path: root/calendar/gui/e-day-view-top-item.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:
 *      Damon Chaplin <damon@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

/*
 * EDayViewTopItem - displays the top part of the Day/Work Week calendar view.
 */

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

#include <glib/gi18n.h>

#include "e-calendar-view.h"
#include "e-day-view-top-item.h"

#define E_DAY_VIEW_TOP_ITEM_GET_PRIVATE(obj) \
    (G_TYPE_INSTANCE_GET_PRIVATE \
    ((obj), E_TYPE_DAY_VIEW_TOP_ITEM, EDayViewTopItemPrivate))

struct _EDayViewTopItemPrivate {
    /* The parent EDayView widget. */
    EDayView *day_view;

    /* Show dates or events. */
    gboolean show_dates;
};

enum {
    PROP_0,
    PROP_DAY_VIEW,
    PROP_SHOW_DATES
};

G_DEFINE_TYPE (
    EDayViewTopItem,
    e_day_view_top_item,
    GNOME_TYPE_CANVAS_ITEM)

/* This draws a little triangle to indicate that an event extends past
 * the days visible on screen. */
static void
day_view_top_item_draw_triangle (EDayViewTopItem *top_item,
                                 cairo_t *cr,
                                 gint x,
                                 gint y,
                                 gint w,
                                 gint h,
                                 gint event_num)
{
    EDayView *day_view;
    EDayViewEvent *event;
    GdkColor bg_color;
    GdkPoint points[3];
    gint c1, c2;

    day_view = e_day_view_top_item_get_day_view (top_item);

    points[0].x = x;
    points[0].y = y;
    points[1].x = x + w;
    points[1].y = y + (h / 2);
    points[2].x = x;
    points[2].y = y + h - 1;

    /* If the height is odd we can use the same central point for both
     * lines. If it is even we use different end-points. */
    c1 = c2 = y + (h / 2);
    if (h % 2 == 0)
        c1--;

    if (!is_array_index_in_bounds (day_view->long_events, event_num))
        return;

    event = &g_array_index (day_view->long_events, EDayViewEvent,
                event_num);

    if (!is_comp_data_valid (event))
        return;

    cairo_save (cr);
    /* Fill it in. */
    if (gdk_color_parse (
        e_cal_model_get_color_for_component (
        e_calendar_view_get_model (E_CALENDAR_VIEW (day_view)),
        event->comp_data), &bg_color)) {
        gdk_cairo_set_source_color (cr, &bg_color);
    } else {
        gdk_cairo_set_source_color (
            cr, &day_view->colors
            [E_DAY_VIEW_COLOR_LONG_EVENT_BACKGROUND]);
    }

    cairo_move_to (cr, points[0].x, points[0].y);
    cairo_line_to (cr, points[1].x, points[1].y);
    cairo_line_to (cr, points[2].x, points[2].y);
    cairo_line_to (cr, points[0].x, points[0].y);
    cairo_fill (cr);
    cairo_restore (cr);

    cairo_save (cr);
    gdk_cairo_set_source_color (
        cr, &day_view->colors[E_DAY_VIEW_COLOR_LONG_EVENT_BORDER]);
    cairo_move_to (cr, x, y);
    cairo_line_to (cr, x + w, c1);
    cairo_move_to (cr, x, y + h - 1);
    cairo_line_to (cr, x + w, c2);
    cairo_stroke (cr);
    cairo_restore (cr);
}

/* This draws one event in the top canvas. */
static void
day_view_top_item_draw_long_event (EDayViewTopItem *top_item,
                                   gint event_num,
                                   cairo_t *cr,
                                   gint x,
                                   gint y,
                                   gint width,
                                   gint height)
{
    EDayView *day_view;
    EDayViewEvent *event;
    GtkStyle *style;
    gint start_day, end_day;
    gint item_x, item_y, item_w, item_h;
    gint text_x, icon_x, icon_y, icon_x_inc;
    ECalModel *model;
    ECalComponent *comp;
    gchar buffer[16];
    gint hour, display_hour, minute, offset, time_width, time_x;
    gint min_end_time_x, suffix_width, max_icon_x;
    const gchar *suffix;
    gboolean draw_start_triangle, draw_end_triangle;
    GSList *categories_list, *elem;
    PangoLayout *layout;
    GdkColor bg_color;
    cairo_pattern_t *pat;
    guint16 red, green, blue;
    gdouble cc = 65535.0;
    gdouble x0, y0, rect_height, rect_width, radius;

    day_view = e_day_view_top_item_get_day_view (top_item);
    model = e_calendar_view_get_model (E_CALENDAR_VIEW (day_view));

