path: root/widgets/table/e-cell-vbox.c

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

#include <config.h>

#include <ctype.h>
#include <math.h>
#include <stdio.h>

#include <gtk/gtk.h>

#include "a11y/e-table/gal-a11y-e-cell-registry.h"
#include "a11y/e-table/gal-a11y-e-cell-vbox.h"
#include "e-util/e-util.h"

#include "e-cell-vbox.h"
#include "e-table-item.h"

#define PARENT_TYPE e_cell_get_type ()

static ECellClass *parent_class;

#define INDENT_AMOUNT 16

/*
 * ECell::new_view method
 */
static ECellView *
ecv_new_view (ECell *ecell, ETableModel *table_model, void *e_table_item_view)
{
    ECellVbox *ecv = E_CELL_VBOX (ecell);
    ECellVboxView *vbox_view = g_new0 (ECellVboxView, 1);
    int i;
    
    vbox_view->cell_view.ecell = ecell;
    vbox_view->cell_view.e_table_model = table_model;
    vbox_view->cell_view.e_table_item_view = e_table_item_view;
        vbox_view->cell_view.kill_view_cb = NULL;
        vbox_view->cell_view.kill_view_cb_data = NULL;
    
    /* create our subcell view */
    vbox_view->subcell_view_count = ecv->subcell_count;
    vbox_view->subcell_views = g_new (ECellView *, vbox_view->subcell_view_count);
    vbox_view->model_cols = g_new (int, vbox_view->subcell_view_count);

    for (i = 0; i < vbox_view->subcell_view_count; i++) {
        vbox_view->subcell_views[i] = e_cell_new_view (ecv->subcells[i], table_model, e_table_item_view /* XXX */);
        vbox_view->model_cols[i] = ecv->model_cols[i];
    }

    return (ECellView *)vbox_view;
}

/*
 * ECell::kill_view method
 */
static void
ecv_kill_view (ECellView *ecv)
{
    ECellVboxView *vbox_view = (ECellVboxView *) ecv;
    int i;

        if (vbox_view->cell_view.kill_view_cb)
            (vbox_view->cell_view.kill_view_cb)(ecv, vbox_view->cell_view.kill_view_cb_data);

        if (vbox_view->cell_view.kill_view_cb_data)
            g_list_free(vbox_view->cell_view.kill_view_cb_data);

    /* kill our subcell view */
    for (i = 0; i < vbox_view->subcell_view_count; i++)
        e_cell_kill_view (vbox_view->subcell_views[i]);

    g_free (vbox_view->model_cols);
    g_free (vbox_view->subcell_views);
    g_free (vbox_view);
}

/*
 * ECell::realize method
 */
static void
ecv_realize (ECellView *ecell_view)
{
    ECellVboxView *vbox_view = (ECellVboxView *) ecell_view;
    int i;

    /* realize our subcell view */
    for (i = 0; i < vbox_view->subcell_view_count; i++)
        e_cell_realize (vbox_view->subcell_views[i]);

    if (parent_class->realize)
        (* parent_class->realize) (ecell_view);
}

/*
 * ECell::unrealize method
 */
static void
ecv_unrealize (ECellView *ecv)
{
    ECellVboxView *vbox_view = (ECellVboxView *) ecv;
    int i;

    /* unrealize our subcell view. */
    for (i = 0; i < vbox_view->subcell_view_count; i++)
        e_cell_unrealize (vbox_view->subcell_views[i]);

    if (parent_class->unrealize)
        (* parent_class->unrealize) (ecv);
}

/*
 * ECell::draw method
 */
static void
ecv_draw (ECellView *ecell_view, GdkDrawable *drawable,
      int model_col, int view_col, int row, ECellFlags flags,
      int x1, int y1, int x2, int y2)
{
    ECellVboxView *vbox_view = (ECellVboxView *)ecell_view;

    int subcell_offset = 0;
    int i;

    for (i = 0; i < vbox_view->subcell_view_count; i++) {
        /* Now cause our subcells to draw their contents,
           shifted by subcell_offset pixels */
        int height = e_cell_height (vbox_view->subcell_views[i], vbox_view->model_cols[i], view_col, row);
        e_cell_draw (vbox_view->subcell_views[i], drawable,
                 vbox_view->model_cols[i], view_col, row, flags,
                 x1, y1 + subcell_offset, x2, y1 + subcell_offset + height);

        subcell_offset += e_cell_height (vbox_view->subcell_views[i], vbox_view->model_cols[i], view_col, row);
    }
}

