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

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * E-table-column-view.c: A canvas item based view of the ETableColumn.
 *
 * Author:
 *   Miguel de Icaza (miguel@gnu.org)
 *
 * Copyright 1999, 2000, 2001 Ximian, Inc.
 */
#include <config.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkdnd.h>
#include "gal/util/e-i18n.h"
#include <libgnomeui/gnome-canvas.h>
#include <libgnomeui/gnome-canvas-util.h>
#include <libgnomeui/gnome-canvas-polygon.h>
#include <libgnomeui/gnome-canvas-rect-ellipse.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include "gal/widgets/e-cursors.h"
#include "gal/util/e-xml-utils.h"
#include "gal/widgets/e-canvas.h"
#include "gal/widgets/e-popup-menu.h"
#include "e-table-header.h"
#include "e-table-header-item.h"
#include "e-table-header-utils.h"
#include "e-table-col-dnd.h"
#include "e-table-defines.h"
#include "e-table-field-chooser-dialog.h"
#include "e-table-config.h"
#include "e-table.h"

#include "add-col.xpm"
#include "remove-col.xpm"
#include "arrow-up.xpm"
#include "arrow-down.xpm"

enum {
    BUTTON_PRESSED,
    LAST_SIGNAL
};

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

#define ARROW_DOWN_HEIGHT 16
#define ARROW_PTR          7

/* Defines the tolerance for proximity of the column division to the cursor position */
#define TOLERANCE 4

#define ETHI_RESIZING(x) ((x)->resize_col != -1)

#define PARENT_OBJECT_TYPE gnome_canvas_item_get_type ()

#define ELEMENTS(x) (sizeof (x) / sizeof (x[0]))

static GnomeCanvasItemClass *ethi_parent_class;

static void ethi_drop_table_header (ETableHeaderItem *ethi);

/*
 * They display the arrows for the drop location.
 */
    
static GtkWidget *arrow_up, *arrow_down;

/*
 * DnD icons
 */
static GdkColormap *dnd_colormap;
static GdkPixmap *remove_col_pixmap, *remove_col_mask;
static GdkPixmap *add_col_pixmap, *add_col_mask;

enum {
    ARG_0,
    ARG_TABLE_HEADER,
    ARG_FULL_HEADER,
    ARG_DND_CODE,
    ARG_TABLE_FONTSET,
    ARG_SORT_INFO,
    ARG_TABLE,
};

static void
ethi_destroy (GtkObject *object){
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (object);

    ethi_drop_table_header (ethi);

    if (ethi->dnd_code) {
        g_free (ethi->dnd_code);
        ethi->dnd_code = NULL;
    }

    if (ethi->sort_info) {
        if (ethi->sort_info_changed_id)
            gtk_signal_disconnect (GTK_OBJECT(ethi->sort_info), ethi->sort_info_changed_id);
        if (ethi->group_info_changed_id)
            gtk_signal_disconnect (GTK_OBJECT(ethi->sort_info), ethi->group_info_changed_id);
        gtk_object_unref (GTK_OBJECT(ethi->sort_info));
        ethi->sort_info = NULL;
    }

    if (ethi->full_header)
        gtk_object_unref (GTK_OBJECT(ethi->full_header));

    if (ethi->config)
        gtk_object_destroy (GTK_OBJECT (ethi->config));
    
    if (GTK_OBJECT_CLASS (ethi_parent_class)->destroy)
        (*GTK_OBJECT_CLASS (ethi_parent_class)->destroy) (object);
}

static int
e_table_header_item_get_height (ETableHeaderItem *ethi)
{
    ETableHeader *eth;
    int numcols, col;
    int maxheight;
    GtkStyle *style;

    g_return_val_if_fail (ethi != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_HEADER_ITEM (ethi), 0);
       
    eth = ethi->eth;
    numcols = e_table_header_count (eth);

    maxheight = 0;

    style = GTK_WIDGET (GNOME_CANVAS_ITEM (ethi)->canvas)->style;

    for (col = 0; col < numcols; col++) {
        ETableCol *ecol = e_table_header_get_column (eth, col);
        int height;

        height = e_table_header_compute_height (ecol, style, ethi->font);

        if (height > maxheight)
            maxheight = height;
    }

    return maxheight;
}

static void
ethi_update (GnomeCanvasItem *item, double *affine, ArtSVP *clip_path, int flags)
{
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
    
    double   i2c [6];
    ArtPoint c1, c2, i1, i2;
    
    if (GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->update)
        (*GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->update)(item, affine, clip_path, flags);


    if (ethi->sort_info)
        ethi->group_indent_width = e_table_sort_info_grouping_get_count(ethi->sort_info) * GROUP_INDENT;
    else
        ethi->group_indent_width = 0;

    ethi->width = e_table_header_total_width (ethi->eth) + ethi->group_indent_width;

    i1.x = i1.y = 0;
    i2.x = ethi->width;
    i2.y = ethi->height;

    gnome_canvas_item_i2c_affine (item, i2c);
    art_affine_point (&c1, &i1, i2c);
    art_affine_point (&c2, &i2, i2c);

    if (item->x1 != c1.x ||
        item->y1 != c1.y ||
        item->x2 != c2.x ||
        item->y2 != c2.y)
        {
            gnome_canvas_request_redraw (item->canvas, item->x1, item->y1, item->x2, item->y2);
            item->x1 = c1.x;
            item->y1 = c1.y;
            item->x2 = c2.x;
            item->y2 = c2.y;

            gnome_canvas_group_child_bounds (GNOME_CANVAS_GROUP (item->parent), item);
        }
    gnome_canvas_request_redraw (item->canvas, item->x1, item->y1, item->x2, item->y2);
}

static void
ethi_font_set (ETableHeaderItem *ethi, GdkFont *font)
{
    if (ethi->font)
        gdk_font_unref (ethi->font);

    ethi->font = font;
    
    ethi->height = e_table_header_item_get_height (ethi);
    e_canvas_item_request_reflow(GNOME_CANVAS_ITEM(ethi));
}

static void
ethi_font_load (ETableHeaderItem *ethi, char *fontname)
{
    GdkFont *font;

    font = gdk_fontset_load (fontname);
    if (font == NULL)
        font = gdk_font_load ("-adobe-helvetica-medium-r-normal--*-120-*-*-*-*-iso8859-1");
    
    ethi_font_set (ethi, font);
}

static void
ethi_drop_table_header (ETableHeaderItem *ethi)
{
    GtkObject *header;
    
    if (!ethi->eth)
        return;