    /* If the event is currently being dragged, don't draw it. It will
     * be drawn in the special drag items. */
    if (day_view->drag_event_day == E_DAY_VIEW_LONG_EVENT
        && day_view->drag_event_num == event_num)
        return;

    if (!e_day_view_get_long_event_position (day_view, event_num,
                         &start_day, &end_day,
                         &item_x, &item_y,
                         &item_w, &item_h))
        return;

    if (!is_array_index_in_bounds (day_view->long_events, event_num))
        return;

    event = &g_array_index (day_view->long_events, EDayViewEvent,
                event_num);

    if (!is_comp_data_valid (event))
        return;

    style = gtk_widget_get_style (GTK_WIDGET (day_view));
    comp = e_cal_component_new ();
    e_cal_component_set_icalcomponent (
        comp, icalcomponent_new_clone (event->comp_data->icalcomp));

    if (gdk_color_parse (
        e_cal_model_get_color_for_component (
        e_calendar_view_get_model (E_CALENDAR_VIEW (day_view)),
        event->comp_data), &bg_color)) {
        red = bg_color.red;
        green = bg_color.green;
        blue = bg_color.blue;
    } else {
        red = day_view->colors[E_DAY_VIEW_COLOR_LONG_EVENT_BACKGROUND].red;
        green = day_view->colors[E_DAY_VIEW_COLOR_LONG_EVENT_BACKGROUND].green;
        blue = day_view->colors[E_DAY_VIEW_COLOR_LONG_EVENT_BACKGROUND].blue;
    }

    /* Fill the background with white to play with transparency */
    cairo_save (cr);
    x0     = item_x - x + 4;
    y0     = item_y + 1 - y;
    rect_width  = item_w - 8;
    rect_height = item_h - 2;

    radius = 12;

    draw_curved_rectangle (cr, x0, y0, rect_width, rect_height, radius);

    cairo_set_source_rgba (cr, 1, 1, 1, 1.0);
    cairo_fill_preserve (cr);

    cairo_restore (cr);

    /* Draw the border around the event */

    cairo_save (cr);
    x0     = item_x - x + 4;
    y0     = item_y + 1 - y;
    rect_width  = item_w - 8;
    rect_height = item_h - 2;

    radius = 12;

    draw_curved_rectangle (cr, x0, y0, rect_width, rect_height, radius);

    cairo_set_source_rgb (cr, red / cc, green / cc, blue / cc);
    cairo_set_line_width (cr, 1.5);
    cairo_stroke (cr);
    cairo_restore (cr);

    /* Fill in with gradient */

    cairo_save (cr);

    x0     = item_x - x + 5.5;
    y0     = item_y + 2.5 - y;
    rect_width  = item_w - 11;
    rect_height = item_h - 5;

    radius = 10;

    draw_curved_rectangle (cr, x0, y0, rect_width, rect_height, radius);

    pat = cairo_pattern_create_linear (
        item_x - x + 5.5, item_y + 2.5 - y,
        item_x - x + 5, item_y - y + item_h + 7.5);
    cairo_pattern_add_color_stop_rgba (pat, 1, red / cc, green / cc, blue / cc, 0.8);
    cairo_pattern_add_color_stop_rgba (pat, 0, red / cc, green / cc, blue / cc, 0.4);
    cairo_set_source (cr, pat);
    cairo_fill_preserve (cr);
    cairo_pattern_destroy (pat);

    cairo_set_source_rgba (cr, red / cc, green / cc, blue / cc, 0);
    cairo_set_line_width (cr, 0.5);
    cairo_stroke (cr);
    cairo_restore (cr);

