path: root/widgets/table/e-cell-pixbuf.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:
 *      Vladimir Vukicevic <vladimir@ximian.com>
 *
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#include <config.h>

#include <stdio.h>

#include <libgnomecanvas/libgnomecanvas.h>

#include <glib/gi18n.h>
#include <gtk/gtk.h>
#include "e-cell-pixbuf.h"

G_DEFINE_TYPE (ECellPixbuf, e_cell_pixbuf, E_CELL_TYPE)

typedef struct _ECellPixbufView ECellPixbufView;

struct _ECellPixbufView {
    ECellView cell_view;
    GnomeCanvas *canvas;
};

/* Object argument IDs */
enum {
    PROP_0,

    PROP_SELECTED_COLUMN,
    PROP_FOCUSED_COLUMN,
    PROP_UNSELECTED_COLUMN
};

/*
 * ECellPixbuf functions
 */

ECell *
e_cell_pixbuf_new (void)
{
    ECellPixbuf *ecp;

    ecp = g_object_new (E_CELL_PIXBUF_TYPE, NULL);
    e_cell_pixbuf_construct (ecp);

    return (ECell *) ecp;
}

void
e_cell_pixbuf_construct (ECellPixbuf *ecp)
{
    /* noop */
    return;
}

/*
 * ECell methods
 */

static ECellView *
pixbuf_new_view (ECell *ecell, ETableModel *table_model, gpointer e_table_item_view)
{
    ECellPixbufView *pixbuf_view = g_new0 (ECellPixbufView, 1);
    ETableItem *eti = E_TABLE_ITEM (e_table_item_view);
    GnomeCanvas *canvas = GNOME_CANVAS_ITEM (eti)->canvas;

    pixbuf_view->cell_view.ecell = ecell;
    pixbuf_view->cell_view.e_table_model = table_model;
    pixbuf_view->cell_view.e_table_item_view = e_table_item_view;
    pixbuf_view->cell_view.kill_view_cb = NULL;
    pixbuf_view->cell_view.kill_view_cb_data = NULL;

    pixbuf_view->canvas = canvas;

    return (ECellView *) pixbuf_view;
}

static void
pixbuf_kill_view (ECellView *ecell_view)
{
    ECellPixbufView *pixbuf_view = (ECellPixbufView *) ecell_view;

    if (pixbuf_view->cell_view.kill_view_cb)
        pixbuf_view->cell_view.kill_view_cb (
            ecell_view, pixbuf_view->cell_view.kill_view_cb_data);

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

    g_free (pixbuf_view);
}

static void
pixbuf_draw (ECellView *ecell_view, GdkDrawable *drawable,
             gint model_col, gint view_col, gint row, ECellFlags flags,
             gint x1, gint y1, gint x2, gint y2)
{
    GdkPixbuf *cell_pixbuf;
    gint real_x, real_y;
    gint pix_w, pix_h;
    cairo_t *cr;

    cell_pixbuf = e_table_model_value_at (ecell_view->e_table_model,
                              1, row);

    /* we can't make sure we really got a pixbuf since, well, it's a Gdk thing */

    if (x2 - x1 == 0)
        return;

    if (!cell_pixbuf)
    return;

    pix_w = gdk_pixbuf_get_width (cell_pixbuf);
    pix_h = gdk_pixbuf_get_height (cell_pixbuf);

    /* We center the pixbuf within our allocated space */
    if (x2 - x1 > pix_w) {
        gint diff = (x2 - x1) - pix_w;
        real_x = x1 + diff/2;
    } else {
        real_x = x1;
    }

    if (y2 - y1 > pix_h) {
        gint diff = (y2 - y1) - pix_h;
        real_y = y1 + diff/2;
    } else {
        real_y = y1;
    }

    cr = gdk_cairo_create (drawable);
    cairo_save (cr);
    gdk_cairo_set_source_pixbuf (cr, cell_pixbuf, real_x, real_y);
    cairo_paint_with_alpha (cr, 1);
    cairo_restore (cr);
    cairo_destroy (cr);
}

static gint
pixbuf_event (ECellView *ecell_view, GdkEvent *event,
              gint model_col, gint view_col, gint row,
              ECellFlags flags, ECellActions *actions)
{
    /* noop */

    return FALSE;
}

static gint
pixbuf_height (ECellView *ecell_view, gint model_col, gint view_col, gint row)
{
    GdkPixbuf *pixbuf;
    if (row == -1) {
      if (e_table_model_row_count (ecell_view->e_table_model) > 0) {
        row = 0;
      } else {
    return 6;
      }
    }

    pixbuf = (GdkPixbuf *) e_table_model_value_at (ecell_view->e_table_model, 1, row);
    if (!pixbuf)
        return 0;

    /* We give ourselves 3 pixels of padding on either side */
    return gdk_pixbuf_get_height (pixbuf) + 6;
}

