Example usage for android.graphics Rect offset

Introduction

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

Prototype

public void offset(int dx, int dy) 

Source Link

Document

Offset the rectangle by adding dx to its left and right coordinates, and adding dy to its top and bottom coordinates.

Usage

From source file:cn.dev4mob.app.ui.animationsdemo.ZoomActivity.java

/**
 * "Zooms" in a thumbnail view by assigning the high resolution image to a hidden "zoomed-in"
 * image view and animating its bounds to fit the entire activity content area. More
 * specifically:/*from  w  w  w. ja va 2  s  .  c om*/
 *
 * <ol>
 *   <li>Assign the high-res image to the hidden "zoomed-in" (expanded) image view.</li>
 *   <li>Calculate the starting and ending bounds for the expanded view.</li>
 *   <li>Animate each of four positioning/sizing properties (X, Y, SCALE_X, SCALE_Y)
 *       simultaneously, from the starting bounds to the ending bounds.</li>
 *   <li>Zoom back out by running the reverse animation on click.</li>
 * </ol>
 *
 * @param thumbView  The thumbnail view to zoom in.
 * @param imageResId The high-resolution version of the image represented by the thumbnail.
 */
private void zoomImageFromThumb(final View thumbView, int imageResId) {
    // If there's an animation in progress, cancel it immediately and proceed with this one.
    if (mCurrentAnimator != null) {
        mCurrentAnimator.cancel();
    }

    // Load the high-resolution "zoomed-in" image.
    final ImageView expandedImageView = (ImageView) findViewById(R.id.expanded_image);
    expandedImageView.setImageResource(imageResId);

    // Calculate the starting and ending bounds for the zoomed-in image. This step
    // involves lots of math. Yay, math.
    final Rect startBounds = new Rect();
    final Rect finalBounds = new Rect();
    final Point globalOffset = new Point();

    // The start bounds are the global visible rectangle of the thumbnail, and the
    // final bounds are the global visible rectangle of the container view. Also
    // set the container view's offset as the origin for the bounds, since that's
    // the origin for the positioning animation properties (X, Y).
    thumbView.getGlobalVisibleRect(startBounds);
    Timber.d("thumbview startBounds = %s", startBounds);
    findViewById(R.id.container).getGlobalVisibleRect(finalBounds, globalOffset);
    Timber.d("thumbview finalBoundst = %s", finalBounds);
    Timber.d("thumbview globalOffset = %s", globalOffset);
    startBounds.offset(-globalOffset.x, -globalOffset.y);
    finalBounds.offset(-globalOffset.x, -globalOffset.y);

    // Adjust the start bounds to be the same aspect ratio as the final bounds using the
    // "center crop" technique. This prevents undesirable stretching during the animation.
    // Also calculate the start scaling factor (the end scaling factor is always 1.0).
    float startScale;
    if ((float) finalBounds.width() / finalBounds.height() > (float) startBounds.width()
            / startBounds.height()) {
        // Extend start bounds horizontally
        startScale = (float) startBounds.height() / finalBounds.height();
        float startWidth = startScale * finalBounds.width();
        float deltaWidth = (startWidth - startBounds.width()) / 2;
        startBounds.left -= deltaWidth;
        startBounds.right += deltaWidth;
    } else {

        // Extend start bounds vertically
        startScale = (float) startBounds.width() / finalBounds.width();
        Timber.d("startSCale = %f", startScale);
        float startHeight = startScale * finalBounds.height();
        float deltaHeight = (startHeight - startBounds.height()) / 2;
        startBounds.top -= deltaHeight;
        startBounds.bottom += deltaHeight;
    }

    // Hide the thumbnail and show the zoomed-in view. When the animation begins,
    // it will position the zoomed-in view in the place of the thumbnail.
    thumbView.setAlpha(0f);
    expandedImageView.setVisibility(View.VISIBLE);

    // Set the pivot point for SCALE_X and SCALE_Y transformations to the top-left corner of
    // the zoomed-in view (the default is the center of the view).
    expandedImageView.setPivotX(0f);
    expandedImageView.setPivotY(0f);

