| /* |
| * 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.phone; |
| |
| import android.animation.ObjectAnimator; |
| import android.animation.TimeAnimator; |
| import android.animation.TimeAnimator.TimeListener; |
| import android.content.Context; |
| import android.content.res.Resources; |
| import android.util.AttributeSet; |
| import android.util.Log; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewConfiguration; |
| import android.widget.FrameLayout; |
| |
| import com.android.systemui.R; |
| |
| import java.io.FileDescriptor; |
| import java.io.PrintWriter; |
| import java.util.ArrayDeque; |
| import java.util.Iterator; |
| |
| public class PanelView extends FrameLayout { |
| public static final boolean DEBUG = PanelBar.DEBUG; |
| public static final String TAG = PanelView.class.getSimpleName(); |
| |
| public static final boolean DEBUG_NAN = true; // http://b/7686690 |
| |
| private final void logf(String fmt, Object... args) { |
| Log.v(TAG, (mViewName != null ? (mViewName + ": ") : "") + String.format(fmt, args)); |
| } |
| |
| public static final boolean BRAKES = false; |
| private boolean mRubberbandingEnabled = true; |
| |
| private float mSelfExpandVelocityPx; // classic value: 2000px/s |
| private float mSelfCollapseVelocityPx; // classic value: 2000px/s (will be negated to collapse "up") |
| private float mFlingExpandMinVelocityPx; // classic value: 200px/s |
| private float mFlingCollapseMinVelocityPx; // classic value: 200px/s |
| private float mCollapseMinDisplayFraction; // classic value: 0.08 (25px/min(320px,480px) on G1) |
| private float mExpandMinDisplayFraction; // classic value: 0.5 (drag open halfway to expand) |
| private float mFlingGestureMaxXVelocityPx; // classic value: 150px/s |
| |
| private float mFlingGestureMinDistPx; |
| |
| private float mExpandAccelPx; // classic value: 2000px/s/s |
| private float mCollapseAccelPx; // classic value: 2000px/s/s (will be negated to collapse "up") |
| |
| private float mFlingGestureMaxOutputVelocityPx; // how fast can it really go? (should be a little |
| // faster than mSelfCollapseVelocityPx) |
| |
| private float mCollapseBrakingDistancePx = 200; // XXX Resource |
| private float mExpandBrakingDistancePx = 150; // XXX Resource |
| private float mBrakingSpeedPx = 150; // XXX Resource |
| |
| private View mHandleView; |
| private float mPeekHeight; |
| private float mInitialOffsetOnTouch; |
| private float mExpandedFraction = 0; |
| private float mExpandedHeight = 0; |
| private boolean mJustPeeked; |
| private boolean mClosing; |
| private boolean mRubberbanding; |
| private boolean mTracking; |
| private int mTrackingPointer; |
| private int mTouchSlop; |
| |
| private TimeAnimator mTimeAnimator; |
| private ObjectAnimator mPeekAnimator; |
| private FlingTracker mVelocityTracker; |
| |
| /** |
| * A very simple low-pass velocity filter for motion events; not nearly as sophisticated as |
| * VelocityTracker but optimized for the kinds of gestures we expect to see in status bar |
| * panels. |
| */ |
| private static class FlingTracker { |
| static final boolean DEBUG = false; |
| final int MAX_EVENTS = 8; |
| final float DECAY = 0.75f; |
| ArrayDeque<MotionEventCopy> mEventBuf = new ArrayDeque<MotionEventCopy>(MAX_EVENTS); |
| float mVX, mVY = 0; |
| private static class MotionEventCopy { |
| public MotionEventCopy(float x2, float y2, long eventTime) { |
| this.x = x2; |
| this.y = y2; |
| this.t = eventTime; |
| } |
| public float x, y; |
| public long t; |
| } |
| public FlingTracker() { |
| } |
| public void addMovement(MotionEvent event) { |
| if (mEventBuf.size() == MAX_EVENTS) { |
| mEventBuf.remove(); |
| } |
| mEventBuf.add(new MotionEventCopy(event.getX(), event.getY(), event.getEventTime())); |
