path: root/widgets/e-table/e-table-model.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-table-model.c: a Table Model
 *
 * Author:
 *   Miguel de Icaza (miguel@gnu.org)
 *
 * (C) 1999 Helix Code, Inc.
 */
#include <config.h>
#include <gtk/gtksignal.h>
#include "e-table-model.h"

#define ETM_CLASS(e) ((ETableModelClass *)((GtkObject *)e)->klass)

#define PARENT_TYPE gtk_object_get_type ()
                      

static GtkObjectClass *e_table_model_parent_class;

enum {
    MODEL_CHANGED,
    MODEL_ROW_CHANGED,
    MODEL_CELL_CHANGED,
    MODEL_ROW_INSERTED,
    MODEL_ROW_DELETED,
    ROW_SELECTION,
    LAST_SIGNAL
};

static guint e_table_model_signals [LAST_SIGNAL] = { 0, };

int
e_table_model_column_count (ETableModel *e_table_model)
{
    g_return_val_if_fail (e_table_model != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), 0);

    return ETM_CLASS (e_table_model)->column_count (e_table_model);
}


int
e_table_model_row_count (ETableModel *e_table_model)
{
    g_return_val_if_fail (e_table_model != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), 0);

    return ETM_CLASS (e_table_model)->row_count (e_table_model);
}

void *
e_table_model_value_at (ETableModel *e_table_model, int col, int row)
{
    g_return_val_if_fail (e_table_model != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), NULL);

    return ETM_CLASS (e_table_model)->value_at (e_table_model, col, row);
}

void
e_table_model_set_value_at (ETableModel *e_table_model, int col, int row, const void *data)
{
    g_return_if_fail (e_table_model != NULL);
    g_return_if_fail (E_IS_TABLE_MODEL (e_table_model));

    ETM_CLASS (e_table_model)->set_value_at (e_table_model, col, row, data);

    gtk_signal_emit (GTK_OBJECT (e_table_model),
             e_table_model_signals [MODEL_ROW_CHANGED], row);
    gtk_signal_emit (GTK_OBJECT (e_table_model),
             e_table_model_signals [MODEL_CELL_CHANGED], col, row);

    /*
     * Notice that "model_changed" is not emitted
     */
}

gboolean
e_table_model_is_cell_editable (ETableModel *e_table_model, int col, int row)
{
    g_return_val_if_fail (e_table_model != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), FALSE);

    return ETM_CLASS (e_table_model)->is_cell_editable (e_table_model, col, row);
}

gint
e_table_model_append_row (ETableModel *e_table_model)
{
    g_return_val_if_fail (e_table_model != NULL, -1);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), -1);

    if (ETM_CLASS (e_table_model)->append_row)
        return ETM_CLASS (e_table_model)->append_row (e_table_model);
    else
        return -1;
}

void *
e_table_model_duplicate_value (ETableModel *e_table_model, int col, const void *value)
{
    g_return_val_if_fail (e_table_model != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), NULL);

    if (ETM_CLASS (e_table_model)->duplicate_value)
        return ETM_CLASS (e_table_model)->duplicate_value (e_table_model, col, value);
    else
        return NULL;
}

void
e_table_model_free_value (ETableModel *e_table_model, int col, void *value)
{
    g_return_if_fail (e_table_model != NULL);
    g_return_if_fail (E_IS_TABLE_MODEL (e_table_model));

    if (ETM_CLASS (e_table_model)->free_value)
        ETM_CLASS (e_table_model)->free_value (e_table_model, col, value);
}

void *
e_table_model_initialize_value (ETableModel *e_table_model, int col)
{
    g_return_val_if_fail (e_table_model != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), NULL);

    if (ETM_CLASS (e_table_model)->initialize_value)
        return ETM_CLASS (e_table_model)->initialize_value (e_table_model, col);
    else
        return NULL;
}

gboolean
e_table_model_value_is_empty (ETableModel *e_table_model, int col, const void *value)
{
    g_return_val_if_fail (e_table_model != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), FALSE);

    if (ETM_CLASS (e_table_model)->value_is_empty)
        return ETM_CLASS (e_table_model)->value_is_empty (e_table_model, col, value);
    else
        return FALSE;
}

char *
e_table_model_value_to_string (ETableModel *e_table_model, int col, const void *value)
{
    g_return_val_if_fail (e_table_model != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE_MODEL (e_table_model), NULL);

    if (ETM_CLASS (e_table_model)->value_to_string)
        return ETM_CLASS (e_table_model)->value_to_string (e_table_model, col, value);
    else
        return g_strdup("");
}

