位置转化

private void DrawScale()        {            double majorTickUnitValue = this.ScaleSweepLenth / this.MajorDivisionsCount;            double minorTickUnitValue = this.ScaleSweepLenth / this.MinorDivisionsCount;            double correctionOffset = this.rootGrid.Width / 2 ;            Double minvalue = MinValue; ;            //画主刻度            for (int i = 0; i < this.MajorDivisionsCount; i++)            {                Rectangle majorTickRect = new Rectangle();                majorTickRect.Height = this.MajorTickSize.Height;                majorTickRect.Width = this.MajorTickSize.Width;                majorTickRect.Fill = new SolidColorBrush(this.MajorTickColor);                TransformGroup majorTickTransformGroup = new TransformGroup();                TranslateTransform majorTickTranslateTransform = new TranslateTransform();                majorTickTranslateTransform.X = i * majorTickUnitValue - correctionOffset;                majorTickTranslateTransform.Y = this.MajorMinorDivisionOffset;                majorTickTransformGroup.Children.Add(majorTickTranslateTransform);                majorTickRect.RenderTransform = majorTickTransformGroup;                this.rootGrid.Children.Add(majorTickRect);            }        }

动画

private void MovePointerUsingAnimate(double oldValue, double newValue)        {            if (null != this.pointer)            {                double distanceOldAndNew = Math.Abs(newValue - oldValue);                DoubleAnimation doubleAnimation = new DoubleAnimation();                double animDuration = 0.0f;                Storyboard movingPointerStoryboard = new Storyboard();                TransformGroup transformGroup = new TransformGroup();                TranslateTransform transform = new TranslateTransform();                           doubleAnimation.From = oldValue;                doubleAnimation.To = newValue;                animDuration = distanceOldAndNew * animatingSpeedFactor;                doubleAnimation.Duration = new Duration(TimeSpan.FromMilliseconds(animDuration));                movingPointerStoryboard.Completed +=new EventHandler(MovingPointerStoryboardStoryboard_Completed);                movingPointerStoryboard.Children.Add(doubleAnimation);                Storyboard.SetTarget(doubleAnimation, this.pointer);                transformGroup.Children.Add(transform);                this.pointer.RenderTransform = transformGroup;                Storyboard.SetTargetProperty(doubleAnimation,                    new PropertyPath("(Path.RenderTransform).(TransformGroup.Children)[0].(TranslateTransform.X)"));                if (Math.Abs(oldValue - newValue) > 0)                {                    movingPointerStoryboard.Begin();                }            }        }