path: root/e-util/e-table-group-leaf.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; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *      Chris Lahey <clahey@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

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

#include "e-table-group-leaf.h"

#include <gtk/gtk.h>
#include <glib/gi18n.h>

#include <libgnomecanvas/libgnomecanvas.h>

#include "e-canvas.h"
#include "e-table-item.h"
#include "e-table-sorted.h"
#include "e-table-sorted-variable.h"

G_DEFINE_TYPE (
    ETableGroupLeaf,
    e_table_group_leaf,
    E_TYPE_TABLE_GROUP)

enum {
    PROP_0,
    PROP_HEIGHT,
    PROP_WIDTH,
    PROP_MINIMUM_WIDTH,
    PROP_FROZEN,
    PROP_TABLE_ALTERNATING_ROW_COLORS,
    PROP_TABLE_HORIZONTAL_DRAW_GRID,
    PROP_TABLE_VERTICAL_DRAW_GRID,
    PROP_TABLE_DRAW_FOCUS,
    PROP_CURSOR_MODE,
    PROP_LENGTH_THRESHOLD,
    PROP_SELECTION_MODEL,
    PROP_UNIFORM_ROW_HEIGHT
};

static void
etgl_dispose (GObject *object)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (object);

    if (etgl->ets) {
        g_object_unref (etgl->ets);
        etgl->ets = NULL;
    }

    if (etgl->item) {
        if (etgl->etgl_cursor_change_id != 0)
            g_signal_handler_disconnect (
                etgl->item,
                etgl->etgl_cursor_change_id);
        if (etgl->etgl_cursor_activated_id != 0)
            g_signal_handler_disconnect (
                etgl->item,
                etgl->etgl_cursor_activated_id);
        if (etgl->etgl_double_click_id != 0)
            g_signal_handler_disconnect (
                etgl->item,
                etgl->etgl_double_click_id);
        if (etgl->etgl_right_click_id != 0)
            g_signal_handler_disconnect (
                etgl->item,
                etgl->etgl_right_click_id);
        if (etgl->etgl_click_id != 0)
            g_signal_handler_disconnect (
                etgl->item,
                etgl->etgl_click_id);
        if (etgl->etgl_key_press_id != 0)
            g_signal_handler_disconnect (
                etgl->item,
                etgl->etgl_key_press_id);
        if (etgl->etgl_start_drag_id != 0)
            g_signal_handler_disconnect (
                etgl->item,
                etgl->etgl_start_drag_id);

        etgl->etgl_cursor_change_id = 0;
        etgl->etgl_cursor_activated_id = 0;
        etgl->etgl_double_click_id = 0;
        etgl->etgl_right_click_id = 0;
        etgl->etgl_click_id = 0;
        etgl->etgl_key_press_id = 0;
        etgl->etgl_start_drag_id = 0;

        g_object_run_dispose (G_OBJECT (etgl->item));
        etgl->item = NULL;
    }

    if (etgl->selection_model) {
        g_object_unref (etgl->selection_model);
        etgl->selection_model = NULL;
    }

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

static void
e_table_group_leaf_construct (GnomeCanvasGroup *parent,
                              ETableGroupLeaf *etgl,
                              ETableHeader *full_header,
                              ETableHeader *header,
                              ETableModel *model,
                              ETableSortInfo *sort_info)
{
    etgl->is_grouped =
        (e_table_sort_info_grouping_get_count (sort_info) > 0);

    if (etgl->is_grouped)
        etgl->ets = e_table_sorted_variable_new (
            model, full_header, sort_info);
    else
        etgl->ets = e_table_sorted_new (
            model, full_header, sort_info);

    e_table_group_construct (
        parent, E_TABLE_GROUP (etgl), full_header, header, model);
}

/**
 * e_table_group_leaf_new
 * @parent: The %GnomeCanvasGroup to create a child of.
 * @full_header: The full header of the %ETable.
 * @header: The current header of the %ETable.
 * @model: The %ETableModel of the %ETable.
 * @sort_info: The %ETableSortInfo of the %ETable.
 *
 * %ETableGroupLeaf is an %ETableGroup which simply contains an
 * %ETableItem.
 *
 * Returns: The new %ETableGroupLeaf.
 */
ETableGroup *
e_table_group_leaf_new (GnomeCanvasGroup *parent,
                        ETableHeader *full_header,
                        ETableHeader *header,
                        ETableModel *model,
                        ETableSortInfo *sort_info)
{
    ETableGroupLeaf *etgl;