    /* When resizing we don't draw the triangles.*/
    draw_start_triangle = TRUE;
    draw_end_triangle = TRUE;
    if (day_view->resize_drag_pos != E_CALENDAR_VIEW_POS_NONE
        && day_view->resize_event_day == E_DAY_VIEW_LONG_EVENT
        && day_view->resize_event_num == event_num) {
        if (day_view->resize_drag_pos == E_CALENDAR_VIEW_POS_LEFT_EDGE)
            draw_start_triangle = FALSE;

        if  (day_view->resize_drag_pos == E_CALENDAR_VIEW_POS_RIGHT_EDGE)
            draw_end_triangle = FALSE;
    }

    /* If the event starts before the first day shown, draw a triangle */
    if (draw_start_triangle
        && event->start < day_view->day_starts[start_day]) {
        day_view_top_item_draw_triangle (
            top_item, cr, item_x - x + 4, item_y - y,
            -E_DAY_VIEW_BAR_WIDTH, item_h, event_num);
    }

    /* Similar for the event end. */
    if (draw_end_triangle
        && event->end > day_view->day_starts[end_day + 1]) {
        day_view_top_item_draw_triangle (
            top_item, cr, item_x + item_w - 4 - x,
            item_y - y, E_DAY_VIEW_BAR_WIDTH, item_h,
            event_num);
    }

    /* If we are editing the event we don't show the icons or the start
     * & end times. */
    if (day_view->editing_event_day == E_DAY_VIEW_LONG_EVENT
        && day_view->editing_event_num == event_num) {
        g_object_unref (comp);
        return;
    }

    /* Determine the position of the label, so we know where to place the
     * icons. Note that since the top canvas never scrolls we don't need
     * to take the scroll offset into account. It will always be 0. */
    text_x = event->canvas_item->x1;

    /* Draw the start & end times, if necessary. */
    min_end_time_x = item_x + E_DAY_VIEW_LONG_EVENT_X_PAD - x;

    time_width = e_day_view_get_time_string_width (day_view);

    gdk_cairo_set_source_color (cr, &style->fg[GTK_STATE_NORMAL]);

    if (event->start > day_view->day_starts[start_day]) {
        offset = day_view->first_hour_shown * 60
            + day_view->first_minute_shown + event->start_minute;
        hour = offset / 60;
        minute = offset % 60;
        /* Calculate the actual hour number to display. For 12-hour
         * format we convert 0-23 to 12-11am/12-11pm. */
        e_day_view_convert_time_to_display (
            day_view, hour,
            &display_hour,
            &suffix, &suffix_width);
        if (e_cal_model_get_use_24_hour_format (model)) {
            g_snprintf (
                buffer, sizeof (buffer), "%i:%02i",
                display_hour, minute);
        } else {
            g_snprintf (
                buffer, sizeof (buffer), "%i:%02i%s",
                display_hour, minute, suffix);
        }

        cairo_save (cr);

        cairo_rectangle (
            cr,
            item_x - x, item_y - y,
            item_w - E_DAY_VIEW_LONG_EVENT_BORDER_WIDTH, item_h);
        cairo_clip (cr);

        time_x = item_x + E_DAY_VIEW_LONG_EVENT_X_PAD - x;
        if (display_hour < 10)
            time_x += day_view->digit_width;

        layout = gtk_widget_create_pango_layout (GTK_WIDGET (day_view), buffer);
        cairo_move_to (
            cr,
            time_x,
            item_y + E_DAY_VIEW_LONG_EVENT_BORDER_HEIGHT +
            E_DAY_VIEW_LONG_EVENT_Y_PAD - y);
        pango_cairo_show_layout (cr, layout);
        g_object_unref (layout);

        cairo_restore (cr);

        min_end_time_x += time_width
            + E_DAY_VIEW_LONG_EVENT_TIME_X_PAD;
    }

    max_icon_x = item_x + item_w - E_DAY_VIEW_LONG_EVENT_X_PAD
        - E_DAY_VIEW_ICON_WIDTH;

    if (event->end < day_view->day_starts[end_day + 1]) {
        offset = day_view->first_hour_shown * 60
            + day_view->first_minute_shown
            + event->end_minute;
        hour = offset / 60;
        minute = offset % 60;
        time_x =
            item_x + item_w - E_DAY_VIEW_LONG_EVENT_X_PAD -
            time_width - E_DAY_VIEW_LONG_EVENT_TIME_X_PAD - x;

