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/* * Copyright (C) 2008 The Android Open Source Project *//from w w w . j a v a 2 s. c om * 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. * * Modifications by: Alessandro Crugnola */ package valkyrie.widget; import valkyrie.main.R; import android.content.Context; import android.content.res.TypedArray; import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Rect; import android.os.Handler; import android.os.Message; import android.os.SystemClock; import android.util.AttributeSet; import android.util.Log; import android.view.MotionEvent; import android.view.SoundEffectConstants; import android.view.VelocityTracker; import android.view.View; import android.view.ViewGroup; import android.view.accessibility.AccessibilityEvent; public class MultiDirectionSlidingDrawer extends ViewGroup { public static final int ORIENTATION_RTL = 0; public static final int ORIENTATION_BTT = 1; public static final int ORIENTATION_LTR = 2; public static final int ORIENTATION_TTB = 3; private static final int TAP_THRESHOLD = 6; private static final float MAXIMUM_TAP_VELOCITY = 100.0f; private static final float MAXIMUM_MINOR_VELOCITY = 150.0f; private static final float MAXIMUM_MAJOR_VELOCITY = 200.0f; private static final float MAXIMUM_ACCELERATION = 2000.0f; private static final int VELOCITY_UNITS = 1000; private static final int MSG_ANIMATE = 1000; private static final int ANIMATION_FRAME_DURATION = 1000 / 60; private static final int EXPANDED_FULL_OPEN = -10001; private static final int COLLAPSED_FULL_CLOSED = -10002; private final int mHandleId; private final int mContentId; private View mHandle; private View mContent; private final Rect mFrame = new Rect(); private final Rect mInvalidate = new Rect(); private boolean mTracking; private boolean mLocked; private VelocityTracker mVelocityTracker; private boolean mInvert; private boolean mVertical; private boolean mExpanded; private int mBottomOffset; private int mTopOffset; private int mHandleHeight; private int mHandleWidth; private OnDrawerOpenListener mOnDrawerOpenListener; private OnDrawerCloseListener mOnDrawerCloseListener; private OnDrawerScrollListener mOnDrawerScrollListener; private final Handler mHandler = new SlidingHandler(); private float mAnimatedAcceleration; private float mAnimatedVelocity; private float mAnimationPosition; private long mAnimationLastTime; private long mCurrentAnimationTime; private int mTouchDelta; private boolean mAnimating; private boolean mAllowSingleTap; private boolean mAnimateOnClick; private final int mTapThreshold; private final int mMaximumTapVelocity; private int mMaximumMinorVelocity; private int mMaximumMajorVelocity; private int mMaximumAcceleration; private final int mVelocityUnits; /** * Callback invoked when the drawer is opened. */ public static interface OnDrawerOpenListener { /** * Invoked when the drawer becomes fully open. */ public void onDrawerOpened(); } /** * Callback invoked when the drawer is closed. */ public static interface OnDrawerCloseListener { /** * Invoked when the drawer becomes fully closed. */ public void onDrawerClosed(); } /** * Callback invoked when the drawer is scrolled. */ public static interface OnDrawerScrollListener { /** * Invoked when the user starts dragging/flinging the drawer's handle. */ public void onScrollStarted(); /** * Invoked when the user stops dragging/flinging the drawer's handle. */ public void onScrollEnded(); } /** * Creates a new SlidingDrawer from a specified set of attributes defined in * XML. * * @param context * The application's environment. * @param attrs * The attributes defined in XML. */ public MultiDirectionSlidingDrawer(Context context, AttributeSet attrs) { this(context, attrs, 0); } /** * Creates a new SlidingDrawer from a specified set of attributes defined in * XML. * * @param context * The application's environment. * @param attrs * The attributes defined in XML. * @param defStyle * The style to apply to this widget. */ public MultiDirectionSlidingDrawer(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.MultiDirectionSlidingDrawer, defStyle, 0); int orientation = a.getInt(R.styleable.MultiDirectionSlidingDrawer_direction, ORIENTATION_BTT); mVertical = (orientation == ORIENTATION_BTT || orientation == ORIENTATION_TTB); mBottomOffset = (int) a.getDimension(R.styleable.MultiDirectionSlidingDrawer_bottomOffset, 0.0f); mTopOffset = (int) a.getDimension(R.styleable.MultiDirectionSlidingDrawer_topOffset, 0.0f); mAllowSingleTap = a.getBoolean(R.styleable.MultiDirectionSlidingDrawer_allowSingleTap, true); mAnimateOnClick = a.getBoolean(R.styleable.MultiDirectionSlidingDrawer_animateOnClick, true); mInvert = (orientation == ORIENTATION_TTB || orientation == ORIENTATION_LTR); int handleId = a.getResourceId(R.styleable.MultiDirectionSlidingDrawer_handle, 0); if (handleId == 0) { throw new IllegalArgumentException("The handle attribute is required and must refer " + "to a valid child."); } int contentId = a.getResourceId(R.styleable.MultiDirectionSlidingDrawer_content, 0); if (contentId == 0) { throw new IllegalArgumentException("The content attribute is required and must refer " + "to a valid child."); } if (handleId == contentId) { throw new IllegalArgumentException("The content and handle attributes must refer " + "to different children."); } mHandleId = handleId; mContentId = contentId; final float density = getResources().getDisplayMetrics().density; mTapThreshold = (int) (TAP_THRESHOLD * density + 0.5f); mMaximumTapVelocity = (int) (MAXIMUM_TAP_VELOCITY * density + 0.5f); mMaximumMinorVelocity = (int) (MAXIMUM_MINOR_VELOCITY * density + 0.5f); mMaximumMajorVelocity = (int) (MAXIMUM_MAJOR_VELOCITY * density + 0.5f); mMaximumAcceleration = (int) (MAXIMUM_ACCELERATION * density + 0.5f); mVelocityUnits = (int) (VELOCITY_UNITS * density + 0.5f); if (mInvert) { mMaximumAcceleration = -mMaximumAcceleration; mMaximumMajorVelocity = -mMaximumMajorVelocity; mMaximumMinorVelocity = -mMaximumMinorVelocity; } a.recycle(); setAlwaysDrawnWithCacheEnabled(false); } @Override protected void onFinishInflate() { mHandle = findViewById(mHandleId); if (mHandle == null) { throw new IllegalArgumentException("The handle attribute is must refer to an" + " existing child."); } mHandle.setOnClickListener(new DrawerToggler()); mContent = findViewById(mContentId); if (mContent == null) { throw new IllegalArgumentException("The content attribute is must refer to an" + " existing child."); } mContent.setVisibility(View.GONE); } @Override protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { int widthSpecMode = MeasureSpec.getMode(widthMeasureSpec); int widthSpecSize = MeasureSpec.getSize(widthMeasureSpec); int heightSpecMode = MeasureSpec.getMode(heightMeasureSpec); int heightSpecSize = MeasureSpec.getSize(heightMeasureSpec); if (widthSpecMode == MeasureSpec.UNSPECIFIED || heightSpecMode == MeasureSpec.UNSPECIFIED) { throw new RuntimeException("SlidingDrawer cannot have UNSPECIFIED dimensions"); } final View handle = mHandle; measureChild(handle, widthMeasureSpec, heightMeasureSpec); if (mVertical) { int height = heightSpecSize - handle.getMeasuredHeight() - mTopOffset; mContent.measure(MeasureSpec.makeMeasureSpec(widthSpecSize, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)); } else { int width = widthSpecSize - handle.getMeasuredWidth() - mTopOffset; mContent.measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(heightSpecSize, MeasureSpec.EXACTLY)); } setMeasuredDimension(widthSpecSize, heightSpecSize); } @Override protected void dispatchDraw(Canvas canvas) { final long drawingTime = getDrawingTime(); final View handle = mHandle; final boolean isVertical = mVertical; drawChild(canvas, handle, drawingTime); if (mTracking || mAnimating) { final Bitmap cache = mContent.getDrawingCache(); if (cache != null) { if (isVertical) { if (mInvert) { canvas.drawBitmap(cache, 0, handle.getTop() - (getBottom() - getTop()) + mHandleHeight, null); } else { canvas.drawBitmap(cache, 0, handle.getBottom(), null); } } else { canvas.drawBitmap(cache, mInvert ? handle.getLeft() - cache.getWidth() : handle.getRight(), 0, null); } } else { canvas.save(); if (mInvert) { canvas.translate(isVertical ? 