PageWidget.java 文件源码

@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, 0, 0, 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();
}