        if (time_x >= min_end_time_x) {
            /* Calculate the actual hour number to display. */
            e_day_view_convert_time_to_display (
                day_view, hour,
                &display_hour,
                &suffix,
                &suffix_width);
            if (e_cal_model_get_use_24_hour_format (model)) {
                g_snprintf (
                    buffer, sizeof (buffer),
                    "%i:%02i", display_hour, minute);
            } else {
                g_snprintf (
                    buffer, sizeof (buffer),
                    "%i:%02i%s", display_hour, minute,
                    suffix);
            }

            if (display_hour < 10)
                time_x += day_view->digit_width;

            layout = gtk_widget_create_pango_layout (GTK_WIDGET (day_view), buffer);
            cairo_move_to (
                cr,
                time_x,
                item_y + E_DAY_VIEW_LONG_EVENT_Y_PAD + 1 - y);
            pango_cairo_show_layout (cr, layout);
            g_object_unref (layout);

            max_icon_x -= time_width + E_DAY_VIEW_LONG_EVENT_TIME_X_PAD;
        }
    }

    /* Draw the icons. */
    icon_x_inc = E_DAY_VIEW_ICON_WIDTH + E_DAY_VIEW_ICON_X_PAD;
    icon_x = text_x - E_DAY_VIEW_LONG_EVENT_ICON_R_PAD
        - icon_x_inc - x;
    icon_y = item_y + E_DAY_VIEW_LONG_EVENT_BORDER_HEIGHT
        + E_DAY_VIEW_ICON_Y_PAD - y;

    if (icon_x <= max_icon_x && (
        e_cal_component_has_recurrences (comp) ||
        e_cal_component_is_instance (comp))) {
        cairo_save (cr);
        gdk_cairo_set_source_pixbuf (cr, day_view->recurrence_icon, icon_x, icon_y);
        cairo_paint (cr);
        cairo_restore (cr);

        icon_x -= icon_x_inc;
    }

    if (icon_x <= max_icon_x && e_cal_component_has_attachments (comp)) {
        cairo_save (cr);
        gdk_cairo_set_source_pixbuf (cr, day_view->attach_icon, icon_x, icon_y);
        cairo_paint (cr);
        cairo_restore (cr);

        icon_x -= icon_x_inc;
    }
    if (icon_x <= max_icon_x && e_cal_component_has_alarms (comp)) {
        cairo_save (cr);
        gdk_cairo_set_source_pixbuf (cr, day_view->reminder_icon, icon_x, icon_y);
        cairo_paint (cr);
        cairo_restore (cr);

        icon_x -= icon_x_inc;
    }

    if (icon_x <= max_icon_x && e_cal_component_has_attendees (comp)) {
        cairo_save (cr);
        gdk_cairo_set_source_pixbuf (cr, day_view->meeting_icon, icon_x, icon_y);
        cairo_paint (cr);
        cairo_restore (cr);

        icon_x -= icon_x_inc;
    }

    /* draw categories icons */
    e_cal_component_get_categories_list (comp, &categories_list);
    for (elem = categories_list; elem; elem = elem->next) {
        gchar *category;
        const gchar *file;
        GdkPixbuf *pixbuf;

        category = (gchar *) elem->data;
        file = e_categories_get_icon_file_for (category);
        if (!file)
            continue;

        pixbuf = gdk_pixbuf_new_from_file (file, NULL);
        if (pixbuf == NULL)
            continue;

        if (icon_x <= max_icon_x) {
            gdk_cairo_set_source_pixbuf (
                cr, pixbuf,
                icon_x, icon_y);
            cairo_rectangle (
                cr,
                icon_x, icon_y,
                E_DAY_VIEW_ICON_WIDTH,
                E_DAY_VIEW_ICON_HEIGHT);
            cairo_fill (cr);
            icon_x -= icon_x_inc;
        }
    }

    e_cal_component_free_categories_list (categories_list);
    g_object_unref (comp);
}

static void
day_view_top_item_set_property (GObject *object,
                                guint property_id,
                                const GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_DAY_VIEW:
            e_day_view_top_item_set_day_view (
                E_DAY_VIEW_TOP_ITEM (object),
                g_value_get_object (value));
            return;

        case PROP_SHOW_DATES:
            e_day_view_top_item_set_show_dates (
                E_DAY_VIEW_TOP_ITEM (object),
                g_value_get_boolean (value));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
day_view_top_item_get_property (GObject *object,
                                guint property_id,
                                GValue *value,
                                GParamSpec *pspec)
{
    switch (property_id) {
        case PROP_DAY_VIEW:
            g_value_set_object (
                value, e_day_view_top_item_get_day_view (
                E_DAY_VIEW_TOP_ITEM (object)));
            return;

        case PROP_SHOW_DATES:
            g_value_set_boolean (
                value, e_day_view_top_item_get_show_dates (
                E_DAY_VIEW_TOP_ITEM (object)));
            return;
    }

