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/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 * E-Table-Group.c: Implements the grouping objects for elements on a table
 *
 * Author:
 *   Miguel de Icaza (miguel@ximian.com)
 *   Chris Lahey (clahey@ximian.com)
 *
 * Copyright 1999, 2000 Ximian, Inc.
 */

#include <config.h>
#include <gtk/gtksignal.h>
#include <libgnomeui/gnome-canvas-rect-ellipse.h>
#include "e-table-group.h"
#include "e-table-group-container.h"
#include "e-table-group-leaf.h"
#include "e-table-item.h"
#include "gal/util/e-util.h"

#define PARENT_TYPE gnome_canvas_group_get_type ()

#define ETG_CLASS(e) (E_TABLE_GROUP_CLASS(GTK_OBJECT(e)->klass))

static GnomeCanvasGroupClass *etg_parent_class;

enum {
    CURSOR_CHANGE,
    CURSOR_ACTIVATED,
    DOUBLE_CLICK,
    RIGHT_CLICK,
    CLICK,
    KEY_PRESS,
    START_DRAG,
    LAST_SIGNAL
};

static gint etg_signals [LAST_SIGNAL] = { 0, };

static gboolean etg_get_focus (ETableGroup      *etg);
static void etg_destroy (GtkObject *object);

static void
etg_destroy (GtkObject *object)
{
    ETableGroup *etg = E_TABLE_GROUP(object);

    if (etg->header) {
        gtk_object_unref (GTK_OBJECT(etg->header));
        etg->header = NULL;
    }

    if (etg->full_header) {
        gtk_object_unref (GTK_OBJECT(etg->full_header));
        etg->full_header = NULL;
    }

    if (etg->model) {
        gtk_object_unref (GTK_OBJECT(etg->model));
        etg->model = NULL;
    }

    if (GTK_OBJECT_CLASS (etg_parent_class)->destroy)
        GTK_OBJECT_CLASS (etg_parent_class)->destroy (object);
}

/**
 * e_table_group_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.
 * @n: The grouping information object to group by.
 *
 * %ETableGroup is a collection of rows of an %ETable.  It's a
 * %GnomeCanvasItem.  There are two different forms.  If n < the
 * number of groupings in the given %ETableSortInfo, then the
 * %ETableGroup will need to contain other %ETableGroups, thus it
 * creates an %ETableGroupContainer.  Otherwise, it will just contain
 * an %ETableItem, and thus it creates an %ETableGroupLeaf.
 *
 * Returns: The new %ETableGroup.
 */
ETableGroup *
e_table_group_new (GnomeCanvasGroup *parent,
           ETableHeader     *full_header,
           ETableHeader     *header,
           ETableModel      *model,
           ETableSortInfo   *sort_info,
           int               n)
{
    g_return_val_if_fail (model != NULL, NULL);

    if (n < e_table_sort_info_grouping_get_count(sort_info)) {
        return e_table_group_container_new (parent, full_header, header, model, sort_info, n);
    } else {
        return e_table_group_leaf_new (parent, full_header, header, model, sort_info);
    }
    return NULL;
}

/**
 * e_table_group_construct
 * @parent: The %GnomeCanvasGroup to create a child of.
 * @etg: The %ETableGroup to construct.
 * @full_header: The full header of the %ETable.
 * @header: The current header of the %ETable.
 * @model: The %ETableModel of the %ETable.
 *
 * This routine does the base construction of the %ETableGroup.
 */
void
e_table_group_construct (GnomeCanvasGroup *parent,
             ETableGroup      *etg,
             ETableHeader     *full_header,
             ETableHeader     *header,
             ETableModel      *model)
{
    etg->full_header = full_header;
    gtk_object_ref (GTK_OBJECT(etg->full_header));
    etg->header = header;
    gtk_object_ref (GTK_OBJECT(etg->header));
    etg->model = model;
    gtk_object_ref (GTK_OBJECT(etg->model));
    gnome_canvas_item_constructv (GNOME_CANVAS_ITEM (etg), parent, 0, NULL);
}

