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

GtkWidget *makeColorBox();
void showColorsel(GtkWidget *widget,gpointer data);
void changeColor(GtkWidget *widget,
        GtkColorSelection *colorSel);
void destroyColorsel(GtkWidget *widget,
        gpointer data);
void helpColorsel(GtkWidget *widget,gpointer data);

gint eventDelete(GtkWidget *widget,
        GdkEvent *event,gpointer data);
gint eventDestroy(GtkWidget *widget,
        GdkEvent *event,gpointer data);

static GtkWidget *csDialog = NULL;
static GtkWidget *area;

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

    gnome_init("selection","1.0",argc,argv);
    app = gnome_app_new("selection","Color Selection");
    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);

    colorBox = makeColorBox();

    gnome_app_set_contents(GNOME_APP(app),colorBox);
    gtk_widget_show_all(app);
    gtk_main();
    exit(0);
}
GtkWidget *makeColorBox()
{
    GtkWidget *colorbox;
    GtkWidget *button;

    colorbox = gtk_vbox_new(FALSE,0);
    gtk_container_set_border_width(
            GTK_CONTAINER(colorbox),10);

    area = gtk_drawing_area_new();
    gtk_widget_set_usize(area,300,200);
    gtk_box_pack_start(GTK_BOX(colorbox),
            area,FALSE,FALSE,0);

    button = gtk_button_new_with_label("Select");
    gtk_box_pack_start(GTK_BOX(colorbox),
            button,FALSE,FALSE,0);
    gtk_signal_connect(GTK_OBJECT(button),"clicked",
            GTK_SIGNAL_FUNC(showColorsel),NULL);

    return(colorbox);
}
void showColorsel(GtkWidget *widget,gpointer data) {
    GtkWidget *colorSel;
    GtkWidget *button;

    if(csDialog == NULL) {
        csDialog = gtk_color_selection_dialog_new(
                "Selected color fills the rectangle");
        gtk_signal_connect(GTK_OBJECT(csDialog),
                "destroy",
                GTK_SIGNAL_FUNC(destroyColorsel),NULL);

        colorSel =
            GTK_COLOR_SELECTION_DIALOG(csDialog)->colorsel;
        gtk_signal_connect(GTK_OBJECT(colorSel),
                "color_changed",
                GTK_SIGNAL_FUNC(changeColor),colorSel);

        button = GTK_COLOR_SELECTION_DIALOG(
                    csDialog)->ok_button;
        gtk_signal_connect(GTK_OBJECT(button),"clicked",
                GTK_SIGNAL_FUNC(destroyColorsel),NULL);
        button = GTK_COLOR_SELECTION_DIALOG(
                    csDialog)->cancel_button;
        gtk_signal_connect(GTK_OBJECT(button),"clicked",
                GTK_SIGNAL_FUNC(destroyColorsel),NULL);
        button = GTK_COLOR_SELECTION_DIALOG(
                    csDialog)->help_button;
        gtk_signal_connect(GTK_OBJECT(button),"clicked",
                GTK_SIGNAL_FUNC(helpColorsel),NULL);
    }
    gtk_widget_show(csDialog);
}
void changeColor(GtkWidget *widget,
        GtkColorSelection *colorSel) {
    gdouble colorArray[4];
    GdkColor color;
    GdkColormap *colormap;

    gtk_color_selection_get_color(colorSel,colorArray);
    color.red = (gushort)(0xFFFFF * colorArray[0]);
    color.green = (gushort)(0xFFFFF * colorArray[1]);
    color.blue = (gushort)(0xFFFFF * colorArray[2]);
    colormap = gdk_colormap_get_system();
    gdk_color_alloc(colormap,&color);
    gdk_window_set_background(area->window,&color);
    gdk_window_clear(area->window);
}
void destroyColorsel(GtkWidget *widget,gpointer data) {
    if(csDialog != NULL) {
        gtk_widget_destroy(csDialog);
        csDialog = NULL;
    }
}
void helpColorsel(GtkWidget *widget,gpointer data) {
    gnome_ok_dialog("Sorry.\nNo help available");
}
gint eventDelete(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    return(FALSE);
}
gint eventDestroy(GtkWidget *widget,
        GdkEvent *event,gpointer data) {
    gtk_main_quit();
    return(0);
}