From 13cabd9ef2c63cfd947f1f4604dd0a5eac165ecd Mon Sep 17 00:00:00 2001 From: Christopher James Lahey Date: Tue, 20 Mar 2001 23:18:47 +0000 Subject: Added these classes. 2001-03-20 Christopher James Lahey * e-table-memory-callbacks.c, e-table-memory-callbacks.h, e-table-memory.c, e-table-memory.h: Added these classes. * Makefile.am: Added e-table-memory-callbacks.c, e-table-memory-callbacks.h, e-table-memory.c, and e-table-memory.h. svn path=/trunk/; revision=8857 --- widgets/table/e-table-memory-callbacks.c | 254 +++++++++++++++++++++++++++++++ 1 file changed, 254 insertions(+) create mode 100644 widgets/table/e-table-memory-callbacks.c (limited to 'widgets/table/e-table-memory-callbacks.c') diff --git a/widgets/table/e-table-memory-callbacks.c b/widgets/table/e-table-memory-callbacks.c new file mode 100644 index 0000000000..c1089b5f28 --- /dev/null +++ b/widgets/table/e-table-memory-callbacks.c @@ -0,0 +1,254 @@ +/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */ +/* + * e-table-memory-callbacks.c: a simple table model implementation + * that uses function pointers to simplify the creation of new, exotic + * and colorful tables in no time. + * + * Author: + * Miguel de Icaza (miguel@gnu.org) + * + * (C) 1999, 2000 Ximian, Inc. + */ + +#include +#include "e-table-memory-callbacks.h" + +enum { + ARG_0, + ARG_APPEND_ROW, +}; + +#define PARENT_TYPE e_table_memory_get_type () + +static int +etmc_column_count (ETableModel *etm) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->col_count) + return etmc->col_count (etm, etmc->data); + else + return 0; +} + +static void * +etmc_value_at (ETableModel *etm, int col, int row) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->value_at) + return etmc->value_at (etm, col, row, etmc->data); + else + return NULL; +} + +static void +etmc_set_value_at (ETableModel *etm, int col, int row, const void *val) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->set_value_at) + etmc->set_value_at (etm, col, row, val, etmc->data); +} + +static gboolean +etmc_is_cell_editable (ETableModel *etm, int col, int row) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->is_cell_editable) + return etmc->is_cell_editable (etm, col, row, etmc->data); + else + return FALSE; +} + +/* The default for etmc_duplicate_value is to return the raw value. */ +static void * +etmc_duplicate_value (ETableModel *etm, int col, const void *value) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->duplicate_value) + return etmc->duplicate_value (etm, col, value, etmc->data); + else + return (void *)value; +} + +static void +etmc_free_value (ETableModel *etm, int col, void *value) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->free_value) + etmc->free_value (etm, col, value, etmc->data); +} + +static void * +etmc_initialize_value (ETableModel *etm, int col) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->initialize_value) + return etmc->initialize_value (etm, col, etmc->data); + else + return NULL; +} + +static gboolean +etmc_value_is_empty (ETableModel *etm, int col, const void *value) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->value_is_empty) + return etmc->value_is_empty (etm, col, value, etmc->data); + else + return FALSE; +} + +static char * +etmc_value_to_string (ETableModel *etm, int col, const void *value) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->value_to_string) + return etmc->value_to_string (etm, col, value, etmc->data); + else + return g_strdup (""); +} + +static void +etmc_append_row (ETableModel *etm, ETableModel *source, int row) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS(etm); + + if (etmc->append_row) + etmc->append_row (etm, source, row, etmc->data); +} + +static void +etmc_get_arg (GtkObject *o, GtkArg *arg, guint