SRGDisplayBase::m_DisplayRect
CRect SRGDisplayBase::m_DisplayRectRectangle which contains the usable data display area
Remarks
The rectangle starts out each draw cycle with the whole component area.
As items are drawn, this rectangle is reduced in size so that subsequent items know how much
area is left to work with. For example, the component reduces the area to account
for its borders. The labels then reduce the area to account for their widths and heights
leaving the axis and data to be drawn in the area that is left.