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android.graphics.Region的实例源码

分类：Java实例代码作者：编程之家
项目：android-open-source-project-analysis    文件：PageView.java    
private void drawCurrentPageArea(Canvas canvas,Bitmap bitmap,Path path) {
    mPath0.reset();
    mPath0.moveto(mBezierStart1.x,mBezierStart1.y);
    mPath0.quadTo(mBezierControl1.x,mBezierControl1.y,mBezierEnd1.x,mBezierEnd1.y);
    mPath0.lineto(mTouch.x,mTouch.y);
    mPath0.lineto(mBezierEnd2.x,mBezierEnd2.y);
    mPath0.quadTo(mBezierControl2.x,mBezierControl2.y,mBezierStart2.x,mBezierStart2.y);
    mPath0.lineto(mCornerX,mCornerY);
    mPath0.close();

    canvas.save();
    canvas.clipPath(path,Region.Op.XOR);
    canvas.drawBitmap(bitmap,null);
    try {
        canvas.restore();
    } catch (Exception e) {

    }

}
项目：GitHub    文件：PageWidget.java    
@Override
protected void drawCurrentPageArea(Canvas canvas) {
    mPath0.reset();
    mPath0.moveto(mBezierStart1.x,mCornerY);
    mPath0.close();

    canvas.save();
    canvas.clipPath(mPath0,Region.Op.XOR);
    canvas.drawBitmap(mCurPageBitmap,null);
    try {
        canvas.restore();
    } catch (Exception e) {

    }
}
项目：RNLearn_Project1    文件：ARTGroupShadowNode.java    
public void draw(Canvas canvas,Paint paint,float opacity) {
  opacity *= mOpacity;
  if (opacity > MIN_OPACITY_FOR_DRAW) {
    saveAndSetupCanvas(canvas);

    if (mClipping != null) {
      canvas.clipRect(
        mClipping.left * mScale,mClipping.top * mScale,mClipping.right * mScale,mClipping.bottom * mScale,Region.Op.REPLACE);
    }

    for (int i = 0; i < getChildCount(); i++) {
      ARTVirtualNode child = (ARTVirtualNode) getChildAt(i);
      child.draw(canvas,paint,opacity);
      child.markUpdateSeen();
    }

    restoreCanvas(canvas);
  }
}
项目：GitHub    文件：OverlappedWidget.java    
@Override
protected void drawNextPageAreaAndShadow(Canvas canvas) {
    canvas.save();
    if (actiondownX > mScreenWidth >> 1) {
        canvas.clipPath(mPath0);
        canvas.drawBitmap(mNextPageBitmap,null);
    } else {
        canvas.clipPath(mPath0,Region.Op.XOR);
        canvas.drawBitmap(mNextPageBitmap,null);
    }
    try {
        canvas.restore();
    } catch (Exception e) {

    }
}
项目：GitHub    文件：CardItemView.java    
public CardItemView(Context context,AttributeSet attrs,int defStyleAttr) {
    super(context,attrs,defStyleAttr);
    mPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mPaint.setStyle(Paint.Style.FILL);
    TypedArray ta = context.obtainStyledAttributes(attrs,R.styleable.Card,defStyleAttr,0);
    mSize = ta.getDimensionPixelSize(R.styleable.Card_size,10);
    mPaint.setColor(ta.getColor(R.styleable.Card_bgColor,0));
    ta.recycle();

    mRegion = new Region();
    mDrawPath = new Path();

    mDrawPath.moveto(0,mSize / 2);
    mDrawPath.lineto(mSize / 2,0);
    mDrawPath.lineto(mSize,mSize);
    mDrawPath.close();
}
项目：LaunchEnr    文件：DragLayer.java    
@Override
protected void dispatchDraw(Canvas canvas) {
    // Draw the background below children.
    if (mBackgroundAlpha > 0.0f) {
        // Update the scroll position first to ensure scrim cutout is in the right place.
        mLauncher.getWorkspace().computeScrollWithoutInvalidation();

