How to modify this c code to get full GUI interface for Unix Linux ?


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How to modify this c code to get full GUI interface for Unix Linux ?

Hi,

the following code comes from Unix Linux dialog utility project.
Unfortunately, this project is no more actively maintained.
Unix Linux dialog utility is made of widget boxes.
One of them is mixedgauge.c

In the following example I would like to get rid of flickering
when run in compiled version as shell script example
as follows, than I would like to use c programming environment to let me
expose ncurses.h library calls against plain c code, to let me modify it,
starting to build graphical user interface for Unix Linux machine,
showing data transfer, speed, some statistics in the form of gauges
+ some data output input fields,
so I need to combine some of existing widgets into one, of interest to me.

Getting rid of image flickering is a must.

I have already contacted Thomas and 3 other developers of dialog utility.
Thomas responded me 3 times and stopped.
e-mail addresses of 3 other guys are no more valid.

Appeded dialog -h
to let me assess what widget options are valid

[admin@oo root]$ dialog
cdialog (ComeOn Dialog!) version 1.1-20080819
Copyright 2000-2007,2008 Thomas E. Dickey
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

* Display dialog boxes from shell scripts *

Usage: dialog <options> { --and-widget <options> }
where options are "common" options, followed by "box" options

Special options:
[--create-rc "file"]
Common options:
[--ascii-lines] [--aspect <ratio>] [--backtitle <backtitle>]
[--begin <y> <x>] [--cancel-label <str>] [--clear] [--colors]
[--column-separator <str>] [--cr-wrap] [--default-item <str>]
[--defaultno] [--exit-label <str>] [--extra-button]
[--extra-label <str>] [--help-button] [--help-label <str>]
[--help-status] [--ignore] [--input-fd <fd>] [--insecure]
[--item-help] [--keep-tite] [--keep-window] [--max-input <n>]
[--no-cancel] [--no-collapse] [--no-kill] [--no-label <str>]
[--no-lines] [--no-ok] [--no-shadow] [--nook] [--ok-label <str>]
[--output-fd <fd>] [--output-separator <str>] [--print-maxsize]
[--print-size] [--print-version] [--quoted] [--separate-output]
[--separate-widget <str>] [--shadow] [--single-quoted] [--size-err]
[--sleep <secs>] [--stderr] [--stdout] [--tab-correct] [--tab-len <n>]
[--timeout <secs>] [--title <title>] [--trace <file>] [--trim]
[--version] [--visit-items] [--yes-label <str>]
Box options:
--calendar <text> <height> <width> <day> <month> <year>
--checklist <text> <height> <width> <list height> <tag1> <item1> <status1>...
--dselect <directory> <height> <width>
--editbox <file> <height> <width>
--form <text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1>...
--fselect <filepath> <height> <width>
--gauge <text> <height> <width> [<percent>]
--infobox <text> <height> <width>
--inputbox <text> <height> <width> [<init>]
--inputmenu <text> <height> <width> <menu height> <tag1> <item1>...
--menu <text> <height> <width> <menu height> <tag1> <item1>...
--mixedform <text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1> <itype>...
--mixedgauge <text> <height> <width> <percent> <tag1> <item1>...
--msgbox <text> <height> <width>
--passwordbox <text> <height> <width> [<init>]
--passwordform <text> <height> <width> <form height> <label1> <l_y1> <l_x1> <item1> <i_y1> <i_x1> <flen1> <ilen1>...
--pause <text> <height> <width> <seconds>
--progressbox <height> <width>
--radiolist <text> <height> <width> <list height> <tag1> <item1> <status1>...
--tailbox <file> <height> <width>
--tailboxbg <file> <height> <width>
--textbox <file> <height> <width>
--timebox <text> <height> <width> <hour> <minute> <second>
--yesno <text> <height> <width>

Auto-size with height and width = 0. Maximize with height and width = -1.
Global-auto-size if also menu_height/list_height = 0.
[admin@oo root]$

