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

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * e-table-header-item.c
 * Copyright 1999, 2000, 2001, Ximian, Inc.
 *
 * Authors:
 *   Chris Lahey <clahey@ximian.com>
 *   Miguel de Icaza (miguel@gnu.org)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License, version 2, as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

#include <config.h>

#include "e-table-header-item.h"

#include <string.h>
#include <gtk/gtksignal.h>
#include <gtk/gtkdnd.h>
#include <gtk/gtkimage.h>
#include <libgnomecanvas/gnome-canvas.h>
#include <libgnomecanvas/gnome-canvas-util.h>
#include <libgnomecanvas/gnome-canvas-polygon.h>
#include <libgnomecanvas/gnome-canvas-rect-ellipse.h>
#include <gdk-pixbuf/gdk-pixbuf.h>
#include <gdk/gdkkeysyms.h>
#include "gal/widgets/e-cursors.h"
#include "gal/util/e-i18n.h"
#include "gal/util/e-util.h"
#include "gal/util/e-xml-utils.h"
#include "gal/util/e-marshal.h"
#include "gal/widgets/e-canvas.h"
#include "gal/widgets/e-popup-menu.h"
#include "gal/widgets/e-gui-utils.h"
#include "e-table-header.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]))
#define d(x)

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 {
    PROP_0,
    PROP_TABLE_HEADER,
    PROP_FULL_HEADER,
    PROP_DND_CODE,
    PROP_TABLE_FONTSET,
    PROP_SORT_INFO,
    PROP_TABLE,
    PROP_TREE
};

enum {
    ET_SCROLL_UP = 1 << 0,
    ET_SCROLL_DOWN = 1 << 1,
    ET_SCROLL_LEFT = 1 << 2,
    ET_SCROLL_RIGHT = 1 << 3
};

static void scroll_off (ETableHeaderItem *ethi);
static void scroll_on (ETableHeaderItem *ethi, guint scroll_direction);

static void
ethi_dispose (GObject *object){
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (object);

    ethi_drop_table_header (ethi);

    scroll_off (ethi);

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

    if (ethi->sort_info) {
        if (ethi->sort_info_changed_id)
            g_signal_handler_disconnect (ethi->sort_info, ethi->sort_info_changed_id);
        if (ethi->group_info_changed_id)
            g_signal_handler_disconnect (ethi->sort_info, ethi->group_info_changed_id);
        g_object_unref (ethi->sort_info);
        ethi->sort_info = NULL;
    }

    if (ethi->full_header)
        g_object_unref (ethi->full_header);
    ethi->full_header = NULL;

    if (ethi->config)
        g_object_unref (ethi->config);
    ethi->config = NULL;
    
    if (G_OBJECT_CLASS (ethi_parent_class)->dispose)
        (*G_OBJECT_CLASS (ethi_parent_class)->dispose) (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,
                            GTK_WIDGET (GNOME_CANVAS_ITEM (ethi)->canvas));

        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;
#ifndef NO_WARNINGS
#warning FOO BAA
#endif
#if 0
            gnome_canvas_group_child_bounds (GNOME_CANVAS_GROUP (item->parent), item);
#endif
        }
    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;
    gdk_font_ref (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, const char *fontname)
{
    GdkFont *font = NULL;

    if (fontname != NULL)
        font = gdk_fontset_load (fontname);

    if (font == NULL) {
        font = gtk_style_get_font (GTK_WIDGET (GNOME_CANVAS_ITEM (ethi)->canvas)->style);
        gdk_font_ref (font);
    }
    
    ethi_font_set (ethi, font);
    gdk_font_unref (font);
}

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

    header = G_OBJECT (ethi->eth);
    g_signal_handler_disconnect (header, ethi->structure_change_id);
    g_signal_handler_disconnect (header, ethi->dimension_change_id);

    g_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;
    g_object_ref (ethi->eth);

    ethi->height = e_table_header_item_get_height (ethi);

    ethi->structure_change_id = g_signal_connect (
        header, "structure_change",
        G_CALLBACK (structure_changed), ethi);
    ethi->dimension_change_id = g_signal_connect (
        header, "dimension_change",
        G_CALLBACK (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_property (GObject *object,
           guint prop_id,
           const GValue *value,
           GParamSpec *pspec)
{
    GnomeCanvasItem *item;
    ETableHeaderItem *ethi;