/*
 * ECell::event method
 */
static gint
ecv_event (ECellView *ecell_view, GdkEvent *event, int model_col, int view_col, int row, ECellFlags flags, ECellActions *actions)
{
    ECellVboxView *vbox_view = (ECellVboxView *)ecell_view;
    int y = 0;
    int i;
    int subcell_offset = 0;

    switch (event->type) {
    case GDK_BUTTON_PRESS:
    case GDK_BUTTON_RELEASE:
    case GDK_2BUTTON_PRESS:
    case GDK_3BUTTON_PRESS:
        y = event->button.y;
        break;
    case GDK_MOTION_NOTIFY:
        y = event->motion.y;
        break;
    default:
        /* nada */
        break;
    }


    for (i = 0; i < vbox_view->subcell_view_count; i++) {
        int height = e_cell_height (vbox_view->subcell_views[i], vbox_view->model_cols[i], view_col, row);
        if (y < subcell_offset + height)
            return e_cell_event(vbox_view->subcell_views[i], event, vbox_view->model_cols[i], view_col, row, flags, actions);
        subcell_offset += height;
    }
    return 0;
}

/*
 * ECell::height method
 */
static int
ecv_height (ECellView *ecell_view, int model_col, int view_col, int row) 
{
    ECellVboxView *vbox_view = (ECellVboxView *)ecell_view;
    int height = 0;
    int i;

    for (i = 0; i < vbox_view->subcell_view_count; i++) {
        height += e_cell_height (vbox_view->subcell_views[i], vbox_view->model_cols[i], view_col, row);
    }
    return height;
}

/*
 * ECell::max_width method
 */
static int
ecv_max_width (ECellView *ecell_view, int model_col, int view_col)
{
    ECellVboxView *vbox_view = (ECellVboxView *)ecell_view;
    int max_width = 0;
    int i;

    for (i = 0; i < vbox_view->subcell_view_count; i++) {
        int width = e_cell_max_width (vbox_view->subcell_views[i], vbox_view->model_cols[i], view_col);
        max_width = MAX(width, max_width);
    }

    return max_width;
}

#if 0
/*
 * ECellView::show_tooltip method
 */
static void
ecv_show_tooltip (ECellView *ecell_view, int model_col, int view_col, int row,
          int col_width, ETableTooltip *tooltip)
{       
    ECellVboxView *vbox_view = (ECellVboxView *) ecell_view;
    EVboxModel *vbox_model = e_cell_vbox_get_vbox_model (ecell_view->e_table_model, row);
    EVboxPath node = e_cell_vbox_get_node (ecell_view->e_table_model, row);
    int offset = offset_of_node (ecell_view->e_table_model, row);
    GdkPixbuf *node_image;

    node_image = e_vbox_model_icon_at (vbox_model, node);
    if (node_image)
        offset += gdk_pixbuf_get_width (node_image);

    tooltip->x += offset;
    e_cell_show_tooltip (vbox_view->subcell_view, model_col, view_col, row, col_width - offset, tooltip);
}

