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

/*
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation.
 *
 * This program 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 General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, see <http://www.gnu.org/licenses/>.
 *
 *
 * Authors:
 *      Chris Lahey <clahey@ximian.com>
 *      Miguel de Icaza <miguel@gnu.org>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

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

#include <string.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <gdk/gdkkeysyms.h>
#include <gdk-pixbuf/gdk-pixbuf.h>

#include <libgnomecanvas/libgnomecanvas.h>

#include "e-canvas.h"
#include "e-popup-menu.h"
#include "e-table-col-dnd.h"
#include "e-table-config.h"
#include "e-table-defines.h"
#include "e-table-field-chooser-dialog.h"
#include "e-table-header-utils.h"
#include "e-table-header.h"
#include "e-table.h"
#include "e-xml-utils.h"

#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 ethi_get_type e_table_header_item_get_type
G_DEFINE_TYPE (ETableHeaderItem, ethi, GNOME_TYPE_CANVAS_ITEM)

#define d(x)

static void ethi_drop_table_header (ETableHeaderItem *ethi);

/*
 * They display the arrows for the drop location.
 */

static GtkWidget *arrow_up, *arrow_down;

enum {
    PROP_0,
    PROP_TABLE_HEADER,
    PROP_FULL_HEADER,
    PROP_DND_CODE,
    PROP_TABLE_FONT_DESC,
    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->resize_cursor) {
        g_object_unref (ethi->resize_cursor);
        ethi->resize_cursor = NULL;
    }

    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->etfcd.widget)
        g_object_remove_weak_pointer (
            G_OBJECT (ethi->etfcd.widget), &ethi->etfcd.pointer);

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

    /* Chain up to parent's dispose() method. */
    G_OBJECT_CLASS (ethi_parent_class)->dispose (object);
}

static gint
e_table_header_item_get_height (ETableHeaderItem *ethi)
{
    ETableHeader *eth;
    gint numcols, col;
    gint maxheight;

    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;

    for (col = 0; col < numcols; col++) {
        ETableCol *ecol = e_table_header_get_column (eth, col);
        gint 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,
             const cairo_matrix_t *i2c,
             gint flags)
{
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
    gdouble x1, y1, x2, y2;

    if (GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->update)
        GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->update (
            item, i2c, 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;

    x1 = y1 = 0;
    x2 = ethi->width;
    y2 = ethi->height;

    gnome_canvas_matrix_transform_rect (i2c, &x1, &y1, &x2, &y2);

    if (item->x1 != x1 ||
        item->y1 != y1 ||
        item->x2 != x2 ||
        item->y2 != y2) {
        gnome_canvas_request_redraw (
            item->canvas,
            item->x1, item->y1,
            item->x2, item->y2);
        item->x1 = x1;
        item->y1 = y1;
        item->x2 = x2;
        item->y2 = y2;
    }
    gnome_canvas_request_redraw (
        item->canvas, item->x1, item->y1, item->x2, item->y2);
}

static void
ethi_font_set (ETableHeaderItem *ethi,
               PangoFontDescription *font_desc)
{
    if (ethi->font_desc)
        pango_font_description_free (ethi->font_desc);

    ethi->font_desc = pango_font_description_copy (font_desc);

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

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,
                   gint 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 property_id,
                   const GValue *value,
                   GParamSpec *pspec)
{
    GnomeCanvasItem *item;
    ETableHeaderItem *ethi;

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

    switch (property_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_FONT_DESC:
        ethi_font_set (ethi, g_value_get_boxed (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 property_id,
                   GValue *value,
                   GParamSpec *pspec)
{
    ETableHeaderItem *ethi;

    ethi = E_TABLE_HEADER_ITEM (object);

    switch (property_id) {
    case PROP_FULL_HEADER:
        g_value_set_object (value, ethi->full_header);
        break;
    case PROP_DND_CODE:
        g_value_set_string (value, ethi->dnd_code);
        break;
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
        break;
    }
}

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

    d (g_print ("%s:%d: x = %d, x1 = %d\n", G_STRFUNC, __LINE__, x, x1));

    x1 += ethi->group_indent_width;

    if (x < x1) {
        d (g_print ("%s:%d: Returning 0\n", G_STRFUNC, __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", G_STRFUNC, __LINE__, col));
            return col;
        }