arg_id) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS (o); + + switch (arg_id){ + case ARG_APPEND_ROW: + GTK_VALUE_POINTER(*arg) = etmc->append_row; + break; + } +} + +static void +etmc_set_arg (GtkObject *o, GtkArg *arg, guint arg_id) +{ + ETableMemoryCalbacks *etmc = E_TABLE_MEMORY_CALLBACKS (o); + + switch (arg_id){ + case ARG_APPEND_ROW: + etmc->append_row = GTK_VALUE_POINTER(*arg); + break; + default: + arg->type = GTK_TYPE_INVALID; + } +} + +static void +e_table_memory_callbacks_class_init (GtkObjectClass *object_class) +{ + ETableModelClass *model_class = (ETableModelClass *) object_class; + + object_class->set_arg = etmc_set_arg; + object_class->get_arg = etmc_get_arg; + + model_class->column_count = etmc_column_count; + model_class->value_at = etmc_value_at; + model_class->set_value_at = etmc_set_value_at; + model_class->is_cell_editable = etmc_is_cell_editable; + model_class->duplicate_value = etmc_duplicate_value; + model_class->free_value = etmc_free_value; + model_class->initialize_value = etmc_initialize_value; + model_class->value_is_empty = etmc_value_is_empty; + model_class->value_to_string = etmc_value_to_string; + model_class->append_row = etmc_append_row; + + gtk_object_add_arg_type ("ETableMemoryCalbacks::append_row", GTK_TYPE_POINTER, + GTK_ARG_READWRITE, ARG_APPEND_ROW); +} + +GtkType +e_table_memory_callbacks_get_type (void) +{ + static GtkType type = 0; + + if (!type){ + GtkTypeInfo info = { + "ETableMemoryCalbacks", + sizeof (ETableMemoryCalbacks), + sizeof (ETableMemoryCalbacksClass), + (GtkClassInitFunc) e_table_memory_callbacks_class_init, + (GtkObjectInitFunc) NULL, + NULL, /* reserved 1 */ + NULL, /* reserved 2 */ + (GtkClassInitFunc) NULL + }; + + type = gtk_type_unique (PARENT_TYPE, &info); + } + + return type; +} + +/** + * e_table_memory_callbacks_new: + * @col_count: + * @value_at: + * @set_value_at: + * @is_cell_editable: + * @duplicate_value: + * @free_value: + * @initialize_value: + * @value_is_empty: + * @value_to_string: + * @data: closure pointer. + * + * This initializes a new ETableMemoryCalbacksModel object. ETableMemoryCalbacksModel is + * an implementaiton of the abstract class ETableModel. The ETableMemoryCalbacksModel + * is designed to allow people to easily create ETableModels without having + * to create a new GtkType derived from ETableModel every time they need one. + * + * Instead, ETableMemoryCalbacksModel uses a setup based in callback functions, every + * callback function signature mimics the signature of each ETableModel method + * and passes the extra @data pointer to each one of the method to provide them + * with any context they might want to use. + * + * Returns: An ETableMemoryCalbacksModel object (which is also an ETableModel + * object). + */ +ETableModel * +e_table_memory_callbacks_new (ETableMemoryCalbacksColumnCountFn col_count, + ETableMemoryCalbacksValueAtFn value_at, + ETableMemoryCalbacksSetValueAtFn set_value_at, + ETableMemoryCalbacksIsCellEditableFn is_cell_editable, + ETableMemoryCalbacksDuplicateValueFn duplicate_value, + ETableMemoryCalbacksFreeValueFn free_value, + ETableMemoryCalbacksInitializeValueFn initialize_value, + ETableMemoryCalbacksValueIsEmptyFn value_is_empty, + ETableMemoryCalbacksValueToStringFn value_to_string, + void *data) +{ + ETableMemoryCalbacks *et; + + et = gtk_type_new (e_table_memory_callbacks_get_type ()); + + et->col_count = col_count; + et->value_at = value_at; + et->set_value_at = set_value_at; + et->is_cell_editable = is_cell_editable; + et->duplicate_value = duplicate_value; + et->free_value = free_value; + et->initialize_value = initialize_value; + et->value_is_empty = value_is_empty; + et->value_to_string = value_to_string; + et->data = data; + + return (ETableModel *) et; + } -- cgit v1.2.3