/* gtkcelllayout.c * Copyright (C) 2003 Kristian Rietveld * * 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, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:gtkcelllayout * @Short_Description: An interface for packing cells * @Title: GtkCellLayout * * #GtkCellLayout is an interface to be implemented by all objects which * want to provide a #GtkTreeViewColumn-like API for packing cells, setting * attributes and data funcs. * * One of the notable features provided by implementations of GtkCellLayout * are attributes. Attributes let you set the properties * in flexible ways. They can just be set to constant values like regular * properties. But they can also be mapped to a column of the underlying * tree model with gtk_cell_layout_set_attributes(), which means that the value * of the attribute can change from cell to cell as they are rendered by the * cell renderer. Finally, it is possible to specify a function with * gtk_cell_layout_set_cell_data_func() that is called to determine the value * of the attribute for each cell that is rendered. * * * GtkCellLayouts as GtkBuildable * * Implementations of GtkCellLayout which also implement the GtkBuildable * interface (#GtkCellView, #GtkIconView, #GtkComboBox, #GtkComboBoxEntry, * #GtkEntryCompletion, #GtkTreeViewColumn) accept GtkCellRenderer objects * as <child> elements in UI definitions. They support a custom * <attributes> element for their children, which can contain * multiple <attribute> elements. Each <attribute> element has * a name attribute which specifies a property of the cell renderer; the * content of the element is the attribute value. * * * A UI definition fragment specifying attributes * * * * * 0 * * " * * ]]> * * * Furthermore for implementations of GtkCellLayout that use a #GtkCellArea * to lay out cells (all GtkCellLayouts in GTK+ use a GtkCellArea) * cell properties can also be defined * in the format by specifying the custom <cell-packing> attribute which * can contain multiple <property> elements defined in the normal way. * * A UI definition fragment specifying cell properties * * * * * True * False * * " * * ]]> * * * */ #include "config.h" #include #include #include #include "gtkcelllayout.h" #include "gtkbuilderprivate.h" #include "gtkintl.h" typedef GtkCellLayoutIface GtkCellLayoutInterface; G_DEFINE_INTERFACE (GtkCellLayout, gtk_cell_layout, G_TYPE_OBJECT); static void gtk_cell_layout_default_init (GtkCellLayoutInterface *iface) { } /** * gtk_cell_layout_pack_start: * @cell_layout: A #GtkCellLayout. * @cell: A #GtkCellRenderer. * @expand: %TRUE if @cell is to be given extra space allocated to @cell_layout. * * Packs the @cell into the beginning of @cell_layout. If @expand is %FALSE, * then the @cell is allocated no more space than it needs. Any unused space * is divided evenly between cells for which @expand is %TRUE. * * Note that reusing the same cell renderer is not supported. * * Since: 2.4 */ void gtk_cell_layout_pack_start (GtkCellLayout *cell_layout, GtkCellRenderer *cell, gboolean expand) { GtkCellLayoutIface *iface; GtkCellArea *area; g_return_if_fail (GTK_IS_CELL_LAYOUT (cell_layout)); g_return_if_fail (GTK_IS_CELL_RENDERER (cell)); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->pack_start) iface->pack_start (cell_layout, cell, expand); else { area = iface->get_area (cell_layout); if (area) gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (area), cell, expand); } } /** * gtk_cell_layout_pack_end: * @cell_layout: A #GtkCellLayout. * @cell: A #GtkCellRenderer. * @expand: %TRUE if @cell is to be given extra space allocated to @cell_layout. * * Adds the @cell to the end of @cell_layout. If @expand is %FALSE, then the * @cell is allocated no more space than it needs. Any unused space is * divided evenly between cells for which @expand is %TRUE. * * Note that reusing the same cell renderer is not supported. * * Since: 2.4 */ void gtk_cell_layout_pack_end (GtkCellLayout *cell_layout, GtkCellRenderer *cell, gboolean expand) { GtkCellLayoutIface *iface; GtkCellArea *area; g_return_if_fail (GTK_IS_CELL_LAYOUT (cell_layout)); g_return_if_fail (GTK_IS_CELL_RENDERER (cell)); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->pack_end) iface->pack_end (cell_layout, cell, expand); else { area = iface->get_area (cell_layout); if (area) gtk_cell_layout_pack_end (GTK_CELL_LAYOUT (area), cell, expand); } } /** * gtk_cell_layout_clear: * @cell_layout: A #GtkCellLayout. * * Unsets all the mappings on all renderers on @cell_layout and * removes all renderers from @cell_layout. * * Since: 2.4 */ void gtk_cell_layout_clear (GtkCellLayout *cell_layout) { GtkCellLayoutIface *iface; GtkCellArea *area; g_return_if_fail (GTK_IS_CELL_LAYOUT (cell_layout)); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->clear) iface->clear (cell_layout); else { area = iface->get_area (cell_layout); if (area) gtk_cell_layout_clear (GTK_CELL_LAYOUT (area)); } } static void gtk_cell_layout_set_attributesv (GtkCellLayout *cell_layout, GtkCellRenderer *cell, va_list args) { gchar *attribute; gint column; GtkCellLayoutIface *iface; GtkCellArea *area; attribute = va_arg (args, gchar *); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->get_area) area = iface->get_area (cell_layout); if (iface->clear_attributes) iface->clear_attributes (cell_layout, cell); else if (area) gtk_cell_layout_clear_attributes (GTK_CELL_LAYOUT (area), cell); while (attribute != NULL) { column = va_arg (args, gint); if (iface->add_attribute) iface->add_attribute (cell_layout, cell, attribute, column); else if (area) gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (area), cell, attribute, column); attribute = va_arg (args, gchar *); } } /** * gtk_cell_layout_set_attributes: * @cell_layout: A #GtkCellLayout. * @cell: A #GtkCellRenderer. * @Varargs: A %NULL-terminated list of attributes. * * Sets the attributes in list as the attributes of @cell_layout. The * attributes should be in attribute/column order, as in * gtk_cell_layout_add_attribute(). All existing attributes are removed, and * replaced with the new attributes. * * Since: 2.4 */ void gtk_cell_layout_set_attributes (GtkCellLayout *cell_layout, GtkCellRenderer *cell, ...) { va_list args; g_return_if_fail (GTK_IS_CELL_LAYOUT (cell_layout)); g_return_if_fail (GTK_IS_CELL_RENDERER (cell)); va_start (args, cell); gtk_cell_layout_set_attributesv (cell_layout, cell, args); va_end (args); } /** * gtk_cell_layout_add_attribute: * @cell_layout: A #GtkCellLayout. * @cell: A #GtkCellRenderer. * @attribute: An attribute on the renderer. * @column: The column position on the model to get the attribute from. * * Adds an attribute mapping to the list in @cell_layout. The @column is the * column of the model to get a value from, and the @attribute is the * parameter on @cell to be set from the value. So for example if column 2 * of the model contains strings, you could have the "text" attribute of a * #GtkCellRendererText get its values from column 2. * * Since: 2.4 */ void gtk_cell_layout_add_attribute (GtkCellLayout *cell_layout, GtkCellRenderer *cell, const gchar *attribute, gint column) { GtkCellLayoutIface *iface; GtkCellArea *area; g_return_if_fail (GTK_IS_CELL_LAYOUT (cell_layout)); g_return_if_fail (GTK_IS_CELL_RENDERER (cell)); g_return_if_fail (attribute != NULL); g_return_if_fail (column >= 0); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->add_attribute) iface->add_attribute (cell_layout, cell, attribute, column); else { area = iface->get_area (cell_layout); if (area) gtk_cell_layout_add_attribute (GTK_CELL_LAYOUT (area), cell, attribute, column); } } /** * gtk_cell_layout_set_cell_data_func: * @cell_layout: A #GtkCellLayout. * @cell: A #GtkCellRenderer. * @func: The #GtkCellLayoutDataFunc to use. * @func_data: The user data for @func. * @destroy: The destroy notification for @func_data. * * Sets the #GtkCellLayoutDataFunc to use for @cell_layout. This function * is used instead of the standard attributes mapping for setting the * column value, and should set the value of @cell_layout's cell renderer(s) * as appropriate. @func may be %NULL to remove and older one. * * Since: 2.4 */ void gtk_cell_layout_set_cell_data_func (GtkCellLayout *cell_layout, GtkCellRenderer *cell, GtkCellLayoutDataFunc func, gpointer func_data, GDestroyNotify destroy) { GtkCellLayoutIface *iface; GtkCellArea *area; g_return_if_fail (GTK_IS_CELL_LAYOUT (cell_layout)); g_return_if_fail (GTK_IS_CELL_RENDERER (cell)); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->set_cell_data_func) iface->set_cell_data_func (cell_layout, cell, func, func_data, destroy); else { area = iface->get_area (cell_layout); if (area) { /* Ensure that the correct proxy object is sent to 'func' */ if (GTK_CELL_LAYOUT (area) != cell_layout) _gtk_cell_area_set_cell_data_func_with_proxy (area, cell, (GFunc)func, func_data, destroy, cell_layout); else gtk_cell_layout_set_cell_data_func (GTK_CELL_LAYOUT (area), cell, func, func_data, destroy); } } } /** * gtk_cell_layout_clear_attributes: * @cell_layout: A #GtkCellLayout. * @cell: A #GtkCellRenderer to clear the attribute mapping on. * * Clears all existing attributes previously set with * gtk_cell_layout_set_attributes(). * * Since: 2.4 */ void gtk_cell_layout_clear_attributes (GtkCellLayout *cell_layout, GtkCellRenderer *cell) { GtkCellLayoutIface *iface; GtkCellArea *area; g_return_if_fail (GTK_IS_CELL_LAYOUT (cell_layout)); g_return_if_fail (GTK_IS_CELL_RENDERER (cell)); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->clear_attributes) iface->clear_attributes (cell_layout, cell); else { area = iface->get_area (cell_layout); if (area) gtk_cell_layout_clear_attributes (GTK_CELL_LAYOUT (area), cell); } } /** * gtk_cell_layout_reorder: * @cell_layout: A #GtkCellLayout. * @cell: A #GtkCellRenderer to reorder. * @position: New position to insert @cell at. * * Re-inserts @cell at @position. Note that @cell has already to be packed * into @cell_layout for this to function properly. * * Since: 2.4 */ void gtk_cell_layout_reorder (GtkCellLayout *cell_layout, GtkCellRenderer *cell, gint position) { GtkCellLayoutIface *iface; GtkCellArea *area; g_return_if_fail (GTK_IS_CELL_LAYOUT (cell_layout)); g_return_if_fail (GTK_IS_CELL_RENDERER (cell)); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->reorder) iface->reorder (cell_layout, cell, position); else { area = iface->get_area (cell_layout); if (area) gtk_cell_layout_reorder (GTK_CELL_LAYOUT (area), cell, position); } } /** * gtk_cell_layout_get_cells: * @cell_layout: a #GtkCellLayout * * Returns the cell renderers which have been added to @cell_layout. * * Return value: (element-type GtkCellRenderer) (transfer container): a list of cell renderers. The list, but not the * renderers has been newly allocated and should be freed with * g_list_free() when no longer needed. * * Since: 2.12 */ GList * gtk_cell_layout_get_cells (GtkCellLayout *cell_layout) { GtkCellLayoutIface *iface; GtkCellArea *area; g_return_val_if_fail (GTK_IS_CELL_LAYOUT (cell_layout), NULL); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->get_cells) return