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/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.settings.wifi;
import com.android.settings.R;
import android.net.wifi.WifiManager;
import android.preference.Preference;
import android.view.View;
import android.widget.ImageView;
public class AccessPointPreference extends Preference implements
AccessPointState.AccessPointStateCallback {
// UI states
private static final int[] STATE_ENCRYPTED = { R.attr.state_encrypted };
private static final int[] STATE_EMPTY = { };
// Signal strength indicator
private static final int UI_SIGNAL_LEVELS = 4;
private WifiSettings mWifiSettings;
private AccessPointState mState;
public AccessPointPreference(WifiSettings wifiSettings, AccessPointState state) {
super(wifiSettings, null);
mWifiSettings = wifiSettings;
mState = state;
setWidgetLayoutResource(R.layout.preference_widget_wifi_signal);
state.setCallback(this);
refresh();
}
public void refresh() {
setTitle(mState.getHumanReadableSsid());
setSummary(mState.getSummarizedStatus());
notifyChanged();
}
public void refreshAccessPointState() {
refresh();
// The ordering of access points could have changed due to the state change, so
// re-evaluate ordering
notifyHierarchyChanged();
}
@Override
protected void onBindView(View view) {
super.onBindView(view);
ImageView signal = (ImageView) view.findViewById(R.id.signal);
if (mState.seen) {
signal.setImageResource(R.drawable.wifi_signal);
signal.setImageState(mState.hasSecurity() ? STATE_ENCRYPTED : STATE_EMPTY, true);
signal.setImageLevel(getUiSignalLevel());
} else {
signal.setImageDrawable(null);
}
}
private int getUiSignalLevel() {
return mState != null ? WifiManager.calculateSignalLevel(mState.signal, UI_SIGNAL_LEVELS)
: 0;
}
/**
* Returns the {@link AccessPointState} associated with this preference.
* @return The {@link AccessPointState}.
*/
public AccessPointState getAccessPointState() {
return mState;
}
@Override
public int compareTo(Preference another) {
if (!(another instanceof AccessPointPreference)) {
// Let normal preferences go before us.
// NOTE: we should only be compared to Preference in our
// category.
return 1;
}
return mState.compareTo(((AccessPointPreference) another).mState);
}
}
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