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Learning_GTK4_tree/tests/testtreechanging.c

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/* testtreeview.c
* Copyright (C) 2011 Red Hat, Inc
* Author: Benjamin Otte <otte@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <gtk/gtk.h>
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
#define MIN_ROWS 50
#define MAX_ROWS 150
typedef void (* DoStuffFunc) (GtkTreeView *treeview);
static guint
count_children (GtkTreeModel *model,
GtkTreeIter *parent)
{
GtkTreeIter iter;
guint count = 0;
gboolean valid;
for (valid = gtk_tree_model_iter_children (model, &iter, parent);
valid;
valid = gtk_tree_model_iter_next (model, &iter))
{
count += count_children (model, &iter) + 1;
}
return count;
}
static void
set_rows (GtkTreeView *treeview, guint i)
{
g_assert (i == count_children (gtk_tree_view_get_model (treeview), NULL));
g_object_set_data (G_OBJECT (treeview), "rows", GUINT_TO_POINTER (i));
}
static guint
get_rows (GtkTreeView *treeview)
{
return GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (treeview), "rows"));
}
static void
log_operation_for_path (GtkTreePath *path,
const char *operation_name)
{
char *path_string;
path_string = path ? gtk_tree_path_to_string (path) : g_strdup ("");
g_printerr ("%10s %s\n", operation_name, path_string);
g_free (path_string);
}
static void
log_operation (GtkTreeModel *model,
GtkTreeIter *iter,
const char *operation_name)
{
GtkTreePath *path;
path = gtk_tree_model_get_path (model, iter);
log_operation_for_path (path, operation_name);
gtk_tree_path_free (path);
}
/* moves iter to the next iter in the model in the display order
* inside a treeview. Returns FALSE if no more rows exist.
*/
static gboolean
tree_model_iter_step (GtkTreeModel *model,
GtkTreeIter *iter)
{
GtkTreeIter tmp;
if (gtk_tree_model_iter_children (model, &tmp, iter))
{
*iter = tmp;
return TRUE;
}
do {
tmp = *iter;
if (gtk_tree_model_iter_next (model, iter))
return TRUE;
}
while (gtk_tree_model_iter_parent (model, iter, &tmp));
return FALSE;
}
/* NB: may include invisible iters (because they are collapsed) */
static void
tree_view_random_iter (GtkTreeView *treeview,
GtkTreeIter *iter)
{
guint n_rows = get_rows (treeview);
guint i = g_random_int_range (0, n_rows);
GtkTreeModel *model;
model = gtk_tree_view_get_model (treeview);
if (!gtk_tree_model_get_iter_first (model, iter))
return;
while (i-- > 0)
{
if (!tree_model_iter_step (model, iter))
{
g_assert_not_reached ();
return;
}
}
return;
}
static void
delete (GtkTreeView *treeview)
{
guint n_rows = get_rows (treeview);
GtkTreeModel *model;
GtkTreeIter iter;
model = gtk_tree_view_get_model (treeview);
tree_view_random_iter (treeview, &iter);
n_rows -= count_children (model, &iter) + 1;
log_operation (model, &iter, "remove");
gtk_tree_store_remove (GTK_TREE_STORE (model), &iter);
set_rows (treeview, n_rows);
}
static void
add_one (GtkTreeModel *model,
GtkTreeIter *iter)
{
guint n = gtk_tree_model_iter_n_children (model, iter);
GtkTreeIter new_iter;
static guint counter = 0;
if (n > 0 && g_random_boolean ())
{
GtkTreeIter child;
gtk_tree_model_iter_nth_child (model, &child, iter, g_random_int_range (0, n));
add_one (model, &child);
return;
}
gtk_tree_store_insert_with_values (GTK_TREE_STORE (model),
&new_iter,
iter,
g_random_int_range (-1, n),
0, ++counter,
-1);
log_operation (model, &new_iter, "add");
}
static void
add (GtkTreeView *treeview)
{
GtkTreeModel *model;
model = gtk_tree_view_get_model (treeview);
add_one (model, NULL);
set_rows (treeview, get_rows (treeview) + 1);
}
static void