    G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}

static void
day_view_top_item_dispose (GObject *object)
{
    EDayViewTopItemPrivate *priv;

    priv = E_DAY_VIEW_TOP_ITEM_GET_PRIVATE (object);

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

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

static void
day_view_top_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_day_view_top_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
day_view_top_item_draw (GnomeCanvasItem *canvas_item,
                        cairo_t *cr,
                        gint x,
                        gint y,
                        gint width,
                        gint height)
{
    EDayViewTopItem *top_item;
    EDayView *day_view;
    GtkStyle *style;
    gchar buffer[128];
    GtkAllocation allocation;
    GdkRectangle clip_rect;
    gint canvas_width, canvas_height, left_edge, day, date_width, date_x;
    gint item_height, event_num;
    PangoLayout *layout;
    GdkColor bg, light, dark;
    gboolean show_dates;

    top_item = E_DAY_VIEW_TOP_ITEM (canvas_item);
    day_view = e_day_view_top_item_get_day_view (top_item);
    g_return_if_fail (day_view != NULL);
    show_dates = top_item->priv->show_dates;

    style = gtk_widget_get_style (GTK_WIDGET (day_view));
    gtk_widget_get_allocation (
        GTK_WIDGET (canvas_item->canvas), &allocation);
    canvas_width = allocation.width;
    canvas_height =
        (show_dates ? 1 :
        (MAX (1, day_view->rows_in_top_display) + 1)) *
        day_view->top_row_height;
    left_edge = 0;
    item_height = day_view->top_row_height - E_DAY_VIEW_TOP_CANVAS_Y_GAP;

    bg = style->bg[GTK_STATE_NORMAL];
    light = style->light[GTK_STATE_NORMAL];
    dark = style->dark[GTK_STATE_NORMAL];

    if (show_dates) {
        /* Draw the shadow around the dates. */
        cairo_save (cr);
        gdk_cairo_set_source_color (cr, &light);
        cairo_move_to (cr, left_edge - x, 1 - y);
        cairo_line_to (cr, canvas_width - 2 - x, 1 - y);
        cairo_move_to (cr, left_edge - x, 2 - y);
        cairo_line_to (cr, left_edge - x, item_height - 2 - y);
        cairo_stroke (cr);
        cairo_restore (cr);

        cairo_save (cr);
        gdk_cairo_set_source_color (cr, &dark);
        cairo_move_to (cr, left_edge - x, item_height - 1 - y);
        cairo_line_to (cr, canvas_width - 1 - x, item_height - 1 - y);
        cairo_move_to (cr, canvas_width - 1 - x, 1 - y);
        cairo_line_to (cr, canvas_width - 1 - x, item_height - 1 - y);
        cairo_stroke (cr);
        cairo_restore (cr);

        /* Draw the background for the dates. */
        cairo_save (cr);
        gdk_cairo_set_source_color (cr, &bg);
        cairo_rectangle (
            cr, left_edge + 2 - x, 2 - y,
            canvas_width - left_edge - 3,
            item_height - 3);
        cairo_fill (cr);
        cairo_restore (cr);
    }

    if (!show_dates) {
        /* Clear the main area background. */
        cairo_save (cr);
        gdk_cairo_set_source_color (
            cr, &day_view->colors[E_DAY_VIEW_COLOR_BG_TOP_CANVAS]);
        cairo_rectangle (
            cr, left_edge - x, - y,
            canvas_width - left_edge,
            canvas_height);
        cairo_fill (cr);
        cairo_restore (cr);

