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gplt_x11.c
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gplt_x11.c
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#ifndef lint
static char *RCSid = "$Id: gplt_x11.c,v 1.10 1998/10/01 10:59:50 lhecking Exp $";
#endif
/* GNUPLOT - gplt_x11.c */
/*[
* Copyright 1986 - 1993, 1998 Thomas Williams, Colin Kelley
*
* Permission to use, copy, and distribute this software and its
* documentation for any purpose with or without fee is hereby granted,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation.
*
* Permission to modify the software is granted, but not the right to
* distribute the complete modified source code. Modifications are to
* be distributed as patches to the released version. Permission to
* distribute binaries produced by compiling modified sources is granted,
* provided you
* 1. distribute the corresponding source modifications from the
* released version in the form of a patch file along with the binaries,
* 2. add special version identification to distinguish your version
* in addition to the base release version number,
* 3. provide your name and address as the primary contact for the
* support of your modified version, and
* 4. retain our contact information in regard to use of the base
* software.
* Permission to distribute the released version of the source code along
* with corresponding source modifications in the form of a patch file is
* granted with same provisions 2 through 4 for binary distributions.
*
* This software is provided "as is" without express or implied warranty
* to the extent permitted by applicable law.
]*/
/* lph changes:
* (a) make EXPORT_SELECTION the default and specify NOEXPORT to undefine
* (b) append X11 terminal number to resource name
* (c) change cursor for active terminal
*/
/*-----------------------------------------------------------------------------
* gnuplot_x11 - X11 outboard terminal driver for gnuplot 3.3
*
* Requires installation of companion inboard x11 driver in gnuplot/term.c
*
* Acknowledgements:
* Chris Peterson (MIT)
* Dana Chee (Bellcore)
* Arthur Smith (Cornell)
* Hendri Hondorp (University of Twente, The Netherlands)
* Bill Kucharski (Solbourne)
* Charlie Kline (University of Illinois)
* Yehavi Bourvine (Hebrew University of Jerusalem, Israel)
* Russell Lang (Monash University, Australia)
* O'Reilly & Associates: X Window System - Volumes 1 & 2
*
* This code is provided as is and with no warranties of any kind.
*
* drd: change to allow multiple windows to be maintained independently
*
* There is a mailing list for gnuplot users. Note, however, that the
* newsgroup
* comp.graphics.apps.gnuplot
* is identical to the mailing list (they
* both carry the same set of messages). We prefer that you read the
* messages through that newsgroup, to subscribing to the mailing list.
* (If you can read that newsgroup, and are already on the mailing list,
* please send a message to majordomo@dartmouth.edu, asking to be
* removed from the mailing list.)
*
* The address for mailing to list members is
* info-gnuplot@dartmouth.edu
* and for mailing administrative requests is
* majordomo@dartmouth.edu
* The mailing list for bug reports is
* bug-gnuplot@dartmouth.edu
* The list of those interested in beta-test versions is
* info-gnuplot-beta@dartmouth.edu
*---------------------------------------------------------------------------*/
/* drd : export the graph via ICCCM primary selection. well... not quite
* ICCCM since we dont support full list of targets, but this
* is a start. define EXPORT_SELECTION if you want this feature
*/
/*lph: add a "feature" to undefine EXPORT_SELECTION
The following makes EXPORT_SELECTION the default and
defining NOEXPORT over-rides the default
*/
#ifdef EXPORT_SELECTION
# undef EXPORT_SELECTION
#endif /* EXPORT SELECTION */
#ifndef NOEXPORT
# define EXPORT_SELECTION XA_PRIMARY
#endif /* NOEXPORT */
#if !(defined(VMS) || defined(CRIPPLED_SELECT))
# define DEFAULT_X11
#endif
#if defined(VMS) && defined(CRIPPLED_SELECT)
Error. Incompatible options.
