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

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */

/* 
 * Author : 
 *  Damon Chaplin <damon@ximian.com>
 *
 * Copyright 1999, Ximian, Inc.
 * Copyright 2001, Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or 
 * modify it under the terms of version 2 of the GNU General Public 
 * License as published by the Free Software Foundation.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA
 */

/*
 * EWeekViewEventItem - displays the background, times and icons for an event
 * in the week/month views. A separate EText canvas item is used to display &
 * edit the text.
 */

#include <config.h>

#include "e-util/e-categories-config.h"
#include "e-week-view-event-item.h"

#include <gtk/gtksignal.h>
#include <gal/e-text/e-text.h>

static void e_week_view_event_item_class_init   (EWeekViewEventItemClass *class);
static void e_week_view_event_item_init     (EWeekViewEventItem *wveitem);

static void e_week_view_event_item_set_arg  (GtkObject   *o,
                         GtkArg      *arg,
                         guint        arg_id);
static void e_week_view_event_item_update   (GnomeCanvasItem *item,
                         double      *affine,
                         ArtSVP      *clip_path,
                         int          flags);
static void e_week_view_event_item_draw     (GnomeCanvasItem *item,
                         GdkDrawable     *drawable,
                         int          x,
                         int          y,
                         int          width,
                         int          height);
static void e_week_view_draw_time       (EWeekView  *week_view,
                         GdkDrawable    *drawable,
                         gint        time_x,
                         gint        time_y,
                         gint        hour,
                         gint        minute);
static void e_week_view_event_item_draw_icons   (EWeekViewEventItem *wveitem,
                         GdkDrawable        *drawable,
                         gint            icon_x,
                         gint            icon_y,
                         gint            x2,
                         gboolean        right_align);
static void e_week_view_event_item_draw_triangle (EWeekViewEventItem *wveitem,
                          GdkDrawable        *drawable,
                          gint            x,
                          gint            y,
                          gint            w,
                          gint            h);
static double e_week_view_event_item_point  (GnomeCanvasItem *item,
                         double       x,
                         double       y,
                         int          cx,
                         int          cy,
                         GnomeCanvasItem **actual_item);
static gint e_week_view_event_item_event    (GnomeCanvasItem *item,
                         GdkEvent    *event);
static gboolean e_week_view_event_item_button_press (EWeekViewEventItem *wveitem,
                             GdkEvent       *event);
static gboolean e_week_view_event_item_button_release (EWeekViewEventItem *wveitem,
                               GdkEvent       *event);
static gboolean e_week_view_event_item_double_click (EWeekViewEventItem *wveitem,
                             GdkEvent       *bevent);
static EWeekViewPosition e_week_view_event_item_get_position (EWeekViewEventItem *wveitem,
                                  gdouble x,
                                  gdouble y);


static GnomeCanvasItemClass *parent_class;

/* The arguments we take */
enum {
    ARG_0,
    ARG_EVENT_NUM,
    ARG_SPAN_NUM
};


GtkType
e_week_view_event_item_get_type (void)
{
    static GtkType e_week_view_event_item_type = 0;

    if (!e_week_view_event_item_type) {
        GtkTypeInfo e_week_view_event_item_info = {
            "EWeekViewEventItem",
            sizeof (EWeekViewEventItem),
            sizeof (EWeekViewEventItemClass),
            (GtkClassInitFunc) e_week_view_event_item_class_init,
            (GtkObjectInitFunc) e_week_view_event_item_init,
            NULL, /* reserved_1 */
            NULL, /* reserved_2 */
            (GtkClassInitFunc) NULL
        };

        e_week_view_event_item_type = gtk_type_unique (gnome_canvas_item_get_type (), &e_week_view_event_item_info);
    }

    return e_week_view_event_item_type;
}


static void
e_week_view_event_item_class_init (EWeekViewEventItemClass *class)
{
    GtkObjectClass  *object_class;
    GnomeCanvasItemClass *item_class;

    parent_class = gtk_type_class (gnome_canvas_item_get_type());

    object_class = (GtkObjectClass *) class;
    item_class = (GnomeCanvasItemClass *) class;

    gtk_object_add_arg_type ("EWeekViewEventItem::event_num",
                 GTK_TYPE_INT, GTK_ARG_WRITABLE,
                 ARG_EVENT_NUM);
    gtk_object_add_arg_type ("EWeekViewEventItem::span_num",
                 GTK_TYPE_INT, GTK_ARG_WRITABLE,
                 ARG_SPAN_NUM);

    object_class->set_arg = e_week_view_event_item_set_arg;

