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+ * Copyright 2018-2023,2024 Thomas E. Dickey *
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- * @Id: form_driver.3x,v 1.26 2016/12/04 01:01:17 tom Exp @
+ * @Id: form_driver.3x,v 1.61 2024/04/20 18:55:09 tom Exp @
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-<H1 class="no-header">form_driver 3x</H1>
+<H1 class="no-header">form_driver 3x 2024-04-20 ncurses 6.4 Library calls</H1>
<PRE>
-<STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG> <STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG>
+<STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG> Library calls <STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
- <STRONG>form_driver</STRONG>, <STRONG>form_driver_w</STRONG> - command-processing loop of
- the form system
+ <STRONG>form_driver</STRONG>, <STRONG>form_driver_w</STRONG> - command-processing loop of the form system
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><form.h></STRONG>
+
<STRONG>int</STRONG> <STRONG>form_driver(FORM</STRONG> <STRONG>*</STRONG><EM>form</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>c</EM><STRONG>);</STRONG>
- <STRONG>int</STRONG> <STRONG>form_driver_w(FORM</STRONG> <STRONG>*</STRONG><EM>form</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>c</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <EM>wch</EM><STRONG>);</STRONG>
+ <STRONG>int</STRONG> <STRONG>form_driver_w(FORM</STRONG> <STRONG>*</STRONG><EM>form</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>c</EM><STRONG>,</STRONG> <STRONG>wchar_t</STRONG> <EM>wc</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
</PRE><H3><a name="h3-form_driver">form_driver</a></H3><PRE>
- Once a form has been posted (displayed), you should funnel
- input events to it through <STRONG>form_driver</STRONG>. This routine has
- three major input cases:
+ Once a form has been posted (displayed), you should funnel input events
+ to it through <STRONG>form_driver</STRONG>. This routine has three major input cases:
- <STRONG>o</STRONG> The input is a form navigation request. Navigation
- request codes are constants defined in <STRONG><form.h></STRONG>, which
- are distinct from the key- and character codes
- returned by <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG>.
+ <STRONG>o</STRONG> The input is a form navigation request. Navigation request codes
+ are constants defined in <STRONG><form.h></STRONG>, which are distinct from the key-
+ and character codes returned by <STRONG><A HREF="curs_getch.3x.html">wgetch(3x)</A></STRONG>.
- <STRONG>o</STRONG> The input is a printable character. Printable charac-
- ters (which must be positive, less than 256) are
- checked according to the program's locale settings.
+ <STRONG>o</STRONG> The input is a printable character. Printable characters (which
+ must be positive, less than 256) are checked according to the
+ program's locale settings.
- <STRONG>o</STRONG> The input is the KEY_MOUSE special key associated with
- an mouse event.
+ <STRONG>o</STRONG> The input is the KEY_MOUSE special key associated with an mouse
+ event.
</PRE><H3><a name="h3-form_driver_w">form_driver_w</a></H3><PRE>
- This extension simplifies the use of the forms library
- using wide characters. The input is either a key code (a
- request) or a wide character returned by <STRONG><A HREF="curs_get_wch.3x.html">get_wch(3x)</A></STRONG>. The
- type must be passed as well, to enable the library to
- determine whether the parameter is a wide character or a
- request.
+ This extension simplifies the use of the forms library using wide
+ characters. The input is either a key code (a request) or a wide
+ character returned by <STRONG><A HREF="curs_get_wch.3x.html">get_wch(3x)</A></STRONG>. The type must be passed as well, to
+ enable the library to determine whether the parameter is a wide
+ character or a request.
-</PRE><H3><a name="h3-Form-driver-requests">Form-driver requests</a></H3><PRE>
+</PRE><H3><a name="h3-Form-Driver-Requests">Form Driver Requests</a></H3><PRE>
The form driver requests are as follows:
- <EM>Name</EM> <EM>Description</EM>
- -------------------------------------------------------------------------
- REQ_BEG_FIELD Move to the beginning of the field.
- REQ_BEG_LINE Move to the beginning of the line.
- REQ_CLR_EOF Clear to end of field from cursor.
- REQ_CLR_EOL Clear to end of line from cursor.
- REQ_CLR_FIELD Clear the entire field.
- REQ_DEL_CHAR Delete character at the cursor.
- REQ_DEL_LINE Delete line at the cursor.
- REQ_DEL_PREV Delete character before the cursor.
- REQ_DEL_WORD Delete blank-delimited word at the cursor.