add_or_delete (GtkTreeView *treeview)
{
guint n_rows = get_rows (treeview);
if (g_random_int_range (MIN_ROWS, MAX_ROWS) >= n_rows)
add (treeview);
else
delete (treeview);
}
/* XXX: We only expand/collapse from the top and not randomly */
static void
expand (GtkTreeView *treeview)
{
GtkTreeModel *model;
GtkTreeIter iter;
GtkTreePath *path;
gboolean valid;
model = gtk_tree_view_get_model (treeview);
for (valid = gtk_tree_model_get_iter_first (model, &iter);
valid;
valid = tree_model_iter_step (model, &iter))
{
if (gtk_tree_model_iter_has_child (model, &iter))
{
path = gtk_tree_model_get_path (model, &iter);
if (!gtk_tree_view_row_expanded (treeview, path))
{
log_operation (model, &iter, "expand");
gtk_tree_view_expand_row (treeview, path, FALSE);
gtk_tree_path_free (path);
return;
}
gtk_tree_path_free (path);
}
}
}
static void
collapse (GtkTreeView *treeview)
{
GtkTreeModel *model;
GtkTreeIter iter;
GtkTreePath *last, *path;
gboolean valid;
model = gtk_tree_view_get_model (treeview);
last = NULL;
for (valid = gtk_tree_model_get_iter_first (model, &iter);
valid;
valid = tree_model_iter_step (model, &iter))
{
path = gtk_tree_model_get_path (model, &iter);
if (gtk_tree_view_row_expanded (treeview, path))
{
if (last)
gtk_tree_path_free (last);
last = path;
}
else
gtk_tree_path_free (path);
}
if (last)
{
log_operation_for_path (last, "collapse");
gtk_tree_view_collapse_row (treeview, last);
gtk_tree_path_free (last);
}
}
static void
select_ (GtkTreeView *treeview)
{
GtkTreeIter iter;
tree_view_random_iter (treeview, &iter);
log_operation (gtk_tree_view_get_model (treeview), &iter, "select");
gtk_tree_selection_select_iter (gtk_tree_view_get_selection (treeview),
&iter);
}
static void
unselect (GtkTreeView *treeview)
{
GtkTreeIter iter;
tree_view_random_iter (treeview, &iter);
log_operation (gtk_tree_view_get_model (treeview), &iter, "unselect");
gtk_tree_selection_unselect_iter (gtk_tree_view_get_selection (treeview),
&iter);
}
static void
reset_model (GtkTreeView *treeview)
{
GtkTreeSelection *selection;
GtkTreeModel *model;
GList *list, *selected;
GtkTreePath *cursor;
selection = gtk_tree_view_get_selection (treeview);
model = g_object_ref (gtk_tree_view_get_model (treeview));
log_operation_for_path (NULL, "reset");
selected = gtk_tree_selection_get_selected_rows (selection, NULL);
gtk_tree_view_get_cursor (treeview, &cursor, NULL);
gtk_tree_view_set_model (treeview, NULL);
gtk_tree_view_set_model (treeview, model);
if (cursor)
{
gtk_tree_view_set_cursor (treeview, cursor, NULL, FALSE);
gtk_tree_path_free (cursor);
}
for (list = selected; list; list = list->next)
{
gtk_tree_selection_select_path (selection, list->data);
}
g_list_free_full (selected, (GDestroyNotify) gtk_tree_path_free);
g_object_unref (model);
}
/* sanity checks */
static void
assert_row_reference_is_path (GtkTreeRowReference *ref,
GtkTreePath *path)
{
GtkTreePath *expected;
if (ref == NULL)
{
g_assert (path == NULL);
return;
}
g_assert (path != NULL);
g_assert (gtk_tree_row_reference_valid (ref));
expected = gtk_tree_row_reference_get_path (ref);
g_assert (expected != NULL);
g_assert (gtk_tree_path_compare (expected, path) == 0);
gtk_tree_path_free (expected);
}
static void
check_cursor (GtkTreeView *treeview)
{
GtkTreeRowReference *ref = g_object_get_data (G_OBJECT (treeview), "cursor");
GtkTreePath *cursor;
gtk_tree_view_get_cursor (treeview, &cursor, NULL);
assert_row_reference_is_path (ref, cursor);
if (cursor)
gtk_tree_path_free (cursor);
}
static void
check_selection_item (GtkTreeModel *model,
GtkTreePath *path,
GtkTreeIter *iter,
