Question

我有一个按钮，当点击时复制并将GtkEntry小部件中的文本附加到GtkTextView小部件中。（此代码是 GTK +开发基础的“文本视图小部件”一章中的示例的修改版本。）

我希望在复制和附加的文本之前插入一个换行符，这样每行文本都将在GtkTextView小部件中独占一行。我该怎么做？我是GTK +的新手。

以下是代码示例：

#include <gtk/gtk.h>

typedef struct
{
     GtkWidget *entry, *textview;
} Widgets;

static void insert_text (GtkButton*, Widgets*);

int main (int argc,
          char *argv[])
{
     GtkWidget *window, *scrolled_win, *hbox, *vbox, *insert;
     Widgets *w = g_slice_new (Widgets);

     gtk_init (&argc, &argv);

     window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
     gtk_window_set_title (GTK_WINDOW (window), "Text Iterators");
     gtk_container_set_border_width (GTK_CONTAINER (window), 10);
     gtk_widget_set_size_request (window, -1, 200);

     w->textview = gtk_text_view_new ();
     w->entry = gtk_entry_new ();
     insert = gtk_button_new_with_label ("Insert Text");

     g_signal_connect (G_OBJECT (insert), "clicked",
               G_CALLBACK (insert_text),
               (gpointer) w);

     scrolled_win = gtk_scrolled_window_new (NULL, NULL);
     gtk_container_add (GTK_CONTAINER (scrolled_win), w->textview);

     hbox = gtk_hbox_new (FALSE, 5);
     gtk_box_pack_start_defaults (GTK_BOX (hbox), w->entry);
     gtk_box_pack_start_defaults (GTK_BOX (hbox), insert);

     vbox = gtk_vbox_new (FALSE, 5);
     gtk_box_pack_start (GTK_BOX (vbox), scrolled_win, TRUE, TRUE, 0);
     gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, TRUE, 0);

     gtk_container_add (GTK_CONTAINER (window), vbox);
     gtk_widget_show_all (window);

     gtk_main();
     return 0;
}

/* Insert the text from the GtkEntry into the GtkTextView. */
static void
insert_text (GtkButton *button,
             Widgets *w)
{
     GtkTextBuffer *buffer;
     GtkTextMark *mark;
     GtkTextIter iter;
     const gchar *text;

     buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (w->textview));
     text = gtk_entry_get_text (GTK_ENTRY (w->entry));

     mark = gtk_text_buffer_get_insert (buffer);
     gtk_text_buffer_get_iter_at_mark (buffer, &iter, mark);
     gtk_text_buffer_insert (buffer, &iter, text, -1);
}

您可以使用以下命令编译此代码（假设文件名为file.c）：

gcc file.c -o file `pkg-config --cflags --libs gtk+-2.0`

谢谢大家！

Answer 1

也许您可以像插入其他字符一样插入换行符：

...
mark = gtk_text_buffer_get_insert (buffer);
gtk_text_buffer_get_iter_at_mark (buffer, &iter, mark);

/* Insert newline (only if there's already text in the buffer). */
if (gtk_text_buffer_get_char_count(buffer))
    gtk_text_buffer_insert (buffer, &iter, "\n", 1);

gtk_text_buffer_insert (buffer, &iter, text, -1);
...

"\n"是一个包含C中换行符的字符串，它在GTK中运行得很好（除非出于某些奇怪的原因在Windows中不存在）。

无益的模糊：1可以很容易地-1在这里;它只是告诉GTK它只需要读取1个字符，这可能会快一点。当然，这行代码几乎不应该成为瓶颈： - ）

将换行符插入GtkTextView小部件（GTK +编程）

1 个答案: