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/* include files */
#include "config.h"
#include <stdio.h>
#include <Xm/Xm.h>
#include <Xm/ScrolledW.h>
#include <Xm/ScrollBar.h>
#include <Xm/PushB.h>
#include <Xm/ToggleB.h>
#include <Xm/ArrowB.h>
#include <Xm/CascadeB.h>
#include <Xm/Separator.h>
#include <Xm/DrawnB.h>
#include <Xm/Scale.h>
#include <Xm/Frame.h>
#include <Xm/Form.h>
#include <Xm/RowColumn.h>
#include <Xm/Label.h>
#include <Xm/TextF.h>
#include <Xm/Text.h>
#include <Xm/List.h>
#include <Xm/DrawingA.h>
#include <Xm/MenuShell.h>
#include <X11/Shell.h>
#include <math.h>
#include "gps.h"
extern void register_canvas(Widget w, GC gc);
extern void draw_graphics(struct gps_data_t *gpsdata);
#define XCENTER (double)(width/2)
#define YCENTER (double)(height/2)
#define SCALE (double)(diameter/2)
#define DEG2RAD (3.1415926535897931160E0/180.0)
#define RM 20
#undef min
#define min(a,b) ((a) < (b) ? (a) : (b))
static Widget draww;
static GC drawGC;
static Dimension width, height;
static int diameter;
static Pixmap pixmap;
void set_color(String color)
{
Display *dpy = XtDisplay(draww);
Colormap cmap = DefaultColormapOfScreen(XtScreen(draww));
XColor col, unused;
if (!XAllocNamedColor(dpy, cmap, color, &col, &unused)) {
char buf[32];
sprintf(buf, "Can't alloc %s", color);
XtWarning(buf);
return;
}
XSetForeground(dpy, drawGC, col.pixel);
}
void register_canvas(Widget w, GC gc)
{
draww = w;
drawGC = gc;
XtVaGetValues(w, XmNwidth, &width, XmNheight, &height, NULL);
pixmap = XCreatePixmap(XtDisplay(w),
RootWindowOfScreen(XtScreen(w)), width, height,
DefaultDepthOfScreen(XtScreen(w)));
set_color("White");
XFillRectangle(XtDisplay(draww), pixmap, drawGC, 0, 0, width, height);
diameter = min(width, height) - RM;
}
/* #define PCORRECT */
static void pol2cart(double azimuth, double elevation, double *xout, double *yout)
{
double sinelev;
azimuth *= DEG2RAD;
elevation = 90.0 - elevation;
#ifdef PCORRECT
elevation *= DEG2RAD;
sinelev = sin(elevation) * SCALE;
#else
sinelev = (elevation / 90.0) * SCALE;
#endif
*xout = XCENTER + sin(azimuth) * sinelev;
*yout = YCENTER - cos(azimuth) * sinelev;
}
static void draw_arc(int x, int y, int diam)
{
XDrawArc(XtDisplay(draww), pixmap, drawGC,
x - diam / 2, y - diam / 2, /* x,y */
diam, diam, /* width, height */
0, 360 * 64 /* angle1, angle2 */
);
}
static int get_status(struct gps_data_t *gpsdata, int satellite)
{
int i;
int s;
for (i = 0; i < 12; i++)
if (satellite == gpsdata->PRN[i]) {
s = gpsdata->ss[i];
if (s<20) return 1;
if (s<40) return 2;
return 7;
}
return 0;
}
void draw_graphics(struct gps_data_t *gpsdata)
{
int i;
double x, y;
char buf[20];
if (SEEN(gpsdata->satellite_stamp)) {
i = min(width, height);
set_color("White");
XFillRectangle(XtDisplay(draww), pixmap, drawGC, 0, 0, width, height);
/* draw something in the center */
set_color("Grey");
draw_arc(width / 2, height / 2, 6);
/* draw the 45 degree circle */
#ifdef PCORRECT
draw_arc(width / 2, height / 2, ((i - RM) * 7) / 10); /* sin(45) ~ 0.7 */
#else
draw_arc(width / 2, height / 2, (i - RM) / 2);
#endif
set_color("Black");
draw_arc(width / 2, height / 2, i - RM);
pol2cart(0, 0, &x, &y);
set_color("Black");
XDrawString(XtDisplay(draww), pixmap, drawGC,
(int) x, (int) y, "N", 1);
pol2cart(90, 0, &x, &y);
set_color("Black");
XDrawString(XtDisplay(draww), pixmap, drawGC,
(int) x+2, (int) y, "E", 1);
pol2cart(180, 0, &x, &y);
set_color("Black");
XDrawString(XtDisplay(draww), pixmap, drawGC,
(int) x, (int) y+10, "S", 1);
pol2cart(270, 0, &x, &y);
set_color("Black");
XDrawString(XtDisplay(draww), pixmap, drawGC,
(int) x-5, (int) y, "W", 1);
/* Now draw the satellites... */
for (i = 0; i < gpsdata->satellites; i++) {
pol2cart(gpsdata->azimuth[i], gpsdata->elevation[i], &x, &y);
switch (get_status(gpsdata, gpsdata->PRN[i]) & 7) {
case 0:
case 1:
set_color("Grey");
break;
case 2:
case 3:
set_color("Yellow");
break;
case 4:
case 5:
case 6:
set_color("Red");
break;
case 7:
set_color("Green");
break;
}
XFillArc(XtDisplay(draww), pixmap, drawGC,
(int) x - 5, (int) y - 5, /* x,y */
11, 11, /* width, height */
0, 360 * 64 /* angle1, angle2 */
);
sprintf(buf, "%02d", gpsdata->PRN[i]);
set_color("Blue");
XDrawString(XtDisplay(draww), pixmap, drawGC,
(int) x + 0, (int) y + 17, buf, 2);
}
XCopyArea(XtDisplay(draww), pixmap, XtWindow(draww), drawGC,
0, 0, width, height, 0, 0);
}
}
void redraw(Widget w, XtPointer client_data, XmDrawingAreaCallbackStruct * cbs)
{
XCopyArea(XtDisplay(draww), pixmap, XtWindow(draww), drawGC,
cbs->event->xexpose.x, cbs->event->xexpose.y,
cbs->event->xexpose.width, cbs->event->xexpose.height,
cbs->event->xexpose.x, cbs->event->xexpose.y);
}
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