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

static gint
ethi_find_col_by_x_nearest (ETableHeaderItem *ethi,
                            gint x)
{
    const gint cols = e_table_header_count (ethi->eth);
    gint x1 = 0;
    gint 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 gchar **xpm)
{
    GdkPixbuf *pixbuf;
    GtkWidget *win, *pix;

    pixbuf = gdk_pixbuf_new_from_xpm_data (xpm);

    win = gtk_window_new (GTK_WINDOW_POPUP);
    gtk_window_set_type_hint (GTK_WINDOW (win), GDK_WINDOW_TYPE_HINT_NOTIFICATION);
    gtk_window_set_resizable (GTK_WINDOW (win), FALSE);

    gtk_widget_set_size_request (win, gdk_pixbuf_get_width (pixbuf), gdk_pixbuf_get_height (pixbuf));

    pix = gtk_image_new_from_pixbuf (pixbuf);
    gtk_widget_realize (win);
    gtk_container_add (GTK_CONTAINER (win), pix);

    g_object_unref (pixbuf);

    return win;
}

static void
ethi_add_drop_marker (ETableHeaderItem *ethi,
                      gint col,
                      gboolean recreate)
{
    GnomeCanvas *canvas;
    GtkAdjustment *adjustment;
    GdkWindow *window;
    gint rx, ry;
    gint 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);
    }

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

    adjustment = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (canvas));
    rx -= gtk_adjustment_get_value (adjustment);

    adjustment = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (canvas));
    ry -= gtk_adjustment_get_value (adjustment);

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

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

static void
ethi_add_destroy_marker (ETableHeaderItem *ethi)
{
    gdouble x1;

    if (ethi->remove_item)
        g_object_run_dispose (G_OBJECT (ethi->remove_item));

    x1 = (gdouble) 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", (gdouble) 1,
        "x2", (gdouble) x1 + e_table_header_col_diff (
            ethi->eth, ethi->drag_col, ethi->drag_col + 1) - 2,

        "y2", (gdouble) ethi->height - 2,
        "fill_color_rgba", 0xFF000080,
        NULL);
}

static void
ethi_remove_destroy_marker (ETableHeaderItem *ethi)
{
    if (!ethi->remove_item)
        return;

    g_object_run_dispose (G_OBJECT (ethi->remove_item));
    ethi->remove_item = NULL;
}

static void
do_drag_motion (ETableHeaderItem *ethi,
                GdkDragContext *context,
                gint x,
                gint y,
                guint time,
                gboolean recreate)
{
    if ((x >= 0) && (x <= (ethi->width)) &&
        (y >= 0) && (y <= (ethi->height))) {
        GdkDragAction suggested_action;
        gint col;
        d (g_print ("In header\n"));

        col = ethi_find_col_by_x_nearest (ethi, x);
        suggested_action = gdk_drag_context_get_suggested_action (context);

        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, 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, 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;
    gint dx = 0;
    GtkAdjustment *adjustment;
    GtkScrollable *scrollable;
    gdouble hadjustment_value;
    gdouble vadjustment_value;
    gdouble page_size;
    gdouble lower;
    gdouble upper;
    gdouble value;

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

    scrollable = GTK_SCROLLABLE (GNOME_CANVAS_ITEM (ethi)->canvas);

    adjustment = gtk_scrollable_get_hadjustment (scrollable);
    hadjustment_value = gtk_adjustment_get_value (adjustment);

    adjustment = gtk_scrollable_get_vadjustment (scrollable);
    vadjustment_value = gtk_adjustment_get_value (adjustment);

    value = hadjustment_value;

    adjustment = gtk_scrollable_get_hadjustment (scrollable);
    page_size = gtk_adjustment_get_page_size (adjustment);
    lower = gtk_adjustment_get_lower (adjustment);
    upper = gtk_adjustment_get_upper (adjustment);

    gtk_adjustment_set_value (
        adjustment, CLAMP (
        hadjustment_value + dx, lower, upper - page_size));

    hadjustment_value = gtk_adjustment_get_value (adjustment);

    if (hadjustment_value != value)
        do_drag_motion (
            ethi,
            ethi->last_drop_context,
            ethi->last_drop_x + hadjustment_value,
            ethi->last_drop_y + vadjustment_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 = e_named_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_dataset_set_data_full (
            context, "e-table-header-item",
            g_object_ref (ethi), context_destroyed);
}

static gboolean
ethi_drag_motion (GtkWidget *widget,
                  GdkDragContext *context,
                  gint x,
                  gint y,
                  guint time,
                  ETableHeaderItem *ethi)
{
    GtkAllocation allocation;
    GtkAdjustment *adjustment;
    GList *targets;
    gdouble hadjustment_value;
    gdouble vadjustment_value;
    gchar *droptype, *headertype;
    guint direction = 0;

    gdk_drag_status (context, 0, time);

    targets = gdk_drag_context_list_targets (context);
    droptype = gdk_atom_name (GDK_POINTER_TO_ATOM (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);

    gtk_widget_get_allocation (widget, &allocation);

    if (x < 20)
        direction |= ET_SCROLL_LEFT;
    if (x > 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);

    adjustment = gtk_scrollable_get_hadjustment (GTK_SCROLLABLE (widget));
    hadjustment_value = gtk_adjustment_get_value (adjustment);