    /* GnomeCanvasItem method overrides */
    item_class->update      = e_week_view_event_item_update;
    item_class->draw        = e_week_view_event_item_draw;
    item_class->point       = e_week_view_event_item_point;
    item_class->event       = e_week_view_event_item_event;
}


static void
e_week_view_event_item_init (EWeekViewEventItem *wveitem)
{
    wveitem->event_num = -1;
    wveitem->span_num = -1;
}


static void
e_week_view_event_item_set_arg (GtkObject *o, GtkArg *arg, guint arg_id)
{
    GnomeCanvasItem *item;
    EWeekViewEventItem *wveitem;
    gboolean needs_update = FALSE;

    item = GNOME_CANVAS_ITEM (o);
    wveitem = E_WEEK_VIEW_EVENT_ITEM (o);
    
    switch (arg_id){
    case ARG_EVENT_NUM:
        wveitem->event_num = GTK_VALUE_INT (*arg);
        needs_update = TRUE;
        break;
    case ARG_SPAN_NUM:
        wveitem->span_num = GTK_VALUE_INT (*arg);
        needs_update = TRUE;
        break;
    }

    if (needs_update)
        gnome_canvas_item_request_update (item);
}


static void
e_week_view_event_item_update (GnomeCanvasItem *item,
                   double          *affine,
                   ArtSVP          *clip_path,
                   int          flags)
{
    EWeekViewEventItem *wveitem;
    EWeekView *week_view;
    gint span_x, span_y, span_w;

#if 0
    g_print ("In e_week_view_event_item_update\n");
#endif

    wveitem = E_WEEK_VIEW_EVENT_ITEM (item);
    week_view = E_WEEK_VIEW (GTK_WIDGET (item->canvas)->parent);
    g_return_if_fail (E_IS_WEEK_VIEW (week_view));

    if (GNOME_CANVAS_ITEM_CLASS (parent_class)->update)
        (* GNOME_CANVAS_ITEM_CLASS (parent_class)->update) (item, affine, clip_path, flags);

    item->x1 = 0;
    item->y1 = 0;
    item->x2 = 0;
    item->y2 = 0;

    if (wveitem->event_num != -1 && wveitem->span_num != -1) {
        if (e_week_view_get_span_position (week_view,
                           wveitem->event_num,
                           wveitem->span_num,
                           &span_x, &span_y,
                           &span_w)) {
#if 0
            g_print ("  Event:%i Span:%i %i,%i W:%i\n",
                 wveitem->event_num, wveitem->span_num,
                 span_x, span_y, span_w);
#endif
            item->x1 = span_x;
            item->y1 = span_y;
            item->x2 = span_x + span_w - 1;
            item->y2 = span_y + week_view->row_height - 1;
        }
    }
}


/*
 * DRAWING ROUTINES - functions to paint the canvas item.
 */

static void
e_week_view_event_item_draw (GnomeCanvasItem  *canvas_item,
                 GdkDrawable      *drawable,
                 int           x,
                 int           y,
                 int           width,
                 int           height)
{
    EWeekViewEventItem *wveitem;
    EWeekView *week_view;
    EWeekViewEvent *event;
    EWeekViewEventSpan *span;
    GtkStyle *style;
    GdkGC *gc;
    gint x1, y1, x2, y2, time_x, time_y;
    gint icon_x, icon_y, time_width, min_end_time_x, max_icon_x;
    gint rect_x, rect_w, rect_x2;
    gboolean one_day_event, editing_span = FALSE;
    gint start_hour, start_minute, end_hour, end_minute;
    gboolean draw_start, draw_end;
    gboolean draw_start_triangle = FALSE, draw_end_triangle = FALSE;
    GdkRectangle clip_rect;

