/* * * 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>GtkWidget *callerbutton;intDoHelpSystem( const char *text ){  printf( "Help is %s\n", text );}static ginttips_query_widget_selected(GtkWidget *tips_query, GtkWidget *widget,  const gchar *tip_text, const gchar *tip_private,   GdkEventButton *event, gpointer func_data){  if (event->type == GDK_BUTTON_RELEASE )    return FALSE;  if ( tip_private != (char *) NULL )    DoHelpSystem( tip_private );  return FALSE;}main( int argc, char *argv[] ){  GtkWidget *dialog_window, *button, *tipsq;  GtkTooltips *tips;  gtk_init( &argc, &argv );  dialog_window = gtk_dialog_new();  gtk_window_position(GTK_WINDOW(dialog_window), GTK_WIN_POS_MOUSE);  button = gtk_button_new_with_label("Button that needs help");  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog_window)->vbox),     button, TRUE, TRUE, 0);  gtk_widget_show( button );  tips = gtk_tooltips_new();  gtk_tooltips_set_tip(GTK_TOOLTIPS(tips), button,     "Click on this button to do something", "help:button1" );   tipsq = gtk_tips_query_new();//  gtk_tips_query_set_labels(tipsq, "inactive!!!!", "no tips!!!!" );  gtk_signal_connect_object (GTK_OBJECT (tipsq), "widget_selected",    GTK_SIGNAL_FUNC(tips_query_widget_selected), GTK_OBJECT(tipsq));  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog_window)->vbox),     tipsq, TRUE, TRUE, 0);  gtk_widget_show( tipsq );  callerbutton = button =     gtk_button_new_with_label("Button that doesn't need help");  gtk_box_pack_start (GTK_BOX (GTK_DIALOG (dialog_window)->vbox),     button, TRUE, TRUE, 0);//  gtk_tips_query_set_caller(tipsq, callerbutton );  gtk_tooltips_set_tip(GTK_TOOLTIPS(tips), button,     "Click on this button to do something also", "help:button2" );   gtk_widget_show( button );  button = gtk_button_new_with_label( "Click to enter query mode!" );  gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog_window)->action_area),     button, TRUE, TRUE, 0);  gtk_tooltips_set_tip(GTK_TOOLTIPS(tips), button,     "Click on this button to do something also", "help:button3" );   gtk_widget_show( button );  gtk_tips_query_set_caller(GTK_TIPS_QUERY(tipsq), callerbutton );  gtk_signal_connect_object (GTK_OBJECT (button), "clicked",    GTK_SIGNAL_FUNC(gtk_tips_query_start_query),   GTK_OBJECT (tipsq));  gtk_widget_show(dialog_window);  gtk_main();}