/* GIMP - The GNU Image Manipulation Program * Copyright (C) 1995-1997 Spencer Kimball and Peter Mattis * * gimppropwidgets.c * Copyright (C) 2002-2004 Michael Natterer * Sven Neumann * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include "config.h" #include #include #include #include "libgimpcolor/gimpcolor.h" #include "libgimpmath/gimpmath.h" #include "libgimpbase/gimpbase.h" #include "libgimpconfig/gimpconfig.h" #include "libgimpwidgets/gimpwidgets.h" #include "widgets-types.h" #include "core/gimpcontext.h" #include "core/gimpviewable.h" #include "gimpcolorpanel.h" #include "gimpdnd.h" #include "gimpscalebutton.h" #include "gimpview.h" #include "gimppropwidgets.h" #include "gimpwidgets-constructors.h" #include "gimpwidgets-utils.h" #include "gimp-intl.h" /* utility function prototypes */ static void set_param_spec (GObject *object, GtkWidget *widget, GParamSpec *param_spec); static GParamSpec * get_param_spec (GObject *object); static GParamSpec * find_param_spec (GObject *object, const gchar *property_name, const gchar *strloc); static GParamSpec * check_param_spec (GObject *object, const gchar *property_name, GType type, const gchar *strloc); static GParamSpec * check_param_spec_w (GObject *object, const gchar *property_name, GType type, const gchar *strloc); static void connect_notify (GObject *config, const gchar *property_name, GCallback callback, gpointer callback_data); /*********************/ /* expanding frame */ /*********************/ GtkWidget * gimp_prop_expanding_frame_new (GObject *config, const gchar *property_name, const gchar *button_label, GtkWidget *child, GtkWidget **button) { GtkWidget *frame; GtkWidget *toggle; gboolean value; if (! check_param_spec_w (config, property_name, G_TYPE_PARAM_BOOLEAN, G_STRFUNC)) return NULL; frame = gimp_frame_new (NULL); toggle = gimp_prop_check_button_new (config, property_name, button_label); gtk_frame_set_label_widget (GTK_FRAME (frame), toggle); gtk_widget_show (toggle); gtk_container_add (GTK_CONTAINER (frame), child); g_object_get (config, property_name, &value, NULL); if (value) gtk_widget_show (child); g_signal_connect_object (toggle, "toggled", G_CALLBACK (gimp_toggle_button_set_visible), child, 0); if (button) *button = toggle; return frame; } /****************/ /* paint menu */ /****************/ static void gimp_prop_paint_menu_callback (GtkWidget *widget, GObject *config); static void gimp_prop_paint_menu_notify (GObject *config, GParamSpec *param_spec, GtkWidget *menu); /** * gimp_prop_paint_mode_menu_new: * @config: #GimpConfig object to which property is attached. * @property_name: Name of Enum property. * @with_behind_mode: Whether to include "Behind" mode in the menu. * @with_replace_modes: Whether to include the "Replace", "Erase" and * "Anti Erase" modes in the menu. * * Creates a #GimpPaintModeMenu widget to display and set the specified * Enum property, for which the enum must be #GimpLayerModeEffects. * * Return value: The newly created #GimpPaintModeMenu widget. * * Since GIMP 2.4 */ GtkWidget * gimp_prop_paint_mode_menu_new (GObject *config, const gchar *property_name, gboolean with_behind_mode, gboolean with_replace_modes) { GParamSpec *param_spec; GtkWidget *menu; gint value; param_spec = check_param_spec_w (config, property_name, G_TYPE_PARAM_ENUM, G_STRFUNC); if (! param_spec) return NULL; g_object_get (config, property_name, &value, NULL); menu = gimp_paint_mode_menu_new (with_behind_mode, with_replace_modes); gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (menu), value, G_CALLBACK (gimp_prop_paint_menu_callback), config); set_param_spec (G_OBJECT (menu), menu, param_spec); connect_notify (config, property_name, G_CALLBACK (gimp_prop_paint_menu_notify), menu); return menu; } static void gimp_prop_paint_menu_callback (GtkWidget *widget, GObject *config) { GParamSpec *param_spec; gint value; param_spec = get_param_spec (G_OBJECT (widget)); if (! param_spec) return; if (gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget), &value)) { g_object_set (config, param_spec->name, value, NULL); } } static void gimp_prop_paint_menu_notify (GObject *config, GParamSpec *param_spec, GtkWidget *menu) { gint value; g_object_get (config, param_spec->name, &value, NULL); g_signal_handlers_block_by_func (menu, gimp_prop_paint_menu_callback, config); gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (menu), value); g_signal_handlers_unblock_by_func (menu, gimp_prop_paint_menu_callback, config); } /******************/ /* color button */ /******************/ static void gimp_prop_color_button_callback (GtkWidget *widget, GObject *config); static void gimp_prop_color_button_notify (GObject *config, GParamSpec *param_spec, GtkWidget *button); /** * gimp_prop_color_button_new: * @config: #GimpConfig object to which property is attached. * @property_name: Name of #GimpRGB property. * @title: Title of the #GimpColorPanel that is to be created * @width: Width of color button. * @height: Height of color button. * @type: How transparency is represented. * * Creates a #GimpColorPanel to set and display the value of a #GimpRGB * property. Pressing the button brings up a color selector dialog. * * Return value: A new #GimpColorPanel widget. * * Since GIMP 2.4 */ GtkWidget * gimp_prop_color_button_new (GObject *config, const gchar *property_name, const gchar *title, gint width, gint height, GimpColorAreaType type) { GParamSpec *param_spec; GtkWidget *button; GimpRGB *value; param_spec = check_param_spec_w (config, property_name, GIMP_TYPE_PARAM_RGB, G_STRFUNC); if (! param_spec) return NULL; g_object_get (config, property_name, &value, NULL); button = gimp_color_panel_new (title, value, type, width, height); g_free (value); set_param_spec (G_OBJECT (button), button, param_spec); g_signal_connect (button, "color-changed", G_CALLBACK (gimp_prop_color_button_callback), config); connect_notify (config, property_name, G_CALLBACK (gimp_prop_color_button_notify), button); return button; } static void gimp_prop_color_button_callback (GtkWidget *button, GObject *config) { GParamSpec *param_spec; GimpRGB value; param_spec = get_param_spec (G_OBJECT (button)); if (! param_spec) return; gimp_color_button_get_color (GIMP_COLOR_BUTTON (button), &value); g_signal_handlers_block_by_func (config, gimp_prop_color_button_notify, button); g_object_set (config, param_spec->name, &value, NULL); g_signal_handlers_unblock_by_func (config, gimp_prop_color_button_notify, button); } static void gimp_prop_color_button_notify (GObject *config, GParamSpec *param_spec, GtkWidget *button) { GimpRGB *value; g_object_get (config, param_spec->name, &value, NULL); g_signal_handlers_block_by_func (button, gimp_prop_color_button_callback, config); gimp_color_button_set_color (GIMP_COLOR_BUTTON (button), value); g_free (value); g_signal_handlers_unblock_by_func (button, gimp_prop_color_button_callback, config); } /******************/ /* scale button */ /******************/ static void gimp_prop_scale_button_callback (GtkWidget *widget, gdouble value, GObject *config); static void gimp_prop_scale_button_notify (GObject *config, GParamSpec *param_spec, GtkWidget *button); /** * gimp_prop_scale_button_new: * @config: #GimpConfig object to which property is attached. * @property_name: Name of gdouble property * * Creates a #GimpScaleButton to set and display the value of a * gdouble property in a very space-efficient way. * * Return value: A new #GimpScaleButton widget. * * Since GIMP 2.6 */ GtkWidget * gimp_prop_scale_button_new (GObject *config, const gchar *property_name) { GParamSpec *param_spec; GtkWidget *button; gdouble value; param_spec = check_param_spec_w (config, property_name, G_TYPE_PARAM_DOUBLE, G_STRFUNC); if (! param_spec) return NULL; g_object_get (config, param_spec->name, &value, NULL); button = gimp_scale_button_new (value, G_PARAM_SPEC_DOUBLE (param_spec)->minimum, G_PARAM_SPEC_DOUBLE (param_spec)->maximum); set_param_spec (G_OBJECT (button), button, param_spec); g_signal_connect (button, "value-changed", G_CALLBACK (gimp_prop_scale_button_callback), config); connect_notify (config, property_name, G_CALLBACK (gimp_prop_scale_button_notify), button); return button; } static void gimp_prop_scale_button_callback (GtkWidget *button, gdouble value, GObject *config) { GParamSpec *param_spec; param_spec = get_param_spec (G_OBJECT (button)); if (! param_spec) return; g_signal_handlers_block_by_func (config, gimp_prop_scale_button_notify, button); g_object_set (config, param_spec->name, value, NULL); g_signal_handlers_unblock_by_func (config, gimp_prop_scale_button_notify, button); } static void gimp_prop_scale_button_notify (GObject *config, GParamSpec *param_spec, GtkWidget *button) { gdouble value; g_object_get (config, param_spec->name, &value, NULL); g_signal_handlers_block_by_func (button, gimp_prop_scale_button_callback, config); gtk_scale_button_set_value (GTK_SCALE_BUTTON (button), value); g_signal_handlers_unblock_by_func (button, gimp_prop_scale_button_callback, config); } /*************/ /* view */ /*************/ static void gimp_prop_view_drop (GtkWidget *menu, gint x, gint y, GimpViewable *viewable, gpointer data); static void gimp_prop_view_notify (GObject *config, GParamSpec *param_spec, GtkWidget *view); /** * gimp_prop_view_new: * @config: #GimpConfig object to which property is attached. * @context: a #Gimpcontext. * @property_name: Name of #GimpViewable property. * @size: Width and height of preview display. * * Creates a widget to display the value of a #GimpViewable property. * * Return value: A new #GimpView widget. * * Since GIMP 2.4 */ GtkWidget * gimp_prop_view_new (GObject *config, const gchar *property_name, GimpContext *context, gint size) { GParamSpec *param_spec; GtkWidget *view; GimpViewable *viewable; param_spec = check_param_spec_w (config, property_name, G_TYPE_PARAM_OBJECT, G_STRFUNC); if (! param_spec) return NULL; if (! g_type_is_a (param_spec->value_type, GIMP_TYPE_VIEWABLE)) { g_warning ("%s: property '%s' of %s is not a GimpViewable", G_STRFUNC, property_name, g_type_name (G_TYPE_FROM_INSTANCE (config))); return NULL; } view = gimp_view_new_by_types (context, GIMP_TYPE_VIEW, param_spec->value_type, size, 0, FALSE); if (! view) { g_warning ("%s: cannot create view for type '%s'", G_STRFUNC, g_type_name (param_spec->value_type)); return NULL; } g_object_get (config, property_name, &viewable, NULL); if (viewable) { gimp_view_set_viewable (GIMP_VIEW (view), viewable); g_object_unref (viewable); } set_param_spec (G_OBJECT (view), view, param_spec); gimp_dnd_viewable_dest_add (view, param_spec->value_type, gimp_prop_view_drop, config); connect_notify (config, property_name, G_CALLBACK (gimp_prop_view_notify), view); return view; } static void gimp_prop_view_drop (GtkWidget *view, gint x, gint y, GimpViewable *viewable, gpointer data) { GObject *config; GParamSpec *param_spec; param_spec = get_param_spec (G_OBJECT (view)); if (! param_spec) return; config = G_OBJECT (data); g_object_set (config, param_spec->name, viewable, NULL); } static void gimp_prop_view_notify (GObject *config, GParamSpec *param_spec, GtkWidget *view) { GimpViewable *viewable; g_object_get (config, param_spec->name, &viewable, NULL); gimp_view_set_viewable (GIMP_VIEW (view), viewable); if (viewable) g_object_unref (viewable); } /*********************** * number pair entry * ***********************/ typedef struct { GObject *config; const gchar *left_number_property; const gchar *right_number_property; const gchar *default_left_number_property; const gchar *default_right_number_property; const gchar *user_override_property; } GimpPropNumberPairEntryData; static void gimp_prop_number_pair_entry_data_free (GimpPropNumberPairEntryData *data) { g_slice_free (GimpPropNumberPairEntryData, data); } static void gimp_prop_number_pair_entry_config_notify (GObject *config, GParamSpec *param_spec, GtkEntry *entry); static void gimp_prop_number_pair_entry_number_pair_numbers_changed (GtkWidget *widget, GimpPropNumberPairEntryData *data); static void gimp_prop_number_pair_entry_number_pair_user_override_notify (GtkWidget *entry, GParamSpec *param_spec, GimpPropNumberPairEntryData *data); /** * gimp_prop_number_pair_entry_new: * @config: Object to which properties are attached. * @left_number_property: Name of double property for left number. * @right_number_property: Name of double property for right number. * @default_left_number_property: Name of double property for default left number. * @default_right_number_property: Name of double property for default right number. * @user_override_property: Name of boolean property for user override mode. * @connect_numbers_changed: %TRUE to connect to the widgets "numbers-changed" * signal, %FALSE to not connect. * @connect_ratio_changed: %TRUE to connect to the widgets "ratio-changed" * signal, %FALSE to not connect. * @separators: * @allow_simplification: * @min_valid_value: * @max_valid_value: What to pass to gimp_number_pair_entry_new (). * * Return value: A #GimpNumberPairEntry widget. */ GtkWidget * gimp_prop_number_pair_entry_new (GObject *config, const gchar *left_number_property, const gchar *right_number_property, const gchar *default_left_number_property, const gchar *default_right_number_property, const gchar *user_override_property, gboolean connect_numbers_changed, gboolean connect_ratio_changed, const gchar *separators, gboolean allow_simplification, gdouble min_valid_value, gdouble max_valid_value) { GimpPropNumberPairEntryData *data; GtkWidget *number_pair_entry; gdouble left_number; gdouble right_number; gdouble default_left_number; gdouble default_right_number; gboolean user_override; /* Setup config data */ data = g_slice_new (GimpPropNumberPairEntryData); data->config = config; data->left_number_property = left_number_property; data->right_number_property = right_number_property; data->default_left_number_property = default_left_number_property; data->default_right_number_property = default_right_number_property; data->user_override_property = user_override_property; /* Read current values of config properties */ g_object_get (config, left_number_property, &left_number, right_number_property, &right_number, default_left_number_property, &default_left_number, default_right_number_property, &default_right_number, user_override_property, &user_override, NULL); /* Create a GimpNumberPairEntry and setup with config property values */ number_pair_entry = gimp_number_pair_entry_new (separators, allow_simplification, min_valid_value, max_valid_value); g_object_set_data_full (G_OBJECT (number_pair_entry), "gimp-prop-number-pair-entry-data", data, (GDestroyNotify) gimp_prop_number_pair_entry_data_free); gtk_entry_set_width_chars (GTK_ENTRY (number_pair_entry), 7); gimp_number_pair_entry_set_user_override (GIMP_NUMBER_PAIR_ENTRY (number_pair_entry), user_override); gimp_number_pair_entry_set_values (GIMP_NUMBER_PAIR_ENTRY (number_pair_entry), left_number, right_number); gimp_number_pair_entry_set_default_values (GIMP_NUMBER_PAIR_ENTRY (number_pair_entry), default_left_number, default_right_number); /* Connect to GimpNumberPairEntry signals */ if (connect_ratio_changed) g_signal_connect (number_pair_entry, "ratio-changed", G_CALLBACK (gimp_prop_number_pair_entry_number_pair_numbers_changed), data); if (connect_numbers_changed) g_signal_connect (number_pair_entry, "numbers-changed", G_CALLBACK (gimp_prop_number_pair_entry_number_pair_numbers_changed), data); g_signal_connect (number_pair_entry, "notify::user-override", G_CALLBACK (gimp_prop_number_pair_entry_number_pair_user_override_notify), data); /* Connect to connfig object signals */ connect_notify (config, left_number_property, G_CALLBACK (gimp_prop_number_pair_entry_config_notify), number_pair_entry); connect_notify (config, right_number_property, G_CALLBACK (gimp_prop_number_pair_entry_config_notify), number_pair_entry); connect_notify (config, default_left_number_property, G_CALLBACK (gimp_prop_number_pair_entry_config_notify), number_pair_entry); connect_notify (config, default_right_number_property, G_CALLBACK (gimp_prop_number_pair_entry_config_notify), number_pair_entry); connect_notify (config, user_override_property, G_CALLBACK (gimp_prop_number_pair_entry_config_notify), number_pair_entry); /* Done */ return number_pair_entry; } static void gimp_prop_number_pair_entry_config_notify (GObject *config, GParamSpec *param_spec, GtkEntry *number_pair_entry) { GimpPropNumberPairEntryData *data = g_object_get_data (G_OBJECT (number_pair_entry), "gimp-prop-number-pair-entry-data"); g_return_if_fail (data != NULL); if (strcmp (param_spec->name, data->left_number_property) == 0 || strcmp (param_spec->name, data->right_number_property) == 0) { gdouble left_number; gdouble right_number; g_object_get (config, data->left_number_property, &left_number, data->right_number_property, &right_number, NULL); gimp_number_pair_entry_set_values (GIMP_NUMBER_PAIR_ENTRY (number_pair_entry), left_number, right_number); } else if (strcmp (param_spec->name, data->default_left_number_property) == 0 || strcmp (param_spec->name, data->default_right_number_property) == 0) { gdouble default_left_number; gdouble default_right_number; g_object_get (config, data->default_left_number_property, &default_left_number, data->default_right_number_property, &default_right_number, NULL); gimp_number_pair_entry_set_default_values (GIMP_NUMBER_PAIR_ENTRY (number_pair_entry), default_left_number, default_right_number); } else if (strcmp (param_spec->name, data->user_override_property) == 0) { gboolean user_override; g_object_get (config, data->user_override_property, &user_override, NULL); gimp_number_pair_entry_set_user_override (GIMP_NUMBER_PAIR_ENTRY (number_pair_entry), user_override); } } static void gimp_prop_number_pair_entry_number_pair_numbers_changed (GtkWidget *widget, GimpPropNumberPairEntryData *data) { gdouble left_number; gdouble right_number; gimp_number_pair_entry_get_values (GIMP_NUMBER_PAIR_ENTRY (widget), &left_number, &right_number); g_object_set (data->config, data->left_number_property, left_number, data->right_number_property, right_number, NULL); } static void gimp_prop_number_pair_entry_number_pair_user_override_notify (GtkWidget *entry, GParamSpec *param_spec, GimpPropNumberPairEntryData *data) { gboolean old_config_user_override; gboolean new_config_user_override; g_object_get (data->config, data->user_override_property, &old_config_user_override, NULL); new_config_user_override = gimp_number_pair_entry_get_user_override (GIMP_NUMBER_PAIR_ENTRY (entry)); /* Only set when property changed, to avoid deadlocks */ if (new_config_user_override != old_config_user_override) g_object_set (data->config, data->user_override_property, new_config_user_override, NULL); } /***********/ /* table */ /***********/ GtkWidget * gimp_prop_table_new (GObject *config, GType owner_type, GimpContext *context) { GtkWidget *table; GtkSizeGroup *size_group; GParamSpec **param_specs; guint n_param_specs; gint i; gint row = 0; g_return_val_if_fail (G_IS_OBJECT (config), NULL); g_return_val_if_fail (context == NULL || GIMP_IS_CONTEXT (context), NULL); param_specs = g_object_class_list_properties (G_OBJECT_GET_CLASS (config), &n_param_specs); size_group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL); table = gtk_table_new (3, 1, FALSE); gtk_table_set_col_spacings (GTK_TABLE (table), 4); gtk_table_set_row_spacings (GTK_TABLE (table), 2); for (i = 0; i < n_param_specs; i++) { GParamSpec *pspec = param_specs[i]; GtkWidget *widget = NULL; const gchar *label = NULL; /* ignore properties of parent classes of owner_type */ if (! g_type_is_a (pspec->owner_type, owner_type)) continue; if (G_IS_PARAM_SPEC_STRING (pspec)) { static GQuark multiline_quark = 0; if (! multiline_quark) multiline_quark = g_quark_from_static_string ("multiline"); if (GIMP_IS_PARAM_SPEC_CONFIG_PATH (pspec)) { widget = gimp_prop_file_chooser_button_new (config, pspec->name, g_param_spec_get_nick (pspec), GTK_FILE_CHOOSER_ACTION_OPEN); } else if (g_param_spec_get_qdata (pspec, multiline_quark)) { GtkTextBuffer *buffer; GtkWidget *view; buffer = gimp_prop_text_buffer_new (config, pspec->name, -1); view = gtk_text_view_new_with_buffer (buffer); widget = gtk_scrolled_window_new (NULL, NULL); gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (widget), GTK_SHADOW_IN); gtk_container_add (GTK_CONTAINER (widget), view); gtk_widget_show (view); } else { widget = gimp_prop_entry_new (config, pspec->name, -1); } label = g_param_spec_get_nick (pspec); } else if (G_IS_PARAM_SPEC_BOOLEAN (pspec)) { widget = gimp_prop_check_button_new (config, pspec->name, g_param_spec_get_nick (pspec)); } else if (G_IS_PARAM_SPEC_ENUM (pspec)) { widget = gimp_prop_enum_combo_box_new (config, pspec->name, 0, 0); label = g_param_spec_get_nick (pspec); } else if (G_IS_PARAM_SPEC_INT (pspec) || G_IS_PARAM_SPEC_UINT (pspec) || G_IS_PARAM_SPEC_FLOAT (pspec) || G_IS_PARAM_SPEC_DOUBLE (pspec)) { GtkObject *adj; gint digits = (G_IS_PARAM_SPEC_FLOAT (pspec) || G_IS_PARAM_SPEC_DOUBLE (pspec)) ? 2 : 0; adj = gimp_prop_scale_entry_new (config, pspec->name, GTK_TABLE (table), 0, row++, g_param_spec_get_nick (pspec), 1.0, 1.0, digits, FALSE, 0.0, 0.0); gtk_size_group_add_widget (size_group, GIMP_SCALE_ENTRY_SPINBUTTON (adj)); } else if (GIMP_IS_PARAM_SPEC_RGB (pspec)) { widget = gimp_prop_color_button_new (config, pspec->name, g_param_spec_get_nick (pspec), 128, 24, GIMP_COLOR_AREA_SMALL_CHECKS); gimp_color_panel_set_context (GIMP_COLOR_PANEL (widget), context); label = g_param_spec_get_nick (pspec); } else { g_warning ("%s: not supported: %s (%s)\n", G_STRFUNC, g_type_name (G_TYPE_FROM_INSTANCE (pspec)), pspec->name); } if (widget) gimp_table_attach_aligned (GTK_TABLE (table), 0, row++, label, 0.0, 0.5, widget, 2, FALSE); } g_object_unref (size_group); g_free (param_specs); return table; } /*******************************/ /* private utility functions */ /*******************************/ static GQuark gimp_prop_widgets_param_spec_quark (void) G_GNUC_CONST; #define PARAM_SPEC_QUARK (gimp_prop_widgets_param_spec_quark ()) static GQuark gimp_prop_widgets_param_spec_quark (void) { static GQuark param_spec_quark = 0; if (! param_spec_quark) param_spec_quark = g_quark_from_static_string ("gimp-config-param-spec"); return param_spec_quark; } static void set_param_spec (GObject *object, GtkWidget *widget, GParamSpec *param_spec) { if (object) { g_object_set_qdata (object, PARAM_SPEC_QUARK, param_spec); } if (widget) { const gchar *blurb = g_param_spec_get_blurb (param_spec); if (blurb) gimp_help_set_help_data (widget, gettext (blurb), NULL); } } static GParamSpec * get_param_spec (GObject *object) { return g_object_get_qdata (object, PARAM_SPEC_QUARK); } static GParamSpec * find_param_spec (GObject *object, const gchar *property_name, const gchar *strloc) { GParamSpec *param_spec; param_spec = g_object_class_find_property (G_OBJECT_GET_CLASS (object), property_name); if (! param_spec) g_warning ("%s: %s has no property named '%s'", strloc, g_type_name (G_TYPE_FROM_INSTANCE (object)), property_name); return param_spec; } static GParamSpec * check_param_spec (GObject *object, const gchar *property_name, GType type, const gchar *strloc) { GParamSpec *param_spec; param_spec = find_param_spec (object, property_name, strloc); if (param_spec && ! g_type_is_a (G_TYPE_FROM_INSTANCE (param_spec), type)) { g_warning ("%s: property '%s' of %s is not a %s", strloc, param_spec->name, g_type_name (param_spec->owner_type), g_type_name (type)); return NULL; } return param_spec; } static GParamSpec * check_param_spec_w (GObject *object, const gchar *property_name, GType type, const gchar *strloc) { GParamSpec *param_spec; param_spec = check_param_spec (object, property_name, type, strloc); if (param_spec && (param_spec->flags & G_PARAM_WRITABLE) == 0) { g_warning ("%s: property '%s' of %s is writable", strloc, param_spec->name, g_type_name (param_spec->owner_type)); return NULL; } return param_spec; } static void connect_notify (GObject *config, const gchar *property_name, GCallback callback, gpointer callback_data) { gchar *notify_name; notify_name = g_strconcat ("notify::", property_name, NULL); g_signal_connect_object (config, notify_name, callback, callback_data, 0); g_free (notify_name); }