Add a basic sky-scrollable element that scrolls

sky/viewer/converters/input_event_types.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 "sky/viewer/converters/input_event_types.h"
 
 #include "base/logging.h"
 #include "base/time/time.h"
 #include "mojo/services/input_events/public/interfaces/input_event_constants.mojom.h"
 #include "sky/engine/public/platform/WebInputEvent.h"
@@ skipping 83 matching lines @@
 
   switch (event->action) {
     case mojo::EVENT_TYPE_GESTURE_SCROLL_BEGIN:
       web_event->type = blink::WebInputEvent::GestureScrollBegin;
       break;
     case mojo::EVENT_TYPE_GESTURE_SCROLL_END:
       web_event->type = blink::WebInputEvent::GestureScrollEnd;
       break;
     case mojo::EVENT_TYPE_GESTURE_SCROLL_UPDATE:
       web_event->type = blink::WebInputEvent::GestureScrollUpdate;
-      web_event->data.scrollUpdate.deltaX = event->gesture_data->scroll_x;
-      web_event->data.scrollUpdate.deltaY = event->gesture_data->scroll_y;
+      web_event->data.scrollUpdate.deltaX =
+          event->gesture_data->scroll_x / device_pixel_ratio;
+      web_event->data.scrollUpdate.deltaY =
+          event->gesture_data->scroll_y / device_pixel_ratio;
       break;
     case mojo::EVENT_TYPE_SCROLL_FLING_START:
       web_event->type = blink::WebInputEvent::GestureFlingStart;
-      web_event->data.flingStart.velocityX = event->gesture_data->velocity_x;
-      web_event->data.flingStart.velocityY = event->gesture_data->velocity_y;
+      web_event->data.flingStart.velocityX =
+          event->gesture_data->velocity_x / device_pixel_ratio;
+      web_event->data.flingStart.velocityY =
+          event->gesture_data->velocity_y / device_pixel_ratio;
       break;
     case mojo::EVENT_TYPE_SCROLL_FLING_CANCEL:
       web_event->type = blink::WebInputEvent::GestureFlingCancel;
       break;
     case mojo::EVENT_TYPE_GESTURE_SHOW_PRESS:
       web_event->type = blink::WebInputEvent::GestureShowPress;
       break;
     case mojo::EVENT_TYPE_GESTURE_TAP:
       web_event->type = blink::WebInputEvent::GestureTap;
       web_event->data.tap.tapCount = event->gesture_data->tap_count;
@@ skipping 22 matching lines @@
       web_event->type = blink::WebInputEvent::GestureLongTap;
       break;
     case mojo::EVENT_TYPE_GESTURE_PINCH_BEGIN:
       web_event->type = blink::WebInputEvent::GesturePinchBegin;
       break;
     case mojo::EVENT_TYPE_GESTURE_PINCH_END:
       web_event->type = blink::WebInputEvent::GesturePinchEnd;
       break;
     case mojo::EVENT_TYPE_GESTURE_PINCH_UPDATE:
       web_event->type = blink::WebInputEvent::GesturePinchUpdate;
-      web_event->data.pinchUpdate.scale = event->gesture_data->scale;
+      web_event->data.pinchUpdate.scale =
+          event->gesture_data->scale / device_pixel_ratio;
       break;
     default:
       NOTIMPLEMENTED() << "Received unexpected event: " << event->action;
       break;
   }
 
   web_event->x = event->location_data->in_view_location->x / device_pixel_ratio;
   web_event->y = event->location_data->in_view_location->y / device_pixel_ratio;
 
   // TODO(erg): Remove this null check as parallel to above.
@@ skipping 72 matching lines @@
   } else if ((event->action == mojo::EVENT_TYPE_KEY_PRESSED ||
               event->action == mojo::EVENT_TYPE_KEY_RELEASED) &&
              event->key_data) {
     return BuildWebKeyboardEvent(event, device_pixel_ratio);
   }
 
   return scoped_ptr<blink::WebInputEvent>();
 }
 
 }  // namespace mojo