| /* |
| * Copyright (C) 2008 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.systemui.statusbar.policy; |
| |
| import android.content.BroadcastReceiver; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.IntentFilter; |
| import android.text.format.DateFormat; |
| import android.util.AttributeSet; |
| import android.view.View; |
| import android.view.ViewParent; |
| import android.widget.TextView; |
| |
| import com.android.systemui.R; |
| |
| import java.util.Date; |
| |
| public class DateView extends TextView { |
| private static final String TAG = "DateView"; |
| |
| private boolean mAttachedToWindow; |
| private boolean mWindowVisible; |
| private boolean mUpdating; |
| |
| private BroadcastReceiver mIntentReceiver = new BroadcastReceiver() { |
| @Override |
| public void onReceive(Context context, Intent intent) { |
| final String action = intent.getAction(); |
| if (Intent.ACTION_TIME_TICK.equals(action) |
| || Intent.ACTION_TIME_CHANGED.equals(action) |
| || Intent.ACTION_TIMEZONE_CHANGED.equals(action)) { |
| updateClock(); |
| } |
| } |
| }; |
| |
| public DateView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| mAttachedToWindow = true; |
| setUpdates(); |
| } |
| |
| @Override |
| protected void onDetachedFromWindow() { |
| super.onDetachedFromWindow(); |
| mAttachedToWindow = false; |
| setUpdates(); |
| } |
| |
| @Override |
| protected void onWindowVisibilityChanged(int visibility) { |
| super.onWindowVisibilityChanged(visibility); |
| mWindowVisible = visibility == VISIBLE; |
| setUpdates(); |
| } |
| |
| @Override |
| protected void onVisibilityChanged(View changedView, int visibility) { |
| super.onVisibilityChanged(changedView, visibility); |
| setUpdates(); |
| } |
| |
| @Override |
| protected int getSuggestedMinimumWidth() { |
| // makes the large background bitmap not force us to full width |
| return 0; |
| } |
| |
| protected void updateClock() { |
| final String dateFormat = getContext().getString(R.string.abbrev_wday_month_day_no_year); |
| setText(DateFormat.format(dateFormat, new Date())); |
| } |
| |
| private boolean isVisible() { |
| View v = this; |
| while (true) { |
| if (v.getVisibility() != VISIBLE) { |
| return false; |
| } |
| final ViewParent parent = v.getParent(); |
| if (parent instanceof View) { |
| v = (View)parent; |
| } else { |
| return true; |
| } |
| } |
| } |
| |
| private void setUpdates() { |
| boolean update = mAttachedToWindow && mWindowVisible && isVisible(); |
| if (update != mUpdating) { |
| mUpdating = update; |
| if (update) { |
| // Register for Intent broadcasts for the clock and battery |
| IntentFilter filter = new IntentFilter(); |
| filter.addAction(Intent.ACTION_TIME_TICK); |
| filter.addAction(Intent.ACTION_TIME_CHANGED); |
| filter.addAction(Intent.ACTION_TIMEZONE_CHANGED); |
| mContext.registerReceiver(mIntentReceiver, filter, null, null); |
| updateClock(); |
| } else { |
| mContext.unregisterReceiver(mIntentReceiver); |
| } |
| } |
| } |
| } |