x11.c

另一款电路设计软件

Widget w;
caddr_t clientdata, calldata;
{

	XKeyEvent *keyev = (XKeyPressedEvent *) calldata;
	GRAPH *graph = (GRAPH *) clientdata;
	char text[4];
	int nbytes;

	nbytes = XLookupString(keyev, text, 4, NULL, NULL);
	if (!nbytes) return;
	/* write it */
	PushGraphContext(graph);
	text[nbytes] = '\0';
	SetColor(1);
	Text(text, keyev->x, graph->absolute.height - keyev->y);
	/* save it */
	SaveText(graph, text, keyev->x, graph->absolute.height - keyev->y);
	/* warp mouse so user can type in sequence */
	XWarpPointer(display, None, DEVDEP(graph).window, 0, 0, 0, 0,
	    keyev->x + XTextWidth(DEVDEP(graph).font, text, nbytes),
	    keyev->y);
	PopGraphContext();

}

#  ifdef notdef
void
keyhandler(clientdata, source, id)
caddr_t clientdata;
int *source;
XtInputId id;
{

#    ifdef notdef
	KEYwaiting = TRUE;
#  endif

}
#  endif

void
handlebuttonev(w, clientdata, calldata)
Widget w;
caddr_t clientdata, calldata;
{

	XButtonEvent *buttonev = (XButtonEvent *) calldata;

	switch (buttonev->button) {
	  case Button1:
	    slopelocation((GRAPH *) clientdata, buttonev->x, buttonev->y);
	    break;
	  case Button3:
	    zoomin((GRAPH *) clientdata);
	    break;
	}

}

#  ifdef notdef
handlemotionev(w, clientdata, calldata)
Widget w;
caddr_t clientdata, calldata;
{

	XMotionEvent *motionev = (XMotionEvent *) calldata;

	switch
}
#  endif

slopelocation(graph, x0, y0)
GRAPH *graph;
int x0, y0;         /* initial position of mouse */
{

	int x1, y1;
	int x, y;
	Window rootwindow, childwindow;
	int rootx, rooty;
	unsigned int state;
	double fx0, fx1, fy0, fy1;
	double angle;

	x1 = x0;
	y1 = y0;
	XQueryPointer(display, DEVDEP(graph).window, &rootwindow, &childwindow,
	        &rootx, &rooty, &x, &y, &state);
	XDrawLine(display, DEVDEP(graph).window, xorgc, x0, y0, x0, y1-1);
	XDrawLine(display, DEVDEP(graph).window, xorgc, x0, y1, x1, y1);
	while (state & Button1Mask) {
	  if (x != x1 || y != y1) {
	    XDrawLine(display, DEVDEP(graph).window, xorgc,
	        x0, y0, x0, y1-1);
	    XDrawLine(display, DEVDEP(graph).window, xorgc,
	        x0, y1, x1, y1);
	    x1 = x;
	    y1 = y;
	    XDrawLine(display, DEVDEP(graph).window, xorgc, x0, y0, x0, y1-1);
	    XDrawLine(display, DEVDEP(graph).window, xorgc, x0, y1, x1, y1);
	  }
	  XQueryPointer(display, DEVDEP(graph).window, &rootwindow,
	        &childwindow, &rootx, &rooty, &x, &y, &state);
	}
	XDrawLine(display, DEVDEP(graph).window, xorgc, x0, y0, x0, y1-1);
	XDrawLine(display, DEVDEP(graph).window, xorgc, x0, y1, x1, y1);

	X_ScreentoData(graph, x0, y0, &fx0, &fy0);
	X_ScreentoData(graph, x1, y1, &fx1, &fy1);

	/* print it out */
	if (x1 == x0 && y1 == y0) {     /* only one location */
	    fprintf(stdout, "\nx0 = %g, y0 = %g\n", fx0, fy0);
	    if (graph->grid.gridtype == GRID_POLAR
	        || graph->grid.gridtype == GRID_SMITH
		|| graph->grid.gridtype == GRID_SMITHGRID)
	    {
		angle = RAD_TO_DEG * atan2( fy0, fx0 );
		fprintf(stdout, "r0 = %g, a0 = %g\n",
		    sqrt( fx0*fx0 + fy0*fy0 ),
		    (angle>0)?angle:(double) 360+angle);
	    }