iface->get_cells (cell_layout); else { area = iface->get_area (cell_layout); if (area) return gtk_cell_layout_get_cells (GTK_CELL_LAYOUT (area)); } return NULL; } /** * gtk_cell_layout_get_area: * @cell_layout: a #GtkCellLayout * * Returns the underlying #GtkCellArea which might be @cell_layout if called on a #GtkCellArea or * might be %NULL if no #GtkCellArea is used by @cell_layout. * * Return value: (transfer none): a list of cell renderers. The list, but not the * renderers has been newly allocated and should be freed with * g_list_free() when no longer needed. * * Since: 3.0 */ GtkCellArea * gtk_cell_layout_get_area (GtkCellLayout *cell_layout) { GtkCellLayoutIface *iface; g_return_val_if_fail (GTK_IS_CELL_LAYOUT (cell_layout), NULL); iface = GTK_CELL_LAYOUT_GET_IFACE (cell_layout); if (iface->get_area) return iface->get_area (cell_layout); return NULL; } /* Attribute parsing */ typedef struct { GtkCellLayout *cell_layout; GtkCellRenderer *renderer; gchar *attr_name; } AttributesSubParserData; static void attributes_start_element (GMarkupParseContext *context, const gchar *element_name, const gchar **names, const gchar **values, gpointer user_data, GError **error) { AttributesSubParserData *parser_data = (AttributesSubParserData*)user_data; guint i; if (strcmp (element_name, "attribute") == 0) { for (i = 0; names[i]; i++) if (strcmp (names[i], "name") == 0) parser_data->attr_name = g_strdup (values[i]); } else if (strcmp (element_name, "attributes") == 0) return; else g_warning ("Unsupported tag for GtkCellLayout: %s\n", element_name); } static void attributes_text_element (GMarkupParseContext *context, const gchar *text, gsize text_len, gpointer user_data, GError **error) { AttributesSubParserData *parser_data = (AttributesSubParserData*)user_data; glong l; gchar *endptr; gchar *string; if (!parser_data->attr_name) return; string = g_strndup (text, text_len); errno = 0; l = g_ascii_strtoll (string, &endptr, 0); if (errno || endptr == string) { g_set_error (error, GTK_BUILDER_ERROR, GTK_BUILDER_ERROR_INVALID_VALUE, "Could not parse integer `%s'", string); g_free (string); return; } g_free (string); gtk_cell_layout_add_attribute (parser_data->cell_layout, parser_data->renderer, parser_data->attr_name, l); g_free (parser_data->attr_name); parser_data->attr_name = NULL; } static const GMarkupParser attributes_parser = { attributes_start_element, NULL, attributes_text_element, }; /* Cell packing parsing */ static void gtk_cell_layout_buildable_set_cell_property (GtkCellArea *area, GtkBuilder *builder, GtkCellRenderer *cell, gchar *name, const gchar *value) { GParamSpec *pspec; GValue gvalue = { 0, }; GError *error = NULL; pspec = gtk_cell_area_class_find_cell_property (GTK_CELL_AREA_GET_CLASS (area), name); if (!pspec) { g_warning ("%s does not have a property called %s", g_type_name (G_OBJECT_TYPE (area)), name); return; } if (!gtk_builder_value_from_string (builder, pspec, value, &gvalue, &error)) { g_warning ("Could not read property %s:%s with value %s of type %s: %s", g_type_name (G_OBJECT_TYPE (area)), name, value, g_type_name (G_PARAM_SPEC_VALUE_TYPE (pspec)), error->message); g_error_free (error); return; } gtk_cell_area_cell_set_property (area, cell, name, &gvalue); g_value_unset (&gvalue); } typedef struct { GtkBuilder *builder; GtkCellLayout *cell_layout; GtkCellRenderer *renderer; gchar *cell_prop_name; gchar *context; gboolean translatable; } CellPackingSubParserData; static void cell_packing_start_element (GMarkupParseContext *context, const gchar *element_name, const gchar **names, const gchar **values, gpointer user_data, GError **error) { CellPackingSubParserData *parser_data = (CellPackingSubParserData*)user_data; guint i; if (strcmp (element_name, "property") == 0) { for (i = 0; names[i]; i++) if (strcmp (names[i], "name") == 0) parser_data->cell_prop_name = g_strdup (values[i]); else if (strcmp (names[i], "translatable") == 0) { if (!