| // Copyright 2016 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 COMPONENTS_EXO_POINTER_STYLUS_DELEGATE_H_ |
| #define COMPONENTS_EXO_POINTER_STYLUS_DELEGATE_H_ |
| |
| #include "base/time/time.h" |
| #include "ui/events/event_constants.h" |
| |
| namespace gfx { |
| class Vector2dF; |
| } |
| |
| namespace exo { |
| class Pointer; |
| |
| // Handles tool-specific event details on pointers. Used as an extension to the |
| // PointerDelegate. |
| class PointerStylusDelegate { |
| public: |
| // Called at the top of the pointer's destructor, to give observers a |
| // chance to remove themselves. |
| virtual void OnPointerDestroying(Pointer* pointer) = 0; |
| |
| // Called when the type of pointer device changes. |
| virtual void OnPointerToolChange(ui::EventPointerType type) = 0; |
| |
| // Called when the force (pressure) of the pointer changes. |
| // Normalized to be [0, 1]. |
| virtual void OnPointerForce(base::TimeTicks time_stamp, float force) = 0; |
| |
| // Called when the tilt of a pen/stylus changes. Measured from surface normal |
| // as plane angle in degrees, values lie in [-90,90]. A positive x is to the |
| // right and a positive y is towards the user. |
| virtual void OnPointerTilt(base::TimeTicks time_stamp, |
| gfx::Vector2dF tilt) = 0; |
| |
| protected: |
| virtual ~PointerStylusDelegate() {} |
| }; |
| |
| } // namespace exo |
| |
| #endif // COMPONENTS_EXO_POINTER_STYLUS_DELEGATE_H_ |