ozone: Interpret absolute events for graphics tablets

ui/events/ozone/evdev/event_factory_evdev.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 "ui/events/ozone/evdev/event_factory_evdev.h"
 
 #include <fcntl.h>
 #include <linux/input.h>
 
 #include "base/debug/trace_event.h"
 #include "base/stl_util.h"
 #include "base/task_runner.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/threading/worker_pool.h"
 #include "ui/events/devices/device_data_manager.h"
 #include "ui/events/ozone/device/device_event.h"
 #include "ui/events/ozone/device/device_manager.h"
 #include "ui/events/ozone/evdev/cursor_delegate_evdev.h"
 #include "ui/events/ozone/evdev/event_converter_evdev_impl.h"
 #include "ui/events/ozone/evdev/event_device_info.h"
+#include "ui/events/ozone/evdev/tablet_event_converter_evdev.h"
 #include "ui/events/ozone/evdev/touch_event_converter_evdev.h"
 
 #if defined(USE_EVDEV_GESTURES)
 #include "ui/events/ozone/evdev/libgestures_glue/event_reader_libevdev_cros.h"
 #include "ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h"
 #include "ui/events/ozone/evdev/libgestures_glue/gesture_property_provider.h"
 #endif
 
 #ifndef EVIOCSCLOCKID
 #define EVIOCSCLOCKID  _IOW('E', 0xa0, int)
@@ skipping 59 matching lines @@
 #endif
 
   // Touchscreen: use TouchEventConverterEvdev.
   if (devinfo.HasMTAbsXY()) {
     scoped_ptr<TouchEventConverterEvdev> converter(new TouchEventConverterEvdev(
         fd, params.path, params.id, params.dispatch_callback));
     converter->Initialize(devinfo);
     return converter.Pass();
   }
 
+  // Graphics tablet
+  if (devinfo.HasAbsXY())
+    return make_scoped_ptr<EventConverterEvdev>(new TabletEventConverterEvdev(
+        fd, params.path, params.id, params.modifiers, params.cursor, devinfo,
+        params.dispatch_callback));
+
   // Everything else: use EventConverterEvdevImpl.
   return make_scoped_ptr<EventConverterEvdevImpl>(
       new EventConverterEvdevImpl(fd,
                                   params.path,
                                   params.id,
                                   params.modifiers,
                                   params.cursor,
                                   params.keyboard,
                                   params.dispatch_callback));
 }
@@ skipping 207 matching lines @@
   }
 
   observer->OnTouchscreenDevicesUpdated(touchscreens);
 }
 
 int EventFactoryEvdev::NextDeviceId() {
   return ++last_device_id_;
 }
 
 }  // namespace ui