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.zyk.drawerlayout.widget.DrawerLayout.java

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
    final int height = getHeight();
    final boolean drawingContent = isContentView(child);
    int clipLeft = 0, clipRight = getWidth();

    final int restoreCount = canvas.save();
    if (drawingContent) {
        final int childCount = getChildCount();
        for (int i = 0; i < childCount; i++) {
            final View v = getChildAt(i);
            if (v == child || v.getVisibility() != VISIBLE || !hasOpaqueBackground(v) || !isDrawerView(v)
                    || v.getHeight() < height) {
                continue;
            }/*from   w  w w  .  j a  va 2  s. c  o m*/

            if (checkDrawerViewAbsoluteGravity(v, Gravity.LEFT)) {
                final int vright = v.getRight();
                if (vright > clipLeft)
                    clipLeft = vright;
            } else {
                final int vleft = v.getLeft();
                if (vleft < clipRight)
                    clipRight = vleft;
            }
        }
        canvas.clipRect(clipLeft, 0, clipRight, getHeight());
    }
    final boolean result = super.drawChild(canvas, child, drawingTime);
    canvas.restoreToCount(restoreCount);

    if (mScrimOpacity > 0 && drawingContent) {
        final int baseAlpha = (mScrimColor & 0xff000000) >>> 24;
        final int imag = (int) (baseAlpha * mScrimOpacity);
        final int color = imag << 24 | (mScrimColor & 0xffffff);
        mScrimPaint.setColor(color);
        canvas.drawRect(clipLeft, 0, clipRight, getHeight(), mScrimPaint);
    } else if (mShadowLeftResolved != null && checkDrawerViewAbsoluteGravity(child, Gravity.LEFT)) {
        final int shadowWidth = mShadowLeftResolved.getIntrinsicWidth();
        final int childRight = child.getRight();
        final int drawerPeekDistance = mLeftDragger.getEdgeSize();
        final float alpha = Math.max(0, Math.min((float) childRight / drawerPeekDistance, 1.f));
        mShadowLeftResolved.setBounds(childRight, child.getTop(), childRight + shadowWidth, child.getBottom());
        mShadowLeftResolved.setAlpha((int) (0xff * alpha));
        mShadowLeftResolved.draw(canvas);
    } else if (mShadowTopResolved != null && checkDrawerViewAbsoluteGravity(child, Gravity.TOP)) {
        final int shadowHeight = mShadowTopResolved.getIntrinsicHeight();
        final int childBottom = child.getBottom();
        final int drawerPeekDistance = mTopDragger.getEdgeSize();
        final float alpha = Math.max(0, Math.min((float) childBottom / drawerPeekDistance, 1.f));
        mShadowTopResolved.setBounds(child.getLeft(), childBottom, child.getRight(),
                childBottom + shadowHeight);
        mShadowTopResolved.setAlpha((int) (0xff * alpha));
        mShadowTopResolved.draw(canvas);
    } else if (mShadowRightResolved != null && checkDrawerViewAbsoluteGravity(child, Gravity.RIGHT)) {
        final int shadowWidth = mShadowRightResolved.getIntrinsicWidth();
        final int childLeft = child.getLeft();
        final int showing = getWidth() - childLeft;
        final int drawerPeekDistance = mRightDragger.getEdgeSize();
        final float alpha = Math.max(0, Math.min((float) showing / drawerPeekDistance, 1.f));
        mShadowRightResolved.setBounds(childLeft - shadowWidth, child.getTop(), childLeft, child.getBottom());
        mShadowRightResolved.setAlpha((int) (0xff * alpha));
        mShadowRightResolved.draw(canvas);
    } else if (mShadowBottomResolved != null && checkDrawerViewAbsoluteGravity(child, Gravity.BOTTOM)) {
        final int shadowHeight = mShadowBottomResolved.getIntrinsicHeight();
        final int childTop = child.getTop();
        final int showing = getWidth() - childTop;
        final int drawerPeekDistance = mBottomDragger.getEdgeSize();
        final float alpha = Math.max(0, Math.min((float) showing / drawerPeekDistance, 1.f));
        mShadowRightResolved.setBounds(child.getLeft(), childTop - shadowHeight, child.getRight(), childTop);
        mShadowRightResolved.setAlpha((int) (0xff * alpha));
        mShadowRightResolved.draw(canvas);
    }
    return result;
}