/**
 * e_table_group_add
 * @etg: The %ETableGroup to add a row to
 * @row: The row to add.
 *
 * This routine adds the given row from the %ETableModel to this set
 * of rows.
 */
void
e_table_group_add (ETableGroup *etg,
           gint row)
{
    g_return_if_fail (etg != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (etg));

    g_assert (ETG_CLASS (etg)->add != NULL);
    ETG_CLASS (etg)->add (etg, row);
}

/**
 * e_table_group_add_array
 * @etg: The %ETableGroup to add to
 * @array: The array to add.
 * @count: The number of times to add
 *
 * This routine adds all the rows in the array to this set of rows.
 * It assumes that the array is already sorted properly.
 */
void
e_table_group_add_array (ETableGroup *etg,
             const int *array,
             int count)
{
    g_return_if_fail (etg != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (etg));

    g_assert (ETG_CLASS (etg)->add_array != NULL);
    ETG_CLASS (etg)->add_array (etg, array, count);
}

/**
 * e_table_group_add_all
 * @etg: The %ETableGroup to add to
 *
 * This routine adds all the rows from the %ETableModel to this set
 * of rows.
 */
void
e_table_group_add_all (ETableGroup *etg)
{
    g_return_if_fail (etg != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (etg));

    g_assert (ETG_CLASS (etg)->add_all != NULL);
    ETG_CLASS (etg)->add_all (etg);
}

/**
 * e_table_group_remove
 * @etg: The %ETableGroup to remove a row from
 * @row: The row to remove.
 *
 * This routine removes the given row from the %ETableModel from this
 * set of rows.
 *
 * Returns: TRUE if the row was deleted and FALSE if the row was not
 * found.
 */
gboolean
e_table_group_remove (ETableGroup *etg,
              gint row)
{
    g_return_val_if_fail (etg != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_GROUP (etg), FALSE);

    g_assert (ETG_CLASS (etg)->remove != NULL);
    return ETG_CLASS (etg)->remove (etg, row);
}

/**
 * e_table_group_increment
 * @etg: The %ETableGroup to increment
 * @position: The position to increment from
 * @amount: The amount to increment.
 *
 * This routine adds amount to all rows greater than or equal to
 * position.  This is to handle when a row gets inserted into the
 * model.
 */
void
e_table_group_increment (ETableGroup *etg,
             gint position,
             gint amount)
{
    g_return_if_fail (etg != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (etg));

    g_assert (ETG_CLASS (etg)->increment != NULL);
    ETG_CLASS (etg)->increment (etg, position, amount);
}

/**
 * e_table_group_increment
 * @etg: The %ETableGroup to decrement
 * @position: The position to decrement from
 * @amount: The amount to decrement
 *
 * This routine removes amount from all rows greater than or equal to
 * position.  This is to handle when a row gets deleted from the
 * model.
 */
void
e_table_group_decrement (ETableGroup *etg,
             gint position,
             gint amount)
{
    g_return_if_fail (etg != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (etg));

    g_assert (ETG_CLASS (etg)->decrement != NULL);
    ETG_CLASS (etg)->decrement (etg, position, amount);
}

/**
 * e_table_group_increment
 * @etg: The %ETableGroup to count
 *
 * This routine calculates the number of rows shown in this group.
 *
 * Returns: The number of rows.
 */
gint
e_table_group_row_count (ETableGroup *etg)
{
    g_return_val_if_fail (etg != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_GROUP (etg), -1);

    g_assert (ETG_CLASS (etg)->row_count != NULL);
    return ETG_CLASS (etg)->row_count (etg);
}

/**
 * e_table_group_set_focus
 * @etg: The %ETableGroup to set
 * @direction: The direction the focus is coming from.
 * @view_col: The column to set the focus in.
 *
 * Sets the focus to this widget.  Places the focus in the view column
 * coming from direction direction.
 */
void
e_table_group_set_focus (ETableGroup *etg,
             EFocus direction,
             gint view_col)
{
    g_return_if_fail (etg != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (etg));

    g_assert (ETG_CLASS (etg)->set_focus != NULL);
    ETG_CLASS (etg)->set_focus (etg, direction, view_col);
}

