/*
* Copyright (C) 2014 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.recents.misc;
import android.os.Handler;
import android.os.SystemClock;
import android.view.KeyEvent;
import com.android.systemui.recents.Constants;
/**
* A trigger for catching a debug chord.
* We currently use volume up then volume down to trigger this mode.
*/
public class DebugTrigger {
Handler mHandler;
Runnable mTriggeredRunnable;
int mLastKeyCode;
long mLastKeyCodeTime;
public DebugTrigger(Runnable triggeredRunnable) {
mHandler = new Handler();
mTriggeredRunnable = triggeredRunnable;
}
/** Resets the debug trigger */
void reset() {
mLastKeyCode = 0;
mLastKeyCodeTime = 0;
}
/**
* Processes a key event and tests if it is a part of the trigger. If the chord is complete,
* then we just call the callback.
*/
public void onKeyEvent(int keyCode) {
if (!Constants.DebugFlags.App.EnableDebugMode) return;
if (mLastKeyCode == 0) {
if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) {
mLastKeyCode = keyCode;
mLastKeyCodeTime = SystemClock.uptimeMillis();
return;
}
} else {
if (mLastKeyCode == KeyEvent.KEYCODE_VOLUME_UP &&
keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) {
if ((SystemClock.uptimeMillis() - mLastKeyCodeTime) < 750) {
mTriggeredRunnable.run();
}
}
}
reset();
}
}