Example usage for android.graphics Canvas restoreToCount

Introduction

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

Prototype

public void restoreToCount(int saveCount) 

Source Link

Document

Efficient way to pop any calls to save() that happened after the save count reached saveCount.

Usage

From source file:com.aliasapps.seq.scroller.TwoWayView.java

private boolean drawEndEdge(Canvas canvas) {
    if (mEndEdge.isFinished()) {
        return false;
    }/*from  w w w .  ja  va2 s  .c o  m*/

    final int restoreCount = canvas.save();
    final int width = getWidth() - getPaddingLeft() - getPaddingRight();
    final int height = getHeight() - getPaddingTop() - getPaddingBottom();

    if (mIsVertical) {
        canvas.translate(-width, height);
        canvas.rotate(180, width, 0);
    } else {
        canvas.translate(width, 0);
        canvas.rotate(90);
    }

    final boolean needsInvalidate = mEndEdge.draw(canvas);
    canvas.restoreToCount(restoreCount);
    return needsInvalidate;
}

---

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

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    if (mEdgeGlowLeft != null) {
        final int scrollX = getScrollX();
        boolean needsInvalidate = false;
        if (!mEdgeGlowLeft.isFinished()) {
            final int restoreCount = canvas.save();
            final int topPadding = mListPadding.top + mGlowPaddingTop;
            final int bottomPadding = mListPadding.bottom + mGlowPaddingBottom;
            final int height = getHeight() - topPadding - bottomPadding;

            int edgeX = Math.min(0, scrollX + mFirstPositionDistanceGuess);
            canvas.translate(edgeX, height + topPadding);
            canvas.rotate(-90, 0, 0);//from   w ww  .  jav  a  2s. c o  m
            mEdgeGlowLeft.setSize(height, getWidth());
            if (mEdgeGlowLeft.draw(canvas)) {
                needsInvalidate = true;
            }
            canvas.restoreToCount(restoreCount);
        }
        if (!mEdgeGlowRight.isFinished()) {
            final int restoreCount = canvas.save();
            final int topPadding = mListPadding.top + mGlowPaddingTop;
            final int bottomPadding = mListPadding.bottom + mGlowPaddingBottom;
            final int height = getHeight() - topPadding - bottomPadding;
            final int width = getWidth();

            int edgeY = topPadding;
            int edgeX = Math.max(width, scrollX + mLastPositionDistanceGuess);

            canvas.translate(edgeX, edgeY);
            canvas.rotate(90, 0, 0);

            mEdgeGlowRight.setSize(height, width);
            if (mEdgeGlowRight.draw(canvas)) {
                needsInvalidate = true;
            }
            canvas.restoreToCount(restoreCount);
        }
        if (needsInvalidate) {
            invalidate();
        }
    }
}

---

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

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    if (mEdgeGlowTop != null) {
        final int scrollY = getScrollY();
        boolean needsInvalidate = false;
        if (!mEdgeGlowTop.isFinished()) {
            final int restoreCount = canvas.save();
            final int leftPadding = mListPadding.left + mGlowPaddingLeft;
            final int rightPadding = mListPadding.right + mGlowPaddingRight;
            final int width = getWidth() - leftPadding - rightPadding;

            int edgeY = Math.min(0, scrollY + mFirstPositionDistanceGuess);
            canvas.translate(leftPadding, edgeY);
            mEdgeGlowTop.setSize(width, getHeight());
            if (mEdgeGlowTop.draw(canvas)) {
                needsInvalidate = true;//from   w  w w  . j a v  a2 s .c  o m
            }
            canvas.restoreToCount(restoreCount);
        }
        if (!mEdgeGlowBottom.isFinished()) {
            final int restoreCount = canvas.save();
            final int leftPadding = mListPadding.left + mGlowPaddingLeft;
            final int rightPadding = mListPadding.right + mGlowPaddingRight;
            final int width = getWidth() - leftPadding - rightPadding;
            final int height = getHeight();