| } |
| public void computeCurrentVelocity(long timebase) { |
| if (FlingTracker.DEBUG) { |
| Log.v("FlingTracker", "computing velocities for " + mEventBuf.size() + " events"); |
| } |
| mVX = mVY = 0; |
| MotionEventCopy last = null; |
| int i = 0; |
| float totalweight = 0f; |
| float weight = 10f; |
| for (final Iterator<MotionEventCopy> iter = mEventBuf.iterator(); |
| iter.hasNext();) { |
| final MotionEventCopy event = iter.next(); |
| if (last != null) { |
| final float dt = (float) (event.t - last.t) / timebase; |
| final float dx = (event.x - last.x); |
| final float dy = (event.y - last.y); |
| if (FlingTracker.DEBUG) { |
| Log.v("FlingTracker", String.format( |
| " [%d] (t=%d %.1f,%.1f) dx=%.1f dy=%.1f dt=%f vx=%.1f vy=%.1f", |
| i, event.t, event.x, event.y, |
| dx, dy, dt, |
| (dx/dt), |
| (dy/dt) |
| )); |
| } |
| if (event.t == last.t) { |
| // Really not sure what to do with events that happened at the same time, |
| // so we'll skip subsequent events. |
| if (DEBUG_NAN) { |
| Log.v("FlingTracker", "skipping simultaneous event at t=" + event.t); |
| } |
| continue; |
| } |
| mVX += weight * dx / dt; |
| mVY += weight * dy / dt; |
| totalweight += weight; |
| weight *= DECAY; |
| } |
| last = event; |
| i++; |
| } |
| if (totalweight > 0) { |
| mVX /= totalweight; |
| mVY /= totalweight; |
| } else { |
| if (DEBUG_NAN) { |
| Log.v("FlingTracker", "computeCurrentVelocity warning: totalweight=0", |
| new Throwable()); |
| } |
| // so as not to contaminate the velocities with NaN |
| mVX = mVY = 0; |
| } |
| |
| if (FlingTracker.DEBUG) { |
| Log.v("FlingTracker", "computed: vx=" + mVX + " vy=" + mVY); |
| } |
| } |
| public float getXVelocity() { |
| if (Float.isNaN(mVX) || Float.isInfinite(mVX)) { |
| if (DEBUG_NAN) { |
| Log.v("FlingTracker", "warning: vx=" + mVX); |
| } |
| mVX = 0; |
| } |
| return mVX; |
| } |
| public float getYVelocity() { |
| if (Float.isNaN(mVY) || Float.isInfinite(mVX)) { |
| if (DEBUG_NAN) { |
| Log.v("FlingTracker", "warning: vx=" + mVY); |
| } |
| mVY = 0; |
| } |
| return mVY; |
| } |
| public void recycle() { |
| mEventBuf.clear(); |
| } |
| |
| static FlingTracker sTracker; |
| static FlingTracker obtain() { |
| if (sTracker == null) { |
| sTracker = new FlingTracker(); |
| } |
| return sTracker; |
| } |
| } |
| |
| PanelBar mBar; |
| |
| private final TimeListener mAnimationCallback = new TimeListener() { |
| @Override |
| public void onTimeUpdate(TimeAnimator animation, long totalTime, long deltaTime) { |
| animationTick(deltaTime); |
| } |
| }; |
| |
| private final Runnable mStopAnimator = new Runnable() { |
| @Override |
| public void run() { |
| if (mTimeAnimator != null && mTimeAnimator.isStarted()) { |
| mTimeAnimator.end(); |
| mRubberbanding = false; |
| mClosing = false; |
| } |
| } |
| }; |
| |
| private float mVel, mAccel; |
| protected int mMaxPanelHeight = 0; |
| private String mViewName; |
| protected float mInitialTouchY; |
| protected float mFinalTouchY; |
| |
| public void setRubberbandingEnabled(boolean enable) { |
| mRubberbandingEnabled = enable; |
| } |
| |
| private void runPeekAnimation() { |
| if (DEBUG) logf("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 > getMaxPanelHeight() // 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 / getMaxPanelHeight()) < 0.5f; |
| } else { |
| mClosing = mExpandedHeight > 0 && mVel < 0; |
| } |
| } else if (dtms > 0) { |
| final float dt = dtms * 0.001f; // ms -> s |
| if (DEBUG) logf("tick: v=%.2fpx/s dt=%.4fs", mVel, dt); |
| if (DEBUG) logf("tick: before: h=%d", (int) mExpandedHeight); |
| |
| final float fh = getMaxPanelHeight(); |
| 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) logf("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); |
