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:net.simonvt.staggeredgridview.StaggeredGridView.java

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

    if (topEdge != null) {
        boolean needsInvalidate = false;
        if (!topEdge.isFinished()) {
            topEdge.draw(canvas);/*  ww  w  . j  av  a2s .co m*/
            needsInvalidate = true;
        }
        if (!bottomEdge.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = getWidth();
            canvas.translate(-width, getHeight());
            canvas.rotate(180, width, 0);
            bottomEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
            needsInvalidate = true;
        }

        if (needsInvalidate) {
            postInvalidateOnAnimation();
        }
    }

    if (!selectorRect.isEmpty()) {
        selector.setBounds(selectorRect);
        selector.draw(canvas);
    }
}

---

From source file:rikka.akashitoolkit.ui.widget.IconSwitchCompat.java

@Override
protected void onDraw(Canvas canvas) {
    super.onDraw(canvas);

    final Rect padding = mTempRect;
    final Drawable trackDrawable = mTrackDrawable;
    if (trackDrawable != null) {
        trackDrawable.getPadding(padding);
    } else {/*from  w  w w.j a va  2s.  co m*/
        padding.setEmpty();
    }

    final int switchTop = mSwitchTop;
    final int switchBottom = mSwitchBottom;
    final int switchInnerTop = switchTop + padding.top;
    final int switchInnerBottom = switchBottom - padding.bottom;

    final Drawable thumbDrawable = mThumbDrawable;
    if (trackDrawable != null) {
        if (mSplitTrack && thumbDrawable != null) {
            final Rect insets = DrawableUtils.getOpticalBounds(thumbDrawable);
            thumbDrawable.copyBounds(padding);
            padding.left += insets.left;
            padding.right -= insets.right;

            final int saveCount = canvas.save();
            canvas.clipRect(padding, Region.Op.DIFFERENCE);
            trackDrawable.draw(canvas);
            canvas.restoreToCount(saveCount);
        } else {
            trackDrawable.draw(canvas);
        }
    }

    final int saveCount = canvas.save();

    if (thumbDrawable != null) {
        thumbDrawable.draw(canvas);
    }

    final Drawable iconDrawable = mIconDrawable;
    if (iconDrawable != null) {
        if (mSplitTrack) {
            final Rect insets = DrawableUtils.getOpticalBounds(iconDrawable);
            iconDrawable.copyBounds(padding);
            padding.left += insets.left;
            padding.right -= insets.right;

            //final int saveCount = canvas.save();
            canvas.clipRect(padding, Region.Op.DIFFERENCE);
            iconDrawable.draw(canvas);
            canvas.restoreToCount(saveCount);
        } else {
            iconDrawable.draw(canvas);
        }
    }

    final Layout switchText = getTargetCheckedState() ? mOnLayout : mOffLayout;
    if (switchText != null) {
        final int drawableState[] = getDrawableState();
        if (mTextColors != null) {
            mTextPaint.setColor(mTextColors.getColorForState(drawableState, 0));
        }
        mTextPaint.drawableState = drawableState;

        final int cX;
        if (thumbDrawable != null) {
            final Rect bounds = thumbDrawable.getBounds();
            cX = bounds.left + bounds.right;
        } else {
            cX = getWidth();
        }

        final int left = cX / 2 - switchText.getWidth() / 2;
        final int top = (switchInnerTop + switchInnerBottom) / 2 - switchText.getHeight() / 2;
        canvas.translate(left, top);
        switchText.draw(canvas);
    }

    canvas.restoreToCount(saveCount);
}

---

From source file:com.marshalchen.common.uimodule.freeflow.core.FreeFlowContainer.java

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

    boolean needsInvalidate = false;

    final int height = getMeasuredHeight() - getPaddingTop() - getPaddingBottom();
    final int width = getMeasuredWidth();

    if (!mLeftEdge.isFinished()) {
        final int restoreCount = canvas.save();

        canvas.rotate(270);/*from w  w w  . jav a2  s  . c  o  m*/
        canvas.translate(-height + getPaddingTop(), 0);// width);
        mLeftEdge.setSize(height, width);

        needsInvalidate = mLeftEdge.draw(canvas);
        canvas.restoreToCount(restoreCount);
    }

    if (!mTopEdge.isFinished()) {
        final int restoreCount = canvas.save();

        mTopEdge.setSize(width, height);

        needsInvalidate = mTopEdge.draw(canvas);
        canvas.restoreToCount(restoreCount);
    }

    if (!mRightEdge.isFinished()) {
        final int restoreCount = canvas.save();

        canvas.rotate(90);
        canvas.translate(0, -width);// width);
        mRightEdge.setSize(height, width);

        needsInvalidate = mRightEdge.draw(canvas);
        canvas.restoreToCount(restoreCount);
    }

    if (!mBottomEdge.isFinished()) {
        final int restoreCount = canvas.save();

        canvas.rotate(180);
        canvas.translate(-width + getPaddingTop(), -height);

        mBottomEdge.setSize(width, height);

        needsInvalidate = mBottomEdge.draw(canvas);
        canvas.restoreToCount(restoreCount);
    }

