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// -*- Mode: C++; indent-tabs-mode: nil; tab-width: 2 -*-
/*
* Copyright (C) 2011 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* Authored by: Brandon Schaefer <brandon.schaefer@canonical.com>
*/
#include "DeltaTracker.h"
namespace unity
{
DeltaTracker::DeltaTracker()
: delta_state_(DeltaState::NONE)
{
}
void DeltaTracker::HandleNewMouseDelta(int dx, int dy)
{
if (dx > 0)
{
delta_state_ |= DeltaState::RIGHT;
}
else if (dx < 0)
{
delta_state_ |= DeltaState::LEFT;
}
if (dy > 0)
{
delta_state_ |= DeltaState::DOWN;
}
else if (dy < 0)
{
delta_state_ |= DeltaState::UP;
}
}
void DeltaTracker::ResetState()
{
delta_state_ = DeltaState::NONE;
}
unsigned int DeltaTracker::AmountOfDirectionsChanged() const
{
unsigned int directions_changed = 0;
if (HasState(DeltaState::RIGHT))
directions_changed++;
if (HasState(DeltaState::LEFT))
directions_changed++;
if (HasState(DeltaState::UP))
directions_changed++;
if (HasState(DeltaState::DOWN))
directions_changed++;
return directions_changed;
}
bool DeltaTracker::HasState(DeltaState const& state) const
{
return (delta_state_ & state);
}
}
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