gtk 处理列表存储树视图中的事件

Question

我的代码如下

   #include <gtk/gtk.h>
    #include <glib.h>
    #include <stdlib.h>
    GtkWidget *scrolledwindow;

    struct param
{
    GtkWidget*parent;
    GtkWidget*newChild;
};
GtkWidget * init_tree();
GtkWidget * init_tree2();
static void destroy(GtkWidget *widget, gpointer data)
{
  gtk_main_quit();
}

static void replace_tab(GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
{
      struct param* parameters = (struct param*)user_data;
      gtk_container_remove(GTK_CONTAINER(parameters->parent), (GtkWidget*)tree_view);
      gtk_container_add(GTK_CONTAINER(parameters->parent), init_tree2()/*parameters->newChild*/);
}


    GtkWidget * init_tree()
    {

        GtkListStore *liststore = gtk_list_store_new(1, G_TYPE_STRING);
        GtkTreeIter treeiter;

        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Mandriva", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Aptosid", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "OpenSuSE", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Linux Mint", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Arch Linux", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Mandriva", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Aptosid", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "OpenSuSE", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Linux Mint", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Arch Linux", -1);
     GtkWidget *treeview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(liststore));

        GtkCellRenderer *cellrenderertext = gtk_cell_renderer_text_new();

        GtkTreeViewColumn *treeviewcolumn = gtk_tree_view_column_new_with_attributes("Distributions",
                                                                                     cellrenderertext,
                                                                                     "text", 0,
                                                                                     NULL);
        gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), treeviewcolumn);

        return treeview;
    }

    GtkWidget * init_tree2()
    {

        GtkListStore *liststore = gtk_list_store_new(1, G_TYPE_STRING);
        GtkTreeIter treeiter;

        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "a", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "b", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "c", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "d", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "e", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "f", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Aptosid", -1);
     gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "OpenSuSE", -1);
        gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Linux Mint", -1);

    gtk_list_store_append(liststore, &treeiter);
        gtk_list_store_set(liststore, &treeiter, 0, "Arch Linux", -1);

        GtkWidget *treeview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(liststore));

        GtkCellRenderer *cellrenderertext = gtk_cell_renderer_text_new();

        GtkTreeViewColumn *treeviewcolumn = gtk_tree_view_column_new_with_attributes("Distributions",
                                                                                     cellrenderertext,
                                                                                     "text", 0,
                                                                                     NULL);
        gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), treeviewcolumn);

        return treeview;
    }

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

      GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
      gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);
      g_signal_connect(window, "destroy", G_CALLBACK(destroy), NULL);

      GtkWidget *notebook = gtk_notebook_new();
      gtk_container_add(GTK_CONTAINER(window), notebook);


      int count;
      gchar *text;

      for (count = 1; count <= 5; count++)
        {
          GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 5);
          text = g_strdup_printf("Page %d", count);
    GtkWidget *label = gtk_label_new(text);
          GtkWidget *scrolledwindow = gtk_scrolled_window_new(NULL, NULL);

          gtk_widget_set_size_request(scrolledwindow, -1, 200);

          gtk_container_add(GTK_CONTAINER(vbox), scrolledwindow);
          GtkWidget *textview = gtk_text_view_new();
          /* gtk_container_add(GTK_CONTAINER(scrolledwindow), textview); */
          GtkWidget* treeview = init_tree();
          GtkWidget* treeview2 = init_tree2();
struct param* parameters = malloc(sizeof(struct param));
      parameters->parent = scrolledwindow;
      parameters->newChild= treeview2;
          g_signal_connect(treeview, "row-activated", G_CALLBACK(replace_tab),(gpointer)parameters);
          gtk_container_add(GTK_CONTAINER(scrolledwindow), treeview);

          gtk_notebook_append_page(GTK_NOTEBOOK(notebook), vbox, label);
        }

      gtk_widget_show_all(window);

      gtk_main();

      return 0;
    }

我有 2 个列表存储实例 treview1 和 treeview2。显示 1st- 树视图 1。双击任何列表存储项目时，它会生成 "row-activated " 信号。此信号与函数 "replace_tab" 和 G_CALLBACK 相关联。 func "replace_tab " 有 4 个参数——parent Widget，Widget to remove from parent，widget to add to parent 和 gpointer data。如何将参数传递给此函数。或者有没有其他方法可以解决。