    // Construct and run the parallel animation of the four translation and scale properties
    // (X, Y, SCALE_X, and SCALE_Y).
    AnimatorSet set = new AnimatorSet();
    set.play(ObjectAnimator.ofFloat(expandedImageView, View.X, startBounds.left, finalBounds.left))
            .with(ObjectAnimator.ofFloat(expandedImageView, View.Y, startBounds.top, finalBounds.top))
            .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_X, startScale, 1f))
            .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_Y, startScale, 1f));
    set.setDuration(mShortAnimationDuration);
    set.setInterpolator(new DecelerateInterpolator());
    set.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            mCurrentAnimator = null;
        }

        @Override
        public void onAnimationCancel(Animator animation) {
            mCurrentAnimator = null;
        }
    });
    set.start();
    mCurrentAnimator = set;

    // Upon clicking the zoomed-in image, it should zoom back down to the original bounds
    // and show the thumbnail instead of the expanded image.
    final float startScaleFinal = startScale;
    expandedImageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (mCurrentAnimator != null) {
                mCurrentAnimator.cancel();
            }

            // Animate the four positioning/sizing properties in parallel, back to their
            // original values.
            AnimatorSet set = new AnimatorSet();
            set.play(ObjectAnimator.ofFloat(expandedImageView, View.X, startBounds.left))
                    .with(ObjectAnimator.ofFloat(expandedImageView, View.Y, startBounds.top))
                    .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_X, startScaleFinal))
                    .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_Y, startScaleFinal));
            set.setDuration(mShortAnimationDuration);
            set.setInterpolator(new DecelerateInterpolator());
            set.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    thumbView.setAlpha(1f);
                    expandedImageView.setVisibility(View.GONE);
                    mCurrentAnimator = null;
                }

                @Override
                public void onAnimationCancel(Animator animation) {
                    thumbView.setAlpha(1f);
                    expandedImageView.setVisibility(View.GONE);
                    mCurrentAnimator = null;
                }
            });
            set.start();
            mCurrentAnimator = set;
        }
    });
}

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From source file:com.msn.support.gallery.ZoomActivity.java

/**
 * "Zooms" in a thumbnail view by assigning the high resolution image to a hidden "zoomed-in"
 * image view and animating its bounds to fit the entire activity content area. More
 * specifically:/*from  ww  w  .  j  a v a 2 s.c  o  m*/
 * <ol>
 *   <li>Assign the high-res image to the hidden "zoomed-in" (expanded) image view.</li>
 *   <li>Calculate the starting and ending bounds for the expanded view.</li>
 *   <li>Animate each of four positioning/sizing properties (X, Y, SCALE_X, SCALE_Y)
 *       simultaneously, from the starting bounds to the ending bounds.</li>
 *   <li>Zoom back out by running the reverse animation on click.</li>
 * </ol>
 * ??ImageView?
 * Activity
 * <ol>
 *     <li>???ImageView</li>
 *     <li>?ImageView?</li>
 *     <li>??ImageView?/?X, Y, SCALE_X, SCALE_Y
 *     ??</li>
 *     <li>???</li>
 * @param thumbView  The thumbnail view to zoom in. 
 * @param imageResId The high-resolution version of the image represented by the thumbnail.
 *                   
 */
@TargetApi(11)
private void zoomImageFromThumb(final View thumbView, int imageResId) {
    // If there's an animation in progress, cancel it immediately and proceed with this one.
    // ?
    if (mCurrentAnimator != null) {
        mCurrentAnimator.cancel();
    }

    // Load the high-resolution "zoomed-in" image.?ImageView
    final ImageView expandedImageView = (ImageView) findViewById(R.id.expanded_image);
    expandedImageView.setImageResource(imageResId);

    // Calculate the starting and ending bounds for the zoomed-in image. This step
    // involves lots of math. Yay, math.
    //?ImageView??
    final Rect startBounds = new Rect();
    final Rect finalBounds = new Rect();
    final Point globalOffset = new Point();