- REQ_DOWN_CHAR Move down in the field.
- REQ_DOWN_FIELD Move down to a field.
- REQ_END_FIELD Move to the end of the field.
- REQ_END_LINE Move to the end of the line.
- REQ_FIRST_FIELD Move to the first field.
- REQ_FIRST_PAGE Move to the first page.
- REQ_INS_CHAR Insert a blank at the cursor.
- REQ_INS_LINE Insert a blank line at the cursor.
- REQ_INS_MODE Enter insert mode.
- REQ_LAST_FIELD Move to the last field.
- REQ_LAST_PAGE Move to the last field.
- REQ_LEFT_CHAR Move left in the field.
-
- REQ_LEFT_FIELD Move left to a field.
- REQ_NEW_LINE Insert or overlay a new line.
- REQ_NEXT_CHAR Move to the next char.
- REQ_NEXT_CHOICE Display next field choice.
- REQ_NEXT_FIELD Move to the next field.
- REQ_NEXT_LINE Move to the next line.
- REQ_NEXT_PAGE Move to the next page.
- REQ_NEXT_PAGE Move to the next page.
- REQ_NEXT_WORD Move to the next word.
- REQ_OVL_MODE Enter overlay mode.
- REQ_PREV_CHAR Move to the previous char.
- REQ_PREV_CHOICE Display previous field choice.
- REQ_PREV_FIELD Move to the previous field.
- REQ_PREV_LINE Move to the previous line.
- REQ_PREV_PAGE Move to the previous page.
- REQ_PREV_WORD Move to the previous word.
- REQ_RIGHT_CHAR Move right in the field.
- REQ_RIGHT_FIELD Move right to a field.
- REQ_SCR_BCHAR Scroll the field backward a character.
- REQ_SCR_BHPAGE Scroll the field backward half a page.
- REQ_SCR_BLINE Scroll the field backward a line.
- REQ_SCR_BPAGE Scroll the field backward a page.
- REQ_SCR_FCHAR Scroll the field forward a character.
- REQ_SCR_FHPAGE Scroll the field forward half a page.
- REQ_SCR_FLINE Scroll the field forward a line.
- REQ_SCR_FPAGE Scroll the field forward a page.
- REQ_SCR_HBHALF Horizontal scroll the field backward half a line.
- REQ_SCR_HBLINE Horizontal scroll the field backward a line.
- REQ_SCR_HFHALF Horizontal scroll the field forward half a line.
- REQ_SCR_HFLINE Horizontal scroll the field forward a line.
- REQ_SFIRST_FIELD Move to the sorted first field.
- REQ_SLAST_FIELD Move to the sorted last field.
- REQ_SNEXT_FIELD Move to the sorted next field.
- REQ_SPREV_FIELD Move to the sorted previous field.
- REQ_UP_CHAR Move up in the field.
- REQ_UP_FIELD Move up to a field.
- REQ_VALIDATION Validate field.
-
- If the second argument is a printable character, the
- driver places it in the current position in the current
- field. If it is one of the forms requests listed above,
- that request is executed.
-
-
-</PRE><H3><a name="h3-Field-validation">Field validation</a></H3><PRE>
- The form library makes updates to the window associated
- with form fields rather than directly to the field buf-
- fers.
-
- The form driver provides low-level control over updates to
- the form fields. The form driver also provides for vali-
- dating modified fields to ensure that the contents meet
- whatever constraints an application may attach using
- <STRONG>set_field_type</STRONG>.
-
- You can validate a field without making any changes to it
- using <STRONG>REQ_VALIDATION</STRONG>. The form driver also validates a
- field in these cases:
-
- <STRONG>o</STRONG> a call to <STRONG>set_current_field</STRONG> attempts to move to a dif-
- ferent field.
-
- <STRONG>o</STRONG> a call to <STRONG>set_current_page</STRONG> attempts to move to a dif-
- ferent page of the form.
+ <STRONG>Name</STRONG> <STRONG>Description</STRONG>
+ ------------------------------------------------------------------------
+ <STRONG>REQ_BEG_FIELD</STRONG> Move to beginning of field.
+ <STRONG>REQ_BEG_LINE</STRONG> Move to beginning of the line.
+ <STRONG>REQ_CLR_EOF</STRONG> Clear to end of field from cursor.
+ <STRONG>REQ_CLR_EOL</STRONG> Clear to end of line from cursor.
+ <STRONG>REQ_CLR_FIELD</STRONG> Clear the entire field.