            int edgeX = -width + leftPadding;
            int edgeY = Math.max(height, scrollY + mLastPositionDistanceGuess);
            canvas.translate(edgeX, edgeY);
            canvas.rotate(180, width, 0);
            mEdgeGlowBottom.setSize(width, height);
            if (mEdgeGlowBottom.draw(canvas)) {
                needsInvalidate = true;
            }
            canvas.restoreToCount(restoreCount);
        }
        if (needsInvalidate) {
            invalidate();
        }
    }
    if (mFastScroller != null) {
        final int scrollY = getScrollY();
        if (scrollY != 0) {
            // Pin to the top/bottom during overscroll
            int restoreCount = canvas.save();
            canvas.translate(0, (float) scrollY);
            mFastScroller.draw(canvas);
            canvas.restoreToCount(restoreCount);
        } else {
            mFastScroller.draw(canvas);
        }
    }
}

---

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

@Override
protected void dispatchDraw(Canvas canvas) {
    int saveCount = 0;
    final boolean clipToPadding = mClipToPadding;
    if (clipToPadding) {
        saveCount = canvas.save();// www.j a  va2s. c  o  m
        final int scrollX = getScrollX();
        final int scrollY = getScrollY();
        final int paddingLeft = getPaddingLeft();
        final int paddingTop = getPaddingTop();
        final int paddingRight = getPaddingRight();
        final int paddingBottom = getPaddingBottom();
        final int left = getLeft();
        final int top = getTop();
        final int right = getRight();
        final int bottom = getBottom();
        canvas.clipRect(scrollX + paddingLeft, scrollY + paddingTop, scrollX + right - left - paddingRight,
                scrollY + bottom - top - paddingBottom);
        setClipToPadding(false);
    }

    final boolean drawSelectorOnTop = mDrawSelectorOnTop;
    if (!drawSelectorOnTop) {
        drawSelector(canvas);
    }

    super.dispatchDraw(canvas);

    if (drawSelectorOnTop) {
        drawSelector(canvas);
    }

    if (clipToPadding) {
        canvas.restoreToCount(saveCount);
        setClipToPadding(true);
    }
}

---

From source file:com.artifex.mupdflib.TwoWayView.java

private boolean drawStartEdge(Canvas canvas) {
    if (mStartEdge.isFinished()) {
        return false;
    }/*ww w .j  av a 2s  .  c  om*/

    if (mIsVertical) {
        return mStartEdge.draw(canvas);
    }

    final int restoreCount = canvas.save();
    final int height = getHeight();

    canvas.translate(0, height);
    canvas.rotate(270);

    final boolean needsInvalidate = mStartEdge.draw(canvas);
    canvas.restoreToCount(restoreCount);
    return needsInvalidate;
}

---

From source file:com.artifex.mupdflib.TwoWayView.java

private boolean drawEndEdge(Canvas canvas) {
    if (mEndEdge.isFinished()) {
        return false;
    }/* www.  j ava  2 s. c  o  m*/

    final int restoreCount = canvas.save();
    final int width = getWidth();
    final int height = getHeight();

    if (mIsVertical) {
        canvas.translate(-width, height);
        canvas.rotate(180, width, 0);
    } else {
        canvas.translate(width, 0);
        canvas.rotate(90);
    }

    final boolean needsInvalidate = mEndEdge.draw(canvas);
    canvas.restoreToCount(restoreCount);
    return needsInvalidate;
}

---

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

@Override
public void draw(Canvas c) {
    super.draw(c);