    // The start bounds are the global visible rectangle of the thumbnail, and the
    // final bounds are the global visible rectangle of the container view. Also
    // set the container view's offset as the origin for the bounds, since that's
    // the origin for the positioning animation properties (X, Y).
    // ?????
    // ????
    thumbView.getGlobalVisibleRect(startBounds);
    findViewById(R.id.container).getGlobalVisibleRect(finalBounds, globalOffset);
    Log.e("Test", "globalOffset.x=" + globalOffset.x + " globalOffset.y=" + globalOffset.y);
    Log.e("Test", "startBounds.top=" + startBounds.top + " startBounds.left=" + startBounds.left);
    startBounds.offset(-globalOffset.x, -globalOffset.y);
    Log.e("Test", "startBounds2.top=" + startBounds.top + " startBounds2.left=" + startBounds.left);
    finalBounds.offset(-globalOffset.x, -globalOffset.y);

    // Adjust the start bounds to be the same aspect ratio as the final bounds using the
    // "center crop" technique. This prevents undesirable stretching during the animation.
    // Also calculate the start scaling factor (the end scaling factor is always 1.0).
    // ??"center crop"???
    // ????1.0
    float startScale;
    if ((float) finalBounds.width() / finalBounds.height() > (float) startBounds.width()
            / startBounds.height()) {
        // Extend start bounds horizontally ?
        startScale = (float) startBounds.height() / finalBounds.height();
        float startWidth = startScale * finalBounds.width();
        float deltaWidth = (startWidth - startBounds.width()) / 2;
        startBounds.left -= deltaWidth;
        startBounds.right += deltaWidth;
    } else {
        // Extend start bounds vertically ?
        startScale = (float) startBounds.width() / finalBounds.width();
        float startHeight = startScale * finalBounds.height();
        float deltaHeight = (startHeight - startBounds.height()) / 2;
        startBounds.top -= deltaHeight;
        startBounds.bottom += deltaHeight;
    }

    // Hide the thumbnail and show the zoomed-in view. When the animation begins,
    // it will position the zoomed-in view in the place of the thumbnail.
    //thumbView.setAlpha(0f);
    expandedImageView.setVisibility(View.VISIBLE);

    // Set the pivot point for SCALE_X and SCALE_Y transformations to the top-left corner of
    // the zoomed-in view (the default is the center of the view).
    expandedImageView.setPivotX(0f);
    expandedImageView.setPivotY(0f);

    // Construct and run the parallel animation of the four translation and scale properties
    // (X, Y, SCALE_X, and SCALE_Y).
    AnimatorSet set = new AnimatorSet();
    set.play(ObjectAnimator.ofFloat(expandedImageView, View.X, startBounds.left, finalBounds.left))
            .with(ObjectAnimator.ofFloat(expandedImageView, View.Y, startBounds.top, finalBounds.top))
            .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_X, startScale, 1f))
            .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_Y, startScale, 1f));
    set.setDuration(mShortAnimationDuration);
    set.setInterpolator(new DecelerateInterpolator());
    set.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            mCurrentAnimator = null;
        }

        @Override
        public void onAnimationCancel(Animator animation) {
            mCurrentAnimator = null;
        }
    });
    set.start();
    mCurrentAnimator = set;

    // Upon clicking the zoomed-in image, it should zoom back down to the original bounds
    // and show the thumbnail instead of the expanded image.
    final float startScaleFinal = startScale;
    expandedImageView.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (mCurrentAnimator != null) {
                mCurrentAnimator.cancel();
            }

            // Animate the four positioning/sizing properties in parallel, back to their
            // original values.
            AnimatorSet set = new AnimatorSet();
            set.play(ObjectAnimator.ofFloat(expandedImageView, View.X, startBounds.left))
                    .with(ObjectAnimator.ofFloat(expandedImageView, View.Y, startBounds.top))
                    .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_X, startScaleFinal))
                    .with(ObjectAnimator.ofFloat(expandedImageView, View.SCALE_Y, startScaleFinal));
            set.setDuration(mShortAnimationDuration);
            set.setInterpolator(new DecelerateInterpolator());
            set.addListener(new AnimatorListenerAdapter() {
                @Override
                public void onAnimationEnd(Animator animation) {
                    thumbView.setAlpha(1f);
                    expandedImageView.setVisibility(View.GONE);
                    mCurrentAnimator = null;
                }

