public SoundLevels(final Context context, final AttributeSet attrs, final int defStyle) {
super(context, attrs, defStyle);
// Safe source, replaced with system one when attached.
mLevelSource = new AudioLevelSource();
mLevelSource.setSpeechLevel(0);
final TypedArray a =
context.obtainStyledAttributes(attrs, R.styleable.SoundLevels, defStyle, 0);
mMaximumLevelSize = a.getDimensionPixelOffset(R.styleable.SoundLevels_maxLevelRadius, 0);
mMinimumLevelSize = a.getDimensionPixelOffset(R.styleable.SoundLevels_minLevelRadius, 0);
mMinimumLevel = mMinimumLevelSize / mMaximumLevelSize;
mPrimaryLevelPaint = new Paint();
mPrimaryLevelPaint.setColor(a.getColor(R.styleable.SoundLevels_primaryColor, Color.BLACK));
mPrimaryLevelPaint.setFlags(Paint.ANTI_ALIAS_FLAG);
a.recycle();
// This animator generates ticks that invalidate the
// view so that the animation is synced with the global animation loop.
// TODO: We could probably remove this in favor of using postInvalidateOnAnimation
// which might improve things further.
mSpeechLevelsAnimator = new TimeAnimator();
mSpeechLevelsAnimator.setRepeatCount(ObjectAnimator.INFINITE);
mSpeechLevelsAnimator.setTimeListener(
new TimeListener() {
@Override
public void onTimeUpdate(
final TimeAnimator animation, final long totalTime, final long deltaTime) {
invalidate();
}
});
}
public PanelView(Context context, AttributeSet attrs) {
super(context, attrs);
mTimeAnimator = new TimeAnimator();
mTimeAnimator.setTimeListener(mAnimationCallback);
}
private void animationTick(long dtms) {
if (!mTimeAnimator.isStarted()) {
// XXX HAX to work around bug in TimeAnimator.end() not resetting its last time
mTimeAnimator = new TimeAnimator();
mTimeAnimator.setTimeListener(mAnimationCallback);
if (mPeekAnimator != null) mPeekAnimator.cancel();
mTimeAnimator.start();
mRubberbanding =
mRubberbandingEnabled // is it enabled at all?
&& mExpandedHeight > getFullHeight() // are we past the end?
&& mVel >= -mFlingGestureMinDistPx; // was this not possibly a "close" gesture?
if (mRubberbanding) {
mClosing = true;
} else if (mVel == 0) {
// if the panel is less than halfway open, close it
mClosing = (mFinalTouchY / getFullHeight()) < 0.5f;
} else {
mClosing = mExpandedHeight > 0 && mVel < 0;
}
} else if (dtms > 0) {
final float dt = dtms * 0.001f; // ms -> s
if (DEBUG) LOG("tick: v=%.2fpx/s dt=%.4fs", mVel, dt);
if (DEBUG) LOG("tick: before: h=%d", (int) mExpandedHeight);
final float fh = getFullHeight();
boolean braking = false;
if (BRAKES) {
if (mClosing) {
braking = mExpandedHeight <= mCollapseBrakingDistancePx;
mAccel = braking ? 10 * mCollapseAccelPx : -mCollapseAccelPx;
} else {
braking = mExpandedHeight >= (fh - mExpandBrakingDistancePx);
mAccel = braking ? 10 * -mExpandAccelPx : mExpandAccelPx;
}
} else {
mAccel = mClosing ? -mCollapseAccelPx : mExpandAccelPx;
}
mVel += mAccel * dt;
if (braking) {
if (mClosing && mVel > -mBrakingSpeedPx) {
mVel = -mBrakingSpeedPx;
} else if (!mClosing && mVel < mBrakingSpeedPx) {
mVel = mBrakingSpeedPx;
}
} else {
if (mClosing && mVel > -mFlingCollapseMinVelocityPx) {
mVel = -mFlingCollapseMinVelocityPx;
} else if (!mClosing && mVel > mFlingGestureMaxOutputVelocityPx) {
mVel = mFlingGestureMaxOutputVelocityPx;
}
}
float h = mExpandedHeight + mVel * dt;
if (mRubberbanding && h < fh) {
h = fh;
}
if (DEBUG) LOG("tick: new h=%d closing=%s", (int) h, mClosing ? "true" : "false");
setExpandedHeightInternal(h);
mBar.panelExpansionChanged(PanelView.this, mExpandedFraction);
if (mVel == 0
|| (mClosing && mExpandedHeight == 0)
|| ((mRubberbanding || !mClosing) && mExpandedHeight == fh)) {
post(mStopAnimator);
}
}
}