static void
e_table_model_destroy (GtkObject *object)
{
    if (e_table_model_parent_class->destroy)
        (*e_table_model_parent_class->destroy)(object);
}

static void
e_table_model_class_init (GtkObjectClass *object_class)
{
    ETableModelClass *klass = E_TABLE_MODEL_CLASS(object_class);
    e_table_model_parent_class = gtk_type_class (PARENT_TYPE);
    
    object_class->destroy = e_table_model_destroy;

    e_table_model_signals [MODEL_CHANGED] =
        gtk_signal_new ("model_changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableModelClass, model_changed),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);

    e_table_model_signals [MODEL_ROW_CHANGED] =
        gtk_signal_new ("model_row_changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableModelClass, model_row_changed),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1, GTK_TYPE_INT);

    e_table_model_signals [MODEL_CELL_CHANGED] =
        gtk_signal_new ("model_cell_changed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableModelClass, model_cell_changed),
                gtk_marshal_NONE__INT_INT,
                GTK_TYPE_NONE, 2, GTK_TYPE_INT, GTK_TYPE_INT);

    e_table_model_signals [MODEL_ROW_INSERTED] =
        gtk_signal_new ("model_row_inserted",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableModelClass, model_row_inserted),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1, GTK_TYPE_INT);

    e_table_model_signals [MODEL_ROW_DELETED] =
        gtk_signal_new ("model_row_deleted",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableModelClass, model_row_deleted),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1, GTK_TYPE_INT);

    gtk_object_class_add_signals (object_class, e_table_model_signals, LAST_SIGNAL);

    klass->column_count = NULL;     
    klass->row_count = NULL;        
    klass->value_at = NULL;         
    klass->set_value_at = NULL;     
    klass->is_cell_editable = NULL; 
    klass->append_row = NULL;

    klass->duplicate_value = NULL;  
    klass->free_value = NULL;       
    klass->initialize_value = NULL; 
    klass->value_is_empty = NULL;   
    klass->value_to_string = NULL;
    klass->model_changed = NULL;    
    klass->model_row_changed = NULL;
    klass->model_cell_changed = NULL;
    klass->model_row_inserted = NULL;
    klass->model_row_deleted = NULL;
}


guint
e_table_model_get_type (void)
{
  static guint type = 0;

  if (!type)
    {
      GtkTypeInfo info =
      {
    "ETableModel",
    sizeof (ETableModel),
    sizeof (ETableModelClass),
    (GtkClassInitFunc) e_table_model_class_init,
    NULL,
    /* reserved_1 */ NULL,
        /* reserved_2 */ NULL,
        (GtkClassInitFunc) NULL,
      };

      type = gtk_type_unique (PARENT_TYPE, &info);
    }

  return type;
}

void
e_table_model_changed (ETableModel *e_table_model)
{
    g_return_if_fail (e_table_model != NULL);
    g_return_if_fail (E_IS_TABLE_MODEL (e_table_model));
    
    gtk_signal_emit (GTK_OBJECT (e_table_model),
             e_table_model_signals [MODEL_CHANGED]);
}

void
e_table_model_row_changed (ETableModel *e_table_model, int row)
{
    g_return_if_fail (e_table_model != NULL);
    g_return_if_fail (E_IS_TABLE_MODEL (e_table_model));

    gtk_signal_emit (GTK_OBJECT (e_table_model),
             e_table_model_signals [MODEL_ROW_CHANGED], row);
}

void
e_table_model_cell_changed (ETableModel *e_table_model, int col, int row)
{
    g_return_if_fail (e_table_model != NULL);
    g_return_if_fail (E_IS_TABLE_MODEL (e_table_model));

    gtk_signal_emit (GTK_OBJECT (e_table_model),
             e_table_model_signals [MODEL_CELL_CHANGED], col, row);
}

void
e_table_model_row_inserted (ETableModel *e_table_model, int row)
{
    g_return_if_fail (e_table_model != NULL);
    g_return_if_fail (E_IS_TABLE_MODEL (e_table_model));

    gtk_signal_emit (GTK_OBJECT (e_table_model),
             e_table_model_signals [MODEL_ROW_INSERTED], row);
}

void
e_table_model_row_deleted (ETableModel *e_table_model, int row)
{
    g_return_if_fail (e_table_model != NULL);
    g_return_if_fail (E_IS_TABLE_MODEL (e_table_model));

    gtk_signal_emit (GTK_OBJECT (e_table_model),
             e_table_model_signals [MODEL_ROW_DELETED], row);
}