Paint.SpeedGauge.CreateGraphicsRectangles C# (CSharp) Method

        private void CreateGraphicsRectangles(IGraphicsDisplay graphicsDisplay)
        {
            var graphicsRectangleProgressBarLeft = graphicsDisplay.SourceRectangleFromImageType(ImageType.SlowIcon);
            var graphicsRectangleProgressBarRight = graphicsDisplay.SourceRectangleFromImageType(ImageType.SpeedIcon);

            var yDiff = this.speedGaugeDefinition.Bounds.Height - graphicsRectangleProgressBarLeft.Height;

            this.boundsLeftImage = new Rectangle(
                this.speedGaugeDefinition.Bounds.X,
                this.speedGaugeDefinition.Bounds.Y + yDiff / 2,
                graphicsRectangleProgressBarLeft.Width,
                this.speedGaugeDefinition.Bounds.Height - yDiff);

            this.boundsRightImage = new Rectangle(
                this.speedGaugeDefinition.Bounds.X + (this.speedGaugeDefinition.Bounds.Width - graphicsRectangleProgressBarRight.Width),
                this.speedGaugeDefinition.Bounds.Y + yDiff / 2,
                graphicsRectangleProgressBarRight.Width,
                this.speedGaugeDefinition.Bounds.Height - yDiff);

            this.boundsMiddleImage = new Rectangle(
                this.speedGaugeDefinition.Bounds.X + this.boundsLeftImage.Width,
                this.speedGaugeDefinition.Bounds.Y + yDiff / 2,
                this.speedGaugeDefinition.Bounds.Width - (graphicsRectangleProgressBarRight.Width + graphicsRectangleProgressBarLeft.Width),
                this.speedGaugeDefinition.Bounds.Height - yDiff);
        }