| } |
| } else { |
| Log.v(TAG, "animationTick called with dtms=" + dtms + "; nothing to do (h=" |
| + mExpandedHeight + " v=" + mVel + ")"); |
| } |
| } |
| |
| public PanelView(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| |
| mTimeAnimator = new TimeAnimator(); |
| mTimeAnimator.setTimeListener(mAnimationCallback); |
| } |
| |
| private void loadDimens() { |
| final Resources res = getContext().getResources(); |
| |
| mSelfExpandVelocityPx = res.getDimension(R.dimen.self_expand_velocity); |
| mSelfCollapseVelocityPx = res.getDimension(R.dimen.self_collapse_velocity); |
| mFlingExpandMinVelocityPx = res.getDimension(R.dimen.fling_expand_min_velocity); |
| mFlingCollapseMinVelocityPx = res.getDimension(R.dimen.fling_collapse_min_velocity); |
| |
| mFlingGestureMinDistPx = res.getDimension(R.dimen.fling_gesture_min_dist); |
| |
| mCollapseMinDisplayFraction = res.getFraction(R.dimen.collapse_min_display_fraction, 1, 1); |
| mExpandMinDisplayFraction = res.getFraction(R.dimen.expand_min_display_fraction, 1, 1); |
| |
| mExpandAccelPx = res.getDimension(R.dimen.expand_accel); |
| mCollapseAccelPx = res.getDimension(R.dimen.collapse_accel); |
| |
| mFlingGestureMaxXVelocityPx = res.getDimension(R.dimen.fling_gesture_max_x_velocity); |
| |
| mFlingGestureMaxOutputVelocityPx = res.getDimension(R.dimen.fling_gesture_max_output_velocity); |
| |
| mPeekHeight = res.getDimension(R.dimen.peek_height) |
| + getPaddingBottom() // our window might have a dropshadow |
| - (mHandleView == null ? 0 : mHandleView.getPaddingTop()); // the handle might have a topshadow |
| |
| final ViewConfiguration configuration = ViewConfiguration.get(getContext()); |
| mTouchSlop = configuration.getScaledTouchSlop(); |
| } |
| |
| private void trackMovement(MotionEvent event) { |
| // Add movement to velocity tracker using raw screen X and Y coordinates instead |
| // of window coordinates because the window frame may be moving at the same time. |
| float deltaX = event.getRawX() - event.getX(); |
| float deltaY = event.getRawY() - event.getY(); |
| event.offsetLocation(deltaX, deltaY); |
| if (mVelocityTracker != null) mVelocityTracker.addMovement(event); |
| event.offsetLocation(-deltaX, -deltaY); |
| } |
| |
| @Override |
| public boolean onTouchEvent(MotionEvent event) { |
| |
| /* |
| * We capture touch events here and update the expand height here in case according to |
| * the users fingers. This also handles multi-touch. |
| * |
| * If the user just clicks shortly, we give him a quick peek of the shade. |
| * |
| * Flinging is also enabled in order to open or close the shade. |
| */ |
| |
| int pointerIndex = event.findPointerIndex(mTrackingPointer); |
| if (pointerIndex < 0) { |
| pointerIndex = 0; |
| mTrackingPointer = event.getPointerId(pointerIndex); |
| } |
| final float y = event.getY(pointerIndex); |
| |
| switch (event.getActionMasked()) { |
| case MotionEvent.ACTION_DOWN: |
| mTracking = true; |
| if (mHandleView != null) { |
| mHandleView.setPressed(true); |
| postInvalidate(); // catch the press state change |
| } |
| |
| mInitialTouchY = y; |
| initVelocityTracker(); |
| trackMovement(event); |
| mTimeAnimator.cancel(); // end any outstanding animations |
| mBar.onTrackingStarted(PanelView.this); |
| mInitialOffsetOnTouch = mExpandedHeight; |
| if (mExpandedHeight == 0) { |
| mJustPeeked = true; |
| runPeekAnimation(); |
| } |
| break; |
| |
| case MotionEvent.ACTION_POINTER_UP: |
| final int upPointer = event.getPointerId(event.getActionIndex()); |
| if (mTrackingPointer == upPointer) { |
| // gesture is ongoing, find a new pointer to track |
| final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1; |
| final float newY = event.getY(newIndex); |