#if 0
    g_print ("In e_week_view_event_item_draw %i,%i %ix%i\n",
         x, y, width, height);
#endif

    wveitem = E_WEEK_VIEW_EVENT_ITEM (canvas_item);
    week_view = E_WEEK_VIEW (GTK_WIDGET (canvas_item->canvas)->parent);
    g_return_if_fail (E_IS_WEEK_VIEW (week_view));

    if (wveitem->event_num == -1 || wveitem->span_num == -1)
        return;

    event = &g_array_index (week_view->events, EWeekViewEvent,
                wveitem->event_num);
    span = &g_array_index (week_view->spans, EWeekViewEventSpan,
                   event->spans_index + wveitem->span_num);

    style = GTK_WIDGET (week_view)->style;
    gc = week_view->main_gc;

    x1 = canvas_item->x1 - x;
    y1 = canvas_item->y1 - y;
    x2 = canvas_item->x2 - x;
    y2 = canvas_item->y2 - y;

    if (x1 == x2 || y1 == y2)
        return;

    icon_x = 0;
    icon_y = y1 + E_WEEK_VIEW_EVENT_BORDER_HEIGHT + E_WEEK_VIEW_ICON_Y_PAD;

    /* Get the start & end times in 24-hour format. */
    start_hour = event->start_minute / 60;
    start_minute = event->start_minute % 60;
    end_hour = event->end_minute / 60;
    end_minute = event->end_minute % 60;

    time_y = y1 + E_WEEK_VIEW_EVENT_BORDER_HEIGHT
        + E_WEEK_VIEW_EVENT_TEXT_Y_PAD;

    time_width = e_week_view_get_time_string_width (week_view);

    one_day_event = e_week_view_is_one_day_event (week_view,
                              wveitem->event_num);
    if (one_day_event) {
        time_x = x1 + E_WEEK_VIEW_EVENT_L_PAD;

        /* Draw the start and end times, as required. */
        switch (week_view->time_format) {
        case E_WEEK_VIEW_TIME_BOTH_SMALL_MIN:
        case E_WEEK_VIEW_TIME_BOTH:
            draw_start = TRUE;
            draw_end = TRUE;
            break;

        case E_WEEK_VIEW_TIME_START_SMALL_MIN:
        case E_WEEK_VIEW_TIME_START:
            draw_start = TRUE;
            draw_end = FALSE;
            break;

        case E_WEEK_VIEW_TIME_NONE:
            draw_start = FALSE;
            draw_end = FALSE;
            break;
        default:
            g_assert_not_reached();
            draw_start = FALSE;
            draw_end = FALSE;
            break;
        }

        if (draw_start) {
            e_week_view_draw_time (week_view, drawable,
                           time_x, time_y,
                           start_hour, start_minute);
            time_x += time_width;
        }

        if (draw_end) {
            time_x += E_WEEK_VIEW_EVENT_TIME_SPACING;
            e_week_view_draw_time (week_view, drawable,
                           time_x, time_y,
                           end_hour, end_minute);
            time_x += time_width;
        }

        icon_x = time_x;
        if (draw_start)
            icon_x += E_WEEK_VIEW_EVENT_TIME_X_PAD;

        /* Draw the icons. */
        e_week_view_event_item_draw_icons (wveitem, drawable,
                           icon_x, icon_y,
                           x2, FALSE);

    } else {
        rect_x = x1 + E_WEEK_VIEW_EVENT_L_PAD;
        rect_w = x2 - x1 - E_WEEK_VIEW_EVENT_L_PAD
            - E_WEEK_VIEW_EVENT_R_PAD + 1;