#endif
#include <X11/Xos.h>
#include <X11/Xlib.h>
#include <X11/Xresource.h>
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/keysym.h>
#include <signal.h>
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_SYS_BSDTYPES_H
# include <sys/bsdtypes.h>
#endif /* HAVE_SYS_BSDTYPES_H */
#ifdef __EMX__
/* for gethostname ... */
# include <netdb.h>
#endif
#if defined(HAVE_SYS_SELECT_H) && !defined(VMS)
# include <sys/select.h>
#endif /* HAVE_SYS_SELECT_H && !VMS */
#ifndef FD_SET
# define FD_SET(n, p) ((p)->fds_bits[0] |= (1 << ((n) % 32)))
# define FD_CLR(n, p) ((p)->fds_bits[0] &= ~(1 << ((n) % 32)))
# define FD_ISSET(n, p) ((p)->fds_bits[0] & (1 << ((n) % 32)))
# define FD_ZERO(p) memset((char *)(p),'\0',sizeof(*(p)))
#endif /* not FD_SET */
#include "ansichek.h"
#include "stdfn.h"
#if defined(HAVE_SYS_SYSTEMINFO_H) && defined(HAVE_SYSINFO)
# include <sys/systeminfo.h>
# define SYSINFO_METHOD "sysinfo"
# define GP_SYSTEMINFO(host) sysinfo (SI_HOSTNAME, (host), MAXHOSTNAMELEN)
#else
# define SYSINFO_METHOD "gethostname"
# define GP_SYSTEMINFO(host) gethostname ((host), MAXHOSTNAMELEN)
#endif /* HAVE_SYS_SYSTEMINFO_H && HAVE_SYSINFO */
#ifdef VMS
# ifdef __DECC
# include <starlet.h>
# endif /* __DECC */
# define EXIT(status) sys$delprc(0,0) /* VMS does not drop itself */
#else
# define EXIT(status) exit(status)
#endif
#ifdef OSK
# define EINTR E_ILLFNC
#endif
/* information about one window/plot */
typedef struct plot_struct {
Window window;
Pixmap pixmap;
unsigned int posn_flags;
int x, y;
unsigned int width, height; /* window size */
unsigned int px, py; /* pointsize */
int ncommands, max_commands;
char **commands;
} plot_struct;
void store_command __PROTO((char *line, plot_struct * plot));
void prepare_plot __PROTO((plot_struct * plot, int term_number));
void delete_plot __PROTO((plot_struct * plot));
int record __PROTO((void));
void process_event __PROTO((XEvent * event)); /* from Xserver */
void mainloop __PROTO((void));
void display __PROTO((plot_struct * plot));
void reset_cursor __PROTO((void));
void preset __PROTO((int argc, char *argv[]));
char *pr_GetR __PROTO((XrmDatabase db, char *resource));
void pr_color __PROTO((void));
void pr_dashes __PROTO((void));
void pr_font __PROTO((void));
void pr_geometry __PROTO((void));
void pr_pointsize __PROTO((void));
void pr_width __PROTO((void));
Window pr_window __PROTO((unsigned int flags, int x, int y, unsigned int width, unsigned height));
void pr_raise __PROTO((void));
void pr_persist __PROTO((void));
#ifdef EXPORT_SELECTION
void export_graph __PROTO((plot_struct * plot));
void handle_selection_event __PROTO((XEvent * event));
#endif
#define FallbackFont "fixed"
#define Ncolors 13
unsigned long colors[Ncolors];
#define Nwidths 10
unsigned int widths[Nwidths] = { 2, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
#define Ndashes 10
char dashes[Ndashes][5];
#define MAX_WINDOWS 16
#define XC_crosshair 34
struct plot_struct plot_array[MAX_WINDOWS];
Display *dpy;
int scr;
Window root;
Visual *vis;
GC gc = (GC) 0;
XFontStruct *font;
int do_raise = 1, persist = 0;
KeyCode q_keycode;
Cursor cursor;
int windows_open = 0;
int gX = 100, gY = 100;
unsigned int gW = 640, gH = 450;
unsigned int gFlags = PSize;
unsigned int BorderWidth = 2;
unsigned int D; /* depth */
Bool Mono = 0, Gray = 0, Rv = 0, Clear = 0;
char Name[64] = "gnuplot";
char Class[64] = "Gnuplot";
int cx = 0, cy = 0, vchar;
double xscale, yscale, pointsize;
#define X(x) (int) ((x) * xscale)