+ <STRONG>REQ_DEL_CHAR</STRONG> Delete character at the cursor.
+ <STRONG>REQ_DEL_LINE</STRONG> Delete line at the cursor.
+ <STRONG>REQ_DEL_PREV</STRONG> Delete character before the cursor.
+ <STRONG>REQ_DEL_WORD</STRONG> Delete blank-delimited word at cursor.
+ <STRONG>REQ_DOWN_CHAR</STRONG> Move down in field.
+ <STRONG>REQ_DOWN_FIELD</STRONG> Move down to a field.
+ <STRONG>REQ_END_FIELD</STRONG> Move to the end of field.
+ <STRONG>REQ_END_LINE</STRONG> Move to the end of the line.
+ <STRONG>REQ_FIRST_FIELD</STRONG> Move to the first field.
+ <STRONG>REQ_FIRST_PAGE</STRONG> Move to the first page.
+ <STRONG>REQ_INS_CHAR</STRONG> Insert a blank at the cursor.
+ <STRONG>REQ_INS_LINE</STRONG> Insert a blank line at the cursor.
+ <STRONG>REQ_INS_MODE</STRONG> Enter insert mode.
+ <STRONG>REQ_LAST_FIELD</STRONG> Move to the last field.
+ <STRONG>REQ_LAST_PAGE</STRONG> Move to the last field.
+ <STRONG>REQ_LEFT_CHAR</STRONG> Move left in field.
+ <STRONG>REQ_LEFT_FIELD</STRONG> Move left to a field.
+ <STRONG>REQ_NEW_LINE</STRONG> Insert or overlay a new line.
+ <STRONG>REQ_NEXT_CHAR</STRONG> Move to the next char.
+
+ <STRONG>REQ_NEXT_CHOICE</STRONG> Display next field choice.
+ <STRONG>REQ_NEXT_FIELD</STRONG> Move to the next field.
+ <STRONG>REQ_NEXT_LINE</STRONG> Move to the next line.
+ <STRONG>REQ_NEXT_PAGE</STRONG> Move to the next page.
+ <STRONG>REQ_NEXT_PAGE</STRONG> Move to the next page.
+ <STRONG>REQ_NEXT_WORD</STRONG> Move to the next word.
+ <STRONG>REQ_OVL_MODE</STRONG> Enter overlay mode.
+ <STRONG>REQ_PREV_CHAR</STRONG> Move to the previous char.
+ <STRONG>REQ_PREV_CHOICE</STRONG> Display previous field choice.
+ <STRONG>REQ_PREV_FIELD</STRONG> Move to the previous field.
+ <STRONG>REQ_PREV_LINE</STRONG> Move to the previous line.
+ <STRONG>REQ_PREV_PAGE</STRONG> Move to the previous page.
+ <STRONG>REQ_PREV_WORD</STRONG> Move to the previous word.
+ <STRONG>REQ_RIGHT_CHAR</STRONG> Move right in field.
+ <STRONG>REQ_RIGHT_FIELD</STRONG> Move right to a field.
+ <STRONG>REQ_SCR_BCHAR</STRONG> Scroll field backward 1 character.
+ <STRONG>REQ_SCR_BHPAGE</STRONG> Scroll field backward 1/2 page.
+ <STRONG>REQ_SCR_BLINE</STRONG> Scroll field backward 1 line.
+ <STRONG>REQ_SCR_BPAGE</STRONG> Scroll field backward 1 page.
+ <STRONG>REQ_SCR_FCHAR</STRONG> Scroll field forward 1 character.
+ <STRONG>REQ_SCR_FHPAGE</STRONG> Scroll field forward 1/2 page.
+ <STRONG>REQ_SCR_FLINE</STRONG> Scroll field forward 1 line.
+ <STRONG>REQ_SCR_FPAGE</STRONG> Scroll field forward 1 page.
+ <STRONG>REQ_SCR_HBHALF</STRONG> Horizontal scroll field backward 1/2 line.
+ <STRONG>REQ_SCR_HBLINE</STRONG> Horizontal scroll field backward 1 line.
+ <STRONG>REQ_SCR_HFHALF</STRONG> Horizontal scroll field forward 1/2 line.
+ <STRONG>REQ_SCR_HFLINE</STRONG> Horizontal scroll field forward 1 line.
+ <STRONG>REQ_SFIRST_FIELD</STRONG> Move to the sorted first field.
