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// Copyright (c) 2012 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 ASH_SYSTEM_NETWORK_TRAY_NETWORK_STATE_OBSERVER_H_
#define ASH_SYSTEM_NETWORK_TRAY_NETWORK_STATE_OBSERVER_H_
#include "base/macros.h"
#include "base/timer/timer.h"
#include "chromeos/network/network_state_handler_observer.h"
namespace ash {
class TrayNetworkStateObserver : public chromeos::NetworkStateHandlerObserver {
public:
class Delegate {
public:
// Called when any interesting network changes occur. The frequency of this
// event is limited to kUpdateFrequencyMs.
virtual void NetworkStateChanged(bool notify_a11y) = 0;
protected:
virtual ~Delegate() {}
};
explicit TrayNetworkStateObserver(Delegate* delegate);
~TrayNetworkStateObserver() override;
// NetworkStateHandlerObserver overrides.
void NetworkListChanged() override;
void DeviceListChanged() override;
void DefaultNetworkChanged(const chromeos::NetworkState* network) override;
void NetworkConnectionStateChanged(
const chromeos::NetworkState* network) override;
void NetworkPropertiesUpdated(const chromeos::NetworkState* network) override;
void DevicePropertiesUpdated(const chromeos::DeviceState* device) override;
private:
void SignalUpdate(bool notify_a11y);
void SendNetworkStateChanged(bool notify_a11y);
// Unowned Delegate pointer (must outlive this instance).
Delegate* delegate_;
// Set to true when we should purge stale icons in the cache.
bool purge_icons_;
// Frequency at which to push NetworkStateChanged updates. This avoids
// unnecessarily frequent UI updates (which can be expensive). We set this
// to 0 for tests to eliminate timing variance.
int update_frequency_;
// Timer used to limit the frequency of NetworkStateChanged updates.
base::OneShotTimer timer_;
// The previous state of the wifi network, used to immediately send
// NetworkStateChanged update when wifi changed from enabled->disabled.
bool wifi_enabled_ = false;
DISALLOW_COPY_AND_ASSIGN(TrayNetworkStateObserver);
};
} // namespace ash
#endif // ASH_SYSTEM_NETWORK_TRAY_NETWORK_STATE_OBSERVER_H_