    final int count = mItemDecorations.size();
    for (int i = 0; i < count; i++) {
        mItemDecorations.get(i).onDrawOver(c, this, mState);
    }//from   w  w  w .j a  v a2s. co m
    // TODO If padding is not 0 and chilChildrenToPadding is false, to draw glows properly, we
    // need find children closest to edges. Not sure if it is worth the effort.
    boolean needsInvalidate = false;
    if (mLeftGlow != null && !mLeftGlow.isFinished()) {
        final int restore = c.save();
        final int padding = mClipToPadding ? getPaddingBottom() : 0;
        c.rotate(270);
        c.translate(-getHeight() + padding, 0);
        needsInvalidate = mLeftGlow != null && mLeftGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mTopGlow != null && !mTopGlow.isFinished()) {
        final int restore = c.save();
        if (mClipToPadding) {
            c.translate(getPaddingLeft(), getPaddingTop());
        }
        needsInvalidate |= mTopGlow != null && mTopGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mRightGlow != null && !mRightGlow.isFinished()) {
        final int restore = c.save();
        final int width = getWidth();
        final int padding = mClipToPadding ? getPaddingTop() : 0;
        c.rotate(90);
        c.translate(-padding, -width);
        needsInvalidate |= mRightGlow != null && mRightGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mBottomGlow != null && !mBottomGlow.isFinished()) {
        final int restore = c.save();
        c.rotate(180);
        if (mClipToPadding) {
            c.translate(-getWidth() + getPaddingRight(), -getHeight() + getPaddingBottom());
        } else {
            c.translate(-getWidth(), -getHeight());
        }
        needsInvalidate |= mBottomGlow != null && mBottomGlow.draw(c);
        c.restoreToCount(restore);
    }

    // If some views are animating, ItemDecorators are likely to move/change with them.
    // Invalidate RecyclerViewEx to re-draw decorators. This is still efficient because children's
    // display lists are not invalidated.
    if (!needsInvalidate && mItemAnimator != null && mItemDecorations.size() > 0 && mItemAnimator.isRunning()) {
        needsInvalidate = true;
    }

    if (needsInvalidate) {
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

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

@Override
public void draw(Canvas c) {
    super.draw(c);

    final int count = mItemDecorations.size();
    for (int i = 0; i < count; i++) {
        mItemDecorations.get(i).onDrawOver(c, this, mState);
    }/*from  w ww. jav  a  2 s .  c  o  m*/
    // TODO If padding is not 0 and chilChildrenToPadding is false, to draw glows properly, we
    // need find children closest to edges. Not sure if it is worth the effort.
    boolean needsInvalidate = false;
    if (mLeftGlow != null && !mLeftGlow.isFinished()) {
        final int restore = c.save();
        final int padding = mClipToPadding ? getPaddingBottom() : 0;
        c.rotate(270);
        c.translate(-getHeight() + padding, 0);
        needsInvalidate = mLeftGlow != null && mLeftGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mTopGlow != null && !mTopGlow.isFinished()) {
        final int restore = c.save();
        if (mClipToPadding) {
            c.translate(getPaddingLeft(), getPaddingTop());
        }
        needsInvalidate |= mTopGlow != null && mTopGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mRightGlow != null && !mRightGlow.isFinished()) {
        final int restore = c.save();
        final int width = getWidth();
        final int padding = mClipToPadding ? getPaddingTop() : 0;
        c.rotate(90);
        c.translate(-padding, -width);
        needsInvalidate |= mRightGlow != null && mRightGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mBottomGlow != null && !mBottomGlow.isFinished()) {
        final int restore = c.save();
        c.rotate(180);
        if (mClipToPadding) {
            c.translate(-getWidth() + getPaddingRight(), -getHeight() + getPaddingBottom());
        } else {
            c.translate(-getWidth(), -getHeight());
        }
        needsInvalidate |= mBottomGlow != null && mBottomGlow.draw(c);
        c.restoreToCount(restore);
    }

    // If some views are animating, ItemDecorators are likely to move/change with them.
    // Invalidate RecyclerView to re-draw decorators. This is still efficient because children's
    // display lists are not invalidated.
    if (!needsInvalidate && mItemAnimator != null && mItemDecorations.size() > 0 && mItemAnimator.isRunning()) {
        needsInvalidate = true;
    }

    if (needsInvalidate) {
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

From source file:com.b44t.messenger.support.widget.RecyclerView.java

@Override
public void draw(Canvas c) {
    super.draw(c);

