Difference between revisions of "MENU FROM"
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[[Category:Commands]] | [[Category:Commands]] | ||
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Revision as of 08:31, 3 June 2009
Contents
Class
Menus
Purpose
Display a framed menu of options from a database table file
Syntax
MENU FROM <mdf filename> | (<expC1>)
AT <expN1>,<expN2> TO <expN3>,<expN4>
[BOLD]
[CLEAR]
[EXIT]
[HELPFILE <hlp filename> | (<expC2>)]
[LABEL <expC3>]
[NOREFRESH]
[OFF]
[QUIT]
[SELECT <expC4>]
See Also
@...MENU, MENU AT, MENU COMMAND, MENU FIELDS, MENU FILES, MENU FORMAT, MENU QUERY, MENU SCOPE, MENU(), MENUITEM()
Description
The MENU FROM command uses the entries in a standard Recital table (but with a .mdf filename) to construct a framed menu of options. The filename can be substituted with a <expC1>, enclosed in round brackets, which returns a valid filename. The table has an extension of .mdf and must have the following structure:
| Field | Type | Width |
|---|---|---|
| MENU | Character | 25 |
| COMMAND | Character | 80 |
| HELP | Character | 80 |
| NOREFRESH | Logical | 1 |
Each record in the database is equivalent to a command in the from: @…MENU <item> COMMAND <command> HELP <help> [NOREFRESH]. When a menu is activated from an <.mdf filename> the items in the database are vertically scrollable as with the MENU FILES command. The command list specified with a menu item can be another MENU FROM command, or a DO <procedure> command which activates another menu using any of the set of menu commands available in the Recital 4GL.
AT <expN1>,<expN2> TO <expN3>,<expN4>
The upper left corner of the menu is positioned on the coordinates <expN1> and <expN2>, and the lower right corner of the menu is positioned on the coordinates <expN3> and <expN4>.
| Keyword | Description |
|---|---|
| BOLD | The menu frame is highlighted. |
| CLEAR | The inside of the menu frame is cleared before displaying the menu. |
| EXIT | The menu is exited following selection of a menu item and execution of the associated commands.. If the NOEXIT command is executed as one of the commands associated with a menu item, then the menu will not be exited. |
| HELPFILE <.hlp> | A helpful text file can be associated with the menu. The <.hlp filename> will be displayed in a read-only window for viewing when the [HELP] key is pressed. The window will be labeled "Operating instructions." The file name can be substituted with a <expC2>, enclosed in round brackets, which returns a valid filename. If no file extension is specified, then ".hlp" is assumed. The command, INSTRUCT, must be set ON when using this option. |
| LABEL <expC3> | The specified character string <expC3> is displayed at the top of the menu frame. |
| NOREFRESH | The menu is generated without executing the extra commands (e.g. frame drawing) associated with it. |
| OFF | The display of messages in the message line is disabled. |
| QUIT | When the QUIT option is specified, the [ABANDON] key exits the menu. |
| SELECT <expC4> | Multiple selections can be made. The MENUITEM() function can be used to return a string containing the selections made, each separated with <expC4>. Selections are made by placing the cursor on the required menu item and pressing the [RETURN] key. Once all the required selections have been made, the [EXIT/SAVE] key is used to save them or the [ABANDON] key will cancel them. The ASTORE() function can be used to place all the selections into separate array items. |
Example
create menufile rename menufile.dbf menufile.mdf menu from menufile at 1,35 to 10,45 label "Options"
Products
Recital Mirage Server, Recital Terminal Developer
