Added these classes.

2001-03-20  Christopher James Lahey  <clahey@ximian.com>

	* 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

1 files changed, 254 insertions, 0 deletions

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 <config.h>
+#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;
+ }