path: root/widgets/e-table/e-table-sorted-variable.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * E-table-sorted.c: Implements a table that sorts another table
 *
 * Author:
 *   Miguel de Icaza (miguel@gnu.org)
 *
 * (C) 1999 Helix Code, Inc.
 */
#include <config.h>
#include <stdlib.h>
#include <gtk/gtksignal.h>
#include <string.h>
#include "e-util/e-util.h"
#include "e-table-sorted-variable.h"

#define PARENT_TYPE E_TABLE_SUBSET_VARIABLE_TYPE

#define INCREMENT_AMOUNT 10

static ETableSubsetVariableClass *etsv_parent_class;

static void etsv_proxy_model_changed (ETableModel *etm, ETableSortedVariable *etsv);
static void etsv_proxy_model_row_changed (ETableModel *etm, int row, ETableSortedVariable *etsv);
static void etsv_proxy_model_cell_changed (ETableModel *etm, int col, int row, ETableSortedVariable *etsv);
static void etsv_add       (ETableSubsetVariable *etssv, gint                  row);

static void
etsv_destroy (GtkObject *object)
{
    ETableSortedVariable *etsv = E_TABLE_SORTED_VARIABLE (object);
    ETableSubset *etss = E_TABLE_SUBSET (object);

    gtk_signal_disconnect (GTK_OBJECT (etss->source),
                   etsv->table_model_changed_id);
    gtk_signal_disconnect (GTK_OBJECT (etss->source),
                   etsv->table_model_row_changed_id);
    gtk_signal_disconnect (GTK_OBJECT (etss->source),
                   etsv->table_model_cell_changed_id);

    etsv->table_model_changed_id = 0;
    etsv->table_model_row_changed_id = 0;
    etsv->table_model_cell_changed_id = 0;

    GTK_OBJECT_CLASS (etsv_parent_class)->destroy (object);
}

static void
etsv_class_init (GtkObjectClass *object_class)
{
    ETableSubsetVariableClass *etssv_class = E_TABLE_SUBSET_VARIABLE_CLASS(object_class);

    etsv_parent_class = gtk_type_class (PARENT_TYPE);

    object_class->destroy = etsv_destroy;

    etssv_class->add = etsv_add;
}

E_MAKE_TYPE(e_table_sorted_variable, "ETableSortedVariable", ETableSortedVariable, etsv_class_init, NULL, PARENT_TYPE);

static void
etsv_add       (ETableSubsetVariable *etssv,
        gint                  row)
{
    ETableModel *etm = E_TABLE_MODEL(etssv);
    ETableSubset *etss = E_TABLE_SUBSET(etssv);
    ETableSortedVariable *etsv = E_TABLE_SORTED_VARIABLE(etssv);
    int i;
    int col = etsv->sort_col;
    GCompareFunc comp = etsv->compare;
    gint ascending = etsv->ascending;

    void *val = e_table_model_value_at(etss->source, col, row);
    
    /* FIXME: binary search anyone? */
    for ( i = 0; i < etss->n_map; i++ ) {
        int comp_val = (*comp)(val, e_table_model_value_at(etss->source, col, etss->map_table[i]));
        if ( (ascending && comp_val < 0) || ((!ascending) && comp_val > 0) )
            break;
    }
    if ( etss->n_map + 1 > etssv->n_vals_allocated ) {
        etss->map_table = g_realloc(etss->map_table, (etssv->n_vals_allocated + INCREMENT_AMOUNT) * sizeof(int));
        etssv->n_vals_allocated += INCREMENT_AMOUNT;
    }
    if ( i < etss->n_map )
        memmove(etss->map_table + i + 1, etss->map_table + i, (etss->n_map - i) * sizeof(int));
    etss->map_table[i] = row;
    etss->n_map++;
    if ( !etm->frozen )
        e_table_model_changed(etm);
}

ETableModel *
e_table_sorted_variable_new (ETableModel *source, int col, int ascending, GCompareFunc compare)
{
    ETableSortedVariable *etsv = gtk_type_new (E_TABLE_SORTED_VARIABLE_TYPE);
    ETableSubsetVariable *etssv = E_TABLE_SUBSET_VARIABLE (etsv);

    if (e_table_subset_variable_construct (etssv, source) == NULL){
        gtk_object_destroy (GTK_OBJECT (etsv));
        return NULL;
    }
    
    etsv->sort_col = col;
    etsv->ascending = ascending;
    etsv->compare = compare;

    etsv->table_model_changed_id = gtk_signal_connect (GTK_OBJECT (source), "model_changed",
                               GTK_SIGNAL_FUNC (etsv_proxy_model_changed), etsv);
    etsv->table_model_row_changed_id = gtk_signal_connect (GTK_OBJECT (source), "model_row_changed",
                                   GTK_SIGNAL_FUNC (etsv_proxy_model_row_changed), etsv);
    etsv->table_model_cell_changed_id = gtk_signal_connect (GTK_OBJECT (source), "model_cell_changed",
                                GTK_SIGNAL_FUNC (etsv_proxy_model_cell_changed), etsv);
    
    return E_TABLE_MODEL(etsv);
}

static void
etsv_proxy_model_changed (ETableModel *etm, ETableSortedVariable *etsv)
{
    if ( !E_TABLE_MODEL(etsv)->frozen ) {
        /*      FIXME: do_resort(); */
    }
}

static void
etsv_proxy_model_row_changed (ETableModel *etm, int row, ETableSortedVariable *etsv)
{
    ETableSubsetVariable *etssv = E_TABLE_SUBSET_VARIABLE(etsv);
    if ( !E_TABLE_MODEL(etsv)->frozen ) {
        if(e_table_subset_variable_remove(etssv, row))
            e_table_subset_variable_add(etssv, row);
    }
}

static void
etsv_proxy_model_cell_changed (ETableModel *etm, int col, int row, ETableSortedVariable *etsv)
{
    ETableSubsetVariable *etssv = E_TABLE_SUBSET_VARIABLE(etsv);
    if ( !E_TABLE_MODEL(etsv)->frozen ) {
        if ( col == etsv->sort_col ) {
            if(e_table_subset_variable_remove(etssv, row))
                e_table_subset_variable_add(etssv, row);
        }
    }
}