Refresh compass every 1 sec. Don't snap directly, animate towards real heading.

diff --git a/src/gtkcompass.c b/src/gtkcompass.c
index c8c028d29bae291d39a947eb274015af1ef0040e..7d67efe9ca9960c6ef87a597a5114cc9a3d466f6 100644 (file)
--- a/src/gtkcompass.c
+++ b/src/gtkcompass.c
@@ -28,6 +28,10 @@
 #include <glib-object.h>
 #include "gtkcompass.h"
 
+#if 0
+#define DEBUG
+#endif
+
 static void gtk_compass_finalize (GObject *object);
 static void gtk_compass_size_request (GtkWidget *widget, GtkRequisition *requisition);
 static void gtk_compass_size_allocate (GtkWidget *widget, GtkAllocation *allocate);
@@ -36,6 +40,7 @@ static void gtk_compass_realize (GtkWidget *widget);
 static void gtk_compass_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
 static void gtk_compass_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
 static void gtk_compass_paint(GtkCompass *compass);
+static gboolean gtk_compass_refresh_cb(GtkWidget *widget);
 
 G_DEFINE_TYPE(GtkCompass, gtk_compass, GTK_TYPE_WIDGET);
 
@@ -79,20 +84,20 @@ switch (prop_id) {
 }
 
 static void
-gtk_compass_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec   *pspec)
+gtk_compass_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec   *pspec)
 {
 GtkCompass *compass;
 g_return_if_fail(GTK_IS_COMPASS(object));
 compass=GTK_COMPASS(object);
 switch (prop_id) {
        default:
-               G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+               G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
        break;
 }
 }
 
 static void
-gtk_compass_init (GtkCompass *compass)
+gtk_compass_init(GtkCompass *compass)
 {
 compass->gc_h=NULL;
 compass->gc_d=NULL;
@@ -101,15 +106,21 @@ compass->dest_valid=FALSE;
 compass->way_valid=FALSE;
 compass->width=300;
 compass->height=300;
+compass->esid=0;
 }
 
 static gboolean 
-gtk_compass_cb_button_press(GtkWidget * widget, GdkEventButton * event)
+gtk_compass_cb_button_press(GtkWidget *widget, GdkEventButton *event)
 {
 GtkCompass *compass;
 
 compass=GTK_COMPASS(widget);
 
+#ifdef DEBUG
+compass->data->heading=0;
+compass->heading=180;
+#endif
+
 return FALSE;
 }
 
@@ -122,7 +133,11 @@ GtkWidget *widget;
 compass=gtk_type_new(gtk_compass_get_type ());
 widget=GTK_WIDGET(compass);
 compass->data=data;
+compass->heading=0;
 g_signal_connect(G_OBJECT(widget), "button_press_event", G_CALLBACK(gtk_compass_cb_button_press), NULL);
+
+compass->esid=g_timeout_add(1000,(GSourceFunc)gtk_compass_refresh_cb, compass);
+
 return widget;
 }
 
@@ -133,6 +148,7 @@ GtkCompass *compass;
        
 g_return_if_fail(GTK_IS_COMPASS(object));
 compass=GTK_COMPASS(object);
+g_source_remove(compass->esid);
 
 if (GTK_WIDGET(object)->parent && GTK_WIDGET_MAPPED(object)) {
        gtk_widget_unmap(GTK_WIDGET(object));
@@ -149,7 +165,7 @@ GtkCompass *compass;
 g_return_if_fail(GTK_IS_COMPASS(widget));
 g_return_if_fail(requisition != NULL);
        
-compass = GTK_COMPASS (widget);
+compass=GTK_COMPASS(widget);
        
 requisition->width=400;
 requisition->height=300;
@@ -298,7 +314,7 @@ BOUND(fs, 1, 16);
 
 pango_context_set_matrix (compass->context, NULL);
 
-g_snprintf(htext, 8, "%3.0f°", compass->data->heading);
+g_snprintf(htext, 8, "%3.0f°", compass->heading);
 pango_font_description_set_size(compass->fontdesc, (10+fs) * PANGO_SCALE);
 pango_layout_set_font_description(compass->layout, compass->fontdesc);
 pango_layout_set_text(compass->layout, htext, -1);
@@ -341,7 +357,7 @@ gdk_draw_line(widget->window,
 
 for (i = 0; i < 5; i++) {
        PangoMatrix matrix = PANGO_MATRIX_INIT;
-       dir = (gint) (compass->data->heading / 45) * 45 + angle[i];
+       dir = (gint) (compass->heading / 45) * 45 + angle[i];
 
        switch (dir) {
        case 0:
@@ -377,19 +393,19 @@ for (i = 0; i < 5; i++) {
                break;
        }
 
