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:com.android.launcher3.CellLayout.java

private void getDirectionVectorForDrop(int dragViewCenterX, int dragViewCenterY, int spanX, int spanY,
        View dragView, int[] resultDirection) {
    int[] targetDestination = new int[2];

    findNearestArea(dragViewCenterX, dragViewCenterY, spanX, spanY, targetDestination);
    Rect dragRect = new Rect();
    regionToRect(targetDestination[0], targetDestination[1], spanX, spanY, dragRect);
    dragRect.offset(dragViewCenterX - dragRect.centerX(), dragViewCenterY - dragRect.centerY());

    Rect dropRegionRect = new Rect();
    getViewsIntersectingRegion(targetDestination[0], targetDestination[1], spanX, spanY, dragView,
            dropRegionRect, mIntersectingViews);

    int dropRegionSpanX = dropRegionRect.width();
    int dropRegionSpanY = dropRegionRect.height();

    regionToRect(dropRegionRect.left, dropRegionRect.top, dropRegionRect.width(), dropRegionRect.height(),
            dropRegionRect);// w  w  w. ja v  a 2 s. co  m

    int deltaX = (dropRegionRect.centerX() - dragViewCenterX) / spanX;
    int deltaY = (dropRegionRect.centerY() - dragViewCenterY) / spanY;

    if (dropRegionSpanX == mCountX || spanX == mCountX) {
        deltaX = 0;
    }
    if (dropRegionSpanY == mCountY || spanY == mCountY) {
        deltaY = 0;
    }

    if (deltaX == 0 && deltaY == 0) {
        // No idea what to do, give a random direction.
        resultDirection[0] = 1;
        resultDirection[1] = 0;
    } else {
        computeDirectionVector(deltaX, deltaY, resultDirection);
    }
}

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

@Override
    public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) {

        int rectTopWithinChild = rect.top;

        // offset so rect is in coordinates of the this view
        rect.offset(child.getLeft(), child.getTop());
        rect.offset(-child.getScrollX(), -child.getScrollY());

        final int height = getHeight();
        int listUnfadedTop = getScrollY();
        int listUnfadedBottom = listUnfadedTop + height;
        final int fadingEdge = getVerticalFadingEdgeLength();

        if (showingTopFadingEdge()) {
            // leave room for top fading edge as long as rect isn't at very top
            if ((mSelectedPosition > 0) || (rectTopWithinChild > fadingEdge)) {
                listUnfadedTop += fadingEdge;
            }//from   w ww  . j a  v  a2s .  c o  m
        }

        int childCount = getChildCount();
        int bottomOfBottomChild = getChildAt(childCount - 1).getBottom();

        if (showingBottomFadingEdge()) {
            // leave room for bottom fading edge as long as rect isn't at very bottom
            if ((mSelectedPosition < mItemCount - 1) || (rect.bottom < (bottomOfBottomChild - fadingEdge))) {
                listUnfadedBottom -= fadingEdge;
            }
        }

        int scrollYDelta = 0;

        if (rect.bottom > listUnfadedBottom && rect.top > listUnfadedTop) {
            // need to MOVE DOWN to get it in view: move down just enough so
            // that the entire rectangle is in view (or at least the first
            // screen size chunk).

            if (rect.height() > height) {
                // just enough to get screen size chunk on
                scrollYDelta += (rect.top - listUnfadedTop);
            } else {
                // get entire rect at bottom of screen
                scrollYDelta += (rect.bottom - listUnfadedBottom);
            }

            // make sure we aren't scrolling beyond the end of our children
            int distanceToBottom = bottomOfBottomChild - listUnfadedBottom;
            scrollYDelta = Math.min(scrollYDelta, distanceToBottom);
        } else if (rect.top < listUnfadedTop && rect.bottom < listUnfadedBottom) {
            // need to MOVE UP to get it in view: move up just enough so that
            // entire rectangle is in view (or at least the first screen
            // size chunk of it).

            if (rect.height() > height) {
                // screen size chunk
                scrollYDelta -= (listUnfadedBottom - rect.bottom);
            } else {
                // entire rect at top
                scrollYDelta -= (listUnfadedTop - rect.top);
            }