    g_return_val_if_fail (parent != NULL, NULL);

    etgl = g_object_new (E_TYPE_TABLE_GROUP_LEAF, NULL);

    e_table_group_leaf_construct (
        parent, etgl, full_header,
        header, model, sort_info);

    return E_TABLE_GROUP (etgl);
}

static void
etgl_cursor_change (GObject *object,
                    gint view_row,
                    ETableGroupLeaf *etgl)
{
    ETableSubset *table_subset;
    gint model_row;

    table_subset = E_TABLE_SUBSET (etgl->ets);
    model_row = e_table_subset_view_to_model_row (table_subset, view_row);

    if (model_row < 0)
        return;

    e_table_group_cursor_change (E_TABLE_GROUP (etgl), model_row);
}

static void
etgl_cursor_activated (GObject *object,
                       gint view_row,
                       ETableGroupLeaf *etgl)
{
    ETableSubset *table_subset;
    gint model_row;

    table_subset = E_TABLE_SUBSET (etgl->ets);
    model_row = e_table_subset_view_to_model_row (table_subset, view_row);

    if (model_row < 0)
        return;

    e_table_group_cursor_activated (E_TABLE_GROUP (etgl), model_row);
}

static void
etgl_double_click (GObject *object,
                   gint model_row,
                   gint model_col,
                   GdkEvent *event,
                   ETableGroupLeaf *etgl)
{
    e_table_group_double_click (
        E_TABLE_GROUP (etgl), model_row, model_col, event);
}

static gboolean
etgl_key_press (GObject *object,
                gint row,
                gint col,
                GdkEvent *event,
                ETableGroupLeaf *etgl)
{
    ETableSubset *table_subset;
    gint model_row;

    table_subset = E_TABLE_SUBSET (etgl->ets);
    model_row = e_table_subset_view_to_model_row (table_subset, row);

    if (model_row < 0)
        return FALSE;

    return e_table_group_key_press (
        E_TABLE_GROUP (etgl), model_row, col, event);
}

static gboolean
etgl_start_drag (GObject *object,
                 gint model_row,
                 gint model_col,
                 GdkEvent *event,
                 ETableGroupLeaf *etgl)
{
    return e_table_group_start_drag (
        E_TABLE_GROUP (etgl), model_row, model_col, event);
}

static gboolean
etgl_right_click (GObject *object,
                  gint view_row,
                  gint model_col,
                  GdkEvent *event,
                  ETableGroupLeaf *etgl)
{
    ETableSubset *table_subset;
    gint model_row;

    table_subset = E_TABLE_SUBSET (etgl->ets);
    model_row = e_table_subset_view_to_model_row (table_subset, view_row);

    if (model_row < 0)
        return FALSE;

    return e_table_group_right_click (
        E_TABLE_GROUP (etgl), model_row, model_col, event);
}

static gboolean
etgl_click (GObject *object,
            gint row,
            gint col,
            GdkEvent *event,
            ETableGroupLeaf *etgl)
{
    ETableSubset *table_subset;
    gint model_row;

    table_subset = E_TABLE_SUBSET (etgl->ets);
    model_row = e_table_subset_view_to_model_row (table_subset, row);

    if (model_row < 0)
        return FALSE;

    return e_table_group_click (
        E_TABLE_GROUP (etgl), model_row, col, event);
}

static void
etgl_reflow (GnomeCanvasItem *item,
             gint flags)
{
    ETableGroupLeaf *leaf = E_TABLE_GROUP_LEAF (item);

    g_object_get (leaf->item, "height", &leaf->height, NULL);
    g_object_get (leaf->item, "width", &leaf->width, NULL);

    e_canvas_item_request_parent_reflow (item);
}

static void
etgl_realize (GnomeCanvasItem *item)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (item);

    if (GNOME_CANVAS_ITEM_CLASS (e_table_group_leaf_parent_class)->realize)
        GNOME_CANVAS_ITEM_CLASS (e_table_group_leaf_parent_class)->realize (item);