    header = GTK_OBJECT (ethi->eth);
    gtk_signal_disconnect (header, ethi->structure_change_id);
    gtk_signal_disconnect (header, ethi->dimension_change_id);

    gtk_object_unref (header);
    ethi->eth = NULL;
    ethi->width = 0;
}

static void 
structure_changed (ETableHeader *header, ETableHeaderItem *ethi)
{
    gnome_canvas_item_request_update(GNOME_CANVAS_ITEM(ethi));
}

static void
dimension_changed (ETableHeader *header, int col, ETableHeaderItem *ethi)
{
    gnome_canvas_item_request_update(GNOME_CANVAS_ITEM(ethi));
}

static void
ethi_add_table_header (ETableHeaderItem *ethi, ETableHeader *header)
{
    ethi->eth = header;
    gtk_object_ref (GTK_OBJECT (ethi->eth));

    ethi->height = e_table_header_item_get_height (ethi);

    ethi->structure_change_id = gtk_signal_connect (
        GTK_OBJECT (header), "structure_change",
        GTK_SIGNAL_FUNC(structure_changed), ethi);
    ethi->dimension_change_id = gtk_signal_connect (
        GTK_OBJECT (header), "dimension_change",
        GTK_SIGNAL_FUNC(dimension_changed), ethi);
    e_canvas_item_request_reflow(GNOME_CANVAS_ITEM(ethi));
    gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(ethi));
}

static void
ethi_sort_info_changed (ETableSortInfo *sort_info, ETableHeaderItem *ethi)
{
    gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(ethi));
}

static void
ethi_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
    GnomeCanvasItem *item;
    ETableHeaderItem *ethi;

    item = GNOME_CANVAS_ITEM (o);
    ethi = E_TABLE_HEADER_ITEM (o);

    switch (arg_id){
    case ARG_TABLE_HEADER:
        ethi_drop_table_header (ethi);
        ethi_add_table_header (ethi, E_TABLE_HEADER(GTK_VALUE_OBJECT (*arg)));
        break;

    case ARG_FULL_HEADER:
        if (ethi->full_header)
            gtk_object_unref(GTK_OBJECT(ethi->full_header));
        ethi->full_header = E_TABLE_HEADER(GTK_VALUE_OBJECT (*arg));
        if (ethi->full_header)
            gtk_object_ref(GTK_OBJECT(ethi->full_header));
        break;

    case ARG_DND_CODE:
        g_free(ethi->dnd_code);
        ethi->dnd_code = g_strdup (GTK_VALUE_STRING (*arg));
        break;

    case ARG_TABLE_FONTSET:
        ethi_font_load (ethi, GTK_VALUE_STRING (*arg));
        break;

    case ARG_SORT_INFO:
        if (ethi->sort_info){
            if (ethi->sort_info_changed_id)
                gtk_signal_disconnect (
                    GTK_OBJECT(ethi->sort_info),
                    ethi->sort_info_changed_id);

            if (ethi->group_info_changed_id)
                gtk_signal_disconnect (
                    GTK_OBJECT(ethi->sort_info),
                    ethi->group_info_changed_id);
            gtk_object_unref (GTK_OBJECT(ethi->sort_info));
        }
        ethi->sort_info = GTK_VALUE_POINTER (*arg);
        gtk_object_ref (GTK_OBJECT(ethi->sort_info));
        ethi->sort_info_changed_id =
            gtk_signal_connect (
                GTK_OBJECT(ethi->sort_info), "sort_info_changed",
                GTK_SIGNAL_FUNC(ethi_sort_info_changed), ethi);
        ethi->group_info_changed_id =
            gtk_signal_connect (
                GTK_OBJECT(ethi->sort_info), "group_info_changed",
                GTK_SIGNAL_FUNC(ethi_sort_info_changed), ethi);
        break;
    case ARG_TABLE:
        if (GTK_VALUE_OBJECT(*arg))
            ethi->table = E_TABLE(GTK_VALUE_OBJECT(*arg));
        else
            ethi->table = NULL;
        break;
    }
    gnome_canvas_item_request_update(item);
}

static void
ethi_get_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
    ETableHeaderItem *ethi;

    ethi = E_TABLE_HEADER_ITEM (o);

    switch (arg_id){
    case ARG_FULL_HEADER:
        GTK_VALUE_OBJECT (*arg) = GTK_OBJECT (ethi->full_header);
        break;
    case ARG_DND_CODE:
        GTK_VALUE_STRING (*arg) = g_strdup (ethi->dnd_code);
        break;
    default:
        arg->type = GTK_TYPE_INVALID;
        break;
    }
}

static int
ethi_find_col_by_x (ETableHeaderItem *ethi, int x)
{
    const int cols = e_table_header_count (ethi->eth);
    int x1 = 0;
    int col;

    if (x < x1)
        return -1;

    x1 += ethi->group_indent_width;
    
    for (col = 0; col < cols; col++){
        ETableCol *ecol = e_table_header_get_column (ethi->eth, col);

        if ((x >= x1) && (x <= x1 + ecol->width))
            return col;

        x1 += ecol->width;
    }
    return -1;
}

static int
ethi_find_col_by_x_nearest (ETableHeaderItem *ethi, int x)
{
    const int cols = e_table_header_count (ethi->eth);
    int x1 = 0;
    int col;

    if (x < x1)
        return -1;

    x1 += ethi->group_indent_width;
    
    for (col = 0; col < cols; col++){
        ETableCol *ecol = e_table_header_get_column (ethi->eth, col);

        x1 += (ecol->width / 2);

        if (x <= x1)
            return col;

        x1 += (ecol->width + 1) / 2;
    }
    return col;
}

static void
ethi_remove_drop_marker (ETableHeaderItem *ethi)
{
    if (ethi->drag_mark == -1)
        return;

    gtk_widget_hide (arrow_up);
    gtk_widget_hide (arrow_down);
    
    ethi->drag_mark = -1;
}

static GtkWidget *
make_shaped_window_from_xpm (const char **xpm)
{
    GdkPixbuf *pixbuf;
    GdkPixmap *pixmap;
    GdkBitmap *bitmap;
    GtkWidget *win, *pix;
    
    pixbuf = gdk_pixbuf_new_from_xpm_data (xpm);
    gdk_pixbuf_render_pixmap_and_mask (pixbuf, &pixmap, &bitmap, 128);
    gdk_pixbuf_unref (pixbuf);

