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

gint eventDelete(GtkWidget *widget,
        GdkEvent *event,gpointer data);
gint eventDestroy(GtkWidget *widget,
        GdkEvent *event,gpointer data);
static GtkWidget *makeWidget();
static gboolean eventDraw(GtkWidget *widget,
        GdkEvent *event,gpointer data);

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

    gnome_init("xgtkpreview","1.0",argc,argv);
    app = gnome_app_new("xgtkpreview","GtkPreview");
    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);

    widget = makeWidget();

    gnome_app_set_contents(GNOME_APP(app),widget);
    gtk_widget_show_all(app);
    gtk_main();
    exit(0);
}
gint eventDelete(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    return(FALSE);
}
gint eventDestroy(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    gtk_main_quit();
    return(0);
}
static GtkWidget *makeWidget()
{
    GtkWidget *preview;

    preview = gtk_preview_new(GTK_PREVIEW_COLOR);
    gtk_preview_size(GTK_PREVIEW(preview),200,100);
    gtk_signal_connect(GTK_OBJECT(preview),"event",
            GTK_SIGNAL_FUNC(eventDraw),NULL);
    return(preview);
}
static gboolean eventDraw(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    GdkGC *gc;
    GdkColor foreground;
    GdkColormap *colormap;

    colormap = gdk_colormap_get_system();
    gc = gdk_gc_new(widget->window);
    gdk_color_parse("blue",&foreground);
    gdk_color_alloc(colormap,&foreground);
    gdk_gc_set_foreground(gc,&foreground);

    gdk_draw_rectangle(widget->window,gc,
            TRUE,20,10,160,80);
    return(TRUE);
}