    adjustment = gtk_scrollable_get_vadjustment (GTK_SCROLLABLE (widget));
    vadjustment_value = gtk_adjustment_get_value (adjustment);

    do_drag_motion (
        ethi, context,
        x + hadjustment_value,
        y + 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)
{
    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 *selection_data,
                         guint info,
                         guint time,
                         ETableHeaderItem *ethi)
{
    const guchar *data;
    gint found = FALSE;
    gint count;
    gint column;
    gint drop_col;
    gint i;

    data = gtk_selection_data_get_data (selection_data);

    if (data != NULL) {
        count = e_table_header_count (ethi->eth);
        column = atoi ((gchar *) 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->spec->model_col == 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;

                    ecol = e_table_header_get_column (
                        ethi->full_header, i);

                    if (ecol->spec->model_col == 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->spec->model_col);
        gtk_selection_data_set (
            selection_data,
            GDK_SELECTION_TYPE_STRING,
            sizeof (string[0]),
            (guchar *) 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))) {
        gint col;

        col = ethi_find_col_by_x_nearest (ethi, x);

        ethi_add_drop_marker (ethi, col, FALSE);

        ethi->drop_col = col;

        if (col != -1) {
            gchar *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);
    GtkStyle *style;
    GtkTargetEntry  ethi_drop_types[] = {
        { (gchar *) 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);

    style = gtk_widget_get_style (GTK_WIDGET (item->canvas));

    if (!ethi->font_desc)
        ethi_font_set (ethi, style->font_desc);

    /*
     * 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,
        G_N_ELEMENTS (ethi_drop_types), GDK_ACTION_MOVE);
    g_free ((gpointer) 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);

    if (ethi->font_desc != NULL) {
        pango_font_description_free (ethi->font_desc);
        ethi->font_desc = NULL;
    }

    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 (GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->unrealize)
        (*GNOME_CANVAS_ITEM_CLASS (ethi_parent_class)->unrealize)(item);
}

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

    if (ethi->sort_info) {
        gint length;
        gint i;

        length = e_table_sort_info_grouping_get_count (ethi->sort_info);
        for (i = 0; i < length; i++) {
            ETableColumnSpecification *spec;
            GtkSortType sort_type;

            spec = e_table_sort_info_grouping_get_nth (
                ethi->sort_info, i, &sort_type);

            g_hash_table_insert (
                arrows,
                GINT_TO_POINTER (spec->model_col),
                GINT_TO_POINTER (
                    (sort_type == GTK_SORT_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++) {
            ETableColumnSpecification *spec;
            GtkSortType sort_type;

            spec = e_table_sort_info_sorting_get_nth (
                ethi->sort_info, i, &sort_type);

            g_hash_table_insert (
                arrows,
                GINT_TO_POINTER (spec->model_col),
                GINT_TO_POINTER (
                    (sort_type == GTK_SORT_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;

    context = gtk_widget_get_style_context (GTK_WIDGET (canvas));

    for (col = 0; col < cols; col++, x1 = x2) {
        ETableCol *ecol = e_table_header_get_column (ethi->eth, col);
        gint col_width;
        GtkRegionFlags flags = 0;

        col_width = ecol->width;

        x2 += col_width;

        if (x1 > (x + width))
            break;

        if (x2 < x)
            continue;

        if (x2 <= x1)
            continue;

        if (((col + 1) % 2) == 0)
            flags |= GTK_REGION_EVEN;
        else
            flags |= GTK_REGION_ODD;

        if (col == 0)
            flags |= GTK_REGION_FIRST;

        if (col + 1 == cols)
            flags |= GTK_REGION_LAST;

        gtk_style_context_save (context);
        gtk_style_context_add_region (
            context, GTK_STYLE_REGION_COLUMN_HEADER, flags);

        e_table_header_draw_button (
            cr, ecol, GTK_WIDGET (canvas),
            x1 - x, -y, width, height,
            x2 - x1, ethi->height,
            (ETableColArrow) g_hash_table_lookup (
            arrows, GINT_TO_POINTER (ecol->spec->model_col)));

        gtk_style_context_restore (context);
    }

    g_hash_table_destroy (arrows);
}

static GnomeCanvasItem *
ethi_point (GnomeCanvasItem *item,
            gdouble x,
            gdouble y,
            gint cx,
            gint cy)
{
    return item;
}

/*
 * 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,
                        gint pos,
                        gint *the_total,
                        gint *return_col)
{
    const gint cols = e_table_header_count (ethi->eth);
    gint 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,
            gint pos)
{
    GnomeCanvas *canvas;
    GdkWindow *window;
    gboolean resizable = FALSE;
    gint col;

    canvas = GNOME_CANVAS_ITEM (ethi)->canvas;
    window = gtk_widget_get_window (GTK_WIDGET (canvas));

    /* We might be invoked before we are realized */
    if (window == NULL)
        return;