    etgl->item = E_TABLE_ITEM (gnome_canvas_item_new (
        GNOME_CANVAS_GROUP (etgl),
        e_table_item_get_type (),
        "ETableHeader", E_TABLE_GROUP (etgl)->header,
        "ETableModel", etgl->ets,
        "alternating_row_colors", etgl->alternating_row_colors,
        "horizontal_draw_grid", etgl->horizontal_draw_grid,
        "vertical_draw_grid", etgl->vertical_draw_grid,
        "drawfocus", etgl->draw_focus,
        "cursor_mode", etgl->cursor_mode,
        "minimum_width", etgl->minimum_width,
        "length_threshold", etgl->length_threshold,
        "selection_model", etgl->selection_model,
        "uniform_row_height", etgl->uniform_row_height,
        NULL));

    etgl->etgl_cursor_change_id = g_signal_connect (
        etgl->item, "cursor_change",
        G_CALLBACK (etgl_cursor_change), etgl);

    etgl->etgl_cursor_activated_id = g_signal_connect (
        etgl->item, "cursor_activated",
        G_CALLBACK (etgl_cursor_activated), etgl);

    etgl->etgl_double_click_id = g_signal_connect (
        etgl->item, "double_click",
        G_CALLBACK (etgl_double_click), etgl);

    etgl->etgl_right_click_id = g_signal_connect (
        etgl->item, "right_click",
        G_CALLBACK (etgl_right_click), etgl);

    etgl->etgl_click_id = g_signal_connect (
        etgl->item, "click",
        G_CALLBACK (etgl_click), etgl);

    etgl->etgl_key_press_id = g_signal_connect (
        etgl->item, "key_press",
        G_CALLBACK (etgl_key_press), etgl);

    etgl->etgl_start_drag_id = g_signal_connect (
        etgl->item, "start_drag",
        G_CALLBACK (etgl_start_drag), etgl);

    e_canvas_item_request_reflow (item);
}

static void
etgl_add (ETableGroup *etg,
          gint row)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    if (E_IS_TABLE_SUBSET_VARIABLE (etgl->ets)) {
        e_table_subset_variable_add (
            E_TABLE_SUBSET_VARIABLE (etgl->ets), row);
    }
}

static void
etgl_add_array (ETableGroup *etg,
                const gint *array,
                gint count)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    if (E_IS_TABLE_SUBSET_VARIABLE (etgl->ets)) {
        e_table_subset_variable_add_array (
            E_TABLE_SUBSET_VARIABLE (etgl->ets), array, count);
    }
}

static void
etgl_add_all (ETableGroup *etg)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    if (E_IS_TABLE_SUBSET_VARIABLE (etgl->ets)) {
        e_table_subset_variable_add_all (
            E_TABLE_SUBSET_VARIABLE (etgl->ets));
    }
}

static gboolean
etgl_remove (ETableGroup *etg,
             gint row)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    if (E_IS_TABLE_SUBSET_VARIABLE (etgl->ets)) {
        return e_table_subset_variable_remove (
            E_TABLE_SUBSET_VARIABLE (etgl->ets), row);
    }
    return FALSE;
}

static void
etgl_increment (ETableGroup *etg,
                gint position,
                gint amount)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    if (E_IS_TABLE_SUBSET_VARIABLE (etgl->ets)) {
        e_table_subset_variable_increment (
            E_TABLE_SUBSET_VARIABLE (etgl->ets),
            position, amount);
    }
}

static void
etgl_decrement (ETableGroup *etg,
                gint position,
                gint amount)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    if (E_IS_TABLE_SUBSET_VARIABLE (etgl->ets)) {
        e_table_subset_variable_decrement (
            E_TABLE_SUBSET_VARIABLE (etgl->ets),
            position, amount);
    }
}

static gint
etgl_row_count (ETableGroup *etg)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    return e_table_model_row_count (E_TABLE_MODEL (etgl->ets));
}

static void
etgl_set_focus (ETableGroup *etg,
                EFocus direction,
                gint view_col)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    if (direction == E_FOCUS_END) {
        e_table_item_set_cursor (
            etgl->item, view_col,
            e_table_model_row_count (E_TABLE_MODEL (etgl->ets)) - 1);
    } else {
        e_table_item_set_cursor (etgl->item, view_col, 0);
    }
}

static gint
etgl_get_focus_column (ETableGroup *etg)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    return e_table_item_get_focused_column (etgl->item);
}

static EPrintable *
etgl_get_printable (ETableGroup *etg)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    return e_table_item_get_printable (etgl->item);
}

static void
etgl_compute_location (ETableGroup *etg,
                       gint *x,
                       gint *y,
                       gint *row,
                       gint *col)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    e_table_item_compute_location (etgl->item, x, y, row, col);
}