/*
 * ECellView::get_bg_color method
 */
static char *
ecv_get_bg_color (ECellView *ecell_view, int row)
{       
    ECellVboxView *vbox_view = (ECellVboxView *) ecell_view;

    return e_cell_get_bg_color (vbox_view->subcell_views[0], row);
}
        
/*
 * ECellView::enter_edit method
 */
static void *
ecv_enter_edit (ECellView *ecell_view, int model_col, int view_col, int row)
{
    /* just defer to our subcell's view */
    ECellVboxView *vbox_view = (ECellVboxView *) ecell_view;

    return e_cell_enter_edit (vbox_view->subcell_view, model_col, view_col, row);
}

/*
 * ECellView::leave_edit method
 */
static void
ecv_leave_edit (ECellView *ecell_view, int model_col, int view_col, int row, void *edit_context)
{
    /* just defer to our subcell's view */
    ECellVboxView *vbox_view = (ECellVboxView *) ecell_view;

    e_cell_leave_edit (vbox_view->subcell_view, model_col, view_col, row, edit_context);
}

static void
ecv_print (ECellView *ecell_view, GnomePrintContext *context, 
       int model_col, int view_col, int row,
       double width, double height)
{
    ECellVboxView *vbox_view = (ECellVboxView *) ecell_view;

    if (/* XXX only if we're the active sort */ TRUE) {
        EVboxModel *vbox_model = e_cell_vbox_get_vbox_model (ecell_view->e_table_model, row);
        EVboxTableAdapter *vbox_table_adapter = e_cell_vbox_get_vbox_table_adapter(ecell_view->e_table_model, row);
        EVboxPath node = e_cell_vbox_get_node (ecell_view->e_table_model, row);
        int offset = offset_of_node (ecell_view->e_table_model, row);
        int subcell_offset = offset;
        gboolean expandable = e_vbox_model_node_is_expandable (vbox_model, node);
        gboolean expanded = e_vbox_table_adapter_node_is_expanded (vbox_table_adapter, node);

        /* draw our lines */
        if (E_CELL_VBOX(vbox_view->cell_view.ecell)->draw_lines) {
            int depth;

            if (!e_vbox_model_node_is_root (vbox_model, node)
                || e_vbox_model_node_get_children (vbox_model, node, NULL) > 0) {
                gnome_print_moveto (context,
                            offset - INDENT_AMOUNT / 2,
                            height / 2);

                gnome_print_lineto (context,
                            offset,
                            height / 2);
            }

            if (visible_depth_of_node (ecell_view->e_table_model, row) != 0) {
                gnome_print_moveto (context,
                            offset - INDENT_AMOUNT / 2,
                            height);
                gnome_print_lineto (context,
                            offset - INDENT_AMOUNT / 2,
                            (e_vbox_model_node_get_next (vbox_model, node)
                             ? 0
                             : height / 2));
            }

            /* now traverse back up to the root of the vbox, checking at
               each level if the node has siblings, and drawing the
               correct vertical pipe for it's configuration. */
            node = e_vbox_model_node_get_parent (vbox_model, node);
            depth = visible_depth_of_node (ecell_view->e_table_model, row) - 1;
            offset -= INDENT_AMOUNT;
            while (node && depth != 0) {
                if (e_vbox_model_node_get_next(vbox_model, node)) {
                    gnome_print_moveto (context,
                                offset - INDENT_AMOUNT / 2,
                                height);
                    gnome_print_lineto (context,
                                offset - INDENT_AMOUNT / 2,
                                0);
                }
                node = e_vbox_model_node_get_parent (vbox_model, node);
                depth --;
                offset -= INDENT_AMOUNT;
            }
        }

        /* now draw our icon if we're expandable */
        if (expandable) {
            double image_matrix [6] = {16, 0, 0, 16, 0, 0};
            GdkPixbuf *image = (expanded 
                        ? E_CELL_VBOX(vbox_view->cell_view.ecell)->open_pixbuf
                        : E_CELL_VBOX(vbox_view->cell_view.ecell)->closed_pixbuf);
            int image_width, image_height, image_rowstride;
            guchar *image_pixels;

            image_width = gdk_pixbuf_get_width(image);
            image_height = gdk_pixbuf_get_height(image);
            image_pixels = gdk_pixbuf_get_pixels(image);
            image_rowstride = gdk_pixbuf_get_rowstride(image);