        int alpha = (int) (mBackgroundAlpha * 255);
        CellLayout currCellLayout = mLauncher.getWorkspace().getCurrentDragOverlappingLayout();
        canvas.save();
        if (currCellLayout != null && currCellLayout != mLauncher.getHotseat().getLayout()) {
            // Cut a hole in the darkening scrim on the page that should be highlighted,if any.
            getDescendantRectRelativetoSelf(currCellLayout,mHighlightRect);
            canvas.clipRect(mHighlightRect,Region.Op.DIFFERENCE);
        }
        canvas.drawColor((alpha << 24) | SCRIM_COLOR);
        canvas.restore();
    }

    mFocusIndicatorHelper.draw(canvas);
    super.dispatchDraw(canvas);
}
项目：FriendBook    文件：SimulationPageAnim.java    
private void drawCurrentPageArea(Canvas canvas,mBezierEnd1.y);
    mPath0.lineto(mTouchX,mTouchY);
    mPath0.lineto(mBezierEnd2.x,null);
    try {
        canvas.restore();
    } catch (Exception e) {

    }

}
项目：Bailan    文件：DownloadProgressButton.java    
private void drawProgressRectWithClip(Canvas canvas) {
    mPaint.setColor(mProgressBarColor);
    mPaint.setStyle(Paint.Style.FILL);
    //根据进度比率计算出当前的进度值对应的宽度
    int progress = (int) (mValidWidth * (getProgress() * 1.0f / getMax()));
    canvas.save();
    canvas.translate(getPaddingLeft(),getPaddingTop());
    //裁剪圆角矩形路径
    drawRoundRectPath();
    canvas.clipPath(mRoundRectPath);//裁剪之后此时画布就变成了裁剪之后的圆角矩形
    //裁剪进度路径
    drawProgresspath(progress);
    canvas.clipPath(mProgresspath,Region.Op.INTERSECT);
    canvas.drawColor(mProgressBarColor);
    canvas.restore();
}
项目：HexagonRecyclerView    文件：polygonItemView.java    
private void initData() {
    //关闭硬件加速，为了可以设置阴影
    setLayerType(LAYER_TYPE_SOFTWARE,null);

    mOuterPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mOuterPaint.setStyle(Paint.Style.stroke);
    mOuterPaint.setstrokeWidth(mOuterWidth);
    mOuterPaint.setColor(mOuterColor);


    mInnerPaint = new Paint(Paint.ANTI_ALIAS_FLAG);
    mInnerPaint.setStyle(Paint.Style.FILL_AND_stroke);
    mInnerPaint.setColor(mInnerColor);


    mRegion = new Region();
    mViewPath = new Path();
}
项目：BookPage    文件：BookPageView.java    
/**
 * 绘制A区域水平翻页阴影
 * @param canvas
 */
private void drawPathAHorizontalShadow(Canvas canvas,Path pathA){
    canvas.restore();
    canvas.save();
    canvas.clipPath(pathA,Region.Op.INTERSECT);

    int maxShadowWidth = 30;//阴影矩形最大的宽度
    int left = (int) (a.x - Math.min(maxShadowWidth,(rPathAShadowdis/2)));
    int right = (int) (a.x);
    int top = 0;
    int bottom = viewHeight;
    GradientDrawable gradientDrawable = drawableHorizontalLowerRight;
    gradientDrawable.setBounds(left,top,right,bottom);

    float mdegrees = (float) Math.todegrees(Math.atan2(f.x-a.x,f.y-h.y));
    canvas.rotate(mdegrees,a.x,a.y);
    gradientDrawable.draw(canvas);
}
项目：BookPage    文件：BookPageView.java    
/**
     * 绘制C区域内容
     * @param canvas
     * @param pathA
     */
    private void drawPathCContent(Canvas canvas,Path pathA){
        canvas.save();
        canvas.clipPath(pathA);
        canvas.clipPath(getPathC(),Region.Op.REVERSE_DIFFERENCE);//裁剪出C区域不同于A区域的部分
//        canvas.drawPath(getPathC(),pathCPaint);