| mTrackingPointer = event.getPointerId(newIndex); |
| mInitialOffsetOnTouch = mExpandedHeight; |
| mInitialTouchY = newY; |
| } |
| break; |
| |
| case MotionEvent.ACTION_MOVE: |
| final float h = y - mInitialTouchY + mInitialOffsetOnTouch; |
| if (h > mPeekHeight) { |
| if (mPeekAnimator != null && mPeekAnimator.isStarted()) { |
| mPeekAnimator.cancel(); |
| } |
| mJustPeeked = false; |
| } |
| if (!mJustPeeked) { |
| setExpandedHeightInternal(h); |
| mBar.panelExpansionChanged(PanelView.this, mExpandedFraction); |
| } |
| |
| trackMovement(event); |
| break; |
| |
| case MotionEvent.ACTION_UP: |
| case MotionEvent.ACTION_CANCEL: |
| mFinalTouchY = y; |
| mTracking = false; |
| mTrackingPointer = -1; |
| if (mHandleView != null) { |
| mHandleView.setPressed(false); |
| postInvalidate(); // catch the press state change |
| } |
| mBar.onTrackingStopped(PanelView.this); |
| trackMovement(event); |
| |
| float vel = getCurrentVelocity(); |
| fling(vel, true); |
| |
| if (mVelocityTracker != null) { |
| mVelocityTracker.recycle(); |
| mVelocityTracker = null; |
| } |
| break; |
| } |
| return true; |
| } |
| |
| private float getCurrentVelocity() { |
| float vel = 0; |
| float yVel = 0, xVel = 0; |
| boolean negative = false; |
| |
| // the velocitytracker might be null if we got a bad input stream |
| if (mVelocityTracker == null) { |
| return 0; |
| } |
| |
| mVelocityTracker.computeCurrentVelocity(1000); |
| |
| yVel = mVelocityTracker.getYVelocity(); |
| negative = yVel < 0; |
| |
| xVel = mVelocityTracker.getXVelocity(); |
| if (xVel < 0) { |
| xVel = -xVel; |
| } |
| if (xVel > mFlingGestureMaxXVelocityPx) { |
| xVel = mFlingGestureMaxXVelocityPx; // limit how much we care about the x axis |
| } |
| |
| vel = (float) Math.hypot(yVel, xVel); |
| if (vel > mFlingGestureMaxOutputVelocityPx) { |
| vel = mFlingGestureMaxOutputVelocityPx; |
| } |
| |
| // if you've barely moved your finger, we treat the velocity as 0 |
| // preventing spurious flings due to touch screen jitter |
| final float deltaY = Math.abs(mFinalTouchY - mInitialTouchY); |
| if (deltaY < mFlingGestureMinDistPx |
| || vel < mFlingExpandMinVelocityPx |
| ) { |
| vel = 0; |
| } |
| |
| if (negative) { |
| vel = -vel; |
| } |
| |
| if (DEBUG) { |
| logf("gesture: dy=%f vel=(%f,%f) vlinear=%f", |
| deltaY, |
| xVel, yVel, |
| vel); |
| } |
| return vel; |
| } |
| |
| @Override |
| public boolean onInterceptTouchEvent(MotionEvent event) { |
| |
| /* |
| * If the user drags anywhere inside the panel we intercept it if he moves his finger |
| * upwards. This allows closing the shade from anywhere inside the panel. |
| * |
| * We only do this if the current content is scrolled to the bottom, |
| * i.e isScrolledToBottom() is true and therefore there is no conflicting scrolling gesture |
| * possible. |
| */ |
| int pointerIndex = event.findPointerIndex(mTrackingPointer); |
| if (pointerIndex < 0) { |
| pointerIndex = 0; |
| mTrackingPointer = event.getPointerId(pointerIndex); |
| } |
| final float y = event.getY(pointerIndex); |
| boolean scrolledToBottom = isScrolledToBottom(); |
| |
| switch (event.getActionMasked()) { |
| case MotionEvent.ACTION_DOWN: |
| mTracking = true; |
| if (mHandleView != null) { |
| mHandleView.setPressed(true); |
| // catch the press state change |
| postInvalidate(); |
| } |
| mInitialTouchY = y; |
| initVelocityTracker(); |
| trackMovement(event); |
| mTimeAnimator.cancel(); // end any outstanding animations |
| if (mExpandedHeight == 0 || y > getContentHeight()) { |
| return true; |
| } |
| break; |
| case MotionEvent.ACTION_POINTER_UP: |
| final int upPointer = event.getPointerId(event.getActionIndex()); |
| if (mTrackingPointer == upPointer) { |