static void
etgl_get_mouse_over (ETableGroup *etg,
                     gint *row,
                     gint *col)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    if (etgl->item && etgl->item->motion_row > -1 && etgl->item->motion_col > -1) {
        if (row)
            *row = etgl->item->motion_row;
        if (col)
            *col = etgl->item->motion_col;
    }
}

static void
etgl_get_cell_geometry (ETableGroup *etg,
                        gint *row,
                        gint *col,
                        gint *x,
                        gint *y,
                        gint *width,
                        gint *height)
{
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (etg);

    e_table_item_get_cell_geometry (etgl->item, row, col, x, y, width, height);
}

static void
etgl_set_property (GObject *object,
                   guint property_id,
                   const GValue *value,
                   GParamSpec *pspec)
{
    ETableGroup *etg = E_TABLE_GROUP (object);
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (object);

    switch (property_id) {
    case PROP_FROZEN:
        etg->frozen = g_value_get_boolean (value);
        break;
    case PROP_MINIMUM_WIDTH:
    case PROP_WIDTH:
        etgl->minimum_width = g_value_get_double (value);
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "minimum_width", etgl->minimum_width,
                NULL);
        }
        break;
    case PROP_LENGTH_THRESHOLD:
        etgl->length_threshold = g_value_get_int (value);
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "length_threshold", etgl->length_threshold,
                NULL);
        }
        break;
    case PROP_SELECTION_MODEL:
        if (etgl->selection_model)
            g_object_unref (etgl->selection_model);
        etgl->selection_model = E_SELECTION_MODEL (g_value_get_object (value));
        if (etgl->selection_model) {
            g_object_ref (etgl->selection_model);
        }
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "selection_model", etgl->selection_model,
                NULL);
        }
        break;

    case PROP_UNIFORM_ROW_HEIGHT:
        etgl->uniform_row_height = g_value_get_boolean (value);
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "uniform_row_height", etgl->uniform_row_height,
                NULL);
        }
        break;

    case PROP_TABLE_ALTERNATING_ROW_COLORS:
        etgl->alternating_row_colors = g_value_get_boolean (value);
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "alternating_row_colors", etgl->alternating_row_colors,
                NULL);
        }
        break;

    case PROP_TABLE_HORIZONTAL_DRAW_GRID:
        etgl->horizontal_draw_grid = g_value_get_boolean (value);
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "horizontal_draw_grid", etgl->horizontal_draw_grid,
                NULL);
        }
        break;

    case PROP_TABLE_VERTICAL_DRAW_GRID:
        etgl->vertical_draw_grid = g_value_get_boolean (value);
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "vertical_draw_grid", etgl->vertical_draw_grid,
                NULL);
        }
        break;

    case PROP_TABLE_DRAW_FOCUS:
        etgl->draw_focus = g_value_get_boolean (value);
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "drawfocus", etgl->draw_focus,
                NULL);
        }
        break;

    case PROP_CURSOR_MODE:
        etgl->cursor_mode = g_value_get_int (value);
        if (etgl->item) {
            gnome_canvas_item_set (
                GNOME_CANVAS_ITEM (etgl->item),
                "cursor_mode", etgl->cursor_mode,
                NULL);
        }
        break;
    default:
        break;
    }
}

static void
etgl_get_property (GObject *object,
                   guint property_id,
                   GValue *value,
                   GParamSpec *pspec)
{
    ETableGroup *etg = E_TABLE_GROUP (object);
    ETableGroupLeaf *etgl = E_TABLE_GROUP_LEAF (object);

    switch (property_id) {
    case PROP_FROZEN:
        g_value_set_boolean (value, etg->frozen);
        break;
    case PROP_HEIGHT:
        g_value_set_double (value, etgl->height);
        break;
    case PROP_WIDTH:
        g_value_set_double (value, etgl->width);
        break;
    case PROP_MINIMUM_WIDTH:
        g_value_set_double (value, etgl->minimum_width);
        break;
    case PROP_UNIFORM_ROW_HEIGHT:
        g_value_set_boolean (value, etgl->uniform_row_height);
    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
        break;
    }
}

static void
e_table_group_leaf_class_init (ETableGroupLeafClass *class)
{
    GnomeCanvasItemClass *item_class = GNOME_CANVAS_ITEM_CLASS (class);
    ETableGroupClass *e_group_class = E_TABLE_GROUP_CLASS (class);
    GObjectClass *object_class = G_OBJECT_CLASS (class);