        float eh = (float) Math.hypot(f.x - e.x,h.y - f.y);
        float sin0 = (f.x - e.x) / eh;
        float cos0 = (h.y - f.y) / eh;
        //设置翻转和旋转矩阵
        mMatrixArray[0] = -(1-2 * sin0 * sin0);
        mMatrixArray[1] = 2 * sin0 * cos0;
        mMatrixArray[3] = 2 * sin0 * cos0;
        mMatrixArray[4] = 1 - 2 * sin0 * sin0;

        mMatrix.reset();
        mMatrix.setValues(mMatrixArray);//翻转和旋转
        mMatrix.preTranslate(-e.x,-e.y);//沿当前XY轴负方向位移得到 矩形A₃B₃C₃D₃
        mMatrix.postTranslate(e.x,e.y);//沿原XY轴方向位移得到 矩形A4 B4 C4 D4
        canvas.drawBitmap(pathCContentBitmap,mMatrix,null);

        drawPathCShadow(canvas);
        canvas.restore();
    }
项目：MyLife    文件：FlowingMenuLayout.java    
@Override
protected void dispatchDraw(Canvas canvas) {

    width = getWidth();
    height = getHeight();
    mClipPath.reset();
    if (position == ElasticDrawer.Position.LEFT) {
        drawLeftMenu();
    } else {
        drawRightMenu();
    }
    canvas.save();
    canvas.drawPath(mClipPath,mPaint);
    canvas.clipPath(mClipPath,Region.Op.REPLACE);
    super.dispatchDraw(canvas);
    canvas.restore();
}
项目：sao    文件：CoolView.java    
@Override
public void draw(Canvas canvas) {
    int w = getWidth();
    int h = getHeight();
    canvas.clipPath(innerRoundpath(w,h),Region.Op.DIFFERENCE);
    super.draw(canvas);

    degree += speed;
    degree %= 360;
    matrix.setRotate(degree,w / 2,h / 2);
    shader.setLocalMatrix(matrix);
    rectF.left = 0;
    rectF.top = 0;
    rectF.right = w;
    rectF.bottom = h;
    canvas.drawRoundRect(rectF,radius,paint);
    invalidate();

}
项目：NovelReader    文件：SimulationPageAnim.java    
private void drawCurrentPageArea(Canvas canvas,null);
    try {
        canvas.restore();
    } catch (Exception e) {

    }

}
项目：DateTimePicker    文件：RadialTimePickerView.java    
private void drawMinutes(Canvas canvas,Path selectorPath,float alphaMod) {
    final int minutesAlpha = (int) (255f * mHoursToMinutes * alphaMod + 0.5f);
    if (minutesAlpha > 0) {
        // Exclude the selector region,then draw minutes with no
        // activated states.
        canvas.save(Canvas.CLIP_SAVE_FLAG);
        canvas.clipPath(selectorPath,Region.Op.DIFFERENCE);
        drawMinutesClipped(canvas,minutesAlpha,false);
        canvas.restore();