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

        /* Last column is not resizable */
        if (ecol->spec->resizable && col != last_col) {
            gint 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->spec->resizable) {
                    resizable = TRUE;
                    break;
                }
            }
        }
    }

    if (resizable)
        gdk_window_set_cursor (window, ethi->resize_cursor);
    else
        gdk_window_set_cursor (window, NULL);
}

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

    if (ethi->table)
        e_table_thaw_state_change (ethi->table);
    else if (ethi->tree)
        e_tree_thaw_state_change (ethi->tree);

    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;
    GtkTargetList *list;
    GdkDragContext *context;
    ETableCol *ecol;
    gint col_width;
    cairo_surface_t *s;
    cairo_t *cr;

    gint group_indent = 0;
    GHashTable *arrows = g_hash_table_new (NULL, NULL);

    GtkTargetEntry  ethi_drag_types[] = {
        { (gchar *) TARGET_ETABLE_COL_TYPE, 0, TARGET_ETABLE_COL_HEADER },
    };

    widget = GTK_WIDGET (GNOME_CANVAS_ITEM (ethi)->canvas);
    ethi->drag_col = ethi_find_col_by_x (ethi, event->motion.x);

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

    if (ethi->sort_info) {
        gint length = e_table_sort_info_grouping_get_count (ethi->sort_info);
        gint i;
        for (i = 0; i < length; i++) {
            ETableColumnSpecification *spec;
            GtkSortType sort_type;

            group_indent++;

            spec = e_table_sort_info_grouping_get_nth (
                ethi->sort_info, i, &sort_type);

            g_hash_table_insert (
                arrows,
                GINT_TO_POINTER (spec->model_col),
                GINT_TO_POINTER (
                    (sort_type == GTK_SORT_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++) {
            ETableColumnSpecification *spec;
            GtkSortType sort_type;

            spec = e_table_sort_info_sorting_get_nth (
                ethi->sort_info, i, &sort_type);

            g_hash_table_insert (
                arrows,
                GINT_TO_POINTER (spec->model_col),
                GINT_TO_POINTER (
                    (sort_type == GTK_SORT_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, G_N_ELEMENTS (ethi_drag_types));
    context = gtk_drag_begin (widget, list, GDK_ACTION_MOVE, 1, event);
    g_free ((gpointer) ethi_drag_types[0].target);

    ecol = e_table_header_get_column (ethi->eth, ethi->drag_col);
    col_width = ecol->width;
    s = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, col_width, ethi->height);
    cr = cairo_create (s);

    e_table_header_draw_button (
        cr, ecol,
        widget, 0, 0,
        col_width, ethi->height,
        col_width, ethi->height,
        (ETableColArrow) g_hash_table_lookup (
            arrows, GINT_TO_POINTER (ecol->spec->model_col)));
    gtk_drag_set_icon_surface (context, s);
    cairo_surface_destroy (s);

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

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

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

    col = e_table_header_get_column (ethi->eth, info->col);
    if (col->spec->sortable)
        col_spec = col->spec;

    length = e_table_sort_info_grouping_get_count (ethi->sort_info);
    for (i = 0; i < length; i++) {
        ETableColumnSpecification *spec;

        spec = e_table_sort_info_grouping_get_nth (
            ethi->sort_info, i, NULL);

        if (e_table_column_specification_equal (col_spec, spec)) {
            e_table_sort_info_grouping_set_nth (
                ethi->sort_info, i, spec,
                GTK_SORT_ASCENDING);
            return;
        }
    }

    length = e_table_sort_info_sorting_get_count (ethi->sort_info);
    for (i = 0; i < length; i++) {
        ETableColumnSpecification *spec;

        spec = e_table_sort_info_sorting_get_nth (
            ethi->sort_info, i, NULL);

        if (col_spec == NULL ||
            e_table_column_specification_equal (col_spec, spec)) {
            e_table_sort_info_sorting_set_nth (
                ethi->sort_info, i, spec,
                GTK_SORT_ASCENDING);
            found = TRUE;
            if (col_spec != NULL)
                return;
        }
    }

    if (!found) {
        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,
            col_spec, GTK_SORT_ASCENDING);
    }
}

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

    col = e_table_header_get_column (ethi->eth, info->col);
    if (col->spec->sortable)
        col_spec = col->spec;

    length = e_table_sort_info_grouping_get_count (ethi->sort_info);
    for (i = 0; i < length; i++) {
        ETableColumnSpecification *spec;
        GtkSortType sort_type;

        spec = e_table_sort_info_grouping_get_nth (
            ethi->sort_info, i, &sort_type);

        if (e_table_column_specification_equal (col_spec, spec)) {
            e_table_sort_info_grouping_set_nth (
                ethi->sort_info, i, spec,
                GTK_SORT_DESCENDING);
            return;
        }
    }

    length = e_table_sort_info_sorting_get_count (ethi->sort_info);
    for (i = 0; i < length; i++) {
        ETableColumnSpecification *spec;

        spec = e_table_sort_info_sorting_get_nth (
            ethi->sort_info, i, NULL);

        if (col_spec == NULL ||
            e_table_column_specification_equal (col_spec, spec)) {
            e_table_sort_info_sorting_set_nth (
                ethi->sort_info, i, spec,
                GTK_SORT_DESCENDING);
            found = TRUE;
            if (col_spec != NULL)
                break;
        }
    }

    if (!found) {
        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,
            col_spec, GTK_SORT_DESCENDING);
    }
}

