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

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * E-table-col-head.c: TableColHead implementation
 *
 * Author:
 *   Miguel de Icaza (miguel@gnu.org)
 *
 * (C) 1999 Helix Code, Inc
 */
#include <config.h>
#include <string.h>
#include <gtk/gtkobject.h>
#include <gtk/gtksignal.h>
#include "e-table-header.h"

enum {
    STRUCTURE_CHANGE,
    DIMENSION_CHANGE,
    LAST_SIGNAL
};

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

static GtkObjectClass *e_table_header_parent_class;

static void
e_table_header_destroy (GtkObject *object)
{
    ETableHeader *eth = E_TABLE_HEADER (object);
    const int cols = eth->col_count;
    int i;
    
    /*
     * Destroy columns
     */
    for (i = cols - 1; i >= 0; i--){
        e_table_header_remove (eth, i);
    }
    
    if (e_table_header_parent_class->destroy)
        e_table_header_parent_class->destroy (object);
}

static void
e_table_header_class_init (GtkObjectClass *object_class)
{
    object_class->destroy = e_table_header_destroy;

    e_table_header_parent_class = (gtk_type_class (gtk_object_get_type ()));

    eth_signals [STRUCTURE_CHANGE] =
        gtk_signal_new ("structure_change",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableHeaderClass, structure_change),
                gtk_marshal_NONE__NONE,
                GTK_TYPE_NONE, 0);
    eth_signals [DIMENSION_CHANGE] = 
        gtk_signal_new ("dimension_change", 
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableHeaderClass, dimension_change),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1, GTK_TYPE_INT);

    gtk_object_class_add_signals (object_class, eth_signals, LAST_SIGNAL);
}

GtkType
e_table_header_get_type (void)
{
    static GtkType type = 0;

    if (!type){
        GtkTypeInfo info = {
            "ETableHeader",
            sizeof (ETableHeader),
            sizeof (ETableHeaderClass),
            (GtkClassInitFunc) e_table_header_class_init,
            (GtkObjectInitFunc) NULL,
            NULL, /* reserved 1 */
            NULL, /* reserved 2 */
            (GtkClassInitFunc) NULL
        };

        type = gtk_type_unique (gtk_object_get_type (), &info);
    }

    return type;
}

ETableHeader *
e_table_header_new (void)
{
    ETableHeader *eth;

    eth = gtk_type_new (e_table_header_get_type ());

    return eth;
}

static void
eth_do_insert (ETableHeader *eth, int pos, ETableCol *val)
{
    memmove (&eth->columns [pos+1], &eth->columns [pos],
        sizeof (ETableCol *) * (eth->col_count - pos));
    eth->columns [pos] = val;
    eth->col_count ++;
}

static void
eth_update_offsets (ETableHeader *eth)
{
    int i;
    int x = 0;
    
    for (i = 0; i < eth->col_count; i++){
        ETableCol *etc = eth->columns [i];

        etc->x = x;
        x += etc->width;
    }
}

void
e_table_header_add_column (ETableHeader *eth, ETableCol *tc, int pos)
{
    g_return_if_fail (eth != NULL);
    g_return_if_fail (E_IS_TABLE_HEADER (eth));
    g_return_if_fail (tc != NULL);
    g_return_if_fail (E_IS_TABLE_COL (tc));
    g_return_if_fail (pos >= -1 && pos <= eth->col_count);

    if (pos == -1)
        pos = eth->col_count;
    eth->columns = g_realloc (eth->columns, sizeof (ETableCol *) * (eth->col_count + 1));

    /*
     * We are the primary owners of the column
     */
    gtk_object_ref (GTK_OBJECT (tc));
    gtk_object_sink (GTK_OBJECT (tc));
    
    eth_do_insert (eth, pos, tc);
    eth_update_offsets (eth);

    gtk_signal_emit (GTK_OBJECT (eth), eth_signals [STRUCTURE_CHANGE]);
    gtk_signal_emit (GTK_OBJECT (eth), eth_signals [DIMENSION_CHANGE]);
}

