Gtk Tree View

1，要点
1) 一列(GtkTreeColumn)可以有多个Cell Renderer (GtkCellRenderer)，gtk_tree_store_new/gtk_list_store_new的第一个参数是

GtkCellRenderer的总数，而不是GtkTreeColumn的总数。
2) Toggle类型的Cell Renderer(GtkCellRenderToggle)将在对应位置显示Check/Radio Box，对GtkCellRenderToggle的选择和取消选择应该用

gtk_list_store_set重新设置他的值，而不是直接调用接口 gtk_cell_renderer_toggle_set_active，因为这个接口会导致不确定的行被选择

或取消选择


2，例子
#include
enum
{
    COL_MARKED,
    COL_FIRST_NAME = 0,
    COL_LAST_NAME,
    NUM_COLS
} ;

//GtkCellRenderToggle的选择/取消选择处理函数
fixed_toggled (GtkCellRendererToggle *cell, gchar *path_str, gpointer data)
{
    GtkTreeModel *model = (GtkTreeModel *) data;
    GtkTreeIter iter;
    GtkTreePath *path = gtk_tree_path_new_from_string (path_str);
    gboolean fixed;
 
    /* get toggled iter */
    gtk_tree_model_get_iter (model, &iter, path);

    /* Get previous value*/
    gtk_tree_model_get (model, &iter, COL_MARKED, &fixed, -1);

    /* Toggle the previous value */
    fixed ^= 1;
 
    /* set new value */
    gtk_list_store_set (GTK_LIST_STORE (model), &iter, COL_MARKED, fixed, -1);

     /* clean up allocated path*/
     gtk_tree_path_free (path);
}


static GtkTreeModel *create_and_fill_model (void)
{
  GtkTreeStore  *treestore;
  GtkTreeIter    toplevel, child;

    GtkListStore *liststore;

    /* Allocate list store*/
    liststore = gtk_list_store_new(NUM_COLS, G_TYPE_BOOLEAN, G_TYPE_STRING, G_TYPE_STRING);

    /* Append a second top level row, and fill it with some data */
    gtk_tree_store_append(treestore, &toplevel, NULL);
    gtk_tree_store_set(treestore, &toplevel,
                       COL_MARKED, FALSE,
                       COL_FIRST_NAME, "Joe",
                       COL_LAST_NAME, "Average",
                       -1);

    /* Append a child to the second top level row, and fill in some data */
    gtk_tree_store_append(treestore, &child, &toplevel);
    gtk_tree_store_set(treestore, &child,
                       COL_MARKED, FALSE,
                       COL_FIRST_NAME, "Jane",
                       COL_LAST_NAME, "Average",
                       -1);

    return GTK_LIST_MODEL(treestore);
}


static GtkWidget *create_view_and_model (void)
{
    GtkTreeViewColumn   *col;
    GtkCellRenderer     *renderer;
    GtkWidget           *view;
    GtkTreeModel        *model;

    model = create_and_fill_model();

    view = gtk_list_view_new();

    /* --- Column #1 --- */
    col = gtk_tree_view_column_new();
    gtk_tree_view_column_set_title(col, "First Name");
    gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
   
    /* the first cell renderer, its index is COL_MARKED */
    renderer = gtk_cell_renderer_toggle_new();
    g_signal_connect(renderer, "toggled", G_CALLBACK(fixed_toggled),model) ;
    gtk_tree_view_column_pack_start(col, renderer, TRUE);
    gtk_tree_view_add_attribute(col, renderer, "active", COL_MARKED);

    /* the second cell renderer, its index is COL_MARKED */
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_column_pack_start(col, renderer, TRUE);
    gtk_tree_view_add_attribute(col, renderer, "text", COL_FIRST_NAME, NULL);


    /* --- Column #2 --- */
    col = gtk_tree_view_column_new();
    gtk_tree_view_column_set_title(col, "Last Name");
    gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);

    /* The renderer of column 2*/
    renderer = gtk_cell_renderer_text_new();
    gtk_tree_view_column_pack_start(col, renderer, TRUE);
    gtk_tree_view_add_attribute(col, renderer, "text", COL_SECOND_NAME, NULL);

    /* set 'cell-background' property of the cell renderer */
    g_object_set(renderer,
                 "cell-background", "Orange",
                 "cell-background-set", TRUE,
                  NULL);


    gtk_tree_view_set_model(GTK_TREE_VIEW(view), model);
    g_object_unref(model); /* destroy model automatically with view */
    gtk_tree_selection_set_mode(gtk_tree_view_get_selection(GTK_TREE_VIEW(view)), GTK_SELECTION_NONE);

    return view;
}


int main (int argc, char **argv)
{
    GtkWidget *window;
    GtkWidget *view;

    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    g_signal_connect(window, "delete_event", gtk_main_quit, NULL); /* dirty */

    view = create_view_and_model();

    gtk_container_add(GTK_CONTAINER(window), view);

    gtk_widget_show_all(window);

    gtk_main();

    return 0;
}


3，备注：
文中代码未经编译调试。


4，参考文献
1) http://library.gnome.org/devel/gtk/stable/TreeWidgetObjects.html
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