Example usage for android.widget OverScroller OverScroller

Introduction

In this page you can find the example usage for android.widget OverScroller OverScroller.

Prototype

public OverScroller(Context context) 

Source Link

Document

Creates an OverScroller with a viscous fluid scroll interpolator and flywheel.

Usage

From source file:com.commonsware.cwac.crossport.design.widget.HeaderBehavior.java

final boolean fling(CoordinatorLayout coordinatorLayout, V layout, int minOffset, int maxOffset,
        float velocityY) {
    if (mFlingRunnable != null) {
        layout.removeCallbacks(mFlingRunnable);
        mFlingRunnable = null;/*from   w  w  w .  j av  a 2s  . c  o m*/
    }

    if (mScroller == null) {
        mScroller = new OverScroller(layout.getContext());
    }

    mScroller.fling(0, getTopAndBottomOffset(), // curr
            0, Math.round(velocityY), // velocity.
            0, 0, // x
            minOffset, maxOffset); // y

    if (mScroller.computeScrollOffset()) {
        mFlingRunnable = new FlingRunnable(coordinatorLayout, layout);
        ViewCompat.postOnAnimation(layout, mFlingRunnable);
        return true;
    } else {
        onFlingFinished(coordinatorLayout, layout);
        return false;
    }
}

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From source file:com.comcast.freeflow.core.FreeFlowContainer.java

@Override
protected void init(Context context) {
    // usedViews = new HashMap<Object, FreeFlowItem>();
    // usedHeaderViews = new HashMap<Object, FreeFlowItem>();

    setWillNotDraw(false);//from   w ww .java 2s.  c  o  m

    viewpool = new ViewPool();
    frames = new HashMap<Object, FreeFlowItem>();

    ViewConfiguration configuration = ViewConfiguration.get(context);
    maxFlingVelocity = configuration.getScaledMaximumFlingVelocity();
    minFlingVelocity = configuration.getScaledMinimumFlingVelocity();
    overflingDistance = configuration.getScaledOverflingDistance();
    overscrollDistance = configuration.getScaledOverscrollDistance();

    touchSlop = configuration.getScaledTouchSlop();

    scroller = new OverScroller(context);
    mLeftEdge = new EdgeEffect(context);
    mRightEdge = new EdgeEffect(context);
    mTopEdge = new EdgeEffect(context);
    mBottomEdge = new EdgeEffect(context);

}

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From source file:com.marshalchen.common.uimodule.freeflow.core.FreeFlowContainer.java

@Override
protected void init(Context context) {

    viewpool = new ViewPool();
    frames = new LinkedHashMap<Object, FreeFlowItem>();

    ViewConfiguration configuration = ViewConfiguration.get(context);
    maxFlingVelocity = configuration.getScaledMaximumFlingVelocity();
    minFlingVelocity = configuration.getScaledMinimumFlingVelocity();
    overflingDistance = configuration.getScaledOverflingDistance();
    /*overscrollDistance = configuration.getScaledOverscrollDistance();*/

    touchSlop = configuration.getScaledTouchSlop();

    scroller = new OverScroller(context);

    setEdgeEffectsEnabled(true);// w  ww  .j a va 2s  .co  m

}

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From source file:com.xuejian.client.lxp.common.widget.freeflow.core.FreeFlowContainer.java

@Override
protected void init(Context context) {

    viewpool = new ViewPool();
    frames = new LinkedHashMap<Object, FreeFlowItem>();

    ViewConfiguration configuration = ViewConfiguration.get(context);
    maxFlingVelocity = configuration.getScaledMaximumFlingVelocity();
    minFlingVelocity = configuration.getScaledMinimumFlingVelocity();
    overflingDistance = configuration.getScaledOverflingDistance();
    overflingDistance = 0;//from  ww  w  .j ava 2  s  .  c o m
    /*overscrollDistance = configuration.getScaledOverscrollDistance();*/

    touchSlop = configuration.getScaledTouchSlop();

    scroller = new OverScroller(context);

    setEdgeEffectsEnabled(true);

