375 lines
9.0 KiB
Groff
375 lines
9.0 KiB
Groff
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'\" t
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.\" $Id: cdk_util.3,v 1.10 2016/12/11 01:32:30 tom Exp $
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.de bP
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.IP \(bu 4
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..
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.de XX
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..
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.TH cdk_util 3
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.SH NAME
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.XX CDKgetDirectoryContents
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.XX CDKreadFile
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.XX alignxy
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.XX char2Chtype
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.XX char2DisplayType
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.XX checkForLink
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.XX chtype2String
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.XX deleteCursesWindow
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.XX eraseCursesWindow
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.XX getListIndex
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.XX getString
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.XX justifyString
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.XX mode2Filetype
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.XX moveCursesWindow
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.XX popupDialog
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.XX popupLabel
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.XX popupLabelAttrib
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.XX selectFile
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.XX setWidgetDimension
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.XX stripWhiteSpace
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.XX viewFile
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.XX viewInfo
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cdk_util \- Cdk utility functions
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.SH SYNOPSIS
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.LP
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.B cc
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.RI "[ " "flag" " \|.\|.\|. ] " "file" " \|.\|.\|."
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.B \-lcdk
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.RI "[ " "library" " \|.\|.\|. ]"
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.LP
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#include <cdk.h>
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.nf
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.TP 15
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.B "int CDKgetDirectoryContents ("
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.BI "const char *" "directory",
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.BI "char ***" "list");
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.TP 15
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.B "int CDKreadFile ("
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.BI "const char *" "filename",
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.BI "char ***" "info");
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.TP 15
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.B "void alignxy ("
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.BI "WINDOW *" "window",
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.BI "int *" "xpos",
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.BI "int *" "ypos",
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.BI "int " "boxWidth",
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.BI "int " "boxHeight");
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.TP 15
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.B "chtype *char2Chtype ("
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.BI "const char *" "string",
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.BI "int *" "length",
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.BI "int *" "align");
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.TP 15
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.B "EDisplayType char2DisplayType ("
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.BI "const char *" "string");
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.TP 15
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.B "int checkForLink ("
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.BI "const char *" "line",
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.BI "char *" "filename");
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.TP 15
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.B "char *chtype2String (
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.BI "const chtype *" "string");
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.TP 15
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.B "void deleteCursesWindow ("
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.BI "WINDOW *" "window");
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.TP 15
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.B "void eraseCursesWindow ("
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.BI "WINDOW *" "window");
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.TP 15
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.B "int getListIndex ("
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.BI "CDKSCREEN *" "screen",
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.BI "const char *" "title",
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.BI "CDK_CONST char **" "list",
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.BI "int " "listSize",
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.BI "boolean " "numbers");
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.TP 15
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.B char *getString ("
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.BI "CDKSCREEN *" "screen",
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.BI "const char *" "title",
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.BI "const char *" "label",
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.BI "const char *" "init");
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.TP 15
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.B "int justifyString ("
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.BI "int " "fieldWidth",
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.BI "int " "mesglen",
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.BI "int " "justify");
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.TP 15
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.B "int mode2Filetype ("
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.BI "mode_t " "fileMode");
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.TP 15
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.B "void moveCursesWindow ("
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.BI "WINDOW *" "window",
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.BI "int " "xdiff",
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.BI "int " "ydiff");
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.TP 15
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.B "int popupDialog ("
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.BI "CDKSCREEN *" "screen",
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.BI "CDK_CONST char **" "mesg",
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.BI "int " "mesgCount",
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.BI "CDK_CONST char **" "buttons",
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.BI "int " "buttonCount");
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.TP 15
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.B "void popupLabel ("
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.BI "CDKSCREEN *" "win",
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.BI "CDK_CONST char **" "mesg",
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.BI "int " "count");
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.TP 15
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.B "void popupLabelAttrib ("
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.BI "CDKSCREEN *" "win",
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.BI "CDK_CONST char **" "mesg",
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.BI "int " "count",
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.BI "chtype " "attribute");
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.TP 15
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.B "char *selectFile ("
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.BI "CDKSCREEN *" "screen",
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.BI "const char *" "title");
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.TP 15
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.B "int setWidgetDimension ("
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.BI "int " "parentDim",
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.BI "int " "proposedDim",
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.BI "int " "adjustment");
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.TP 15
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.B "void stripWhiteSpace ("
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.BI "EStripType " "stripType",
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.BI "char *" "string");
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.TP 15
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.B "int viewFile ("
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.BI "CDKSCREEN *" "screen",
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.BI "const char *" "title",
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.BI "const char *" "filename",
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.BI "CDK_CONST char **" "buttons",
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.BI "int " "buttonCount");
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.TP 15
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.B "int viewInfo ("
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.BI "CDKSCREEN *" "screen",
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.BI "const char *" "title",
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.BI "CDK_CONST char **" "info",
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.BI "int " "size",
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.BI "CDK_CONST char **" "buttons",
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.BI "int " "buttonCount",
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.BI "boolean " "interpret");
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.fi
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.SH DESCRIPTION
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These are utility functions that one may use to initialize,
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build or customize widgets.