            // make sure we aren't scrolling any further than the top our children
            int top = getChildAt(0).getTop();
            int deltaToTop = top - listUnfadedTop;
            scrollYDelta = Math.max(scrollYDelta, deltaToTop);
        }

        final boolean scroll = scrollYDelta != 0;
        if (scroll) {
            scrollListItemsBy(-scrollYDelta);
            positionSelector(child);
            mSelectedTop = child.getTop();
            invalidate();
        }
        return scroll;
    }

---

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

@Override
    protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
        super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);

        int closetChildIndex = -1;
        if (gainFocus && previouslyFocusedRect != null) {
            previouslyFocusedRect.offset(getScrollX(), getScrollY());

            // figure out which item should be selected based on previously
            // focused rect
            Rect otherRect = mTempRect;//from   w  w w  .  j  a va2 s . com
            int minDistance = Integer.MAX_VALUE;
            final int childCount = getChildCount();
            final int firstPosition = mFirstPosition;
            final ListAdapter adapter = mAdapter;

            for (int i = 0; i < childCount; i++) {
                // only consider selectable views
                if (!adapter.isEnabled(firstPosition + i)) {
                    continue;
                }

                View other = getChildAt(i);
                other.getDrawingRect(otherRect);
                offsetDescendantRectToMyCoords(other, otherRect);
                int distance = getDistance(previouslyFocusedRect, otherRect, direction);

                if (distance < minDistance) {
                    minDistance = distance;
                    closetChildIndex = i;
                }
            }
        }

        if (closetChildIndex >= 0) {
            setSelection(closetChildIndex + mFirstPosition);
        } else {
            requestLayout();
        }
    }

---

From source file:com.appunite.list.HorizontalListView.java

@Override
public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) {

    int rectTopWithinChild = rect.top;

    // offset so rect is in coordinates of the this view
    rect.offset(child.getLeft(), child.getTop());
    rect.offset(-child.getScrollX(), -child.getScrollY());

    final int width = getWidth();
    int listUnfadedLeft = getScrollX();
    int listUnfadedRight = listUnfadedLeft + width;
    final int fadingEdge = getHorizontalFadingEdgeLength();

    if (showingLeftFadingEdge()) {
        // leave room for top fading edge as long as rect isn't at very top
        if ((mSelectedPosition > 0) || (rectTopWithinChild > fadingEdge)) {
            listUnfadedLeft += fadingEdge;
        }//  w ww  .  ja va2s  .  co  m
    }

    int childCount = getChildCount();
    int rightOfRightChild = getChildAt(childCount - 1).getRight();

    if (showingRightFadingEdge()) {
        // leave room for bottom fading edge as long as rect isn't at very bottom
        if ((mSelectedPosition < mItemCount - 1) || (rect.bottom < (rightOfRightChild - fadingEdge))) {
            listUnfadedRight -= fadingEdge;
        }
    }

    int scrollXDelta = 0;

    if (rect.right > listUnfadedRight && rect.left > listUnfadedLeft) {
        // need to MOVE DOWN to get it in view: move down just enough so
        // that the entire rectangle is in view (or at least the first
        // screen size chunk).

        if (rect.width() > width) {
            // just enough to get screen size chunk on
            scrollXDelta += (rect.left - listUnfadedLeft);
        } else {
            // get entire rect at bottom of screen
            scrollXDelta += (rect.right - listUnfadedRight);
        }

        // make sure we aren't scrolling beyond the end of our children
        int distanceToRight = rightOfRightChild - listUnfadedRight;
        scrollXDelta = Math.min(scrollXDelta, distanceToRight);
    } else if (rect.left < listUnfadedLeft && rect.right < listUnfadedRight) {
        // need to MOVE UP to get it in view: move up just enough so that
        // entire rectangle is in view (or at least the first screen
        // size chunk of it).

        if (rect.width() > width) {
            // screen size chunk
            scrollXDelta -= (listUnfadedRight - rect.right);
        } else {
            // entire rect at top
            scrollXDelta -= (listUnfadedLeft - rect.left);
        }