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;

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

    e_table_sort_info_grouping_set_nth (
        info->ethi->sort_info, 0,
        col->spec, GTK_SORT_ASCENDING);
    e_table_sort_info_grouping_truncate (info->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 = info->ethi->etfcd.widget;

    if (etfcd) {
        gtk_window_present (GTK_WINDOW (etfcd));

        return;
    }

    info->ethi->etfcd.widget = e_table_field_chooser_dialog_new ();
    etfcd = info->ethi->etfcd.widget;

    g_object_add_weak_pointer (G_OBJECT (etfcd), &info->ethi->etfcd.pointer);

    g_object_set (
        info->ethi->etfcd.widget,
        "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;
    gint 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)
{
    ETableState *state;

    state = e_table_state_duplicate (config->state);

    if (ethi->table != NULL)
        e_table_set_state_object (ethi->table, state);
    if (ethi->tree != NULL)
        e_tree_set_state_object (ethi->tree, state);

    g_object_unref (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, GTK_WINDOW (gtk_widget_get_toplevel (widget)));
        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 C_olumn..."),
        G_CALLBACK (ethi_popup_field_chooser), 0),
    E_POPUP_SEPARATOR,
    E_POPUP_ITEM (
        N_("A_lignment"),
        G_CALLBACK (ethi_popup_alignment), 128),
    E_POPUP_ITEM (
        N_("B_est Fit"),
        G_CALLBACK (ethi_popup_best_fit), 2),
    E_POPUP_ITEM (
        N_("Format Column_s..."),
        G_CALLBACK (ethi_popup_format_columns), 128),
    E_POPUP_SEPARATOR,
    E_POPUP_ITEM (
        N_("Custo_mize Current View..."),
        G_CALLBACK (ethi_popup_customize_view), 4),
    E_POPUP_TERMINATOR
};

static void
sort_by_id (GtkWidget *menu_item,
            ETableHeaderItem *ethi)
{
    ETableCol *ecol;
    gboolean clearfirst;
    gint col;

    col = GPOINTER_TO_INT (g_object_get_data (
        G_OBJECT (menu_item), "col-number"));
    ecol = e_table_header_get_column (ethi->full_header, col);
    clearfirst = e_table_sort_info_sorting_get_count (ethi->sort_info) > 1;

    if (!clearfirst && ecol &&
        e_table_sort_info_sorting_get_count (ethi->sort_info) == 1) {
        ETableColumnSpecification *spec;

        spec = e_table_sort_info_sorting_get_nth (
            ethi->sort_info, 0, NULL);
        clearfirst = ecol->spec->sortable && ecol->spec != spec;
    }

    if (clearfirst)
        e_table_sort_info_sorting_truncate (ethi->sort_info, 0);

    ethi_change_sort_state (ethi, ecol, E_TABLE_HEADER_ITEM_SORT_FLAG_NONE);
}

static void
popup_custom (GtkWidget *menu_item,
              EthiHeaderInfo *info)
{
    ethi_popup_customize_view (menu_item, info);
}

static void
ethi_header_context_menu (ETableHeaderItem *ethi,
                          GdkEvent *button_event)
{
    EthiHeaderInfo *info = g_new (EthiHeaderInfo, 1);
    GtkMenu *popup;
    gint ncol, sort_count, sort_col;
    GtkWidget *menu_item, *sub_menu;
    gboolean ascending = TRUE;
    gdouble event_x_win = 0;
    gdouble event_y_win = 0;
    guint event_button = 0;
    guint32 event_time;

    d (g_print ("ethi_header_context_menu: \n"));

    gdk_event_get_button (button_event, &event_button);
    gdk_event_get_coords (button_event, &event_x_win, &event_y_win);
    event_time = gdk_event_get_time (button_event);

    info->ethi = ethi;
    info->col = ethi_find_col_by_x (ethi, event_x_win);

    popup = e_popup_menu_create_with_domain (
        ethi_context_menu,
        1 +
        ((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, GETTEXT_PACKAGE);

    menu_item = gtk_menu_item_new_with_mnemonic (_("_Sort By"));
    gtk_widget_show (menu_item);
    sub_menu = gtk_menu_new ();
    gtk_widget_show (sub_menu);
    gtk_menu_item_set_submenu (GTK_MENU_ITEM (menu_item), sub_menu);
    gtk_menu_shell_prepend (GTK_MENU_SHELL (popup), menu_item);

    sort_count = e_table_sort_info_sorting_get_count (ethi->sort_info);

    if (sort_count > 1 || sort_count < 1)
        sort_col = -1; /* Custom sorting */
    else {
        ETableColumnSpecification *spec;
        GtkSortType sort_type;

        spec = e_table_sort_info_sorting_get_nth (
            ethi->sort_info, 0, &sort_type);

        sort_col = spec->model_col;
        ascending = (sort_type == GTK_SORT_ASCENDING);
    }