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

    switch (prop_id){
    case PROP_TABLE_HEADER:
        ethi_drop_table_header (ethi);
        ethi_add_table_header (ethi, E_TABLE_HEADER(g_value_get_object (value)));
        break;

    case PROP_FULL_HEADER:
        if (ethi->full_header)
            g_object_unref(ethi->full_header);
        ethi->full_header = E_TABLE_HEADER(g_value_get_object (value));
        if (ethi->full_header)
            g_object_ref(ethi->full_header);
        break;

    case PROP_DND_CODE:
        g_free(ethi->dnd_code);
        ethi->dnd_code = g_strdup (g_value_get_string (value));
        break;

    case PROP_TABLE_FONTSET:
        ethi_font_load (ethi, g_value_get_string (value));
        break;

    case PROP_SORT_INFO:
        if (ethi->sort_info){
            if (ethi->sort_info_changed_id)
                g_signal_handler_disconnect (
                    ethi->sort_info,
                    ethi->sort_info_changed_id);

            if (ethi->group_info_changed_id)
                g_signal_handler_disconnect (
                    ethi->sort_info,
                    ethi->group_info_changed_id);
            g_object_unref (ethi->sort_info);
        }
        ethi->sort_info = g_value_get_object (value);
        g_object_ref (ethi->sort_info);
        ethi->sort_info_changed_id =
            g_signal_connect (
                ethi->sort_info, "sort_info_changed",
                G_CALLBACK (ethi_sort_info_changed), ethi);
        ethi->group_info_changed_id =
            g_signal_connect (
                ethi->sort_info, "group_info_changed",
                G_CALLBACK(ethi_sort_info_changed), ethi);
        break;
    case PROP_TABLE:
        if (g_value_get_object (value))
            ethi->table = E_TABLE(g_value_get_object (value));
        else
            ethi->table = NULL;
        break;
    case PROP_TREE:
        if (g_value_get_object (value))
            ethi->tree = E_TREE(g_value_get_object (value));
        else
            ethi->tree = NULL;
        break;
    }
    gnome_canvas_item_request_update(item);
}

static void
ethi_get_property (GObject *object,
           guint prop_id,
           GValue *value,
           GParamSpec *pspec)
{
    ETableHeaderItem *ethi;

    ethi = E_TABLE_HEADER_ITEM (object);

    switch (prop_id){
    case PROP_FULL_HEADER:
        g_value_set_object (value, ethi->full_header);
        break;
    case PROP_DND_CODE:
        g_value_set_string (value, g_strdup (ethi->dnd_code));
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        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;
    
    d(g_print ("%s:%d: x = %d, x1 = %d\n", __FUNCTION__, __LINE__, x, x1));

    x1 += ethi->group_indent_width;
    
    if (x < x1) {
        d(g_print ("%s:%d: Returning 0\n", __FUNCTION__, __LINE__));
        return 0;
    }

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

        if ((x >= x1) && (x <= x1 + ecol->width)) {
            d(g_print ("%s:%d: Returning %d\n", __FUNCTION__, __LINE__, col));
            return col;
        }

        x1 += ecol->width;
    }
    d(g_print ("%s:%d: Returning %d\n", __FUNCTION__, __LINE__, cols - 1));
    return cols - 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;

    x1 += ethi->group_indent_width;
    
    if (x < x1)
        return 0;

    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_colormap (gdk_rgb_get_cmap ());
    win = gtk_window_new (GTK_WINDOW_POPUP);

    pix = gtk_image_new_from_pixmap (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_colormap ();
    
    gdk_pixmap_unref (pixmap);
    gdk_bitmap_unref (bitmap);
    
    return win;
}

static void
ethi_add_drop_marker (ETableHeaderItem *ethi, int col, gboolean recreate)
{
    int rx, ry;
    int x;
    
    if (!recreate && 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);

    rx -= gtk_layout_get_hadjustment (GTK_LAYOUT (GNOME_CANVAS_ITEM (ethi)->canvas))->value;
    ry -= gtk_layout_get_vadjustment (GTK_LAYOUT (GNOME_CANVAS_ITEM (ethi)->canvas))->value;