}

---

From source file:com.acbelter.scheduleview.ScheduleView.java

private void init(Context context) {
    if (!isInEditMode()) {
        mOverScroller = new OverScroller(context);
        mGestureListener = new GestureDetector.SimpleOnGestureListener() {
            @Override//from ww w.j  ava  2  s. c o  m
            public boolean onDown(MotionEvent e) {
                if (DEBUG) {
                    Log.d(TAG, "onDown() y=" + mListY);
                }

                releaseEdgeEffects();
                mOverScroller.forceFinished(true);
                return true;
            }

            @Override
            public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
                if (DEBUG) {
                    Log.d(TAG, "onFling() y=" + mListY);
                }

                // Fling isn't needed
                if (mDeltaHeight < 0) {
                    return true;
                }

                mScrollDirection = velocityY > 0 ? 1 : -1;
                mOverScroller.fling(0, mListY, 0, (int) velocityY, 0, 0, -mDeltaHeight, 0);
                if (!awakenScrollBars()) {
                    ViewCompat.postInvalidateOnAnimation(ScheduleView.this);
                }
                return true;
            }

            @Override
            public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
                for (int i = 0; i < getChildCount(); i++) {
                    getChildAt(i).setPressed(false);
                }

                mListY -= (int) distanceY;
                recalculateOffset();

                positionItemViews();

                if (mListY == 0) {
                    mTopEdgeEffect.onPull(distanceY / (float) getHeight());
                    mTopEdgeEffectActive = true;
                }
                if (mListY == -mDeltaHeight) {
                    mBottomEdgeEffect.onPull(distanceY / (float) getHeight());
                    mBottomEdgeEffectActive = true;
                }

                if (!awakenScrollBars()) {
                    invalidate();
                }

                return true;
            }

            @Override
            public void onLongPress(MotionEvent e) {
                if (DEBUG) {
                    Log.d(TAG, "onLongPress() y=" + mListY);
                }

                View child;
                for (int i = 0; i < getChildCount(); i++) {
                    child = getChildAt(i);
                    child.getHitRect(mClickedViewBounds);
                    if (mClickedViewBounds.contains((int) e.getX(), (int) e.getY())) {
                        if (!mIsActionMode) {
                            mActionMode = startActionMode(mActionModeCallback);
                            mIsActionMode = true;
                        }

                        if (!child.isSelected()) {
                            mSelectedIds.add(mAdapter.getItemId(i));
                            child.setSelected(true);
                        } else {
                            mSelectedIds.remove(mAdapter.getItemId(i));
                            child.setSelected(false);
                        }

                        if (mSelectedIds.isEmpty()) {
                            finishActionMode();
                        }

                        invalidate();
                        return;
                    }
                }
            }

            @Override
            public boolean onSingleTapUp(MotionEvent e) {
                if (DEBUG) {
                    Log.d(TAG, "onSingleTapConfirmed() y=" + mListY);
                }

                View child;
                for (int i = 0; i < getChildCount(); i++) {
                    child = getChildAt(i);
                    child.getHitRect(mClickedViewBounds);
                    if (mClickedViewBounds.contains((int) e.getX(), (int) e.getY())) {
                        if (!mIsActionMode) {
                            OnItemClickListener callback = getOnItemClickListener();

                            if (callback != null) {
                                callback.onItemClick(ScheduleView.this, child, i, mAdapter.getItemId(i));
                            }
                        } else {
                            if (!child.isSelected()) {
                                mSelectedIds.add(mAdapter.getItemId(i));
                                child.setSelected(true);
                            } else {
                                mSelectedIds.remove(mAdapter.getItemId(i));
                                child.setSelected(false);
                            }

                            if (mSelectedIds.isEmpty()) {
                                finishActionMode();
                            }

                            invalidate();
                        }
                        break;
                    }
                }
                return true;
            }
        };

        mGestureDetector = new GestureDetector(context, mGestureListener);
    }
}

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From source file:freeflow.core.FreeFlowContainer.java

@Override
protected void init(Context context) {

    viewpool = new ViewPool();
    frames = new LinkedHashMap<Object, FreeFlowItem>();