    gtk_widget_push_visual (gdk_rgb_get_visual ());
    gtk_widget_push_colormap (gdk_rgb_get_cmap ());
    win = gtk_window_new (GTK_WINDOW_POPUP);
    pix = gtk_pixmap_new (pixmap, bitmap);
    gtk_widget_realize (win);
    gtk_container_add (GTK_CONTAINER (win), pix);
    gtk_widget_shape_combine_mask (win, bitmap, 0, 0);
    gtk_widget_pop_visual ();
    gtk_widget_pop_colormap ();
    
    gdk_pixmap_unref (pixmap);
    gdk_bitmap_unref (bitmap);
    
    return win;
}

static void
ethi_add_drop_marker (ETableHeaderItem *ethi, int col)
{
    int rx, ry;
    int x;
    
    if (ethi->drag_mark == col)
        return;

    ethi->drag_mark = col;

    x = e_table_header_col_diff (ethi->eth, 0, col);
    if (col > 0)
        x += ethi->group_indent_width;
    
    if (!arrow_up){
        arrow_up   = make_shaped_window_from_xpm (arrow_up_xpm);
        arrow_down = make_shaped_window_from_xpm (arrow_down_xpm);
    }

    gdk_window_get_origin (
        GTK_WIDGET (GNOME_CANVAS_ITEM (ethi)->canvas)->window,
        &rx, &ry);

    gtk_widget_set_uposition (arrow_down, rx + x - ARROW_PTR, ry - ARROW_DOWN_HEIGHT);
    gtk_widget_show_all (arrow_down);

    gtk_widget_set_uposition (arrow_up, rx + x - ARROW_PTR, ry + ethi->height);
    gtk_widget_show_all (arrow_up);
}

#define gray50_width    2
#define gray50_height   2
static char gray50_bits [] = {
  0x02, 0x01, };

static void
ethi_add_destroy_marker (ETableHeaderItem *ethi)
{
    double x1;
    
    if (ethi->remove_item)
        gtk_object_destroy (GTK_OBJECT (ethi->remove_item));

    if (!ethi->stipple)
        ethi->stipple = gdk_bitmap_create_from_data  (
            NULL, gray50_bits, gray50_width, gray50_height);
    
    x1 = (double) e_table_header_col_diff (ethi->eth, 0, ethi->drag_col);
    if (ethi->drag_col > 0)
        x1 += ethi->group_indent_width;
    
    ethi->remove_item = gnome_canvas_item_new (
        GNOME_CANVAS_GROUP (GNOME_CANVAS_ITEM (ethi)->canvas->root),
        gnome_canvas_rect_get_type (),
        "x1", x1 + 1,
        "y1", (double) 1,
        "x2", (double) x1 + e_table_header_col_diff (
            ethi->eth, ethi->drag_col, ethi->drag_col+1) - 2,

        "y2", (double) ethi->height - 2,
        "fill_color", "red",
        "fill_stipple", ethi->stipple,
        NULL);
}

static void
ethi_remove_destroy_marker (ETableHeaderItem *ethi)
{
    if (!ethi->remove_item)
        return;
    
    gtk_object_destroy (GTK_OBJECT (ethi->remove_item));
    ethi->remove_item = NULL;
}

#if 0
static gboolean
moved (ETableHeaderItem *ethi, guint col, guint model_col)
{
    if (col == -1)
        return TRUE;
    ecol = e_table_header_get_column (ethi->eth, col);
    if (ecol->col_idx == model_col)
        return FALSE;
    if (col > 0) {
        ecol = e_table_header_get_column (ethi->eth, col - 1);
        if (ecol->col_idx == model_col)
            return FALSE;
    }
    return TRUE;
}
#endif

static gboolean
ethi_drag_motion (GtkObject *canvas, GdkDragContext *context,
          gint x, gint y, guint time,
          ETableHeaderItem *ethi)
{
    char *droptype, *headertype;

    gdk_drag_status (context, 0, time);

    droptype = gdk_atom_name (GPOINTER_TO_INT (context->targets->data));
    headertype = g_strdup_printf ("%s-%s", TARGET_ETABLE_COL_TYPE,
                      ethi->dnd_code);

    if (strcmp (droptype, headertype) != 0) {
        g_free (headertype);
        return FALSE;
    }

    g_free (headertype);

    if ((x >= 0) && (x <= (ethi->width)) &&
        (y >= 0) && (y <= (ethi->height))){
        int col;
        
        col = ethi_find_col_by_x_nearest (ethi, x);

        if (col == ethi->drag_col || col == ethi->drag_col + 1) {
            if (ethi->drag_col != -1)
                ethi_remove_destroy_marker (ethi);
            
            ethi_remove_drop_marker (ethi);
            gdk_drag_status (context, context->suggested_action, time);
        } 
        else if (col != -1){
            if (ethi->drag_col != -1)
                ethi_remove_destroy_marker (ethi);

            ethi_add_drop_marker (ethi, col);
            gdk_drag_status (context, context->suggested_action, time);
        } else {
            ethi_remove_drop_marker (ethi);
            if (ethi->drag_col != -1)
                ethi_add_destroy_marker (ethi);
        }
    } else {
        ethi_remove_drop_marker (ethi);
        if (ethi->drag_col != -1)
            ethi_add_destroy_marker (ethi);
    }

    return TRUE;
}

static void
ethi_drag_end (GtkWidget *canvas, GdkDragContext *context, ETableHeaderItem *ethi)
{
    if (context->action == 0) {
        e_table_header_remove (ethi->eth, ethi->drag_col);
        gnome_canvas_item_request_update(GNOME_CANVAS_ITEM(ethi));
    }
    ethi_remove_drop_marker (ethi);
    ethi_remove_destroy_marker (ethi);
    ethi->drag_col = -1;
}

static void
ethi_drag_data_received (GtkWidget *canvas,
             GdkDragContext *drag_context,
             gint x,
             gint y,
             GtkSelectionData *data,
             guint info,
             guint time,
             ETableHeaderItem *ethi)
{
    int found = FALSE;
    int count = e_table_header_count(ethi->eth);
    int column = atoi(data->data);
    int drop_col = ethi->drop_col;
    int i;
    ethi->drop_col = -1;

    if (column < 0)
        return;
    for (i = 0; i < count; i++) {
        ETableCol *ecol = e_table_header_get_column (ethi->eth, i);
        if (ecol->col_idx == column) {
            e_table_header_move(ethi->eth, i, drop_col);
            found = TRUE;
            break;
        }
    }
    if (!found) {
        count = e_table_header_count(ethi->full_header);
        for (i = 0; i < count; i++) {
            ETableCol *ecol = e_table_header_get_column (ethi->full_header, i);
            if (ecol->col_idx == column) {
                e_table_header_add_column (ethi->eth, ecol, drop_col);
                break;
            }
        }
    }
    ethi_remove_drop_marker (ethi);
    gnome_canvas_item_request_update(GNOME_CANVAS_ITEM(ethi));
}