/**
 * e_table_group_get_focus
 * @etg: The %ETableGroup to check
 *
 * Calculates if this group has the focus.
 *
 * Returns: TRUE if this group has the focus.
 */
gboolean
e_table_group_get_focus (ETableGroup *etg)
{
    g_return_val_if_fail (etg != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_GROUP (etg), FALSE);

    g_assert (ETG_CLASS (etg)->get_focus != NULL);
    return ETG_CLASS (etg)->get_focus (etg);
}

/**
 * e_table_group_get_focus_column
 * @etg: The %ETableGroup to check
 *
 * Calculates which column in this group has the focus.
 *
 * Returns: The column index (view column).
 */
gint
e_table_group_get_focus_column (ETableGroup *etg)
{
    g_return_val_if_fail (etg != NULL, FALSE);
    g_return_val_if_fail (E_IS_TABLE_GROUP (etg), -1);

    g_assert (ETG_CLASS (etg)->get_focus_column != NULL);
    return ETG_CLASS (etg)->get_focus_column (etg);
}

/**
 * e_table_group_get_printable
 * @etg: %ETableGroup which will be printed
 *
 * This routine creates and returns an %EPrintable that can be used to
 * print the given %ETableGroup.
 *
 * Returns: The %EPrintable.
 */
EPrintable *
e_table_group_get_printable (ETableGroup *etg)
{
    g_return_val_if_fail (etg != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE_GROUP (etg), NULL);

    g_assert (ETG_CLASS (etg)->get_printable != NULL);
    return ETG_CLASS (etg)->get_printable (etg);
}

/**
 * e_table_group_compute_location
 * @eti: %ETableGroup to look in.
 * @x: A pointer to the x location to find in the %ETableGroup.
 * @y: A pointer to the y location to find in the %ETableGroup.
 * @row: A pointer to the location to store the found row in.
 * @col: A pointer to the location to store the found col in.
 *
 * This routine locates the pixel location (*x, *y) in the
 * %ETableGroup.  If that location is in the %ETableGroup, *row and
 * *col are set to the view row and column where it was found.  If
 * that location is not in the %ETableGroup, the height of the
 * %ETableGroup is removed from the value y points to.
 */
void
e_table_group_compute_location (ETableGroup *etg, int *x, int *y, int *row, int *col)
{
    g_return_if_fail (etg != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (etg));

    g_assert (ETG_CLASS (etg)->compute_location != NULL);
    ETG_CLASS (etg)->compute_location (etg, x, y, row, col);
}

/**
 * e_table_group_get_position
 * @eti: %ETableGroup to look in.
 * @x: A pointer to the location to store the found x location in.
 * @y: A pointer to the location to store the found y location in.
 * @row: A pointer to the row number to find.
 * @col: A pointer to the col number to find.
 *
 * This routine finds the view cell (row, col) in the %ETableGroup.
 * If that location is in the %ETableGroup *x and *y are set to the
 * upper left hand corner of the cell found.  If that location is not
 * in the %ETableGroup, the number of rows in the %ETableGroup is
 * removed from the value row points to.
 */
void
e_table_group_get_cell_geometry  (ETableGroup *etg,
                  int         *row,
                  int         *col,
                  int         *x,
                  int         *y,
                  int         *width,
                  int         *height)
{
    g_return_if_fail (etg != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (etg));

    g_assert (ETG_CLASS (etg)->get_cell_geometry != NULL);
    ETG_CLASS (etg)->get_cell_geometry (etg, row, col, x, y, width, height);
}

/**
 * e_table_group_cursor_change
 * @eti: %ETableGroup to emit the signal on
 * @row: The new cursor row (model row)
 *
 * This routine emits the "cursor_change" signal.
 */
void
e_table_group_cursor_change (ETableGroup *e_table_group, gint row)
{
    g_return_if_fail (e_table_group != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (e_table_group));

    gtk_signal_emit (GTK_OBJECT (e_table_group),
             etg_signals [CURSOR_CHANGE],
             row);
}

