Example usage for android.view MotionEvent obtain

Introduction

In this page you can find the example usage for android.view MotionEvent obtain.

Prototype

static public MotionEvent obtain(long downTime, long eventTime, int action, float x, float y, int metaState) 

Source Link

Document

Create a new MotionEvent, filling in a subset of the basic motion values.

Usage

From source file:com.bluetoothlamp.tiny.view.verticalview.VerticalViewPager.java

/**
 * Start a fake drag of the pager./*w  w  w .  j  a v a2  s .  c  o m*/
 *
 * <p>A fake drag can be useful if you want to synchronize the motion of the ViewPager
 * with the touch scrolling of another view, while still letting the ViewPager
 * control the snapping motion and fling behavior. (e.g. parallax-scrolling tabs.)
 * Call {@link #fakeDragBy(float)} to simulate the actual drag motion. Call
 * {@link #endFakeDrag()} to complete the fake drag and fling as necessary.
 *
 * <p>During a fake drag the ViewPager will ignore all touch events. If a real drag
 * is already in progress, this method will return false.
 *
 * @return true if the fake drag began successfully, false if it could not be started.
 *
 * @see #fakeDragBy(float)
 * @see #endFakeDrag()
 */
public boolean beginFakeDrag() {
    if (mIsBeingDragged) {
        return false;
    } /* end of if */
    mFakeDragging = true;
    setScrollState(SCROLL_STATE_DRAGGING);
    // XXX ?
    mInitialMotionY = mLastMotionY = 0;
    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    } else {
        mVelocityTracker.clear();
    } /* end of if */
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(time, time, MotionEvent.ACTION_DOWN, 0, 0, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
    mFakeDragBeginTime = time;
    return true;
}

---

From source file:com.example.view.VerticalViewPager.java

/**
 * Start a fake drag of the pager.//from   www  . j ava  2  s.  c  om
 * 
 * <p>
 * A fake drag can be useful if you want to synchronize the motion of the
 * ViewPager with the touch scrolling of another view, while still letting
 * the ViewPager control the snapping motion and fling behavior. (e.g.
 * parallax-scrolling tabs.) Call {@link #fakeDragBy(float)} to simulate the
 * actual drag motion. Call {@link #endFakeDrag()} to complete the fake drag
 * and fling as necessary.
 * 
 * <p>
 * During a fake drag the ViewPager will ignore all touch events. If a real
 * drag is already in progress, this method will return false.
 * 
 * @return true if the fake drag began successfully, false if it could not
 *         be started.
 * 
 * @see #fakeDragBy(float)
 * @see #endFakeDrag()
 */
public boolean beginFakeDrag() {
    if (mIsBeingDragged) {
        return false;
    } /* end of if */
    mFakeDragging = true;
    setScrollState(SCROLL_STATE_DRAGGING);
    // XXX
    mInitialMotionY = mLastMotionY = 0;
    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    } else {
        mVelocityTracker.clear();
    } /* end of if */
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(time, time, MotionEvent.ACTION_DOWN, 0, 0, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
    mFakeDragBeginTime = time;
    return true;
}

---

From source file:interactive.view.pagereader.VerticalViewPager.java

/**
 * Start a fake drag of the pager./* www.  ja v  a 2s . co m*/
 * 
 * <p>
 * A fake drag can be useful if you want to synchronize the motion of the
 * ViewPager with the touch scrolling of another view, while still letting
 * the ViewPager control the snapping motion and fling behavior. (e.g.
 * parallax-scrolling tabs.) Call {@link #fakeDragBy(float)} to simulate the
 * actual drag motion. Call {@link #endFakeDrag()} to complete the fake drag
 * and fling as necessary.
 * 
 * <p>
 * During a fake drag the ViewPager will ignore all touch events. If a real
 * drag is already in progress, this method will return false.
 * 
 * @return true if the fake drag began successfully, false if it could not
 *         be started.
 * 
 * @see #fakeDragBy(float)
 * @see #endFakeDrag()
 */
public boolean beginFakeDrag() {
    if (mIsBeingDragged) {
        return false;
    } /* end of if */
    mFakeDragging = true;
    setScrollState(SCROLL_STATE_DRAGGING);
    // XXX 
    mInitialMotionY = mLastMotionY = 0;
    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    } else {
        mVelocityTracker.clear();
    } /* end of if */
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(time, time, MotionEvent.ACTION_DOWN, 0, 0, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
    mFakeDragBeginTime = time;
    return true;
}

