.CHART SET TITLE

This subroutine is called to set the title for the "current" chart.

Usage:

      PASS         <chart_title>              FIELD            SHARE? N
      PASS         <text_box_name>            FIELD            SHARE? N
      GOSUB    0CD .CHART SET TITLE
      *        Check for error
      IF       0CD .CHART SET TITLE           NE

Description:

This subroutine sets the title for the "current" chart. This subroutine only needs to be called if the chart is to have a title or if a previously set chart title is to be changed or removed.

<chart_title> is the text string which will be rendered as the chart title in a text box normally positioned at the top the chart area. The <chart_title> parameter is optional.

• If a non-blank <chart_title> is passed, then a title is set for the "current" chart. If a title has been previously set, then that title is replaced.
• If a <chart_title> is not passed or if a blank title is passed, then no title is set. If a title has been previously set, then that title is cleared along with all of the related chart title attributes.

<text_box_name> is the name of a previously initialized text box. The <text_box_name> parameter is optional.

• If a <text_box_name> is passed, then the attributes of the specified text box are used as a prototype for the attributes of the <chart_title>. Two special keywords may be used in lieu of a <text_box_name>: "INITIALIZE" and "CURRENT"
  • "INITIALIZE" indicates that the chart title is to be set and no special title attributes are to be set. Any previously set title attributes are to be cleared.
  • "CURRENT" indicates that the chart title is to be set and the attributes of the "current" text box are to be used as a prototype for the attributes of the <chart_title>.
• If a <text_box_name> is not passed, then the following rules determine how the attributes of the chart title are set:
  • If the chart title has been previously set, then the new chart title is set and any previously set attributes of the chart title are not changed.
  • If the chart title has not been previously set, then the attributes of the "current" text box will be used as a prototype for the attributes of the <chart_title> provided that the "current" text box has been explicitly initialized or is associated with another chart's title. If the "current" text box is not appropriate, then no attributes of the <chart_title> will be set in conjunction with setting the chart title.

If no attributes are set for a chart title, the title is rendered using certain default text attributes which are appropriate for a chart title. For example, the chart title will be be positioned at the top of the chart area, centered horizontally, and rendered using a larger, bold font.

The chart title text box become the "current" text box and subsequent calls to the various text subroutines may be made to further set/modify the text attributes of the chart title.

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-- SteveFrizzell - 2010-03-17