GTK Tree View # How to remove or hide the toggle button in column - gtk

Question

There is defined a GTK tree view and one of the column is rendered the toggle button. Now every row is showing the toggle button, is there a way to remove or hide the toggle button from some row completely. For example I have following example
#include <gtk/gtk.h>
enum {
COL_NUM_LIST = 0,
COL_TOGGLE,
COL_STRING,
NUM_COLS
};
static GtkTreeModel*
create_and_fill_model(void) {
GtkTreeStore *treestore;
GtkTreeIter toplevel, child;
treestore = gtk_tree_store_new(NUM_COLS,
G_TYPE_STRING,
G_TYPE_BOOLEAN,
G_TYPE_STRING);
/* Append a top level row and leave it empty */
gtk_tree_store_append(treestore, &toplevel, NULL);
gtk_tree_store_set(treestore, &toplevel,
COL_NUM_LIST, "1",
COL_TOGGLE, TRUE,
COL_STRING, "Foo Bar",
-1);
/* 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_NUM_LIST, "2",
COL_TOGGLE, TRUE,
COL_STRING, "", // empty
-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_NUM_LIST, "3",
COL_TOGGLE, FALSE,
COL_STRING, "Not needed toggle button here",
-1);
return GTK_TREE_MODEL(treestore);
}
void string_cell_data_func(GtkTreeViewColumn *col, GtkCellRenderer *renderer,
GtkTreeModel *model, GtkTreeIter *iter, gpointer user_data) {
char *string;
gtk_tree_model_get(model, iter, COL_STRING, &string, -1);
g_object_set(renderer, "text", string, NULL);
}
void toggle_cell_data_func(GtkTreeViewColumn *col, GtkCellRenderer *renderer,
GtkTreeModel *model, GtkTreeIter *iter, gpointer user_data) {
int bol;
gtk_tree_model_get(model, iter, COL_TOGGLE, &bol, -1);
if (bol == 0)
g_object_set(renderer, "active", NULL, NULL); // Can we somehow null or remove toggle button
else
g_object_set(renderer, "active", TRUE, NULL);
}
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, "#");
/* pack tree view column into tree view */
gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
// toggle renderer
renderer = gtk_cell_renderer_text_new();
/* pack cell renderer into tree view column */
gtk_tree_view_column_pack_start(col, renderer, TRUE);
gtk_tree_view_column_add_attribute(col, renderer, "text", COL_NUM_LIST);
// --- Column #2 ---
col = gtk_tree_view_column_new();
gtk_tree_view_column_set_title(col, "Toggle");
/* pack tree view column into tree view */
gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
// toggle renderer
renderer = gtk_cell_renderer_toggle_new();
/* pack cell renderer into tree view column */
gtk_tree_view_column_pack_start(col, renderer, TRUE);
gtk_tree_view_column_set_cell_data_func(col, renderer,
toggle_cell_data_func, NULL, NULL);
// --- Column #3 ---
col = gtk_tree_view_column_new();
gtk_tree_view_column_set_title(col, "String");
/* pack tree view column into tree view */
gtk_tree_view_append_column(GTK_TREE_VIEW(view), col);
// text renderer
renderer = gtk_cell_renderer_text_new();
/* pack cell renderer into tree view column */
gtk_tree_view_column_pack_start(col, renderer, TRUE);
gtk_tree_view_column_set_cell_data_func(col, renderer,
string_cell_data_func, NULL, 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;
}
Compiled and run with GTK 3 , it creates following windows
So, I don't need toggle button at #3 leave of tree. How can I hide it.
P.S : I know that using GTK, I can set the state of button to disable or inconsistent, but can I completely hide it?

Answer 1

You could probably revise the properties you are setting via the "g_object_set" function as in the following code snippet.
void toggle_cell_data_func(GtkTreeViewColumn *col, GtkCellRenderer *renderer,
GtkTreeModel *model, GtkTreeIter *iter, gpointer user_data)
{
int bol;
gtk_tree_model_get(model, iter, COL_TOGGLE, &bol, -1);
if (bol == 0)
g_object_set(renderer, "visible", NULL, NULL); // Can we somehow null or remove toggle button
else
{
g_object_set(renderer, "visible", TRUE, "active", TRUE, NULL);
}
}
For the toggle button that should not appear, I utilized the "visible" property in lieu of the "active" property. That yielded the following sample image.
See if that helps.
Regards.