+ <STRONG>REQ_SLAST_FIELD</STRONG> Move to the sorted last field.
+ <STRONG>REQ_SNEXT_FIELD</STRONG> Move to the sorted next field.
+ <STRONG>REQ_SPREV_FIELD</STRONG> Move to the sorted previous field.
+ <STRONG>REQ_UP_CHAR</STRONG> Move up in field.
+ <STRONG>REQ_UP_FIELD</STRONG> Move up to a field.
+ <STRONG>REQ_VALIDATION</STRONG> Validate field.
+
+ If the second argument is a printable character, the driver places it
+ in the current position in the current field. If it is one of the
+ forms requests listed above, that request is executed.
+
+
+</PRE><H3><a name="h3-Field-Validation">Field Validation</a></H3><PRE>
+ The form library makes updates to the window associated with form
+ fields rather than directly to the field buffers.
+
+ The form driver provides low-level control over updates to the form
+ fields. The form driver also provides for validating modified fields
+ to ensure that the contents meet whatever constraints an application
+ may attach using <STRONG>set_field_type</STRONG>.
+
+ You can validate a field without making any changes to it using
+ <STRONG>REQ_VALIDATION</STRONG>. The form driver also validates a field in these cases:
+
+ <STRONG>o</STRONG> a call to <STRONG>set_current_field</STRONG> attempts to move to a different field.
+
+ <STRONG>o</STRONG> a call to <STRONG>set_current_page</STRONG> attempts to move to a different page of
+ the form.
<STRONG>o</STRONG> a request attempts to move to a different field.
- <STRONG>o</STRONG> a request attempts to move to a different page of the
- form.
+ <STRONG>o</STRONG> a request attempts to move to a different page of the form.
In each case, the move fails if the field is invalid.
- If the modified field is valid, the form driver copies the
- modified data from the window associated with the field to
- the field buffer.
+ If the modified field is valid, the form driver copies the modified
+ data from the window associated with the field to the field buffer.
-</PRE><H3><a name="h3-Mouse-handling">Mouse handling</a></H3><PRE>
- If the second argument is the KEY_MOUSE special key, the
- associated mouse event is translated into one of the above
- pre-defined requests. Currently only clicks in the user
- window (e.g., inside the form display area or the decora-
- tion window) are handled.
+</PRE><H3><a name="h3-Mouse-Handling">Mouse Handling</a></H3><PRE>
+ If the second argument is the KEY_MOUSE special key, the associated
+ mouse event is translated into one of the above pre-defined requests.
+ Currently only clicks in the user window (e.g., inside the form display
+ area or the decoration window) are handled.
If you click above the display region of the form:
a REQ_LAST_FIELD is generated for a triple-click.
- If you click at an field inside the display area of the
- form:
+ If you click at an field inside the display area of the form:
<STRONG>o</STRONG> the form cursor is positioned to that field.
- <STRONG>o</STRONG> If you double-click a field, the form cursor is
- positioned to that field and <STRONG>E_UNKNOWN_COMMAND</STRONG> is
- returned. This return value makes sense, because a
- double click usually means that an field-specific
- action should be returned. It is exactly the pur-
- pose of this return value to signal that an appli-
- cation specific command should be executed.
+ <STRONG>o</STRONG> If you double-click a field, the form cursor is positioned to
+ that field and <STRONG>E_UNKNOWN_COMMAND</STRONG> is returned. This return value
+ makes sense, because a double click usually means that an field-
+ specific action should be returned. It is exactly the purpose
+ of this return value to signal that an application specific
+ command should be executed.
- <STRONG>o</STRONG> If a translation into a request was done,
- <STRONG>form_driver</STRONG> returns the result of this request.
+ <STRONG>o</STRONG> If a translation into a request was done, <STRONG>form_driver</STRONG> returns
+ the result of this request.
- If you clicked outside the user window or the mouse event
- could not be translated into a form request an
- <STRONG>E_REQUEST_DENIED</STRONG> is returned.
+ If you clicked outside the user window or the mouse event could not be
+ translated into a form request an <STRONG>E_REQUEST_DENIED</STRONG> is returned.
-</PRE><H3><a name="h3-Application-defined-commands">Application-defined commands</a></H3><PRE>
- If the second argument is neither printable nor one of the
- above pre-defined form requests, the driver assumes it is
- an application-specific command and returns <STRONG>E_UNKNOWN_COM-</STRONG>
- <STRONG>MAND</STRONG>. Application-defined commands should be defined rel-
- ative to <STRONG>MAX_COMMAND</STRONG>, the maximum value of these pre-
- defined requests.
