不使用GtkBuilder时，搜索在GtkShortcutsWindow中不起作用

Question

我已经创建了一个使用GtkShortcutsWindow显示快捷方式的窗口。但是，我不想加载extern .ui文件，并且使用gtk_builder_new_from_string需要很大的字符串。我通过创建必要的对象并将它们打包到窗口及其容器GtkShortcutsSection和GtkShortcutsGroups中，提出了一个简洁的解决方案。结果看起来就像我将使用gtk_builder_new_from_string一样（我已经尝试过两种方法），但是当不使用GtkBuilder时，窗口顶部的内置搜索将不起作用，不会显示任何结果。我在这里想念什么？这是我的代码的相关部分：

enum { FILE_HNDL_GRP, EDITING_GRP, FIND_GRP, VIEW_GRP, HELP_GRP, NUMBER_OF_SC_GROUPS };

gchar *accels[] = { "", 
                    "<ctrl>N", "<ctrl>O", "<ctrl>S", "<ctrl><shift>S", "<ctrl>Q", 
                    "", 
                    "<ctrl>A", "<ctrl>backslash", "<ctrl>Z", "<ctrl>Y", "<ctrl>T", 
                    "<ctrl>minus", "<ctrl>plus", "<ctrl>B", "<ctrl>R", "<ctrl><shift>R", 
                    "", 
                    "<ctrl>F", "<ctrl>H", 
                    "", 
                    "<shift><ctrl>X", "<shift><ctrl>C", 
                    "", 
                    "<ctrl>L", "<shift><ctrl>A"
                  };

gchar *accel_txts[] = { "File Handling", 
                            "Create a new menu" , "Open a menu", "Save the menu", 
                            "Save the menu as...", "Quit the application", 
                        "Editing", 
                            "Select all visible nodes", "Deselect all visible nodes", "Undo previous edit", 
                            "Redo previous edit", "Move node to the top", "Move node up", "Move node down", 
                            "Move node to the bottom", "Remove node", "Remove children from node", 
                        "Find", 
                            "Show/Hide Find Grid", "Open/Close\nFind & Replace Window", 
                        "View", 
                            "Expand all nodes", "Collapse all nodes", 
                        "Help", 
                            "Open/Close\nShortcuts Window", "About"
                      };

guint8 number_of_shortcuts = sizeof (accels) / sizeof (accels[0]);

GtkShortcutsWindow *shortcuts_window;
GtkShortcutsSection *shortcuts_section;
GtkShortcutsGroup *shortcuts_groups[NUMBER_OF_SC_GROUPS];

guint8 shortcuts_cnt;
gint8 groups_cnt = -1;

shortcuts_window = g_object_new (GTK_TYPE_SHORTCUTS_WINDOW, "modal", TRUE, 
                                                            "resizable", TRUE, 
                                                            "gravity", GDK_GRAVITY_CENTER, 
                                                             NULL);

shortcuts_section = g_object_new (GTK_TYPE_SHORTCUTS_SECTION, "visible", TRUE, "max-height", 12, NULL);
gtk_container_add (GTK_CONTAINER (shortcuts_window), GTK_WIDGET (shortcuts_section));

for (shortcuts_cnt = 0; shortcuts_cnt < number_of_shortcuts; shortcuts_cnt++) {
    if (!(accels[shortcuts_cnt][0] == '<')) {
        groups_cnt++;
        shortcuts_groups[groups_cnt] = g_object_new (GTK_TYPE_SHORTCUTS_GROUP, "title", accel_txts[shortcuts_cnt], NULL);
        gtk_container_add (GTK_CONTAINER (shortcuts_section), GTK_WIDGET (shortcuts_groups[groups_cnt]));
    }
    else {      
        gtk_container_add (GTK_CONTAINER (shortcuts_groups[groups_cnt]), 
                           GTK_WIDGET (g_object_new (GTK_TYPE_SHORTCUTS_SHORTCUT, 
                                                     "accelerator", accels[shortcuts_cnt], 
                                                     "title", accel_txts[shortcuts_cnt], 
                                                     NULL)));
    }
}

gtk_window_set_transient_for (GTK_WINDOW (shortcuts_window), GTK_WINDOW (window));

gtk_widget_show_all (GTK_WIDGET (shortcuts_window));

Answer 1

我在GTK的bugzilla中找到了如何解决此问题的提示。上面的代码中有两件事必须更改：

1. 仅在将快捷方式组添加到快捷方式窗口之后，才应将其添加到快捷方式窗口。
2. 将其添加到快捷方式窗口之前，必须显示其中一个部分。您无法通过阅读文档自行找到答案。为此，我不得不咨询Bugzilla。

下面的代码具有两组，每组一个快捷方式：

enum { FILE_HNDL_GRP, HELP_GRP, NUMBER_OF_SC_GROUPS };

GtkShortcutsWindow *shortcuts_window;
GtkShortcutsSection *shortcuts_section;
GtkShortcutsGroup *shortcuts_groups[NUMBER_OF_SC_GROUPS];

// shortcut_window_elements
char *sc_win_elm[] = { "File Handling", 
                           "<ctrl>N | Create a new menu", 
                        "Help", 
                            "<shift><ctrl>A | About"
                     };

gchar **tokens;
guint8 num_of_sc_win_elm = sizeof (sc_win_elm) / sizeof (sc_win_elm[0]); // number_of_shortcut_window_elements

guint8 sc_win_elm_cnt; // shortcut_window_element_counter
gint8 groups_cnt = -1;

shortcuts_window = g_object_new (GTK_TYPE_SHORTCUTS_WINDOW, "modal", TRUE, 
                                                            "resizable", TRUE, 
                                                            "gravity", GDK_GRAVITY_CENTER, 
                                                            NULL);

shortcuts_section = g_object_new (GTK_TYPE_SHORTCUTS_SECTION, "visible", TRUE, "max-height", 12, NULL);
gtk_widget_show (GTK_WIDGET (shortcuts_section));

// Add shortcut groups and shortcuts.

for (sc_win_elm_cnt = 0; sc_win_elm_cnt < num_of_sc_win_elm; sc_win_elm_cnt++) {
    if (!(strstr (sc_win_elm[sc_win_elm_cnt], "|"))) {       
        groups_cnt++;
        shortcuts_groups[groups_cnt] = g_object_new (GTK_TYPE_SHORTCUTS_GROUP, "title", sc_win_elm[sc_win_elm_cnt], NULL);
        gtk_container_add (GTK_CONTAINER (shortcuts_section), GTK_WIDGET (shortcuts_groups[groups_cnt]));
    }
    else {
        enum { ACCEL, ACCEL_TXT };
        tokens = g_strsplit (sc_win_elm[sc_win_elm_cnt], " | ", -1);

        gtk_container_add (GTK_CONTAINER (shortcuts_groups[groups_cnt]), 
                           GTK_WIDGET (g_object_new (GTK_TYPE_SHORTCUTS_SHORTCUT, 
                                                     "accelerator", tokens[ACCEL], 
                                                     "title", tokens[ACCEL_TXT], 
                                                     NULL)));

        g_strfreev (tokens);
    }
}

gtk_container_add (GTK_CONTAINER (shortcuts_window), GTK_WIDGET (shortcuts_section)); 

gtk_window_set_transient_for (GTK_WINDOW (shortcuts_window), GTK_WINDOW (kwindow));

gtk_widget_show_all (GTK_WIDGET (shortcuts_window));