_gtk_builder_boolean_from_string (values[i], &parser_data->translatable, error)) return; } else if (strcmp (names[i], "comments") == 0) ; /* for translators */ else if (strcmp (names[i], "context") == 0) parser_data->context = g_strdup (values[i]); else g_warning ("Unsupported attribute for GtkCellLayout Cell " "property: %s\n", names[i]); } else if (strcmp (element_name, "cell-packing") == 0) return; else g_warning ("Unsupported tag for GtkCellLayout: %s\n", element_name); } static void cell_packing_text_element (GMarkupParseContext *context, const gchar *text, gsize text_len, gpointer user_data, GError **error) { CellPackingSubParserData *parser_data = (CellPackingSubParserData*)user_data; GtkCellArea *area; gchar* value; if (!parser_data->cell_prop_name) return; if (parser_data->translatable && text_len) { const gchar* domain; domain = gtk_builder_get_translation_domain (parser_data->builder); value = _gtk_builder_parser_translate (domain, parser_data->context, text); } else { value = g_strdup (text); } area = gtk_cell_layout_get_area (parser_data->cell_layout); if (!area) { g_warning ("%s does not have an internal GtkCellArea class and cannot apply child cell properties", g_type_name (G_OBJECT_TYPE (parser_data->cell_layout))); return; } gtk_cell_layout_buildable_set_cell_property (area, parser_data->builder, parser_data->renderer, parser_data->cell_prop_name, value); g_free (parser_data->cell_prop_name); g_free (parser_data->context); g_free (value); parser_data->cell_prop_name = NULL; parser_data->context = NULL; parser_data->translatable = FALSE; } static const GMarkupParser cell_packing_parser = { cell_packing_start_element, NULL, cell_packing_text_element, }; gboolean _gtk_cell_layout_buildable_custom_tag_start (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const gchar *tagname, GMarkupParser *parser, gpointer *data) { AttributesSubParserData *attr_data; CellPackingSubParserData *packing_data; if (!child) return FALSE; if (strcmp (tagname, "attributes") == 0) { attr_data = g_slice_new0 (AttributesSubParserData); attr_data->cell_layout = GTK_CELL_LAYOUT (buildable); attr_data->renderer = GTK_CELL_RENDERER (child); attr_data->attr_name = NULL; *parser = attributes_parser; *data = attr_data; return TRUE; } else if (strcmp (tagname, "cell-packing") == 0) { packing_data = g_slice_new0 (CellPackingSubParserData); packing_data->builder = builder; packing_data->cell_layout = GTK_CELL_LAYOUT (buildable); packing_data->renderer = GTK_CELL_RENDERER (child); *parser = cell_packing_parser; *data = packing_data; return TRUE; } return FALSE; } gboolean _gtk_cell_layout_buildable_custom_tag_end (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const gchar *tagname, gpointer *data) { AttributesSubParserData *attr_data; if (strcmp (tagname, "attributes") == 0) { attr_data = (AttributesSubParserData*)data; g_assert (!attr_data->attr_name); g_slice_free (AttributesSubParserData, attr_data); return TRUE; } else if (strcmp (tagname, "cell-packing") == 0) { g_slice_free (CellPackingSubParserData, (gpointer)data); return TRUE; } return FALSE; } void _gtk_cell_layout_buildable_add_child (GtkBuildable *buildable, GtkBuilder *builder, GObject *child, const gchar *type) { g_return_if_fail (GTK_IS_CELL_LAYOUT (buildable)); g_return_if_fail (GTK_IS_CELL_RENDERER (child)); gtk_cell_layout_pack_start (GTK_CELL_LAYOUT (buildable), GTK_CELL_RENDERER (child), FALSE); }