Android翻页效果，电子书(8)

      }    
          
      private boolean computePageTurn() {    
//        if ((this.mDrawnTimeStep == this.mTimeStep) ||(this.mTimeStep <0)||(this.mTimeStep >this.mMaxStep)) {    
          if ( (this.mTimeStep <0)||(this.mTimeStep >this.mMaxStep)) {    
              return false;    
          }    
          if (this.mPage == null) {    
              return false;    
          }    
          this.mDrawnTimeStep = this.mTimeStep;    
          View child = this.mPage.getChildAt(0);    
          child.getDrawingRect(this.mChildRect);    
//        this.mOuterOffsetX = (child.getLeft() - getLeft());    
//        this.mOuterOffsetY = (child.getTop() - getTop());    
          this.mOuterOffsetX = 0;    
          this.mOuterOffsetY = 0;    
   
          float width = this.mChildRect.right;    
          float height = this.mChildRect.bottom;    
          if(!mStepping){    
              this.mPivotX = (this.mTimeStep / 30.0f * width);    
          }    
          this.mForegroundPath = new Path();    
          this.mBackPagePath = new Path();    
          this.mBackgroundPath = new Path();    
          float slope = width / (this.mPivotX - width);    
          float y = this.mPivotX * slope;