#define Y(y) (int) ((4095-(y)) * yscale)
enum JUSTIFY { LEFT, CENTRE, RIGHT } jmode;
#define Nbuf 1024
char buf[Nbuf], **commands = (char **) 0;
FILE *X11_ipc;
char X11_ipcpath[32];
/* when using an ICCCM-compliant window manager, we can ask it
* to send us an event when user chooses 'close window'. We do this
* by setting WM_DELETE_WINDOW atom in property WM_PROTOCOLS
*/
Atom WM_PROTOCOLS, WM_DELETE_WINDOW;
XPoint Diamond[5], Triangle[4];
XSegment Plus[2], Cross[2], Star[4];
/*-----------------------------------------------------------------------------
* main program
*---------------------------------------------------------------------------*/
int main(argc, argv)
int argc;
char *argv[];
{
#ifdef OSK
/* malloc large blocks, otherwise problems with fragmented mem */
_mallocmin(102400);
#endif
FPRINTF((stderr, "gnuplot_X11 starting up\n"));
preset(argc, argv);
/* set up the alternative cursor */
cursor = XCreateFontCursor(dpy, XC_crosshair);
mainloop();
if (persist) {
FPRINTF((stderr, "waiting for %d windows\n, windows_open"));
/* read x events until all windows have been quit */
while (windows_open > 0) {
XEvent event;
XNextEvent(dpy, &event);
process_event(&event);
}
}
XCloseDisplay(dpy);
FPRINTF((stderr, "exiting\n"));
EXIT(0);
}
/*-----------------------------------------------------------------------------
* mainloop processing - process X events and input from gnuplot
*
* Three different versions of main loop processing are provided to support
* three different platforms.
*
* DEFAULT_X11: use select() for both X events and input on stdin
* from gnuplot inboard driver
*
* CRIPPLED_SELECT: use select() to service X events and check during
* select timeout for temporary plot file created
* by inboard driver
*
* VMS: use XNextEvent to service X events and AST to
* service input from gnuplot inboard driver on stdin
*---------------------------------------------------------------------------*/
#ifdef DEFAULT_X11
/*-----------------------------------------------------------------------------
* DEFAULT_X11 mainloop
*---------------------------------------------------------------------------*/
void mainloop()
{
int nf, nfds, cn = ConnectionNumber(dpy), in;
struct timeval *timer = (struct timeval *) 0;
#ifdef ISC22
struct timeval timeout;
#endif
fd_set rset, tset;
X11_ipc = stdin;
in = fileno(X11_ipc);
FD_ZERO(&rset);
FD_SET(cn, &rset);
FD_SET(in, &rset);
nfds = (cn > in) ? cn + 1 : in + 1;
#ifdef ISC22
/* Added by Robert Eckardt, RobertE@beta.TP2.Ruhr-Uni-Bochum.de */
timeout.tv_sec = 0; /* select() in ISC2.2 needs timeout */
timeout.tv_usec = 300000; /* otherwise input from gnuplot is */
timer = &timeout; /* suspended til next X event. */
#endif /* ISC22 (0.3s are short enough not to be noticed */
while (1) {
/* XNextEvent does an XFlush() before waiting. But here.
* we must ensure that the queue is flushed, since we
* dont call XNextEvent until an event arrives. (I have
* twice wasted quite some time over this issue, so now
* I am making sure of it !
*/
XFlush(dpy);
tset = rset;
nf = select((gp_nfds_t)nfds, gp_fd_set_p &tset, gp_fd_set_p 0,
gp_fd_set_p 0, gp_timeval_p timer);
if (nf < 0) {
if (errno == EINTR)
continue;
fprintf(stderr, "gnuplot: select failed. errno:%d\n", errno);
EXIT(1);
}
if (nf > 0)
XNoOp(dpy);
if (FD_ISSET(cn, &tset)) {
/* used to use CheckMaskEvent() but that cannot receive
* maskable events such as ClientMessage. So now we do
* one event, then return to the select.