Answer 1

代码不好，但这不是问题，因此，要解决双击时不显示第二个树视图而不是第一个树视图的具体问题：

如@Gerhardh 所说，您需要将参数作为最后一个参数传递给回调，否则应用程序将在双击一行时出现段错误：g_signal_connect(treeview, "row-activated", G_CALLBACK(replace_tab), parameters);
您必须在 replace_tab 函数中显示新的树视图：gtk_widget_show_all (GTK_WIDGET(parameters->parent));

您的代码与上述建议：

#include <gtk/gtk.h>
#include <glib.h>
#include <stdlib.h>
GtkWidget * init_tree();
GtkWidget * init_tree2();
GtkWidget *scrolledwindow;
struct param
{
    GtkWidget*parent;
    GtkWidget*newChild;
};

static void destroy(GtkWidget *widget, gpointer data)
{
   gtk_main_quit();
}

static void replace_tab(GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
{
   struct param* parameters = (struct param*)user_data;
   gtk_container_remove(GTK_CONTAINER(parameters->parent), (GtkWidget*)tree_view);
   gtk_container_add(GTK_CONTAINER(parameters->parent), init_tree2()/*parameters->newChild*/);
   gtk_widget_show_all (GTK_WIDGET(parameters->parent));
}


GtkWidget * init_tree()
{
  GtkListStore *liststore = gtk_list_store_new(1, G_TYPE_STRING);
  GtkTreeIter treeiter;

  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "Mandriva", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "Aptosid", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "OpenSuSE", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "Linux Mint", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "Arch Linux", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "Mandriva", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "Aptosid", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "OpenSuSE", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "Linux Mint", -1);
  gtk_list_store_append(liststore, &treeiter);
  gtk_list_store_set(liststore, &treeiter, 0, "Arch Linux", -1);

  GtkWidget *treeview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(liststore));

  GtkCellRenderer *cellrenderertext = gtk_cell_renderer_text_new();

  GtkTreeViewColumn *treeviewcolumn = gtk_tree_view_column_new_with_attributes("Distributions",
                                                                               cellrenderertext,
                                                                               "text", 0,
                                                                               NULL);
  gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), treeviewcolumn);

  return treeview;
}

GtkWidget * init_tree2()
{

   GtkListStore *liststore = gtk_list_store_new(1, G_TYPE_STRING);
   GtkTreeIter treeiter;

   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "a", -1);
   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "b", -1);
   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "c", -1);
   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "d", -1);
   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "e", -1);
   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "f", -1);
   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "Aptosid", -1);
   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "OpenSuSE", -1);
   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "Linux Mint", -1);

   gtk_list_store_append(liststore, &treeiter);
   gtk_list_store_set(liststore, &treeiter, 0, "Arch Linux", -1);

   GtkWidget *treeview = gtk_tree_view_new_with_model(GTK_TREE_MODEL(liststore));

   GtkCellRenderer *cellrenderertext = gtk_cell_renderer_text_new();

   GtkTreeViewColumn *treeviewcolumn = gtk_tree_view_column_new_with_attributes("Distributions",
                                                                               cellrenderertext,
                                                                               "text", 0,
                                                                               NULL);
   gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), treeviewcolumn);

   return treeview;
}

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

   GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
   gtk_window_set_default_size(GTK_WINDOW(window), 200, 200);
   g_signal_connect(window, "destroy", G_CALLBACK(destroy), NULL);

   GtkWidget *notebook = gtk_notebook_new();
   gtk_container_add(GTK_CONTAINER(window), notebook);


   int count;
   gchar *text;

   for (count = 1; count <= 5; count++)
   {
      GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 5);
      text = g_strdup_printf("Page %d", count);
      GtkWidget *label = gtk_label_new(text);
      GtkWidget *scrolledwindow = gtk_scrolled_window_new(NULL, NULL);

      gtk_widget_set_size_request(scrolledwindow, -1, 200);

      gtk_container_add(GTK_CONTAINER(vbox), scrolledwindow);
      GtkWidget* treeview = init_tree();
      GtkWidget* treeview2 = init_tree2();
      struct param* parameters = malloc(sizeof(struct param));
      parameters->parent = scrolledwindow;
      parameters->newChild= treeview2;
      g_signal_connect(treeview, "row-activated", G_CALLBACK(replace_tab), parameters);
      gtk_container_add(GTK_CONTAINER(scrolledwindow), treeview);

      gtk_notebook_append_page(GTK_NOTEBOOK(notebook), vbox, label);
   }

   gtk_widget_show_all(window);

   gtk_main();

   return 0;
}

gtk 处理列表存储树视图中的事件

gtk-handle events from a list store treeview

c

linux

gtk