0 : handle.getLeft() - mTopOffset - mContent.getMeasuredWidth(), isVertical ? handle.getTop() - mTopOffset - mContent.getMeasuredHeight() : 0); } else { canvas.translate(isVertical ? 0 : handle.getLeft() - mTopOffset, isVertical ? handle.getTop() - mTopOffset : 0); } drawChild(canvas, mContent, drawingTime); canvas.restore(); } invalidate(); } else if (mExpanded) { drawChild(canvas, mContent, drawingTime); } } public static final String LOG_TAG = "Sliding"; @Override protected void onLayout(boolean changed, int l, int t, int r, int b) { if (mTracking) { return; } final int width = r - l; final int height = b - t; final View handle = mHandle; int handleWidth = handle.getMeasuredWidth(); int handleHeight = handle.getMeasuredHeight(); Log.d(LOG_TAG, "handleHeight: " + handleHeight); int handleLeft; int handleTop; final View content = mContent; if (mVertical) { handleLeft = (width - handleWidth) / 2; if (mInvert) { Log.d(LOG_TAG, "content.layout(1)"); handleTop = mExpanded ? height - mBottomOffset - handleHeight : mTopOffset; content.layout(0, mTopOffset, content.getMeasuredWidth(), mTopOffset + content.getMeasuredHeight()); } else { handleTop = mExpanded ? mTopOffset : height - handleHeight + mBottomOffset; content.layout(0, mTopOffset + handleHeight, content.getMeasuredWidth(), mTopOffset + handleHeight + content.getMeasuredHeight()); } } else { handleTop = (height - handleHeight) / 2; if (mInvert) { handleLeft = mExpanded ? width - mBottomOffset - handleWidth : mTopOffset; content.layout(mTopOffset, 0, mTopOffset + content.getMeasuredWidth(), content.getMeasuredHeight()); } else { handleLeft = mExpanded ? mTopOffset : width - handleWidth + mBottomOffset; content.layout(mTopOffset + handleWidth, 0, mTopOffset + handleWidth + content.getMeasuredWidth(), content.getMeasuredHeight()); } } handle.layout(handleLeft, handleTop, handleLeft + handleWidth, handleTop + handleHeight); mHandleHeight = handle.getHeight(); mHandleWidth = handle.getWidth(); } @Override public boolean onInterceptTouchEvent(MotionEvent event) { if (mLocked) { return false; } final int action = event.getAction(); float x = event.getX(); float y = event.getY(); final Rect frame = mFrame; final View handle = mHandle; handle.getHitRect(frame); if (!mTracking && !frame.contains((int) x, (int) y)) { return false; } if (action == MotionEvent.ACTION_DOWN) { mTracking = true; handle.setPressed(true); // Must be called before prepareTracking() prepareContent(); // Must be called after prepareContent() if (mOnDrawerScrollListener != null) { mOnDrawerScrollListener.onScrollStarted(); } if (mVertical) { final int top = mHandle.getTop(); mTouchDelta = (int) y - top; prepareTracking(top); } else { final int left = mHandle.getLeft(); mTouchDelta = (int) x - left; prepareTracking(left); } mVelocityTracker.addMovement(event); } return true; } @Override public boolean onTouchEvent(MotionEvent event) { if (mLocked) { return true; } if (mTracking) { mVelocityTracker.addMovement(event); final int action = event.getAction(); switch (action) { case MotionEvent.ACTION_MOVE: moveHandle((int) (mVertical ? event.getY() : event.getX()) - mTouchDelta); break; case MotionEvent.ACTION_UP: case MotionEvent.ACTION_CANCEL: { final VelocityTracker velocityTracker = mVelocityTracker; velocityTracker.computeCurrentVelocity(mVelocityUnits); float yVelocity = velocityTracker.getYVelocity(); float xVelocity = velocityTracker.getXVelocity(); boolean negative; final boolean vertical = mVertical; if (vertical) { negative = yVelocity < 0; if (xVelocity < 0) { xVelocity = -xVelocity; } if ((!mInvert && xVelocity > mMaximumMinorVelocity) || (mInvert && xVelocity < mMaximumMinorVelocity)) { xVelocity = mMaximumMinorVelocity; } } else { negative = xVelocity < 0; if (yVelocity < 0) { yVelocity = -yVelocity; } // fix by Maciej Ciemi?ga. if ((!mInvert && yVelocity > mMaximumMinorVelocity) || (mInvert && yVelocity < mMaximumMinorVelocity)) { yVelocity = mMaximumMinorVelocity; } } float velocity = (float) Math.hypot(xVelocity, yVelocity); if (negative) { velocity = -velocity; } final int handleTop = mHandle.getTop(); final int handleLeft = mHandle.getLeft(); final int handleBottom = mHandle.getBottom(); final int handleRight = mHandle.getRight(); if (Math.abs(velocity) < mMaximumTapVelocity) { boolean c1; boolean c2; boolean c3; boolean c4; if (mInvert) { c1 = (mExpanded && (getBottom() - handleBottom) < mTapThreshold + mBottomOffset); c2 = (!mExpanded && handleTop < mTopOffset + mHandleHeight - mTapThreshold); c3 = (mExpanded && (getRight() - handleRight) < mTapThreshold + mBottomOffset); c4 = (!mExpanded && handleLeft > mTopOffset + mHandleWidth + mTapThreshold); } else { c1 = (mExpanded && handleTop < mTapThreshold + mTopOffset); c2 = (!mExpanded && handleTop > mBottomOffset + getBottom() - getTop() - mHandleHeight - mTapThreshold); c3 = (mExpanded && handleLeft < mTapThreshold + mTopOffset); c4 = (!mExpanded && handleLeft > mBottomOffset + getRight() - getLeft() - mHandleWidth - mTapThreshold); } Log.d(LOG_TAG, "ACTION_UP: " + "c1: " + c1 + ", c2: " + c2 + ", c3: " + c3 + ", c4: " + c4); if (vertical ? c1 || c2 : c3 || c4) { if (mAllowSingleTap) { playSoundEffect(SoundEffectConstants.CLICK); if (mExpanded) { animateClose(vertical ? handleTop : handleLeft); } else { animateOpen(vertical ? handleTop : handleLeft); } } else { performFling(vertical ? handleTop : handleLeft, velocity, false); } } else { performFling(vertical ? handleTop : handleLeft, velocity, false); } } else { performFling(vertical ? handleTop : handleLeft, velocity, false); } } break; } } return mTracking || mAnimating || super.onTouchEvent(event); } private void animateClose(int position) { prepareTracking(position); performFling(position, mMaximumAcceleration, true); } private void animateOpen(int position) { prepareTracking(position); performFling(position, -mMaximumAcceleration, true); } private void performFling(int position, float velocity, boolean always) { mAnimationPosition = position; mAnimatedVelocity = velocity; boolean c1; boolean c2; boolean c3; if (mExpanded) { int bottom = mVertical ? getBottom() : getRight(); int handleHeight = mVertical ? mHandleHeight : mHandleWidth; Log.d(LOG_TAG, "position: " + position + ", velocity: " + velocity + ", mMaximumMajorVelocity: " + mMaximumMajorVelocity); c1 = mInvert ? velocity < mMaximumMajorVelocity : velocity > mMaximumMajorVelocity; c2 = mInvert ? (bottom - (position + handleHeight)) + mBottomOffset > handleHeight : position > mTopOffset + (mVertical ? mHandleHeight : mHandleWidth); c3 = mInvert ? velocity < -mMaximumMajorVelocity : velocity > -mMaximumMajorVelocity; Log.d(LOG_TAG, "EXPANDED. c1: " + c1 + ", c2: " + c2 + ", c3: " + c3); if (always || (c1 || (c2 && c3))) { // We are expanded, So animate to CLOSE! mAnimatedAcceleration = mMaximumAcceleration; if (mInvert) { if (velocity > 0) { mAnimatedVelocity = 0; } } else { if (velocity < 0) { mAnimatedVelocity = 0; } } } else { // We are expanded, but they didn't move sufficiently to cause // us to retract. Animate back to the expanded position. so animate BACK to expanded! mAnimatedAcceleration = -mMaximumAcceleration; if (mInvert) { if (velocity < 0) { mAnimatedVelocity = 0; } } else { if (velocity > 0) { mAnimatedVelocity = 0; } } } } else { // WE'RE COLLAPSED c1 = mInvert ? velocity < mMaximumMajorVelocity : velocity > mMaximumMajorVelocity; c2 = mInvert ? (position < (mVertical ? getHeight() : getWidth()) / 2) : (position > (mVertical ? getHeight() : getWidth()) / 2); c3 = mInvert ? velocity < -mMaximumMajorVelocity : velocity > -mMaximumMajorVelocity; Log.d(LOG_TAG, "COLLAPSED. position: " + position + ", velocity: " + velocity + ", mMaximumMajorVelocity: " + mMaximumMajorVelocity); Log.d(LOG_TAG, "COLLAPSED. always: " + always + ", c1: " + c1 + ", c2: " + c2 + ", c3: " + c3); if (!always && (c1 || (c2 && c3))) { mAnimatedAcceleration = mMaximumAcceleration; if (mInvert) { if (velocity > 0) { mAnimatedVelocity = 0; } } else { if (velocity < 0) { mAnimatedVelocity = 0; } } } else { mAnimatedAcceleration = -mMaximumAcceleration; if (mInvert) { if (velocity < 0) { mAnimatedVelocity = 0; } } else { if (velocity > 0) { mAnimatedVelocity = 0; } } } } long now = SystemClock.uptimeMillis(); mAnimationLastTime = now; mCurrentAnimationTime = now + ANIMATION_FRAME_DURATION; mAnimating = true; mHandler.removeMessages(MSG_ANIMATE); mHandler.sendMessageAtTime(mHandler.obtainMessage(MSG_ANIMATE), mCurrentAnimationTime); stopTracking(); } private void prepareTracking(int position) { mTracking = true; mVelocityTracker = VelocityTracker.obtain(); boolean opening = !mExpanded; if (opening) { mAnimatedAcceleration = mMaximumAcceleration; mAnimatedVelocity = mMaximumMajorVelocity; if (mInvert) mAnimationPosition = mTopOffset; else mAnimationPosition = mBottomOffset + (mVertical ? getHeight() - mHandleHeight : getWidth() - mHandleWidth); moveHandle((int) mAnimationPosition); mAnimating = true; mHandler.removeMessages(MSG_ANIMATE); long now = SystemClock.uptimeMillis(); mAnimationLastTime = now; mCurrentAnimationTime = now + ANIMATION_FRAME_DURATION; mAnimating = true; } else { if (mAnimating) { mAnimating = false; mHandler.removeMessages(MSG_ANIMATE); } moveHandle(position); } } private void moveHandle(int position) { final View handle = mHandle; if (mVertical) { if (position == EXPANDED_FULL_OPEN) { if (mInvert) handle.offsetTopAndBottom(mBottomOffset + getBottom() - getTop() - mHandleHeight); else handle.offsetTopAndBottom(mTopOffset - handle.getTop()); invalidate(); } else if (position == COLLAPSED_FULL_CLOSED) { if (mInvert) { handle.offsetTopAndBottom(mTopOffset - handle.getTop()); } else { handle.offsetTopAndBottom(mBottomOffset + getBottom() - getTop() - mHandleHeight - handle.getTop()); } invalidate(); } else { final int top = handle.getTop(); int deltaY = position - top; if (position < mTopOffset) { deltaY = mTopOffset - top; } else if (deltaY > mBottomOffset + getBottom() - getTop() - mHandleHeight - top) { deltaY = mBottomOffset + getBottom() - getTop() - mHandleHeight - top; } handle.offsetTopAndBottom(deltaY); final Rect frame = mFrame; final Rect region = mInvalidate; handle.getHitRect(frame); region.set(frame); region.union(frame.left, frame.top - deltaY, frame.right, frame.bottom - deltaY); region.union(0, frame.bottom - deltaY, getWidth(), frame.bottom - deltaY + mContent.getHeight()); invalidate(region); } } else { if (position == EXPANDED_FULL_OPEN) { if (mInvert) handle.offsetLeftAndRight(mBottomOffset + getRight() - getLeft() - mHandleWidth); else handle.offsetLeftAndRight(mTopOffset - handle.getLeft()); invalidate(); } else if (position == COLLAPSED_FULL_CLOSED) { if (mInvert) handle.offsetLeftAndRight(mTopOffset - handle.getLeft()); else handle.offsetLeftAndRight(mBottomOffset + getRight() - getLeft() - mHandleWidth - handle.getLeft()); invalidate(); } else { final int left = handle.getLeft(); int deltaX = position - left; if (position < mTopOffset) { deltaX = mTopOffset - left; } else if (deltaX > mBottomOffset + getRight() - getLeft() - mHandleWidth - left) { deltaX = mBottomOffset + getRight() - getLeft() - mHandleWidth - left; } handle.offsetLeftAndRight(deltaX); final Rect frame = mFrame; final Rect region = mInvalidate; handle.getHitRect(frame); region.set(frame); region.union(frame.left - deltaX, frame.top, frame.right - deltaX, frame.bottom); region.union(frame.right - deltaX, 0, frame.right - deltaX + mContent.getWidth(), getHeight()); invalidate(region); } } } private void prepareContent() { if (mAnimating) { return; } // Something changed in the content, we