+</PRE><H3><a name="h3-Application-defined-Commands">Application-defined Commands</a></H3><PRE>
+ If the second argument is neither printable nor one of the above pre-
+ defined form requests, the driver assumes it is an application-specific
+ command and returns <STRONG>E_UNKNOWN_COMMAND</STRONG>. Application-defined commands
+ should be defined relative to <STRONG>MAX_COMMAND</STRONG>, the maximum value of these
+ pre-defined requests.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
<STRONG>E_OK</STRONG> The routine succeeded.
<STRONG>E_BAD_ARGUMENT</STRONG>
- Routine detected an incorrect or out-of-range argu-
- ment.
+ Routine detected an incorrect or out-of-range argument.
<STRONG>E_BAD_STATE</STRONG>
- Routine was called from an initialization or termina-
- tion function.
+ Routine was called from an initialization or termination function.
<STRONG>E_NOT_POSTED</STRONG>
The form has not been posted.
<STRONG>E_INVALID_FIELD</STRONG>
Contents of field is invalid.
+ <STRONG>E_NOT_CONNECTED</STRONG>
+ No fields are connected to the form.
+
<STRONG>E_REQUEST_DENIED</STRONG>
The form driver could not process the request.
<STRONG>E_SYSTEM_ERROR</STRONG>
- System error occurred (see <STRONG>errno</STRONG>).
+ System error occurred (see <STRONG>errno(3)</STRONG>).
<STRONG>E_UNKNOWN_COMMAND</STRONG>
The form driver code saw an unknown request code.
-</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
- <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>, <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>,
- <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>, <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG>, <STRONG>form_vari-</STRONG>
- <STRONG><A HREF="form_variables.3x.html">ables(3x)</A></STRONG>, <STRONG><A HREF="curs_getch.3x.html">getch(3x)</A></STRONG>.
-
-
-</PRE><H2><a name="h2-NOTES">NOTES</a></H2><PRE>
- The header file <STRONG><form.h></STRONG> automatically includes the header
- files <STRONG><curses.h></STRONG>.
-
-
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
- These routines emulate the System V forms library. They
- were not supported on Version 7 or BSD versions.
+ These routines emulate the System V forms library. They were not
+ supported on Version 7 or BSD versions.
</PRE><H2><a name="h2-AUTHORS">AUTHORS</a></H2><PRE>
- Juergen Pfeifer. Manual pages and adaptation for new
- curses by Eric S. Raymond.
+ Juergen Pfeifer. Manual pages and adaptation for new curses by Eric S.
+ Raymond.
+
+
+</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
+ <STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="form.3x.html">form(3x)</A></STRONG>, <STRONG><A HREF="form_fieldtype.3x.html">form_fieldtype(3x)</A></STRONG>, <STRONG><A HREF="form_field_buffer.3x.html">form_field_buffer(3x)</A></STRONG>,
+ <STRONG><A HREF="form_field_validation.3x.html">form_field_validation(3x)</A></STRONG>, <STRONG><A HREF="form_variables.3x.html">form_variables(3x)</A></STRONG>, <STRONG><A HREF="curs_getch.3x.html">getch(3x)</A></STRONG>
- <STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG>
+ncurses 6.4 2024-04-20 <STRONG><A HREF="form_driver.3x.html">form_driver(3x)</A></STRONG>
</PRE>
<div class="nav">
<ul>
<ul>
<li><a href="#h3-form_driver">form_driver</a></li>
<li><a href="#h3-form_driver_w">form_driver_w</a></li>
-<li><a href="#h3-Form-driver-requests">Form-driver requests</a></li>
-<li><a href="#h3-Field-validation">Field validation</a></li>
-<li><a href="#h3-Mouse-handling">Mouse handling</a></li>
-<li><a href="#h3-Application-defined-commands">Application-defined commands</a></li>
+<li><a href="#h3-Form-Driver-Requests">Form Driver Requests</a></li>
+<li><a href="#h3-Field-Validation">Field Validation</a></li>
+<li><a href="#h3-Mouse-Handling">Mouse Handling</a></li>
+<li><a href="#h3-Application-defined-Commands">Application-defined Commands</a></li>
</ul>
</li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
-<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
-<li><a href="#h2-NOTES">NOTES</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-AUTHORS">AUTHORS</a></li>
+<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
</div>
</BODY>