                @Override
                public void onAnimationCancel(Animator animation) {
                    thumbView.setAlpha(1f);
                    expandedImageView.setVisibility(View.GONE);
                    mCurrentAnimator = null;
                }
            });
            set.start();
            mCurrentAnimator = set;
        }
    });
}

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From source file:com.android.launcher3.Utilities.java

public static void scaleRectAboutCenter(Rect r, float scale) {
    if (scale != 1.0f) {
        int cx = r.centerX();
        int cy = r.centerY();
        r.offset(-cx, -cy);

        r.left = (int) (r.left * scale + 0.5f);
        r.top = (int) (r.top * scale + 0.5f);
        r.right = (int) (r.right * scale + 0.5f);
        r.bottom = (int) (r.bottom * scale + 0.5f);

        r.offset(cx, cy);/*from ww w  . jav a2  s  .  co m*/
    }
}

---

From source file:com.coco.draggablegridviewpager.DraggableGridViewPager.java

private void animateGap(int target) {
    for (int i = 0; i < getChildCount(); i++) {
        View v = getChildAt(i);/*from  w w  w  . j  ava 2s  .  co  m*/
        if (i == mLastDragged) {
            continue;
        }

        int newPos = i;
        if (mLastDragged < target && i >= mLastDragged + 1 && i <= target) {
            newPos--;
        } else if (target < mLastDragged && i >= target && i < mLastDragged) {
            newPos++;
        }

        int oldPos = i;
        if (newPositions.get(i) != -1) {
            oldPos = newPositions.get(i);
        }

        if (oldPos == newPos) {
            continue;
        }

        // animate
        DEBUG_LOG("animateGap from=" + oldPos + ", to=" + newPos);
        final Rect oldRect = getRectByPosition(oldPos);
        final Rect newRect = getRectByPosition(newPos);
        oldRect.offset(-v.getLeft(), -v.getTop());
        newRect.offset(-v.getLeft(), -v.getTop());

        TranslateAnimation translate = new TranslateAnimation(oldRect.left, newRect.left, oldRect.top,
                newRect.top);
        translate.setDuration(ANIMATION_DURATION);
        translate.setFillEnabled(true);
        translate.setFillAfter(true);
        v.clearAnimation();
        v.startAnimation(translate);

        newPositions.set(i, newPos);
    }
}

---

From source file:com.android.hcframe.DraggableGridViewPager.java

private int getTargetByXY(int x, int y) {
    final int position = getPositionByXY(x, y);
    if (position < 0) {
        return -1;
    }//from  w w  w.  j  av a  2s .c  o  m
    final Rect r = getRectByPosition(position);
    final int page = position / mPageSize;
    r.inset(r.width() / 4, r.height() / 4);
    r.offset(-getWidth() * page, 0);
    if (!r.contains(x, y)) {
        return -1;
    }
    return position;
}

---

From source file:com.android.hcframe.DraggableGridViewPager.java

private void animateGap(int target) {
    for (int i = 0; i < getChildCount(); i++) {
        View v = getChildAt(i);//from   w  w  w  . j a  v  a2 s . com
        if (i == mLastDragged) {
            continue;
        }

        int newPos = i;
        if (mLastDragged < target && i >= mLastDragged + 1 && i <= target) {
            newPos--;
        } else if (target < mLastDragged && i >= target && i < mLastDragged) {
            newPos++;
        }

        int oldPos = i;
        if (newPositions.get(i) != -1) {
            oldPos = newPositions.get(i);
        }

        if (oldPos == newPos) {
            continue;
        }

        // animate
        HcLog.D("animateGap from=" + oldPos + ", to=" + newPos);
        final Rect oldRect = getRectByPosition(oldPos);
        final Rect newRect = getRectByPosition(newPos);
        oldRect.offset(-v.getLeft(), -v.getTop());
        newRect.offset(-v.getLeft(), -v.getTop());