static void
ethi_drag_data_get (GtkWidget *canvas,
            GdkDragContext     *context,
            GtkSelectionData   *selection_data,
            guint               info,
            guint               time,
            ETableHeaderItem *ethi)
{
    if (ethi->drag_col != -1) {
        ETableCol *ecol = e_table_header_get_column (ethi->eth, ethi->drag_col);
        
        gchar *string = g_strdup_printf("%d", ecol->col_idx);
        gtk_selection_data_set(selection_data,
                       GDK_SELECTION_TYPE_STRING,
                       sizeof(string[0]),
                       string,
                       strlen(string));
        g_free(string);
    }
}

static gboolean
ethi_drag_drop (GtkWidget *canvas,
        GdkDragContext *context,
        gint x,
        gint y,
        guint time,
        ETableHeaderItem *ethi)
{
    gboolean successful = FALSE;

    if ((x >= 0) && (x <= (ethi->width)) &&
        (y >= 0) && (y <= (ethi->height))){
        int col;
        
        col = ethi_find_col_by_x_nearest (ethi, x);
        
        ethi_add_drop_marker (ethi, col);

        ethi->drop_col = col;
        
        if (col != -1) {
            char *target = g_strdup_printf ("%s-%s", TARGET_ETABLE_COL_TYPE, ethi->dnd_code);
            gtk_drag_get_data (canvas, context, gdk_atom_intern(target, FALSE), time);
            g_free (target);
        }
    }
    gtk_drag_finish (context, successful, successful, time);
    return successful;
}

static void
ethi_drag_leave (GtkWidget *widget, GdkDragContext *context, guint time, ETableHeaderItem *ethi)
{
    ethi_remove_drop_marker (ethi);
    if (ethi->drag_col != -1)
        ethi_add_destroy_marker (ethi);
}

static void
ethi_realize (GnomeCanvasItem *item)
{
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
    GdkWindow *window;
    GdkColor c;
    GtkTargetEntry  ethi_drop_types [] = {
        { TARGET_ETABLE_COL_TYPE, 0, TARGET_ETABLE_COL_HEADER },
    };

    
    if (GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)-> realize)
        (*GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->realize)(item);

    window = GTK_WIDGET (item->canvas)->window;

    ethi->gc = gdk_gc_new (window);
    gnome_canvas_get_color (item->canvas, "black", &c);
    gdk_gc_set_foreground (ethi->gc, &c);

    if (!ethi->font)
        ethi_font_set (ethi, GTK_WIDGET (item->canvas)->style->font);

    /*
     * Now, configure DnD
     */
    ethi_drop_types[0].target = g_strdup_printf("%s-%s", ethi_drop_types[0].target, ethi->dnd_code);
    gtk_drag_dest_set (GTK_WIDGET (item->canvas), 0,
               ethi_drop_types, ELEMENTS (ethi_drop_types),
               GDK_ACTION_MOVE);
    g_free(ethi_drop_types[0].target); 

    /* Drop signals */
    ethi->drag_motion_id = gtk_signal_connect        (GTK_OBJECT (item->canvas), "drag_motion",
                              GTK_SIGNAL_FUNC (ethi_drag_motion), ethi);
    ethi->drag_leave_id = gtk_signal_connect         (GTK_OBJECT (item->canvas), "drag_leave",
                              GTK_SIGNAL_FUNC (ethi_drag_leave), ethi);
    ethi->drag_drop_id = gtk_signal_connect          (GTK_OBJECT (item->canvas), "drag_drop",
                              GTK_SIGNAL_FUNC (ethi_drag_drop), ethi);
    ethi->drag_data_received_id = gtk_signal_connect (GTK_OBJECT (item->canvas), "drag_data_received",
                              GTK_SIGNAL_FUNC (ethi_drag_data_received), ethi);

    /* Drag signals */
    ethi->drag_end_id = gtk_signal_connect           (GTK_OBJECT (item->canvas), "drag_end",
                              GTK_SIGNAL_FUNC (ethi_drag_end), ethi);
    ethi->drag_data_get_id = gtk_signal_connect      (GTK_OBJECT (item->canvas), "drag_data_get",
                              GTK_SIGNAL_FUNC (ethi_drag_data_get), ethi);

}

static void
ethi_unrealize (GnomeCanvasItem *item)
{
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);

    gdk_gc_unref (ethi->gc);
    ethi->gc = NULL;

    gtk_signal_disconnect (GTK_OBJECT (item->canvas), ethi->drag_motion_id);
    gtk_signal_disconnect (GTK_OBJECT (item->canvas), ethi->drag_leave_id);
    gtk_signal_disconnect (GTK_OBJECT (item->canvas), ethi->drag_drop_id);
    gtk_signal_disconnect (GTK_OBJECT (item->canvas), ethi->drag_data_received_id);

    gtk_signal_disconnect (GTK_OBJECT (item->canvas), ethi->drag_end_id);
    gtk_signal_disconnect (GTK_OBJECT (item->canvas), ethi->drag_data_get_id);

    if (ethi->stipple){
        gdk_bitmap_unref (ethi->stipple);
        ethi->stipple = NULL;
    }
    
    if (GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->unrealize)
        (*GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->unrealize)(item);
}

static void
ethi_draw (GnomeCanvasItem *item, GdkDrawable *drawable, int x, int y, int width, int height)
{
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
    GnomeCanvas *canvas = item->canvas;
    const int cols = e_table_header_count (ethi->eth);
    int x1, x2;
    int col;
    GHashTable *arrows = g_hash_table_new (NULL, NULL);


    if (ethi->sort_info) {
        int length = e_table_sort_info_grouping_get_count(ethi->sort_info);
        int i;
        for (i = 0; i < length; i++) {
            ETableSortColumn column = e_table_sort_info_grouping_get_nth(ethi->sort_info, i);
            g_hash_table_insert (arrows, 
                         (gpointer) column.column,
                         (gpointer) (column.ascending ?
                             E_TABLE_COL_ARROW_UP : 
                             E_TABLE_COL_ARROW_DOWN));
        }
        length = e_table_sort_info_sorting_get_count(ethi->sort_info);
        for (i = 0; i < length; i++) {
            ETableSortColumn column = e_table_sort_info_sorting_get_nth(ethi->sort_info, i);
            g_hash_table_insert (arrows, 
                         (gpointer) column.column,
                         (gpointer) (column.ascending ?
                             E_TABLE_COL_ARROW_UP : 
                             E_TABLE_COL_ARROW_DOWN));
        }
    }