---

From source file:gl.android.widget.viewpager.ViewPagerEx.java

@Override
public void draw(Canvas canvas) {
    try {/*from w  ww  .ja  v  a2s .  c om*/
        super.draw(canvas);
    } catch (Exception e) {
        //         System.out.println(e.getMessage());
        //FIXME the nullpoint Exception at super.Draw(canvas) in viewPager;
        if (mFirstLayout) {
            Log.e("ViewPagerEx", "line 2305,.draw(Canvas canvas) NullPointException");
        }

    }
    boolean needsInvalidate = false;
    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        if (!mLeftEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();
            final int width = getWidth();

            canvas.rotate(270);
            canvas.translate(-height + getPaddingTop(), mFirstOffset * width);
            mLeftEdge.setSize(height, width);
            needsInvalidate |= mLeftEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
        if (!mRightEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = getWidth();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();

            canvas.rotate(90);
            canvas.translate(-getPaddingTop(), -(mLastOffset + 1) * width);
            mRightEdge.setSize(height, width);
            needsInvalidate |= mRightEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

From source file:com.telerik.examples.primitives.ExampleViewPagerBase.java

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    boolean needsInvalidate = false;

    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        if (!mLeftEdge.isFinished()) {
            if (this.orientation == LinearLayout.HORIZONTAL) {
                final int restoreCount = canvas.save();
                final int height = getHeight() - getPaddingTop() - getPaddingBottom();
                final int width = getWidth();

                canvas.rotate(270);/* w  w  w  .j ava 2  s.  co m*/
                canvas.translate(-height + getPaddingTop(), mFirstOffset * width);
                mLeftEdge.setSize(height, width);
                needsInvalidate |= mLeftEdge.draw(canvas);
                canvas.restoreToCount(restoreCount);
            } else {
                final int restoreCount = canvas.save();
                final int height = getHeight();
                final int width = getWidth() - getPaddingLeft() - getPaddingRight();
                canvas.translate(getPaddingLeft(), mFirstOffset * height);
                mLeftEdge.setSize(width, height);
                needsInvalidate |= mLeftEdge.draw(canvas);
                canvas.restoreToCount(restoreCount);
            }
        }
        if (!mRightEdge.isFinished()) {
            if (this.orientation == LinearLayout.HORIZONTAL) {
                final int restoreCount = canvas.save();
                final int width = getWidth();
                final int height = getHeight() - getPaddingTop() - getPaddingBottom();

                canvas.rotate(90);
                canvas.translate(-getPaddingTop(), -(mLastOffset + 1) * width);
                mRightEdge.setSize(height, width);
                needsInvalidate |= mRightEdge.draw(canvas);
                canvas.restoreToCount(restoreCount);
            } else {
                final int restoreCount = canvas.save();
                final int width = getWidth() - getPaddingLeft() - getPaddingRight();
                final int height = getHeight();

                canvas.rotate(180);
                canvas.translate(-getPaddingLeft() - width, -height);
                mRightEdge.setSize(width, height);
                needsInvalidate |= mRightEdge.draw(canvas);
                canvas.restoreToCount(restoreCount);
            }
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

From source file:android.support.design.widget.CoordinatorLayout.java

@Override
protected boolean drawChild(Canvas canvas, View child, long drawingTime) {
    final LayoutParams lp = (LayoutParams) child.getLayoutParams();
    if (lp.mBehavior != null) {
        final float scrimAlpha = lp.mBehavior.getScrimOpacity(this, child);
        if (scrimAlpha > 0f) {
            if (mScrimPaint == null) {
                mScrimPaint = new Paint();
            }//from www.j a  v a 2 s.c o m
            mScrimPaint.setColor(lp.mBehavior.getScrimColor(this, child));
            mScrimPaint.setAlpha(MathUtils.constrain(Math.round(255 * scrimAlpha), 0, 255));

            final int saved = canvas.save();
            if (child.isOpaque()) {
                // If the child is opaque, there is no need to draw behind it so we'll inverse
                // clip the canvas
                canvas.clipRect(child.getLeft(), child.getTop(), child.getRight(), child.getBottom(),
                        Region.Op.DIFFERENCE);
            }
            // Now draw the rectangle for the scrim
            canvas.drawRect(getPaddingLeft(), getPaddingTop(), getWidth() - getPaddingRight(),
                    getHeight() - getPaddingBottom(), mScrimPaint);
            canvas.restoreToCount(saved);
        }
    }
    return super.drawChild(canvas, child, drawingTime);
}

---

From source file:dev.dworks.libs.widget.ViewPager.java

private void drawHorizontally(Canvas canvas) {
    boolean needsInvalidate = false;