        TranslateAnimation translate = new TranslateAnimation(oldRect.left, newRect.left, oldRect.top,
                newRect.top);
        translate.setDuration(ANIMATION_DURATION);
        translate.setFillEnabled(true);
        translate.setFillAfter(true);
        v.clearAnimation();
        v.startAnimation(translate);

        newPositions.set(i, newPos);
    }
}

---

From source file:com.icloud.listenbook.base.view.DraggableGridViewPager.java

/**
 * //from  w w w. j  a  v a 2s  .  c  om
 * */
private void animateGap(int target) {
    for (int i = 0; i < getChildCount(); i++) {
        View v = getChildAt(i);
        // 
        if (i == mLastDragged) {
            continue;
        }
        // ??
        int newPos = i;
        // ? ?? ????? ? ?? ?
        if (mLastDragged < target && i >= mLastDragged + 1 && i <= target) {
            newPos--;
        } else if (target < mLastDragged && i >= target && i < mLastDragged) {
            newPos++;
        }
        // ??
        int oldPos = i;
        if (newPositions.get(i) != -1) {
            oldPos = newPositions.get(i);
        }

        if (oldPos == newPos) {
            continue;
        }

        // animate
        // ?
        DEBUG_LOG("animateGap from=" + oldPos + ", to=" + newPos);
        final Rect oldRect = getRectByPosition(oldPos);
        final Rect newRect = getRectByPosition(newPos);
        oldRect.offset(-v.getLeft(), -v.getTop());
        newRect.offset(-v.getLeft(), -v.getTop());

        TranslateAnimation translate = new TranslateAnimation(oldRect.left, newRect.left, oldRect.top,
                newRect.top);
        translate.setDuration(ANIMATION_DURATION);
        translate.setFillEnabled(true);
        translate.setFillAfter(true);
        v.clearAnimation();
        v.startAnimation(translate);

        newPositions.set(i, newPos);
    }
}

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From source file:com.android.mail.browse.ConversationItemView.java

@Override
public void invalidateDrawable(final Drawable who) {
    boolean handled = false;
    if (mCoordinates != null) {
        if (mSendersImageView.equals(who)) {
            final Rect r = new Rect(who.getBounds());
            r.offset(mCoordinates.contactImagesX, mCoordinates.contactImagesY);
            ConversationItemView.this.invalidate(r.left, r.top, r.right, r.bottom);
            handled = true;/*w ww  . ja v a  2 s  . c o m*/
        }
    }
    if (!handled) {
        super.invalidateDrawable(who);
    }
}

---

From source file:com.icloud.listenbook.base.view.DraggableGridViewPager.java

/**
 * ?/*  w ww  .  ja v a 2 s . com*/
 * */
private int getTargetByXY(int x, int y) {
    // ?
    final int position = getPositionByXY(x, y);
    if (position < 0) {
        return -1;
    }
    // ?
    final Rect r = getRectByPosition(position);
    final int page = position / mPageSize;
    // ?? ??
    r.inset(r.width() / 4, r.height() / 4);
    // ??
    r.offset(-getWidth() * page, 0);
    // ?? ?
    if (!r.contains(x, y)) {
        return -1;
    }
    return position;
}

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From source file:org.androfarsh.widget.DragGridLayout.java

private boolean isSpaceFree(LayoutParams lp, Region freeRagion) {
    if (mCells.isEmpty() || (lp.mX == UNKNOWN) || (lp.mY == UNKNOWN)) {
        return false;
    }//  ww w .j  av  a 2s .c  o m

    final Rect rect = new Rect(lp.leftMargin, lp.topMargin, (lp.mHorizontalSize * mCellSize) - lp.rightMargin,
            (lp.mVerticalSize * mCellSize) - lp.bottomMargin);
    rect.offset(lp.mX, lp.mY);

    mTmpRegion.set(freeRagion);
    mTmpRegion.op(rect, Op.INTERSECT);
    if (!mTmpRegion.isEmpty() && mTmpRegion.isRect()) {
        mTmpRegion.getBounds(mTmpRect);
        return ((mTmpRect.width() == rect.width()) && (mTmpRect.height() == rect.height()));
    }
    return false;
}

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