        // make sure we aren't scrolling any further than the top our children
        int left = getChildAt(0).getLeft();
        int deltaToTop = left - listUnfadedLeft;
        scrollXDelta = Math.max(scrollXDelta, deltaToTop);
    }

    final boolean scroll = scrollXDelta != 0;
    if (scroll) {
        scrollListItemsBy(-scrollXDelta);
        positionSelector(INVALID_POSITION, child);
        mSelectedLeft = child.getLeft();
        invalidate();
    }
    return scroll;
}

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From source file:com.awrtechnologies.carbudgetsales.hlistview.widget.HListView.java

@Override
public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) {

    int rectLeftWithinChild = rect.left;

    // offset so rect is in coordinates of the this view
    rect.offset(child.getLeft(), child.getTop());
    rect.offset(-child.getScrollX(), -child.getScrollY());

    final int width = getWidth();
    int listUnfadedLeft = getScrollX();
    int listUnfadedRight = listUnfadedLeft + width;
    final int fadingEdge = getHorizontalFadingEdgeLength();

    if (showingLeftFadingEdge()) {
        // leave room for top fading edge as long as rect isn't at very top
        if ((mSelectedPosition > 0) || (rectLeftWithinChild > fadingEdge)) {
            listUnfadedLeft += fadingEdge;
        }// w  w  w  . j a  v a 2 s  .co m
    }

    int childCount = getChildCount();
    int rightOfRightChild = getChildAt(childCount - 1).getRight();

    if (showingRightFadingEdge()) {
        // leave room for bottom fading edge as long as rect isn't at very bottom
        if ((mSelectedPosition < mItemCount - 1) || (rect.right < (rightOfRightChild - fadingEdge))) {
            listUnfadedRight -= fadingEdge;
        }
    }

    int scrollXDelta = 0;

    if (rect.right > listUnfadedRight && rect.left > listUnfadedLeft) {
        // need to MOVE DOWN to get it in view: move down just enough so
        // that the entire rectangle is in view (or at least the first
        // screen size chunk).

        if (rect.width() > width) {
            // just enough to get screen size chunk on
            scrollXDelta += (rect.left - listUnfadedLeft);
        } else {
            // get entire rect at bottom of screen
            scrollXDelta += (rect.right - listUnfadedRight);
        }

        // make sure we aren't scrolling beyond the end of our children
        int distanceToRight = rightOfRightChild - listUnfadedRight;
        scrollXDelta = Math.min(scrollXDelta, distanceToRight);
    } else if (rect.left < listUnfadedLeft && rect.right < listUnfadedRight) {
        // need to MOVE UP to get it in view: move up just enough so that
        // entire rectangle is in view (or at least the first screen
        // size chunk of it).

        if (rect.width() > width) {
            // screen size chunk
            scrollXDelta -= (listUnfadedRight - rect.right);
        } else {
            // entire rect at top
            scrollXDelta -= (listUnfadedLeft - rect.left);
        }

        // make sure we aren't scrolling any further than the top our children
        int left = getChildAt(0).getLeft();
        int deltaToLeft = left - listUnfadedLeft;
        scrollXDelta = Math.max(scrollXDelta, deltaToLeft);
    }

    final boolean scroll = scrollXDelta != 0;
    if (scroll) {
        scrollListItemsBy(-scrollXDelta);
        positionSelector(INVALID_POSITION, child);
        mSelectedLeft = child.getTop();
        invalidate();
    }
    return scroll;
}

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From source file:com.appunite.list.ListView.java

@Override
public boolean requestChildRectangleOnScreen(View child, Rect rect, boolean immediate) {

    int rectTopWithinChild = rect.top;

    // offset so rect is in coordinates of the this view
    rect.offset(child.getLeft(), child.getTop());
    rect.offset(-child.getScrollX(), -child.getScrollY());

    final int height = getHeight();
    int listUnfadedTop = getScrollY();
    int listUnfadedBottom = listUnfadedTop + height;
    final int fadingEdge = getVerticalFadingEdgeLength();

    if (showingTopFadingEdge()) {
        // leave room for top fading edge as long as rect isn't at very top
        if ((mSelectedPosition > 0) || (rectTopWithinChild > fadingEdge)) {
            listUnfadedTop += fadingEdge;
        }//ww  w .j av a 2  s. co m
    }

    int childCount = getChildCount();
    int bottomOfBottomChild = getChildAt(childCount - 1).getBottom();

    if (showingBottomFadingEdge()) {
        // leave room for bottom fading edge as long as rect isn't at very bottom
        if ((mSelectedPosition < mItemCount - 1) || (rect.bottom < (bottomOfBottomChild - fadingEdge))) {
            listUnfadedBottom -= fadingEdge;
        }
    }

    int scrollYDelta = 0;

    if (rect.bottom > listUnfadedBottom && rect.top > listUnfadedTop) {
        // need to MOVE DOWN to get it in view: move down just enough so
        // that the entire rectangle is in view (or at least the first
        // screen size chunk).

