更改GTK树视图的内容 [英] Changing the content of a GTK Tree View
问题描述
我有一个简单的GTK程序，它可以创建树状视图:
I have a simple GTK program that creates a Tree View:
static GtkTreeModel *
create_and_fill_model (void)
{
GtkListStore *store;
GtkTreeIter iter;
store = gtk_list_store_new (NUM_COLS, G_TYPE_STRING, G_TYPE_UINT);
/*here is some code adding rows using
gtk_list_store_append
gtk_list_store_set*/
return GTK_TREE_MODEL (store);
}
static GtkWidget *
create_view_and_model (void)
{
GtkCellRenderer *renderer;
GtkTreeModel *model;
GtkWidget *view;
view = gtk_tree_view_new ();
renderer = gtk_cell_renderer_text_new ();
gtk_tree_view_insert_column_with_attributes
(GTK_TREE_VIEW(view),-1,"Name",renderer,"text", COL_NAME,NULL);
renderer = gtk_cell_renderer_text_new ();
gtk_tree_view_insert_column_with_attributes
(GTK_TREE_VIEW(view),-1,"Age",renderer,"text", COL_AGE,NULL);
model = create_and_fill_model ();
gtk_tree_view_set_model (GTK_TREE_VIEW (view), model);
g_object_unref (model);
return view;
}
int
main (int argc, char **argv)
{
//usual stuff
view = create_view_and_model ();
gtk_container_add (GTK_CONTAINER (window), view);
//usual stuff
}
有人可以告诉我现在如何更改此树形视图的内容吗?我是否必须再次创建视图"对象?还是我应该打电话 gtk_tree_view_set_model是否具有新模型?
Can somebody tell me how do I now change the content of this treeview? Do I have to create the "view" object again? Or am I supposed to call gtk_tree_view_set_model with new model?
推荐答案
要更改GtkTreeView的内容，必须使用模型.在您的函数中:
To change the contents of the GtkTreeView you must use the model. In your function:
static GtkTreeModel *
create_and_fill_model (void)
{
GtkListStore *store;
GtkTreeIter iter;
store = gtk_list_store_new (NUM_COLS, G_TYPE_STRING, G_TYPE_UINT);
/*here is some code adding rows using
gtk_list_store_append
gtk_list_store_set*/
return GTK_TREE_MODEL (store);
}
它已注释了应该添加数据，检索GtkTreeIter并使用给定的迭代器和函数gtk_list_store_set设置数据的位置.
It's commented the place where you should append data, retrieve the GtkTreeIter and set data with the given iterator and function gtk_list_store_set.
您省略了列的枚举器，但是从模型GtkListStore创建可以看出，您将有2列，其中一列包含字符串，另一列包含无符号整数. GtkTreeModel是商店(树存储和列表存储)实现的接口.
You omitted the enumerator for columns but as can be seen from the model GtkListStore creation, you will have 2 columns, one containing strings and other containing unsigned integers. GtkTreeModel is an interface which the stores (tree store and list store) implement.
GtkTreeView遵循MVC(模型视图控制器)模式，因此该视图将反映来自模型的视图，并且模型可以具有许多视图.想象一下文件浏览器，其中模型包含有关文件的信息，但是您可以拥有多个视图，图标视图或列表视图.
GtkTreeView follows the MVC (Model View Controller) pattern, so the view will reflect a view from a model and a model can have many views. Imagine the file browser where the model contains information about the files but you can have several views, icons view or list view.
以下是一个示例，与您显示的示例非常相似:
Here is an example, very similar to the one you are showing:
#include <gtk/gtk.h>
enum
{
COL_FIRST_NAME = 0,
COL_AGE,
NUM_COLS
} ;
static GtkTreeModel *
create_and_fill_model (void)
{
GtkListStore *liststore;
GtkTreeIter iter;
liststore = gtk_list_store_new(NUM_COLS, G_TYPE_STRING, G_TYPE_UINT);
gtk_list_store_append(liststore, &iter);
gtk_list_store_set(liststore, &iter,
COL_FIRST_NAME, "Joe",
COL_AGE, 20,
-1);
gtk_list_store_append(liststore, &iter);
gtk_list_store_set(liststore, &iter,
COL_FIRST_NAME, "Jane",
COL_AGE, 24,
-1);
return GTK_TREE_MODEL(liststore);
}
static GtkWidget *
create_view_and_model (void)
{
GtkTreeViewColumn *col;
GtkCellRenderer *renderer;
GtkWidget *view;
GtkTreeModel *model;
view = gtk_tree_view_new();
/* --- Column #1 --- */
col = gtk_tree_view_column_new();
gtk_tree_view_column_set_title(col, "First Name");
/* pack tree view column into tree view */
gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
/* New text renderer */
renderer = gtk_cell_renderer_text_new();
/* pack cell renderer into tree view column */
gtk_tree_view_column_pack_start(col, renderer, TRUE);
/* Set view column to model column */
gtk_tree_view_column_set_attributes(col, renderer, "text", COL_FIRST_NAME, NULL);
/* --- Column #2 --- */
col = gtk_tree_view_column_new();
gtk_tree_view_column_set_title(col, "Age");
/* pack tree view column into tree view */
gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
/* New text renderer */
renderer = gtk_cell_renderer_text_new();
/* pack cell renderer into tree view column */
gtk_tree_view_column_pack_start(col, renderer, TRUE);
/* Set view column to model column */
gtk_tree_view_column_set_attributes(col, renderer, "text", COL_AGE, NULL);
model = create_and_fill_model();
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;
}
请注意如何在create_and_fill_model函数中将数据添加到模型(GtkListStore):
Notice how we add data to the model (GtkListStore) in the create_and_fill_model function:
...
gtk_list_store_append(liststore, &iter);
gtk_list_store_set(liststore, &iter,
COL_FIRST_NAME, "Joe",
COL_AGE, 20,
-1);
...
还要检查我们如何将数据从视图列绑定到模型列:
Check also how we bind data from the view columns to the model columns:
gtk_tree_view_column_set_attributes(col, renderer, "text", COL_FIRST_NAME, NULL);
其中col是带有CellRendererText renderer的第一列.
Where col is the first column with a CellRendererText renderer.
使用(将文件命名为main.c)编译给定的示例:
Compile the given example with (name the file, main.c):
gcc -o main main.c `pkg-config --cflags --libs gtk+-3.0`
结果应该是这样的:
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