Tk_GetScrollInfo


HOME

Tk_GetScrollInfo

NAME
SYNOPSIS
ARGUMENTS
DESCRIPTION
KEYWORDS

___________________________

NAME

Tk_GetScrollInfo, Tk_GetScrollInfoObj − parse arguments for scrolling commands

SYNOPSIS

#include <tk.h>

int
Tk_GetScrollInfo(
interp, argc, argv, dblPtr, intPtr)

int
Tk_GetScrollInfoObj(
interp, objc, objv, dblPtr, intPtr)

ARGUMENTS

Tcl_Interp *interp (in)

Interpreter to use for error reporting.

int argc (in)

Number of strings in argv array.

const char *argv[] (in)

Argument strings. These represent the entire widget command, of which the first word is typically the widget name and the second word is typically xview or yview.

int objc (in)

Number of Tcl_Obj’s in objv array.

Tcl_Obj *const objv[] (in)

Argument objects. These represent the entire widget command, of which the first word is typically the widget name and the second word is typically xview or yview.

double *dblPtr (out)

Filled in with fraction from moveto option, if any.

int *intPtr (out)

Filled in with line or page count from scroll option, if any. The value may be negative.

______________

DESCRIPTION

Tk_GetScrollInfo parses the arguments expected by widget scrolling commands such as xview and yview. It receives the entire list of words that make up a widget command and parses the words starting with argv[2]. The words starting with argv[2] must have one of the following forms:

moveto fraction
scroll
number units
scroll
number pages

Any of the moveto, scroll, units, and pages keywords may be abbreviated. If argv has the moveto form, TK_SCROLL_MOVETO is returned as result and *dblPtr is filled in with the fraction argument to the command, which must be a proper real value. If argv has the scroll form, TK_SCROLL_UNITS or TK_SCROLL_PAGES is returned and *intPtr is filled in with the number value, which must be a proper integer. If an error occurs in parsing the arguments, TK_SCROLL_ERROR is returned and an error message is left in interp->result.

Tk_GetScrollInfoObj is identical in function to Tk_GetScrollInfo. However, Tk_GetScrollInfoObj accepts Tcl_Obj style arguments, making it more appropriate for use with new development.

KEYWORDS

parse, scrollbar, scrolling command, xview, yview



More Linux Commands

manpages/wcstombs.3.html
wcstombs(3) - convert a wide-character string to a multibyte
If dest is not NULL, the wcstombs() function converts the wide-character string src to a multibyte string starting at dest. At most n bytes are written to dest.

manpages/mysql_table.5.html
mysql_table(5) - Postfix MySQL client configuration.........
mysql_table.5 - The Postfix mail system uses optional tables for address rewriting or mail routing. These tables are usually in dbm or db format. Alternatively,

manpages/gnutls_certificate_free_credentials.3.html
gnutls_certificate_free_credentials(3) - API function.......
This structure is complex enough to manipulate directly thus this helper function is provided in order to free (deallocate) it. This function does not free any

manpages/XtSessionGetToken.3.html
XtSessionGetToken(3) - token management for checkpointing...
The XtSessionGetToken function will return NULL if the checkpoint operation instigated by the session manager is not currently under way. To indicate the comple

manpages/tzset.3.html
tzset(3) - initialize time conversion information (ManPage)
The tzset() function initializes the tzname variable from the TZ environment variable. This function is automatically called by the other time conversion functi

manpages/padsp.1.html
padsp(1) - PulseAudio OSS Wrapper - Linux manual page.......
padsp.1 - padsp starts the specified program and redirects its access to OSS compatible audio devices (/dev/dsp and auxiliary devices) to a PulseAudio sound ser

manpages/ldap_unbind.3.html
ldap_unbind(3) - LDAP bind routines - Linux manual page.....
These routines provide various interfaces to the LDAP bind operation. After an association with an LDAP server is made using ldap_init(3), an LDAP bind operatio

manpages/Tcl_SetEnsembleUnknownHandler.3.html
Tcl_SetEnsembleUnknownHandler(3) - manipulate ensemble comma
An ensemble is a command, bound to some namespace, which consists of a collection of subcommands implemented by other Tcl commands. The first argument to the en

manpages/xml2-config.1.html
xml2-config(1) - script to get information about the install
xml-config is a tool that is used to determine the compile and linker flags that should be used to compile and link programs that use GNOME-XML. OPTIONS xml-con

manpages/aio_cancel.3.html
aio_cancel(3) - cancel an outstanding asynchronous I/O reque
The aio_cancel() function attempts to cancel outstanding asynchronous I/O requests for the file descriptor fd. If aiocbp is NULL, all such requests are canceled

manpages/XkbAddGeomShape.3.html
XkbAddGeomShape(3) - Add a shape to a keyboard geometry.....
XkbAddGeomShape.3 - Xkb provides functions to add a single new element to the top-level keyboard geometry. In each case the num_ * fields of the corresponding s

manpages/gkeytool-4.6.1.html
gkeytool-4.6(1) - Manage private keys and public certificate
Cryptographic credentials, in a Java environment, are usually stored in a Key Store. The Java SDK specifies a Key Store as a persistent container of two types o





We can't live, work or learn in freedom unless the software we use is free.