    /* Custom */
    menu_item = gtk_check_menu_item_new_with_mnemonic (_("_Custom"));
    gtk_widget_show (menu_item);
    gtk_menu_shell_prepend (GTK_MENU_SHELL (sub_menu), menu_item);
    if (sort_col == -1)
        gtk_check_menu_item_set_active (GTK_CHECK_MENU_ITEM (menu_item), TRUE);
    gtk_check_menu_item_set_draw_as_radio (GTK_CHECK_MENU_ITEM (menu_item), TRUE);
    g_signal_connect (
        menu_item, "activate",
        G_CALLBACK (popup_custom), info);

    /* Show a seperator */
    menu_item = gtk_separator_menu_item_new ();
    gtk_widget_show (menu_item);
    gtk_menu_shell_prepend (GTK_MENU_SHELL (sub_menu), menu_item);
    /* Headers */
    for (ncol = 0; ncol < ethi->full_header->col_count; ncol++)
    {
        gchar *text = NULL;

        if (!ethi->full_header->columns[ncol]->spec->sortable ||
            ethi->full_header->columns[ncol]->spec->disabled)
            continue;

        if (ncol == sort_col) {
            text = g_strdup_printf (
                "%s (%s)",
                ethi->full_header->columns[ncol]->text,
                ascending ? _("Ascending"):_("Descending"));
            menu_item = gtk_check_menu_item_new_with_label (text);
            g_free (text);
        } else
            menu_item = gtk_check_menu_item_new_with_label (
                ethi->full_header->columns[ncol]->text);

        gtk_widget_show (menu_item);
        gtk_menu_shell_prepend (GTK_MENU_SHELL (sub_menu), menu_item);

        if (ncol == sort_col)
            gtk_check_menu_item_set_active (
                GTK_CHECK_MENU_ITEM (menu_item), TRUE);
        gtk_check_menu_item_set_draw_as_radio (
            GTK_CHECK_MENU_ITEM (menu_item), TRUE);
        g_object_set_data (
            G_OBJECT (menu_item), "col-number",
            GINT_TO_POINTER (ncol));
        g_signal_connect (
            menu_item, "activate",
            G_CALLBACK (sort_by_id), ethi);
    }

    g_object_ref_sink (popup);
    g_signal_connect (
        popup, "selection-done",
        G_CALLBACK (free_popup_info), info);

    gtk_menu_popup (
        GTK_MENU (popup),
        NULL, NULL, NULL, NULL,
        event_button, event_time);
}

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

void
ethi_change_sort_state (ETableHeaderItem *ethi,
                        ETableCol *col,
            ETableHeaderItemSortFlag flag)
{
    ETableColumnSpecification *col_spec = NULL;
    gint length;
    gint i;
    gboolean found = FALSE;

    if (col == NULL)
        return;

    if (col->spec->sortable)
        col_spec = col->spec;

    length = e_table_sort_info_grouping_get_count (ethi->sort_info);
    for (i = 0; i < length; i++) {
        ETableColumnSpecification *spec;
        GtkSortType sort_type;

        spec = e_table_sort_info_grouping_get_nth (
            ethi->sort_info, i, &sort_type);

        /* Invert the sort type. */
        if (sort_type == GTK_SORT_ASCENDING)
            sort_type = GTK_SORT_DESCENDING;
        else
            sort_type = GTK_SORT_ASCENDING;

        if (col_spec == NULL ||
            e_table_column_specification_equal (col_spec, spec)) {
            e_table_sort_info_grouping_set_nth (
                ethi->sort_info, i, spec, sort_type);
            found = TRUE;
            if (col_spec != NULL)
                break;
        }
    }

    if (!found) {
        length = e_table_sort_info_sorting_get_count (ethi->sort_info);
        for (i = 0; i < length; i++) {
            ETableColumnSpecification *spec;
            GtkSortType sort_type;

            spec = e_table_sort_info_sorting_get_nth (
                ethi->sort_info, i, &sort_type);