| // gesture is ongoing, find a new pointer to track |
| final int newIndex = event.getPointerId(0) != upPointer ? 0 : 1; |
| mTrackingPointer = event.getPointerId(newIndex); |
| final float newY = event.getY(newIndex); |
| mInitialTouchY = newY; |
| } |
| break; |
| |
| case MotionEvent.ACTION_MOVE: |
| final float h = y - mInitialTouchY; |
| trackMovement(event); |
| if (scrolledToBottom) { |
| if (h < -mTouchSlop) { |
| mInitialOffsetOnTouch = mExpandedHeight; |
| mInitialTouchY = y; |
| return true; |
| } |
| } |
| break; |
| } |
| return false; |
| } |
| |
| private void initVelocityTracker() { |
| if (mVelocityTracker != null) { |
| mVelocityTracker.recycle(); |
| } |
| mVelocityTracker = FlingTracker.obtain(); |
| } |
| |
| protected boolean isScrolledToBottom() { |
| return false; |
| } |
| |
| protected float getContentHeight() { |
| return mExpandedHeight; |
| } |
| |
| @Override |
| protected void onFinishInflate() { |
| super.onFinishInflate(); |
| mHandleView = findViewById(R.id.handle); |
| |
| loadDimens(); |
| } |
| |
| public void fling(float vel, boolean always) { |
| if (DEBUG) logf("fling: vel=%.3f, this=%s", vel, this); |
| mVel = vel; |
| |
| if (always||mVel != 0) { |
| animationTick(0); // begin the animation |
| } |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| mViewName = getResources().getResourceName(getId()); |
| } |
| |
| public String getName() { |
| return mViewName; |
| } |
| |
| @Override |
| protected void onViewAdded(View child) { |
| if (DEBUG) logf("onViewAdded: " + child); |
| } |
| |
| public View getHandle() { |
| return mHandleView; |
| } |
| |
| // Rubberbands the panel to hold its contents. |
| @Override |
| protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { |
| super.onMeasure(widthMeasureSpec, heightMeasureSpec); |
| |
| if (DEBUG) logf("onMeasure(%d, %d) -> (%d, %d)", |
| widthMeasureSpec, heightMeasureSpec, getMeasuredWidth(), getMeasuredHeight()); |
| |
| // Did one of our children change size? |
| int newHeight = getMeasuredHeight(); |
| if (newHeight != mMaxPanelHeight) { |
| mMaxPanelHeight = newHeight; |
| } |
| heightMeasureSpec = MeasureSpec.makeMeasureSpec( |
| getDesiredMeasureHeight(), MeasureSpec.AT_MOST); |
| setMeasuredDimension(widthMeasureSpec, heightMeasureSpec); |
| } |
| |
| protected int getDesiredMeasureHeight() { |
| return (int) mExpandedHeight; |
| } |
| |
| |
| public void setExpandedHeight(float height) { |
| if (DEBUG) logf("setExpandedHeight(%.1f)", height); |
| mRubberbanding = false; |
| if (mTimeAnimator.isStarted()) { |
| post(mStopAnimator); |
| } |
| setExpandedHeightInternal(height); |
| mBar.panelExpansionChanged(PanelView.this, mExpandedFraction); |
| } |
| |
| @Override |
| protected void onLayout (boolean changed, int left, int top, int right, int bottom) { |
| if (DEBUG) logf("onLayout: changed=%s, bottom=%d eh=%d fh=%d", changed?"T":"f", bottom, |
| (int)mExpandedHeight, mMaxPanelHeight); |
| super.onLayout(changed, left, top, right, bottom); |
| requestPanelHeightUpdate(); |
| } |
| |
| protected void requestPanelHeightUpdate() { |
| float currentMaxPanelHeight = getMaxPanelHeight(); |
| |
| // If the user isn't actively poking us, let's update the height |
| if (!mTracking && !mRubberbanding && !mTimeAnimator.isStarted() |
| && mExpandedHeight > 0 && currentMaxPanelHeight != mExpandedHeight) { |
| setExpandedHeightInternal(currentMaxPanelHeight); |
| } |
| } |
| |
| public void setExpandedHeightInternal(float h) { |
| if (Float.isNaN(h)) { |
| // If a NaN gets in here, it will freeze the Animators. |
| if (DEBUG_NAN) { |
| Log.v(TAG, "setExpandedHeightInternal: warning: h=NaN, using 0 instead", |
| new Throwable()); |
| } |
| h = 0; |
| } |
| |
| float fh = getMaxPanelHeight(); |
