GTK+ Gnome Application Development by Havoc Pennington
By Havoc Pennington
This name is for the reader who's conversant with the c language and UNIX/Linux improvement. It presents distinct and solution-oriented details designed to fulfill the desires of programmers and alertness builders utilizing the GTK+/Gnome libraries. insurance enhances latest GTK+/Gnome documentation, going into extra intensity on pivotal matters akin to uncovering the GTK+ item approach, operating with the development loop, dealing with the Gdk substrate, writing customized widgets, and mstering GnomeCanvas.
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Non-homogeneous, with expand = FALSE Second, you can spread widgets throughout the box, letting them keep their natural size as in Figure 3-7; this means setting the expand parameter to TRUE: gtk_box_pack_start(GTK_BOX(box), child, TRUE, FALSE, 0); Figure 3-7. Non-homogeneous, with expand = TRUE and fill = FALSE Finally, you can fill the box with widgets (letting larger children have more space) by setting the fill parameter to TRUE as well: gtk_box_pack_start(GTK_BOX(box), child, TRUE, TRUE, 0); This configuration is shown in Figure 3-8 Figure 3-8.
A generic event loop abstraction, used to implement GTK+’s event loop. • A portable threads abstraction. If you need some generally-useful routine that’s not in glib already, consider writing it in glib style and contributing it to the library! You get free assistance with design, debugging, and maintenance, and other programmers benefit from the facility you’ve written. By the time you read this, it’s also possible that the feature you want is already in the latest version of glib. 49 Chapter 3.
Changing linked list contents For accessing list elements, the functions in Figure 2-14 are provided. None of these change the list’s structure. g_slist_foreach() applies a GFunc to each element of the list. A GFunc is defined as follows: typedef void (*GFunc)(gpointer data, gpointer user_data); Used in g_slist_foreach(), your GFunc will be called on each list->data in list, passing the user_data you provided to g_slist_foreach(). g_slist_foreach() is comparable to Scheme’s "map" function. 39 Chapter 2.