        // Intersect the selector region,then draw minutes with only
        // activated states.
        canvas.save(Canvas.CLIP_SAVE_FLAG);
        canvas.clipPath(selectorPath,Region.Op.INTERSECT);
        drawMinutesClipped(canvas,true);
        canvas.restore();
    }
}
项目：rclayout    文件：RCRelativeLayout.java    
@Override protected void onSizeChanged(int w,int h,int oldw,int oldh) {
    super.onSizeChanged(w,h,oldw,oldh);
    mLayer = new RectF(0,w,h);
    RectF areas = new RectF();
    areas.left = getPaddingLeft();
    areas.top = getPaddingTop();
    areas.right = w - getPaddingRight();
    areas.bottom = h - getPaddingBottom();
    mClipPath.reset();
    if (mRoundAsCircle) {
        float d = areas.width() >= areas.height() ? areas.height() : areas.width();
        float r = d / 2;
        PointF center = new PointF(w / 2,h / 2);
        mClipPath.addCircle(center.x,center.y,r,Path.Direction.CW);
        mClipPath.moveto(-mEdgeFix,-mEdgeFix);  // 通过空操作让Path区域占满画布
        mClipPath.moveto(w + mEdgeFix,h + mEdgeFix);
    } else {
        mClipPath.addRoundRect(areas,radii,Path.Direction.CW);
    }
    Region clip = new Region((int) areas.left,(int) areas.top,(int) areas.right,(int) areas.bottom);
    mAreaRegion.setPath(mClipPath,clip);
}
项目：AndroidTvDemo    文件：ColorFocusBorder.java    
/**
 * 绘制外发光阴影
 * 
 * @param canvas
 */
private void onDrawShadow(Canvas canvas)
{
    if (mShadowWidth > 0)
    {
        canvas.save();
        // 裁剪处理(使阴影矩形框内变为透明)
        if (mRoundRadius > 0)
        {
            canvas.clipRect(0,getWidth(),getHeight());
            mTempRectF.set(mFrameRectF);
            mTempRectF.inset(mRoundRadius / 2f,mRoundRadius / 2f);
            canvas.clipRect(mTempRectF,Region.Op.DIFFERENCE);
        }
        // 绘制外发光阴影效果
        canvas.drawRoundRect(mFrameRectF,mRoundRadius,mShadowPaint);
        canvas.restore();
    }
}
项目：TextReader    文件：PageWidget.java    
@Override
protected void drawCurrentPageArea(Canvas canvas) {
    mPath0.reset();
    mPath0.moveto(mBezierStart1.x,null);
    try {
        canvas.restore();
    } catch (Exception e) {

    }
}
项目：BookReader-master    文件：OverlappedWidget.java    
@Override
protected void drawNextPageAreaAndShadow(Canvas canvas) {
    canvas.save();
    if (actiondownX > mScreenWidth >> 1) {
        canvas.clipPath(mPath0);
        canvas.drawBitmap(mNextPageBitmap,null);
    }
    try {
        canvas.restore();
    } catch (Exception e) {

    }
}
项目：DailyReader    文件：ReadView.java    
private void drawCurrentPageArea(Canvas canvas,Bitmap bitmap) {
    mPath1.reset();
    mPath1.moveto(mBzStart1.x,mBzStart1.y);
    mPath1.quadTo(mBzControl1.x,mBzControl1.y,mBzEnd1.x,mBzEnd1.y);
    mPath1.lineto(mTouch.x,mTouch.y);
    mPath1.lineto(mBzEnd2.x,mBzEnd2.y);
    mPath1.quadTo(mBzControl2.x,mBzControl2.y,mBzStart2.x,mBzStart2.y);
    mPath1.lineto(mCornerX,mCornerY);
    mPath1.close();

    canvas.save();
    canvas.clipPath(mPath1,null);
    canvas.restore();
}
项目：phonk    文件：MyRoundCornerDrawable.java    
@Override
public void draw(Canvas canvas) {
    int height = getBounds().height();
    int width = getBounds().width();

    // allow drawing out of bounds vertically
    Rect clipBounds = canvas.getClipBounds();
    clipBounds.inset(-12,-12);
    canvas.clipRect(clipBounds,Region.Op.REPLACE);

    RectF rect = new RectF(0.0f,0.0f,width,height);

    // background
    canvas.drawRoundRect(rect,mRadius,mPaintBg);

    // border
    canvas.drawRoundRect(rect,mPaintBorder);
}
项目：Android-Week-View    文件：WeekView.java    
private void drawTimeColumnAndAxes(Canvas canvas) {
    // Draw the background color for the header column.
    canvas.drawRect(0,mHeaderTextHeight + mHeaderRowPadding * 2,mHeaderColumnWidth,getHeight(),mHeaderColumnBackgroundPaint);