* And that almost works, except that under some Xservers
* running without a window manager (e.g. Hummingbird Exceed under Win95)
* a bogus ConfigureNotify is sent followed by a valid ConfigureNotify
* when the window is maximized. The two events are queued, apparently
* in a single I/O because select() above doesn't see the second, valid
* event. This little loop fixes the problem by flushing the
* event queue completely.
*/
XEvent xe;
do {
XNextEvent(dpy, &xe);
process_event(&xe);
} while (XPending(dpy));
}
if (FD_ISSET(in, &tset)) {
if (!record()) /* end of input */
return;
}
}
}
#endif
#ifdef CRIPPLED_SELECT
/*-----------------------------------------------------------------------------
* CRIPPLED_SELECT mainloop
*---------------------------------------------------------------------------*/
void mainloop()
{
int nf, nfds, cn = ConnectionNumber(dpy);
struct timeval timeout, *timer;
fd_set rset, tset;
unsigned long all = (unsigned long) (-1L);
XEvent xe;
FD_ZERO(&rset);
FD_SET(cn, &rset);
timeout.tv_sec = 1;
timeout.tv_usec = 0;
timer = &timeout;
sprintf(X11_ipcpath, "/tmp/Gnuplot_%d", getppid());
nfds = cn + 1;
while (1) {
XFlush(dpy); /* see above */
tset = rset;
nf = select((gp_nfds_t)nfds, gp_fd_set_p &tset, gp_fd_set_p 0,
gp_fd_set_p 0, gp_timeval_p timer);
if (nf < 0) {
if (errno == EINTR)
continue;
fprintf(stderr, "gnuplot: select failed. errno:%d\n", errno);
EXIT(1);
}
nf > 0 && XNoOp(dpy);
if (FD_ISSET(cn, &tset)) {
while (XCheckMaskEvent(dpy, all, &xe)) {
process_event(&xe);
}
}
if ((X11_ipc = fopen(X11_ipcpath, "r"))) {
unlink(X11_ipcpath);
record();
fclose(X11_ipc);
}
}
}
#endif /* CRIPPLED_SELECT */
#ifdef VMS
/*-----------------------------------------------------------------------------
* VMS mainloop - Yehavi Bourvine - YEHAVI@VMS.HUJI.AC.IL
*---------------------------------------------------------------------------*/
/* In VMS there is no decent Select(). hence, we have to loop inside
* XGetNextEvent for getting the next X window event. In order to get input
* from the master we assign a channel to SYS$INPUT and use AST's in order to
* receive data. In order to exit the mainloop, we need to somehow make XNextEvent
* return from within the ast. We do this with a XSendEvent() to ourselves !
* This needs a window to send the message to, so we create an unmapped window
* for this purpose. Event type XClientMessage is perfect for this, but it
* appears that such messages come from elsewhere (motif window manager, perhaps ?)
* So we need to check fairly carefully that it is the ast event that has been received.