    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 void
do_drag_motion(ETableHeaderItem *ethi,
           GdkDragContext *context,
           gint x,
           gint y,
           guint time,
           gboolean recreate)
{
    d(g_print("In do_drag_motion\n"));
    d(g_print("x = %d, y = %d, ethi->width = %d, ethi->height = %d\n", x, y, ethi->width, ethi->height));

    if ((x >= 0) && (x <= (ethi->width)) &&
        (y >= 0) && (y <= (ethi->height))){
        int col;
        d(g_print("In header\n"));
        
        col = ethi_find_col_by_x_nearest (ethi, x);

        if (ethi->drag_col != -1 && (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, recreate);
            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);
    }
}

static gboolean
scroll_timeout (gpointer data)
{
    ETableHeaderItem *ethi = data;
    int dx = 0;
    GtkAdjustment *h, *v;
    double value;

    if (ethi->scroll_direction & ET_SCROLL_RIGHT)
        dx += 20;
    if (ethi->scroll_direction & ET_SCROLL_LEFT)
        dx -= 20;

    h = GTK_LAYOUT(GNOME_CANVAS_ITEM (ethi)->canvas)->hadjustment;
    v = GTK_LAYOUT(GNOME_CANVAS_ITEM (ethi)->canvas)->vadjustment;

    value = h->value;

    gtk_adjustment_set_value(h, CLAMP(h->value + dx, h->lower, h->upper - h->page_size));

    if (h->value != value)
        do_drag_motion(ethi,
                   ethi->last_drop_context,
                   ethi->last_drop_x + h->value,
                   ethi->last_drop_y + v->value,
                   ethi->last_drop_time,
                   TRUE);

    return TRUE;
}

static void
scroll_on (ETableHeaderItem *ethi, guint scroll_direction)
{
    if (ethi->scroll_idle_id == 0 || scroll_direction != ethi->scroll_direction) {
        if (ethi->scroll_idle_id != 0)
            g_source_remove (ethi->scroll_idle_id);
        ethi->scroll_direction = scroll_direction;
        ethi->scroll_idle_id = g_timeout_add (100, scroll_timeout, ethi);
    }
}

static void
scroll_off (ETableHeaderItem *ethi)
{
    if (ethi->scroll_idle_id) {
        g_source_remove (ethi->scroll_idle_id);
        ethi->scroll_idle_id = 0;
    }
}

static void
context_destroyed (gpointer data)
{
    ETableHeaderItem *ethi = data;

    ethi->last_drop_x       = 0;
    ethi->last_drop_y       = 0;
    ethi->last_drop_time    = 0;
    ethi->last_drop_context = NULL;
    scroll_off (ethi);

    g_object_unref (ethi);
}

static void
context_connect (ETableHeaderItem *ethi, GdkDragContext *context)
{
    if (g_dataset_get_data (context, "e-table-header-item") == NULL) {
        g_object_ref (ethi);
        g_dataset_set_data_full (context, "e-table-header-item", ethi, context_destroyed);
    }
}

static gboolean
ethi_drag_motion (GtkWidget *widget, GdkDragContext *context,
          gint x, gint y, guint time,
          ETableHeaderItem *ethi)
{
    char *droptype, *headertype;
    guint direction = 0;

    gdk_drag_status (context, 0, time);

    droptype = gdk_atom_name (GDK_POINTER_TO_ATOM (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);

    d(g_print ("y = %d, widget->allocation.y = %d, GTK_LAYOUT (widget)->vadjustment->value = %f\n", y, widget->allocation.y, GTK_LAYOUT (widget)->vadjustment->value));

    if (x < 20)
        direction |= ET_SCROLL_LEFT;
    if (x > widget->allocation.width - 20)
        direction |= ET_SCROLL_RIGHT;

    ethi->last_drop_x = x;
    ethi->last_drop_y = y;
    ethi->last_drop_time = time;
    ethi->last_drop_context = context;
    context_connect (ethi, context);

    do_drag_motion (ethi,
            context,
            x + GTK_LAYOUT(widget)->hadjustment->value,
            y + GTK_LAYOUT(widget)->vadjustment->value,
            time,
            FALSE);

    if (direction != 0)
        scroll_on (ethi, direction);
    else
        scroll_off (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;
    scroll_off (ethi);
}

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;
    int column;
    int drop_col;
    int i;

    if (data->data) {
        count = e_table_header_count(ethi->eth);
        column = atoi(data->data);
        drop_col = ethi->drop_col;
        ethi->drop_col = -1;

        if (column >= 0) {
            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, FALSE);