-       tmp = ((dir - compass->data->heading) * (1.f / 180.f)) * G_PI;
+       tmp = ((dir - compass->heading) * (1.f / 180.f)) * G_PI;
 
        gtk_compass_draw_mark(compass, compass->gc_h, tmp, 6);
 
        x = fsize[i];
-       if (abs((guint) (compass->data->heading / 45) * 45 - compass->data->heading)
-           > abs((guint) (compass->data->heading / 45) * 45 + 45 - compass->data->heading) && (i > 0))
+       if (abs((guint) (compass->heading / 45) * 45 - compass->heading)
+           > abs((guint) (compass->heading / 45) * 45 + 45 - compass->heading) && (i > 0))
                        x = fsize[i - 1];
 
        pango_font_description_set_size(compass->fontdesc, (10 + x + fs) * PANGO_SCALE);
        pango_layout_set_font_description(compass->layout, compass->fontdesc);
        pango_layout_set_text(compass->layout, text, -1);
-       pango_matrix_rotate (&matrix, -(dir-compass->data->heading));
+       pango_matrix_rotate (&matrix, -(dir-compass->heading));
        pango_context_set_matrix (compass->context, &matrix);
        pango_layout_get_pixel_size(compass->layout, &x, &y);
        x = compass->xoffset + hsize + ((hsize + 15 + fs) * sinf(tmp)) - x / 2,
@@ -398,12 +414,12 @@ for (i = 0; i < 5; i++) {
 }
 
 if (compass->dest_valid) {
-       tmp=((compass->dest_heading-compass->data->heading) * (1.f / 180.f)) * G_PI;
+       tmp=((compass->dest_heading-compass->heading) * (1.f / 180.f)) * G_PI;
        gtk_compass_draw_mark(compass, compass->gc_d, tmp, 10);
 }
 
 if (compass->way_valid) {
-       tmp=((compass->way_heading-compass->data->heading) * (1.f / 180.f)) * G_PI;
+       tmp=((compass->way_heading-compass->heading) * (1.f / 180.f)) * G_PI;
        gtk_compass_draw_mark(compass, compass->gc_w, tmp, 10);
 }
 
@@ -423,6 +439,44 @@ gtk_compass_paint(compass);
 return TRUE;
 }
 
+static gboolean
+gtk_compass_refresh_cb(GtkWidget *widget)
+{
+GtkCompass *compass;
+gfloat tmp;
+
+g_return_val_if_fail(GTK_IS_COMPASS(widget), FALSE);
+
+compass=GTK_COMPASS(widget);
+
+if ((GTK_WIDGET_MAPPED(widget)==FALSE) || (GTK_WIDGET_VISIBLE(widget)==FALSE)) {
+       compass->heading=compass->data->heading;
+       return TRUE;
+}
+
+if (compass->heading==compass->data->heading)
+       return TRUE;
+
+tmp=fabsf(compass->heading-compass->data->heading);
+if (tmp>5)
+       tmp=tmp/2.2;
+else
+       compass->heading=compass->data->heading;
+
+if (compass->heading<compass->data->heading)
+       compass->heading+=tmp;
+
+if (compass->heading>compass->data->heading)
+       compass->heading-=tmp;
+
+#ifdef DEBUG
+g_printf("%.2f %.2f\n", compass->heading, compass->data->heading);
+#endif
+
+gtk_widget_queue_draw_area(widget, 0, 0, compass->width, compass->height);
+return TRUE;
+}
+
 void
 gtk_compass_refresh(GtkWidget *widget)
 {

diff --git a/src/gtkcompass.h b/src/gtkcompass.h
index f4e79197d2ff1d86f939260249c161e6d6b94117..e760350620ffa0686c0b22b5e24a47268cbe0683 100644 (file)
--- a/src/gtkcompass.h
+++ b/src/gtkcompass.h
@@ -47,10 +47,12 @@ struct _GtkCompass {
        PangoFontDescription *fontdesc;
 
        GpsData *data;
+       gfloat heading;
        gboolean dest_valid;
        gboolean way_valid;
        gfloat dest_heading;
        gfloat way_heading;
+       gint esid;
 };
 
 struct _GtkCompassClass {