*/
#include <iodef.h>
char STDIIN[] = "SYS$INPUT:";
short STDIINchannel, STDIINiosb[4];
struct { short size, type; char *address; } STDIINdesc;
char STDIINbuffer[64];
int status;
ast()
{
int status = sys$qio(0, STDIINchannel, IO$_READVBLK, STDIINiosb, record,
0, STDIINbuffer, sizeof(STDIINbuffer) - 1, 0, 0, 0, 0);
if ((status & 0x1) == 0)
EXIT(status);
}
Window message_window;
void mainloop()
{
/* dummy unmapped window for receiving internally-generated terminate
* messages
*/
message_window = XCreateSimpleWindow(dpy, root, 0, 0, 1, 1, 1, 0, 0);
STDIINdesc.size = strlen(STDIIN);
STDIINdesc.type = 0;
STDIINdesc.address = STDIIN;
status = sys$assign(&STDIINdesc, &STDIINchannel, 0, 0, 0);
if ((status & 0x1) == 0)
EXIT(status);
ast();
for (;;) {
XEvent xe;
XNextEvent(dpy, &xe);
if (xe.type == ClientMessage && xe.xclient.window == message_window) {
if (xe.xclient.message_type == None &&
xe.xclient.format == 8 &&
strcmp(xe.xclient.data.b, "die gnuplot die") == 0) {
FPRINTF((stderr, "quit message from ast\n"));
return;
} else {
FPRINTF((stderr, "Bogus XClientMessage event from window manager ?\n"));
}
}
process_event(&xe);
}
}
#endif /* VMS */
/* delete a window / plot */
void delete_plot(plot)
plot_struct *plot;
{
int i;
FPRINTF((stderr, "Delete plot %d\n", plot - plot_array));
for (i = 0; i < plot->ncommands; ++i)
free(plot->commands[i]);
plot->ncommands = 0;
if (plot->window) {
FPRINTF((stderr, "Destroy window 0x%x\n", plot->window));
XDestroyWindow(dpy, plot->window);
plot->window = None;
--windows_open;
}
if (plot->pixmap) {
XFreePixmap(dpy, plot->pixmap);
plot->pixmap = None;
}
/* but preserve geometry */
}
/* prepare the plot structure */
void prepare_plot(plot, term_number)
plot_struct *plot;
int term_number;
{
int i;
char *term_name;
for (i = 0; i < plot->ncommands; ++i)
free(plot->commands[i]);
plot->ncommands = 0;
if (!plot->posn_flags) {
/* first time this window has been used - use default or -geometry
* settings
*/
plot->posn_flags = gFlags;
plot->x = gX;
plot->y = gY;
plot->width = gW;
plot->height = gH;
}
if (!plot->window) {
plot->window = pr_window(plot->posn_flags, plot->x, plot->y, plot->width, plot->height);
++windows_open;
/* append the X11 terminal number (if greater than zero) */
if (term_number) {
char new_name[60];
XFetchName(dpy, plot->window, &term_name);
FPRINTF((stderr, "Window title is %s\n", term_name));
sprintf(new_name, "%.55s%3d", term_name, term_number);
FPRINTF((stderr, "term_number is %d\n", term_number));
XStoreName(dpy, plot->window, new_name);
sprintf(new_name, "gplt%3d", term_number);
XSetIconName(dpy, plot->window, new_name);
}
}
/* We don't know that it is the same window as before, so we reset the
* cursors for all windows and then define the cursor for the active
* window
*/
reset_cursor();
XDefineCursor(dpy, plot->window, cursor);
}
/* store a command in a plot structure */
void store_command(buffer, plot)
char *buffer;
plot_struct *plot;
{
char *p;
FPRINTF((stderr, "Store in %d : %s", plot - plot_array, buffer));
if (plot->ncommands >= plot->max_commands) {
plot->max_commands = plot->max_commands * 2 + 1;
plot->commands = (plot->commands)
? (char **) realloc(plot->commands, plot->max_commands * sizeof(char *))
: (char **) malloc(sizeof(char *));
}
p = (char *) malloc((unsigned) strlen(buffer) + 1);
