gtk2/demos/gtk-demo/listview_settings.c
Matthias Clasen 04c3c659f5 gtk-demo: Plug a small memory leak
The settings demo was leaking a GtkBuilderScope.
2020-08-06 21:13:39 -04:00

430 lines
13 KiB
C

/* Lists/Settings
*
* This demo shows a settings viewer for GSettings.
*
* It demonstrates how to implement support for trees with GtkListView.
* It also shows how to set up sorting and filtering for columns in a
* GtkColumnView.
*/
#include <gtk/gtk.h>
#include <stdlib.h>
/* Create an object that wraps GSettingsSchemaKey because that's a boxed type */
typedef struct _SettingsKey SettingsKey;
struct _SettingsKey
{
GObject parent_instance;
GSettings *settings;
GSettingsSchemaKey *key;
};
enum {
PROP_0,
PROP_NAME,
PROP_SUMMARY,
PROP_DESCRIPTION,
PROP_VALUE,
PROP_TYPE,
PROP_DEFAULT_VALUE,
N_PROPS
};
#define SETTINGS_TYPE_KEY (settings_key_get_type ())
G_DECLARE_FINAL_TYPE (SettingsKey, settings_key, SETTINGS, KEY, GObject);
G_DEFINE_TYPE (SettingsKey, settings_key, G_TYPE_OBJECT);
static GParamSpec *properties[N_PROPS] = { NULL, };
static void
settings_key_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
SettingsKey *self = SETTINGS_KEY (object);
switch (property_id)
{
case PROP_DESCRIPTION:
g_value_set_string (value, g_settings_schema_key_get_description (self->key));
break;
case PROP_NAME:
g_value_set_string (value, g_settings_schema_key_get_name (self->key));
break;
case PROP_SUMMARY:
g_value_set_string (value, g_settings_schema_key_get_summary (self->key));
break;
case PROP_VALUE:
{
GVariant *variant = g_settings_get_value (self->settings, g_settings_schema_key_get_name (self->key));
g_value_take_string (value, g_variant_print (variant, FALSE));
g_variant_unref (variant);
}
break;
case PROP_TYPE:
{
const GVariantType *type = g_settings_schema_key_get_value_type (self->key);
g_value_set_string (value, g_variant_type_peek_string (type));
}
break;
case PROP_DEFAULT_VALUE:
{
GVariant *variant = g_settings_schema_key_get_default_value (self->key);
g_value_take_string (value, g_variant_print (variant, FALSE));
g_variant_unref (variant);
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
settings_key_finalize (GObject *object)
{
SettingsKey *self = SETTINGS_KEY (object);
g_object_unref (self->settings);
g_settings_schema_key_unref (self->key);
G_OBJECT_CLASS (settings_key_parent_class)->finalize (object);
}
static void
settings_key_class_init (SettingsKeyClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->finalize = settings_key_finalize;
gobject_class->get_property = settings_key_get_property;
properties[PROP_DESCRIPTION] =
g_param_spec_string ("description", NULL, NULL, NULL, G_PARAM_READABLE);
properties[PROP_NAME] =
g_param_spec_string ("name", NULL, NULL, NULL, G_PARAM_READABLE);
properties[PROP_SUMMARY] =
g_param_spec_string ("summary", NULL, NULL, NULL, G_PARAM_READABLE);
properties[PROP_VALUE] =
g_param_spec_string ("value", NULL, NULL, NULL, G_PARAM_READABLE);
properties[PROP_TYPE] =
g_param_spec_string ("type", NULL, NULL, NULL, G_PARAM_READABLE);
properties[PROP_DEFAULT_VALUE] =
g_param_spec_string ("default-value", NULL, NULL, NULL, G_PARAM_READABLE);
g_object_class_install_properties (gobject_class, N_PROPS, properties);
}
static void
settings_key_init (SettingsKey *self)
{
}
static SettingsKey *
settings_key_new (GSettings *settings,
GSettingsSchemaKey *key)
{
SettingsKey *result = g_object_new (SETTINGS_TYPE_KEY, NULL);
result->settings = g_object_ref (settings);
result->key = g_settings_schema_key_ref (key);
return result;
}
static void
item_value_changed (GtkEditableLabel *label,
GParamSpec *pspec,
GtkListItem *item)
{
SettingsKey *self;
const char *text;
const GVariantType *type;
GVariant *variant;
GError *error = NULL;
