Example usage for android.graphics PointF PointF

Introduction

In this page you can find the example usage for android.graphics PointF PointF.

Prototype

public PointF(float x, float y)

Source Link

Usage

From source file:android.support.v7.widget.StaggeredGridLayoutManager.java

@Override
public void smoothScrollToPosition(RecyclerView recyclerView, RecyclerView.State state, int position) {
    LinearSmoothScroller scroller = new LinearSmoothScroller(recyclerView.getContext()) {
        @Override/*from   www . j  ava2  s .com*/
        public PointF computeScrollVectorForPosition(int targetPosition) {
            final int direction = calculateScrollDirectionForPosition(targetPosition);
            if (direction == 0) {
                return null;
            }
            if (mOrientation == HORIZONTAL) {
                return new PointF(direction, 0);
            } else {
                return new PointF(0, direction);
            }
        }
    };
    scroller.setTargetPosition(position);
    startSmoothScroll(scroller);
}

From source file:com.bizcom.vc.widget.cus.SubsamplingScaleImageView.java

public PointF getCenter() {
    return new PointF(centerX, centerY);
}

From source file:android.support.v17.leanback.widget.GridLayoutManager.java

void startPositionSmoothScroller(int position) {
    LinearSmoothScroller linearSmoothScroller = new GridLinearSmoothScroller() {
        @Override// w w  w  .  j  av  a 2s  .  c  o m
        public PointF computeScrollVectorForPosition(int targetPosition) {
            if (getChildCount() == 0) {
                return null;
            }
            final int firstChildPos = getPosition(getChildAt(0));
            // TODO We should be able to deduce direction from bounds of current and target
            // focus, rather than making assumptions about positions and directionality
            final boolean isStart = mReverseFlowPrimary ? targetPosition > firstChildPos
                    : targetPosition < firstChildPos;
            final int direction = isStart ? -1 : 1;
            if (mOrientation == HORIZONTAL) {
                return new PointF(direction, 0);
            } else {
                return new PointF(0, direction);
            }
        }

    };
    linearSmoothScroller.setTargetPosition(position);
    startSmoothScroll(linearSmoothScroller);
}

From source file:me.ccrama.redditslide.Views.SubsamplingScaleImageView.java

/**
 * Get the translation required to place a given source coordinate at the center of the screen, with the center
 * adjusted for asymmetric padding. Accepts the desired scale as an argument, so this is independent of current
 * translate and scale. The result is fitted to bounds, putting the image point as near to the screen center as permitted.
 *//*  w ww. j ava  2s  . com*/
private PointF vTranslateForSCenter(float sCenterX, float sCenterY, float scale) {
    int vxCenter = getPaddingLeft() + (getWidth() - getPaddingRight() - getPaddingLeft()) / 2;
    int vyCenter = getPaddingTop() + (getHeight() - getPaddingBottom() - getPaddingTop()) / 2;
    if (satTemp == null) {
        satTemp = new ScaleAndTranslate(0, new PointF(0, 0));
    }
    satTemp.scale = scale;
    satTemp.vTranslate.set(vxCenter - (sCenterX * scale), vyCenter - (sCenterY * scale));
    fitToBounds(true, satTemp);
    return satTemp.vTranslate;
}

From source file:cc.flydev.launcher.Page.java

private PointF isFlingingToDelete() {
    ViewConfiguration config = ViewConfiguration.get(getContext());
    mVelocityTracker.computeCurrentVelocity(1000, config.getScaledMaximumFlingVelocity());

    if (mVelocityTracker.getYVelocity() < mFlingToDeleteThresholdVelocity) {
        // Do a quick dot product test to ensure that we are flinging upwards
        PointF vel = new PointF(mVelocityTracker.getXVelocity(), mVelocityTracker.getYVelocity());
        PointF upVec = new PointF(0f, -1f);
        float theta = (float) Math
                .acos(((vel.x * upVec.x) + (vel.y * upVec.y)) / (vel.length() * upVec.length()));
        if (theta <= Math.toRadians(FLING_TO_DELETE_MAX_FLING_DEGREES)) {
            return vel;
        }//w  w  w .  j  ava2  s  .  c  o m
    }
    return null;
}

From source file:com.n2hsu.launcher.Page.java

private PointF isFlingingToDelete() {
    ViewConfiguration config = ViewConfiguration.get(getContext());
    mVelocityTracker.computeCurrentVelocity(1000, config.getScaledMaximumFlingVelocity());

    if (mVelocityTracker.getYVelocity() < mFlingToDeleteThresholdVelocity) {
        // Do a quick dot product test to ensure that we are flinging
        // upwards
        PointF vel = new PointF(mVelocityTracker.getXVelocity(), mVelocityTracker.getYVelocity());
        PointF upVec = new PointF(0f, -1f);
        float theta = (float) Math
                .acos(((vel.x * upVec.x) + (vel.y * upVec.y)) / (vel.length() * upVec.length()));
        if (theta <= Math.toRadians(FLING_TO_DELETE_MAX_FLING_DEGREES)) {
            return vel;
        }// ww w  . ja  v a 2 s . com
    }
    return null;
}

From source file:me.ccrama.redditslide.Views.SubsamplingScaleImageView.java

/**
 * Fully zoom out and return the image to the middle of the screen. This might be useful if you have a view pager
 * and want images to be reset when the user has moved to another page.
 *//*w ww  .j av a  2s .com*/
public final void resetScaleAndCenter() {
    this.anim = null;
    this.pendingScale = limitedScale(0);
    if (isReady()) {
        this.sPendingCenter = new PointF(sWidth() / 2, sHeight() / 2);
    } else {
        this.sPendingCenter = new PointF(0, 0);
    }
    invalidate();
}