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

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

    /*
     * 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 = g_signal_connect (item->canvas, "drag_motion",
                         G_CALLBACK (ethi_drag_motion), ethi);
    ethi->drag_leave_id = g_signal_connect (item->canvas, "drag_leave",
                        G_CALLBACK (ethi_drag_leave), ethi);
    ethi->drag_drop_id = g_signal_connect (item->canvas, "drag_drop",
                           G_CALLBACK (ethi_drag_drop), ethi);
    ethi->drag_data_received_id = g_signal_connect (item->canvas, "drag_data_received",
                            G_CALLBACK (ethi_drag_data_received), ethi);

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

}

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

    gdk_font_unref (ethi->font);

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

    g_signal_handler_disconnect (item->canvas, ethi->drag_end_id);
    g_signal_handler_disconnect (item->canvas, ethi->drag_data_get_id);

    gtk_drag_dest_unset (GTK_WIDGET (item->canvas));

    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, 
                         GINT_TO_POINTER (column.column),
                         GINT_TO_POINTER (column.ascending ?
                                  E_TABLE_COL_ARROW_DOWN : 
                                  E_TABLE_COL_ARROW_UP));
        }
        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, 
                         GINT_TO_POINTER (column.column),
                         GINT_TO_POINTER (column.ascending ?
                                  E_TABLE_COL_ARROW_DOWN : 
                                  E_TABLE_COL_ARROW_UP));
        }
    }

    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;

        if (x2 <= x1)
            continue;

        e_table_header_draw_button (drawable, ecol,
                        GTK_WIDGET (canvas)->style,
                        GTK_WIDGET_STATE (canvas),
                        GTK_WIDGET (canvas),
                        x1 - x, -y,
                        width, height,
                        x2 - x1, ethi->height,
                        (ETableColArrow) g_hash_table_lookup (
                            arrows, GINT_TO_POINTER (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 (return_col)
            *return_col = col;

        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 resizable = 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->resizable && 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->resizable) {
                    resizable = TRUE;
                    break;
                }
            }
        }
    }
    
    if (resizable)
        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, 
                GINT_TO_POINTER (column.column),
                GINT_TO_POINTER (column.ascending ?
                         E_TABLE_COL_ARROW_DOWN : 
                         E_TABLE_COL_ARROW_UP));
        }
        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, 
                GINT_TO_POINTER (column.column),
                GINT_TO_POINTER (column.ascending ?
                         E_TABLE_COL_ARROW_DOWN : 
                         E_TABLE_COL_ARROW_UP));
        }
    }

    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,
        GTK_WIDGET_STATE (widget),
        widget,
        0, 0,
        col_width, ethi->height,
        col_width, ethi->height,
        (ETableColArrow) g_hash_table_lookup (
            arrows, GINT_TO_POINTER (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;
        column.column = model_col;
        column.ascending =  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;
        column.column = model_col;
        column.ascending = 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();
    g_object_set(etfcd,
             "full_header", info->ethi->full_header,
             "header", info->ethi->eth,
             "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;

    g_signal_emit_by_name (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 (gpointer data, GObject *where_object_was)
{
    ETableHeaderItem *ethi = data;
    ethi->config = NULL;
}

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

    if (ethi->table)
        e_table_set_state (ethi->table, state);
    if (ethi->tree)
        e_tree_set_state (ethi->tree, state);
    g_free (state);

    gtk_dialog_set_response_sensitive (GTK_DIALOG (config->dialog_toplevel),
                       GTK_RESPONSE_APPLY, FALSE);
}

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

    if (ethi->config)
        e_table_config_raise (E_TABLE_CONFIG (ethi->config));
    else {
        if (ethi->table) {
            state = e_table_get_state_object(ethi->table);
            spec = ethi->table->spec;
        } else if (ethi->tree) {
            state = e_tree_get_state_object(ethi->tree);
            spec = e_tree_get_spec (ethi->tree);
        } else
            return;

        ethi->config = e_table_config_new (
                _("Customize Current View"),
                spec, state, NULL);
        g_object_weak_ref (G_OBJECT (ethi->config),
                   config_destroyed, ethi);
        g_signal_connect (
            ethi->config, "changed",
            G_CALLBACK (apply_changes), ethi);
    }
}

static void
free_popup_info (GtkWidget *w, EthiHeaderInfo *info)
{
    g_free (info);
}