/**
 * e_table_group_cursor_activated
 * @eti: %ETableGroup to emit the signal on
 * @row: The cursor row (model row)
 *
 * This routine emits the "cursor_activated" signal.
 */
void
e_table_group_cursor_activated (ETableGroup *e_table_group, gint row)
{
    g_return_if_fail (e_table_group != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (e_table_group));

    gtk_signal_emit (GTK_OBJECT (e_table_group),
             etg_signals [CURSOR_ACTIVATED],
             row);
}

/**
 * e_table_group_double_click
 * @eti: %ETableGroup to emit the signal on
 * @row: The row clicked on (model row)
 * @col: The col clicked on (model col)
 * @event: The event that caused this signal
 *
 * This routine emits the "double_click" signal.
 */
void
e_table_group_double_click (ETableGroup *e_table_group, gint row, gint col, GdkEvent *event)
{
    g_return_if_fail (e_table_group != NULL);
    g_return_if_fail (E_IS_TABLE_GROUP (e_table_group));

    gtk_signal_emit (GTK_OBJECT (e_table_group),
             etg_signals [DOUBLE_CLICK],
             row, col, event);
}

/**
 * e_table_group_right_click
 * @eti: %ETableGroup to emit the signal on
 * @row: The row clicked on (model row)
 * @col: The col clicked on (model col)
 * @event: The event that caused this signal
 *
 * This routine emits the "right_click" signal.
 */
gint
e_table_group_right_click (ETableGroup *e_table_group, gint row, gint col, GdkEvent *event)
{
    gint return_val = 0;

    g_return_val_if_fail (e_table_group != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_GROUP (e_table_group), 0);

    gtk_signal_emit (GTK_OBJECT (e_table_group),
             etg_signals [RIGHT_CLICK],
             row, col, event, &return_val);

    return return_val;
}

/**
 * e_table_group_click
 * @eti: %ETableGroup to emit the signal on
 * @row: The row clicked on (model row)
 * @col: The col clicked on (model col)
 * @event: The event that caused this signal
 *
 * This routine emits the "click" signal.
 */
gint
e_table_group_click (ETableGroup *e_table_group, gint row, gint col, GdkEvent *event)
{
    gint return_val = 0;

    g_return_val_if_fail (e_table_group != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_GROUP (e_table_group), 0);

    gtk_signal_emit (GTK_OBJECT (e_table_group),
             etg_signals [CLICK],
             row, col, event, &return_val);

    return return_val;
}

/**
 * e_table_group_key_press
 * @eti: %ETableGroup to emit the signal on
 * @row: The cursor row (model row)
 * @col: The cursor col (model col)
 * @event: The event that caused this signal
 *
 * This routine emits the "key_press" signal.
 */
gint
e_table_group_key_press (ETableGroup *e_table_group, gint row, gint col, GdkEvent *event)
{
    gint return_val = 0;

    g_return_val_if_fail (e_table_group != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_GROUP (e_table_group), 0);

    gtk_signal_emit (GTK_OBJECT (e_table_group),
             etg_signals [KEY_PRESS],
             row, col, event, &return_val);

    return return_val;
}

/**
 * e_table_group_start_drag
 * @eti: %ETableGroup to emit the signal on
 * @row: The cursor row (model row)
 * @col: The cursor col (model col)
 * @event: The event that caused this signal
 *
 * This routine emits the "start_drag" signal.
 */
gint
e_table_group_start_drag (ETableGroup *e_table_group, gint row, gint col, GdkEvent *event)
{
    gint return_val = 0;

    g_return_val_if_fail (e_table_group != NULL, 0);
    g_return_val_if_fail (E_IS_TABLE_GROUP (e_table_group), 0);

    gtk_signal_emit (GTK_OBJECT (e_table_group),
             etg_signals [START_DRAG],
             row, col, event, &return_val);

    return return_val;
}

/**
 * e_table_group_get_header
 * @eti: %ETableGroup to check
 *
 * This routine returns the %ETableGroup's header.
 *
 * Returns: The %ETableHeader.
 */
ETableHeader *
e_table_group_get_header (ETableGroup *etg)
{
    g_return_val_if_fail (etg != NULL, NULL);
    g_return_val_if_fail (E_IS_TABLE_GROUP (etg), NULL);

    return etg->header;
}

static int
etg_event (GnomeCanvasItem *item, GdkEvent *event)
{
    ETableGroup *etg = E_TABLE_GROUP (item);
    gboolean return_val = TRUE;

    switch (event->type) {

    case GDK_FOCUS_CHANGE:
        etg->has_focus = event->focus_change.in;
        return_val = FALSE;

    default:
        return_val = FALSE;
    }
    if (return_val == FALSE){
        if (GNOME_CANVAS_ITEM_CLASS(etg_parent_class)->event)
            return GNOME_CANVAS_ITEM_CLASS(etg_parent_class)->event (item, event);
    }
    return return_val;