    // Clip to paint in left column only.
    canvas.clipRect(0,Region.Op.REPLACE);

    for (int i = 0; i < 24; i++) {
        float top = mHeaderTextHeight + mHeaderRowPadding * 2 + mCurrentOrigin.y + mHourHeight * i + mHeaderMarginBottom;

        // Draw the text if its y position is not outside of the visible area. The pivot point of the text is the point at the bottom-right corner.
        String time = getDateTimeInterpreter().interpretTime(i);
        if (time == null)
            throw new IllegalStateException("A DateTimeInterpreter must not return null time");
        if (top < getHeight()) canvas.drawText(time,mTimeTextWidth + mHeaderColumnPadding,top + mTimeTextHeight,mTimeTextPaint);
    }
}
项目：FlickLauncher    文件：DragLayer.java    
@Override
protected void dispatchDraw(Canvas canvas) {
    // Draw the background below children.
    if (mBackgroundAlpha > 0.0f) {
        // Update the scroll position first to ensure scrim cutout is in the right place.
        mLauncher.getWorkspace().computeScrollWithoutInvalidation();

        int alpha = (int) (mBackgroundAlpha * 255);
        CellLayout currCellLayout = mLauncher.getWorkspace().getCurrentDragOverlappingLayout();
        canvas.save();
        if (currCellLayout != null && currCellLayout != mLauncher.getHotseat().getLayout()) {
            // Cut a hole in the darkening scrim on the page that should be highlighted,Region.Op.DIFFERENCE);
        }
        canvas.drawColor((alpha << 24) | SCRIM_COLOR);
        canvas.restore();
    }

    mFocusIndicatorHelper.draw(canvas);
    super.dispatchDraw(canvas);
}
项目：Vorolay    文件：VoronoiView.java    
@Override
    protected boolean drawChild(Canvas canvas,View child,long drawingTime) {
        Integer index = (Integer) child.getTag();
        VoronoiRegion region = mRegions.get(index);

        // firstly clip and draw children
        canvas.clipPath(region.path,Region.Op.REPLACE);
        boolean result = super.drawChild(canvas,child,drawingTime);

        // then draw borders
        if (mBorderEnabled)
            canvas.drawPath(region.path,p);

        // draw site
//        canvas.drawCircle((float)region.site.x,(float)region.site.y,10,p);

        return result;
    }
项目：PresenterLite    文件：ShapedImageView.java    
private Bitmap clippedRotatedoval(Bitmap bitmap) {
    Bitmap bmp;
    float width = bitmap.getWidth();
    float height = bitmap.getHeight();

    bmp = Bitmap.createBitmap((int) width,(int) height,Bitmap.Config.ARGB_8888);
    BitmapShader shader = new BitmapShader(bitmap,BitmapShader.TileMode.CLAMP,BitmapShader.TileMode.CLAMP);

    Canvas canvas = new Canvas(bmp);
    Paint paint = new Paint();
    paint.setAntiAlias(true);
    paint.setShader(shader);

    Path oval = new Path();
    Matrix matrix = new Matrix();
    Region region = new Region();
    RectF ovalRect = new RectF(width / oval_FACTOR,width - (width / oval_FACTOR),height);

    oval.addoval(ovalRect,Path.Direction.CW);
    matrix.postRotate(ROTATION,width / 2,height / 2);
    oval.transform(matrix,oval);
    region.setPath(oval,new Region((int) width / 2,(int) width,(int) height));
    canvas.drawPath(region.getBoundaryPath(),paint);

    return bmp;
}
项目：GitHub    文件：FishLoadingRenderer.java    
@Override
protected void draw(Canvas canvas,Rect bounds) {
    int saveCount = canvas.save();
    RectF arcBounds = mTempBounds;
    arcBounds.set(bounds);

    mPaint.setColor(mColor);

