First cut at supporting activation in the window manager

mojo/examples/wm_flow/wm/frame_controller.cc

 // Copyright 2014 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 "mojo/examples/wm_flow/wm/frame_controller.h"
 
 #include "base/strings/utf_string_conversions.h"
 #include "mojo/services/public/cpp/view_manager/view.h"
+#include "mojo/services/window_manager/window_manager_app.h"
 #include "mojo/views/native_widget_view_manager.h"
 #include "ui/views/background.h"
 #include "ui/views/controls/button/label_button.h"
 #include "ui/views/layout/layout_manager.h"
 #include "ui/views/widget/widget.h"
+#include "ui/wm/public/activation_client.h"
 
 class FrameController::LayoutManager : public views::LayoutManager,
                                        public views::ButtonListener {
  public:
   explicit LayoutManager(FrameController* controller)
       : controller_(controller),
         close_button_(
             new views::LabelButton(this, base::ASCIIToUTF16("Begone"))),
         maximize_button_(
             new views::LabelButton(this, base::ASCIIToUTF16("Embiggen"))) {}
@@ skipping 38 matching lines @@
       controller_->ToggleMaximize();
   }
 
   FrameController* controller_;
   views::Button* close_button_;
   views::Button* maximize_button_;
 
   DISALLOW_COPY_AND_ASSIGN(LayoutManager);
 };
 
+class FrameController::FrameEventHandler : public ui::EventHandler {
+ public:
+  explicit FrameEventHandler(FrameController* frame_controller)
+      : frame_controller_(frame_controller) {}
+  virtual ~FrameEventHandler() {}
+
+ private:
+
+  // Overriden from ui::EventHandler:
+  virtual void OnMouseEvent(ui::MouseEvent* event) OVERRIDE {
+    if (event->type() == ui::ET_MOUSE_PRESSED)
+      frame_controller_->ActivateWindow();
+  }
+
+  FrameController* frame_controller_;
+
+  DISALLOW_COPY_AND_ASSIGN(FrameEventHandler);
+};
+
 ////////////////////////////////////////////////////////////////////////////////
 // FrameController, public:
 
-FrameController::FrameController(mojo::View* view, mojo::View** app_view)
+FrameController::FrameController(
+    mojo::View* view,
+    mojo::View** app_view,
+    aura::client::ActivationClient* activation_client,
+    mojo::WindowManagerApp* window_manager_app)
     : view_(view),
       app_view_(mojo::View::Create(view->view_manager())),
       frame_view_(new views::View),
       frame_view_layout_manager_(new LayoutManager(this)),
       widget_(new views::Widget),
-      maximized_(false) {
+      maximized_(false),
+      activation_client_(activation_client),
+      window_manager_app_(window_manager_app) {
   view_->AddChild(app_view_);
   view_->AddObserver(this);
   *app_view = app_view_;
   frame_view_->set_background(
       views::Background::CreateSolidBackground(SK_ColorBLUE));
   frame_view_->SetLayoutManager(frame_view_layout_manager_);
+  frame_event_handler_.reset(new FrameEventHandler(this));
+  frame_view_->AddPreTargetHandler(frame_event_handler_.get());
   views::Widget::InitParams params(
       views::Widget::InitParams::TYPE_WINDOW_FRAMELESS);
   params.native_widget = new mojo::NativeWidgetViewManager(widget_, view_);
   params.bounds = gfx::Rect(view_->bounds().size());
   widget_->Init(params);
   widget_->SetContentsView(frame_view_);
   widget_->Show();
 }
 
 FrameController::~FrameController() {}
 
 void FrameController::CloseWindow() {
   app_view_->Destroy();
   view_->Destroy();
 }
 
 void FrameController::ToggleMaximize() {
   if (!maximized_)
     restored_bounds_ = view_->bounds();
   maximized_ = !maximized_;
   if (maximized_)
     view_->SetBounds(view_->parent()->bounds());
   else
     view_->SetBounds(restored_bounds_);
 }
 
+void FrameController::ActivateWindow() {
+  aura::Window* window = window_manager_app_->GetWindowForViewId(view_->id());
+  activation_client_->ActivateWindow(window);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // FrameController, mojo::ViewObserver implementation:
 
 void FrameController::OnViewDestroyed(mojo::View* view) {
   view_->RemoveObserver(this);
   delete this;
 }