SelectionWindow()->title());
+    label_bounds.set_height(window_label_view_->GetPreferredSize().height());
+    label_bounds.set_y(label_bounds.y() - window_label_view_->
+                           GetPreferredSize().height());
     window_label_->GetNativeWindow()->SetBounds(label_bounds);
     ui::Layer* layer = window_label_->GetNativeWindow()->layer();
 
     layer->SetOpacity(0);
     layer->GetAnimator()->StopAnimating();
 
     layer->GetAnimator()->SchedulePauseForProperties(
         base::TimeDelta::FromMilliseconds(
             ScopedTransformOverviewWindow::kTransitionMilliseconds),
         ui::LayerAnimationElement::OPACITY);
@@ skipping 16 matching lines @@
           ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET);
       settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds(
           ScopedTransformOverviewWindow::kTransitionMilliseconds));
       window_label_->GetNativeWindow()->SetBounds(label_bounds);
     } else {
       window_label_->GetNativeWindow()->SetBounds(label_bounds);
     }
   }
 }
 
+void WindowSelectorItem::CreateWindowLabel(const base::string16& title) {
+  window_label_.reset(new views::Widget);
+  views::Widget::InitParams params;
+  params.type = views::Widget::InitParams::TYPE_POPUP;
+  params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
+  params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
+  params.parent =
+      Shell::GetContainer(root_window_, ash::kShellWindowId_OverlayContainer);
+  params.accept_events = false;
+  params.visible_on_all_workspaces = true;
+  window_label_->set_focus_on_creation(false);
+  window_label_->Init(params);
+  window_label_view_ = new views::Label;
+  window_label_view_->SetEnabledColor(kLabelColor);
+  window_label_view_->SetBackgroundColor(kLabelBackground);
+  window_label_view_->set_shadows(gfx::ShadowValues(1, gfx::ShadowValue(
+      gfx::Point(0, kVerticalShadowOffset), kShadowBlur, kLabelShadow)));
+  ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
+  window_label_view_->SetFontList(
+      bundle.GetFontList(ui::ResourceBundle::BoldFont));
+  window_label_view_->SetText(title);
+  views::BoxLayout* layout = new views::BoxLayout(views::BoxLayout::kVertical,
+                                                  0,
+                                                  kVerticalLabelPadding,
+                                                  0);
+  window_label_view_->SetLayoutManager(layout);
+  window_label_->SetContentsView(window_label_view_);
+  window_label_->Show();
+}
+
 }  // namespace ash