path: root/calendar/gui/e-week-view-titles-item.c

/*
 * EWeekViewTitlesItem - displays the 'Monday', 'Tuesday' etc. at the top of
 * the Month calendar view.
 *
 * 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:
 *      Damon Chaplin <damon@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 */

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

#include <string.h>
#include <e-util/e-util.h>
#include "e-week-view-titles-item.h"

#define E_WEEK_VIEW_TITLES_ITEM_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_WEEK_VIEW_TITLES_ITEM, EWeekViewTitlesItemPrivate))

struct _EWeekViewTitlesItemPrivate {
    EWeekView *week_view;
};

enum {
    PROP_0,
    PROP_WEEK_VIEW
};

G_DEFINE_TYPE (
    EWeekViewTitlesItem,
    e_week_view_titles_item,
    GNOME_TYPE_CANVAS_ITEM)

static void
week_view_titles_item_set_property (GObject *object,
                                    guint property_id,
                                    const GValue *value,
                                    GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_WEEK_VIEW:
            e_week_view_titles_item_set_week_view (
                E_WEEK_VIEW_TITLES_ITEM (object),
                g_value_get_object (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
week_view_titles_item_get_property (GObject *object,
                                    guint property_id,
                                    GValue *value,
                                    GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_WEEK_VIEW:
            g_value_set_object (
                value,
                e_week_view_titles_item_get_week_view (
                E_WEEK_VIEW_TITLES_ITEM (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
week_view_titles_item_dispose (GObject *object)
{
    EWeekViewTitlesItemPrivate *priv;

    priv = E_WEEK_VIEW_TITLES_ITEM_GET_PRIVATE (object);

    if (priv->week_view != NULL) {
        g_object_unref (priv->week_view);
        priv->week_view = NULL;
    }

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

static void
week_view_titles_item_update (GnomeCanvasItem *item,
                              const cairo_matrix_t *i2c,
                              gint flags)
{
    GnomeCanvasItemClass *canvas_item_class;

    /* Chain up to parent's update() method. */
    canvas_item_class =
        GNOME_CANVAS_ITEM_CLASS (e_week_view_titles_item_parent_class);
    canvas_item_class->update (item, i2c, flags);

    /* The item covers the entire canvas area. */
    item->x1 = 0;
    item->y1 = 0;
    item->x2 = INT_MAX;
    item->y2 = INT_MAX;
}

static void
week_view_titles_item_draw (GnomeCanvasItem *canvas_item,
                            cairo_t *cr,
                            gint x,
                            gint y,
                            gint width,
                            gint height)
{
    EWeekViewTitlesItem *titles_item;
    EWeekView *week_view;
    GtkStyle *style;
    gint col_width, col, date_width, date_x;
    gchar buffer[128];
    GtkAllocation allocation;
    gboolean abbreviated;
    gboolean compress_weekend;
    GDateWeekday weekday;
    PangoLayout *layout;

    titles_item = E_WEEK_VIEW_TITLES_ITEM (canvas_item);
    week_view = e_week_view_titles_item_get_week_view (titles_item);
    g_return_if_fail (week_view != NULL);

    compress_weekend = e_week_view_get_compress_weekend (week_view);

    cairo_save (cr);
    cairo_set_line_width (cr, 1.0);

    gtk_widget_get_allocation (
        GTK_WIDGET (canvas_item->canvas), &allocation);

    style = gtk_widget_get_style (GTK_WIDGET (week_view));
    layout = gtk_widget_create_pango_layout (GTK_WIDGET (week_view), NULL);

    /* Draw the shadow around the dates. */
    gdk_cairo_set_source_color (cr, &style->light[GTK_STATE_NORMAL]);
    cairo_move_to (cr, 1.5 - x, 1.5 - y);
    cairo_rel_line_to (cr, allocation.width - 1, 0);
    cairo_move_to (cr, 1.5 - x, 2.5 - y);
    cairo_rel_line_to (cr, 0, allocation.height - 1);
    cairo_stroke (cr);

    gdk_cairo_set_source_color (cr, &style->dark[GTK_STATE_NORMAL]);
    cairo_rectangle (cr, 0.5 - x, 0.5 - y, allocation.width - 1, allocation.height);
    cairo_stroke (cr);

    /* Determine the format to use. */
    col_width = allocation.width / week_view->columns;
    abbreviated = (week_view->max_day_width + 2 >= col_width);

    /* Shift right one pixel to account for the shadow around the main
     * canvas. */
    x--;

