关于C#：使用GtkBox中package的GtkTextView自动滚动GtkScrolledWindow

Auto scrolling GtkScrolledWindow with GtkTextView wrapped in GtkBox

当我在GtkScrolledWindow中具有GtkTextView时，当用户在小部件底部添加新行时，它将自动滚动。当我将GtkTextView放在GtkBox中，然后在GtkScrolledWindow中时，我无法使用。我需要在GtkTextView和滚动条之间放置一个框，如果不把整个东西放在另一个框中，我将无法做到这一点。在GtkScrolledWindow中使用GtkBox时，有什么方法可以保留自动滚动行为？

有说明我问题的代码：

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#include <gtk/gtk.h>

int main(int argc, char *argv[]) {
GtkWidget *window;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window),
gdk_screen_width()*0.5, gdk_screen_height()*0.5);

GtkWidget *main = gtk_box_new(0, 0);
gtk_container_add(GTK_CONTAINER(window), main);
/*/////////////////////////////////////////////////*/

/* IMPORTANT PART */

/* FIRST CASE (this one works correctly) */
GtkWidget *scrolled_window_first = gtk_scrolled_window_new(NULL, NULL);
GtkWidget *text_view_first = gtk_text_view_new();

gtk_container_add(GTK_CONTAINER(scrolled_window_first), text_view_first);
gtk_box_pack_start(GTK_BOX(main), scrolled_window_first, 1, 1, 0);

/* SECOND CASE (there is no auto scroll which I need) */
GtkWidget *scrolled_window_second = gtk_scrolled_window_new(NULL, NULL);
GtkWidget *text_view_second = gtk_text_view_new();
GtkWidget *box_from_second_example = gtk_box_new(0, 0);
GtkWidget *example_box_before_scroller = gtk_box_new(0,0);

GtkWidget *example_label = gtk_label_new("I need this box badly!");

gtk_box_pack_start(GTK_BOX(box_from_second_example), text_view_second, 1, 1, 0);
gtk_container_add(GTK_CONTAINER(scrolled_window_second), box_from_second_example);
gtk_container_add(GTK_CONTAINER(box_from_second_example), example_box_before_scroller);
gtk_box_pack_start(GTK_BOX(main), scrolled_window_second, 1, 1, 0);

/* END IMPORTANT PART */

/*/////////////////////////////////////////////////*/
gtk_container_add(GTK_CONTAINER(example_box_before_scroller), example_label);
g_signal_connect(GTK_WINDOW(window),"destroy", G_CALLBACK(gtk_main_quit), NULL);
gtk_widget_show_all(window);
gtk_main ();

return 0;
}

问题是GtkTextView实现了GtkScrollable，但GtkBox没有实现。这不是一个小问题：如果要使用GtkBox方式，则应将其放入GtkViewport并添加可滚动性内容...相当一些代码，需要深入了解整个内容的滚动方式。 >

无论如何，如果您足够懒惰，您可能还会注意到GtkTextView是GtkContainer。换句话说，您可以在GtkTextView周围添加小部件，而无需混淆GtkBox。并非完全符合您的要求，但可能足以满足您的目的：

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#include <gtk/gtk.h>

gint main(gint argc, gchar **argv)
{
GtkWidget *window, *scrolled_window, *text_view, *label;

gtk_init(&argc, &argv);

text_view = gtk_text_view_new();
gtk_text_buffer_set_text(gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_view)),
"1\
\
\
2\
\
\
3\
\
\
4\
\
\
5\
\
\
6\
\
\
7\
\
\
8", -1);
/* Use this to set the size you want to reserve on the right */
gtk_text_view_set_border_window_size(GTK_TEXT_VIEW(text_view),
GTK_TEXT_WINDOW_RIGHT,
130);
/* Add whatever you want instead of a GtkLabel */
gtk_text_view_add_child_in_window(GTK_TEXT_VIEW(text_view),
gtk_label_new("You badly need this"),
GTK_TEXT_WINDOW_RIGHT,
0, 0);

scrolled_window = gtk_scrolled_window_new(NULL, NULL);
gtk_container_add(GTK_CONTAINER(scrolled_window), text_view);

window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window), 320, 240);
gtk_container_add(GTK_CONTAINER(window), scrolled_window);
gtk_widget_show_all(window);

gtk_main ();

return 0;
}