need to honor the layout request // before creating the cached bitmap final View content = mContent; if (content.isLayoutRequested()) { if (mVertical) { final int handleHeight = mHandleHeight; int height = getBottom() - getTop() - handleHeight - mTopOffset; content.measure(MeasureSpec.makeMeasureSpec(getRight() - getLeft(), MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(height, MeasureSpec.EXACTLY)); Log.d(LOG_TAG, "content.layout(2)"); if (mInvert) content.layout(0, mTopOffset, content.getMeasuredWidth(), mTopOffset + content.getMeasuredHeight()); else content.layout(0, mTopOffset + handleHeight, content.getMeasuredWidth(), mTopOffset + handleHeight + content.getMeasuredHeight()); } else { final int handleWidth = mHandle.getWidth(); int width = getRight() - getLeft() - handleWidth - mTopOffset; content.measure(MeasureSpec.makeMeasureSpec(width, MeasureSpec.EXACTLY), MeasureSpec.makeMeasureSpec(getBottom() - getTop(), MeasureSpec.EXACTLY)); if (mInvert) content.layout(mTopOffset, 0, mTopOffset + content.getMeasuredWidth(), content.getMeasuredHeight()); else content.layout(handleWidth + mTopOffset, 0, mTopOffset + handleWidth + content.getMeasuredWidth(), content.getMeasuredHeight()); } } // Try only once... we should really loop but it's not a big deal // if the draw was cancelled, it will only be temporary anyway content.getViewTreeObserver().dispatchOnPreDraw(); content.buildDrawingCache(); content.setVisibility(View.GONE); } private void stopTracking() { mHandle.setPressed(false); mTracking = false; if (mOnDrawerScrollListener != null) { mOnDrawerScrollListener.onScrollEnded(); } if (mVelocityTracker != null) { mVelocityTracker.recycle(); mVelocityTracker = null; } } private void doAnimation() { if (mAnimating) { incrementAnimation(); if (mInvert) { if (mAnimationPosition < mTopOffset) { mAnimating = false; closeDrawer(); } else if (mAnimationPosition >= mTopOffset + (mVertical ? getHeight() : getWidth()) - 1) { mAnimating = false; openDrawer(); } else { moveHandle((int) mAnimationPosition); mCurrentAnimationTime += ANIMATION_FRAME_DURATION; mHandler.sendMessageAtTime(mHandler.obtainMessage(MSG_ANIMATE), mCurrentAnimationTime); } } else { if (mAnimationPosition >= mBottomOffset + (mVertical ? getHeight() : getWidth()) - 1) { mAnimating = false; closeDrawer(); } else if (mAnimationPosition < mTopOffset) { mAnimating = false; openDrawer(); } else { moveHandle((int) mAnimationPosition); mCurrentAnimationTime += ANIMATION_FRAME_DURATION; mHandler.sendMessageAtTime(mHandler.obtainMessage(MSG_ANIMATE), mCurrentAnimationTime); } } } } private void incrementAnimation() { long now = SystemClock.uptimeMillis(); float t = (now - mAnimationLastTime) / 1000.0f; // ms -> s final float position = mAnimationPosition; final float v = mAnimatedVelocity; // px/s final float a = mInvert ? mAnimatedAcceleration : mAnimatedAcceleration; // px/s/s mAnimationPosition = position + (v * t) + (0.5f * a * t * t); // px mAnimatedVelocity = v + (a * t); // px/s mAnimationLastTime = now; // ms } /** * Toggles the drawer open and close. Takes effect immediately. * * @see #open() * @see #close() * @see #animateClose() * @see #animateOpen() * @see #animateToggle() */ public void toggle() { if (!mExpanded) { openDrawer(); } else { closeDrawer(); } invalidate(); requestLayout(); } /** * Toggles the drawer open and close with an animation. * * @see #open() * @see #close() * @see #animateClose() * @see #animateOpen() * @see #toggle() */ public void animateToggle() { if (!mExpanded) { animateOpen(); } else { animateClose(); } } /** * Opens the drawer immediately. * * @see #toggle() * @see #close() * @see #animateOpen() */ public void open() { openDrawer(); invalidate(); requestLayout(); sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); } /** * Closes the drawer immediately. * * @see #toggle() * @see #open() * @see #animateClose() */ public void close() { closeDrawer(); invalidate(); requestLayout(); } /** * Closes