        /* Draw the selection background. */
        if (gtk_widget_has_focus (GTK_WIDGET (day_view))
            && day_view->selection_start_day != -1) {
            gint start_col, end_col, rect_x, rect_y, rect_w, rect_h;

            start_col = day_view->selection_start_day;
            end_col = day_view->selection_end_day;

            if (end_col > start_col
                || day_view->selection_start_row == -1
                || day_view->selection_end_row == -1) {
                rect_x = day_view->day_offsets[start_col];
                rect_y = 0;
                rect_w = day_view->day_offsets[end_col + 1] - rect_x;
                rect_h = canvas_height - 1 - rect_y;

                cairo_save (cr);
                gdk_cairo_set_source_color (
                    cr, &day_view->colors
                    [E_DAY_VIEW_COLOR_BG_TOP_CANVAS_SELECTED]);
                cairo_rectangle (
                    cr, rect_x - x, rect_y - y,
                    rect_w, rect_h);
                cairo_fill (cr);
                cairo_restore (cr);
            }
        }
    }

    if (show_dates) {
        gint days_shown;

        days_shown = e_day_view_get_days_shown (day_view);

        /* Draw the date. Set a clipping rectangle
         * so we don't draw over the next day. */
        for (day = 0; day < days_shown; day++) {
            e_day_view_top_item_get_day_label (
                day_view, day, buffer, sizeof (buffer));
            clip_rect.x = day_view->day_offsets[day] - x;
            clip_rect.y = 2 - y;
            if (days_shown == 1) {
                gtk_widget_get_allocation (
                    day_view->top_canvas, &allocation);
                clip_rect.width =
                    allocation.width -
                    day_view->day_offsets[day];
            } else
                clip_rect.width = day_view->day_widths[day];
            clip_rect.height = item_height - 2;

            cairo_save (cr);

            gdk_cairo_rectangle (cr, &clip_rect);
            cairo_clip (cr);

            layout = gtk_widget_create_pango_layout (
                GTK_WIDGET (day_view), buffer);
            pango_layout_get_pixel_size (layout, &date_width, NULL);
            date_x = day_view->day_offsets[day] +
                (clip_rect.width - date_width) / 2;

            gdk_cairo_set_source_color (
                cr, &style->fg[GTK_STATE_NORMAL]);
            cairo_move_to (cr, date_x - x, 3 - y);
            pango_cairo_show_layout (cr, layout);

            g_object_unref (layout);
            cairo_restore (cr);

            /* Draw the lines down the left and right of the date cols. */
            if (day != 0) {
                cairo_save (cr);
                gdk_cairo_set_source_color (cr, &light);
                cairo_move_to (
                    cr, day_view->day_offsets[day] - x,
                    4 - y);
                cairo_line_to (
                    cr, day_view->day_offsets[day] - x,
                    item_height - 4 - y);
                cairo_stroke (cr);
                gdk_cairo_set_source_color (cr, &dark);
                cairo_move_to (
                    cr, day_view->day_offsets[day] - 1 - x,
                    4 - y);
                cairo_line_to (
                    cr, day_view->day_offsets[day] - 1 - x,
                    item_height - 4 - y);
                cairo_stroke (cr);
                cairo_restore (cr);
            }

            /* Draw the lines between each column. */
            if (day != 0) {
                cairo_save (cr);
                gdk_cairo_set_source_color (
                    cr, &day_view->colors
                    [E_DAY_VIEW_COLOR_BG_TOP_CANVAS_GRID]);
                cairo_move_to (
                    cr, day_view->day_offsets[day] - x,
                    item_height - y);
                cairo_line_to (
                    cr, day_view->day_offsets[day] - x,
                    canvas_height - y);
                cairo_stroke (cr);
                cairo_restore (cr);
            }
        }
    }

    if (!show_dates) {
        /* Draw the long events. */
        for (event_num = 0; event_num < day_view->long_events->len; event_num++) {
            day_view_top_item_draw_long_event (
                top_item, event_num, cr,
                x, y, width, height);
        }
    }
}

