static VALUE
style_paint_polygon(VALUE self, VALUE gdkwindow, VALUE state_type, VALUE shadow_type, VALUE area, VALUE widget, VALUE detail, VALUE points, VALUE fill)
{
int i;
GdkPoint* gpoints = g_new (GdkPoint, RARRAY_LEN(points));
for (i = 0; i < RARRAY_LEN(points); i++){
gpoints[i].x = RARRAY_PTR(RARRAY_PTR(points)[i])[0];
gpoints[i].y = RARRAY_PTR(RARRAY_PTR(points)[i])[1];
}
gtk_paint_polygon(_SELF(self), GDK_WINDOW(RVAL2GOBJ(gdkwindow)),
RVAL2STATE(state_type), RVAL2SHADOW(shadow_type), RVAL2REC(area),
GTK_WIDGET(RVAL2GOBJ(widget)),
NIL_P(detail) ? NULL : RVAL2CSTR(detail), gpoints,
RARRAY_LEN(points), RVAL2CBOOL(fill));
return self;
}
static gboolean
gtk_dial_expose( GtkWidget *widget,
GdkEventExpose *event )
{
GtkDial *dial;
GdkPoint points[6];
gdouble s,c;
gdouble theta, last, increment;
GtkStyle *blankstyle;
gint xc, yc;
gint upper, lower;
gint tick_length;
gint i, inc;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_DIAL (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (event->count > 0)
return FALSE;
dial = GTK_DIAL (widget);
/* gdk_window_clear_area (widget->window,
0, 0,
widget->allocation.width,
widget->allocation.height);
*/
xc = widget->allocation.width / 2;
yc = widget->allocation.height / 2;
upper = (int) dial->adjustment->upper;
lower = (int) dial->adjustment->lower;
/* Erase old pointer */
s = sin (dial->last_angle);
c = cos (dial->last_angle);
dial->last_angle = dial->angle;
points[0].x = (int) ( xc + s*dial->pointer_width/2 );
points[0].y = (int) ( yc + c*dial->pointer_width/2 );
points[1].x = (int) ( xc + c*dial->radius );
points[1].y = (int) ( yc - s*dial->radius );
points[2].x = (int) ( xc - s*dial->pointer_width/2 );
points[2].y = (int) ( yc - c*dial->pointer_width/2 );
points[3].x = (int) ( xc - c*dial->radius/10 );
points[3].y = (int) ( yc + s*dial->radius/10 );
points[4].x = (int) ( points[0].x );
points[4].y = (int) ( points[0].y );
blankstyle = gtk_style_new ();
blankstyle->bg_gc[GTK_STATE_NORMAL] =
widget->style->bg_gc[GTK_STATE_NORMAL];
blankstyle->dark_gc[GTK_STATE_NORMAL] =
widget->style->bg_gc[GTK_STATE_NORMAL];
blankstyle->light_gc[GTK_STATE_NORMAL] =
widget->style->bg_gc[GTK_STATE_NORMAL];
blankstyle->black_gc =
widget->style->bg_gc[GTK_STATE_NORMAL];
gtk_paint_polygon (blankstyle,
widget->window,
GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL,
widget,
NULL,
points, 5,
FALSE);
g_object_unref (blankstyle);
/* Draw ticks */
if ((upper - lower) == 0)
return FALSE;
increment = ( (100*M_PI) / (dial->radius*dial->radius) );
inc = (int) ( (upper - lower) );
while (inc < 100) inc *= 10;
while (inc >= 1000) inc /= 10;
last = (int) ( -1 );
for (i = (int) ( 0 ); i <= inc; i++)
{
theta = (int) ( ((gfloat)i*M_PI / (18*inc/24.) - M_PI/6.) );
if ((theta - last) < (increment))
continue;
last = (int) ( theta );
s = (int) ( sin (theta) );
c = (int) ( cos (theta) );
tick_length = (int) ( (i%(inc/10) == 0) ? dial->pointer_width : dial->pointer_width / 2 );
gdk_draw_line(
widget->window,
widget->style->fg_gc[widget->state],
(int) (xc + c*(dial->radius - tick_length)),
(int) (yc - s*(dial->radius - tick_length)),
(int) (xc + c*dial->radius),
(int) (yc - s*dial->radius)
);
}
/* Draw pointer */
s = ( sin (dial->angle) );
c = ( cos (dial->angle) );
dial->last_angle = ( dial->angle );
points[0].x = (int) ( xc + s*dial->pointer_width/2 );
points[0].y = (int) ( yc + c*dial->pointer_width/2 );
points[1].x = (int) ( xc + c*dial->radius );
points[1].y = (int) ( yc - s*dial->radius );
points[2].x = (int) ( xc - s*dial->pointer_width/2 );
points[2].y = (int) ( yc - c*dial->pointer_width/2 );
points[3].x = (int) ( xc - c*dial->radius/10 );
points[3].y = (int) ( yc + s*dial->radius/10 );
points[4].x = (int) ( points[0].x );
points[4].y = (int) ( points[0].y );
gtk_paint_polygon (
widget->style,
widget->window,
GTK_STATE_NORMAL,
GTK_SHADOW_OUT,
NULL,
widget,
NULL,
points, 5,
TRUE
);
return FALSE;
}