// Rubberbands the panel to hold its contents.
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
super.onMeasure(widthMeasureSpec, heightMeasureSpec);
if (DEBUG)
LOG(
"onMeasure(%d, %d) -> (%d, %d)",
widthMeasureSpec, heightMeasureSpec, getMeasuredWidth(), getMeasuredHeight());
// Did one of our children change size?
int newHeight = getMeasuredHeight();
if (newHeight != mFullHeight) {
mFullHeight = newHeight;
// If the user isn't actively poking us, let's rubberband to the content
if (!mTracking
&& !mRubberbanding
&& !mTimeAnimator.isStarted()
&& mExpandedHeight > 0
&& mExpandedHeight != mFullHeight) {
mExpandedHeight = mFullHeight;
}
}
heightMeasureSpec =
MeasureSpec.makeMeasureSpec(
(int) mExpandedHeight, MeasureSpec.AT_MOST); // MeasureSpec.getMode(heightMeasureSpec));
setMeasuredDimension(widthMeasureSpec, heightMeasureSpec);
}
private void stopSpeechLevelsAnimator() {
if (DEBUG) {
Log.d(TAG, "stopAnimator()");
}
if (mSpeechLevelsAnimator.isStarted()) {
mSpeechLevelsAnimator.end();
}
}
private void startSpeechLevelsAnimator() {
if (DEBUG) {
Log.d(TAG, "startAnimator()");
}
if (!mSpeechLevelsAnimator.isStarted()) {
mSpeechLevelsAnimator.start();
}
}
@Override
public void run() {
if (mTimeAnimator != null && mTimeAnimator.isStarted()) {
mTimeAnimator.end();
mRubberbanding = false;
mClosing = false;
}
}
private void runPeekAnimation() {
if (DEBUG) LOG("peek to height=%.1f", mPeekHeight);
if (mTimeAnimator.isStarted()) {
return;
}
if (mPeekAnimator == null) {
mPeekAnimator = ObjectAnimator.ofFloat(this, "expandedHeight", mPeekHeight).setDuration(250);
}
mPeekAnimator.start();
}
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);
}
}
}