代码之家 › 专栏 › 技术社区 › Sagar Mohantu

gtk获取在liststore树视图中单击的项目

gtk treeview list linux c

Sagar Mohantu · 技术社区 · 8 年前

我想获得在树视图中单击的项目,该项目会导致“行激活”事件。我在树视图中有一个列表存储。单击其中的任何项目都会显示另一个列表。但我怎么知道点击了哪个项目? 我怎么找到它? 代码-

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, "Register", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "New Configuration", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "Edit Configuration", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "Delete Configuration", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "Add location to turn-off place list", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "Disable Turn-off Places", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "Enable Turn-off Places", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "Disable Distance", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "Enable Distance", -1);
    gtk_list_store_append(liststore, &treeiter);
    gtk_list_store_set(liststore, &treeiter, 0, "Factory Reset", -1);
    gtk_list_store_append(liststore, &treeiter);
    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("Settings",
                                                                                 cellrenderertext,
                                                                                 "text", 0,
                                                                                 NULL);
    gtk_tree_view_append_column(GTK_TREE_VIEW(treeview), treeviewcolumn);

    return treeview;
}

static void replace_tab(GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
{
..........
}

int main(...)
{
....
g_signal_connect(treeview, "row-activated", G_CALLBACK(replace_tab), (gpointer) parameters);

.....
}

1 回复 | 直到 8 年前

José Fonte 8 年前

获取 treeview 双击选择( row-activated )是:

1.使用来自 行已激活 回调

来自的信号处理程序信号为:

void
user_function (GtkTreeView       *tree_view,
               GtkTreePath       *path,
               GtkTreeViewColumn *column,
               gpointer           user_data)

我们可以从具有暴露变量的模型中检索数据;从 GtkTreePath path 我们得到了 GtkTreeIter iter 从 GtkTreeView treeview 我们可以得到 GtkTreeModel model . 拥有 model iter 我们可以从 模型 ; 例如,在你的 replace_tab 信号处理程序,添加以下内容:

static void replace_tab(GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
{
   gchar *string;
   GtkTreeIter iter;
   GtkTreeModel *model = gtk_tree_view_get_model (tree_view);
   gtk_tree_model_get_iter(model, &iter, path); 
   gtk_tree_model_get (model, &iter, 0, &string, -1);
   g_print ("activated: %s\n", string);
   ...

 }

这将打印激活行中的文本

2、使用GtkTreeSelection

另一种选择是使用 GtkTreeSelection 我们可以从 GtkTreeView 它本身这一步允许我们提取选定的 iter (树状图上的单选),我们将使用它从 模型 ; 例如在你的 替换_选项卡 信号处理程序,添加以下内容:

static void replace_tab(GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
{ 
   gchar *string;
   GtkTreeIter iter;
   GtkTreeSelection *selection;
   GtkTreeModel *model = gtk_tree_view_get_model (tree_view);

   selection = gtk_tree_view_get_selection (tree_view);
   gtk_tree_selection_get_selected (selection, &model, &iter); 
   gtk_tree_model_get (model, &iter, 0, &string, -1);
   g_print ("activated: %s\n", string);
   ...
}

结论:

选项1)更简单、更干净、更直接。通常2)它用于通过 changed 信号由发出 GTK重新选择 .