/* 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 [] = {
    E_POPUP_ITEM (N_("Sort Ascending"),            G_CALLBACK(ethi_popup_sort_ascending),  2),
    E_POPUP_ITEM (N_("Sort Descending"),           G_CALLBACK(ethi_popup_sort_descending), 2),
    E_POPUP_ITEM (N_("Unsort"),                    G_CALLBACK(ethi_popup_unsort),          0),
    E_POPUP_SEPARATOR,
    E_POPUP_ITEM (N_("Group By This Field"),       G_CALLBACK(ethi_popup_group_field),     16),
    E_POPUP_ITEM (N_("Group By Box"),              G_CALLBACK(ethi_popup_group_box),       128),
    E_POPUP_SEPARATOR,
    E_POPUP_ITEM (N_("Remove This Column"),        G_CALLBACK(ethi_popup_remove_column),   8),
    E_POPUP_ITEM (N_("Add a Column..."),           G_CALLBACK(ethi_popup_field_chooser),   0),
    E_POPUP_SEPARATOR,
    E_POPUP_ITEM (N_("Alignment"),                 G_CALLBACK(ethi_popup_alignment),       128),
    E_POPUP_ITEM (N_("Best Fit"),                  G_CALLBACK(ethi_popup_best_fit),        2),
    E_POPUP_ITEM (N_("Format Columns..."),         G_CALLBACK(ethi_popup_format_columns),  128),
    E_POPUP_SEPARATOR,
    E_POPUP_ITEM (N_("Customize Current View..."), G_CALLBACK(ethi_popup_customize_view),  4),
    E_POPUP_TERMINATOR
};

static void
ethi_header_context_menu (ETableHeaderItem *ethi, GdkEventButton *event)
{
    EthiHeaderInfo *info = g_new(EthiHeaderInfo, 1);
    ETableCol *col;
    GtkMenu *popup;
    info->ethi = ethi;
    info->col = ethi_find_col_by_x (ethi, event->x);
    col = e_table_header_get_column (ethi->eth, info->col);

    popup = e_popup_menu_create_with_domain (ethi_context_menu,
                         1 +
                         (col->sortable ? 0 : 2) +
                         ((ethi->table || ethi->tree) ? 0 : 4) + 
                         ((e_table_header_count (ethi->eth) > 1) ? 0 : 8),
                         ((e_table_sort_info_get_can_group (ethi->sort_info)) ? 0 : 16) +
                         128, info, E_I18N_DOMAIN);
    g_object_ref (popup);
    gtk_object_sink (GTK_OBJECT (popup));
    g_signal_connect (popup, "selection-done",
              G_CALLBACK (free_popup_info), info);
    e_popup_menu (popup, (GdkEvent *) event);
}

static void
ethi_button_pressed (ETableHeaderItem *ethi, GdkEventButton *event)
{
    g_signal_emit (ethi,
               ethi_signals [BUTTON_PRESSED], 0, event);
}

static void
ethi_change_sort_state (ETableHeaderItem *ethi, ETableCol *col)
{
    int model_col;
    int length;
    int i;
    int found = FALSE;
    
    if (col == NULL)
        return;

    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;
        column.column = model_col;
        column.ascending = 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->resizable)
                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;
                is_pointer_on_division (ethi, x, &start, &col);
                ethi->selected_col = col;
                e_canvas_item_grab_focus (item, 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;
            g_signal_emit_by_name (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) {
            ETableCol *col;
        
            col = e_table_header_get_column (ethi->eth, ethi_find_col_by_x (ethi, e->button.x));
            ethi_change_sort_state (ethi, col);
        }
        
        if (needs_ungrab)
            gnome_canvas_item_ungrab (item, e->button.time);

        break;
    }
    case GDK_KEY_PRESS:
        if ((e->key.keyval == GDK_F10) && (e->key.state & GDK_SHIFT_MASK)) {
            EthiHeaderInfo *info = g_new(EthiHeaderInfo, 1);
            ETableCol *col;
            GtkMenu *popup;
 
            info->ethi = ethi;
            info->col = ethi->selected_col;
            col = e_table_header_get_column (ethi->eth, info->col);
            