    //calculate fish clip bounds
    //clip the width of the fish need to increase mPathDottedLinesize * 1.2f
    RectF fishRectF = new RectF(mFishHeadPos[0] - mFishWidth / 2.0f - mPathDottedLinesize * 1.2f,mFishHeadPos[1] - mFishHeight / 2.0f,mFishHeadPos[0] + mFishWidth / 2.0f + mPathDottedLinesize * 1.2f,mFishHeadPos[1] + mFishHeight / 2.0f);
    Matrix matrix = new Matrix();
    matrix.postRotate(mFishRotatedegrees,fishRectF.centerX(),fishRectF.centerY());
    matrix.mapRect(fishRectF);

    //draw river
    int riverSaveCount = canvas.save();
    mPaint.setStyle(Paint.Style.stroke);
    canvas.clipRect(fishRectF,Region.Op.DIFFERENCE);
    canvas.drawPath(createRiverPath(arcBounds),mPaint);
    canvas.restoretoCount(riverSaveCount);

    //draw fish
    int fishSaveCount = canvas.save();
    mPaint.setStyle(Paint.Style.FILL);
    canvas.rotate(mFishRotatedegrees,mFishHeadPos[0],mFishHeadPos[1]);
    canvas.clipPath(createFisheyePath(mFishHeadPos[0],mFishHeadPos[1] - mFishHeight * 0.06f),Region.Op.DIFFERENCE);
    canvas.drawPath(createFishPath(mFishHeadPos[0],mFishHeadPos[1]),mPaint);
    canvas.restoretoCount(fishSaveCount);

    canvas.restoretoCount(saveCount);
}
项目：GitHub    文件：PageWidget.java    
@Override
protected void drawNextPageAreaAndShadow(Canvas canvas) {
    mPath1.reset();
    mPath1.moveto(mBezierStart1.x,mBezierStart1.y);
    mPath1.lineto(mBeziervertex1.x,mBeziervertex1.y);
    mPath1.lineto(mBeziervertex2.x,mBeziervertex2.y);
    mPath1.lineto(mBezierStart2.x,mBezierStart2.y);
    mPath1.lineto(mCornerX,mCornerY);
    mPath1.close();

    mdegrees = (float) Math.todegrees(Math.atan2(mBezierControl1.x - mCornerX,mBezierControl2.y - mCornerY));
    int leftx;
    int rightx;
    GradientDrawable mBackShadowDrawable;
    if (mIsRTandLB) {  //左下及右上
        leftx = (int) (mBezierStart1.x);
        rightx = (int) (mBezierStart1.x + mTouchToCornerdis / 4);
        mBackShadowDrawable = mBackShadowDrawableLR;
    } else {
        leftx = (int) (mBezierStart1.x - mTouchToCornerdis / 4);
        rightx = (int) mBezierStart1.x;
        mBackShadowDrawable = mBackShadowDrawableRL;
    }
    canvas.save();
    try {
        canvas.clipPath(mPath0);
        canvas.clipPath(mPath1,Region.Op.INTERSECT);
    } catch (Exception e) {
    }


    canvas.drawBitmap(mNextPageBitmap,null);
    canvas.rotate(mdegrees,mBezierStart1.x,mBezierStart1.y);
    mBackShadowDrawable.setBounds(leftx,(int) mBezierStart1.y,rightx,(int) (mMaxLength + mBezierStart1.y));//左上及右下角的xy坐标值,构成一个矩形
    mBackShadowDrawable.draw(canvas);
    canvas.restore();
}
项目：GitHub    文件：CardItemView.java    
private boolean isEventInPath(MotionEvent event) {
    RectF bounds = new RectF();
    mDrawPath.computeBounds(bounds,true);
    mRegion.setPath(mDrawPath,new Region((int)bounds.left,(int)bounds.top,(int)bounds.right,(int)bounds.bottom));
    return mRegion.contains((int) event.getX(),(int) event.getY());
}
项目：FriendBook    文件：SimulationPageAnim.java    
private void drawNextPageAreaAndShadow(Canvas canvas,Bitmap bitmap) {
    mPath1.reset();
    mPath1.moveto(mBezierStart1.x,mCornerY);
    mPath1.close();

