MENUS AND TOOLBARS in Font

Generation ECC200 in Font MENUS AND TOOLBARS

CHAPTER 9 MENUS AND TOOLBARS
Encoding Data Matrix In None
Using Barcode maker for Font Control to generate, create Data Matrix 2d barcode image in Font applications.
www.OnBarcode.com
Barcode Creation In None
Using Barcode maker for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Keyboard accelerators are stored as an instance of GtkAccelGroup. In order to implement accelerators in your application, you need to create a new accelerator group with gtk_accel_ group_new(). This accelerator group must be added to the GtkWindow where the menu will appear for it to take effect. It must also be associated with any menus that take advantage of its accelerators. In Listing 9-3, this is performed immediately after creating the GtkAccelGroup with gtk_window_add_accel_group() and gtk_menu_set_accel_group(). It is possible to manually create keyboard accelerators with GtkAccelMap, but in most cases, gtk_widget_add_accelerator() will provide all of the necessary functionality. The only problem that this method presents is that the user cannot change keyboard accelerators created with this function during runtime. void gtk_widget_add_accelerator (GtkWidget *widget, const gchar *signal_name, GtkAccelGroup *group, guint accel_key, GdkModifierType mods, GtkAccelFlags flags); To add an accelerator to a widget, you can use gtk_widget_add_accelerator(), which will emit the signal specified by signal_name on the widget when the user presses the key combination. You need to specify your accelerator group to the function, which must be associated with the window and the menu as previously stated. An accelerator key and one or more modifier keys form the complete key combination. A list of available accelerator keys is available in <gdk/gdkkeysyms.h>. This header file is not included in <gtk/gtk.h>, so it must explicitly be included. Modifiers are specified by the GdkModifierType enumeration. The most often used modifiers are GDK_SHIFT_LOCK, GDK_ CONTROL_MASK, and GDK_MOD1_MASK, which correspond to the Shift, Ctrl, and Alt keys respectively.
Painting UPC A In None
Using Barcode encoder for Font Control to generate, create UPC A image in Font applications.
www.OnBarcode.com
Make Code 128 Code Set C In None
Using Barcode creator for Font Control to generate, create Code 128C image in Font applications.
www.OnBarcode.com
Tip When dealing with key codes, you need to be careful because you many need to supply multiple
Making EAN 13 In None
Using Barcode creator for Font Control to generate, create EAN-13 Supplement 5 image in Font applications.
www.OnBarcode.com
Creating Barcode In None
Using Barcode encoder for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
keys for the same action in some cases. For example, if you want to catch the number 1 key, you will need to watch for GDK_1 and GDK_KP_1 they correspond to the 1 key at the top of the keyboard and the 1 key on the numeric keypad.
UCC-128 Generator In None
Using Barcode printer for Font Control to generate, create UCC - 12 image in Font applications.
www.OnBarcode.com
Making Postnet 3 Of 5 In None
Using Barcode encoder for Font Control to generate, create Postnet 3 of 5 image in Font applications.
www.OnBarcode.com
The last parameter of gtk_widget_add_accelerator() is an accelerator flag. There are three flags defined by the GtkAccelFlags enumeration. The accelerator will be visible in a label if GTK_ACCEL_VISIBLE is set. GTK_ACCEL_LOCKED will prevent the user from modifying the accelerator. GTK_ACCEL_MASK will set both flags for the widget accelerator.
DataMatrix Maker In Visual Studio .NET
Using Barcode drawer for VS .NET Control to generate, create DataMatrix image in .NET framework applications.
www.OnBarcode.com
Data Matrix ECC200 Recognizer In C#
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
Status Bar Hints
Barcode Encoder In None
Using Barcode creator for Microsoft Excel Control to generate, create Barcode image in Office Excel applications.
www.OnBarcode.com
EAN128 Creation In Java
Using Barcode drawer for Java Control to generate, create EAN128 image in Java applications.
www.OnBarcode.com
Usually placed along the bottom of the main window, the GtkStatusbar widget can be used to give the user further information about what is going on in the application. A status bar can also be very useful with menus, because you can provide more information to the user about
Code 128B Recognizer In VB.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
www.OnBarcode.com
UPC Symbol Printer In None
Using Barcode encoder for Office Excel Control to generate, create GTIN - 12 image in Microsoft Excel applications.
www.OnBarcode.com
CHAPTER 9 MENUS AND TOOLBARS
QR Code Recognizer In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
www.OnBarcode.com
Code 128 Generation In Java
Using Barcode generator for BIRT Control to generate, create Code128 image in BIRT reports applications.
www.OnBarcode.com
the functionality of the menu item that the mouse cursor is hovering over. A screenshot of a status bar can be viewed in Figure 9-2.
Barcode Scanner In VS .NET
Using Barcode decoder for VS .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Creating Quick Response Code In Visual Basic .NET
Using Barcode generator for VS .NET Control to generate, create Quick Response Code image in VS .NET applications.
www.OnBarcode.com
Figure 9-2. A pop-up menu with status bar hints
Generating QR Code In .NET
Using Barcode encoder for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
www.OnBarcode.com
Barcode Creation In Objective-C
Using Barcode printer for iPhone Control to generate, create Barcode image in iPhone applications.
www.OnBarcode.com
The Status Bar Widget
While the status bar can only display one message at a time, the widget actually stores a stack of messages. The currently displayed message is on the top of the stack. When you pop a message from the stack, the previous message is displayed. If there are no more strings left on the stack after you pop a message from the top, no message is displayed on the status bar. New status bar widgets are created with gtk_statusbar_new(). This will create a new GtkStatusbar widget with an empty message stack. Before you are able to add or remove a message from the new status bar s stack, you must retrieve a context identifier with gtk_status_bar_get_context_id(): guint gtk_statusbar_get_context_id (GtkStatusBar *statusbar, const gchar *description); The context identifier is a unique unsigned integer that is associated with a context description string. This identifier will be used for all messages of a specific type, which allows you to categorize messages on the stack. For example, if your status bar will hold hyperlinks and IP addresses, you could create two context identifiers from the strings URL and IP . When you push or pop messages to and from the stack, you have to specify a context identifier. This allows separate parts of your application to push and pop messages to and from the status bar message stack without affecting each other.
Tip It is important to use different context identifiers for different categories of messages. If one part of
your application is trying to give a message to the user while the other is trying to remove its own message, you do not want the wrong message to be popped from the stack!
Copyright © OnBarcode.com . All rights reserved.