    ViewConfiguration configuration = ViewConfiguration.get(context);
    maxFlingVelocity = configuration.getScaledMaximumFlingVelocity();
    minFlingVelocity = configuration.getScaledMinimumFlingVelocity();
    overflingDistance = configuration.getScaledOverflingDistance();
    overscrollDistance = configuration.getScaledOverscrollDistance();

    touchSlop = configuration.getScaledTouchSlop();

    scroller = new OverScroller(context);

    setEdgeEffectsEnabled(true);// ww  w  . j  av a  2s.c  o  m

}

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From source file:com.ickphum.android.isoview.InteractiveLineGraphView.java

public InteractiveLineGraphView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.InteractiveLineGraphView,
            defStyle, defStyle);/*from   w  w  w  .j av  a2 s. c o  m*/

    try {
        mLabelTextColor = a.getColor(R.styleable.InteractiveLineGraphView_labelTextColor, mLabelTextColor);
        mLabelTextSize = a.getDimension(R.styleable.InteractiveLineGraphView_labelTextSize, mLabelTextSize);
        mLabelSeparation = a.getDimensionPixelSize(R.styleable.InteractiveLineGraphView_labelSeparation,
                mLabelSeparation);

        mGridThickness = a.getDimension(R.styleable.InteractiveLineGraphView_gridThickness, mGridThickness);
        mGridColor = a.getColor(R.styleable.InteractiveLineGraphView_gridColor, mGridColor);

        mAxisThickness = a.getDimension(R.styleable.InteractiveLineGraphView_axisThickness, mAxisThickness);
        mAxisColor = a.getColor(R.styleable.InteractiveLineGraphView_axisColor, mAxisColor);

        mDataThickness = a.getDimension(R.styleable.InteractiveLineGraphView_dataThickness, mDataThickness);
        mDataColor = a.getColor(R.styleable.InteractiveLineGraphView_dataColor, mDataColor);
    } finally {
        a.recycle();
    }

    initPaints();

    // Sets up interactions
    if (!this.isInEditMode()) {
        mScaleGestureDetector = new ScaleGestureDetector(context, mScaleGestureListener);
        mGestureDetector = new GestureDetectorCompat(context, mGestureListener);
    }

    mScroller = new OverScroller(context);
    mZoomer = new Zoomer(context);

    // Sets up edge effects
    mEdgeEffectLeft = new EdgeEffectCompat(context);
    mEdgeEffectTop = new EdgeEffectCompat(context);
    mEdgeEffectRight = new EdgeEffectCompat(context);
    mEdgeEffectBottom = new EdgeEffectCompat(context);
}

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From source file:cn.androidy.androiddevelopmentpatterns.interactivechart.InteractiveLineGraphView.java

public InteractiveLineGraphView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    TypedArray a = context.getTheme().obtainStyledAttributes(attrs, R.styleable.InteractiveLineGraphView,
            defStyle, defStyle);//from  w  w w  . j a v  a  2s. c  om

    try {
        mLabelTextColor = a.getColor(R.styleable.InteractiveLineGraphView_labelTextColor, mLabelTextColor);
        mLabelTextSize = a.getDimension(R.styleable.InteractiveLineGraphView_labelTextSize, mLabelTextSize);
        mLabelSeparation = a.getDimensionPixelSize(R.styleable.InteractiveLineGraphView_labelSeparation,
                mLabelSeparation);

        mGridThickness = a.getDimension(R.styleable.InteractiveLineGraphView_gridThickness, mGridThickness);
        mGridColor = a.getColor(R.styleable.InteractiveLineGraphView_gridColor, mGridColor);

        mAxisThickness = a.getDimension(R.styleable.InteractiveLineGraphView_axisThickness, mAxisThickness);
        mAxisColor = a.getColor(R.styleable.InteractiveLineGraphView_axisColor, mAxisColor);

        mDataThickness = a.getDimension(R.styleable.InteractiveLineGraphView_dataThickness, mDataThickness);
        mDataColor = a.getColor(R.styleable.InteractiveLineGraphView_dataColor, mDataColor);
    } finally {
        a.recycle();
    }

    initPaints();

