2 files changed, 116 insertions, 0 deletions
diff --git a/views/touchui/gesture_manager.cc b/views/touchui/gesture_manager.cc
new file mode 100644
index 0000000..7123519
--- /dev/null
+++ b/views/touchui/gesture_manager.cc
@@ -0,0 +1,62 @@
+// Copyright (c) 2010 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 "views/touchui/gesture_manager.h"
+#ifndef NDEBUG
+#include <iostream>
+#endif
+
+#include "base/logging.h"
+#include "views/event.h"
+#include "views/view.h"
+
+namespace views {
+
+GestureManager::~GestureManager() {
+}
+
+GestureManager* GestureManager::Get() {
+  return Singleton<GestureManager>::get();
+}
+
+bool GestureManager::ProcessTouchEventForGesture(const TouchEvent& event,
+                                                 View* source,
+                                                 bool previouslyHandled) {
+  // TODO(rjkroege): A realistic version of the GestureManager will
+  // appear in a subsequent CL. This interim version permits verifying that the
+  // event distirbution code works by turning all touch inputs into
+  // mouse approximations.
+  bool handled = false;
+  if (event.GetType() == Event::ET_TOUCH_PRESSED) {
+    DLOG(INFO) << "GestureManager::ProcessTouchEventForGesture: " <<
+        "TouchPressed\n";
+    MouseEvent mouse_event(Event::ET_MOUSE_PRESSED, event.x(), event.y(),
+                           event.GetFlags());
+    source->OnMousePressed(mouse_event);
+    handled = true;
+  } else if (event.GetType() == Event::ET_TOUCH_RELEASED) {
+    DLOG(INFO) << "GestureManager::ProcessTouchEventForGesture: " <<
+        "TouchReleased\n";
+    MouseEvent mouse_event(Event::ET_MOUSE_RELEASED, event.x(), event.y(),
+                           event.GetFlags());
+    source->OnMouseReleased(mouse_event, false);
+    handled = true;
+  } else if (event.GetType() == Event::ET_TOUCH_MOVED) {
+    DLOG(INFO) << "GestureManager::ProcessTouchEventForGesture: " <<
+        "TouchMotion\n";
+    MouseEvent mouse_event(Event::ET_MOUSE_DRAGGED, event.x(), event.y(),
+                           event.GetFlags());
+    source->OnMouseDragged(mouse_event);
+    handled = true;
+  } else {
+    DLOG(INFO) << "GestureManager::ProcessTouchEventForGesture: " <<
+        "unhandled event\n";
+  }
+  return handled;
+}
+
+GestureManager::GestureManager() {
+}
+
+}  // namespace views
diff --git a/views/touchui/gesture_manager.h b/views/touchui/gesture_manager.h
new file mode 100644
index 0000000..2b905d3
--- /dev/null
+++ b/views/touchui/gesture_manager.h
@@ -0,0 +1,54 @@
+// Copyright (c) 2010 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.
+
+#ifndef VIEWS_TOUCHUI_GESTURE_MANAGER_H_
+#define VIEWS_TOUCHUI_GESTURE_MANAGER_H_
+#pragma once
+
+#include "base/singleton.h"
+
+namespace views {
+class View;
+class TouchEvent;
+
+
+// A GestureManager singleton detects gestures occurring in the
+// incoming feed of touch events across all of the RootViews in
+// the system. In response to a given touch event, the GestureManager
+// updates its internal state and optionally dispatches synthetic
+// events to the invoking view.
+//
+class GestureManager {
+ public:
+  virtual ~GestureManager();
+
+  static GestureManager* Get();
+
+  // Invoked for each touch event that could contribute to the current gesture.
+  // Takes the event and the View that originated it and which will also
+  // be the target of any generated synthetic event. Finally, handled
+  // specifies if the event was actually handled explicitly by a view so that
+  // GestureManager state can correctly reflect events that are handled
+  // already.
+  // Returns true if the event resulted in firing a synthetic event.
+  virtual bool ProcessTouchEventForGesture(const TouchEvent& event,
+                                           View* source,
+                                           bool previouslyHandled);
+
+  // TODO(rjkroege): Write the remainder of this class.
+  // It will appear in a subsequent CL.
+
+ protected:
+  GestureManager();
+
+ private:
+  friend struct DefaultSingletonTraits<GestureManager>;
+
+  DISALLOW_COPY_AND_ASSIGN(GestureManager);
+};
+
+
+}  // namespace views
+
+#endif  // VIEWS_TOUCHUI_GESTURE_MANAGER_H_