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

---

From source file:com.apptentive.android.sdk.view.ApptentiveNestedScrollView.java

@Override
public void draw(Canvas canvas) {
    super.draw(canvas);
    if (mEdgeGlowTop != null) {
        final int scrollY = getScrollY();
        if (!mEdgeGlowTop.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = getWidth() - getPaddingLeft() - getPaddingRight();

            canvas.translate(getPaddingLeft(), Math.min(0, scrollY));
            mEdgeGlowTop.setSize(width, getHeight());
            if (mEdgeGlowTop.draw(canvas)) {
                ViewCompat.postInvalidateOnAnimation(this);
            }/*  ww w .j av a  2  s.com*/
            canvas.restoreToCount(restoreCount);
        }
        if (!mEdgeGlowBottom.isFinished()) {
            final int restoreCount = canvas.save();
            final int width = getWidth() - getPaddingLeft() - getPaddingRight();
            final int height = getHeight();

            canvas.translate(-width + getPaddingLeft(), Math.max(getScrollRange(), scrollY) + height);
            canvas.rotate(180, width, 0);
            mEdgeGlowBottom.setSize(width, height);
            if (mEdgeGlowBottom.draw(canvas)) {
                ViewCompat.postInvalidateOnAnimation(this);
            }
            canvas.restoreToCount(restoreCount);
        }
    }
}

---

From source file:com.jzh.stuapp.view.MyViewPager.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 height = getHeight() - getPaddingTop() - getPaddingBottom();

            canvas.rotate(270);//from w w  w .j  ava  2s  .c  o m
            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);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

    if (needsInvalidate) {
        invalidate();
    }
}

---

From source file:com.yimeng.babymom.view.LazyViewPager.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 height = getHeight() - getPaddingTop() - getPaddingBottom();

            canvas.rotate(270);/*from   w  w  w. j  a  va2  s . co  m*/
            canvas.translate(-height + getPaddingTop(), 0);
            mLeftEdge.setSize(getWidth(), height);
            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(width, height);
            needsInvalidate |= mRightEdge.draw(canvas);
            canvas.restoreToCount(restoreCount);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

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

---

From source file:com.example.nwilde.myfirstapp.SimpleListDividerDecorator.java

@Override
public void onDrawOver(Canvas c, RecyclerView parent, RecyclerView.State state) {
    final int childCount = parent.getChildCount();
    final float yPositionThreshold = (mOverlap) ? 1.0f : (mDividerHeight + 1.0f); // [px]
    final float zPositionThreshold = 1.0f; // [px]

    if (childCount == 0) {
        return;//from   w w w  .  java2s  .  c  o  m
    }

    int savedCount = c.save(Canvas.CLIP_SAVE_FLAG);

    c.clipRect(parent.getLeft() + parent.getPaddingLeft(), parent.getTop() + parent.getPaddingTop(),
            parent.getRight() - parent.getPaddingRight(), parent.getBottom() + parent.getPaddingBottom());

    for (int i = 0; i < childCount - 1; i++) {
        final View child = parent.getChildAt(i);
        final View nextChild = parent.getChildAt(i + 1);

        if ((child.getVisibility() != View.VISIBLE) || (nextChild.getVisibility() != View.VISIBLE)) {
            continue;
        }

        // check if the next item is placed at the bottom
        final float childBottom = child.getBottom() + ViewCompat.getTranslationY(child);
        final float nextChildTop = nextChild.getTop() + ViewCompat.getTranslationY(nextChild);

        if (!(Math.abs(nextChildTop - childBottom) < yPositionThreshold)) {
            continue;
        }

