some editor gui code

struct EDGUISurfaceProps : EDGUILayoutRow
{
    EDGUISurfaceProps() :
        m_xoff( 0, 2, 0, 1 ),
        m_yoff( 0, 2, 0, 1 ),
        m_xscale( 1, 2, 0.01f, 100 ),
        m_yscale( 1, 2, 0.01f, 100 ),
        m_angle( 0, 1, 0, 360 )
    {
        m_xoff.caption = "X offset";
        m_yoff.caption = "Y offset";
        m_xscale.caption = "X scale";
        m_yscale.caption = "Y scale";
        m_angle.caption = "Angle";

        Add( &m_group );
        m_group.Add( &m_xoff );
        m_group.Add( &m_yoff );
        m_group.Add( &m_xscale );
        m_group.Add( &m_yscale );
        m_group.Add( &m_angle );
    }

    void Prepare( EdSurface& S, int sid )
    {
        char bfr[ 32 ];
        snprintf( bfr, sizeof(bfr), "Surface #%d", sid );
        m_group.caption = bfr;
        m_group.SetOpen( true );

        m_xoff.SetValue( S.xoff );
        m_yoff.SetValue( S.yoff );
        m_xscale.SetValue( S.xscale );
        m_yscale.SetValue( S.yscale );
        m_angle.SetValue( S.angle );
    }

    EDGUIGroup m_group;
    EDGUIPropFloat m_xoff;
    EDGUIPropFloat m_yoff;
    EDGUIPropFloat m_xscale;
    EDGUIPropFloat m_yscale;
    EDGUIPropFloat m_angle;
};