Marc Balmer's souped-up xgps presentation.

1 files changed, 182 insertions, 136 deletions

diff --git a/display.c b/display.c
index e2dc2d16..7a63a12b 100644
--- a/display.c
+++ b/display.c
@@ -1,17 +1,39 @@
-/* $Id$ */
+/* $gpsd: display.c 4106 2006-12-07 23:55:10Z esr $ */
+
+/*
+ * Copyright (c) 2007 Marc Balmer <marc@msys.ch>
+ * Copyright (c) 2006 Eric S. Raymond
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
 #include <sys/types.h>
-#include <stdio.h>
+
 #include <math.h>
+#include <stdio.h>
+
+#include <X11/Intrinsic.h>
+#include <Xm/Xm.h>
+
+#include <gps.h>
 
-#include "gpsd_config.h"
-#include "gps.h"
 #include "display.h"
 
 #define RM		20
-#define IDIAM		5	/* satekllite icon diameter */
+#define IDIAM		5	/* satellite icon diameter */
 
 #undef min
-#define min(a,b) ((a) < (b) ? (a) : (b))
+#define min(a, b) ((a) < (b) ? (a) : (b))
 
 static Widget draww;
 static GC drawGC;
@@ -20,168 +42,192 @@ static int diameter;
 static Pixmap pixmap;
 
 /*@ -usedef -compdef -mustfreefresh @*/
-static void set_color(String color)
+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)==0) {
-	char buf[32];
-
-	(void)snprintf(buf, sizeof(buf), "Can't alloc %s", color);
-	XtWarning(buf);
-	return;
-    }
-    (void)XSetForeground(dpy, drawGC, col.pixel);
+	Display *dpy = XtDisplay(draww);
+	Colormap cmap = DefaultColormapOfScreen(XtScreen(draww));
+	XColor col, unused;
+
+	if (XAllocNamedColor(dpy, cmap, color, &col, &unused)==0) {
+		char buf[32];
+
+		(void)snprintf(buf, sizeof(buf), "Can't alloc %s", color);
+		XtWarning(buf);
+		return;
+	}
+	(void)XSetForeground(dpy, drawGC, col.pixel);
 }
 /*@ +usedef @*/
 
-void register_canvas(Widget w, GC gc)
+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,
-			   (unsigned int)DefaultDepthOfScreen(XtScreen(w)));
-    set_color("White");
-    (void)XFillRectangle(XtDisplay(draww), pixmap, drawGC, 0,0, width,height);
-    diameter = min(width, height) - RM;
+	draww = w;
+	drawGC = gc;
+	Display *dpy = XtDisplay(w);
+
+	XtVaGetValues(w, XmNwidth, &width, XmNheight, &height, NULL);
+
+	if (pixmap)
+		XFreePixmap(dpy, pixmap);
+	pixmap = XCreatePixmap(dpy, RootWindowOfScreen(XtScreen(w)),
+	    width, height, (unsigned int)DefaultDepthOfScreen(XtScreen(w)));
+	set_color("White");
+	(void)XFillRectangle(XtDisplay(draww), pixmap, drawGC, 0,0, width, height);
+	diameter = min(width, height) - RM;
 }
 
-static void pol2cart(double azimuth, double elevation, 
-		     /*@out@*/int *xout, /*@out@*/int *yout)
+static void
+pol2cart(double azimuth, double elevation, int *xout, int *yout)
 {
-    azimuth *= DEG_2_RAD;
+	azimuth *= DEG_2_RAD;
 #ifdef PCORRECT
-    elevation = sin((90.0 - elevation) * DEG_2_RAD);
+	elevation = sin((90.0 - elevation) * DEG_2_RAD);
 #else
-    elevation = ((90.0 - elevation) / 90.0);
+	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));
+	*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, unsigned int diam)
+static void
+draw_arc(int x, int y, unsigned int diam)
 {
-    (void)XDrawArc(XtDisplay(draww), pixmap, drawGC,
-	     x - diam / 2, y - diam / 2,	/* x,y */
-	     diam, diam,	/* width, height */
-	     0, 360 * 64);	/* angle1, angle2 */
+    (void)XDrawArc(XtDisplay(draww), pixmap, drawGC, 
+		   x - diam / 2, y - diam / 2,        /* x,y */
+		   diam, diam,        /* width, height */
+		   0, 360 * 64);      /* angle1, angle2 */
 }
 /*@ +compdef @*/
 
-void draw_graphics(struct gps_data_t *gpsdata)
+void
+draw_graphics(struct gps_data_t *gpsdata)
 {
-    int i, x, y;
-    char buf[20];
+	Display *dpy = XtDisplay(draww);
+	int i, x, y;
+	char buf[20];
 