    ethi->width = e_table_header_total_width (ethi->eth) + ethi->group_indent_width;
    x1 = x2 = 0;
    x2 += ethi->group_indent_width;
    for (col = 0; col < cols; col++, x1 = x2){
        ETableCol *ecol = e_table_header_get_column (ethi->eth, col);
        int col_width;

        col_width = ecol->width;
                
        x2 += col_width;
        
        if (x1 > (x + width))
            break;

        if (x2 < x)
            continue;

        e_table_header_draw_button (drawable, ecol,
                        GTK_WIDGET (canvas)->style, ethi->font,
                        GTK_WIDGET_STATE (canvas),
                        GTK_WIDGET (canvas), ethi->gc,
                        x1 - x, -y,
                        width, height,
                        x2 - x1, ethi->height,
                        (ETableColArrow) g_hash_table_lookup (
                            arrows, (gpointer) ecol->col_idx));
    }

    g_hash_table_destroy (arrows);
}

static double
ethi_point (GnomeCanvasItem *item, double x, double y, int cx, int cy,
        GnomeCanvasItem **actual_item)
{
    *actual_item = item;
    return 0.0;
}

/*
 * is_pointer_on_division:
 *
 * Returns whether @pos is a column header division;  If @the_total is not NULL,
 * then the actual position is returned here.  If @return_ecol is not NULL,
 * then the ETableCol that actually contains this point is returned here
 */
static gboolean
is_pointer_on_division (ETableHeaderItem *ethi, int pos, int *the_total, int *return_col)
{
    const int cols = e_table_header_count (ethi->eth);
    int col, total;

    total = 0;
    for (col = 0; col < cols; col++){
        ETableCol *ecol = e_table_header_get_column (ethi->eth, col);

        if (col == 0)
            total += ethi->group_indent_width;
        
        total += ecol->width;

        if ((total - TOLERANCE < pos)&& (pos < total + TOLERANCE)){
            if (return_col)
                *return_col = col;
            if (the_total)
                *the_total = total;

            return TRUE;
        }

        if (total > pos + TOLERANCE)
            return FALSE;
    }

    return FALSE;
}

#define convert(c,sx,sy,x,y) gnome_canvas_w2c (c,sx,sy,x,y)

static void
set_cursor (ETableHeaderItem *ethi, int pos)
{
    int col;
    GtkWidget *canvas = GTK_WIDGET (GNOME_CANVAS_ITEM (ethi)->canvas);
    gboolean resizeable = FALSE;
        
    /* We might be invoked before we are realized */
    if (!canvas->window)
        return;

    if (is_pointer_on_division (ethi, pos, NULL, &col)) {
        int last_col = ethi->eth->col_count - 1;
        ETableCol *ecol = e_table_header_get_column (ethi->eth, col);

        /* Last column is not resizable */
        if (ecol->resizeable && col != last_col) {
            int c = col + 1;

            /* Column is not resizable if all columns after it
               are also not resizable */
            for (; c <= last_col; c++){
                ETableCol *ecol2;

                ecol2 = e_table_header_get_column (ethi->eth, c);
                if (ecol2->resizeable) {
                    resizeable = TRUE;
                    break;
                }
            }
        }
    }
    
    if (resizeable)
        e_cursor_set (canvas->window, E_CURSOR_SIZE_X);
    else
        gdk_window_set_cursor (canvas->window, NULL);
    /*      e_cursor_set (canvas->window, E_CURSOR_ARROW);*/
}

static void
ethi_end_resize (ETableHeaderItem *ethi)
{
    ethi->resize_col = -1;
    ethi->resize_guide = GINT_TO_POINTER (0);

    gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(ethi));
}

static gboolean
ethi_maybe_start_drag (ETableHeaderItem *ethi, GdkEventMotion *event)
{
    if (!ethi->maybe_drag)
        return FALSE;

    if (ethi->eth->col_count < 2) {
        ethi->maybe_drag = FALSE;
        return FALSE;
    }
        
    if (MAX (abs (ethi->click_x - event->x),
         abs (ethi->click_y - event->y)) <= 3)
        return FALSE;

    return TRUE;
}

static void
ethi_start_drag (ETableHeaderItem *ethi, GdkEvent *event)
{
    GtkWidget *widget = GTK_WIDGET (GNOME_CANVAS_ITEM (ethi)->canvas);
    GtkTargetList *list;
    GdkDragContext *context;
    ETableCol *ecol;
    int col_width;
    GdkPixmap *pixmap;
    int group_indent = 0;
    GHashTable *arrows = g_hash_table_new (NULL, NULL);

    GtkTargetEntry  ethi_drag_types [] = {
        { TARGET_ETABLE_COL_TYPE, 0, TARGET_ETABLE_COL_HEADER },
    };

    ethi->drag_col = ethi_find_col_by_x (ethi, event->motion.x);

    if (ethi->drag_col == -1)
        return;

    if (ethi->sort_info) {
        int length = e_table_sort_info_grouping_get_count(ethi->sort_info);
        int i;
        for (i = 0; i < length; i++) {
            ETableSortColumn column =
                e_table_sort_info_grouping_get_nth(
                    ethi->sort_info, i);
            group_indent ++;
            g_hash_table_insert (
                arrows, 
                (gpointer) column.column,
                (gpointer) (column.ascending ?
                        E_TABLE_COL_ARROW_UP : 
                        E_TABLE_COL_ARROW_DOWN));
        }
        length = e_table_sort_info_sorting_get_count(ethi->sort_info);
        for (i = 0; i < length; i++) {
            ETableSortColumn column =
                e_table_sort_info_sorting_get_nth (
                    ethi->sort_info, i);

            g_hash_table_insert (
                arrows, 
                (gpointer) column.column,
                (gpointer) (column.ascending ?
                        E_TABLE_COL_ARROW_UP : 
                        E_TABLE_COL_ARROW_DOWN));
        }
    }

    ethi_drag_types[0].target = g_strdup_printf(
        "%s-%s", ethi_drag_types[0].target, ethi->dnd_code);
    list = gtk_target_list_new (
        ethi_drag_types, ELEMENTS (ethi_drag_types));
    context = gtk_drag_begin (widget, list, GDK_ACTION_MOVE, 1, event);
    g_free(ethi_drag_types[0].target);

    ecol = e_table_header_get_column (ethi->eth, ethi->drag_col);
    col_width = ecol->width;
    pixmap = gdk_pixmap_new (widget->window, col_width, ethi->height, -1);