        /* Draw the triangles at the start & end, if needed.
           They also use the first few pixels at the edge of the
           event so we update rect_x & rect_w so we don't draw over
           them. */
        if (event->start < week_view->day_starts[span->start_day]) {
            draw_start_triangle = TRUE;
            rect_x += 2;
            rect_w -= 2;
        }

        if (event->end > week_view->day_starts[span->start_day
                              + span->num_days]) {
            draw_end_triangle = TRUE;
            rect_w -= 2;
        }

        gdk_gc_set_foreground (gc, &week_view->colors[E_WEEK_VIEW_COLOR_EVENT_BACKGROUND]);
        gdk_draw_rectangle (drawable, gc, TRUE,
                    rect_x, y1 + 1, rect_w, y2 - y1 - 1);

        gdk_gc_set_foreground (gc, &week_view->colors[E_WEEK_VIEW_COLOR_EVENT_BORDER]);
        rect_x2 = rect_x + rect_w - 1;
        gdk_draw_line (drawable, gc, rect_x,  y1, rect_x2, y1);
        gdk_draw_line (drawable, gc, rect_x,  y2, rect_x2, y2);

        if (draw_start_triangle) {
            e_week_view_event_item_draw_triangle (wveitem, drawable, x1 + E_WEEK_VIEW_EVENT_L_PAD + 2, y1, -3, y2 - y1 + 1);
        } else {
            gdk_draw_line (drawable, gc, rect_x,  y1, rect_x, y2);
        }

        if (draw_end_triangle) {
            e_week_view_event_item_draw_triangle (wveitem, drawable, x2 - E_WEEK_VIEW_EVENT_R_PAD - 2, y1, 3, y2 - y1 + 1);
        } else {
            gdk_draw_line (drawable, gc, rect_x2, y1, rect_x2, y2);
        }

        if (span->text_item && E_TEXT (span->text_item)->editing)
            editing_span = TRUE;

        /* Draw the start & end times, if they are not on day
           boundaries. The start time would always be shown if it was
           needed, though it may be clipped as the window shrinks.
           The end time is only displayed if there is enough room.
           We calculate the minimum position for the end time, which
           depends on whether the start time is displayed. If the end
           time doesn't fit, then we don't draw it. */
        min_end_time_x = x1 + E_WEEK_VIEW_EVENT_L_PAD
            + E_WEEK_VIEW_EVENT_BORDER_WIDTH
            + E_WEEK_VIEW_EVENT_EDGE_X_PAD;
        if (!editing_span
            && event->start > week_view->day_starts[span->start_day]) {
            time_x = x1 + E_WEEK_VIEW_EVENT_L_PAD
                + E_WEEK_VIEW_EVENT_BORDER_WIDTH
                + E_WEEK_VIEW_EVENT_EDGE_X_PAD;

            clip_rect.x = x1;
            clip_rect.y = y1;
            clip_rect.width = x2 - x1 - E_WEEK_VIEW_EVENT_R_PAD
                - E_WEEK_VIEW_EVENT_BORDER_WIDTH + 1;
            clip_rect.height = y2 - y1 + 1;
            gdk_gc_set_clip_rectangle (gc, &clip_rect);

            gdk_gc_set_foreground (gc, &week_view->colors[E_WEEK_VIEW_COLOR_EVENT_TEXT]);

            e_week_view_draw_time (week_view, drawable,
                           time_x, time_y,
                           start_hour, start_minute);

            gdk_gc_set_clip_rectangle (gc, NULL);

            /* We don't want the end time to be drawn over the
               start time, so we increase the minimum position. */
            min_end_time_x += time_width
                + E_WEEK_VIEW_EVENT_TIME_X_PAD;
        }

        max_icon_x = x2 + 1 - E_WEEK_VIEW_EVENT_R_PAD
            - E_WEEK_VIEW_EVENT_BORDER_WIDTH
            - E_WEEK_VIEW_EVENT_EDGE_X_PAD;

        if (!editing_span
            && event->end < week_view->day_starts[span->start_day
                             + span->num_days]) {
            /* Calculate where the end time should be displayed. */
            time_x = x2 + 1 - E_WEEK_VIEW_EVENT_R_PAD
                - E_WEEK_VIEW_EVENT_BORDER_WIDTH
                - E_WEEK_VIEW_EVENT_EDGE_X_PAD
                - time_width;