------------------

Jack

#! /bin/sh
# $Id: mixedgauge,v 1.4 2007/02/26 23:10:30 tom Exp $
: ${DIALOG=dialog}
background="An Example of --mixedgauge usage"

for i in 5 10 20 30 40 50 60 70 80 90 100
do
$DIALOG --begin 5 5 \
--backtitle "$background" \
--title "Mixed gauge demonstration" \
--mixedgauge "This is a prompt message,\nand this is the second line." \
0 0 33 \
"Process one" "0" \
"Process two" "1" \
"Process three" "2" \
"Process four" "3" \
"" "8" \
"Process five" "5" \
"Process six" "6" \
"Process seven" "7" \
"Process eight" "4" \
"Process nine" "-$i"
# break
sleep 1

$DIALOG --begin 15 15 \
--backtitle "$background" \
--title "Mixed gauge demonstration" \
--mixedgauge "This is a prompt message,\nand this is the second line." \
0 0 33 \
"Process one" "0" \
"Process two" "1" \
"Process three" "2" \
"Process four" "3" \
"" "8" \
"Process five" "5" \
"Process six" "6" \
"Process seven" "7" \
"Process eight" "4" \
"Process nine" "-$i"
# break
# sleep 1

----------------
source code

/*
* $Id: mixedgauge.c,v 1.17 2007/09/30 21:14:38 tom Exp $
*
* mixedgauge.c -- implements the mixedgauge dialog
*
* Copyright 2007 Thomas E. Dickey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License, version 2.1
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to
* Free Software Foundation, Inc.
* 51 Franklin St., Fifth Floor
* Boston, MA 02110, USA.
*
* This is inspired by a patch from Kiran Cherupally
* (but different interface design).
*/

#include <dialog.h>

#define LLEN(n) ((n) * MIXEDGAUGE_TAGS)
#define ItemData(i) &items[LLEN(i)]
#define ItemName(i) items[LLEN(i)]
#define ItemText(i) items[LLEN(i) + 1]

#define MIN_HIGH (4)
#define MIN_WIDE (10 + 2 * (2 + MARGIN))

typedef struct {
WINDOW *dialog;
WINDOW *caption;
const char *title;
char *prompt;
int height, old_height, min_height;
int width, old_width, min_width;
int len_name, len_text;
int item_no;
DIALOG_LISTITEM *list;
} DIALOG_MIXEDGAUGE;

static char *
status_string(char *given, bool * freeMe)
{
char *result;

*freeMe = FALSE;
if (isdigit(UCH(*given))) {
switch (*given) {
case '0':
result = _("Succeeded");
break;
case '1':
result = _("Failed");
break;
case '2':
result = _("Passed");
break;
case '3':
result = _("Completed");
break;
case '4':
result = _("Checked");
break;
case '5':
result = _("Done");
break;
case '6':
result = _("Skipped");
break;
case '7':
result = _("In Progress");
break;
case '8':
result = "";
break;
case '9':
result = _("N/A");
break;
default:
result = "?";
break;
}
} else if (*given == '-') {
unsigned need = strlen(++given);
char *temp = dlg_malloc(char, need);
*freeMe = TRUE;
sprintf(temp, "%3s%%", given);
result = temp;
} else if (!isspace(UCH(*given))) {
result = given;
} else {
result = 0;
}
return result;
}

/* This function displays status messages */
static void
myprint_status(DIALOG_MIXEDGAUGE * dlg)
{
WINDOW *win = dlg->dialog;
int limit_y = dlg->height;
int limit_x = dlg->width;

int y = MARGIN;
int item;
int cells = dlg->len_text - 2;
int rm = limit_x; /* right margin */
int lm = limit_x - dlg->len_text - 1;
int bm = limit_y; /* bottom margin */
int last_y = 0, last_x = 0;
int j, xxx;
float percent;
char *status = "";
bool freeMe;

if (win) {
rm -= (2 * MARGIN);
bm -= (2 * MARGIN);
}
if (win != 0)
getyx(win, last_y, last_x);
for (item = 0; item < dlg->item_no; ++item) {
chtype attr = A_NORMAL;

y = item + MARGIN + 1;
if (y > bm)
break;

status = status_string(dlg->list[item].text, &freeMe);
if (status == 0 || *status == 0)
continue;