    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        if (!mLeftEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();
            final int width = getWidth();

            canvas.rotate(270);/*from ww  w . j a va2s  .co m*/
            canvas.translate(-height + getPaddingTop(), mFirstOffset * width);
            mLeftEdge.setSize(height, width);
            needsInvalidate |= mLeftEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
        if (!mRightEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = getWidth();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();

            canvas.rotate(90);
            canvas.translate(-getPaddingTop(), -(mLastOffset + 1) * width);
            mRightEdge.setSize(height, width);
            needsInvalidate |= mRightEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

From source file:javalibrary.android.ui.VerticalViewPager.java

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    boolean needsInvalidate = false;
    if (DEBUG)//from w  ww .  j  a  va 2s  .c  o  m
        Log.v(TAG, "draw");
    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        /*if (!mLeftEdge.isFinished()) {
        final int restoreCount = canvas.save();
        final int height = getHeight() - getPaddingTop() - getPaddingBottom();
                
        canvas.rotate(270);
        canvas.translate(-height + getPaddingTop(), 0);
        mLeftEdge.setSize(height, getWidth());
        needsInvalidate |= mLeftEdge.draw(canvas);
        canvas.restoreToCount(restoreCount);
        }
        if (!mRightEdge.isFinished()) {
        final int restoreCount = canvas.save();
        final int width = getWidth();
        final int height = getHeight() - getPaddingTop() - getPaddingBottom();
        final int itemCount = mAdapter != null ? mAdapter.getCount() : 1;
                
        canvas.rotate(90);
        canvas.translate(-getPaddingTop(),
                -itemCount * (width + mPageMargin) + mPageMargin);
        mRightEdge.setSize(height, width);
        needsInvalidate |= mRightEdge.draw(canvas);
        canvas.restoreToCount(restoreCount);
        }*/
        if (!mTopEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();

            canvas.rotate(270);
            canvas.translate(-height + getPaddingTop(), 0);
            mTopEdge.setSize(height, getWidth());
            needsInvalidate |= mTopEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
        if (!mBottomEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = getWidth();
            final int height = getHeight() - getPaddingTop() - getPaddingBottom();
            final int itemCount = mAdapter != null ? mAdapter.getCount() : 1;

            canvas.rotate(90);
            canvas.translate(-getPaddingTop(), -itemCount * (width + mPageMargin) + mPageMargin);
            mBottomEdge.setSize(height, width);
            needsInvalidate |= mBottomEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
        mTopEdge.finish();
        mBottomEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        invalidate();
    }
}

---

From source file:android.improving.utils.views.cardsview.OrientedViewPager.java

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    boolean needsInvalidate = false;

    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        if (mOrientation == Orientation.VERTICAL) {
            if (!mTopLeftEdge.isFinished()) {
                final int restoreCount = canvas.save();
                final int height = getHeight();
                final int width = getWidth() - getPaddingLeft() - getPaddingRight();

                canvas.translate(getPaddingLeft(), mFirstOffset * height);
                mTopLeftEdge.setSize(width, height);
                needsInvalidate |= mTopLeftEdge.draw(canvas);
                canvas.restoreToCount(restoreCount);
            }//from   w ww.  jav  a 2  s.co m
            if (!mRightBottomEdge.isFinished()) {
                final int restoreCount = canvas.save();
                final int height = getHeight();
                final int width = getWidth() - getPaddingLeft() - getPaddingRight();

                canvas.rotate(180);
                canvas.translate(-width - getPaddingLeft(), -(mLastOffset + 1) * height);
                mRightBottomEdge.setSize(width, height);
                needsInvalidate |= mRightBottomEdge.draw(canvas);
                canvas.restoreToCount(restoreCount);
            }
        } else {
            if (!mTopLeftEdge.isFinished()) {
                final int restoreCount = canvas.save();
                final int height = getHeight() - getPaddingTop() - getPaddingBottom();
                final int width = getWidth();

                canvas.rotate(270);
                canvas.translate(-height + getPaddingTop(), mFirstOffset * width);
                mTopLeftEdge.setSize(height, width);
                needsInvalidate |= mTopLeftEdge.draw(canvas);
                canvas.restoreToCount(restoreCount);
            }
            if (!mRightBottomEdge.isFinished()) {
                final int restoreCount = canvas.save();
                final int width = getWidth();
                final int height = getHeight() - getPaddingTop() - getPaddingBottom();

                canvas.rotate(90);
                canvas.translate(-getPaddingTop(), -(mLastOffset + 1) * width);
                mRightBottomEdge.setSize(height, width);
                needsInvalidate |= mRightBottomEdge.draw(canvas);
                canvas.restoreToCount(restoreCount);
            }
        }
    } else {
        mTopLeftEdge.finish();
        mRightBottomEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