            /* Draw the end time, if the position is greater than
               the minimum calculated above. */
            if (time_x >= min_end_time_x) {
                e_week_view_draw_time (week_view, drawable,
                               time_x, time_y,
                               end_hour, end_minute);
                max_icon_x -= time_width
                    + E_WEEK_VIEW_EVENT_TIME_X_PAD;
            }
        }

        /* Draw the icons. */
        if (span->text_item
            && (week_view->editing_event_num != wveitem->event_num
            || week_view->editing_span_num != wveitem->span_num)) {
            icon_x = span->text_item->x1 - E_WEEK_VIEW_ICON_R_PAD - x;
            e_week_view_event_item_draw_icons (wveitem, drawable,
                               icon_x, icon_y,
                               max_icon_x, TRUE);
        }
    }
}


static void
e_week_view_draw_time   (EWeekView  *week_view,
             GdkDrawable    *drawable,
             gint        time_x,
             gint        time_y,
             gint        hour,
             gint        minute)
{
    GtkStyle *style;
    GdkGC *gc;
    GdkFont *font, *small_font;
    gint hour_to_display, suffix_width;
    gint time_y_normal_font, time_y_small_font;
    gchar buffer[128], *suffix;

    style = GTK_WIDGET (week_view)->style;
    font = style->font;
    small_font = week_view->small_font;
    gc = week_view->main_gc;

    gdk_gc_set_foreground (gc, &week_view->colors[E_WEEK_VIEW_COLOR_EVENT_TEXT]);

    time_y_normal_font = time_y_small_font = time_y + font->ascent;
    if (small_font)
        time_y_small_font = time_y + small_font->ascent;

    e_week_view_convert_time_to_display (week_view, hour, &hour_to_display,
                         &suffix, &suffix_width);

    if (week_view->use_small_font && week_view->small_font) {
        g_snprintf (buffer, sizeof (buffer), "%2i:%02i",
                hour_to_display, minute);

        /* Draw the hour. */
        if (hour_to_display < 10)
            gdk_draw_text (drawable, font, gc,
                       time_x + week_view->digit_width,
                       time_y_normal_font, buffer + 1, 1);
        else
            gdk_draw_text (drawable, font, gc,
                       time_x, time_y_normal_font, buffer, 2);

        time_x += week_view->digit_width * 2;

        /* Draw the start minute, in the small font. */
        gdk_draw_text (drawable, week_view->small_font, gc,
                   time_x, time_y_small_font, buffer + 3, 2);

        time_x += week_view->small_digit_width * 2;

        /* Draw the 'am'/'pm' suffix, if 12-hour format. */
        if (!week_view->use_24_hour_format) {
            gdk_draw_string (drawable, font, gc,
                     time_x, time_y_normal_font, suffix);
        }
    } else {
        /* Draw the start time in one go. */
        g_snprintf (buffer, sizeof (buffer), "%2i:%02i%s",
                hour_to_display, minute, suffix);
        if (hour_to_display < 10)
            gdk_draw_string (drawable, font, gc,
                     time_x + week_view->digit_width,
                     time_y_normal_font, buffer + 1);
        else
            gdk_draw_string (drawable, font, gc,
                     time_x, time_y_normal_font,
                     buffer);

    }
}


static void
e_week_view_event_item_draw_icons (EWeekViewEventItem *wveitem,
                   GdkDrawable        *drawable,
                   gint            icon_x,
                   gint            icon_y,
                   gint            x2,
                   gboolean        right_align)
{
    EWeekView *week_view;
    EWeekViewEvent *event;
    EWeekViewEventSpan *span;
    CalComponent *comp;
    GdkGC *gc;
    gint num_icons = 0, icon_x_inc;
    gboolean draw_reminder_icon = FALSE, draw_recurrence_icon = FALSE;
    gboolean draw_timezone_icon = FALSE;
    GSList *categories_list, *elem;

    week_view = E_WEEK_VIEW (GTK_WIDGET (GNOME_CANVAS_ITEM (wveitem)->canvas)->parent);

