c - gtk+ vte 回滚不起作用

Question

gtk+ 版本 2.24.8

vte 版本 0.28.2

我刚刚开始创建一个终端应用程序，但是，我在网上找到的示例 (5) 都没有有效的回滚功能。 vte 中的回滚是否有问题，或者是我没有看到的问题？这是一个例子:

#include <gtk/gtk.h>
#include <vte/vte.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <gdk/gdkkeysyms.h> // includes GDK_q


/* gcc -Wall -g term.c -o term `pkg-config --cflags --libs gtk+-2.0 vte` */

long size;
char *buf;
char *ptr;

gboolean key_press_win_main (GtkWidget *widget, GdkEventKey *event, gpointer user_data);
void quit_activated();
static gboolean delete_event(GtkWidget *,GdkEvent *);

int main( int argc, char *argv[] )
{

  size = pathconf(".", _PC_PATH_MAX);
  if ((buf = (char *)malloc((size_t)size)) != NULL) ptr = getcwd(buf, (size_t)size);

  GtkWidget *window_main;
  GtkWidget *vbox;
  GtkWidget *vte;
  GtkWidget *notebook;
  GtkWidget *scrolled_window;
  GtkWidget *label;

  gtk_init (&argc, &argv);

  window_main = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window_main), "Caraterm v0.0.1");

  vbox = gtk_vbox_new(FALSE,0);
  gtk_container_add (GTK_CONTAINER (window_main), vbox);


  notebook = gtk_notebook_new ();
  gtk_notebook_set_tab_pos (GTK_NOTEBOOK (notebook), GTK_POS_BOTTOM);
  gtk_box_pack_start (GTK_BOX (vbox), notebook, TRUE, TRUE, 0);

  scrolled_window = gtk_scrolled_window_new (NULL, NULL);
  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
  label = gtk_label_new ("term1");
  gtk_notebook_append_page (GTK_NOTEBOOK (notebook), scrolled_window, label);

  vte = vte_terminal_new();
  vte_terminal_set_background_transparent(VTE_TERMINAL(vte), FALSE);
  vte_terminal_set_size(VTE_TERMINAL(vte), 80, 45);
  vte_terminal_set_scrollback_lines(VTE_TERMINAL (vte), -1); /* infinite scrollback */
  vte_terminal_fork_command(VTE_TERMINAL(vte), NULL, NULL, NULL, ptr, TRUE, TRUE,TRUE);
  vte_terminal_set_scroll_on_keystroke(VTE_TERMINAL (vte), TRUE);
  gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW (scrolled_window), vte);

  printf("%s\n", vte_terminal_get_emulation(VTE_TERMINAL (vte)));

  g_signal_connect(G_OBJECT(window_main),"destroy",G_CALLBACK(quit_activated),NULL);
  g_signal_connect(G_OBJECT(window_main),"delete_event",G_CALLBACK(delete_event),NULL);
  g_signal_connect (G_OBJECT (window_main), "key_press_event", G_CALLBACK (key_press_win_main), NULL);


  gtk_widget_show (label);
  gtk_widget_show (notebook);
  gtk_widget_show (scrolled_window);
  gtk_widget_show (vte);
  gtk_widget_show (vbox);
  gtk_widget_show (window_main);

  gtk_main ();

  return 0;
}

gboolean key_press_win_main (GtkWidget *widget, GdkEventKey *event, gpointer user_data)

{

  switch (event->keyval)
  {
     case GDK_q:
            if (event -> state & GDK_CONTROL_MASK)
            {
        printf("entered q\n");
        quit_activated();
                    }

      break;

    default:
      return FALSE; 
  }

  return FALSE; 
}

void quit_activated()
{   
  gtk_main_quit();

}

static gboolean delete_event(GtkWidget *window_main,GdkEvent *event)
{  
  return FALSE;
}

此示例将滚动，但仅适应通过 vte_terminal_set_size(VTE_TERMINAL(vte), 80, 45); 设置的 vte 的原始大小； 如果只需按回车键即可将更多行添加到终端或者从程序生成输出时回滚缓冲区不会扩展。尽管指定了无限回滚，但它仍固定为 45 行 vte_terminal_set_scrollback_lines(VTE_TERMINAL (vte), -1);/* 无限回滚 */

我错过了什么？谢谢。

Answer 1

为了让回滚正常工作，需要更改的行是:

scrolled_window = gtk_scrolled_window_new (NULL, NULL);

至:

scrolled_window = gtk_scrolled_window_new (NULL, terminal->adjustment);

其中终端定义为:

VteTerminal *terminal;

vte = vte_terminal_new();
terminal = VTE_TERMINAL (vte);