public void setExpandedHeight(float height) {
if (DEBUG) LOG("setExpandedHeight(%.1f)", height);
mRubberbanding = false;
if (mTimeAnimator.isRunning()) {
post(mStopAnimator);
}
setExpandedHeightInternal(height);
mBar.panelExpansionChanged(PanelView.this, mExpandedFraction);
}
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);
}
}
}