	} else {    /* need to print info about two points */
	  fprintf(stdout, "\nx0 = %g, y0 = %g    x1 = %g, y1 = %g\n",
	      fx0, fy0, fx1, fy1);
	  fprintf(stdout, "dx = %g, dy = %g\n", fx1-fx0, fy1 - fy0);
	  if (x1 != x0 && y1 != y0) {
	/* add slope info if both dx and dy are zero,
	     because otherwise either dy/dx or dx/dy is zero,
	     which is uninteresting
	*/
	    fprintf(stdout, "dy/dx = %g    dx/dy = %g\n",
	    (fy1-fy0)/(fx1-fx0), (fx1-fx0)/(fy1-fy0));
	  }
	}

	return;

}

/* should be able to do this by sleight of hand on graph parameters */
zoomin(graph)
GRAPH *graph;
{
/* note: need to add circular boxes XXX */

	int x0, y0, x1, y1;
	double fx0, fx1, fy0, fy1, ftemp;
	char buf[BSIZE_SP];
	char buf2[128];
	char *t;
	wordlist *wl;
	int dummy;

	Window rootwindow, childwindow;
	int rootx, rooty;
	unsigned int state;
	int x, y, upperx, uppery, lowerx, lowery;

	/* open box and get area to zoom in on */

	XQueryPointer(display, DEVDEP(graph).window, &rootwindow,
	        &childwindow, &rootx, &rooty, &x0, &y0, &state);

	x = lowerx = x1 = x0 + BOXSIZE;
	y = lowery = y1 = y0 + BOXSIZE;
	upperx = x0;
	uppery = y0;

	XDrawRectangle(display, DEVDEP(graph).window, xorgc,
	        upperx, uppery, lowerx - upperx, lowery - uppery);

/* note: what are src_x, src_y, src_width, and src_height for? XXX */
	XWarpPointer(display, None, DEVDEP(graph).window, 0, 0, 0, 0, x1, y1);

	while (state & Button3Mask) {
	  if (x != x1 || y != y1) {
	    XDrawRectangle(display, DEVDEP(graph).window, xorgc,
	        upperx, uppery, lowerx - upperx, lowery - uppery);
	    x1 = x;
	    y1 = y;
	    /* figure out upper left corner */
	    /* remember X11's (and X10's) demented coordinate system */
	    if (y0 < y1) {
	      uppery = y0;
	      upperx = x0;
	      lowery = y1;
	      lowerx = x1;
	    } else {
	      uppery = y1;
	      upperx = x1;
	      lowery = y0;
	      lowerx = x0;
	    }
	    XDrawRectangle(display, DEVDEP(graph).window, xorgc,
	        upperx, uppery, lowerx - upperx, lowery - uppery);
	  }
	  XQueryPointer(display, DEVDEP(graph).window, &rootwindow,
	           &childwindow, &rootx, &rooty, &x, &y, &state);
	}
	XDrawRectangle(display, DEVDEP(graph).window, xorgc,
	        upperx, uppery, lowerx - upperx, lowery - uppery);

	X_ScreentoData(graph, x0, y0, &fx0, &fy0);
	X_ScreentoData(graph, x1, y1, &fx1, &fy1);

	if (fx0 > fx1) {
	  ftemp = fx0;
	  fx0 = fx1;
	  fx1 = ftemp;
	}
	if (fy0 > fy1) {
	  ftemp = fy0;
	  fy0 = fy1;
	  fy1 = ftemp;
	}

	strncpy(buf2, graph->plotname, sizeof(buf2));
	if (t = index(buf2, ':'))
		*t = 0;

	if (!eq(plot_cur->pl_typename, buf2)) {
	  (void) sprintf(buf,
"setplot %s; %s xlimit %l.20e %l.20e ylimit %l.20e %l.20e; setplot $curplot\n",
	   buf2, graph->commandline, fx0, fx1, fy0, fy1);
	} else {
	  (void) sprintf(buf, "%s xlimit %le %le ylimit %le %le\n",
	        graph->commandline, fx0, fx1, fy0, fy1);
	}