const char *name;
char *value;
text = gtk_editable_get_text (GTK_EDITABLE (label));
g_object_get (item, "item", &self, NULL);
g_object_unref (self);
type = g_settings_schema_key_get_value_type (self->key);
name = g_settings_schema_key_get_name (self->key);
variant = g_variant_parse (type, text, NULL, NULL, &error);
if (!variant)
{
g_warning ("%s", error->message);
g_clear_error (&error);
goto revert;
}
if (!g_settings_schema_key_range_check (self->key, variant))
{
g_warning ("Not a valid value for %s", name);
goto revert;
}
g_settings_set_value (self->settings, name, variant);
g_variant_unref (variant);
return;
revert:
gtk_widget_error_bell (GTK_WIDGET (label));
g_object_get (self, "value", &value, NULL);
gtk_editable_set_text (GTK_EDITABLE (label), value);
g_free (value);
}
static int
strvcmp (gconstpointer p1,
gconstpointer p2)
{
const char * const *s1 = p1;
const char * const *s2 = p2;
return strcmp (*s1, *s2);
}
static GtkFilter *current_filter;
static gboolean
transform_settings_to_keys (GBinding *binding,
const GValue *from_value,
GValue *to_value,
gpointer data)
{
GtkTreeListRow *treelistrow;
GSettings *settings;
GSettingsSchema *schema;
GListStore *store;
GtkSortListModel *sort_model;
GtkFilterListModel *filter_model;
GtkFilter *filter;
char **keys;
guint i;
treelistrow = g_value_get_object (from_value);
if (treelistrow == NULL)
return TRUE;
settings = gtk_tree_list_row_get_item (treelistrow);
g_object_get (settings, "settings-schema", &schema, NULL);
store = g_list_store_new (SETTINGS_TYPE_KEY);
keys = g_settings_schema_list_keys (schema);
for (i = 0; keys[i] != NULL; i++)
{
GSettingsSchemaKey *almost_there = g_settings_schema_get_key (schema, keys[i]);
SettingsKey *finally = settings_key_new (settings, almost_there);
g_list_store_append (store, finally);
g_object_unref (finally);
g_settings_schema_key_unref (almost_there);
}
g_strfreev (keys);
g_settings_schema_unref (schema);
g_object_unref (settings);
sort_model = gtk_sort_list_model_new (G_LIST_MODEL (store),
g_object_ref (gtk_column_view_get_sorter (GTK_COLUMN_VIEW (data))));
filter = gtk_string_filter_new (gtk_property_expression_new (SETTINGS_TYPE_KEY, NULL, "name"));
g_set_object (&current_filter, filter);
filter_model = gtk_filter_list_model_new (G_LIST_MODEL (sort_model), filter);
g_value_take_object (to_value, gtk_no_selection_new (G_LIST_MODEL (filter_model)));
return TRUE;
}
static GListModel *
create_settings_model (gpointer item,
gpointer unused)
{
GSettings *settings = item;
char **schemas;
GListStore *result;
guint i;
if (settings == NULL)
{
g_settings_schema_source_list_schemas (g_settings_schema_source_get_default (),
TRUE,
&schemas,
NULL);
}
else
{
schemas = g_settings_list_children (settings);
}
if (schemas == NULL || schemas[0] == NULL)
{
g_free (schemas);
return NULL;
}
qsort (schemas, g_strv_length (schemas), sizeof (char *), strvcmp);
result = g_list_store_new (G_TYPE_SETTINGS);
for (i = 0; schemas[i] != NULL; i++)
{
GSettings *child;
if (settings == NULL)
child = g_settings_new (schemas[i]);
else
child = g_settings_get_child (settings, schemas[i]);
g_list_store_append (result, child);
g_object_unref (child);
}
g_strfreev (schemas);
return G_LIST_MODEL (result);
}
static void
search_enabled (GtkSearchEntry *entry)
{
gtk_editable_set_text (GTK_EDITABLE (entry), "");
}
static void
search_changed (GtkSearchEntry *entry,
gpointer data)
{
const char *text = gtk_editable_get_text (GTK_EDITABLE (entry));
if (current_filter)
gtk_string_filter_set_search (GTK_STRING_FILTER (current_filter), text);
}
static void
stop_search (GtkSearchEntry *entry,
gpointer data)
{
gtk_editable_set_text (GTK_EDITABLE (entry), "");
if (current_filter)
gtk_string_filter_set_search (GTK_STRING_FILTER (current_filter), "");
