Si se pulsa «Intro» se obtiene una línea nueva.
Si se pulsa «Intro» más veces entonces hay líneas en la ventana de tamaño predeterminado, y después aparece una barra de desplazamiento vertical.
Si se escribe una frase larga, el texto se ajustará a los saltos de línea entre palabras.
Si es escribe una palabra laaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaarga (eso es largo), aparecerá una barra de desplazamiento horizontal.
Esto es un ejemplo de Gtk.TextView
#include <gtk/gtk.h>
static void
activate (GtkApplication *app,
gpointer user_data)
{
/* Declare variables */
GtkWidget *window;
GtkWidget *text_view;
GtkWidget *scrolled_window;
GtkTextBuffer *buffer;
/* Create a window with a title, and a default size */
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "TextView Example");
gtk_window_set_default_size (GTK_WINDOW (window), 220, 200);
/* The text buffer represents the text being edited */
buffer = gtk_text_buffer_new (NULL);
/* Text view is a widget in which can display the text buffer.
* The line wrapping is set to break lines in between words.
*/
text_view = gtk_text_view_new_with_buffer (buffer);
gtk_text_view_set_wrap_mode (GTK_TEXT_VIEW (text_view), GTK_WRAP_WORD);
/* Create the scrolled window. Usually NULL is passed for both parameters so
* that it creates the horizontal/vertical adjustments automatically. Setting
* the scrollbar policy to automatic allows the scrollbars to only show up
* when needed.
*/
scrolled_window = gtk_scrolled_window_new (NULL, NULL);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
/* The function directly below is used to add children to the scrolled window
* with scrolling capabilities (e.g text_view), otherwise,
* gtk_scrolled_window_add_with_viewport() would have been used
*/
gtk_container_add (GTK_CONTAINER (scrolled_window),
text_view);
gtk_container_set_border_width (GTK_CONTAINER (scrolled_window), 5);
gtk_container_add (GTK_CONTAINER (window), scrolled_window);
gtk_widget_show_all (window);
}
int
main (int argc, char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
g_object_unref (app);
return status;
}
En este ejemplo se usa lo siguiente:
GtkApplication
GtkWindow
GtkTextBuffer
GtkTextView
GtkScrolledWindow
GtkContainer