    e_table_header_draw_button (
        pixmap, ecol,
        widget->style, ethi->font,
        GTK_WIDGET_STATE (widget),
        widget, ethi->gc,
        0, 0,
        col_width, ethi->height,
        col_width, ethi->height,
        (ETableColArrow) g_hash_table_lookup (
            arrows, (gpointer) ecol->col_idx));
    gtk_drag_set_icon_pixmap (
        context,
        gdk_window_get_colormap (widget->window),
        pixmap,
        NULL,
        col_width / 2,
        ethi->height / 2);
    gdk_pixmap_unref (pixmap);

    ethi->maybe_drag = FALSE;
    g_hash_table_destroy (arrows);
}

typedef struct {
    ETableHeaderItem *ethi;
    int col;
} EthiHeaderInfo;

static void
ethi_popup_sort_ascending(GtkWidget *widget, EthiHeaderInfo *info)
{
    ETableCol *col;
    int model_col;
    int length;
    int i;
    int found = FALSE;
    ETableHeaderItem *ethi = info->ethi;

    col = e_table_header_get_column (ethi->eth, info->col);
    model_col = col->col_idx;

    length = e_table_sort_info_grouping_get_count(ethi->sort_info);
    for (i = 0; i < length; i++) {
        ETableSortColumn column = e_table_sort_info_grouping_get_nth (
            ethi->sort_info, i);

        if (model_col == column.column){
            column.ascending = 1;
            e_table_sort_info_grouping_set_nth (
                ethi->sort_info, i, column);
            found = 1;
            break;
        }
    }
    if (!found) {
        length = e_table_sort_info_sorting_get_count (
            ethi->sort_info);
        for (i = 0; i < length; i++) {
            ETableSortColumn column =
                e_table_sort_info_sorting_get_nth(
                    ethi->sort_info, i);
            if (model_col == column.column){
                column.ascending = 1;
                e_table_sort_info_sorting_set_nth (
                    ethi->sort_info, i, column);
                found = 1;
                break;
            }
        }
    }
    if (!found) {
        ETableSortColumn column = { model_col, 1 };
        length = e_table_sort_info_sorting_get_count(ethi->sort_info);
        if (length == 0)
            length++;
        e_table_sort_info_sorting_set_nth(ethi->sort_info, length - 1, column);
    }
}

static void
ethi_popup_sort_descending(GtkWidget *widget, EthiHeaderInfo *info)
{
    ETableCol *col;
    int model_col;
    int length;
    int i;
    int found = FALSE;
    ETableHeaderItem *ethi = info->ethi;

    col = e_table_header_get_column (ethi->eth, info->col);
    model_col = col->col_idx;

    length = e_table_sort_info_grouping_get_count(ethi->sort_info);
    for (i = 0; i < length; i++) {
        ETableSortColumn column = e_table_sort_info_grouping_get_nth(
            ethi->sort_info, i);
        if (model_col == column.column){
            column.ascending = 0;
            e_table_sort_info_grouping_set_nth(
                ethi->sort_info, i, column);
            found = 1;
            break;
        }
    }
    if (!found) {
        length = e_table_sort_info_sorting_get_count (ethi->sort_info);
        for (i = 0; i < length; i++) {
            ETableSortColumn column =
                e_table_sort_info_sorting_get_nth(
                    ethi->sort_info, i);

            if (model_col == column.column){
                column.ascending = 0;
                e_table_sort_info_sorting_set_nth (
                    ethi->sort_info, i, column);
                found = 1;
                break;
            }
        }
    }
    if (!found) {
        ETableSortColumn column = { model_col, 0 };
        length = e_table_sort_info_sorting_get_count (ethi->sort_info);
        if (length == 0)
            length++;
        e_table_sort_info_sorting_set_nth (
            ethi->sort_info, length - 1, column);
    }
}

static void
ethi_popup_unsort(GtkWidget *widget, EthiHeaderInfo *info)
{
    ETableHeaderItem *ethi = info->ethi;

    e_table_sort_info_grouping_truncate(ethi->sort_info, 0);
    e_table_sort_info_sorting_truncate(ethi->sort_info, 0);
}

static void
ethi_popup_group_field(GtkWidget *widget, EthiHeaderInfo *info)
{
    ETableCol *col;
    int model_col;
    ETableHeaderItem *ethi = info->ethi;
    ETableSortColumn column;

    col = e_table_header_get_column (ethi->eth, info->col);
    model_col = col->col_idx;

    column.column = model_col;
    column.ascending = 1;
    e_table_sort_info_grouping_set_nth(ethi->sort_info, 0, column);
    e_table_sort_info_grouping_truncate(ethi->sort_info, 1);
}

static void
ethi_popup_group_box(GtkWidget *widget, EthiHeaderInfo *info)
{
}

static void
ethi_popup_remove_column(GtkWidget *widget, EthiHeaderInfo *info)
{
    e_table_header_remove(info->ethi->eth, info->col);
}

static void
ethi_popup_field_chooser(GtkWidget *widget, EthiHeaderInfo *info)
{
    GtkWidget *etfcd = e_table_field_chooser_dialog_new();
    gtk_object_set(GTK_OBJECT(etfcd),
               "full_header", info->ethi->full_header,
               "dnd_code", info->ethi->dnd_code,
               NULL);
    gtk_widget_show(etfcd);
}

static void
ethi_popup_alignment(GtkWidget *widget, EthiHeaderInfo *info)
{
}

static void
ethi_popup_best_fit(GtkWidget *widget, EthiHeaderInfo *info)
{
    ETableHeaderItem *ethi = info->ethi;
    int width;

    gtk_signal_emit_by_name (GTK_OBJECT (ethi->eth),
                 "request_width",
                 info->col, &width);
    /* Add 10 to stop it from "..."ing */
    e_table_header_set_size (ethi->eth, info->col, width + 10);
    
    gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(ethi));

}

static void
ethi_popup_format_columns(GtkWidget *widget, EthiHeaderInfo *info)
{
}

static void
config_destroyed (GtkObject *object, ETableHeaderItem *ethi)
{
    ethi->config = NULL;
}

static void
apply_changes (ETableConfig *config, ETableHeaderItem *ethi)
{
    char *state = e_table_state_save_to_string (config->state);

    e_table_set_state (ethi->table, state);
    g_free (state);
}

static void
ethi_popup_customize_view(GtkWidget *widget, EthiHeaderInfo *info)
{
    ETableHeaderItem *ethi = info->ethi;
    ETableState *state;

    if (ethi->config)
        e_table_config_raise (E_TABLE_CONFIG (ethi->config));
    else {
        state = e_table_get_state_object(ethi->table);

        ethi->config = e_table_config_new (
            _("Configuring view: FIXME"),
            ethi->table->spec, state);
        gtk_signal_connect (
            GTK_OBJECT (ethi->config), "destroy",
            GTK_SIGNAL_FUNC (config_destroyed), ethi);
        gtk_signal_connect (
            GTK_OBJECT (ethi->config), "changed",
            GTK_SIGNAL_FUNC (apply_changes), ethi);
    }
}