-    if (gpsdata->satellites != 0) {
-	i = (int)min(width, height);
+	if (gpsdata->satellites != 0) {
+		i = (int)min(width, height);
 
-	set_color("White");
-	(void)XFillRectangle(XtDisplay(draww),pixmap,drawGC,0,0,width,height);
+		set_color("White");
+		(void)XFillRectangle(dpy, pixmap, drawGC, 0, 0, width, height);
 
-	/* draw something in the center */
-	set_color("Grey");
-	draw_arc(width / 2, height / 2, 6);
+		/* draw something in the center */
+		set_color("Grey");
+		draw_arc(width / 2, height / 2, 6);
 
-	/* draw the 45 degree circle */
+		/* draw the 45 degree circle */
 #ifdef PCORRECT
 #define FF	0.7 /* sin(45) ~ 0.7 */
 #else
 #define FF	0.5
 #endif
-	draw_arc(width / 2, height / 2, (unsigned)((i - RM) * FF));
+		draw_arc(width / 2, height / 2, (unsigned)((i - RM) * FF));
 #undef FF
 
-	set_color("Black");
-	draw_arc(width / 2, height / 2, (unsigned)(i - RM));
-
-	pol2cart(0, 0, &x, &y);
-	set_color("Black");
-	(void)XDrawString(XtDisplay(draww),pixmap, drawGC, x, y, "N", 1);
-	pol2cart(90, 0, &x, &y);
-	set_color("Black");
-	(void)XDrawString(XtDisplay(draww),pixmap, drawGC, x+2, y, "E", 1);
-	pol2cart(180, 0, &x, &y);
-	set_color("Black");
-	(void)XDrawString(XtDisplay(draww),pixmap, drawGC, x, y+10, "S", 1);
-	pol2cart(270, 0, &x, &y);
-	set_color("Black");
-	(void)XDrawString(XtDisplay(draww),pixmap, drawGC, x-5,y, "W", 1);
-
-	/* Now draw the satellites... */
-	for (i = 0; i < gpsdata->satellites; i++) {
-	    pol2cart((double)gpsdata->azimuth[i], 
-		     (double)gpsdata->elevation[i], 
-		     &x, &y);
-	    if (gpsdata->ss[i] < 10) 
 		set_color("Black");
-	    else if (gpsdata->ss[i] < 30)
-		set_color("Red");
-	    else if (gpsdata->ss[i] < 35)
-		set_color("Yellow");
-	    else if (gpsdata->ss[i] < 40)
-		set_color("Green3");
-	    else
-		set_color("Green1");
-	    if (gpsdata->PRN[i] > GPS_PRNMAX) {
-		/* SBAS satellites */
-		XPoint vertices[5];
-		/*@ -type @*/
-		vertices[0].x = x;
-		vertices[0].y = y-IDIAM;
-		vertices[1].x = x+IDIAM;
-		vertices[1].y = y;
-		vertices[2].x = x;
-		vertices[2].y = y+IDIAM;
-		vertices[3].x = x-IDIAM;
-		vertices[3].y = y;
-		vertices[4].x = x;
-		vertices[4].y = y-IDIAM;
-		/*@ +type -compdef @*/
-		if (gpsdata->used[i])
-		    (void)XFillPolygon(XtDisplay(draww), pixmap, drawGC,
-				       vertices, 5, Convex, CoordModeOrigin);
-		else
-		    (void)XDrawLines(XtDisplay(draww), pixmap, drawGC,
-				     vertices, 5, CoordModeOrigin);
-	    } else {
-		/* ordinary GPS satellites */
-		if (gpsdata->used[i])
-		    (void)XFillArc(XtDisplay(draww), pixmap, drawGC,
-			   x - IDIAM, y - IDIAM,	/* x,y */
-			   2*IDIAM+1, 2*IDIAM+1,	/* width, height */
-			   0, 360 * 64			/* angle1, angle2 */
-			);
-		else
-		    (void)XDrawArc(XtDisplay(draww), pixmap, drawGC,
-			   x - IDIAM, y - IDIAM,	/* x,y */
-			   2*IDIAM+1, 2*IDIAM+1,	/* width, height */
-			   0, 360 * 64			/* angle1, angle2 */
-			);
-	    }
-	    /*@ +compdef @*/
-	    (void)snprintf(buf, sizeof(buf), "%-3d", gpsdata->PRN[i]);
-	    set_color("Black");
-	    (void)XDrawString(XtDisplay(draww), pixmap, drawGC, x,y+17, buf,3);
-		
+		draw_arc(width / 2, height / 2, (unsigned)(i - RM));
+
+		pol2cart(0, 0, &x, &y);
+		set_color("Black");
+		(void)XDrawString(dpy, pixmap, drawGC, x, y, "N", 1);
+		pol2cart(90, 0, &x, &y);
+		set_color("Black");
+		(void)XDrawString(dpy, pixmap, drawGC, x + 2, y, "E", 1);
+		pol2cart(180, 0, &x, &y);
+		set_color("Black");
+		(void)XDrawString(dpy, pixmap, drawGC, x, y + 10, "S", 1);
+		pol2cart(270, 0, &x, &y);
+		set_color("Black");
+		(void)XDrawString(dpy, pixmap, drawGC, x - 5, y, "W", 1);
+
+		/* Now draw the satellites... */
+		for (i = 0; i < gpsdata->satellites; i++) {
+			pol2cart((double)gpsdata->azimuth[i], 
+			    (double)gpsdata->elevation[i], &x, &y);
+			if (gpsdata->ss[i] < 10) 
+				set_color("Black");
+			else if (gpsdata->ss[i] < 30)
+				set_color("Red");
+			else if (gpsdata->ss[i] < 35)
+				set_color("Yellow");
+			else if (gpsdata->ss[i] < 40)
+				set_color("Green3");
+			else
+				set_color("Green1");
+			if (gpsdata->PRN[i] > GPS_PRNMAX) {
+				/* SBAS satellites */
+				XPoint vertices[5];
+				/*@ -type @*/
+
+				vertices[0].x = x;
+				vertices[0].y = y-IDIAM;
+				vertices[1].x = x+IDIAM;
+				vertices[1].y = y;
+				vertices[2].x = x;
+				vertices[2].y = y+IDIAM;
+				vertices[3].x = x-IDIAM;
+				vertices[3].y = y;
+				vertices[4].x = x;
+				vertices[4].y = y-IDIAM;
+				/*@ +type -compdef @*/
+
+				if (gpsdata->used[i])
+				    (void)XFillPolygon(dpy, pixmap, drawGC,
+					    vertices, 5, Convex,
+					    CoordModeOrigin);
+				else
+				    (void)XDrawLines(dpy, pixmap, drawGC,
+					    vertices, 5, CoordModeOrigin);
+			} else {
+				/* ordinary GPS satellites */
+				if (gpsdata->used[i])
+				    (void)XFillArc(dpy, pixmap, drawGC,
+					    x - IDIAM,
+					    y - IDIAM, 2 * IDIAM + 1,
+					    2 * IDIAM + 1, 0, 360 * 64);
+				else
+				    (void)XDrawArc(dpy, pixmap, drawGC, 
+					    x - IDIAM,
+					    y - IDIAM, 2 * IDIAM + 1,
+					    2 * IDIAM + 1, 0, 360 * 64);
+			}
+			snprintf(buf, sizeof(buf), "%-3d", gpsdata->PRN[i]);
+			set_color("Black");
+			(void)XDrawString(dpy, pixmap, drawGC, x, y+17, buf, 3);
+
+		}
+		(void)XCopyArea(dpy, pixmap, XtWindow(draww), drawGC,
+		    0, 0, width, height, 0, 0);
 	}
-	(void)XCopyArea(XtDisplay(draww), pixmap, XtWindow(draww), drawGC,
-		  0, 0, width, height, 0, 0);
-    }
 }
 