}

static gboolean
etg_get_focus (ETableGroup      *etg)
{
    return etg->has_focus;
}

static void
etg_class_init (GtkObjectClass *object_class)
{
    GnomeCanvasItemClass *item_class = (GnomeCanvasItemClass *) object_class;
    ETableGroupClass *klass = (ETableGroupClass *) object_class;

    object_class->destroy = etg_destroy;

    item_class->event = etg_event;

    klass->cursor_change = NULL;
    klass->cursor_activated = NULL;
    klass->double_click = NULL;
    klass->right_click = NULL;
    klass->click = NULL;
    klass->key_press = NULL;
    klass->start_drag = NULL;

    klass->add = NULL;
    klass->add_array = NULL;
    klass->add_all = NULL;
    klass->remove = NULL;
    klass->row_count  = NULL;
    klass->increment  = NULL;
    klass->decrement  = NULL;
    klass->set_focus  = NULL;
    klass->get_focus = etg_get_focus;
    klass->get_printable = NULL;
    klass->compute_location = NULL;
    klass->get_cell_geometry = NULL;

    etg_parent_class = gtk_type_class (PARENT_TYPE);

    etg_signals [CURSOR_CHANGE] =
        gtk_signal_new ("cursor_change",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableGroupClass, cursor_change),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1, GTK_TYPE_INT);

    etg_signals [CURSOR_ACTIVATED] =
        gtk_signal_new ("cursor_activated",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableGroupClass, cursor_activated),
                gtk_marshal_NONE__INT,
                GTK_TYPE_NONE, 1, GTK_TYPE_INT);

    etg_signals [DOUBLE_CLICK] =
        gtk_signal_new ("double_click",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableGroupClass, double_click),
                gtk_marshal_NONE__INT_INT_POINTER,
                GTK_TYPE_NONE, 3, GTK_TYPE_INT, GTK_TYPE_INT, GTK_TYPE_GDK_EVENT);

    etg_signals [RIGHT_CLICK] =
        gtk_signal_new ("right_click",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableGroupClass, right_click),
                e_marshal_INT__INT_INT_POINTER,
                GTK_TYPE_INT, 3, GTK_TYPE_INT, GTK_TYPE_INT, GTK_TYPE_GDK_EVENT);

    etg_signals [CLICK] =
        gtk_signal_new ("click",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableGroupClass, click),
                e_marshal_INT__INT_INT_POINTER,
                GTK_TYPE_INT, 3, GTK_TYPE_INT, GTK_TYPE_INT, GTK_TYPE_GDK_EVENT);

    etg_signals [KEY_PRESS] =
        gtk_signal_new ("key_press",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableGroupClass, key_press),
                e_marshal_INT__INT_INT_POINTER,
                GTK_TYPE_INT, 3, GTK_TYPE_INT, GTK_TYPE_INT, GTK_TYPE_GDK_EVENT);

    etg_signals [START_DRAG] =
        gtk_signal_new ("start_drag",
                GTK_RUN_LAST,
                E_OBJECT_CLASS_TYPE (object_class),
                GTK_SIGNAL_OFFSET (ETableGroupClass, start_drag),
                e_marshal_INT__INT_INT_POINTER,
                GTK_TYPE_INT, 3, GTK_TYPE_INT, GTK_TYPE_INT, GTK_TYPE_GDK_EVENT);

    E_OBJECT_CLASS_ADD_SIGNALS (object_class, etg_signals, LAST_SIGNAL);
}

E_MAKE_TYPE (e_table_group, "ETableGroup", ETableGroup, etg_class_init, NULL, PARENT_TYPE);