            image_matrix [4] = subcell_offset - INDENT_AMOUNT / 2 - image_width / 2;
            image_matrix [5] = height / 2 - image_height / 2;

            gnome_print_gsave (context);
            gnome_print_concat (context, image_matrix);

            gnome_print_rgbaimage (context, image_pixels, image_width, image_height, image_rowstride);
            gnome_print_grestore (context);
        }

        gnome_print_stroke (context);

        if (gnome_print_translate(context, subcell_offset, 0) == -1)
                /* FIXME */;
        width -= subcell_offset;
    }


    e_cell_print (vbox_view->subcell_view, context, model_col, view_col, row, width, height);
}

static gdouble
ecv_print_height (ECellView *ecell_view, GnomePrintContext *context, 
          int model_col, int view_col, int row,
          double width)
{
    return 12; /* XXX */
}
#endif

/*
 * GObject::dispose method
 */
static void
ecv_dispose (GObject *object)
{
    ECellVbox *ecv = E_CELL_VBOX (object);
    int i;

    /* destroy our subcell */
    for (i = 0; i < ecv->subcell_count; i++)
        if (ecv->subcells[i])
            g_object_unref (ecv->subcells[i]);
    g_free (ecv->subcells);
    ecv->subcells = NULL;
    ecv->subcell_count = 0;

    G_OBJECT_CLASS (parent_class)->dispose (object);
}

static void
e_cell_vbox_class_init (GObjectClass *object_class)
{
    ECellClass *ecc = (ECellClass *) object_class;

    object_class->dispose = ecv_dispose;

    ecc->new_view         = ecv_new_view;
    ecc->kill_view        = ecv_kill_view;
    ecc->realize          = ecv_realize;
    ecc->unrealize        = ecv_unrealize;
    ecc->draw             = ecv_draw;
    ecc->event            = ecv_event;
    ecc->height           = ecv_height;
#if 0
    ecc->enter_edit       = ecv_enter_edit;
    ecc->leave_edit       = ecv_leave_edit;
    ecc->print            = ecv_print;
    ecc->print_height     = ecv_print_height;
#endif
    ecc->max_width        = ecv_max_width;
#if 0
    ecc->show_tooltip     = ecv_show_tooltip;
    ecc->get_bg_color     = ecv_get_bg_color;
#endif

    parent_class = g_type_class_ref (PARENT_TYPE);

    gal_a11y_e_cell_registry_add_cell_type (NULL, E_CELL_VBOX_TYPE, gal_a11y_e_cell_vbox_new);
}

static void
e_cell_vbox_init (GtkObject *object)
{
    ECellVbox *ecv = E_CELL_VBOX (object);

    ecv->subcells = NULL;
    ecv->subcell_count = 0;
}

E_MAKE_TYPE(e_cell_vbox, "ECellVbox", ECellVbox, e_cell_vbox_class_init, e_cell_vbox_init, PARENT_TYPE)

/**
 * e_cell_vbox_new:
 * 
 * Creates a new ECell renderer that can be used to render multiple
 * child cells.
 * 
 * Return value: an ECell object that can be used to render multiple
 * child cells.
 **/
ECell *
e_cell_vbox_new (void)
{
    ECellVbox *ecv = g_object_new (E_CELL_VBOX_TYPE, NULL);

    return (ECell *) ecv;
}

void
e_cell_vbox_append (ECellVbox *vbox, ECell *subcell, int model_col)
{
    vbox->subcell_count ++;

    vbox->subcells   = g_renew (ECell *, vbox->subcells,   vbox->subcell_count);
    vbox->model_cols = g_renew (int,     vbox->model_cols, vbox->subcell_count);

    vbox->subcells[vbox->subcell_count - 1]   = subcell;
    vbox->model_cols[vbox->subcell_count - 1] = model_col;

    if (subcell)
        g_object_ref (subcell);
}