    mdegrees = (float) Math.todegrees(Math.atan2(mBezierControl1.x
            - mCornerX,Region.Op.INTERSECT);
    } catch (Exception e) {
    }


    canvas.drawBitmap(bitmap,构成一个矩形
    mBackShadowDrawable.draw(canvas);
    canvas.restore();
}
项目：Android-Code-Demos    文件：RegionClickView.java    
@Override
protected void onSizeChanged(int w,oldh);
    mCirclePath.addCircle(w / 2,h / 2,300,Path.Direction.CW);
    Region globalRegion = new Region(-w,-h,h);
    mCircleRegion.setPath(mCirclePath,globalRegion);
}
项目：react-native-andorid-shadow    文件：ShadowParentView.java    
private void drawShadow(Canvas canvas) {
    if (shadowDrawable != null) {

        Rect newRect = canvas.getClipBounds();
        Log.d(TAG,"ShadowParentView has blur! " + newRect);
        newRect.inset(-shadowPadding,-shadowPadding);
        canvas.clipRect (newRect,Region.Op.REPLACE);

        shadowDrawable.draw(canvas);
    }
}
项目：BookPage    文件：BookPageView.java    
/**
 * 绘制A区域左阴影
 * @param canvas
 */
private void drawPathALeftShadow(Canvas canvas,Path pathA){
    canvas.restore();
    canvas.save();

    int left;
    int right;
    int top = (int) e.y;
    int bottom = (int) (e.y+viewHeight);

    GradientDrawable gradientDrawable;
    if (style.equals(STYLE_TOP_RIGHT)) {
        gradientDrawable = drawableLeftTopRight;
        left = (int) (e.x - lPathAShadowdis /2);
        right = (int) (e.x);
    } else {
        gradientDrawable = drawableLeftLowerRight;
        left = (int) (e.x);
        right = (int) (e.x + lPathAShadowdis /2);
    }

    Path mPath = new Path();
    mPath.moveto(a.x- Math.max(rPathAShadowdis,lPathAShadowdis) /2,a.y);
    mPath.lineto(d.x,d.y);
    mPath.lineto(e.x,e.y);
    mPath.lineto(a.x,a.y);
    mPath.close();
    canvas.clipPath(pathA);
    canvas.clipPath(mPath,Region.Op.INTERSECT);

    float mdegrees = (float) Math.todegrees(Math.atan2(e.x-a.x,a.y-e.y));
    canvas.rotate(mdegrees,e.x,e.y);

    gradientDrawable.setBounds(left,bottom);
    gradientDrawable.draw(canvas);
}
项目：BookPage    文件：BookPageView.java    
/**
     * 绘制A区域右阴影
     * @param canvas
     */
    private void drawPathARightShadow(Canvas canvas,Path pathA){
        canvas.restore();
        canvas.save();

        float viewDiagonalLength = (float) Math.hypot(viewWidth,viewHeight);//view对角线长度
        int left = (int) h.x;
        int right = (int) (h.x + viewDiagonalLength*10);//需要足够长的长度
        int top;
        int bottom;

        GradientDrawable gradientDrawable;
        if (style.equals(STYLE_TOP_RIGHT)) {
            gradientDrawable = drawableRightTopRight;
            top = (int) (h.y- rPathAShadowdis /2);
            bottom = (int) h.y;
        } else {
            gradientDrawable = drawableRightLowerRight;
            top = (int) h.y;
            bottom = (int) (h.y+ rPathAShadowdis /2);
        }
        gradientDrawable.setBounds(left,bottom);