        if (rect.height() > height) {
            // just enough to get screen size chunk on
            scrollYDelta += (rect.top - listUnfadedTop);
        } else {
            // get entire rect at bottom of screen
            scrollYDelta += (rect.bottom - listUnfadedBottom);
        }

        // make sure we aren't scrolling beyond the end of our children
        int distanceToBottom = bottomOfBottomChild - listUnfadedBottom;
        scrollYDelta = Math.min(scrollYDelta, distanceToBottom);
    } else if (rect.top < listUnfadedTop && rect.bottom < listUnfadedBottom) {
        // need to MOVE UP to get it in view: move up just enough so that
        // entire rectangle is in view (or at least the first screen
        // size chunk of it).

        if (rect.height() > height) {
            // screen size chunk
            scrollYDelta -= (listUnfadedBottom - rect.bottom);
        } else {
            // entire rect at top
            scrollYDelta -= (listUnfadedTop - rect.top);
        }

        // make sure we aren't scrolling any further than the top our children
        int top = getChildAt(0).getTop();
        int deltaToTop = top - listUnfadedTop;
        scrollYDelta = Math.max(scrollYDelta, deltaToTop);
    }

    final boolean scroll = scrollYDelta != 0;
    if (scroll) {
        scrollListItemsBy(-scrollYDelta);
        positionSelector(INVALID_POSITION, child);
        mSelectedTop = child.getTop();
        invalidate();
    }
    return scroll;
}

---

From source file:com.android.launcher2.Workspace.java

/**
 * Returns a new bitmap to be used as the object outline, e.g. to visualize the drop location.
 * Responsibility for the bitmap is transferred to the caller.
 *///w w  w .java2 s . c o m
private Bitmap createDragOutline(Bitmap orig, Canvas canvas, int padding, int w, int h, boolean clipAlpha) {
    final int outlineColor = getResources().getColor(android.R.color.holo_blue_light);
    final Bitmap b = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888);
    canvas.setBitmap(b);

    Rect src = new Rect(0, 0, orig.getWidth(), orig.getHeight());
    float scaleFactor = Math.min((w - padding) / (float) orig.getWidth(),
            (h - padding) / (float) orig.getHeight());
    int scaledWidth = (int) (scaleFactor * orig.getWidth());
    int scaledHeight = (int) (scaleFactor * orig.getHeight());
    Rect dst = new Rect(0, 0, scaledWidth, scaledHeight);

    // center the image
    dst.offset((w - scaledWidth) / 2, (h - scaledHeight) / 2);

    canvas.drawBitmap(orig, src, dst, null);
    mOutlineHelper.applyMediumExpensiveOutlineWithBlur(b, canvas, outlineColor, outlineColor, clipAlpha);
    canvas.setBitmap(null);

    return b;
}

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From source file:com.awrtechnologies.carbudgetsales.hlistview.widget.HListView.java

@Override
protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
    super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);

    final ListAdapter adapter = mAdapter;
    int closetChildIndex = -1;
    int closestChildLeft = 0;
    if (adapter != null && gainFocus && previouslyFocusedRect != null) {
        previouslyFocusedRect.offset(getScrollX(), getScrollY());

        // Don't cache the result of getChildCount or mFirstPosition here,
        // it could change in layoutChildren.
        if (adapter.getCount() < getChildCount() + mFirstPosition) {
            mLayoutMode = LAYOUT_NORMAL;
            layoutChildren();// w  ww . j ava 2  s. c  o  m
        }

        // figure out which item should be selected based on previously
        // focused rect
        Rect otherRect = mTempRect;
        int minDistance = Integer.MAX_VALUE;
        final int childCount = getChildCount();
        final int firstPosition = mFirstPosition;

        for (int i = 0; i < childCount; i++) {
            // only consider selectable views
            if (!adapter.isEnabled(firstPosition + i)) {
                continue;
            }

