/* * * Sample Code for Gtk+ Programming in C, 1st Edition, Prentice Hall * * Copyright 2000 - 2002 Syd Logan, All Rights Reserved * * This code is distributed without warranty. You are free to use this * code for any purpose, however, if this code is republished or * redistributed in its original form, as hardcopy or electronically, * then you must include this copyright notice along with the code. * * Questions or comments regarding this code or any bugs it contains can * be directed to the author via e-mail at slogan@cts.com **/#include <gtk/gtk.h>voidGetColorSel( GtkWidget *widget, GtkWidget *colorsel ){  GtkColorSelection *csel = GTK_COLOR_SELECTION( colorsel );  gdouble color[4];  gtk_color_selection_get_color(csel, color);  printf( "r %d g %d b %d opacity %f\n", (int)( color[0] * 255 ),     (int) (color[1] * 255), (int) (color[2] * 255 ), color[3]);}main( int argc, char *argv[] ){  GtkWidget *frame, *button, *colorsel, *colorsel2, *dialog_window;  gtk_init( &argc, &argv );  dialog_window = gtk_dialog_new();  gtk_window_position(GTK_WINDOW (dialog_window), GTK_WIN_POS_MOUSE);  frame = gtk_frame_new( "Foreground Color" );  gtk_box_pack_start(GTK_BOX (GTK_DIALOG (dialog_window)->vbox),     frame, FALSE, FALSE, 2);  colorsel = gtk_color_selection_new();  gtk_color_selection_set_opacity( GTK_COLOR_SELECTION(colorsel), TRUE );  gtk_container_add( GTK_CONTAINER( frame ), colorsel );  frame = gtk_frame_new( "Background Color" );  gtk_box_pack_start(GTK_BOX (GTK_DIALOG (dialog_window)->vbox),     frame, FALSE, FALSE, 2);  colorsel2 = gtk_color_selection_new();  gtk_container_add( GTK_CONTAINER( frame ), colorsel2 );  button = gtk_button_new_with_label ("Ok");  gtk_signal_connect_object(GTK_OBJECT (button), "clicked",    GTK_SIGNAL_FUNC(gtk_widget_destroy), GTK_OBJECT(dialog_window));  gtk_box_pack_start(GTK_BOX (GTK_DIALOG (dialog_window)->action_area),    button, FALSE, FALSE, 0);  button = gtk_button_new_with_label ("Cancel");  gtk_signal_connect(GTK_OBJECT (button), "clicked",    GTK_SIGNAL_FUNC(GetColorSel), colorsel );  gtk_box_pack_start(GTK_BOX (GTK_DIALOG (dialog_window)->action_area),    button, FALSE, FALSE, 0);  gtk_widget_show_all(dialog_window);  gtk_widget_hide( GTK_COLOR_SELECTION(colorsel2)->opacity_label );  gtk_widget_hide( GTK_COLOR_SELECTION(colorsel2)->scales[6] );  gtk_widget_hide( GTK_COLOR_SELECTION(colorsel2)->entries[6] );  gtk_main();}