            popup = e_popup_menu_create_with_domain (ethi_context_menu,
                                 1 +
                                 (col->sortable ? 0 : 2) +
                                 ((ethi->table || ethi->tree) ? 0 : 4) + 
                                 ((e_table_header_count (ethi->eth) > 1) ? 0 : 8),
                                 ((e_table_sort_info_get_can_group (ethi->sort_info)) ? 0 : 16) +
                                 128, info, E_I18N_DOMAIN);
            g_object_ref (popup);
            gtk_object_sink (GTK_OBJECT (popup));
            g_signal_connect (popup, "selection-done",
                      G_CALLBACK (free_popup_info), info);
            e_popup_menu (popup, NULL);
        } else if (e->key.keyval == GDK_space) {
            ETableCol *col;
            
            col = e_table_header_get_column (ethi->eth, ethi->selected_col);
            ethi_change_sort_state (ethi, col);
        } else if ((e->key.keyval == GDK_Right) || (e->key.keyval == GDK_KP_Right)) {
            ETableCol *col;

            if ((ethi->selected_col < 0) || (ethi->selected_col >= ethi->eth->col_count - 1))
                ethi->selected_col = 0;
            else 
                ethi->selected_col++;
            col = e_table_header_get_column (ethi->eth, ethi->selected_col);
            ethi_change_sort_state (ethi, col);
        } else if ((e->key.keyval == GDK_Left) || (e->key.keyval == GDK_KP_Left)) {
            ETableCol *col;

            if ((ethi->selected_col <= 0) || (ethi->selected_col >= ethi->eth->col_count))
                ethi->selected_col = ethi->eth->col_count - 1;
            else 
                ethi->selected_col--;
            col = e_table_header_get_column (ethi->eth, ethi->selected_col);
            ethi_change_sort_state (ethi, col);
        }
        break;
    
    default:
        return FALSE;
    }
    return TRUE;
}

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

    ethi_parent_class = g_type_class_ref (PARENT_OBJECT_TYPE);
    
    object_class->dispose = ethi_dispose;
    object_class->set_property = ethi_set_property;
    object_class->get_property = ethi_get_property;

    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;

    g_object_class_install_property (object_class, PROP_DND_CODE,
                     g_param_spec_string ("dnd_code",
                                  _("DnD code"),
                                  /*_( */"XXX blurb" /*)*/,
                                  NULL,
                                  G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_TABLE_FONTSET,
                     g_param_spec_string ("fontset",
                                  _("Fontset"),
                                  /*_( */"XXX blurb" /*)*/,
                                  NULL,
                                  G_PARAM_WRITABLE));

    g_object_class_install_property (object_class, PROP_FULL_HEADER,
                     g_param_spec_object ("full_header",
                                  _("Full Header"),
                                  /*_( */"XXX blurb" /*)*/,
                                  E_TABLE_HEADER_TYPE,
                                  G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_TABLE_HEADER,
                     g_param_spec_object ("ETableHeader",
                                  _("Header"),
                                  /*_( */"XXX blurb" /*)*/,
                                  E_TABLE_HEADER_TYPE,
                                  G_PARAM_WRITABLE));

    g_object_class_install_property (object_class, PROP_SORT_INFO,
                     g_param_spec_object ("sort_info",
                                  _("Sort Info"),
                                  /*_( */"XXX blurb" /*)*/,
                                  E_TABLE_SORT_INFO_TYPE,
                                  G_PARAM_WRITABLE));

    g_object_class_install_property (object_class, PROP_TABLE,
                     g_param_spec_object ("table",
                                  _("Table"),
                                  /*_( */"XXX blurb" /*)*/,
                                  E_TABLE_TYPE,
                                  G_PARAM_WRITABLE));

    g_object_class_install_property (object_class, PROP_TREE,
                     g_param_spec_object ("tree",
                                  _("Tree"),
                                  /*_( */"XXX blurb" /*)*/,
                                  E_TREE_TYPE,
                                  G_PARAM_WRITABLE));

    /*
     * 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] =
        g_signal_new ("button_pressed",
                  G_OBJECT_CLASS_TYPE (object_class),
                  G_SIGNAL_RUN_LAST,
                  G_STRUCT_OFFSET (ETableHeaderItemClass, button_pressed),
                  NULL, NULL,
                  e_marshal_NONE__BOXED,
                  G_TYPE_NONE, 1, GDK_TYPE_EVENT);
}

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;
    ethi->tree = NULL;

    ethi->selected_col = 0;
}

E_MAKE_TYPE (e_table_header_item,
         "ETableHeaderItem",
         ETableHeaderItem,
         ethi_class_init,
         ethi_init,
         PARENT_OBJECT_TYPE)