From source file:app.umitems.greenclock.widget.sgv.StaggeredGridView.java

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

    if (mTopEdge != null) {
        boolean needsInvalidate = false;
        if (!mTopEdge.isFinished()) {
            final int restoreCount = canvas.save();
            canvas.translate(0, 0);/*from ww  w  . j  a va  2 s . c  o  m*/
            mTopEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
            needsInvalidate = true;
        }
        if (!mBottomEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = getWidth();
            canvas.translate(-width, getHeight());
            canvas.rotate(180, width, 0);
            mBottomEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
            needsInvalidate = true;
        }

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

---

From source file:com.tjych.swip.vertical.DirectionalViewPager.java

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    boolean needsInvalidate = false;

    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        if (!mStartEdge.isFinished()) {
            final int restoreCount = canvas.save();

            if (mOrientation == HORIZONTAL) {
                final int height = getHeight() - getPaddingTop() - getPaddingBottom();
                final int width = getWidth();
                canvas.rotate(270);//w  ww  .j  a  v a  2s .  co m
                canvas.translate(-height + getPaddingTop(), mFirstOffset * width);
                mStartEdge.setSize(height, width);
            } else {
                final int height = getHeight();
                final int width = getWidth() - getPaddingLeft() - getPaddingRight();
                canvas.translate(getPaddingLeft(), mFirstOffset * height);
                mStartEdge.setSize(width, height);
            }

            needsInvalidate |= mStartEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
        if (!mEndEdge.isFinished()) {
            final int restoreCount = canvas.save();

            if (mOrientation == HORIZONTAL) {
                final int width = getWidth();
                final int height = getHeight() - getPaddingTop() - getPaddingBottom();

                canvas.rotate(90);
                canvas.translate(-getPaddingTop(), -(mLastOffset + 1) * width);
                mEndEdge.setSize(height, width);
            } else {
                final int width = getWidth() - getPaddingLeft() - getPaddingRight();
                final int height = getHeight();

                if (mEndEdgeMatrix == null) {
                    mEndEdgeMatrix = new Matrix();
                    mEndEdgeMatrix.setScale(1f, -1f);
                    mEndEdgeMatrix.postTranslate(0f, (mLastOffset + 1) * height);
                }

                canvas.concat(mEndEdgeMatrix);
                mEndEdge.setSize(width, height);
            }

            needsInvalidate |= mEndEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
    } else {
        mStartEdge.finish();
        mEndEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

From source file:cn.androidy.materialdesignsample.ryanharterviewpager.ViewPager.java

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    boolean needsInvalidate = false;

    final int overScrollMode = ViewCompat.getOverScrollMode(this);
    if (overScrollMode == ViewCompat.OVER_SCROLL_ALWAYS
            || (overScrollMode == ViewCompat.OVER_SCROLL_IF_CONTENT_SCROLLS && mAdapter != null
                    && mAdapter.getCount() > 1)) {
        if (!mLeftEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = isOrientationHorizontal() ? getHeight() - getPaddingTop() - getPaddingBottom()
                    : getWidth() - getPaddingLeft() - getPaddingRight();
            final int height = isOrientationHorizontal() ? getWidth() - getPaddingLeft() - getPaddingRight()
                    : getHeight() - getPaddingTop() - getPaddingBottom();

            if (isOrientationHorizontal()) {
                canvas.rotate(270);//from   w w w  .  j  a  v  a 2  s. c  o  m
                canvas.translate(-width + getPaddingTop(), mFirstOffset * height);
            }
            mLeftEdge.setSize(width, height);
            needsInvalidate |= mLeftEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
        if (!mRightEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = isOrientationHorizontal() ? getHeight() - getPaddingTop() - getPaddingBottom()
                    : getWidth() - getPaddingLeft() - getPaddingRight();
            final int height = isOrientationHorizontal() ? getWidth() - getPaddingLeft() - getPaddingRight()
                    : getHeight() - getPaddingTop() - getPaddingBottom();

            if (isOrientationHorizontal()) {
                canvas.rotate(90);
                canvas.translate(-getPaddingTop(), -(mLastOffset + 1) * height);
            } else {
                canvas.rotate(180);
                canvas.translate(-width, -(mLastOffset + 1) * height);
            }
            mRightEdge.setSize(width, height);
            needsInvalidate |= mRightEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

    if (needsInvalidate) {
        // Keep animating
        ViewCompat.postInvalidateOnAnimation(this);
    }
}

---

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