            View other = getChildAt(i);
            other.getDrawingRect(otherRect);
            offsetDescendantRectToMyCoords(other, otherRect);
            int distance = getDistance(previouslyFocusedRect, otherRect, direction);

            if (distance < minDistance) {
                minDistance = distance;
                closetChildIndex = i;
                closestChildLeft = other.getLeft();
            }
        }
    }

    if (closetChildIndex >= 0) {
        setSelectionFromLeft(closetChildIndex + mFirstPosition, closestChildLeft);
    } else {
        requestLayout();
    }
}

---

From source file:com.appunite.list.HorizontalListView.java

@Override
protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
    super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);

    final ListAdapter adapter = mAdapter;
    int closetChildIndex = -1;
    int closestChildLeft = 0;
    if (adapter != null && gainFocus && previouslyFocusedRect != null) {
        final int scrollX = getScrollX();
        final int scrollY = getScrollY();
        previouslyFocusedRect.offset(scrollX, scrollY);

        // Don't cache the result of getChildCount or mFirstPosition here,
        // it could change in layoutChildren.
        if (adapter.getCount() < getChildCount() + mFirstPosition) {
            mLayoutMode = LAYOUT_NORMAL;
            layoutChildren();//  w  ww  .jav  a2 s  . c o  m
        }

        // figure out which item should be selected based on previously
        // focused rect
        Rect otherRect = mTempRect;
        int minDistance = Integer.MAX_VALUE;
        final int childCount = getChildCount();
        final int firstPosition = mFirstPosition;

        for (int i = 0; i < childCount; i++) {
            // only consider selectable views
            if (!adapter.isEnabled(firstPosition + i)) {
                continue;
            }

            View other = getChildAt(i);
            other.getDrawingRect(otherRect);
            offsetDescendantRectToMyCoords(other, otherRect);
            int distance = getDistance(previouslyFocusedRect, otherRect, direction);

            if (distance < minDistance) {
                minDistance = distance;
                closetChildIndex = i;
                closestChildLeft = other.getLeft();
            }
        }
    }

    if (closetChildIndex >= 0) {
        setSelectionFromLeft(closetChildIndex + mFirstPosition, closestChildLeft);
    } else {
        requestLayout();
    }
}

---

From source file:com.appunite.list.ListView.java

@Override
protected void onFocusChanged(boolean gainFocus, int direction, Rect previouslyFocusedRect) {
    super.onFocusChanged(gainFocus, direction, previouslyFocusedRect);

    final ListAdapter adapter = mAdapter;
    int closetChildIndex = -1;
    int closestChildTop = 0;
    if (adapter != null && gainFocus && previouslyFocusedRect != null) {
        final int scrollX = getScrollX();
        final int scrollY = getScrollY();
        previouslyFocusedRect.offset(scrollX, scrollY);

        // Don't cache the result of getChildCount or mFirstPosition here,
        // it could change in layoutChildren.
        if (adapter.getCount() < getChildCount() + mFirstPosition) {
            mLayoutMode = LAYOUT_NORMAL;
            layoutChildren();//from  ww w  .  j  av  a  2  s . c o m
        }

        // figure out which item should be selected based on previously
        // focused rect
        Rect otherRect = mTempRect;
        int minDistance = Integer.MAX_VALUE;
        final int childCount = getChildCount();
        final int firstPosition = mFirstPosition;

        for (int i = 0; i < childCount; i++) {
            // only consider selectable views
            if (!adapter.isEnabled(firstPosition + i)) {
                continue;
            }

            View other = getChildAt(i);
            other.getDrawingRect(otherRect);
            offsetDescendantRectToMyCoords(other, otherRect);
            int distance = getDistance(previouslyFocusedRect, otherRect, direction);

            if (distance < minDistance) {
                minDistance = distance;
                closetChildIndex = i;
                closestChildTop = other.getTop();
            }
        }
    }

    if (closetChildIndex >= 0) {
        setSelectionFromTop(closetChildIndex + mFirstPosition, closestChildTop);
    } else {
        requestLayout();
    }
}

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