    event = &g_array_index (week_view->events, EWeekViewEvent,
                wveitem->event_num);
    span = &g_array_index (week_view->spans, EWeekViewEventSpan,
                   event->spans_index + wveitem->span_num);
    comp = event->comp;

    gc = week_view->main_gc;

    if (cal_component_has_alarms (comp)) {
        draw_reminder_icon = TRUE;
        num_icons++;
    }

    if (cal_component_has_recurrences (comp)) {
        draw_recurrence_icon = TRUE;
        num_icons++;
    }

    if (event->different_timezone) {
        draw_timezone_icon = TRUE;
        num_icons++;
    }

    cal_component_get_categories_list (comp, &categories_list);
    for (elem = categories_list; elem; elem = elem->next) {
        char *category;
        GdkPixmap *pixmap = NULL;
        GdkBitmap *mask = NULL;

        category = (char *) elem->data;
        if (e_categories_config_get_icon_for (category, &pixmap, &mask))
            num_icons++;
    }

    icon_x_inc = E_WEEK_VIEW_ICON_WIDTH + E_WEEK_VIEW_ICON_X_PAD;

    if (right_align)
        icon_x -= icon_x_inc * num_icons;

    if (draw_reminder_icon && icon_x + E_WEEK_VIEW_ICON_WIDTH <= x2) {
        gdk_gc_set_clip_origin (gc, icon_x, icon_y);
        gdk_gc_set_clip_mask (gc, week_view->reminder_mask);
        gdk_draw_pixmap (drawable, gc,
                 week_view->reminder_icon,
                 0, 0, icon_x, icon_y,
                 E_WEEK_VIEW_ICON_WIDTH,
                 E_WEEK_VIEW_ICON_HEIGHT);
        icon_x += icon_x_inc;
    }

    if (draw_recurrence_icon && icon_x + E_WEEK_VIEW_ICON_WIDTH <= x2) {
        gdk_gc_set_clip_origin (gc, icon_x, icon_y);
        gdk_gc_set_clip_mask (gc, week_view->recurrence_mask);
        gdk_draw_pixmap (drawable, gc,
                 week_view->recurrence_icon,
                 0, 0, icon_x, icon_y,
                 E_WEEK_VIEW_ICON_WIDTH,
                 E_WEEK_VIEW_ICON_HEIGHT);
        icon_x += icon_x_inc;
    }

    if (draw_timezone_icon && icon_x + E_WEEK_VIEW_ICON_WIDTH <= x2) {
        gdk_gc_set_clip_origin (gc, icon_x, icon_y);
        gdk_gc_set_clip_mask (gc, week_view->timezone_mask);
        gdk_draw_pixmap (drawable, gc,
                 week_view->timezone_icon,
                 0, 0, icon_x, icon_y,
                 E_WEEK_VIEW_ICON_WIDTH,
                 E_WEEK_VIEW_ICON_HEIGHT);
        icon_x += icon_x_inc;
    }

    /* draw categories icons */
    for (elem = categories_list; elem; elem = elem->next) {
        char *category;
        GdkPixmap *pixmap = NULL;
        GdkBitmap *mask = NULL;

        category = (char *) elem->data;
        if (!e_categories_config_get_icon_for (category, &pixmap, &mask))
            continue;

        if (icon_x + E_WEEK_VIEW_ICON_WIDTH <= x2) {
            gdk_gc_set_clip_origin (gc, icon_x, icon_y);
            if (mask != NULL)
                gdk_gc_set_clip_mask (gc, mask);
            gdk_draw_pixmap (drawable, gc,
                     pixmap,
                     0, 0, icon_x, icon_y,
                     E_WEEK_VIEW_ICON_WIDTH,
                     E_WEEK_VIEW_ICON_HEIGHT);
            icon_x += icon_x_inc;
        }
        gdk_pixmap_unref (pixmap);
        if (mask != NULL)
            gdk_bitmap_unref (mask);
    }

    cal_component_free_categories_list (categories_list);

