DEC Text Processing Utility Program Development 5.3 Writing Code Compatible with DECwindows EVE

•Use the MB1 mouse button with the Shift key to extend a selection

EVE implements a static selection by creating a range upon which you can perform EVE commands such as STORE TEXT or REMOVE. However, EVE does not use the DECTPU SELECT built-in procedure to start this range. Thus, if you use the SELECT_RANGE built-in while a static selection is active, DECTPU returns the message ‘‘No select active.’’

If you move the text cursor off the text in the static selection, the selection is canceled.

5.3.1.3 Found Range Selection

When EVE positions to the beginning of a range as the result of the FIND command, the WILDCARD FIND command, or pressing the Find key, EVE creates a found range that contains the text EVE found as a match for your search string. If no other selection is active, EVE treats the found range as the current selection.

EVE implements a found range selection by creating a range upon which you can perform EVE commands such as STORE TEXT or REMOVE. However, EVE does not use the DECTPU SELECT built-in procedure to start this range. Thus, if you use the SELECT_RANGE built-in while a found range selection is active, DECTPU returns the message ‘‘No select active.’’

If you move the text cursor off the text in the found range selection, the selection is canceled.

5.3.1.4 Relation of EVE Selection to DECwindows Global Selection

If EVE has a dynamic selection or a static selection active, that selection is automatically designated as the primary global selection. A found range selection is not designated as the primary global selection.

You can use the routine EVE$SELECTION to get the text of the primary global selection when an application other than DECTPU owns the selection. To do so, the call to EVE$SELECTION must be in code bound to a mouse button other than MB1. The value returned is a string that contains the text of the primary global selection.

5.4 Compiling DECTPU Programs

Before compiling programs in DECTPU, you should enable the display of informational messages to help you locate errors. EVE automatically enables the display of informational messages for you when you use the EXTEND EVE command. For more information on displaying messages, see the description of the SET (INFORMATIONAL) built-in procedure in the DEC Text Processing Utility Reference Manual.

The DECTPU compiler numbers the lines of code it compiles. The line numbers begin with 1. For a string, all DECTPU statements are considered to be on line

1.For a range, line 1 is the first line of the range, regardless of where in the

buffer the range begins. Buffers are numbered starting at the first line. When a compilation error occurs, DECTPU tells you the approximate line number where the error occurred. To move to the line at which the error occurred, use the POSITION (integer) built-in procedure.

In EVE, you can use the LINE command. For example, the command LINE 42 moves the editing point and the cursor to line 42.

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Compaq AA-PWCBD-TE manual Compiling Dectpu Programs, Found Range Selection
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