}
static GtkWidget *window = NULL;
GtkWidget *
do_listview_settings (GtkWidget *do_widget)
{
if (window == NULL)
{
GtkWidget *listview, *columnview;
GListModel *model;
GtkTreeListModel *treemodel;
GtkSingleSelection *selection;
GtkBuilderScope *scope;
GtkBuilder *builder;
GtkColumnViewColumn *name_column;
GtkColumnViewColumn *type_column;
GtkColumnViewColumn *default_column;
GtkColumnViewColumn *summary_column;
GtkColumnViewColumn *description_column;
GtkSorter *sorter;
GActionGroup *actions;
GAction *action;
g_type_ensure (SETTINGS_TYPE_KEY);
scope = gtk_builder_cscope_new ();
gtk_builder_cscope_add_callback_symbol (GTK_BUILDER_CSCOPE (scope), "search_enabled", (GCallback)search_enabled);
gtk_builder_cscope_add_callback_symbol (GTK_BUILDER_CSCOPE (scope), "search_changed", (GCallback)search_changed);
gtk_builder_cscope_add_callback_symbol (GTK_BUILDER_CSCOPE (scope), "stop_search", (GCallback)stop_search);
gtk_builder_cscope_add_callback_symbol (GTK_BUILDER_CSCOPE (scope), "item_value_changed", (GCallback)item_value_changed);
builder = gtk_builder_new ();
gtk_builder_set_scope (builder, scope);
g_object_unref (scope);
gtk_builder_add_from_resource (builder, "/listview_settings/listview_settings.ui", NULL);
window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
gtk_window_set_display (GTK_WINDOW (window),
gtk_widget_get_display (do_widget));
g_object_add_weak_pointer (G_OBJECT (window), (gpointer *) &window);
listview = GTK_WIDGET (gtk_builder_get_object (builder, "listview"));
columnview = GTK_WIDGET (gtk_builder_get_object (builder, "columnview"));
type_column = GTK_COLUMN_VIEW_COLUMN (gtk_builder_get_object (builder, "type_column"));
default_column = GTK_COLUMN_VIEW_COLUMN (gtk_builder_get_object (builder, "default_column"));
summary_column = GTK_COLUMN_VIEW_COLUMN (gtk_builder_get_object (builder, "summary_column"));
description_column = GTK_COLUMN_VIEW_COLUMN (gtk_builder_get_object (builder, "description_column"));
actions = G_ACTION_GROUP (g_simple_action_group_new ());
action = G_ACTION (g_property_action_new ("show-type", type_column, "visible"));
g_action_map_add_action (G_ACTION_MAP (actions), action);
g_object_unref (action);
action = G_ACTION (g_property_action_new ("show-default", default_column, "visible"));
g_action_map_add_action (G_ACTION_MAP (actions), action);
g_object_unref (action);
action = G_ACTION (g_property_action_new ("show-summary", summary_column, "visible"));
g_action_map_add_action (G_ACTION_MAP (actions), action);
g_object_unref (action);
action = G_ACTION (g_property_action_new ("show-description", description_column, "visible"));
g_action_map_add_action (G_ACTION_MAP (actions), action);
g_object_unref (action);
gtk_widget_insert_action_group (columnview, "columnview", actions);
g_object_unref (actions);
model = create_settings_model (NULL, NULL);
treemodel = gtk_tree_list_model_new (model,
FALSE,
TRUE,
create_settings_model,
NULL,
NULL);
selection = gtk_single_selection_new (G_LIST_MODEL (treemodel));
g_object_bind_property_full (selection, "selected-item",
columnview, "model",
G_BINDING_SYNC_CREATE,
transform_settings_to_keys,
NULL,
columnview, NULL);
gtk_list_view_set_model (GTK_LIST_VIEW (listview), G_LIST_MODEL (selection));
g_object_unref (selection);
name_column = GTK_COLUMN_VIEW_COLUMN (gtk_builder_get_object (builder, "name_column"));
sorter = gtk_string_sorter_new (gtk_property_expression_new (SETTINGS_TYPE_KEY, NULL, "name"));
gtk_column_view_column_set_sorter (name_column, sorter);
g_object_unref (sorter);
g_object_unref (builder);
}
if (!gtk_widget_get_visible (window))
gtk_widget_show (window);
else
gtk_window_destroy (GTK_WINDOW (window));
return window;
}