(void) wmove(win, y, 2 * MARGIN);
dlg_print_text(win, dlg->list[item].name, lm, &attr);

(void) wmove(win, y, lm);
(void) waddch(win, '[');
(void) wmove(win, y, lm + (cells - strlen(status)) / 2);
if (freeMe) {
(void) wmove(win, y, lm + 1);
wattrset(win, title_attr);
for (j = 0; j < cells; j++)
(void) waddch(win, ' ');

(void) wmove(win, y, lm + (cells - strlen(status)) / 2);
(void) waddstr(win, status);

if ((title_attr & A_REVERSE) != 0) {
wattroff(win, A_REVERSE);
} else {
wattrset(win, A_REVERSE);
}
(void) wmove(win, y, lm + 1);

if (sscanf(status, "%f%%", &percent) != 1)
percent = 0.0;
xxx = (int) ((cells * (percent + 0.5)) / 100.0);
for (j = 0; j < xxx; j++) {
chtype ch1 = winch(win);
if (title_attr & A_REVERSE) {
ch1 &= ~A_REVERSE;
}
(void) waddch(win, ch1);
}
free(status);

} else {
(void) wmove(win, y, lm + (cells - strlen(status)) / 2);
(void) waddstr(win, status);
}
(void) wmove(win, y, limit_x - 3);
(void) waddch(win, ']');
(void) wnoutrefresh(win);
}
}

static void
mydraw_mixed_box(WINDOW *win, int y, int x, int height, int width,
chtype boxchar, chtype borderchar)
{
dlg_draw_box(win, y, x, height, width, boxchar, borderchar);
{
chtype attr = A_NORMAL;
char *message = _("Overall Progress");
chtype save2 = getattrs(win);
wattrset(win, title_attr);
(void) wmove(win, y, x + 2);
dlg_print_text(win, message, width, &attr);
wattrset(win, save2);
}
}

static char *
clean_copy(const char *string)
{
char *result = dlg_strclone(string);

dlg_trim_string(result);
dlg_tab_correct_str(result);
return result;
}

/*
* Update mixed-gauge dialog (may be from pipe, may be via direct calls).
*/
static void
dlg_update_mixedgauge(DIALOG_MIXEDGAUGE * dlg, int percent)
{
int i, x;

/*
* Clear the area for the progress bar by filling it with spaces
* in the title-attribute, and write the percentage with that
* attribute.
*/
(void) wmove(dlg->dialog, dlg->height - 3, 4);
wattrset(dlg->dialog, title_attr);

for (i = 0; i < (dlg->width - 2 * (3 + MARGIN)); i++)
(void) waddch(dlg->dialog, ' ');

(void) wmove(dlg->dialog, dlg->height - 3, (dlg->width / 2) - 2);
(void) wprintw(dlg->dialog, "%3d%%", percent);

/*
* Now draw a bar in reverse, relative to the background.
* The window attribute was useful for painting the background,
* but requires some tweaks to reverse it.
*/
x = (percent * (dlg->width - 2 * (3 + MARGIN))) / 100;
if ((title_attr & A_REVERSE) != 0) {
wattroff(dlg->dialog, A_REVERSE);
} else {
wattrset(dlg->dialog, A_REVERSE);
}
(void) wmove(dlg->dialog, dlg->height - 3, 4);
for (i = 0; i < x; i++) {
chtype ch = winch(dlg->dialog);
if (title_attr & A_REVERSE) {
ch &= ~A_REVERSE;
}
(void) waddch(dlg->dialog, ch);
}
myprint_status(dlg);
}