    /* Draw the date. Set a clipping rectangle so we don't draw over the
     * next day. */
    weekday = e_week_view_get_display_start_day (week_view);
    for (col = 0; col < week_view->columns; col++) {
        if (weekday == G_DATE_SATURDAY && compress_weekend)
            g_snprintf (
                buffer, sizeof (buffer), "%s/%s",
                e_get_weekday_name (G_DATE_SATURDAY, TRUE),
                e_get_weekday_name (G_DATE_SUNDAY, TRUE));
        else
            g_snprintf (
                buffer, sizeof (buffer), "%s",
                e_get_weekday_name (weekday, abbreviated));

        cairo_save (cr);

        cairo_rectangle (
            cr,
            week_view->col_offsets[col] - x, 2 - y,
            week_view->col_widths[col], allocation.height - 2);
        cairo_clip (cr);

        if (weekday == G_DATE_SATURDAY && compress_weekend)
            date_width = week_view->abbr_day_widths[5]
                + week_view->slash_width
                + week_view->abbr_day_widths[6];
        else if (abbreviated)
            date_width = week_view->abbr_day_widths[weekday];
        else
            date_width = week_view->day_widths[weekday];

        date_x = week_view->col_offsets[col]
            + (week_view->col_widths[col] - date_width) / 2;
        date_x = MAX (date_x, week_view->col_offsets[col]);

        pango_layout_set_text (layout, buffer, -1);
        cairo_move_to (cr, date_x - x, 3 - y);
        pango_cairo_show_layout (cr, layout);

        cairo_restore (cr);

        /* Draw the lines down the left and right of the date cols. */
        if (col != 0) {
            gdk_cairo_set_source_color (cr, &style->light[GTK_STATE_NORMAL]);
            cairo_move_to (cr, week_view->col_offsets[col] - x + 0.5, 4.5 - y);
            cairo_rel_line_to (cr, 0, allocation.height - 8);
            cairo_stroke (cr);

            gdk_cairo_set_source_color (cr, &style->dark[GTK_STATE_NORMAL]);
            cairo_move_to (cr, week_view->col_offsets[col] - x - 0.5, 4.5 - y);
            cairo_rel_line_to (cr, 0, allocation.height - 8);
            cairo_stroke (cr);
        }

        /* Draw the lines between each column. */
        if (col != 0) {
            cairo_set_source_rgb (cr, 0, 0, 0);
            cairo_rectangle (
                cr, week_view->col_offsets[col] - x,
                allocation.height - y, 1, 1);
            cairo_fill (cr);
        }

        weekday = e_weekday_get_next (weekday);
        if (weekday == G_DATE_SUNDAY && compress_weekend)
            weekday = e_weekday_get_next (weekday);
    }

    g_object_unref (layout);
    cairo_restore (cr);
}

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

static void
e_week_view_titles_item_class_init (EWeekViewTitlesItemClass *class)
{
    GObjectClass  *object_class;
    GnomeCanvasItemClass *item_class;

    g_type_class_add_private (class, sizeof (EWeekViewTitlesItemPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = week_view_titles_item_set_property;
    object_class->get_property = week_view_titles_item_get_property;
    object_class->dispose = week_view_titles_item_dispose;

    item_class = GNOME_CANVAS_ITEM_CLASS (class);
    item_class->update = week_view_titles_item_update;
    item_class->draw = week_view_titles_item_draw;
    item_class->point = week_view_titles_item_point;

    g_object_class_install_property (
        object_class,
        PROP_WEEK_VIEW,
        g_param_spec_object (
            "week-view",
            "Week View",
            NULL,
            E_TYPE_WEEK_VIEW,
            G_PARAM_READWRITE));
}

static void
e_week_view_titles_item_init (EWeekViewTitlesItem *titles_item)
{
    titles_item->priv = E_WEEK_VIEW_TITLES_ITEM_GET_PRIVATE (titles_item);
}

EWeekView *
e_week_view_titles_item_get_week_view (EWeekViewTitlesItem *titles_item)
{
    g_return_val_if_fail (E_IS_WEEK_VIEW_TITLES_ITEM (titles_item), NULL);

    return titles_item->priv->week_view;
}

void
e_week_view_titles_item_set_week_view (EWeekViewTitlesItem *titles_item,
                                       EWeekView *week_view)
{
    g_return_if_fail (E_IS_WEEK_VIEW_TITLES_ITEM (titles_item));
    g_return_if_fail (E_IS_WEEK_VIEW (week_view));

    if (titles_item->priv->week_view == week_view)
        return;

    if (titles_item->priv->week_view != NULL)
        g_object_unref (titles_item->priv->week_view);

    titles_item->priv->week_view = g_object_ref (week_view);

    g_object_notify (G_OBJECT (titles_item), "week-view");
}