/*
 * ECell::print method
 */
static void
pixbuf_print (ECellView *ecell_view, GtkPrintContext *context,
          gint model_col, gint view_col, gint row,
          gdouble width, gdouble height)
{
    GdkPixbuf *pixbuf;
    gint scale;
    cairo_t *cr = gtk_print_context_get_cairo_context (context);

    pixbuf = (GdkPixbuf *) e_table_model_value_at (ecell_view->e_table_model, 1, row);
    if (pixbuf == NULL)
        return;

    scale = gdk_pixbuf_get_height (pixbuf);
    cairo_save (cr);
    cairo_translate (cr, 0, (gdouble)(height - scale) / (gdouble)2);
    gdk_cairo_set_source_pixbuf (cr, pixbuf, (gdouble)scale, (gdouble)scale);
    cairo_paint (cr);
    cairo_restore (cr);
}

static gdouble
pixbuf_print_height (ECellView *ecell_view, GtkPrintContext *context,
             gint model_col, gint view_col, gint row,
             gdouble width)
{
    GdkPixbuf *pixbuf;

    if (row == -1) {
        if (e_table_model_row_count (ecell_view->e_table_model) > 0) {
            row = 0;
        } else {
            return 6;
        }
    }

    pixbuf = (GdkPixbuf *) e_table_model_value_at (ecell_view->e_table_model, 1, row);
    if (!pixbuf)
        return 0;

    /* We give ourselves 3 pixels of padding on either side */
    return gdk_pixbuf_get_height (pixbuf);
}

static gint
pixbuf_max_width (ECellView *ecell_view, gint model_col, gint view_col)
{
    gint pw;
    gint num_rows, i;
    gint max_width = -1;

    if (model_col == 0) {
        num_rows = e_table_model_row_count (ecell_view->e_table_model);

        for (i = 0; i <= num_rows; i++) {
            GdkPixbuf *pixbuf = (GdkPixbuf *) e_table_model_value_at
                (ecell_view->e_table_model,
                 1,
                 i);
           if (!pixbuf)
               continue;
            pw = gdk_pixbuf_get_width (pixbuf);
            if (max_width < pw)
                max_width = pw;
        }
    } else {
        return -1;
    }

    return max_width;
}

static void
pixbuf_dispose (GObject *object)
{
    if (G_OBJECT_CLASS (e_cell_pixbuf_parent_class)->dispose)
        (* G_OBJECT_CLASS (e_cell_pixbuf_parent_class)->dispose) (object);
}

static void
pixbuf_set_property (GObject *object,
             guint prop_id,
             const GValue *value,
             GParamSpec *pspec)
{
    ECellPixbuf *pixbuf;

    pixbuf = E_CELL_PIXBUF (object);

    switch (prop_id) {
    case PROP_SELECTED_COLUMN:
        pixbuf->selected_column = g_value_get_int (value);
        break;

    case PROP_FOCUSED_COLUMN:
        pixbuf->focused_column = g_value_get_int (value);
        break;

    case PROP_UNSELECTED_COLUMN:
        pixbuf->unselected_column = g_value_get_int (value);
        break;

    default:
        return;
    }
}

/* Get_arg handler for the pixbuf item */
static void
pixbuf_get_property (GObject *object,
             guint prop_id,
             GValue *value,
             GParamSpec *pspec)
{
    ECellPixbuf *pixbuf;

    pixbuf = E_CELL_PIXBUF (object);

    switch (prop_id) {
    case PROP_SELECTED_COLUMN:
        g_value_set_int (value, pixbuf->selected_column);
        break;

    case PROP_FOCUSED_COLUMN:
        g_value_set_int (value, pixbuf->focused_column);
        break;

    case PROP_UNSELECTED_COLUMN:
        g_value_set_int (value, pixbuf->unselected_column);
        break;

    default:
        G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
        break;
    }
}

static void
e_cell_pixbuf_init (ECellPixbuf *ecp)
{
    ecp->selected_column = -1;
    ecp->focused_column = -1;
    ecp->unselected_column = -1;
}

static void
e_cell_pixbuf_class_init (ECellPixbufClass *klass)
{
    GObjectClass *object_class = G_OBJECT_CLASS (klass);
    ECellClass *ecc = E_CELL_CLASS (klass);

    object_class->dispose = pixbuf_dispose;
    object_class->set_property = pixbuf_set_property;
    object_class->get_property = pixbuf_get_property;

    ecc->new_view = pixbuf_new_view;
    ecc->kill_view = pixbuf_kill_view;
    ecc->draw = pixbuf_draw;
    ecc->event = pixbuf_event;
    ecc->height = pixbuf_height;
    ecc->print = pixbuf_print;
    ecc->print_height = pixbuf_print_height;
    ecc->max_width = pixbuf_max_width;

    g_object_class_install_property (object_class, PROP_SELECTED_COLUMN,
                     g_param_spec_int ("selected_column",
                               "Selected Column",
                               NULL,
                               0, G_MAXINT, 0,
                               G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_FOCUSED_COLUMN,
                     g_param_spec_int ("focused_column",
                               "Focused Column",
                               NULL,
                               0, G_MAXINT, 0,
                               G_PARAM_READWRITE));

    g_object_class_install_property (object_class, PROP_UNSELECTED_COLUMN,
                     g_param_spec_int ("unselected_column",
                               "Unselected Column",
                               NULL,
                               0, G_MAXINT, 0,
                               G_PARAM_READWRITE));
}