小贝子编程

C -GTK背包按钮未从网格中删除，ListStore TreeView Row并未显示完整



我有2个问题：

  1. 在我单击列表项目的页面中，另一个带有按钮的列表将添加到网格中，但是当我按下按钮时，第一个页面返回，但是从网格中删除了返回按钮。

  2. 列表存储项目未完整显示，它已被截断。

我如何显示完整列表？

#include <gtk/gtk.h>
#include <glib.h>
#include <stdlib.h>
GtkWidget *scrolledwindow;
struct param
{
    GtkWidget* grid;
    GtkWidget* scrolledwindow;
    GtkWidget*newChild;
    GtkWidget*oldChild;
};
GtkWidget * init_tree();
GtkWidget * init_tree2();
static void destroy(GtkWidget *widget, gpointer data)
{
  gtk_main_quit();
}
static void Back (GtkButton *button, gpointer   user_data)
{
      struct param* parameters = (struct param*)user_data;
      gtk_container_remove(GTK_CONTAINER(parameters->scrolledwindow), parameters->oldChild);
      gtk_container_add(GTK_CONTAINER(parameters->scrolledwindow), parameters->newChild);
      gtk_grid_remove_row (GTK_GRID (parameters->grid),20);
      gtk_widget_show_all (GTK_WIDGET(parameters->scrolledwindow));
      gtk_widget_show_all (GTK_WIDGET(parameters->grid));

}

static void replace_tab(GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
{
      struct param* parameters = (struct param*)user_data;
      //gtk_grid_insert_row ( GTK_GRID(grid),2);
      gtk_container_remove(GTK_CONTAINER(parameters->scrolledwindow), GTK_WIDGET(tree_view));
      gtk_container_add(GTK_CONTAINER(parameters->scrolledwindow), parameters->newChild);
      GtkWidget *button = gtk_button_new_with_label ("Back");
      gtk_grid_attach (GTK_GRID (parameters->grid), button, 0, 20, 2, 2);
      parameters->oldChild = parameters->newChild;
      parameters->newChild= init_tree();
      g_signal_connect (button, "clicked", G_CALLBACK (Back), parameters);
      gtk_widget_show_all (GTK_WIDGET(parameters->scrolledwindow));
      gtk_widget_show_all (GTK_WIDGET(parameters->grid));
}
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* grid = gtk_grid_new ();
      GtkWidget *scrolledwindow = gtk_scrolled_window_new(NULL, NULL);
      gtk_widget_set_size_request(scrolledwindow, -1, 200);
      gtk_container_add(GTK_CONTAINER(vbox), grid/*scrolledwindow*/);
      //gtk_container_add(GTK_CONTAINER(grid), scrolledwindow);
      gtk_grid_attach (GTK_GRID (grid), scrolledwindow, 0, 0, 200, 10);
      //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->scrolledwindow = scrolledwindow;
      parameters->grid = grid;
      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;
}

首先，代码不好，但这不是问题，因此，在显示第二个时，解决了实现返回按钮的特定问题treeview在同一笔记本页面中您可以重复使用包含treeview的vbox并在其下方添加一个按钮。您必须将no-show-all属性设置为TRUE，并自己设置显示/隐藏状态。基本上，您只想在显示第二个treeview时显示它。

我已经使用了 GtkBox pack函数，并且在回调中，显示并隐藏了后背按钮。

尝试使用这些次要调整的代码：

#include <gtk/gtk.h>
#include <glib.h>
#include <stdlib.h>
GtkWidget *scrolledwindow;
struct param
{
    GtkWidget* backbutton;
    GtkWidget* scrolledwindow;
    GtkWidget*newChild;
    GtkWidget*oldChild;
};
GtkWidget * init_tree();
GtkWidget * init_tree2();
static void destroy(GtkWidget *widget, gpointer data)
{
  gtk_main_quit();
}
static void Back (GtkButton *button, gpointer   user_data)
{
      struct param* parameters = (struct param*)user_data;
      gtk_widget_hide(GTK_WIDGET(parameters->scrolledwindow));
      gtk_container_remove(GTK_CONTAINER(parameters->scrolledwindow), GTK_WIDGET(parameters->newChild));
      gtk_container_add(GTK_CONTAINER(parameters->scrolledwindow), parameters->oldChild);
      gtk_widget_hide (GTK_WIDGET(parameters->backbutton));
      gtk_widget_show_all (GTK_WIDGET(parameters->scrolledwindow));
}

static void replace_tab(GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
{
      struct param* parameters = (struct param*)user_data;
      gtk_widget_hide(GTK_WIDGET(parameters->scrolledwindow));
      gtk_container_remove(GTK_CONTAINER(parameters->scrolledwindow), GTK_WIDGET(tree_view));
      gtk_container_add(GTK_CONTAINER(parameters->scrolledwindow), parameters->newChild);
      gtk_widget_show (GTK_WIDGET(parameters->backbutton));
      gtk_widget_show_all (GTK_WIDGET(parameters->scrolledwindow));
}
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++)
    {
      text = g_strdup_printf("Page %d", count);
      GtkWidget *label = gtk_label_new(text);
      GtkWidget *vbox = gtk_box_new(GTK_ORIENTATION_VERTICAL, 5);
      GtkWidget *scrolledwindow = gtk_scrolled_window_new(NULL, NULL);
      GtkWidget *backbutton = gtk_button_new_with_label ("Back");
      gtk_widget_set_no_show_all (backbutton, TRUE);
      gtk_box_pack_start (GTK_BOX(vbox), scrolledwindow, TRUE, TRUE, 0);
      gtk_box_pack_end (GTK_BOX(vbox), backbutton, FALSE, FALSE, 0);

      GtkWidget* treeview = init_tree();
      GtkWidget* treeview2 = init_tree2();
      struct param* parameters = malloc(sizeof(struct param));
      parameters->backbutton = backbutton;
      parameters->scrolledwindow = scrolledwindow;
      parameters->oldChild= treeview;
      parameters->newChild= treeview2;
      g_signal_connect(treeview, "row-activated", G_CALLBACK(replace_tab), (gpointer) parameters);
      g_signal_connect(backbutton, "clicked", G_CALLBACK(Back), (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;
}

您的小部件包装不好。我建议您尝试GLADE并将其用作游乐场来了解小部件的位置。

还了解将更适合此目的的GTKSTACK，甚至添加"酷"动画过渡。

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