if (!plot->commands || !p) {
fprintf(stderr, "gnuplot: can't get memory. X11 aborted.\n");
EXIT(1);
}
plot->commands[plot->ncommands++] = strcpy(p, buffer);
}
#ifndef VMS
/*-----------------------------------------------------------------------------
* record - record new plot from gnuplot inboard X11 driver (Unix)
*---------------------------------------------------------------------------*/
int record()
{
static plot_struct *plot = plot_array;
while (fgets(buf, Nbuf, X11_ipc)) {
switch (*buf) {
case 'G': /* enter graphics mode */
{
int plot_number = atoi(buf + 1); /* 0 if none specified */
if (plot_number < 0 || plot_number >= MAX_WINDOWS)
plot_number = 0;
FPRINTF((stderr, "plot for window number %d\n", plot_number));
plot = plot_array + plot_number;
prepare_plot(plot, plot_number);
continue;
}
case 'E': /* leave graphics mode / suspend */
display(plot);
return 1;
case 'R': /* leave x11 mode */
reset_cursor();
return 0;
default:
store_command(buf, plot);
continue;
}
}
/* get here if fgets fails */
#ifdef OSK
if (feof(X11_ipc)) /* On OS-9 sometimes while resizing the window, */
_cleareof(X11_ipc); /* and plotting data, the eof or error flag of */
if (ferror(X11_ipc)) /* X11_ipc stream gets set, while there is */
clearerr(X11_ipc); /* nothing wrong! Probably a bug in my select()? */
#else
if (feof(X11_ipc) || ferror(X11_ipc))
return 0;
#endif /* not OSK */
return 1;
}
#else /* VMS */
/*-----------------------------------------------------------------------------
* record - record new plot from gnuplot inboard X11 driver (VMS)
*---------------------------------------------------------------------------*/
record()
{
static plot_struct *plot = plot_array;
int status;
if ((STDIINiosb[0] & 0x1) == 0)
EXIT(STDIINiosb[0]);
STDIINbuffer[STDIINiosb[1]] = '\0';
strcpy(buf, STDIINbuffer);
switch (*buf) {
case 'G': /* enter graphics mode */
{
int plot_number = atoi(buf + 1); /* 0 if none specified */
if (plot_number < 0 || plot_number >= MAX_WINDOWS)
plot_number = 0;
FPRINTF((stderr, "plot for window number %d\n", plot_number));
plot = plot_array + plot_number;
prepare_plot(plot, plot_number);
break;
}
case 'E': /* leave graphics mode */
display(plot);
break;
case 'R': /* exit x11 mode */
FPRINTF((stderr, "received R - sending ClientMessage\n"));
reset_cursor();
sys$cancel(STDIINchannel);
/* this is ridiculous - cook up an event to ourselves,
* in order to get the mainloop() out of the XNextEvent() call
* it seems that window manager can also send clientmessages,
* so put a checksum into the message
*/
{
XClientMessageEvent event;
event.type = ClientMessage;
event.send_event = True;
event.display = dpy;
event.window = message_window;
event.message_type = None;
event.format = 8;
strcpy(event.data.b, "die gnuplot die");
XSendEvent(dpy, message_window, False, 0, (XEvent *) & event);
XFlush(dpy);
}
return; /* no ast */
default:
store_command(buf, plot);
break;
}
ast();
}
#endif /* VMS */
/*-----------------------------------------------------------------------------
* display - display a stored plot
*---------------------------------------------------------------------------*/
void display(plot)
plot_struct *plot;
{
int n, x, y, sw, sl, lt = 0, width, type, point, px, py;
int user_width = 1; /* as specified by plot...linewidth */
char *buffer, *str;
