| /* |
| * 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.animation.Animator; |
| import android.animation.ObjectAnimator; |
| import android.content.Context; |
| import android.content.res.TypedArray; |
| import android.graphics.drawable.Drawable; |
| import android.hardware.input.InputManager; |
| import android.os.Bundle; |
| import android.os.SystemClock; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.view.HapticFeedbackConstants; |
| import android.view.InputDevice; |
| import android.view.KeyCharacterMap; |
| import android.view.KeyEvent; |
| import android.view.MotionEvent; |
| import android.view.SoundEffectConstants; |
| import android.view.ViewConfiguration; |
| import android.view.accessibility.AccessibilityEvent; |
| import android.view.accessibility.AccessibilityNodeInfo; |
| import android.widget.ImageView; |
| |
| import com.android.systemui.R; |
| |
| import static android.view.accessibility.AccessibilityNodeInfo.ACTION_CLICK; |
| import static android.view.accessibility.AccessibilityNodeInfo.ACTION_LONG_CLICK; |
| |
| public class KeyButtonView extends ImageView { |
| private static final String TAG = "StatusBar.KeyButtonView"; |
| private static final boolean DEBUG = false; |
| |
| public static final float DEFAULT_QUIESCENT_ALPHA = 0.70f; |
| |
| private long mDownTime; |
| private int mCode; |
| private int mTouchSlop; |
| private float mDrawingAlpha = 1f; |
| private float mQuiescentAlpha = DEFAULT_QUIESCENT_ALPHA; |
| private boolean mSupportsLongpress = true; |
| private Animator mAnimateToQuiescent = new ObjectAnimator(); |
| private Drawable mBackground; |
| |
| private final Runnable mCheckLongPress = new Runnable() { |
| public void run() { |
| if (isPressed()) { |
| // Log.d("KeyButtonView", "longpressed: " + this); |
| if (isLongClickable()) { |
| // Just an old-fashioned ImageView |
| performLongClick(); |
| } else { |
| sendEvent(KeyEvent.ACTION_DOWN, KeyEvent.FLAG_LONG_PRESS); |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); |
| } |
| } |
| } |
| }; |
| |
| public KeyButtonView(Context context, AttributeSet attrs) { |
| this(context, attrs, 0); |
| } |
| |
| public KeyButtonView(Context context, AttributeSet attrs, int defStyle) { |
| super(context, attrs); |
| |
| TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.KeyButtonView, |
| defStyle, 0); |
| |
| mCode = a.getInteger(R.styleable.KeyButtonView_keyCode, 0); |
| |
| mSupportsLongpress = a.getBoolean(R.styleable.KeyButtonView_keyRepeat, true); |
| |
| Drawable d = getBackground(); |
| if (d != null) { |
| mBackground = d.mutate(); |
| setBackground(mBackground); |
| } |
| |
| setDrawingAlpha(mQuiescentAlpha); |
| |
| a.recycle(); |
| |
| setClickable(true); |
| mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop(); |
| } |
| |
| @Override |
| public void onInitializeAccessibilityNodeInfo(AccessibilityNodeInfo info) { |
| super.onInitializeAccessibilityNodeInfo(info); |
| if (mCode != 0) { |
| info.addAction(new AccessibilityNodeInfo.AccessibilityAction(ACTION_CLICK, null)); |
| if (mSupportsLongpress) { |
| info.addAction( |
| new AccessibilityNodeInfo.AccessibilityAction(ACTION_LONG_CLICK, null)); |
| } |
| } |
| } |
| |
| @Override |
| public boolean performAccessibilityAction(int action, Bundle arguments) { |
| if (action == ACTION_CLICK && mCode != 0) { |
| sendEvent(KeyEvent.ACTION_DOWN, 0, SystemClock.uptimeMillis()); |
| sendEvent(KeyEvent.ACTION_UP, 0); |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); |
| playSoundEffect(SoundEffectConstants.CLICK); |
| return true; |
| } else if (action == ACTION_LONG_CLICK && mCode != 0 && mSupportsLongpress) { |
| sendEvent(KeyEvent.ACTION_DOWN, KeyEvent.FLAG_LONG_PRESS); |
| sendEvent(KeyEvent.ACTION_UP, 0); |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED); |
| return true; |
| } |
| return super.performAccessibilityAction(action, arguments); |