	/* hack for Gordon Jacobs */
	/* add to history list if plothistory is set */
	if (cp_getvar("plothistory", VT_BOOL, (char *) &dummy)) {
	  wl = cp_parse(buf);
	  (void) cp_addhistent(cp_event++, wl);
	}

	(void) cp_evloop(buf);

}

void
hardcopy(w, client_data, call_data)
    Widget w;
    caddr_t client_data, call_data;
{

	lasthardcopy = (GRAPH *) client_data;
	com_hardcopy(NULL);

}

void
killwin(w, client_data, call_data)
    Widget w;
    caddr_t client_data, call_data;
{

	GRAPH *graph = (GRAPH *) client_data;

	/* Iplots are done asynchronously */
	DEVDEP(graph).isopen = 0;
	DestroyGraph(graph->graphid);
	XtDestroyWidget(DEVDEP(graph).shell);

}

/* call higher gr_redraw routine */
void
redraw(w, client_data, call_data)
    Widget w;
    caddr_t client_data, call_data;
{

	GRAPH *graph = (GRAPH *) client_data;
	XExposeEvent *pev = (XExposeEvent *) call_data;
	XEvent ev;
	XRectangle rects[30];
	int n = 1;

	DEVDEP(graph).isopen = 1;
#  ifdef notdef
	/* if there is a resize, let the resize routine handle the exposures */
	if (XCheckWindowEvent(display, DEVDEP(graph).window,
	 (long) StructureNotifyMask, &ev)) {
	  resize(w, client_data, &ev);
	  return;
	}
#  endif

	rects[0].x = pev->x;
	rects[0].y = pev->y;
	rects[0].width = pev->width;
	rects[0].height = pev->height;

	/* XXX */
	/* pull out all other expose regions that need to be redrawn */
	while (n < 30 && XCheckWindowEvent(display, DEVDEP(graph).window,
	        (long) ExposureMask, &ev)) {
	  pev = (XExposeEvent *) &ev;
	  rects[n].x = pev->x;
	  rects[n].y = pev->y;
	  rects[n].width = pev->width;
	  rects[n].height = pev->height;
	  n++;
	}
	XSetClipRectangles(display, DEVDEP(graph).gc, 0, 0,
	        rects, n, Unsorted);

	noclear = True;
	gr_redraw(graph);
	noclear = False;

	XSetClipMask(display, DEVDEP(graph).gc, None);

}

void
resize(w, client_data, call_data)
Widget w;
caddr_t client_data, call_data;
{

	GRAPH *graph = (GRAPH *) client_data;
	XEvent ev;

	/* pull out all other exposure events
	   Also, get rid of other StructureNotify events on this window. */

	while (XCheckWindowEvent(display, DEVDEP(graph).window,
		(long) /* ExposureMask | */ StructureNotifyMask, &ev))
		;

	XClearWindow(display, DEVDEP(graph).window);
	graph->absolute.width = w->core.width;
	graph->absolute.height = w->core.height;
	gr_resize(graph);

}

#  ifdef notdef
/* stolen from CP/lexical.c */

/* A special 'getc' so that we can deal with ^D properly. There is no way for
 * stdio to know if we have typed a ^D after some other characters, so
 * don't use buffering at all...
 */
static int inchar(fp)
    FILE *fp;
{

	char c;
	int i;
	extern int errno;

#    ifdef HAS_TERMREAD
	if (cp_interactive && !cp_nocc) {
	  i = read((int) fileno(fp), &c, 1);
	  if (i == 0)
	    return (EOF);
	  else if (i == -1) {
	    perror("read");
	    return (EOF);
	  } else
	    return ((int) c);
	}
#    endif
	c = getc(fp);
	return ((int) c);
}
#  endif

X11_Input(request, response)
    REQUEST *request;
    RESPONSE *response;
{

	XEvent ev;
	int nfds, readfds;

	switch (request->option) {
	  case char_option:

	    nfds = ConnectionNumber(display) > fileno(request->fp) ?
	        ConnectionNumber(display) :
	        fileno(request->fp);

	    while (1) {

	      /* first read off the queue before doing the select */
	      while (XtPending()) {
	        XtNextEvent(&ev);
	        XtDispatchEvent(&ev);
	      }

	      readfds = 1 << fileno(request->fp) |
	            1 << ConnectionNumber(display);