/* Bit 1 is always disabled. */
/* Bit 2 is disabled if not "sortable". */
/* Bit 4 is disabled if we don't have a pointer to our table object. */
static EPopupMenu ethi_context_menu [] = {
    { N_("Sort Ascending"),            NULL, GTK_SIGNAL_FUNC(ethi_popup_sort_ascending),  NULL, 2},
    { N_("Sort Descending"),           NULL, GTK_SIGNAL_FUNC(ethi_popup_sort_descending), NULL, 2},
    { N_("Unsort"),                    NULL, GTK_SIGNAL_FUNC(ethi_popup_unsort),          NULL, 0},
    { "",                              NULL, GTK_SIGNAL_FUNC(NULL),                       NULL, 0},
    { N_("Group By This Field"),       NULL, GTK_SIGNAL_FUNC(ethi_popup_group_field),     NULL, 0},
    { N_("Group By Box"),              NULL, GTK_SIGNAL_FUNC(ethi_popup_group_box),       NULL, 1},
    { "",                              NULL, GTK_SIGNAL_FUNC(NULL),                       NULL, 1},
    { N_("Remove This Column"),        NULL, GTK_SIGNAL_FUNC(ethi_popup_remove_column),   NULL, 0},
    { N_("Add a Column..."),           NULL, GTK_SIGNAL_FUNC(ethi_popup_field_chooser),   NULL, 0},
    { "",                              NULL, GTK_SIGNAL_FUNC(NULL),                       NULL, 1},
    { N_("Alignment"),                 NULL, GTK_SIGNAL_FUNC(ethi_popup_alignment),       NULL, 1},
    { N_("Best Fit"),                  NULL, GTK_SIGNAL_FUNC(ethi_popup_best_fit),        NULL, 2},
    { N_("Format Columns..."),         NULL, GTK_SIGNAL_FUNC(ethi_popup_format_columns),  NULL, 1},
    { "",                              NULL, GTK_SIGNAL_FUNC(NULL),                       NULL, 1},
    { N_("Customize Current View..."), NULL, GTK_SIGNAL_FUNC(ethi_popup_customize_view),  NULL, 4},
    { NULL, NULL, NULL, NULL, 0 }
};

static void
ethi_header_context_menu (ETableHeaderItem *ethi, GdkEventButton *event)
{
    EthiHeaderInfo *info = g_new(EthiHeaderInfo, 1);
    ETableCol *col;
    info->ethi = ethi;
    info->col = ethi_find_col_by_x (ethi, event->x);
    col = e_table_header_get_column (ethi->eth, info->col);
    e_popup_menu_run (ethi_context_menu, (GdkEvent *) event,
              1 +
              (col->sortable ? 0 : 2) +
              (ethi->table ? 0 : 4), 0, info);
}

static void
ethi_button_pressed (ETableHeaderItem *ethi, GdkEventButton *event)
{
    gtk_signal_emit (GTK_OBJECT (ethi),
             ethi_signals [BUTTON_PRESSED], event);
}

static void
ethi_change_sort_state (ETableHeaderItem *ethi, gdouble x)
{
    ETableCol *col;
    int model_col;
    int length;
    int i;
    int found = FALSE;
    
    col = e_table_header_get_column (ethi->eth, ethi_find_col_by_x (ethi, x));
    model_col = col->col_idx;
    
    length = e_table_sort_info_grouping_get_count(ethi->sort_info);
    for (i = 0; i < length; i++) {
        ETableSortColumn column = e_table_sort_info_grouping_get_nth(ethi->sort_info, i);
        if (model_col == column.column){
            int ascending = column.ascending;
            ascending = ! ascending;
            column.ascending = ascending;
            e_table_sort_info_grouping_set_nth(ethi->sort_info, i, column);
            found = 1;
            break;
        }
    }
    
    if (!col->sortable)
        return;
    
    if (!found) {
        length = e_table_sort_info_sorting_get_count(ethi->sort_info);
        for (i = 0; i < length; i++) {
            ETableSortColumn column = e_table_sort_info_sorting_get_nth(ethi->sort_info, i);

            if (model_col == column.column){
                int ascending = column.ascending;
                
                if (ascending == 0){
                    /*
                     * This means the user has clicked twice
                     * already, lets kill sorting now.
                     */
                    e_table_sort_info_sorting_truncate (ethi->sort_info, i);
                } else {
                    ascending = !ascending;
                    column.ascending = ascending;
                    e_table_sort_info_sorting_set_nth(ethi->sort_info, i, column);
                }
                found = 1;
                break;
            }
        }
    }

    if (!found) {
        ETableSortColumn column = { model_col, 1 };
        length = e_table_sort_info_sorting_get_count(ethi->sort_info);
        if (length == 0)
            length++;
        e_table_sort_info_sorting_set_nth(ethi->sort_info, length - 1, column);
    }
}

/*
 * Handles the events on the ETableHeaderItem, particularly it handles resizing
 */
static int
ethi_event (GnomeCanvasItem *item, GdkEvent *e)
{
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
    GnomeCanvas *canvas = item->canvas;
    const gboolean resizing = ETHI_RESIZING (ethi);
    int x, y, start, col;
    int was_maybe_drag = 0;
    
    switch (e->type){
    case GDK_ENTER_NOTIFY:
        convert (canvas, e->crossing.x, e->crossing.y, &x, &y);
        set_cursor (ethi, x);
        break;

    case GDK_LEAVE_NOTIFY:
        gdk_window_set_cursor (GTK_WIDGET (canvas)->window, NULL);
        /*      e_cursor_set (GTK_WIDGET (canvas)->window, E_CURSOR_ARROW);*/
        break;
                
    case GDK_MOTION_NOTIFY:

        convert (canvas, e->motion.x, e->motion.y, &x, &y);
        if (resizing){
            int new_width;
            
            if (ethi->resize_guide == NULL){
                /* Quick hack until I actually bind the views */
                ethi->resize_guide = GINT_TO_POINTER (1);
                
                gnome_canvas_item_grab (item,
                            GDK_POINTER_MOTION_MASK |
                            GDK_BUTTON_RELEASE_MASK,
                            e_cursor_get (E_CURSOR_SIZE_X),
                            e->button.time);
            }

            new_width = x - ethi->resize_start_pos;

            e_table_header_set_size (ethi->eth, ethi->resize_col, new_width);

            gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(ethi));
        } else if (ethi_maybe_start_drag (ethi, &e->motion)){
            ethi_start_drag (ethi, e);
        } else
            set_cursor (ethi, x);
        break;
        
    case GDK_BUTTON_PRESS:
        if (e->button.button > 3)
            return FALSE;

        convert (canvas, e->button.x, e->button.y, &x, &y);
            
        if (is_pointer_on_division (ethi, x, &start, &col) && e->button.button == 1){
            ETableCol *ecol;
                