| } |
| |
| public void setQuiescentAlpha(float alpha, boolean animate) { |
| mAnimateToQuiescent.cancel(); |
| alpha = Math.min(Math.max(alpha, 0), 1); |
| if (alpha == mQuiescentAlpha && alpha == mDrawingAlpha) return; |
| mQuiescentAlpha = alpha; |
| if (DEBUG) Log.d(TAG, "New quiescent alpha = " + mQuiescentAlpha); |
| if (mBackground != null && animate) { |
| mAnimateToQuiescent = animateToQuiescent(); |
| mAnimateToQuiescent.start(); |
| } else { |
| setDrawingAlpha(mQuiescentAlpha); |
| } |
| } |
| |
| private ObjectAnimator animateToQuiescent() { |
| return ObjectAnimator.ofFloat(this, "drawingAlpha", mQuiescentAlpha); |
| } |
| |
| public float getQuiescentAlpha() { |
| return mQuiescentAlpha; |
| } |
| |
| public float getDrawingAlpha() { |
| return mDrawingAlpha; |
| } |
| |
| public void setDrawingAlpha(float x) { |
| setImageAlpha((int) (x * 255)); |
| if (mBackground != null) { |
| mBackground.setAlpha((int)(x * 255)); |
| } |
| mDrawingAlpha = x; |
| } |
| |
| public void setPressed(boolean pressed) { |
| if (mBackground != null) { |
| if (pressed != isPressed()) { |
| if (pressed) { |
| setDrawingAlpha(1f); |
| } else { |
| mAnimateToQuiescent.cancel(); |
| mAnimateToQuiescent = animateToQuiescent(); |
| mAnimateToQuiescent.setDuration(500); |
| mAnimateToQuiescent.start(); |
| } |
| } |
| } |
| super.setPressed(pressed); |
| } |
| |
| private void setHotspot(float x, float y) { |
| if (mBackground != null) { |
| mBackground.setHotspot(x, y); |
| } |
| } |
| |
| public boolean onTouchEvent(MotionEvent ev) { |
| final int action = ev.getAction(); |
| int x, y; |
| |
| switch (action) { |
| case MotionEvent.ACTION_DOWN: |
| //Log.d("KeyButtonView", "press"); |
| mDownTime = SystemClock.uptimeMillis(); |
| setPressed(true); |
| if (mCode != 0) { |
| sendEvent(KeyEvent.ACTION_DOWN, 0, mDownTime); |
| } else { |
| // Provide the same haptic feedback that the system offers for virtual keys. |
| performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY); |
| } |
| if (mSupportsLongpress) { |
| removeCallbacks(mCheckLongPress); |
| postDelayed(mCheckLongPress, ViewConfiguration.getLongPressTimeout()); |
| } |
| setHotspot(ev.getX(), ev.getY()); |
| break; |
| case MotionEvent.ACTION_MOVE: |
| x = (int)ev.getX(); |
| y = (int)ev.getY(); |
| setPressed(x >= -mTouchSlop |
| && x < getWidth() + mTouchSlop |
| && y >= -mTouchSlop |
| && y < getHeight() + mTouchSlop); |
| setHotspot(ev.getX(), ev.getY()); |
| break; |
| case MotionEvent.ACTION_CANCEL: |
| setPressed(false); |
| if (mCode != 0) { |
| sendEvent(KeyEvent.ACTION_UP, KeyEvent.FLAG_CANCELED); |
| } |
| if (mSupportsLongpress) { |
| removeCallbacks(mCheckLongPress); |
| } |
| break; |
| case MotionEvent.ACTION_UP: |
| final boolean doIt = isPressed(); |
| setPressed(false); |
| if (mCode != 0) { |
| if (doIt) { |
| sendEvent(KeyEvent.ACTION_UP, 0); |
| sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED); |
| playSoundEffect(SoundEffectConstants.CLICK); |
| } else { |
| sendEvent(KeyEvent.ACTION_UP, KeyEvent.FLAG_CANCELED); |
| } |
| } else { |
| // no key code, just a regular ImageView |
| if (doIt) { |
| performClick(); |
| } |
| } |
| if (mSupportsLongpress) { |
| removeCallbacks(mCheckLongPress); |
| } |
| break; |
| } |
| |
| return true; |
| } |
| |
| public void sendEvent(int action, int flags) { |
| sendEvent(action, flags, SystemClock.uptimeMillis()); |
| } |
| |
| void sendEvent(int action, int flags, long when) { |
| final int repeatCount = (flags & KeyEvent.FLAG_LONG_PRESS) != 0 ? 1 : 0; |
| final KeyEvent ev = new KeyEvent(mDownTime, when, action, mCode, repeatCount, |
| 0, KeyCharacterMap.VIRTUAL_KEYBOARD, 0, |
| flags | KeyEvent.FLAG_FROM_SYSTEM | KeyEvent.FLAG_VIRTUAL_HARD_KEY, |
| InputDevice.SOURCE_KEYBOARD); |
| InputManager.getInstance().injectInputEvent(ev, |
| InputManager.INJECT_INPUT_EVENT_MODE_ASYNC); |
| } |
| } |
| |
| |