GEMPAK Overlays: Multi-panel Displays

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16.0 GEMPAK Overlays: Multi-panel Displays

Multi-panel displays are composed in a manner very similar to overlays. The first panel is drawn with CLEAR=YES, and subsequent panels are drawn with CLEAR=NO. The only difference is that the PANEL variable is changed to a different region of the window. Of course, you can create multi-panel displays with overlays too!

PANEL specifies the panel location, panel outline color, line type and width separated with slashes:

 
      panel location / outline color / line type / width / region

The panel location determines the location of the view region on the graphics device. It may be specified using a number or abbreviation as follows:

  
        NUMBER  ABBREVIATION    DESCRIPTION
        0       ALL             Entire device
        1       UL              Upper left quadrant
        2       UR              Upper right quadrant
        3       LL              Lower left quadrant
        4       LR              Lower right quadrant
        5       L               Left half
        6       R               Right half
        7       T               Top half
        8       B               Bottom half

An easy 9-panel capability uses abbreviations M1,...,M9 which will be laid out on the page as:

  
                M1      M2      M3
  
                M4      M5      M6
  
                M7      M8      M9

Horizontal or vertical panels which divide the screen into thirds or fourths may be created using the syntax Tij where T is either V for vertical or H for horizontal, i is 3 for thirds or 4 for fourths, and j is the actual panel counting from the top or left.

The view region may also be specified as four numbers separated with semicolons, giving the lower left and upper right corners in fractions of the graphics display area. The origin is in the lower left of the display. For example, the lower left quadrant can be given as:

  
                0;0;.5;.5

If the panel location is unspecified, the current location is unchanged.

The panel outline color, line type and line width specify the values used to draw a box around the specified region. The valid regions are VIEW, PLOT and DEVICE. If the color is 0 or unspecified, no box is drawn.

GEMPAK Online Tutorial > GEMPAK Overlays

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