            if (col_spec == NULL ||
                e_table_column_specification_equal (col_spec, spec)) {
                if (sort_type == GTK_SORT_DESCENDING && col_spec != NULL) {
                    /*
                     * This means the user has clicked twice
                     * already, lets kill sorting of this column now.
                     */
                    e_table_sort_info_sorting_remove (
                        ethi->sort_info, i);
                    length--;
                    i--;
                } else {
                    /* Invert the sort type. */
                    if (sort_type == GTK_SORT_ASCENDING)
                        sort_type = GTK_SORT_DESCENDING;
                    else
                        sort_type = GTK_SORT_ASCENDING;

                    e_table_sort_info_sorting_set_nth (
                        ethi->sort_info, i, spec, sort_type);
                }
                found = TRUE;
                if (col_spec != NULL)
                    break;
            }
        }
    }

    if (!found && col_spec != NULL) {
        if (flag == E_TABLE_HEADER_ITEM_SORT_FLAG_NONE) {
            e_table_sort_info_sorting_truncate (ethi->sort_info, 0);
            e_table_sort_info_sorting_set_nth (
                ethi->sort_info, 0,
                col_spec, GTK_SORT_ASCENDING);
        } else {
            guint index = 0;

            if (flag == E_TABLE_HEADER_ITEM_SORT_FLAG_ADD_AS_LAST)
                index = e_table_sort_info_sorting_get_count (ethi->sort_info);

            e_table_sort_info_sorting_insert (
                ethi->sort_info, index,
                col_spec, GTK_SORT_ASCENDING);
        }
    }
}

/*
 * Handles the events on the ETableHeaderItem, particularly it handles resizing
 */
static gint
ethi_event (GnomeCanvasItem *item,
            GdkEvent *event)
{
    ETableHeaderItem *ethi = E_TABLE_HEADER_ITEM (item);
    GnomeCanvas *canvas = item->canvas;
    GdkWindow *window;
    const gboolean resizing = ETHI_RESIZING (ethi);
    gint x, y, start, col;
    gint was_maybe_drag = 0;
    GdkModifierType event_state = 0;
    guint event_button = 0;
    guint event_keyval = 0;
    gdouble event_x_win = 0;
    gdouble event_y_win = 0;
    guint32 event_time;
    ETableHeaderItemSortFlag sort_flag = E_TABLE_HEADER_ITEM_SORT_FLAG_NONE;

    /* Don't fetch the device here.  GnomeCanvas frequently emits
     * synthesized events, and calling gdk_event_get_device() on them
     * will trigger a runtime warning.  Fetch the device where needed. */
    gdk_event_get_button (event, &event_button);
    gdk_event_get_coords (event, &event_x_win, &event_y_win);
    gdk_event_get_keyval (event, &event_keyval);
    gdk_event_get_state (event, &event_state);
    event_time = gdk_event_get_time (event);

    if ((event_state & GDK_CONTROL_MASK) != 0) {
        if ((event_state & GDK_SHIFT_MASK) != 0)
            sort_flag = E_TABLE_HEADER_ITEM_SORT_FLAG_ADD_AS_LAST;
        else
            sort_flag = E_TABLE_HEADER_ITEM_SORT_FLAG_ADD_AS_FIRST;
    }

    switch (event->type) {
    case GDK_ENTER_NOTIFY:
        convert (canvas, event_x_win, event_y_win, &x, &y);
        set_cursor (ethi, x);
        break;

    case GDK_LEAVE_NOTIFY:
        window = gtk_widget_get_window (GTK_WIDGET (canvas));
        gdk_window_set_cursor (window, NULL);
        break;

    case GDK_MOTION_NOTIFY:

        convert (canvas, event_x_win, event_y_win, &x, &y);
        if (resizing) {
            gint new_width;

            if (ethi->resize_guide == NULL) {
                GdkDevice *event_device;

                /* Quick hack until I actually bind the views */
                ethi->resize_guide = GINT_TO_POINTER (1);

                event_device = gdk_event_get_device (event);

                gnome_canvas_item_grab (
                    item,
                    GDK_POINTER_MOTION_MASK |
                    GDK_BUTTON_RELEASE_MASK,
                    ethi->resize_cursor,
                    event_device,
                    event_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, &event->motion)) {
            ethi_start_drag (ethi, event);
        } else
            set_cursor (ethi, x);
        break;

    case GDK_BUTTON_PRESS:
        if (event_button > 3)
            return FALSE;

        convert (canvas, event_x_win, event_y_win, &x, &y);

        if (is_pointer_on_division (ethi, x, &start, &col) &&
            event_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->spec->resizable)
                break;
            ethi->resize_col = col;
            ethi->resize_start_pos = start - ecol->width;
            ethi->resize_min_width = ecol->min_width;

