1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
#include <stdio.h>
#include <math.h>
#include "gps.h"
#include "config.h"
#include "display.h"
#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;
static 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;
}
static void pol2cart(double azimuth, double elevation, int *xout, int *yout)
{
azimuth *= DEG_2_RAD;
#ifdef PCORRECT
elevation = sin((90.0 - elevation) * DEG_2_RAD);
#else
elevation = ((90.0 - elevation) / 90.0);
#endif
*xout = (int)((width/2) + sin(azimuth) * elevation * (diameter/2));
*yout = (int)((height/2) - cos(azimuth) * elevation * (diameter/2));
}
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 */
}
void draw_graphics(struct gps_data_t *gpsdata)
{
int i, 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) * 0.7); /* sin(45) ~ 0.7 */
#else
draw_arc(width / 2, height / 2, (i - RM) * 0.5);
#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, x, y, "N", 1);
pol2cart(90, 0, &x, &y);
set_color("Black");
XDrawString(XtDisplay(draww),pixmap, drawGC, x+2, y, "E", 1);
pol2cart(180, 0, &x, &y);
set_color("Black");
XDrawString(XtDisplay(draww),pixmap, drawGC, x, y+10, "S", 1);
pol2cart(270, 0, &x, &y);
set_color("Black");
XDrawString(XtDisplay(draww),pixmap, drawGC, x-5,y, "W", 1);
/* Now draw the satellites... */
for (i = 0; i < gpsdata->satellites; i++) {
pol2cart(gpsdata->azimuth[i], gpsdata->elevation[i], &x, &y);
if (gpsdata->ss[i] < 20)
set_color("Grey");
else if (gpsdata->ss[i] < 40)
set_color("Yellow");
else
set_color("Green");
XFillArc(XtDisplay(draww), pixmap, drawGC,
x - 5, 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, x, y + 17, buf, 2);
if (gpsdata->ss[i]) {
set_color("Black");
XDrawPoint(XtDisplay(draww), pixmap, drawGC, x, y);
}
}
XCopyArea(XtDisplay(draww), pixmap, XtWindow(draww), drawGC,
0, 0, width, height, 0, 0);
}
}
void redraw(Widget w UNUSED, XtPointer client_data UNUSED,
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);
}
|
