| /* |
| * Copyright (C) 2012 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.animation.ObjectAnimator; |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.Canvas; |
| import android.os.SystemClock; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.view.MotionEvent; |
| import android.view.View; |
| |
| import com.android.systemui.R; |
| |
| public class DeadZone extends View { |
| public static final String TAG = "DeadZone"; |
| |
| public static final boolean DEBUG = false; |
| public static final int HORIZONTAL = 0; |
| public static final int VERTICAL = 1; |
| |
| private static final boolean CHATTY = true; // print to logcat when we eat a click |
| |
| private boolean mShouldFlash; |
| private float mFlashFrac = 0f; |
| |
| private int mSizeMax; |
| private int mSizeMin; |
| // Upon activity elsewhere in the UI, the dead zone will hold steady for |
| // mHold ms, then move back over the course of mDecay ms |
| private int mHold, mDecay; |
| private boolean mVertical; |
| private long mLastPokeTime; |
| |
| private final Runnable mDebugFlash = new Runnable() { |
| @Override |
| public void run() { |
| ObjectAnimator.ofFloat(DeadZone.this, "flash", 1f, 0f).setDuration(150).start(); |
| } |
| }; |
| |
| public DeadZone(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public DeadZone(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs); |
| |
| TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.DeadZone, |
| defStyle, 0); |
| |
| mHold = a.getInteger(R.styleable.DeadZone_holdTime, 0); |
| mDecay = a.getInteger(R.styleable.DeadZone_decayTime, 0); |
| |
| mSizeMin = a.getDimensionPixelSize(R.styleable.DeadZone_minSize, 0); |
| mSizeMax = a.getDimensionPixelSize(R.styleable.DeadZone_maxSize, 0); |
| |
| int index = a.getInt(R.styleable.DeadZone_orientation, -1); |
| mVertical = (index == VERTICAL); |
| |
| if (DEBUG) |
| Log.v(TAG, this + " size=[" + mSizeMin + "-" + mSizeMax + "] hold=" + mHold |
| + (mVertical ? " vertical" : " horizontal")); |
| |
| setFlashOnTouchCapture(context.getResources().getBoolean(R.bool.config_dead_zone_flash)); |
| } |
| |
| static float lerp(float a, float b, float f) { |
| return (b - a) * f + a; |
| } |
| |
| private float getSize(long now) { |
| if (mSizeMax == 0) |
| return 0; |
| long dt = (now - mLastPokeTime); |
| if (dt > mHold + mDecay) |
| return mSizeMin; |
| if (dt < mHold) |
| return mSizeMax; |
| return (int) lerp(mSizeMax, mSizeMin, (float) (dt - mHold) / mDecay); |
| } |
| |
| public void setFlashOnTouchCapture(boolean dbg) { |
| mShouldFlash = dbg; |
| mFlashFrac = 0f; |
| postInvalidate(); |
| } |
| |
| // I made you a touch event... |
| @Override |
| public boolean onTouchEvent(MotionEvent event) { |
| if (DEBUG) { |
| Log.v(TAG, this + " onTouch: " + MotionEvent.actionToString(event.getAction())); |
| } |
| |
| final int action = event.getAction(); |
| if (action == MotionEvent.ACTION_OUTSIDE) { |
| poke(event); |
| } else if (action == MotionEvent.ACTION_DOWN) { |
| if (DEBUG) { |
| Log.v(TAG, this + " ACTION_DOWN: " + event.getX() + "," + event.getY()); |
| } |
| int size = (int) getSize(event.getEventTime()); |
| if ((mVertical && event.getX() < size) || event.getY() < size) { |
| if (CHATTY) { |
| Log.v(TAG, "consuming errant click: (" + event.getX() + "," + event.getY() + ")"); |
| } |
| if (mShouldFlash) { |
| post(mDebugFlash); |
| postInvalidate(); |
| } |
| return true; // ...but I eated it |
| } |
| } |
| return false; |
| } |
| |
| public void poke(MotionEvent event) { |
| mLastPokeTime = event.getEventTime(); |
| if (DEBUG) |
| Log.v(TAG, "poked! size=" + getSize(mLastPokeTime)); |
| if (mShouldFlash) postInvalidate(); |
| } |
| |
| public void setFlash(float f) { |
| mFlashFrac = f; |
| postInvalidate(); |
| } |
| |
| public float getFlash() { |
| return mFlashFrac; |
| } |
| |
| @Override |
| public void onDraw(Canvas can) { |
| if (!mShouldFlash || mFlashFrac <= 0f) { |
| return; |
| } |
| |
| final int size = (int) getSize(SystemClock.uptimeMillis()); |
| can.clipRect(0, 0, mVertical ? size : can.getWidth(), mVertical ? can.getHeight() : size); |
| final float frac = DEBUG ? (mFlashFrac - 0.5f) + 0.5f : mFlashFrac; |
| can.drawARGB((int) (frac * 0xFF), 0xDD, 0xEE, 0xAA); |
| |
| if (DEBUG && size > mSizeMin) |
| // crazy aggressive redrawing here, for debugging only |
| postInvalidateDelayed(100); |
| } |
| } |