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.
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.SH AVAILABLE FUNCTIONS
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.TP 5
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.B CDKgetDirectoryContents
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opens and reads the contents of the given directory, filling
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the array \fBlist\fR with the sorted contents of the directory.
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If the directory cannot be opened then it returns a value of -1.
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.TP 5
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.B CDKreadFile
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Read the file \fIfilename\fP,
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load the contents into a dynamically allocated array,
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storing its address via \fIinfo\fP.
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It returns the number of lines
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read if the file could be opened, -1 otherwise.
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.TP 5
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.B alignxy
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Aligns a box on the given \fIwindow\fP with the height and width given.
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See cdk_position (3) for the interpretation of the
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\fIxpos\fP,
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\fIypos\fP,
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\fIboxWidth\fP and
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\fIboxHeight\fP,
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parameters.
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.TP 5
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.B char2Chtype
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Translate a character \fIstring\fP with embedded format markers
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(e.g., "</X/Y>Blah Blah")
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to a null-terminated array of chtype's.
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.RS
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.bP
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The length of the array is stored via the \fIlength\fP parameter.
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.bP
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The \fBalign\fR parameter contains justification information
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(LEFT, CENTER, RIGHT).
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.IP
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The caller is responsible for freeing the result.
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.RE
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.TP 5
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.B char2DisplayType
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Lookup the given name in \fIstring\fP and return the equivalent display type.
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See also cdk_display (3).
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.TP 5
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.B checkForLink
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Check if the given \fIline\fP is of the form
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.RS
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<F=\fIfilename\fP>
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.RE
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.IP
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If so, extract the filename from the line, storing it in the \fIfilename\fP
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buffer (which must hold at least CDK_PATHMAX characters).
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Return nonzero if a filename is extracted.
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.TP 5
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.B chtype2String
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Extract the characters and formatting information
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from a null-terminated array of chtype's \fIstring\fP.
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A dynamically allocated string is returned.
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.TP 5
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.B deleteCursesWindow
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Safely delete a given window,
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i.e., first check if the \fIwindow\fP parameter is nonnull.
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.TP 5
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.B eraseCursesWindow
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Safely erase a given window,
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i.e., first check if the \fIwindow\fP parameter is nonnull.
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.TP 5
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.B getListIndex
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Display a scrollable list of strings in a dialog,
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allow the user to select one.
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Return the index in the list of the value selected.
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.RS
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.bP
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The \fIlist\fP parameter contains the strings to display;
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there are \fIlistSize\fP strings in the list.
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.bP
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If \fInumbers\fP is true, the displayed list items will be numbered.
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.RE
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.TP 5
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.B getString
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pops up an entry widget with
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.RS
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.bP
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a title supplied by the value
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of the \fBtitle\fR parameter,
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.bP
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a label supplied by the \fBlabel\fR parameter,
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and
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.bP
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an initial value supplied by the \fBinitialValue\fR parameter.
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.RE
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.IP
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It returns
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a pointer to the value typed in or NULL if the widget was exited early.