---

From source file:administrator.example.com.myscrollview.VerticalViewPager.java

/**
 * Fake drag by an offset in pixels. You must have called {@link #beginFakeDrag()} first.
 *
 * @param yOffset Offset in pixels to drag by.
 * @see #beginFakeDrag()/*www  . j  a  v a 2 s.  co  m*/
 * @see #endFakeDrag()
 */
public void fakeDragBy(float yOffset) {
    if (!mFakeDragging) {
        throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first.");
    } /* end of if */

    mLastMotionY += yOffset;
    float scrollY = getScrollY() - yOffset;
    final int height = getHeight();
    final int heightWithMargin = height + mPageMargin;

    final float topBound = Math.max(0, (mCurItem - 1) * heightWithMargin);
    final float bottomBound = Math.min(mCurItem + 1, mAdapter.getCount() - 1) * heightWithMargin;
    if (scrollY < topBound) {
        scrollY = topBound;
    } else if (scrollY > bottomBound) {
        scrollY = bottomBound;
    } /* end of if */
    // Don't lose the rounded component
    mLastMotionY += scrollY - (int) scrollY;
    scrollTo(getScrollX(), (int) scrollY);
    pageScrolled((int) scrollY);

    // Synthesize an event for the VelocityTracker.
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE, 0,
            mLastMotionY, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
}

---

From source file:cn.ismartv.recyclerview.widget.RecyclerView.java

/**
 * Enable or disable layout and scroll.  After <code>setLayoutFrozen(true)</code> is called,
 * Layout requests will be postponed until <code>setLayoutFrozen(false)</code> is called;
 * child views are not updated when RecyclerView is frozen, {@link #smoothScrollBy(int, int)},
 * {@link #scrollBy(int, int)}, {@link #scrollToPosition(int)} and
 * {@link #smoothScrollToPosition(int)} are dropped; TouchEvents and GenericMotionEvents are
 * dropped; {@link LayoutManager#onFocusSearchFailed(View, int, Recycler, State)} will not be
 * called.//w  ww.  j a  va 2 s .co m
 *
 * <p>
 * <code>setLayoutFrozen(true)</code> does not prevent app from directly calling {@link
 * LayoutManager#scrollToPosition(int)}, {@link LayoutManager#smoothScrollToPosition(
 * RecyclerView, State, int)}.
 * <p>
 * {@link #setAdapter(Adapter)} and {@link #swapAdapter(Adapter, boolean)} will automatically
 * stop frozen.
 * <p>
 * Note: Running ItemAnimator is not stopped automatically,  it's caller's
 * responsibility to call ItemAnimator.end().
 *
 * @param frozen   true to freeze layout and scroll, false to re-enable.
 */
public void setLayoutFrozen(boolean frozen) {
    if (frozen != mLayoutFrozen) {
        assertNotInLayoutOrScroll("Do not setLayoutFrozen in layout or scroll");
        if (!frozen) {
            mLayoutFrozen = frozen;
            if (mLayoutRequestEaten && mLayout != null && mAdapter != null) {
                requestLayout();
            }
            mLayoutRequestEaten = false;
        } else {
            final long now = SystemClock.uptimeMillis();
            MotionEvent cancelEvent = MotionEvent.obtain(now, now, MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0);
            onTouchEvent(cancelEvent);
            mLayoutFrozen = frozen;
            mIgnoreMotionEventTillDown = true;
            stopScroll();
        }
    }
}