| if (fh == 0) { |
| // Hmm, full height hasn't been computed yet |
| } |
| |
| if (h < 0) h = 0; |
| if (!(mRubberbandingEnabled && (mTracking || mRubberbanding)) && h > fh) h = fh; |
| |
| mExpandedHeight = h; |
| |
| if (DEBUG) { |
| logf("setExpansion: height=%.1f fh=%.1f tracking=%s rubber=%s", h, fh, |
| mTracking ? "T" : "f", mRubberbanding ? "T" : "f"); |
| } |
| |
| onHeightUpdated(mExpandedHeight); |
| |
| // FrameLayout.LayoutParams lp = (FrameLayout.LayoutParams) getLayoutParams(); |
| // lp.height = (int) mExpandedHeight; |
| // setLayoutParams(lp); |
| |
| mExpandedFraction = Math.min(1f, (fh == 0) ? 0 : h / fh); |
| } |
| |
| protected void onHeightUpdated(float expandedHeight) { |
| requestLayout(); |
| } |
| |
| /** |
| * This returns the maximum height of the panel. Children should override this if their |
| * desired height is not the full height. |
| * |
| * @return the default implementation simply returns the maximum height. |
| */ |
| protected int getMaxPanelHeight() { |
| if (mMaxPanelHeight <= 0) { |
| if (DEBUG) logf("Forcing measure() since mMaxPanelHeight=" + mMaxPanelHeight); |
| measure(MeasureSpec.makeMeasureSpec(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, MeasureSpec.EXACTLY), |
| MeasureSpec.makeMeasureSpec(android.view.ViewGroup.LayoutParams.WRAP_CONTENT, MeasureSpec.EXACTLY)); |
| } |
| return mMaxPanelHeight; |
| } |
| |
| public void setExpandedFraction(float frac) { |
| if (Float.isNaN(frac)) { |
| // If a NaN gets in here, it will freeze the Animators. |
| if (DEBUG_NAN) { |
| Log.v(TAG, "setExpandedFraction: frac=NaN, using 0 instead", |
| new Throwable()); |
| } |
| frac = 0; |
| } |
| setExpandedHeight(getMaxPanelHeight() * frac); |
| } |
| |
| public float getExpandedHeight() { |
| return mExpandedHeight; |
| } |
| |
| public float getExpandedFraction() { |
| return mExpandedFraction; |
| } |
| |
| public boolean isFullyExpanded() { |
| return mExpandedHeight >= getMaxPanelHeight(); |
| } |
| |
| public boolean isFullyCollapsed() { |
| return mExpandedHeight <= 0; |
| } |
| |
| public boolean isCollapsing() { |
| return mClosing; |
| } |
| |
| public boolean isTracking() { |
| return mTracking; |
| } |
| |
| public void setBar(PanelBar panelBar) { |
| mBar = panelBar; |
| } |
| |
| public void collapse() { |
| // TODO: abort animation or ongoing touch |
| if (DEBUG) logf("collapse: " + this); |
| if (!isFullyCollapsed()) { |
| mTimeAnimator.cancel(); |
| mClosing = true; |
| // collapse() should never be a rubberband, even if an animation is already running |
| mRubberbanding = false; |
| fling(-mSelfCollapseVelocityPx, /*always=*/ true); |
| } |
| } |
| |
| public void expand() { |
| if (DEBUG) logf("expand: " + this); |
| if (isFullyCollapsed()) { |
| mBar.startOpeningPanel(this); |
| fling(mSelfExpandVelocityPx, /*always=*/ true); |
| } else if (DEBUG) { |
| if (DEBUG) logf("skipping expansion: is expanded"); |
| } |
| } |
| |
| public void cancelPeek() { |
| if (mPeekAnimator != null && mPeekAnimator.isStarted()) { |
| mPeekAnimator.cancel(); |
| } |
| } |
| |
| public void dump(FileDescriptor fd, PrintWriter pw, String[] args) { |
| pw.println(String.format("[PanelView(%s): expandedHeight=%f maxPanelHeight=%f closing=%s" |
| + " tracking=%s rubberbanding=%s justPeeked=%s peekAnim=%s%s timeAnim=%s%s" |
| + "]", |
| this.getClass().getSimpleName(), |
| getExpandedHeight(), |
| getMaxPanelHeight(), |
| mClosing?"T":"f", |
| mTracking?"T":"f", |
| mRubberbanding?"T":"f", |
| mJustPeeked?"T":"f", |
| mPeekAnimator, ((mPeekAnimator!=null && mPeekAnimator.isStarted())?" (started)":""), |
| mTimeAnimator, ((mTimeAnimator!=null && mTimeAnimator.isStarted())?" (started)":"") |
| )); |
| } |
| } |