[unix-history] / usr / src / lib / libcurses / PSD.doc / ex2.c

.\" Copyright (c) 1992, 1993
.\"	 The Regents of the University of California.  All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\" 3. All advertising materials mentioning features or use of this software
.\"    must display the following acknowledgement:
.\"	This product includes software developed by the University of
.\"	California, Berkeley and its contributors.
.\" 4. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\"     @(#)ex2.c	8.1 (Berkeley) 6/8/93
.\"
#include <curses.h>
#include <stdio.h>
#include <signal.h>

#define YSIZE LINES
#define XSIZE COLS

static int quit();

/*
 * This program fills the screen up with characters and the allows the user to
 * manipulate the text on the screen using some basic commands.
 * Nothing fancy, just a demonstration of the elementary features of the
 * curses(3) package.
 */
main()
{
	int i, j, c, n, d = 0;
	char id[100];
	int hh = 0;
	int curx, cury, base, arg;
	
	initscr();
	signal(SIGINT, quit);
	crmode();
	noecho();
	nonl();
	delwin(stdscr);
	stdscr = newwin(YSIZE, XSIZE, 0, 0);
	flushok(stdscr, TRUE);
	scrollok(stdscr, TRUE);
	erase();
	refresh();

	move(0,0);
	refresh();
	for (i = 0; i < YSIZE + 2; i++) {
		sprintf(id, "%d: ", i);
		addstr(id);
		for (j = 0; j < XSIZE - strlen(id); j++)
			addch('0' + (i % 10));
	}
	c = getchar();
	base = 2;
	curx = cury = 0;
	move(0, 0);
	refresh();

	/*
	 * The screen manipulator has the following commands:
	 * 'D' - clear to the end of the current line.
	 * 'B' - clear to the bottom of the screen.
	 * 'E' - erase the screen.
	 * 's' - enter standout mode.
	 * 'e' - exit standout mode.
	 * 'd' n - delete n lines below cursor line.
	 * 'i' n - insert n lines below cursor line.
	 * 'q' - quit.
	 * 'f' - move cursor one position to the right.
	 * 'b' - move cursor one position to the left.
	 * 'n' - move cursor one line down.
	 * 'p' - move cursor one line up.
	 * 'h' - home cusor.
	 * 'l' - force refresh.
	 * 'r' - simulate a carriage return.
	 *
	 * All other characters are ignored.
	 */
	for(;;) {
		switch(c = getchar()) {
		case 'D':
			clrtoeol();
			refresh();
			continue;
		case 'B':
			clrtobot();
			refresh();
			continue;
		case 'E':
			erase();
			refresh();
			continue;
		case 's':
			standout();
			continue;
		case 'e':
			standend();
			continue;
		case 'd':
			arg = getchar() - '0';
			for (i = 0; i < arg; i++)
				deleteln();
			refresh();
			continue;
		case 'i':
			arg = getchar() - '0';
			for (i = 0; i < arg; i++)
				insertln();
			refresh();
			continue;
		case 'q':
			quit();
		case 'f':
			if (curx < XSIZE - 1)
				curx++;
			else {
				cury++;
				curx = 0;
			}
			break;
		case 'b':
			if (curx == 0) {
				cury--;
				curx = XSIZE - 1;
			} else
				curx--;
			break;
		case 'n':
			cury++;
			break;
		case 'p':
			cury--;
			break;
		case 'h':
			curx = cury = 0;
			break;
		case 'l':
			wrefresh(curscr);
			continue;
		case 'r':   /* return */
		{
			int x, y;
			getyx(stdscr, y, x);
			move(y+1, 0);
			insertln();
			move(y, x);
			clrtoeol();
			refresh();
			continue;
		}
		default:
			continue;
		}

		if (cury < 0) {
			base--;
			move(0, 0);
			insertln();
			sprintf(id, "%d: ", base);
			addstr(id);
			for (j = 0; j < XSIZE - strlen(id) - 2; j++) 
				addch('0' + (base % 10));
			cury++;
		} else if (cury >= YSIZE) {
			move(0, 0);
			deleteln();
			move(YSIZE - 1, 0);
			sprintf(id, "%d: ", base + YSIZE);
			addstr(id);
			for (j = 0; j < XSIZE - strlen(id) - 2; j++)
				addch('0' + ((base + YSIZE) % 10));
			cury--;
			base++;
		}
		move(cury, curx);
		refresh();
	}
}