-void redraw(Widget w UNUSED, XtPointer client_data UNUSED,
-	    XmDrawingAreaCallbackStruct * cbs)
+void
+redraw(Widget widget, XtPointer client_data, XtPointer call_data)
+{
+	XmDrawingAreaCallbackStruct *cbs =
+	    (XmDrawingAreaCallbackStruct *)call_data;
+	Dimension w, h;
+	XEvent *event = cbs->event;
+	Display *dpy = event->xany.display;
+
+	XCopyArea(dpy, 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);
+}
+
+void
+resize(Widget widget, XtPointer client_data, XtPointer call_data)
 {
-    (void)XCopyArea(XtDisplay(draww), pixmap, XtWindow(draww), drawGC,
-	      cbs->event->xexpose.x, cbs->event->xexpose.y,
-	      (unsigned int)cbs->event->xexpose.width, 
-	      (unsigned int)cbs->event->xexpose.height,
-	      cbs->event->xexpose.x, cbs->event->xexpose.y);
+	GC gc;
+	XmDrawingAreaCallbackStruct *cbs =
+	    (XmDrawingAreaCallbackStruct *)call_data;
+
+	XtVaGetValues(widget,
+	    XmNuserData, 	&gc,
+	    NULL);
+	register_canvas(widget, gc);
 }
-/*@ +mustfreefresh @*/