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

static void
e_day_view_top_item_class_init (EDayViewTopItemClass *class)
{
    GObjectClass *object_class;
    GnomeCanvasItemClass *item_class;

    g_type_class_add_private (class, sizeof (EDayViewTopItemPrivate));

    object_class = G_OBJECT_CLASS (class);
    object_class->set_property = day_view_top_item_set_property;
    object_class->get_property = day_view_top_item_get_property;
    object_class->dispose = day_view_top_item_dispose;

    item_class = GNOME_CANVAS_ITEM_CLASS (class);
    item_class->update = day_view_top_item_update;
    item_class->draw = day_view_top_item_draw;
    item_class->point = day_view_top_item_point;

    g_object_class_install_property (
        object_class,
        PROP_DAY_VIEW,
        g_param_spec_object (
            "day_view",
            "Day View",
            NULL,
            E_TYPE_DAY_VIEW,
            G_PARAM_READWRITE));

    g_object_class_install_property (
        object_class,
        PROP_SHOW_DATES,
        g_param_spec_boolean (
            "show_dates",
            "Show Dates",
            NULL,
            TRUE,
            G_PARAM_READWRITE));
}

static void
e_day_view_top_item_init (EDayViewTopItem *top_item)
{
    top_item->priv = E_DAY_VIEW_TOP_ITEM_GET_PRIVATE (top_item);
}

void
e_day_view_top_item_get_day_label (EDayView *day_view,
                                   gint day,
                                   gchar *buffer,
                                   gint buffer_len)
{
    ECalendarView *view;
    struct icaltimetype day_start_tt;
    const icaltimezone *zone;
    struct tm day_start = { 0 };
    const gchar *format;

    view = E_CALENDAR_VIEW (day_view);
    zone = e_calendar_view_get_timezone (view);

    day_start_tt = icaltime_from_timet_with_zone (
        day_view->day_starts[day], FALSE, zone);
    day_start.tm_year = day_start_tt.year - 1900;
    day_start.tm_mon = day_start_tt.month - 1;
    day_start.tm_mday = day_start_tt.day;
    day_start.tm_isdst = -1;

    day_start.tm_wday = time_day_of_week (
        day_start_tt.day,
        day_start_tt.month - 1,
        day_start_tt.year);

    if (day_view->date_format == E_DAY_VIEW_DATE_FULL)
        /* strftime format %A = full weekday name, %d = day of month,
         * %B = full month name. Don't use any other specifiers. */
        format = _("%A %d %B");
    else if (day_view->date_format == E_DAY_VIEW_DATE_ABBREVIATED)
        /* strftime format %a = abbreviated weekday name, %d = day of month,
         * %b = abbreviated month name. Don't use any other specifiers. */
        format = _("%a %d %b");
    else if (day_view->date_format == E_DAY_VIEW_DATE_NO_WEEKDAY)
        /* strftime format %d = day of month, %b = abbreviated month name.
         * Don't use any other specifiers. */
        format = _("%d %b");
    else
        format = "%d";

    e_utf8_strftime (buffer, buffer_len, format, &day_start);
}

EDayView *
e_day_view_top_item_get_day_view (EDayViewTopItem *top_item)
{
    g_return_val_if_fail (E_IS_DAY_VIEW_TOP_ITEM (top_item), NULL);

    return top_item->priv->day_view;
}

void
e_day_view_top_item_set_day_view (EDayViewTopItem *top_item,
                                  EDayView *day_view)
{
    g_return_if_fail (E_IS_DAY_VIEW_TOP_ITEM (top_item));
    g_return_if_fail (E_IS_DAY_VIEW (day_view));

    if (top_item->priv->day_view == day_view)
        return;

    if (top_item->priv->day_view != NULL)
        g_object_unref (top_item->priv->day_view);

    top_item->priv->day_view = g_object_ref (day_view);

    g_object_notify (G_OBJECT (top_item), "day-view");
}

gboolean
e_day_view_top_item_get_show_dates (EDayViewTopItem *top_item)
{
    g_return_val_if_fail (E_IS_DAY_VIEW_TOP_ITEM (top_item), FALSE);

    return top_item->priv->show_dates;
}

void
e_day_view_top_item_set_show_dates (EDayViewTopItem *top_item,
                                    gboolean show_dates)
{
    g_return_if_fail (E_IS_DAY_VIEW_TOP_ITEM (top_item));

    if (top_item->priv->show_dates == show_dates)
        return;

    top_item->priv->show_dates = show_dates;

    g_object_notify (G_OBJECT (top_item), "show-dates");
}