	      /* block on ConnectionNumber and request->fp */
	      select(nfds + 1, &readfds, (int *) NULL, (int *) NULL, NULL);

	      /* handle X events first */
	      if (readfds & (1 << ConnectionNumber(display))) {
		    /* handle ALL X events */
		    while (XtPending()) {
			  XtNextEvent(&ev);
			  XtDispatchEvent(&ev);
		    }
	      }

	      if (readfds & (1 << fileno(request->fp))) {
		    response->reply.ch = inchar(request->fp);
		    goto out;
	      }

	    }
	    break;

	  case click_option:
	    /* let's fake this */
	    response->reply.graph = lasthardcopy;
	    break;

	  case button_option:
	    /* sit and handle events until get a button selection */
	    internalerror("button_option not implemented");
	    response->option = error_option;
	    return;
	    break;

	  case checkup_option:
	    /* first read off the queue before doing the select */
	    while (XtPending()) {
	        XtNextEvent(&ev);
	        XtDispatchEvent(&ev);
	    }
	    break;

	  default:
	    internalerror("unrecognized input type");
	    response->option = error_option;
	    return;
	    break;
	}

out:
	if (response)
	    response->option = request->option;
	return;

}

static X_ScreentoData(graph, x, y, fx, fy)
GRAPH *graph;
int x,y;
double *fx, *fy;
{
	double	lmin, lmax;

	if (graph->grid.gridtype == GRID_XLOG
		|| graph->grid.gridtype == GRID_LOGLOG)
	{
		lmin = log10(graph->datawindow.xmin);
		lmax = log10(graph->datawindow.xmax);
		*fx = exp(((x - graph->viewportxoff)
			* (lmax - lmin) / graph->viewport.width + lmin)
			* M_LN10);
	} else {
		*fx = (x - graph->viewportxoff) * graph->aspectratiox +
			graph->datawindow.xmin;
	}

	if (graph->grid.gridtype == GRID_YLOG
		|| graph->grid.gridtype == GRID_LOGLOG)
	{
		lmin = log10(graph->datawindow.ymin);
		lmax = log10(graph->datawindow.ymax);
		*fy = exp(((graph->absolute.height - y - graph->viewportxoff)
			* (lmax - lmin) / graph->viewport.height + lmin)
			* M_LN10);
	} else {
		*fy = ((graph->absolute.height - y) - graph->viewportyoff)
			* graph->aspectratioy + graph->datawindow.ymin;
	}

}

/*ARGSUSED*/
static void
linear_arc(x0,y0,radius,theta1,theta2)
    int x0;   /* x coordinate of center */
    int y0;   /* y coordinate of center */
    int radius;       /* radius of arc */
    double theta1;    /* initial angle ( +x axis = 0 rad ) */
    double theta2;    /* final angle ( +x axis = 0 rad ) */
    /*
     * Notes:
     *    Draws an arc of radius and center at (x0,y0) beginning at
     *    angle theta1 (in rad) and ending at theta2
     */
{
    int x1, y1, x2, y2;
    int s = 60;
    double dphi, phi;

    x2 = x0 + (int) (radius * cos(theta1));
    y2 = y0 + (int) (radius * sin(theta1));

    while(theta1 >= theta2)
	    theta2 += 2 * M_PI;
    dphi = (theta2 - theta1) / s;

    if ((theta1 + dphi) == theta1) {
	    theta2 += 2 * M_PI;
	    dphi = (theta2 - theta1) / s;
    }


    for(phi = theta1 + dphi; phi < theta2; phi += dphi) {
	    x1 = x2;
	    y1 = y2;
	    x2 = x0 + (int)(radius * cos(phi));
	    y2 = y0 + (int)(radius * sin(phi));
	    X11_DrawLine(x1,y1,x2,y2);
    }

    x1 = x2;
    y1 = y2;
    x2 = x0 + (int)(radius * cos(theta2));
    y2 = y0 + (int)(radius * sin(theta2));
    X11_DrawLine(x1,y1,x2,y2);
}

#else /* not HAS_X11 */
int x11_dummy_symbol;
/* otherwise, some linkers get upset */
#endif /* HAS_X11 */