            if (ethi->table)
                e_table_freeze_state_change (ethi->table);
            else if (ethi->tree)
                e_tree_freeze_state_change (ethi->tree);
        } else {
            if (event_button == 1) {
                ethi->click_x = event_x_win;
                ethi->click_y = event_y_win;
                ethi->maybe_drag = TRUE;
                is_pointer_on_division (ethi, x, &start, &col);
                ethi->selected_col = col;
                if (gtk_widget_get_can_focus (GTK_WIDGET (item->canvas)))
                    e_canvas_item_grab_focus (item, TRUE);
            } else if (event_button == 3) {
                ethi_header_context_menu (ethi, event);
            } else
                ethi_button_pressed (ethi, event);
        }
        break;

    case GDK_2BUTTON_PRESS:
        if (!resizing)
            break;

        if (event_button != 1)
            break;
        else {
            gint width = 0;
            g_signal_emit_by_name (
                ethi->eth,
                "request_width",
                (gint) 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 *ecol;

            col = ethi_find_col_by_x (ethi, event_x_win);
            ecol = e_table_header_get_column (ethi->eth, col);
            ethi_change_sort_state (ethi, ecol, sort_flag);
        }

        if (needs_ungrab)
            gnome_canvas_item_ungrab (item, event_time);

        break;
    }
    case GDK_KEY_PRESS:
        if ((event_keyval == GDK_KEY_F10) && (event_state & GDK_SHIFT_MASK)) {
            EthiHeaderInfo *info = g_new (EthiHeaderInfo, 1);
            ETableCol *ecol;
            GtkMenu *popup;

            info->ethi = ethi;
            info->col = ethi->selected_col;
            ecol = e_table_header_get_column (ethi->eth, info->col);

            popup = e_popup_menu_create_with_domain (
                ethi_context_menu,
                1 +
                (ecol->spec->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, GETTEXT_PACKAGE);
            g_object_ref_sink (popup);
            g_signal_connect (
                popup, "selection-done",
                G_CALLBACK (free_popup_info), info);
            gtk_menu_popup (
                GTK_MENU (popup),
                NULL, NULL, NULL, NULL,
                0, GDK_CURRENT_TIME);
        } else if (event_keyval == GDK_KEY_space) {
            ETableCol *ecol;

            ecol = e_table_header_get_column (ethi->eth, ethi->selected_col);
            ethi_change_sort_state (ethi, ecol, sort_flag);
        } else if ((event_keyval == GDK_KEY_Right) ||
                (event_keyval == GDK_KEY_KP_Right)) {
            ETableCol *ecol;

            if ((ethi->selected_col < 0) ||
                (ethi->selected_col >= ethi->eth->col_count - 1))
                ethi->selected_col = 0;
            else
                ethi->selected_col++;
            ecol = e_table_header_get_column (ethi->eth, ethi->selected_col);
            ethi_change_sort_state (ethi, ecol, sort_flag);
        } else if ((event_keyval == GDK_KEY_Left) ||
               (event_keyval == GDK_KEY_KP_Left)) {
            ETableCol *ecol;

            if ((ethi->selected_col <= 0) ||
                (ethi->selected_col >= ethi->eth->col_count))
                ethi->selected_col = ethi->eth->col_count - 1;
            else
                ethi->selected_col--;
            ecol = e_table_header_get_column (ethi->eth, ethi->selected_col);
            ethi_change_sort_state (ethi, ecol, sort_flag);
        }
        break;

    default:
        return FALSE;
    }
    return TRUE;
}

static void
ethi_class_init (ETableHeaderItemClass *class)
{
    GnomeCanvasItemClass *item_class = GNOME_CANVAS_ITEM_CLASS (class);
    GObjectClass *object_class = G_OBJECT_CLASS (class);

    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",
            NULL,
            NULL,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_TABLE_FONT_DESC,
        g_param_spec_boxed (
            "font-desc",
            "Font Description",
            NULL,
            PANGO_TYPE_FONT_DESCRIPTION,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_FULL_HEADER,
        g_param_spec_object (
            "full_header",
            "Full Header",
            NULL,
            E_TYPE_TABLE_HEADER,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_TABLE_HEADER,
        g_param_spec_object (
            "ETableHeader",
            "Header",
            NULL,
            E_TYPE_TABLE_HEADER,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_SORT_INFO,
        g_param_spec_object (
            "sort_info",
            "Sort Info",
            NULL,
            E_TYPE_TABLE_SORT_INFO,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_TABLE,
        g_param_spec_object (
            "table",
            "Table",
            NULL,
            E_TYPE_TABLE,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_TREE,
        g_param_spec_object (
            "tree",
            "Tree",
            NULL,
            E_TYPE_TREE,
            G_PARAM_WRITABLE));

    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,
        g_cclosure_marshal_VOID__BOXED,
        G_TYPE_NONE, 1,
        GDK_TYPE_EVENT | G_SIGNAL_TYPE_STATIC_SCOPE);
}

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

    ethi->resize_cursor = gdk_cursor_new (GDK_SB_H_DOUBLE_ARROW);

    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;
}