        Path mPath = new Path();
        mPath.moveto(a.x- Math.max(rPathAShadowdis,a.y);
//        mPath.lineto(i.x,i.y);
        mPath.lineto(h.x,h.y);
        mPath.lineto(a.x,a.y);
        mPath.close();
        canvas.clipPath(pathA);
        canvas.clipPath(mPath,Region.Op.INTERSECT);

        float mdegrees = (float) Math.todegrees(Math.atan2(a.y-h.y,a.x-h.x));
        canvas.rotate(mdegrees,h.x,h.y);
        gradientDrawable.draw(canvas);
    }
项目：BookPage    文件：BookPageView.java    
/**
 * 绘制B区域内容
 * @param canvas
 * @param pathA
 */
private void drawPathBContent(Canvas canvas,Path pathA){
    canvas.save();
    canvas.clipPath(pathA);//裁剪出A区域
    canvas.clipPath(getPathC(),Region.Op.UNION);//裁剪出A和C区域的全集
    canvas.clipPath(getPathB(),Region.Op.REVERSE_DIFFERENCE);//裁剪出B区域中不同于与AC区域的部分
    canvas.drawBitmap(pathBContentBitmap,null);

    drawPathBShadow(canvas);
    canvas.restore();
}
项目：BaseVLayoutAdapterHelper    文件：Sectiondecoration.java    
@Override
public void onDrawOver(Canvas c,RecyclerView parent,RecyclerView.State state) {
    if (mPinnedHeaderView != null) {
        c.save();

        mClipBounds.top = 0;
        c.clipRect(mClipBounds,Region.Op.UNION);
        c.translate(0,mPinnedHeaderTop);
        mPinnedHeaderView.draw(c);

        c.restore();
    }
}
项目：XERUNG    文件：HighlightView.java    
protected void draw(Canvas canvas) {
    canvas.save();
    Path path = new Path();
    outlinePaint.setstrokeWidth(outlinewidth);
    if (!hasFocus()) {
        outlinePaint.setColor(Color.BLACK);
        canvas.drawRect(drawRect,outlinePaint);
    } else {
        Rect viewDrawingRect = new Rect();
        viewContext.getDrawingRect(viewDrawingRect);

        path.addRect(new RectF(drawRect),Path.Direction.CW);
        outlinePaint.setColor(highlightColor);

        if (isClipPathSupported(canvas)) {
            canvas.clipPath(path,Region.Op.DIFFERENCE);
            canvas.drawRect(viewDrawingRect,outsidePaint);
        } else {
            drawOutsideFallback(canvas);
        }

        canvas.restore();
        canvas.drawPath(path,outlinePaint);

        if (showThirds) {
            drawThirds(canvas);
        }

        if (showCircle) {
            drawCircle(canvas);
        }

        if (handleMode == HandleMode.Always ||
                (handleMode == HandleMode.Changing && modifyMode == ModifyMode.Grow)) {
            drawHandles(canvas);
        }
    }
}
项目：HappyBubble    文件：BubbleLayout.java    
@Override
public boolean onTouchEvent(MotionEvent event)
{
    if (event.getAction() == MotionEvent.ACTION_DOWN)
    {
        RectF r = new RectF();
        mPath.computeBounds(r,true);
        mRegion.setPath(mPath,new Region((int) r.left,(int) r.top,(int) r.right,(int) r.bottom));
        if (!mRegion.contains((int) event.getX(),(int) event.getY()))
        {
            mListener.edge();
        }
    }
    return super.onTouchEvent(event);
}
项目：open-rmbt    文件：Gauge.java    
@Override
public void draw(final Canvas canvas)
{
    final Rect r = getBounds();

    final int saveCount = canvas.save();

    canvas.clipRect(r,Region.Op.REPLACE);
    canvas.translate(r.left,r.top);

    canvas.drawBitmap(background,paint);

    drawCanvas.drawColor(Color.TRANSPARENT,PorterDuff.Mode.CLEAR);
    drawCanvas.drawBitmap(dynamic,null);
    final float angle;
    if (maxAngle >= 0)
        angle = -(float) (360d - (maxAngle * value));
    else
        angle = (float) (360d - (-maxAngle * value));
    drawCanvas.drawArc(ovalRect,startAngle,angle,true,erasePaint);

    canvas.drawBitmap(drawBitmap,paint);

    canvas.drawBitmap(foreground,paint);

    // canvas.drawText(formatter.format(value),textx,textY,textPaint);

    canvas.restoretoCount(saveCount);
}

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