Gtk /Glade程式設計（三） 選單和工具欄

編寫Gtk+程式碼:
unanao@debian:~/Experiment/Gui/menu-toolbars$ cat check-menu.c
#include

void toggle_statusbar(GtkWidget *widget, gpointer *status_bar)
{
    if (gtk_check_menu_item_get_active(widget))   
    {
        gtk_widget_show(GTK_WIDGET(status_bar));
    }
    else
    {
        gtk_widget_hide(GTK_WIDGET(status_bar));
    }
}

gint main(int argc, char *argv[])
{
    GtkWidget *window;
    GtkBuilder *builder;
    GtkWidget *quit_menu;
    GtkWidget *status_bar;
    GtkWidget *tog_stat;

    gtk_init(&argc, &argv);

    builder = gtk_builder_new();
    gtk_builder_add_from_file(builder, "image-shortcuts.glade", NULL);

    window = GTK_WIDGET(gtk_builder_get_object(builder, "window"));
    quit_menu = GTK_WIDGET(gtk_builder_get_object(builder, "quit_menu"));
    status_bar = GTK_WIDGET(gtk_builder_get_object(builder, "statusbar1"));
    tog_stat = GTK_WIDGET(gtk_builder_get_object(builder, "checkstatus"));

    g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);
    g_signal_connect(G_OBJECT(quit_menu), "activate", G_CALLBACK(gtk_main_quit), NULL);
    g_signal_connect(G_OBJECT(tog_stat), "activate", G_CALLBACK(toggle_statusbar), status_bar);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}

這樣點選紅色的關閉按鈕，就可以關閉這個視窗。

五、撤銷 重做
與四中新增“新建”中的方法相同，新增“撤銷”和“重做”按鈕。
編寫程式碼:
unanao@debian:~/Experiment/gui/menu-toolbars$ cat undo-redo.c
/**
 * @file undo_redo.c
 * @brief Simple Toolbar
 * @author unanao
 * @version 0.1
 * @date 2011-02-28
 */
#include
#include
#include

void undo_redo(GtkWidget *widget, gpointer item)
{
    static int count = 2;
    const char *name = gtk_widget_get_name(GTK_WIDGET(widget));
   
    if (strcmp(name, "undo") == 0)
    {
        count--;
    }
    else if (strcmp(name, "redo") == 0)
    {
        count++ ;
    }
    else
    {
        exit(1); //If the name is not "undo" and "redo" , it means that parameter is error
    }

    if (count < 0)
    {
        gtk_widget_set_sensitive(widget, FALSE);
        gtk_widget_set_sensitive(item, TRUE);       
    }
    else if (count > 5)
    {
        gtk_widget_set_sensitive(widget, FALSE);
        gtk_widget_set_sensitive(item, TRUE);       
    }

}

int main(int argc, char *argv[])
{
    GtkWidget *window;
    GtkToolItem *quit;
    GtkWidget *undo;
    GtkToolItem *redo;
    GtkBuilder *builder;

    gtk_init(&argc, &argv);

   
    builder = gtk_builder_new();
    gtk_builder_add_from_file(builder, "toolbar.glade", NULL);

    window = GTK_WIDGET(gtk_builder_get_object(builder, "window"));   
    quit = GTK_TOOL_ITEM(gtk_builder_get_object(builder, "quit"));
    undo = (gtk_builder_get_object(builder, "undo"));
    redo = GTK_TOOL_ITEM(gtk_builder_get_object(builder, "redo"));
    //undo = (gtk_builder_get_object(builder, "undo"));
    //redo = (gtk_builder_get_object(builder, "redo"));
    //printf below is used for debugging
    printf("undo: %s\n", gtk_widget_get_name(undo));
    printf("quit: %s\n", gtk_widget_get_name(quit));
    printf("window: %s\n", gtk_widget_get_name(window));

    gtk_widget_show_all(window);

    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
    //Attention please, here is "clicked"
    g_signal_connect(quit, "clicked", G_CALLBACK(gtk_main_quit), NULL);
    g_signal_connect(undo, "clicked", G_CALLBACK(undo_redo), redo);
    g_signal_connect(redo, "clicked", G_CALLBACK(undo_redo), undo);

    gtk_main();
   
    return 0;
}
gtk_widget_get_name存在一個bug：https://bugzilla.gnome.org/show_bug.cgi?id=614782。還沒有想好解決辦法。如果真的需要可以是這是用gtk+程式設計，而不是直接使用glade.