blob: b4ee3406d8a2c39f7d9703ee8d8e2551c6d15f21 [file] [log] [blame]
// 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.
#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 {
// 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;
virtual ~PointerStylusDelegate() {}
} // namespace exo