我想获取在树视图中单击的项目,这会导致“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将显示另一个列表。但是我怎么知道点击了哪个项目? 我怎么找到的? 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);
.....
}
答案 0 :(得分:3)
双击(treeview
)时获取row-activated
选项的最常用方法是:
<强> 1。使用row-activated
回调
来自row-activated
信号的信号处理程序是:
void user_function (GtkTreeView *tree_view, GtkTreePath *path, GtkTreeViewColumn *column, gpointer user_data)
我们可以使用公开的变量从模型中检索数据;从GtkTreePath path
我们得到GtkTreeIter iter
,从GtkTreeView treeview
我们得到GtkTreeModel model
。拥有model
和iter
,我们可以从model
检索数据;例如。在replace_tab
信号处理程序中,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);
...
}
这应该从激活的行
打印文本<强> 2。使用GtkTreeSelection
另一种选择是使用我们可以从GtkTreeSelection
本身检索的GtkTreeView
。此步骤允许我们提取选定的iter
(树视图上的单个选择),我们将从model
获取数据;例如,在replace_tab
信号处理程序中,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);
...
}
<强>结论:强>
选项1)它更容易,更清洁,更直接。通常2)它用于通过changed
发出的GtkTreeSelection
信号进行选择更改。