asp.net vb qr code ADDITIONAL GTK+ WIDGETS in Font

Generation Data Matrix in Font ADDITIONAL GTK+ WIDGETS

CHAPTER 12 ADDITIONAL GTK+ WIDGETS
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A central class called GtkRecentManager handles recent file information. It is possible to create your own from scratch, but if you want to share recent files across applications, you can retrieve the default with gtk_recent_manager_get_default(). This will allow you to share recent files with applications such as GEdit, GNOME s recent documents menu, and others that take advantage of the GtkRecentManager API. We next create a new GtkRecentChooserMenu widget from the default GtkRecentManager. This menu displays recent files and will optionally number the menu items created with gtk_recent_chooser_menu_new_for_manager(). The files are not numbered by default, but this property can be changed by setting show-numbers to TRUE or by calling gtk_recent_chooser_ menu_set_show_numbers(). GtkRecentChooserMenu implements the GtkRecentChooser interface, which provides the functionality you will need for interacting with the widget. In Listing 12-7, a number of GtkRecentChooser properties are used to customize the menu. These also apply to two other widgets that implement the GtkRecentChooser interface: GtkRecentChooserDialog and GtkRecentChooserWidget. It is possible that recent files in the list have been removed since they were added. In this case, you may not want to display them in the list. You can hide recent files that no longer exist with gtk_recent_chooser_set_show_not_found(). This property will only work with files that are located on the local machine.
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Tip You may actually want to show files that are not found to the user. If the user selects a file that does
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not exist, you can then easily remove it from the list after informing the user about the problem.
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By default, only local files are shown, which means that they will have a Uniform Resource Identifier (URI) prefix of file://. A URI is used to refer to things such as file locations or Internet addresses based on their prefixes. Using only the file:// prefix will guarantee that they are located on the local machine. You can set this property to FALSE in order to show recent files that are located at a remote location. You should note that remote files are not filtered out if they no longer exist! If the list includes a large number of recent files, you will probably not want to list all of them in the menu. A menu with a hundred items is quite large! Therefore, you can use gtk_recent_chooser_set_limit() to set a maximum number of recent items that will be displayed in the menu. void gtk_recent_chooser_set_limit (GtkRecentChooser *chooser, gint limit);
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CHAPTER 12 ADDITIONAL GTK+ WIDGETS
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When you set a limit on the number of elements, which files are shown depends on the sort type you defined with gtk_recent_chooser_set_sort_type(). By default, this is set to GTK_RECENT_SORT_NONE. The available values in the GtkRecentSortType enumeration follow: GTK_RECENT_SORT_NONE: The list of recent files is not sorted at all and will be returned in the order that they appear. This should not be used when you are limiting the number of elements that are displayed, because you cannot predict which files will be displayed! GTK_RECENT_SORT_MRU: Sort the most recently added files first in the list. This is most likely the sorting method you will want to use, because it places the most recent file at the beginning of the list. GTK_RECENT_SORT_LRU: Sort the least-recently added files first in the list. GTK_RECENT_SORT_CUSTOM: Use a custom sorting function to sort the recent files. To use this, you will need to use gtk_recent_manager_set_sort_func() to define the sorting function to use. The last part of this example saves the file under the specified name. When a file is opened in this text editor, the window title is set to the file name. This file name is used to save the file. Therefore, be careful because this simple text editor cannot be used to create new files!
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Recent Chooser Menu
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You have just learned about the GtkRecentChooserMenu widget. Listing 12-8 implements the selection-done callback function that was connected in Listing 12-7. This function retrieves the selected URI and opens the file if it exists. Listing 12-8. Using GtkRecentChooserMenu /* A menu item was activated. So, retrieve the file URI and open it. */ static void menu_activated (GtkMenuShell *menu, Widgets *w) { GtkTextBuffer *buffer; gchar *filename, *content, *fn; gsize length; filename = gtk_recent_chooser_get_current_uri (GTK_RECENT_CHOOSER (menu));
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