ETableCol *
e_table_header_get_column (ETableHeader *eth, int column)
{
    g_return_val_if_fail (eth != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), NULL);

    if (column < 0)
        return NULL;

    if (column >= eth->col_count)
        return NULL;

    return eth->columns [column];
}

int
e_table_header_count (ETableHeader *eth)
{
    g_return_val_if_fail (eth != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), 0);

    return eth->col_count;
}

int
e_table_header_index (ETableHeader *eth, int col)
{
    g_return_val_if_fail (eth != NULL, -1);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), -1);
    g_return_val_if_fail (col < eth->col_count, -1);

    return eth->columns [col]->col_idx;
}

int
e_table_header_get_index_at (ETableHeader *eth, int x_offset)
{
    int i, total;
    
    g_return_val_if_fail (eth != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), 0);

    total = 0;
    for (i = 0; i < eth->col_count; i++){
        total += eth->columns [i]->width;

        if (x_offset < total)
            return i;
    }

    return -1;
}

ETableCol **
e_table_header_get_columns (ETableHeader *eth)
{
    ETableCol **ret;
    
    g_return_val_if_fail (eth != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), 0);

    ret = g_new (ETableCol *, eth->col_count + 1);
    memcpy (ret, eth->columns, sizeof (ETableCol *) * eth->col_count);
    ret [eth->col_count] = NULL;

    return ret;
}

gboolean
e_table_header_selection_ok (ETableHeader *eth)
{
    g_return_val_if_fail (eth != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), FALSE);

    return eth->selectable;
}

int
e_table_header_get_selected (ETableHeader *eth)
{
    int i;
    int selected = 0;
    
    g_return_val_if_fail (eth != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), 0);

    for (i = 0; i < eth->col_count; i++){
        if (eth->columns [i]->selected)
            selected++;
    }

    return selected;
}

int
e_table_header_total_width (ETableHeader *eth)
{
    int total, i;
    
    g_return_val_if_fail (eth != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), 0);

    total = 0;
    for (i = 0; i < eth->col_count; i++)
        total += eth->columns [i]->width;

    return total;
}

static void
eth_do_remove (ETableHeader *eth, int idx, gboolean do_unref)
{
    if (do_unref)
        gtk_object_unref (GTK_OBJECT (eth->columns [idx]));
    
    memmove (&eth->columns [idx], &eth->columns [idx+1],
        sizeof (ETableCol *) * eth->col_count - idx);
    eth->col_count--;
}

void
e_table_header_move (ETableHeader *eth, int source_index, int target_index)
{
    ETableCol *old;
    
    g_return_if_fail (eth != NULL);
    g_return_if_fail (E_IS_TABLE_HEADER (eth));
    g_return_if_fail (source_index >= 0);
    g_return_if_fail (target_index >= 0);
    g_return_if_fail (source_index < eth->col_count);
    g_return_if_fail (target_index < eth->col_count);

    old = eth->columns [source_index];
    eth_do_remove (eth, source_index, FALSE);
    eth_do_insert (eth, target_index, old);
    eth_update_offsets (eth);
    
    gtk_signal_emit (GTK_OBJECT (eth), eth_signals [STRUCTURE_CHANGE]);
    gtk_signal_emit (GTK_OBJECT (eth), eth_signals [DIMENSION_CHANGE]);
}

void
e_table_header_remove (ETableHeader *eth, int idx)
{
    g_return_if_fail (eth != NULL);
    g_return_if_fail (E_IS_TABLE_HEADER (eth));
    g_return_if_fail (idx >= 0);
    g_return_if_fail (idx < eth->col_count);

    eth_do_remove (eth, idx, TRUE);
    gtk_signal_emit (GTK_OBJECT (eth), eth_signals [STRUCTURE_CHANGE]);
    gtk_signal_emit (GTK_OBJECT (eth), eth_signals [DIMENSION_CHANGE]);
}

void
e_table_header_set_selection (ETableHeader *eth, gboolean allow_selection)
{
}

void
e_table_header_set_size (ETableHeader *eth, int idx, int size)
{
    g_return_if_fail (eth != NULL);
    g_return_if_fail (E_IS_TABLE_HEADER (eth));
    g_return_if_fail (idx >= 0);
    g_return_if_fail (idx < eth->col_count);
    g_return_if_fail (size > 0);

    eth->columns [idx]->width = size;
    gtk_signal_emit (GTK_OBJECT (eth), eth_signals [DIMENSION_CHANGE], idx);
}

int
e_table_header_col_diff (ETableHeader *eth, int start_col, int end_col)
{
    int total, col;
    
    g_return_val_if_fail (eth != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_HEADER (eth), 0);

    {
        if ( start_col < 0 )
            start_col = 0;
        if ( end_col > eth->col_count )
            end_col = eth->col_count - 1;
        
        total = 0;
        for (col = start_col; col < end_col; col++){
            
            total += eth->columns [col]->width;
        }
    }

    return total;
}