draw-major-tics

Arguments: chart-axis

Returns the value of the draw-major-tics property of a chart-axis. The value may be set at creation time by passing the :draw-major-tics initarg, or any time later by calling (setf draw-major-tics).

A value indicating whether (and how) tic marks are drawn for the major tic positions of a chart-axis in a chart-widget. Here are the possible values:

• nil - Major tic marks are not drawn.
• t - Major tic marks are drawn, and are drawn at the major tic positions. This is the default value.
• :after - Each major tic mark is drawn midway between its official position and the position of the next major tic mark. This may be useful for delimiting groups of non-stacked bars, for example, rather than pointing to the middle of each group of bars. This choice is probably not aesthetic when draw-minor-grid-lines is true.
• :before - Like :after, except that each tic mark is drawn between its official position and that of the previous tic mark.
• :between - Like :after and :before except that no tic mark is drawn before the first major tic position or after the last one.

See also draw-major-labels, major-tic-length, major-tic-width, major-tic-increment, and draw-minor-tics.

See chart-widget and also cg-chart-widget.htm.

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Created 2012.5.30.