    // Sets up interactions
    mScaleGestureDetector = new ScaleGestureDetector(context, mScaleGestureListener);
    mGestureDetector = new GestureDetectorCompat(context, mGestureListener);

    mScroller = new OverScroller(context);
    mZoomer = new Zoomer(context);

    // Sets up edge effects
    mEdgeEffectLeft = new EdgeEffectCompat(context);
    mEdgeEffectTop = new EdgeEffectCompat(context);
    mEdgeEffectRight = new EdgeEffectCompat(context);
    mEdgeEffectBottom = new EdgeEffectCompat(context);
}

---

From source file:org.gdg.frisbee.android.view.MasonryView.java

public MasonryView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    if (attrs != null) {
        TypedArray a = getContext().obtainStyledAttributes(attrs, R.styleable.MasonryView);
        mColCount = a.getInteger(R.styleable.MasonryView_numColumns, 2);
        mDrawSelectorOnTop = a.getBoolean(R.styleable.MasonryView_drawSelectorOnTop, false);
    } else {//from w w  w  .  java  2s.  c o m
        mColCount = 2;
        mDrawSelectorOnTop = false;
    }

    final ViewConfiguration vc = ViewConfiguration.get(context);
    mTouchSlop = vc.getScaledTouchSlop();
    mMaximumVelocity = vc.getScaledMaximumFlingVelocity();
    mFlingVelocity = vc.getScaledMinimumFlingVelocity();
    mScroller = new OverScroller(getContext());
    this.setOverScrollMode(OVER_SCROLL_ALWAYS);
    mTopEdge = new EdgeEffectCompat(context);
    mBottomEdge = new EdgeEffectCompat(context);
    setWillNotDraw(false);
    setClipToPadding(false);
    this.setFocusableInTouchMode(false);

    if (mSelector == null) {
        useDefaultSelector();
    }
}

---

From source file:com.appunite.scroll.ScaleImageView.java

@SuppressWarnings("UnusedDeclaration")
public ScaleImageView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);

    final ViewConfiguration viewConfiguration = ViewConfiguration.get(context);
    mMinEdge = viewConfiguration.getScaledEdgeSlop();

    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ScaleImageView, defStyle, defStyle);
    assert a != null;

    Drawable src = null;/*  w w w. ja v a  2 s  . c  om*/
    try {
        mMinWidth = a.getDimensionPixelSize(R.styleable.ScaleImageView_android_minWidth, 0);
        mMinHeight = a.getDimensionPixelSize(R.styleable.ScaleImageView_android_minHeight, 0);
        src = a.getDrawable(R.styleable.ScaleImageView_android_src);
    } finally {
        a.recycle();
    }

    ScaleGestureDetector.OnScaleGestureListener scaleGestureListener = new ScaleGestureDetector.SimpleOnScaleGestureListener() {
        /**
         * This is the active focal point in terms of the viewport. Could be a local
         * variable but kept here to minimize per-frame allocations.
         */
        private PointF viewportFocus = new PointF();

        @Override
        public boolean onScaleBegin(ScaleGestureDetector scaleGestureDetector) {
            final ViewParent parent = getParent();
            if (parent != null) {
                parent.requestDisallowInterceptTouchEvent(true);
            }
            return true;
        }

        @Override
        public boolean onScale(ScaleGestureDetector scaleGestureDetector) {
            float focusX = scaleGestureDetector.getFocusX();
            float focusY = scaleGestureDetector.getFocusY();
            float scaleFactor = scaleGestureDetector.getScaleFactor();
            float previousScale = mScale;
            mScale *= scaleFactor;

            doScale(focusX, focusY, scaleFactor);
            return true;
        }

    };
    GestureDetector.SimpleOnGestureListener gestureListener = new GestureDetector.SimpleOnGestureListener() {
        @Override
        public boolean onDown(MotionEvent e) {

            releaseEdgeEffects();
            mScroller.forceFinished(true);
            ViewCompat.postInvalidateOnAnimation(ScaleImageView.this);
            return true;
        }

        @Override
        public boolean onSingleTapConfirmed(MotionEvent e) {
            return performClick();
        }