    object_class->dispose = etgl_dispose;
    object_class->set_property = etgl_set_property;
    object_class->get_property = etgl_get_property;

    item_class->realize = etgl_realize;

    e_group_class->add = etgl_add;
    e_group_class->add_array = etgl_add_array;
    e_group_class->add_all = etgl_add_all;
    e_group_class->remove = etgl_remove;
    e_group_class->increment  = etgl_increment;
    e_group_class->decrement  = etgl_decrement;
    e_group_class->row_count  = etgl_row_count;
    e_group_class->set_focus  = etgl_set_focus;
    e_group_class->get_focus_column = etgl_get_focus_column;
    e_group_class->get_printable = etgl_get_printable;
    e_group_class->compute_location = etgl_compute_location;
    e_group_class->get_mouse_over = etgl_get_mouse_over;
    e_group_class->get_cell_geometry = etgl_get_cell_geometry;

    g_object_class_install_property (
        object_class,
        PROP_TABLE_ALTERNATING_ROW_COLORS,
        g_param_spec_boolean (
            "alternating_row_colors",
            "Alternating Row Colors",
            "Alternating Row Colors",
            FALSE,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_TABLE_HORIZONTAL_DRAW_GRID,
        g_param_spec_boolean (
            "horizontal_draw_grid",
            "Horizontal Draw Grid",
            "Horizontal Draw Grid",
            FALSE,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_TABLE_VERTICAL_DRAW_GRID,
        g_param_spec_boolean (
            "vertical_draw_grid",
            "Vertical Draw Grid",
            "Vertical Draw Grid",
            FALSE,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_TABLE_DRAW_FOCUS,
        g_param_spec_boolean (
            "drawfocus",
            "Draw focus",
            "Draw focus",
            FALSE,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_CURSOR_MODE,
        g_param_spec_int (
            "cursor_mode",
            "Cursor mode",
            "Cursor mode",
            E_CURSOR_LINE,
            E_CURSOR_SPREADSHEET,
            E_CURSOR_LINE,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_LENGTH_THRESHOLD,
        g_param_spec_int (
            "length_threshold",
            "Length Threshold",
            "Length Threshold",
            -1, G_MAXINT, 0,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_SELECTION_MODEL,
        g_param_spec_object (
            "selection_model",
            "Selection model",
            "Selection model",
            E_TYPE_SELECTION_MODEL,
            G_PARAM_WRITABLE));

    g_object_class_install_property (
        object_class,
        PROP_HEIGHT,
        g_param_spec_double (
            "height",
            "Height",
            "Height",
            0.0, G_MAXDOUBLE, 0.0,
            G_PARAM_READABLE));

    g_object_class_install_property (
        object_class,
        PROP_WIDTH,
        g_param_spec_double (
            "width",
            "Width",
            "Width",
            0.0, G_MAXDOUBLE, 0.0,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_MINIMUM_WIDTH,
        g_param_spec_double (
            "minimum_width",
            "Minimum width",
            "Minimum Width",
            0.0, G_MAXDOUBLE, 0.0,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_FROZEN,
        g_param_spec_boolean (
            "frozen",
            "Frozen",
            "Frozen",
            FALSE,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_UNIFORM_ROW_HEIGHT,
        g_param_spec_boolean (
            "uniform_row_height",
            "Uniform row height",
            "Uniform row height",
            FALSE,
            G_PARAM_READWRITE));
}

static void
e_table_group_leaf_init (ETableGroupLeaf *etgl)
{
    etgl->width = 1;
    etgl->height = 1;
    etgl->minimum_width = 0;

    etgl->ets = NULL;
    etgl->item = NULL;

    etgl->etgl_cursor_change_id = 0;
    etgl->etgl_cursor_activated_id = 0;
    etgl->etgl_double_click_id = 0;
    etgl->etgl_right_click_id = 0;
    etgl->etgl_click_id = 0;
    etgl->etgl_key_press_id = 0;
    etgl->etgl_start_drag_id = 0;

    etgl->alternating_row_colors = 1;
    etgl->horizontal_draw_grid = 1;
    etgl->vertical_draw_grid = 1;
    etgl->draw_focus = 1;
    etgl->cursor_mode = E_CURSOR_SIMPLE;
    etgl->length_threshold = -1;

    etgl->selection_model = NULL;
    etgl->uniform_row_height = FALSE;

    e_canvas_item_set_reflow_callback (GNOME_CANVAS_ITEM (etgl), etgl_reflow);
}