    final int count = mItemDecorations.size();
    for (int i = 0; i < count; i++) {
        mItemDecorations.get(i).onDrawOver(c, this, mState);
    }//from  w ww  .ja va 2 s.c o m
    // TODO If padding is not 0 and chilChildrenToPadding is false, to draw glows properly, we
    // need find children closest to edges. Not sure if it is worth the effort.
    boolean needsInvalidate = false;
    if (mLeftGlow != null && !mLeftGlow.isFinished()) {
        final int restore = c.save();
        final int padding = mClipToPadding ? getPaddingBottom() : 0;
        c.rotate(270);
        c.translate(-getHeight() + padding, 0);
        needsInvalidate = mLeftGlow != null && mLeftGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mTopGlow != null && !mTopGlow.isFinished()) {
        final int restore = c.save();
        if (mClipToPadding) {
            c.translate(getPaddingLeft(), getPaddingTop());
        }
        c.translate(0, topGlowOffset);
        needsInvalidate |= mTopGlow != null && mTopGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mRightGlow != null && !mRightGlow.isFinished()) {
        final int restore = c.save();
        final int width = getWidth();
        final int padding = mClipToPadding ? getPaddingTop() : 0;
        c.rotate(90);
        c.translate(-padding, -width);
        needsInvalidate |= mRightGlow != null && mRightGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mBottomGlow != null && !mBottomGlow.isFinished()) {
        final int restore = c.save();
        c.rotate(180);
        if (mClipToPadding) {
            c.translate(-getWidth() + getPaddingRight(), -getHeight() + getPaddingBottom());
        } else {
            c.translate(-getWidth(), -getHeight());
        }
        needsInvalidate |= mBottomGlow != null && mBottomGlow.draw(c);
        c.restoreToCount(restore);
    }

    // If some views are animating, ItemDecorators are likely to move/change with them.
    // Invalidate RecyclerView to re-draw decorators. This is still efficient because children's
    // display lists are not invalidated.
    if (!needsInvalidate && mItemAnimator != null && mItemDecorations.size() > 0 && mItemAnimator.isRunning()) {
        needsInvalidate = true;
    }

    if (needsInvalidate) {
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

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

@Override
public void draw(Canvas c) {
    super.draw(c);
    //  //from   w  ww.  ja v  a 2s. c  o m
    final int count = mItemDecorations.size();
    for (int i = 0; i < count; i++) {
        mItemDecorations.get(i).onDrawOver(c, this, mState);
    }
    // TODO If padding is not 0 and chilChildrenToPadding is false, to draw glows properly, we
    // need find children closest to edges. Not sure if it is worth the effort.
    boolean needsInvalidate = false;
    // ?   
    if (mLeftGlow != null && !mLeftGlow.isFinished()) {
        final int restore = c.save();
        final int padding = mClipToPadding ? getPaddingBottom() : 0;
        c.rotate(270);
        c.translate(-getHeight() + padding, 0);
        needsInvalidate = mLeftGlow != null && mLeftGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mTopGlow != null && !mTopGlow.isFinished()) {
        final int restore = c.save();
        if (mClipToPadding) {
            c.translate(getPaddingLeft(), getPaddingTop());
        }
        needsInvalidate |= mTopGlow != null && mTopGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mRightGlow != null && !mRightGlow.isFinished()) {
        final int restore = c.save();
        final int width = getWidth();
        final int padding = mClipToPadding ? getPaddingTop() : 0;
        c.rotate(90);
        c.translate(-padding, -width);
        needsInvalidate |= mRightGlow != null && mRightGlow.draw(c);
        c.restoreToCount(restore);
    }
    if (mBottomGlow != null && !mBottomGlow.isFinished()) {
        final int restore = c.save();
        c.rotate(180);
        if (mClipToPadding) {
            c.translate(-getWidth() + getPaddingRight(), -getHeight() + getPaddingBottom());
        } else {
            c.translate(-getWidth(), -getHeight());
        }
        needsInvalidate |= mBottomGlow != null && mBottomGlow.draw(c);
        c.restoreToCount(restore);
    }

    // If some views are animating, ItemDecorators are likely to move/change with them.
    // Invalidate RecyclerView to re-draw decorators. This is still efficient because children's
    // display lists are not invalidated.
    //  VIew , Item   ??, ??  ?
    if (!needsInvalidate && mItemAnimator != null && mItemDecorations.size() > 0 && mItemAnimator.isRunning()) {
        needsInvalidate = true;
    }

    if (needsInvalidate) {
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

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