TriangleElement.TriangleElementClass.SetupDeviceRatio C# (CSharp) Метод

    private void SetupDeviceRatio(int hDC, ESRI.ArcGIS.Display.IDisplay display)
    {
      if (display.DisplayTransformation != null)
      {
        if (display.DisplayTransformation.Resolution != 0)
        {
          m_dDeviceRatio = display.DisplayTransformation.Resolution / 72;
          //  Check the ReferenceScale of the display transformation. If not zero, we need to
          //  adjust the Size, XOffset and YOffset of the Symbol we hold internally before drawing.
          if (display.DisplayTransformation.ReferenceScale != 0)
            m_dDeviceRatio = m_dDeviceRatio * display.DisplayTransformation.ReferenceScale / display.DisplayTransformation.ScaleRatio;
        }
      }
      else
      {
        // If we don't have a display transformation, calculate the resolution
        // from the actual device.
        if (display.hDC != 0)
        {
          // Get the resolution from the device context hDC.
          m_dDeviceRatio = System.Convert.ToDouble(GetDeviceCaps(hDC, LOGPIXELSX)) / 72;
        }
        else
        {
          // If invalid hDC assume we're drawing to the screen.
          m_dDeviceRatio = 1 / (TwipsPerPixelX() / 20); // 1 Point = 20 Twips.
        }
      }
    }