int
quit()
{
	erase();
	refresh();
	endwin();
	exit(0);
}
Commit	Line	Data
ad787160 C	1	.\" Copyright (c) 1992, 1993
ad787160 C	2	.\" The Regents of the University of California. All rights reserved.
00f9495f	3	.\"
ad787160 C	4	.\" Redistribution and use in source and binary forms, with or without
	5	.\" modification, are permitted provided that the following conditions
	6	.\" are met:
	7	.\" 1. Redistributions of source code must retain the above copyright
	8	.\" notice, this list of conditions and the following disclaimer.
	9	.\" 2. Redistributions in binary form must reproduce the above copyright
	10	.\" notice, this list of conditions and the following disclaimer in the
	11	.\" documentation and/or other materials provided with the distribution.
	12	.\" 3. All advertising materials mentioning features or use of this software
	13	.\" must display the following acknowledgement:
	14	.\" This product includes software developed by the University of
	15	.\" California, Berkeley and its contributors.
	16	.\" 4. Neither the name of the University nor the names of its contributors
	17	.\" may be used to endorse or promote products derived from this software
	18	.\" without specific prior written permission.
00f9495f	19	.\"
ad787160 C	20	.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	21	.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	23	.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	24	.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	25	.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	26	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	27	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	28	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	29	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	30	.\" SUCH DAMAGE.
	31	.\"
	32	.\" @(#)ex2.c 8.1 (Berkeley) 6/8/93
00f9495f EA	33	.\"
	34	#include <curses.h>
	35	#include <stdio.h>
	36	#include <signal.h>
	37
	38	#define YSIZE LINES
	39	#define XSIZE COLS
	40
	41	static int quit();
	42
	43	/*
	44	* This program fills the screen up with characters and the allows the user to
	45	* manipulate the text on the screen using some basic commands.
	46	* Nothing fancy, just a demonstration of the elementary features of the
	47	* curses(3) package.
	48	*/
	49	main()
	50	{
	51	int i, j, c, n, d = 0;
	52	char id[100];
	53	int hh = 0;
	54	int curx, cury, base, arg;
	55
	56	initscr();
	57	signal(SIGINT, quit);
	58	crmode();
	59	noecho();
	60	nonl();
	61	delwin(stdscr);
	62	stdscr = newwin(YSIZE, XSIZE, 0, 0);
	63	flushok(stdscr, TRUE);
	64	scrollok(stdscr, TRUE);
	65	erase();
	66	refresh();
	67
	68	move(0,0);
	69	refresh();
	70	for (i = 0; i < YSIZE + 2; i++) {
	71	sprintf(id, "%d: ", i);
	72	addstr(id);
	73	for (j = 0; j < XSIZE - strlen(id); j++)
	74	addch('0' + (i % 10));
	75	}
	76	c = getchar();
	77	base = 2;
	78	curx = cury = 0;
	79	move(0, 0);
	80	refresh();
	81
	82	/*
	83	* The screen manipulator has the following commands:
	84	* 'D' - clear to the end of the current line.
	85	* 'B' - clear to the bottom of the screen.
	86	* 'E' - erase the screen.
	87	* 's' - enter standout mode.
	88	* 'e' - exit standout mode.
	89	* 'd' n - delete n lines below cursor line.
	90	* 'i' n - insert n lines below cursor line.
	91	* 'q' - quit.
	92	* 'f' - move cursor one position to the right.
	93	* 'b' - move cursor one position to the left.
	94	* 'n' - move cursor one line down.
	95	* 'p' - move cursor one line up.
	96	* 'h' - home cusor.
97	* 'l' - force refresh.
98	* 'r' - simulate a carriage return.
99	*
100	* All other characters are ignored.
101	*/
102	for(;;) {
103	switch(c = getchar()) {
104	case 'D':
105	clrtoeol();
106	refresh();
107	continue;
108	case 'B':
109	clrtobot();
110	refresh();
111	continue;
112	case 'E':
113	erase();
114	refresh();
115	continue;
116	case 's':
117	standout();
118	continue;
119	case 'e':
120	standend();
121	continue;
122	case 'd':
123	arg = getchar() - '0';
124	for (i = 0; i < arg; i++)
125	deleteln();
126	refresh();
127	continue;
128	case 'i':
129	arg = getchar() - '0';
130	for (i = 0; i < arg; i++)
131	insertln();
132	refresh();
133	continue;
134	case 'q':
135	quit();
136	case 'f':
137	if (curx < XSIZE - 1)
138	curx++;
139	else {
140	cury++;
141	curx = 0;
142	}
143	break;
144	case 'b':
145	if (curx == 0) {
146	cury--;
147	curx = XSIZE - 1;
148	} else
149	curx--;
150	break;
151	case 'n':
152	cury++;
153	break;
154	case 'p':
155	cury--;
156	break;
157	case 'h':
158	curx = cury = 0;
159	break;
160	case 'l':
161	wrefresh(curscr);
162	continue;
163	case 'r': /* return */
164	{
165	int x, y;
166	getyx(stdscr, y, x);
167	move(y+1, 0);
168	insertln();
169	move(y, x);
170	clrtoeol();
171	refresh();
172	continue;
173	}
174	default:
175	continue;
176	}
177
178	if (cury < 0) {
179	base--;
180	move(0, 0);
181	insertln();
182	sprintf(id, "%d: ", base);
183	addstr(id);
184	for (j = 0; j < XSIZE - strlen(id) - 2; j++)
185	addch('0' + (base % 10));
186	cury++;
187	} else if (cury >= YSIZE) {
188	move(0, 0);
189	deleteln();
190	move(YSIZE - 1, 0);
191	sprintf(id, "%d: ", base + YSIZE);
192	addstr(id);
193	for (j = 0; j < XSIZE - strlen(id) - 2; j++)
194	addch('0' + ((base + YSIZE) % 10));
195	cury--;
196	base++;
197	}
198	move(cury, curx);
199	refresh();
200	}
201	}
202
203	int
204	quit()
205	{
206	erase();
207	refresh();
208	endwin();
209	exit(0);
210	}