FPRINTF((stderr, "Display %d ; %d commands\n", plot - plot_array, plot->ncommands));
if (plot->ncommands == 0)
return;
/* set scaling factor between internal driver & window geometry */
xscale = plot->width / 4096.0;
yscale = plot->height / 4096.0;
/* initial point sizes, until overridden with P7xxxxyyyy */
px = (int) (xscale * pointsize);
py = (int) (yscale * pointsize);
/* create new pixmap & GC */
if (gc)
XFreeGC(dpy, gc);
if (!plot->pixmap) {
FPRINTF((stderr, "Create pixmap %d : %dx%dx%d\n", plot - plot_array, plot->width, plot->height, D));
plot->pixmap = XCreatePixmap(dpy, root, plot->width, plot->height, D);
}
gc = XCreateGC(dpy, plot->pixmap, 0, (XGCValues *) 0);
XSetFont(dpy, gc, font->fid);
/* set pixmap background */
XSetForeground(dpy, gc, colors[0]);
XFillRectangle(dpy, plot->pixmap, gc, 0, 0, plot->width, plot->height);
XSetBackground(dpy, gc, colors[0]);
if (!plot->window) {
plot->window = pr_window(plot->posn_flags, plot->x, plot->y, plot->width, plot->height);
++windows_open;
}
/* top the window but don't put keyboard or mouse focus into it. */
if (do_raise)
XMapRaised(dpy, plot->window);
/* momentarily clear the window first if requested */
if (Clear) {
XClearWindow(dpy, plot->window);
XFlush(dpy);
}
/* loop over accumulated commands from inboard driver */
for (n = 0; n < plot->ncommands; n++) {
buffer = plot->commands[n];
/* X11_vector(x,y) - draw vector */
if (*buffer == 'V') {
sscanf(buffer, "V%4d%4d", &x, &y);
XDrawLine(dpy, plot->pixmap, gc, X(cx), Y(cy), X(x), Y(y));
cx = x;
cy = y;
}
/* X11_move(x,y) - move */
else if (*buffer == 'M')
sscanf(buffer, "M%4d%4d", &cx, &cy);
/* X11_put_text(x,y,str) - draw text */
else if (*buffer == 'T') {
sscanf(buffer, "T%4d%4d", &x, &y);
str = buffer + 9;
sl = strlen(str) - 1;
sw = XTextWidth(font, str, sl);
switch (jmode) {
case LEFT:
sw = 0;
break;
case CENTRE:
sw = -sw / 2;
break;
case RIGHT:
sw = -sw;
break;
}
XSetForeground(dpy, gc, colors[2]);
XDrawString(dpy, plot->pixmap, gc, X(x) + sw, Y(y) + vchar / 3, str, sl);
XSetForeground(dpy, gc, colors[lt + 3]);
} else if (*buffer == 'F') { /* fill box */
int style, xtmp, ytmp, w, h;
if (sscanf(buffer + 1, "%4d%4d%4d%4d%4d", &style, &xtmp, &ytmp, &w, &h) == 5) {
/* gnuplot has origin at bottom left, but X uses top left
* There may be an off-by-one (or more) error here.
* style ignored here for the moment
*/
ytmp += h; /* top left corner of rectangle to be filled */
w *= xscale;
h *= yscale;
XSetForeground(dpy, gc, colors[0]);
XFillRectangle(dpy, plot->pixmap, gc, X(xtmp), Y(ytmp), w, h);
XSetForeground(dpy, gc, colors[lt + 3]);
}
}
/* X11_justify_text(mode) - set text justification mode */
else if (*buffer == 'J')
sscanf(buffer, "J%4d", (int *) &jmode);
/* X11_linewidth(width) - set line width */
else if (*buffer == 'W')
sscanf(buffer + 1, "%4d", &user_width);
/* X11_linetype(type) - set line type */
else if (*buffer == 'L') {
sscanf(buffer, "L%4d", <);
lt = (lt % 8) + 2;
/* default width is 0 {which X treats as 1} */
width = widths[lt] ? user_width * widths[lt] : user_width;
if (dashes[lt][0]) {
type = LineOnOffDash;
XSetDashes(dpy, gc, 0, dashes[lt], strlen(dashes[lt]));
} else {
type = LineSolid;
}
XSetForeground(dpy, gc, colors[lt + 3]);
XSetLineAttributes(dpy, gc, width, type, CapButt, JoinBevel);
}
/* X11_point(number) - draw a point */