/*
* Setup dialog.
*/
static void
dlg_begin_mixedgauge(DIALOG_MIXEDGAUGE * dlg,
int *began,
const char *aTitle,
const char *aPrompt,
int aHeight,
int aWidth,
int aItemNo,
char **items)
{
int n, y, x;

if (!*began) {
curs_set(0);

memset(dlg, 0, sizeof(*dlg));
dlg->title = aTitle;
dlg->prompt = clean_copy(aPrompt);
dlg->height = dlg->old_height = aHeight;
dlg->width = dlg->old_width = aWidth;
dlg->item_no = aItemNo;

dlg->list = dlg_calloc(DIALOG_LISTITEM, aItemNo);
assert_ptr(dlg->list, "dialog_mixedgauge");

dlg->len_name = 0;
dlg->len_text = 15;

for (n = 0; n < aItemNo; ++n) {
int thisWidth = strlen(ItemName(n));
if (dlg->len_name < thisWidth)
dlg->len_name = thisWidth;
dlg->list[n].name = ItemName(n);
dlg->list[n].text = ItemText(n);
}

dlg->min_height = MIN_HIGH + aItemNo;
dlg->min_width = MIN_WIDE + dlg->len_name + GUTTER + dlg->len_text;

if (dlg->prompt != 0 && *(dlg->prompt) != 0)
dlg->min_height += (2 * MARGIN);
#ifdef KEY_RESIZE
nodelay(stdscr, TRUE);
#endif
}
#ifdef KEY_RESIZE
else {
dlg_del_window(dlg->dialog);
dlg->height = dlg->old_height;
dlg->width = dlg->old_width;
}
#endif

dlg_auto_size(dlg->title, dlg->prompt,
&(dlg->height),
&(dlg->width),
dlg->min_height,
dlg->min_width);
dlg_print_size(dlg->height, dlg->width);
dlg_ctl_size(dlg->height, dlg->width);

/* center dialog box on screen */
x = dlg_box_x_ordinate(dlg->width);
y = dlg_box_y_ordinate(dlg->height);

dlg->dialog = dlg_new_window(dlg->height, dlg->width, y, x);

(void) werase(dlg->dialog);
dlg_draw_box(dlg->dialog,
0, 0,
dlg->height,
dlg->width,
dialog_attr, border_attr);

dlg_draw_title(dlg->dialog, dlg->title);

if ((dlg->prompt != 0 && *(dlg->prompt) != 0)
&& wmove(dlg->dialog, dlg->item_no, 0) != ERR) {
dlg->caption = dlg_sub_window(dlg->dialog,
dlg->height - dlg->item_no - (2 * MARGIN),
dlg->width,
y + dlg->item_no + (2 * MARGIN),
x);
wattrset(dlg->caption, dialog_attr);
dlg_print_autowrap(dlg->caption, dlg->prompt, dlg->height, dlg->width);
}

mydraw_mixed_box(dlg->dialog,
dlg->height - 4,
2 + MARGIN,
2 + MARGIN,
dlg->width - 2 * (2 + MARGIN),
dialog_attr,
border_attr);

*began += 1;
}

/*
* Discard the mixed-gauge dialog.
*/
static int
dlg_finish_mixedgauge(DIALOG_MIXEDGAUGE * dlg, int status)
{
(void) wrefresh(dlg->dialog);
#ifdef KEY_RESIZE
nodelay(stdscr, FALSE);
#endif
curs_set(1);
dlg_del_window(dlg->dialog);
return status;
}

/*
* Setup dialog, read mixed-gauge data from pipe.
*/
int
dialog_mixedgauge(const char *title,
const char *cprompt,
int height,
int width,
int percent,
int item_no,
char **items)
{
DIALOG_MIXEDGAUGE dlg;
int began = 0;

dlg_begin_mixedgauge(&dlg, &began, title, cprompt, height,
width, item_no, items);

dlg_update_mixedgauge(&dlg, percent);

return dlg_finish_mixedgauge(&dlg, DLG_EXIT_OK);
}
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