                /*
                 * Record the important bits.
                 *
                 * By setting resize_pos to a non -1 value,
                 * we know that we are being resized (used in the
                 * other event handlers).
                 */
            ecol = e_table_header_get_column (ethi->eth, col);
            
            if (!ecol->resizeable)
                break;
            ethi->resize_col = col;
            ethi->resize_start_pos = start - ecol->width;
            ethi->resize_min_width = ecol->min_width;
        } else {
            if (e->button.button == 1){
                ethi->click_x = e->button.x;
                ethi->click_y = e->button.y;
                ethi->maybe_drag = TRUE;
            } else if (e->button.button == 3){
                ethi_header_context_menu (ethi, &e->button);
            } else
                ethi_button_pressed (ethi, &e->button);
        }
        break;
        
    case GDK_2BUTTON_PRESS:
        if (!resizing)
            break;
        
        if (e->button.button != 1)
            break;
        else {
            int width = 0;
            gtk_signal_emit_by_name (GTK_OBJECT (ethi->eth),
                         "request_width",
                         (int)ethi->resize_col, &width);
            /* Add 10 to stop it from "..."ing */
            e_table_header_set_size (ethi->eth, ethi->resize_col, width + 10);

            gnome_canvas_item_request_update (GNOME_CANVAS_ITEM(ethi));
            ethi->maybe_drag = FALSE;
        }
        break;
        
    case GDK_BUTTON_RELEASE: {
        gboolean needs_ungrab = FALSE;
        
        was_maybe_drag = ethi->maybe_drag;
        
        ethi->maybe_drag = FALSE;

        if (ethi->resize_col != -1){
            needs_ungrab = (ethi->resize_guide != NULL);
            ethi_end_resize (ethi);
        } else if (was_maybe_drag && ethi->sort_info) 
            ethi_change_sort_state (ethi, e->button.x);
        
        if (needs_ungrab)
            gnome_canvas_item_ungrab (item, e->button.time);

        break;
    }
    
    default:
        return FALSE;
    }
    return TRUE;
}

static void
ethi_class_init (GtkObjectClass *object_class)
{
    GnomeCanvasItemClass *item_class = (GnomeCanvasItemClass *) object_class;

    ethi_parent_class = gtk_type_class (PARENT_OBJECT_TYPE);
    
    object_class->destroy = ethi_destroy;
    object_class->set_arg = ethi_set_arg;
    object_class->get_arg = ethi_get_arg;

    item_class->update      = ethi_update;
    item_class->realize     = ethi_realize;
    item_class->unrealize   = ethi_unrealize;
    item_class->draw        = ethi_draw;
    item_class->point       = ethi_point;
    item_class->event       = ethi_event;
    
    gtk_object_add_arg_type ("ETableHeaderItem::ETableHeader", GTK_TYPE_OBJECT,
                 GTK_ARG_WRITABLE, ARG_TABLE_HEADER);
    gtk_object_add_arg_type ("ETableHeaderItem::full_header", GTK_TYPE_OBJECT,
                 GTK_ARG_READWRITE, ARG_FULL_HEADER);
    gtk_object_add_arg_type ("ETableHeaderItem::dnd_code", GTK_TYPE_STRING,
                 GTK_ARG_READWRITE, ARG_DND_CODE);
    gtk_object_add_arg_type ("ETableHeaderItem::fontset", GTK_TYPE_STRING,
                 GTK_ARG_WRITABLE, ARG_TABLE_FONTSET);
    gtk_object_add_arg_type ("ETableHeaderItem::sort_info", GTK_TYPE_OBJECT,
                 GTK_ARG_WRITABLE, ARG_SORT_INFO);
    gtk_object_add_arg_type ("ETableHeaderItem::table", GTK_TYPE_OBJECT,
                 GTK_ARG_WRITABLE, ARG_TABLE);

    /*
     * Create our pixmaps for DnD
     */
    dnd_colormap = gtk_widget_get_default_colormap ();
    remove_col_pixmap = gdk_pixmap_colormap_create_from_xpm_d (
        NULL, dnd_colormap,
        &remove_col_mask, NULL, remove_col_xpm);

    add_col_pixmap = gdk_pixmap_colormap_create_from_xpm_d (
        NULL, dnd_colormap,
        &add_col_mask, NULL, add_col_xpm);

    ethi_signals [BUTTON_PRESSED] =
        gtk_signal_new ("button_pressed",
                GTK_RUN_LAST,
                object_class->type,
                GTK_SIGNAL_OFFSET (ETableHeaderItemClass, button_pressed),
                gtk_marshal_NONE__POINTER,
                GTK_TYPE_NONE, 1, GTK_TYPE_POINTER);
        
    gtk_object_class_add_signals (object_class, ethi_signals, LAST_SIGNAL);
}

static void
ethi_init (GnomeCanvasItem *item)
{
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);

    ethi->resize_col = -1;

    item->x1 = 0;
    item->y1 = 0;
    item->x2 = 0;
    item->y2 = 0;

    ethi->drag_col = -1;
    ethi->drag_mark = -1;
    
    ethi->sort_info = NULL;

    ethi->sort_info_changed_id = 0;
    ethi->group_info_changed_id = 0;

    ethi->group_indent_width = 0;
    ethi->table = NULL;
}

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

    if (!type){
        GtkTypeInfo info = {
            "ETableHeaderItem",
            sizeof (ETableHeaderItem),
            sizeof (ETableHeaderItemClass),
            (GtkClassInitFunc) ethi_class_init,
            (GtkObjectInitFunc) ethi_init,
            NULL, /* reserved 1 */
            NULL, /* reserved 2 */
            (GtkClassInitFunc) NULL
        };

        type = gtk_type_unique (PARENT_OBJECT_TYPE, &info);
    }

    return type;
}