        @Override
        public boolean onDoubleTap(MotionEvent e) {
            mZoomer.forceFinished(true);
            mZoomStartScale = mScale;
            mZoomFocalPoint.set(e.getX(), e.getY());
            mZoomer.startZoom(ZOOM_AMOUNT);
            ViewCompat.postInvalidateOnAnimation(ScaleImageView.this);
            return true;
        }

        @Override
        public boolean onScroll(MotionEvent e1, MotionEvent e2, float distanceX, float distanceY) {
            getRealTranslation(mTranslation, mRealTranslation);
            mRealTranslation.offset(-distanceX, -distanceY);
            getTranslation(mRealTranslation, mTranslation);

            computeMaxScrollSize(mMaxScrollBuffer);
            getImageRect(mRectF);
            float scrolledX = -mRectF.left;
            float scrolledY = -mRectF.top;
            boolean canScrollX = mRectF.left > mContentRect.left || mRectF.right < mContentRect.right;
            boolean canScrollY = mRectF.top > mContentRect.top || mRectF.bottom < mContentRect.bottom;
            validateTranslation();

            disallowParentInterceptWhenOnEdge(distanceX, distanceY);

            if (mScale > mMinScale) {
                if (canScrollX && scrolledX < 0) {
                    mEdgeEffectLeft.onPull(scrolledX / (float) mContentRect.width());
                    mEdgeEffectLeftActive = true;
                }
                if (canScrollY && scrolledY < 0) {
                    mEdgeEffectTop.onPull(scrolledY / (float) mContentRect.height());
                    mEdgeEffectTopActive = true;
                }
                if (canScrollX && scrolledX > mMaxScrollBuffer.x) {
                    mEdgeEffectRight.onPull((scrolledX - mMaxScrollBuffer.x) / (float) mContentRect.width());
                    mEdgeEffectRightActive = true;
                }
                if (canScrollY && scrolledY > mMaxScrollBuffer.y) {
                    mEdgeEffectBottom.onPull((scrolledY - mMaxScrollBuffer.y) / (float) mContentRect.height());
                    mEdgeEffectBottomActive = true;
                }
            }

            ViewCompat.postInvalidateOnAnimation(ScaleImageView.this);
            return true;
        }

        private void disallowParentInterceptWhenOnEdge(float directionX, float directionY) {
            final ViewParent parent = getParent();
            if (parent != null && (mAllowParentHorizontalScroll || mAllowParentVerticalScroll)) {
                getImageRect(mRectF);
                if (mAllowParentHorizontalScroll) {
                    if (directionX > 0 && Math.abs(mRectF.right - mContentRect.right) > mMinEdge) {
                        parent.requestDisallowInterceptTouchEvent(true);
                    }
                    if (directionX < 0 && Math.abs(mRectF.left - mContentRect.left) > mMinEdge) {
                        parent.requestDisallowInterceptTouchEvent(true);
                    }
                }
                if (mAllowParentVerticalScroll) {
                    if (directionY > 0 && Math.abs(mRectF.bottom - mContentRect.bottom) > mMinEdge) {
                        parent.requestDisallowInterceptTouchEvent(true);
                    }
                    if (directionY < 0 && Math.abs(mRectF.top - mContentRect.top) > mMinEdge) {
                        parent.requestDisallowInterceptTouchEvent(true);
                    }
                }
            }
        }

        @Override
        public boolean onFling(MotionEvent e1, MotionEvent e2, float velocityX, float velocityY) {
            disallowParentInterceptWhenOnEdge(velocityX, velocityY);
            fling((int) -velocityX, (int) -velocityY);
            return true;
        }
    };

    mScaleGestureDetector = new ScaleGestureDetector(context, scaleGestureListener);
    mGestureDetector = new GestureDetectorCompat(context, gestureListener);

    mScroller = new OverScroller(context);
    mZoomer = new Zoomer(context);

    // Sets up edge effects
    mEdgeEffectLeft = new EdgeEffectCompat(context);
    mEdgeEffectTop = new EdgeEffectCompat(context);
    mEdgeEffectRight = new EdgeEffectCompat(context);
    mEdgeEffectBottom = new EdgeEffectCompat(context);

    setSrcDrawable(src);
}

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