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我目前正在编写一个 GTK 应用程序，它由一个带有 aGtkListView和一个按钮的窗口组成。当用户按下按钮时，将出现一些允许插入新数据以附加到列表的表单。

我不想为表单打开一个新窗口，而是希望它暂时替换GtkListView. 我对 GTK 很陌生，所以我想知道是否有一种惯用的方法来做到这一点。

我目前的猜测是我必须添加一个带有两个隐藏选项卡的笔记本，一个用于列表，一个用于表单。每当按下按钮时，我都会发出focus-tab信号以切换到表单选项卡。

有没有更好的方法来临时替换 a GtkListView？

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2 回答 2

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您可以尝试在按钮的回调中使用gtk_container_add&gtk_container_remove来实现此目的。将您的第一个视图添加到容器中。在用户单击按钮时，删除第一个视图并添加下一个视图。反之亦然。确保在添加到容器之前添加对小部件的引用，因为如果从容器中删除小部件并且没有对小部件的引用，则小部件将被销毁。以下是 C 中的示例供您参考：

#include <gtk/gtk.h>

static GtkWidget *view0;
static GtkWidget *view1;
static GtkWidget *frame;
static int current_view_id;

static GtkWidget *
create_view0 (void)
{
  GtkWidget *scrolled_window = gtk_scrolled_window_new (NULL, NULL);
  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
                  GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
  GtkWidget *view0_content = gtk_label_new ("Here is first view");
  gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW
                     (scrolled_window), view0_content);
  gtk_widget_show_all (scrolled_window);
  return scrolled_window;
}

static GtkWidget *
create_view1 (void)
{
  GtkWidget *scrolled_window = gtk_scrolled_window_new (NULL, NULL);
  GtkWidget *view1_content = gtk_label_new ("Here is next view");
  gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolled_window),
                  GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
  gtk_scrolled_window_add_with_viewport (GTK_SCROLLED_WINDOW
                     (scrolled_window), view1_content);
  gtk_widget_show_all (scrolled_window);
  return scrolled_window;
}

static gboolean
change_view (GtkWidget * button, gpointer data)
{
  (void) data;

  if (current_view_id == 0)
    {
      gtk_button_set_label (GTK_BUTTON (button), "Prev");
      gtk_container_remove (GTK_CONTAINER (frame), view0);
      /* Need to add reference as container will own widget ref */
      /* If gtk_container_remove is called with widget's last ref, widget is destroyed */
      g_object_ref (view1);
      gtk_container_add (GTK_CONTAINER (frame), view1);
      current_view_id = 1;
    }
  else
    {
      gtk_button_set_label (GTK_BUTTON (button), "Next");
      gtk_container_remove (GTK_CONTAINER (frame), view1);
      /* Need to add reference as container will own widget ref */
      /* If gtk_container_remove is called with widget's last ref, widget is destroyed */
      g_object_ref (view0);
      gtk_container_add (GTK_CONTAINER (frame), view0);
      current_view_id = 0;
    }

  return FALSE;
}

int
main (void)
{
  GtkWidget *window;
  GtkWidget *vbox;
  GtkWidget *label;
  GtkWidget *button;

  gtk_init (NULL, NULL);

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  g_signal_connect (window, "destroy", G_CALLBACK (gtk_main_quit), NULL);

  vbox = gtk_vbox_new (FALSE, 5);
  gtk_container_add (GTK_CONTAINER (window), vbox);

  frame = gtk_frame_new (" Sample for view change ");
  view0 = create_view0 ();
  view1 = create_view1 ();

  /* Need to add reference as container will own widget ref */
  /* If gtk_container_remove is called with widget's last ref, widget is destroyed */
  g_object_ref (view0);
  gtk_container_add (GTK_CONTAINER (frame), view0);

  label = gtk_label_new ("View change sample");
  button = gtk_button_new_with_label ("Next");
  g_signal_connect (button, "clicked", G_CALLBACK (change_view), NULL);
  gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
  gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);
  gtk_widget_show_all (window);

  gtk_main ();
  return 0;
}

希望这可以帮助！

于 2011-12-17T16:08:03.783 回答
2

您不需要笔记本来创建临时小部件，您只需使用一个简单的框我使用的是以下内容：

  # displaying the list view
  container = gtk.VBox()
  container.add(tree_view)

  # removing the treeview and adding a form
  container.remove(tree_view)
  container.add(form)
  form.show()
于 2011-12-18T13:36:10.867 回答