Wire input events through the ViewManagerClient interface.

mojo/examples/sample_view_manager_app/sample_view_manager_app.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 "base/at_exit.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
+#include "base/strings/stringprintf.h"
 #include "mojo/public/cpp/application/application.h"
 #include "mojo/public/cpp/environment/environment.h"
 #include "mojo/public/cpp/system/core.h"
 #include "mojo/public/cpp/system/macros.h"
 #include "mojo/public/cpp/utility/run_loop.h"
 #include "mojo/services/public/cpp/view_manager/view.h"
 #include "mojo/services/public/cpp/view_manager/view_manager.h"
+#include "mojo/services/public/cpp/view_manager/view_observer.h"
 #include "mojo/services/public/cpp/view_manager/view_tree_node.h"
+#include "ui/events/event_constants.h"
 #include "ui/gfx/canvas.h"
 
 #if defined(WIN32)
 #if !defined(CDECL)
 #define CDECL __cdecl
 #endif
 #define SAMPLE_APP_EXPORT __declspec(dllexport)
 #else
 #define CDECL
 #define SAMPLE_APP_EXPORT __attribute__((visibility("default")))
 #endif
 
 namespace mojo {
 namespace examples {
 
-class SampleApp : public Application {
+namespace {
+
+std::string EventNameForAction(int32_t action) {
+  switch (action) {
+    case ui::ET_MOUSE_MOVED:
+      return "MouseMoved";
+    case ui::ET_MOUSE_PRESSED:
+      return "MousePressed";
+    case ui::ET_MOUSE_RELEASED:
+      return "MouseReleased";
+    case ui::ET_MOUSE_DRAGGED:
+      return "MouseDragged";
+    case ui::ET_KEY_PRESSED:
+      return "KeyPressed";
+    case ui::ET_KEY_RELEASED:
+      return "KeyReleased";
+    case ui::ET_TOUCH_PRESSED:
+      return "TouchPressed";
+    case ui::ET_TOUCH_RELEASED:
+      return "TouchReleased";
+    case ui::ET_TOUCH_MOVED:
+      return "TouchMoved";
+  }
+  return "Other";
+}
+
+}

[sky, 2014/05/28 19:32:57]

nit:  // namespace

+
+class SampleApp : public Application, public mojo::view_manager::ViewObserver {
  public:
   explicit SampleApp(MojoHandle service_provider_handle)
       : Application(service_provider_handle) {
     view_manager_.reset(new view_manager::ViewManager(service_provider()));
     view_manager_->Init();
     view_manager::ViewTreeNode* node1 =
         view_manager::ViewTreeNode::Create(view_manager_.get());
+    node1->SetBounds(gfx::Rect(800, 600));
     view_manager::ViewTreeNode* node11 =
         view_manager::ViewTreeNode::Create(view_manager_.get());
     node11->SetBounds(gfx::Rect(800, 600));
 
     view_manager::View* view11 =
         view_manager::View::Create(view_manager_.get());
     node11->SetActiveView(view11);
     view_manager_->tree()->AddChild(node1);
     node1->AddChild(node11);
 
     gfx::Canvas canvas(gfx::Size(800, 600), 1.0f, true);
     canvas.DrawColor(SK_ColorRED);
     view11->SetContents(
         skia::GetTopDevice(*canvas.sk_canvas())->accessBitmap(true));
+
+    view11->AddObserver(this);
   }
 
   virtual ~SampleApp() {
   }
 
  private:
+  virtual void OnViewInputEvent(mojo::view_manager::View* view,
+                                const Event& event) OVERRIDE {
+    std::string event_name = EventNameForAction(event.action());
+    if (!event.location().is_null()) {
+      LOG(WARNING) << base::StringPrintf("Got %s @ %d,%d",
+                                         event_name.c_str(),
+                                         event.location().x(),
+                                         event.location().y());
+    } else {
+      LOG(WARNING) << base::StringPrintf("Got %s", event_name.c_str());
+    }
+  }
+
   // SampleApp creates a ViewManager and a trivial node hierarchy.
   scoped_ptr<view_manager::ViewManager> view_manager_;
 
   DISALLOW_COPY_AND_ASSIGN(SampleApp);
 };
 
 }  // namespace examples
 }  // namespace mojo
 
 extern "C" SAMPLE_APP_EXPORT MojoResult CDECL MojoMain(
     MojoHandle service_provider_handle) {
   base::MessageLoop loop;
 
   mojo::examples::SampleApp app(service_provider_handle);
   loop.Run();
   return MOJO_RESULT_OK;
 }