---

From source file:org.bangbang.support.v4.widget.VerticalViewPager.java

/**
 * Start a fake drag of the pager./* w w  w .ja v  a2s . com*/
 *
 * <p>A fake drag can be useful if you want to synchronize the motion of the ViewPager
 * with the touch scrolling of another view, while still letting the ViewPager
 * control the snapping motion and fling behavior. (e.g. parallax-scrolling tabs.)
 * Call {@link #fakeDragBy(float)} to simulate the actual drag motion. Call
 * {@link #endFakeDrag()} to complete the fake drag and fling as necessary.
 *
 * <p>During a fake drag the ViewPager will ignore all touch events. If a real drag
 * is already in progress, this method will return false.
 *
 * @return true if the fake drag began successfully, false if it could not be started.
 *
 * @see #fakeDragBy(float)
 * @see #endFakeDrag()
 */
public boolean beginFakeDrag() {
    if (mIsBeingDragged) {
        return false;
    }
    mFakeDragging = true;
    setScrollState(SCROLL_STATE_DRAGGING);
    // bangbang.S
    //        mInitialMotionX = mLastMotionX = 0;
    mInitialMotionY = mLastMotionY = 0;
    if (mVelocityTracker == null) {
        mVelocityTracker = VelocityTracker.obtain();
    } else {
        mVelocityTracker.clear();
    }
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(time, time, MotionEvent.ACTION_DOWN, 0, 0, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
    mFakeDragBeginTime = time;
    return true;
}

---

From source file:com.gome.ecmall.custom.VerticalViewPager.java

/**
 * Fake drag by an offset in pixels. You must have called {@link #beginFakeDrag()} first.
 * //from  www  . jav a 2s . c o m
 * @param xOffset
 *            Offset in pixels to drag by.
 * @see #beginFakeDrag()
 * @see #endFakeDrag()
 */
public void fakeDragBy(float yOffset) {
    if (!mFakeDragging) {
        throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first.");
    }

    mLastMotionY += yOffset;

    float oldScrollY = getScrollY();
    float scrollY = oldScrollY - yOffset;
    final int height = getHeight();

    float topBound = height * mFirstOffset;
    float bottomBound = height * mLastOffset;

    final ItemInfo firstItem = mItems.get(0);
    final ItemInfo lastItem = mItems.get(mItems.size() - 1);
    if (firstItem.position != 0) {
        topBound = firstItem.offset * height;
    }
    if (lastItem.position != mAdapter.getCount() - 1) {
        bottomBound = lastItem.offset * topBound;
    }

    if (scrollY < topBound) {
        scrollY = topBound;
    } else if (scrollY > bottomBound) {
        scrollY = bottomBound;
    }
    // Don't lose the rounded component
    mLastMotionY += scrollY - (int) scrollY;
    scrollTo(getScrollX(), (int) scrollY);
    pageScrolled((int) scrollY);

    // Synthesize an event for the VelocityTracker.
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE, 0,
            mLastMotionY, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
}

---

From source file:android.support.v71.widget.RecyclerView.java

/**
 * Enable or disable layout and scroll.  After <code>setLayoutFrozen(true)</code> is called,
 * Layout requests will be postponed until <code>setLayoutFrozen(false)</code> is called;
 * child views are not updated when RecyclerView is frozen, {@link #smoothScrollBy(int, int)},
 * {@link #scrollBy(int, int)}, {@link #scrollToPosition(int)} and
 * {@link #smoothScrollToPosition(int)} are dropped; TouchEvents and GenericMotionEvents are
 * dropped; {@link LayoutManager#onFocusSearchFailed(View, int, Recycler, State)} will not be
 * called.//from  w  w  w.  j a  v a2  s.c  o  m
 * <p/>
 * <p/>
 * <code>setLayoutFrozen(true)</code> does not prevent app from directly calling {@link
 * LayoutManager#scrollToPosition(int)}, {@link LayoutManager#smoothScrollToPosition(
 *RecyclerView, State, int)}.
 * <p/>
 * {@link #setAdapter(Adapter)} and {@link #swapAdapter(Adapter, boolean)} will automatically
 * stop frozen.
 * <p/>
 * Note: Running ItemAnimator is not stopped automatically,  it's caller's
 * responsibility to call ItemAnimator.end().
 * <p/>
 * 
 *
 * @param frozen true to freeze layout and scroll, false to re-enable.
 */
public void setLayoutFrozen(boolean frozen) {
    if (frozen != mLayoutFrozen) {
        // view 
        assertNotInLayoutOrScroll("Do not setLayoutFrozen in layout or scroll");
        if (!frozen) {
            // 
            mLayoutFrozen = frozen;

            //TODO mLayoutRequestEaten ???
            if (mLayoutRequestEaten && mLayout != null && mAdapter != null) {
                //  layoutManager adpater ??  ?
                requestLayout();
            }
            mLayoutRequestEaten = false;
        } else {
            // 
            final long now = SystemClock.uptimeMillis();
            //? cancle 
            MotionEvent cancelEvent = MotionEvent.obtain(now, now, MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0);
            onTouchEvent(cancelEvent);
            mLayoutFrozen = frozen;
            // 
            mIgnoreMotionEventTillDown = true;
            // ?
            stopScroll();
        }
    }
}