        // check if the next item is placed on the same plane
        final float childZ = ViewCompat.getTranslationZ(child) + ViewCompat.getElevation(child);
        final float nextChildZ = ViewCompat.getTranslationZ(nextChild) + ViewCompat.getElevation(nextChild);

        if (!(Math.abs(nextChildZ - childZ) < zPositionThreshold)) {
            continue;
        }

        final float childAlpha = ViewCompat.getAlpha(child);
        final float nextChildAlpha = ViewCompat.getAlpha(nextChild);

        final int tx = (int) (ViewCompat.getTranslationX(child) + 0.5f);
        final int ty = (int) (ViewCompat.getTranslationY(child) + 0.5f);
        final int left = child.getLeft();
        final int right = child.getRight();
        final int top = child.getBottom();
        final int bottom = top + mDividerHeight;

        mDividerDrawable.setAlpha((int) ((0.5f * 255) * (childAlpha + nextChildAlpha) + 0.5f));
        mDividerDrawable.setBounds(left + tx, top + ty, right + tx, bottom + ty);
        mDividerDrawable.draw(c);
    }

    c.restoreToCount(savedCount);
}

---

From source file:com.cnpeng.cnpeng_mydemosfrom2016_12.a_12_GetLocalFiles_VP_FM.CustomNoPreLoadViewPager.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 height = getHeight() - getPaddingTop() - getPaddingBottom();

            canvas.rotate(270);//w ww .  j a  va 2  s .c  om
            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);
        }
    } else {
        mLeftEdge.finish();
        mRightEdge.finish();
    }

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

---

From source file:com.guodong.sun.guodong.widget.ZoomImageView.java

@Override
protected void onDraw(Canvas canvas) {
    if (getDrawable() == null) {
        return; // couldn't resolve the URI
    }//from ww  w  .  ja va2 s .com

    if (mState == STATE_TRANSFORM_IN || mState == STATE_TRANSFORM_OUT) {
        if (mTransformStart) {
            initTransform();
        }
        if (mTransfrom == null) {
            super.onDraw(canvas);
            return;
        }

        if (mTransformStart) {
            if (mState == STATE_TRANSFORM_IN) {
                mTransfrom.initStartIn();
            } else {
                mTransfrom.initStartOut();
            }
        }

        if (mTransformStart) {
            Log.d("Dean", "mTransfrom.startScale:" + mTransfrom.startScale);
            Log.d("Dean", "mTransfrom.startScale:" + mTransfrom.endScale);
            Log.d("Dean", "mTransfrom.scale:" + mTransfrom.scale);
            Log.d("Dean", "mTransfrom.startRect:" + mTransfrom.startRect.toString());
            Log.d("Dean", "mTransfrom.endRect:" + mTransfrom.endRect.toString());
            Log.d("Dean", "mTransfrom.rect:" + mTransfrom.rect.toString());
        }

        mPaint.setAlpha(mBgAlpha);
        canvas.drawPaint(mPaint);

        int saveCount = canvas.getSaveCount();
        canvas.save();
        // ?Matrix
        getBmpMatrix();
        canvas.translate(mTransfrom.rect.left, mTransfrom.rect.top);
        canvas.clipRect(0, 0, mTransfrom.rect.width, mTransfrom.rect.height);
        canvas.concat(mSmoothMatrix);
        getDrawable().draw(canvas);
        canvas.restoreToCount(saveCount);
        if (mTransformStart) {
            mTransformStart = false;
            startTransform(mState);
        }
    } else {
        //Transform In???Activity??
        mPaint.setAlpha(255);
        canvas.drawPaint(mPaint);
        super.onDraw(canvas);
    }
}

---

From source file:com.hippo.widget.recyclerview.EasyRecyclerView.java

@Override
protected void dispatchDraw(@NonNull Canvas canvas) {
    boolean clipToPadding = mClipToPadding;
    int saveCount = 0;
    if (clipToPadding) {
        saveCount = canvas.save();//from  www  .java 2  s.  c o  m
        final int scrollX = getScrollX();
        final int scrollY = getScrollY();
        canvas.clipRect(scrollX + getPaddingLeft(), scrollY + getPaddingTop(),
                scrollX + getRight() - getLeft() - getPaddingRight(),
                scrollY + getBottom() - getTop() - getPaddingBottom());
    }

    // TODO disable selector drawable state change when need not to draw selector
    boolean drawSelector = mOnDrawSelectorListener == null || mSelectorPosition < 0
            || mSelectorPosition >= mAdapter.getItemCount()
            || mOnDrawSelectorListener.beforeDrawSelector(mSelectorPosition);
    final boolean drawSelectorOnTop = mDrawSelectorOnTop;

    if (drawSelector && !drawSelectorOnTop) {
        drawSelector(canvas);
    }

    super.dispatchDraw(canvas);

    if (drawSelector && drawSelectorOnTop) {
        drawSelector(canvas);
    }

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

---

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