ruby-****@sourc*****
ruby-****@sourc*****
2012年 10月 25日 (木) 06:40:05 JST
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REMOTE_ADDR = 184.145.49.94
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URL = http://ruby-gnome2.sourceforge.jp/hiki.cgi?tut-gtk2-mnstbs-popup
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In this chapter we will learn how to create pop-up menus, menu bars, and toolbars. We will begin by creating each of these manually to see how these widgets are constructed, and what are the principles and concepts on which the toolbars and menus are built. After that we will introduce the Gtk::UIManager, which allows us to dynamically construct a user interface (menus and toolbars) from UI definitions stored in XML files. Each UI file is loaded into the GTK system, and each element applied to a corresponding ((*action*))object, which is responsible for item's presentation on the display and for its behaviour (actions).
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-:Jump ahead:
- * ((<Creating a Pop-up Menu|tut-gtk2-mnstbs-popup#Creating a Pop-up Menu>))
- * ((<Keyboard Accelerators|tut-gtk2-mnstbs-popup#Keyboard Accelerators>))
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You will begin this chapter by learning how to create a pop-up menu. A pop-up menu is a Gtk::Menu widget that is displayed to the user when the right mouse button is clicked when hovering above certain widgets. Some widgets such as Gtk::Entry and Gtk::TextView, already have a pop-up menus built into the widget by default.
If you want to change the pop-up menu of a widget that offers one by default, you should edit the supplied Gtk::Menu widget in the pop-up callback procedure, i.e. block or proc. For example, both Gtk::Entry and Gtk::TextView have a((*populate-popup*))signal, which receives the Gtk::Menu that is going to be displayed. You can edit this menu in any way you see fit before displaying it to the user.