---

From source file:cn.ismartv.tvrecyclerview.widget.RecyclerView.java

/**
 * Enable or disable layout and scroll.  After <code>setLayoutFrozen(true)</code> is called,
 * Layout requests will be postponed until <code>setLayoutFrozen(false)</code> is called;
 * child views are not updated when RecyclerView is frozen, {@link #smoothScrollBy(int, int)},
 * {@link #scrollBy(int, int)}, {@link #scrollToPosition(int)} and
 * {@link #smoothScrollToPosition(int)} are dropped; TouchEvents and GenericMotionEvents are
 * dropped; {@link LayoutManager#onFocusSearchFailed(View, int, Recycler, State)} will not be
 * called./* www  .  ja v  a  2 s  . c o  m*/
 *
 * <p>
 * <code>setLayoutFrozen(true)</code> does not prevent app from directly calling {@link
 * LayoutManager#scrollToPosition(int)}, {@link LayoutManager#smoothScrollToPosition(
 * RecyclerView, State, int)}.
 * <p>
 * {@link #setAdapter(Adapter)} and {@link #swapAdapter(Adapter, boolean)} will automatically
 * stop frozen.
 * <p>
 * Note: Running ItemAnimator is not stopped automatically,  it's caller's
 * responsibility to call ItemAnimator.end().
 *
 * @param frozen   true to freeze layout and scroll, false to re-enable.
 */
public void setLayoutFrozen(boolean frozen) {
    if (frozen != mLayoutFrozen) {
        assertNotInLayoutOrScroll("Do not setLayoutFrozen in layout or scroll");
        if (!frozen) {
            mLayoutFrozen = false;
            if (mLayoutRequestEaten && mLayout != null && mAdapter != null) {
                requestLayout();
            }
            mLayoutRequestEaten = false;
        } else {
            final long now = SystemClock.uptimeMillis();
            MotionEvent cancelEvent = MotionEvent.obtain(now, now, MotionEvent.ACTION_CANCEL, 0.0f, 0.0f, 0);
            onTouchEvent(cancelEvent);
            mLayoutFrozen = true;
            mIgnoreMotionEventTillDown = true;
            stopScroll();
        }
    }
}

---

From source file:org.bangbang.support.v4.widget.VerticalViewPager.java

/**
 * Fake drag by an offset in pixels. You must have called {@link #beginFakeDrag()} first.
 *
 * @param yOffset Offset in pixels to drag by.
 * @see #beginFakeDrag()//  w  w  w.j a va 2  s .c o  m
 * @see #endFakeDrag()
 */
public void fakeDragBy(float yOffset) {
    if (!mFakeDragging) {
        throw new IllegalStateException("No fake drag in progress. Call beginFakeDrag first.");
    }

    mLastMotionY += yOffset;

    float oldScrollY = getScrollY();
    float scrollY = oldScrollY - yOffset;
    final int height = getHeight();

    float bottomBound = height * mFirstOffset;
    float topBound = height * mLastOffset;

    final ItemInfo firstItem = mItems.get(0);
    final ItemInfo lastItem = mItems.get(mItems.size() - 1);
    if (firstItem.position != 0) {
        bottomBound = firstItem.offset * height;
    }
    if (lastItem.position != mAdapter.getCount() - 1) {
        topBound = lastItem.offset * height;
    }

    if (scrollY < bottomBound) {
        scrollY = bottomBound;
    } else if (scrollY > topBound) {
        scrollY = topBound;
    }
    // Don't lose the rounded component
    // bangbang.S
    //        mLastMotionX += scrollX - (int) scrollX;
    mLastMotionY += scrollY - (int) scrollY;
    scrollTo(getScrollX(), (int) scrollY);
    pageScrolled((int) scrollY);

    // Synthesize an event for the VelocityTracker.
    final long time = SystemClock.uptimeMillis();
    final MotionEvent ev = MotionEvent.obtain(mFakeDragBeginTime, time, MotionEvent.ACTION_MOVE, 0,
            mLastMotionY, 0);
    mVelocityTracker.addMovement(ev);
    ev.recycle();
}

---

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