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.TP 5
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.B justifyString
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Given a string length \fImesglen\fP,
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the available field width \fIfieldWidth\fP
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and a justification type \fIjustify\fP,
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return the number of characters by which to shift the string.
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.TP 5
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.B mode2Filetype
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Given a file protection mode \fIfileMode\fP,
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return ignoring the file-type bits,
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i.e., ignoring the corresponding permissions data.
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.TP 5
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.B moveCursesWindow
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Move a given \fIwindow\fP by the amounts in \fIxdiff\fP and \fIydiff\fP.
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.TP 5
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.B popupDialog
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creates a quick pop-up dialog box.
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Pass in
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.RS
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.bP
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the message in the \fBmesg\fR parameter,
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.bP
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the size of the message in the \fBmesgCount\fR parameter,
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.bP
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the button labels in the \fBbuttons\fR parameter and
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.bP
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the number of buttons in the \fBbuttonCount\fR parameter.
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.RE
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.IP
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The dialog box will be centered on the screen.
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.TP 5
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.B popupLabel
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creates a quick pop-up label widget.
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.IP
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The message and the size of
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the message are passed in via the \fBmesg\fR and \fBcount\fR parameters respectively.
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.IP
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The label widget waits until the user hits a character and is centered
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on the screen.
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.TP 5
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.B popupLabelAttrib
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Display a simple dialog with
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a list of \fIcount\fP message strings \fImesg\fP.
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Use the given \fIattribute\fP for the background of the dialog.
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.TP 5
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.B selectFile
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Display a file-selection dialog.
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Return the selected filename, or null if none is selected.
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The caller should free the return-value.
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.TP 5
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.B setWidgetDimension
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This is a helper function used to set the height/width of a widget:
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.RS
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.bP
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If the proposed dimension \fIproposedDim\fP is FULL or zero,
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the return value will be \fIparentDim\fP.
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.bP
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If the proposed dimension \fIproposedDim\fP is positive,
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.RS
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.bP
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and it is larger than \fIparentDim\fP, return \fIproposedDim\fP,
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.bP
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otherwise return \fIproposedDim\fP plus \fIadjustment\fP.
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.RE
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.bP
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If the proposed dimension \fIproposedDim\fP is negative,
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the return value will be \fIparentDim\fP plus \fIproposedDim\fP.
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.bP
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Otherwise, the return value will be \fIproposedDim\fP.
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.RE
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.TP 5
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.B stripWhiteSpace
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Strip whitespace from the front and/or back of the given \fIstring\fP.
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.IP
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The \fIstripType\fP parameter controls the type of stripping done:
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vFRONT, vBACK or vBOTH.
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.TP 5
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.B viewFile
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Read the file specified by \fIfilename\fP and display it in a CDKVIEWER window.
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The \fItitle\fP, \fIbuttons\fP and \fIbuttonCount\fP are applied to the
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CDKVIEWER window.
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.RS
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.bP
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The viewer shows
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the contents of the file supplied by the \fBfilename\fR value.
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.bP
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The buttons on
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the file viewer are supplied by the \fBbuttons\fR parameter.
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.RE
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.IP
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It returns the index of the button selected,
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or -1 if the file does not exist or if the widget was exited early.
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.LP
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.TS
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center tab(/) allbox;
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l l
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l l
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lw15 lw35 .
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\fBStrip_Type/Result\fR
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=
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vFRONT/T{
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This tells the function to remove
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all of the white space from the
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front of the given string.
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T}
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vBACK/T{
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This tells the function to remove
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all of the white space from the
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back of the given string.
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T}
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vBOTH/T{
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This tells the function to remove
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all of the white space from both
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the front and the back of the given string.
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T}
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.TE
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.TP 5
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.B viewInfo
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Display the list of strings in \fIinfo\fP in a CDKVIEWER window.
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The number of strings is given by \fIsize\fP.
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The \fItitle\fP, \fIbuttons\fP and \fIbuttonCount\fP are applied to the
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CDKVIEWER window.
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.
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.SH SEE ALSO
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cdk_dialog (3),
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cdk_display (3),
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cdk_position (3),
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cdk_misc (3).
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