gpointer listp)
{
GList **list = listp;
g_assert (*list);
assert_row_reference_is_path ((*list)->data, path);
*list = (*list)->next;
}
static void
check_selection (GtkTreeView *treeview)
{
GList *selection = g_object_get_data (G_OBJECT (treeview), "selection");
gtk_tree_selection_selected_foreach (gtk_tree_view_get_selection (treeview),
check_selection_item,
&selection);
}
static void
check_sanity (GtkTreeView *treeview)
{
check_cursor (treeview);
check_selection (treeview);
}
static gboolean
dance (gpointer treeview)
{
static const DoStuffFunc funcs[] = {
add_or_delete,
add_or_delete,
expand,
collapse,
select_,
unselect,
reset_model
};
guint i;
i = g_random_int_range (0, G_N_ELEMENTS(funcs));
funcs[i] (treeview);
check_sanity (treeview);
return G_SOURCE_CONTINUE;
}
static void
cursor_changed_cb (GtkTreeView *treeview,
gpointer unused)
{
GtkTreePath *path;
GtkTreeRowReference *ref;
gtk_tree_view_get_cursor (treeview, &path, NULL);
if (path)
{
ref = gtk_tree_row_reference_new (gtk_tree_view_get_model (treeview),
path);
gtk_tree_path_free (path);
}
else
ref = NULL;
g_object_set_data_full (G_OBJECT (treeview), "cursor", ref, (GDestroyNotify) gtk_tree_row_reference_free);
}
static void
selection_list_free (gpointer list)
{
g_list_free_full (list, (GDestroyNotify) gtk_tree_row_reference_free);
}
static void
selection_changed_cb (GtkTreeSelection *tree_selection,
gpointer unused)
{
GList *selected, *list;
GtkTreeModel *model;
selected = gtk_tree_selection_get_selected_rows (tree_selection, &model);
for (list = selected; list; list = list->next)
{
GtkTreePath *path = list->data;
list->data = gtk_tree_row_reference_new (model, path);
gtk_tree_path_free (path);
}
g_object_set_data_full (G_OBJECT (gtk_tree_selection_get_tree_view (tree_selection)),
"selection",
selected,
selection_list_free);
}
static void
setup_sanity_checks (GtkTreeView *treeview)
{
g_signal_connect (treeview, "cursor-changed", G_CALLBACK (cursor_changed_cb), NULL);
cursor_changed_cb (treeview, NULL);
g_signal_connect (gtk_tree_view_get_selection (treeview), "changed", G_CALLBACK (selection_changed_cb), NULL);
selection_changed_cb (gtk_tree_view_get_selection (treeview), NULL);
}
static void
quit_cb (GtkWidget *widget,
gpointer data)
{
gboolean *done = data;
*done = TRUE;
g_main_context_wakeup (NULL);
}
int
main (int argc,
char **argv)
{
GtkWidget *window;
GtkWidget *sw;
GtkWidget *treeview;
GtkTreeModel *model;
guint i;
gboolean done = FALSE;
gtk_init ();
if (g_getenv ("RTL"))
gtk_widget_set_default_direction (GTK_TEXT_DIR_RTL);
window = gtk_window_new ();
g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
gtk_window_set_default_size (GTK_WINDOW (window), 430, 400);
sw = gtk_scrolled_window_new ();
gtk_widget_set_hexpand (sw, TRUE);
gtk_widget_set_vexpand (sw, TRUE);
gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
GTK_POLICY_AUTOMATIC,
GTK_POLICY_AUTOMATIC);
gtk_window_set_child (GTK_WINDOW (window), sw);
model = GTK_TREE_MODEL (gtk_tree_store_new (1, G_TYPE_UINT));
treeview = gtk_tree_view_new_with_model (model);
g_object_unref (model);
setup_sanity_checks (GTK_TREE_VIEW (treeview));
gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview),
0,
"Counter",
gtk_cell_renderer_text_new (),
"text", 0,
NULL);
for (i = 0; i < (MIN_ROWS + MAX_ROWS) / 2; i++)
add (GTK_TREE_VIEW (treeview));
gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), treeview);
gtk_window_present (GTK_WINDOW (window));
g_idle_add (dance, treeview);
while (!done)
g_main_context_iteration (NULL, TRUE);
return 0;
}
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