the drawer with an animation. * * @see #close() * @see #open() * @see #animateOpen() * @see #animateToggle() * @see #toggle() */ public void animateClose() { prepareContent(); final OnDrawerScrollListener scrollListener = mOnDrawerScrollListener; if (scrollListener != null) { scrollListener.onScrollStarted(); } animateClose(mVertical ? mHandle.getTop() : mHandle.getLeft()); if (scrollListener != null) { scrollListener.onScrollEnded(); } } /** * Opens the drawer with an animation. * * @see #close() * @see #open() * @see #animateClose() * @see #animateToggle() * @see #toggle() */ public void animateOpen() { prepareContent(); final OnDrawerScrollListener scrollListener = mOnDrawerScrollListener; if (scrollListener != null) { scrollListener.onScrollStarted(); } animateOpen(mVertical ? mHandle.getTop() : mHandle.getLeft()); sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED); if (scrollListener != null) { scrollListener.onScrollEnded(); } } private void closeDrawer() { moveHandle(COLLAPSED_FULL_CLOSED); mContent.setVisibility(View.GONE); mContent.destroyDrawingCache(); if (!mExpanded) { return; } mExpanded = false; if (mOnDrawerCloseListener != null) { mOnDrawerCloseListener.onDrawerClosed(); } } private void openDrawer() { moveHandle(EXPANDED_FULL_OPEN); mContent.setVisibility(View.VISIBLE); if (mExpanded) { return; } mExpanded = true; if (mOnDrawerOpenListener != null) { mOnDrawerOpenListener.onDrawerOpened(); } } /** * Sets the listener that receives a notification when the drawer becomes * open. * * @param onDrawerOpenListener * The listener to be notified when the drawer is opened. */ public void setOnDrawerOpenListener(OnDrawerOpenListener onDrawerOpenListener) { mOnDrawerOpenListener = onDrawerOpenListener; } /** * Sets the listener that receives a notification when the drawer becomes * close. * * @param onDrawerCloseListener * The listener to be notified when the drawer is closed. */ public void setOnDrawerCloseListener(OnDrawerCloseListener onDrawerCloseListener) { mOnDrawerCloseListener = onDrawerCloseListener; } /** * Sets the listener that receives a notification when the drawer starts or * ends a scroll. A fling is considered as a scroll. A fling will also * trigger a drawer opened or drawer closed event. * * @param onDrawerScrollListener * The listener to be notified when scrolling starts or stops. */ public void setOnDrawerScrollListener(OnDrawerScrollListener onDrawerScrollListener) { mOnDrawerScrollListener = onDrawerScrollListener; } /** * Returns the handle of the drawer. * * @return The View reprenseting the handle of the drawer, identified by the * "handle" id in XML. */ public View getHandle() { return mHandle; } /** * Returns the content of the drawer. * * @return The View reprenseting the content of the drawer, identified by the * "content" id in XML. */ public View getContent() { return mContent; } /** * Unlocks the SlidingDrawer so that touch events are processed. * * @see #lock() */ public void unlock() { mLocked = false; } /** * Locks the SlidingDrawer so that touch events are ignores. * * @see #unlock() */ public void lock() { mLocked = true; } /** * Indicates whether the drawer is currently fully opened. * * @return True if the drawer is opened, false otherwise. */ public boolean isOpened() { return mExpanded; } /** * Indicates whether the drawer is scrolling or flinging. * * @return True if the drawer is scroller or flinging, false otherwise. */ public boolean isMoving() { return mTracking || mAnimating; } private class DrawerToggler implements OnClickListener { public void onClick(View v) { if (mLocked) { return; } // mAllowSingleTap isn't relevant here; you're *always* // allowed to open/close the drawer by clicking with the // trackball. if (mAnimateOnClick) { animateToggle(); } else { toggle(); } } } private class SlidingHandler extends Handler { public void handleMessage(Message m) { switch (m.what) { case MSG_ANIMATE: doAnimation(); break; } } } }