else if (*buffer == 'P') {
/* linux sscanf does not like %1d%4d%4d" with Oxxxxyyyy */
/* sscanf(buffer, "P%1d%4d%4d", &point, &x, &y); */
point = buffer[1] - '0';
sscanf(buffer + 2, "%4d%4d", &x, &y);
if (point == 7) {
/* set point size */
px = (int) (x * xscale * pointsize);
py = (int) (y * yscale * pointsize);
} else {
if (type != LineSolid || width != 0) { /* select solid line */
XSetLineAttributes(dpy, gc, 0, LineSolid, CapButt, JoinBevel);
}
switch (point) {
case 0: /* dot */
XDrawPoint(dpy, plot->pixmap, gc, X(x), Y(y));
break;
case 1: /* do diamond */
Diamond[0].x = (short) X(x) - px;
Diamond[0].y = (short) Y(y);
Diamond[1].x = (short) px;
Diamond[1].y = (short) -py;
Diamond[2].x = (short) px;
Diamond[2].y = (short) py;
Diamond[3].x = (short) -px;
Diamond[3].y = (short) py;
Diamond[4].x = (short) -px;
Diamond[4].y = (short) -py;
/*
* Should really do a check with XMaxRequestSize()
*/
XDrawLines(dpy, plot->pixmap, gc, Diamond, 5, CoordModePrevious);
XDrawPoint(dpy, plot->pixmap, gc, X(x), Y(y));
break;
case 2: /* do plus */
Plus[0].x1 = (short) X(x) - px;
Plus[0].y1 = (short) Y(y);
Plus[0].x2 = (short) X(x) + px;
Plus[0].y2 = (short) Y(y);
Plus[1].x1 = (short) X(x);
Plus[1].y1 = (short) Y(y) - py;
Plus[1].x2 = (short) X(x);
Plus[1].y2 = (short) Y(y) + py;
XDrawSegments(dpy, plot->pixmap, gc, Plus, 2);
break;
case 3: /* do box */
XDrawRectangle(dpy, plot->pixmap, gc, X(x) - px, Y(y) - py, (px + px), (py + py));
XDrawPoint(dpy, plot->pixmap, gc, X(x), Y(y));
break;
case 4: /* do X */
Cross[0].x1 = (short) X(x) - px;
Cross[0].y1 = (short) Y(y) - py;
Cross[0].x2 = (short) X(x) + px;
Cross[0].y2 = (short) Y(y) + py;
Cross[1].x1 = (short) X(x) - px;
Cross[1].y1 = (short) Y(y) + py;
Cross[1].x2 = (short) X(x) + px;
Cross[1].y2 = (short) Y(y) - py;
XDrawSegments(dpy, plot->pixmap, gc, Cross, 2);
break;
case 5: /* do triangle */
{
short temp_x, temp_y;
temp_x = (short) (1.33 * (double) px + 0.5);
temp_y = (short) (1.33 * (double) py + 0.5);
Triangle[0].x = (short) X(x);
Triangle[0].y = (short) Y(y) - temp_y;
Triangle[1].x = (short) temp_x;
Triangle[1].y = (short) 2 *py;
Triangle[2].x = (short) -(2 * temp_x);
Triangle[2].y = (short) 0;
Triangle[3].x = (short) temp_x;
Triangle[3].y = (short) -(2 * py);
XDrawLines(dpy, plot->pixmap, gc, Triangle, 4, CoordModePrevious);
XDrawPoint(dpy, plot->pixmap, gc, X(x), Y(y));
}
break;
case 6: /* do star */
Star[0].x1 = (short) X(x) - px;
Star[0].y1 = (short) Y(y);
Star[0].x2 = (short) X(x) + px;
Star[0].y2 = (short) Y(y);
Star[1].x1 = (short) X(x);
Star[1].y1 = (short) Y(y) - py;
Star[1].x2 = (short) X(x);
Star[1].y2 = (short) Y(y) + py;
Star[2].x1 = (short) X(x) - px;
Star[2].y1 = (short) Y(y) - py;
Star[2].x2 = (short) X(x) + px;
Star[2].y2 = (short) Y(y) + py;
Star[3].x1 = (short) X(x) - px;
Star[3].y1 = (short) Y(y) + py;
Star[3].x2 = (short) X(x) + px;
Star[3].y2 = (short) Y(y) - py;
XDrawSegments(dpy, plot->pixmap, gc, Star, 4);
break;
}
if (type != LineSolid || width != 0) { /* select solid line */
XSetLineAttributes(dpy, gc, width, type, CapButt, JoinBevel);
}
}
}
}
/* set new pixmap as window background */
XSetWindowBackgroundPixmap(dpy, plot->window, plot->pixmap);
/* trigger exposure of background pixmap */
XClearWindow(dpy, plot->window);
#ifdef EXPORT_SELECTION
export_graph(plot);
#endif
XFlush(dpy);
}