/** arcs.c **/
#include <gnome.h>

gint eventDelete(GtkWidget *widget,
        GdkEvent *event,gpointer data);
gint eventDestroy(GtkWidget *widget,
        GdkEvent *event,gpointer data);
gboolean eventDraw(GtkWidget *widget,
        GdkEvent *event,gpointer data);
static void drawArcs(GtkWidget *widget,gint y,gint fill);

#define WIDTH 455
#define HEIGHT 140

int main(int argc,char *argv[])
{
    GtkWidget *app;
    GtkWidget *area;

    gnome_init("arcs","1.0",argc,argv);
    app = gnome_app_new("arcs",
            "Drawing Circles and Ellipses");
    gtk_container_set_border_width(GTK_CONTAINER(app),20);
    gtk_signal_connect(GTK_OBJECT(app),"delete_event",
            GTK_SIGNAL_FUNC(eventDelete),NULL);
    gtk_signal_connect(GTK_OBJECT(app),"destroy",
            GTK_SIGNAL_FUNC(eventDestroy),NULL);

    area = gtk_drawing_area_new();
    gtk_widget_set_usize(area,WIDTH,HEIGHT);
    gnome_app_set_contents(GNOME_APP(app),area);

    gtk_signal_connect(GTK_OBJECT(area),"event",
            GTK_SIGNAL_FUNC(eventDraw),NULL);

    gtk_widget_show_all(app);
    gtk_main();
    exit(0);
}
gboolean eventDraw(GtkWidget *widget,
        GdkEvent *event,gpointer data) {

    drawArcs(widget,0,FALSE);
    drawArcs(widget,80,TRUE);
    return(TRUE);
}
static void drawArcs(GtkWidget *widget,gint y,gint fill)
{
    gdk_draw_arc(widget->window,
            widget->style->black_gc,
            fill,
            0,y,
            60,60,
            0,360 * 64);
    gdk_draw_arc(widget->window,
            widget->style->black_gc,
            fill,
            80,y,
            60,60,
            135 * 64,90 * 64);
    gdk_draw_arc(widget->window,
            widget->style->black_gc,
            fill,
            110,y,
            60,60,
            135 * 64,-270 * 64);

    gdk_draw_arc(widget->window,
            widget->style->black_gc,
            fill,
            190,y,
            100,60,
            0,360 * 64);
    gdk_draw_arc(widget->window,
            widget->style->black_gc,
            fill,
            310,y,
            100,60,
            135 * 64,90 * 64);
    gdk_draw_arc(widget->window,
            widget->style->black_gc,
            fill,
            350,y,
            100,60,
            135 * 64,-270 * 64);
}
gint eventDelete(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    return(FALSE);
}
gint eventDestroy(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    gtk_main_quit();
    return(0);
}