    gdk_gc_set_clip_mask (gc, NULL);
}


/* This draws a little triangle to indicate that an event extends past
   the days visible on screen. */
static void
e_week_view_event_item_draw_triangle (EWeekViewEventItem *wveitem,
                      GdkDrawable    *drawable,
                      gint        x,
                      gint        y,
                      gint        w,
                      gint        h)
{
    EWeekView *week_view;
    GdkGC *gc;
    GdkPoint points[3];
    gint c1, c2;

    week_view = E_WEEK_VIEW (GTK_WIDGET (GNOME_CANVAS_ITEM (wveitem)->canvas)->parent);

    gc = week_view->main_gc;

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

    gdk_gc_set_foreground (gc, &week_view->colors[E_WEEK_VIEW_COLOR_EVENT_BACKGROUND]);
    gdk_draw_polygon (drawable, gc, TRUE, points, 3);

    gdk_gc_set_foreground (gc, &week_view->colors[E_WEEK_VIEW_COLOR_EVENT_BORDER]);

    /* 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--;

    gdk_draw_line (drawable, gc, x, y, x + w, c1);
    gdk_draw_line (drawable, gc, x, y + h - 1, x + w, c2);
}


/* This is supposed to return the nearest item the the point and the distance.
   Since we are the only item we just return ourself and 0 for the distance.
   This is needed so that we get button/motion events. */
static double
e_week_view_event_item_point (GnomeCanvasItem *item, double x, double y,
                  int cx, int cy,
                  GnomeCanvasItem **actual_item)
{
    *actual_item = item;
    return 0.0;
}


static gint
e_week_view_event_item_event (GnomeCanvasItem *item, GdkEvent *event)
{
    EWeekViewEventItem *wveitem;

    wveitem = E_WEEK_VIEW_EVENT_ITEM (item);

    switch (event->type) {
    case GDK_2BUTTON_PRESS:
        return e_week_view_event_item_double_click (wveitem, event);
    case GDK_BUTTON_PRESS:
        return e_week_view_event_item_button_press (wveitem, event);
    case GDK_BUTTON_RELEASE:
        return e_week_view_event_item_button_release (wveitem, event);
    case GDK_MOTION_NOTIFY:
        break;
    default:
        break;
    }

    return FALSE;
}


static gboolean
e_week_view_event_item_button_press (EWeekViewEventItem *wveitem,
                     GdkEvent       *bevent)
{
    EWeekView *week_view;
    EWeekViewPosition pos;
    EWeekViewEvent *event;
    EWeekViewEventSpan *span;
    GnomeCanvasItem *item;

    item = GNOME_CANVAS_ITEM (wveitem);

    week_view = E_WEEK_VIEW (GTK_WIDGET (item->canvas)->parent);
    g_return_val_if_fail (E_IS_WEEK_VIEW (week_view), FALSE);

    event = &g_array_index (week_view->events, EWeekViewEvent,
                wveitem->event_num);
    span = &g_array_index (week_view->spans, EWeekViewEventSpan,
                   event->spans_index + wveitem->span_num);

#if 0
    g_print ("In e_week_view_event_item_button_press\n");
#endif

    pos = e_week_view_event_item_get_position (wveitem, bevent->button.x,
                           bevent->button.y);
    if (pos == E_WEEK_VIEW_POS_NONE)
        return FALSE;

    if (bevent->button.button == 1) {
        week_view->pressed_event_num = wveitem->event_num;
        week_view->pressed_span_num = wveitem->span_num;

        /* Ignore clicks on the event while editing. */
        if (E_TEXT (span->text_item)->editing)
            return FALSE;

        /* Remember the item clicked and the mouse position,
           so we can start a drag if the mouse moves. */
        week_view->drag_event_x = bevent->button.x;
        week_view->drag_event_y = bevent->button.y;

        /* FIXME: Remember the day offset from the start of the event.
         */

        return TRUE;
    } else if (bevent->button.button == 3) {
        if (!GTK_WIDGET_HAS_FOCUS (week_view))
            gtk_widget_grab_focus (GTK_WIDGET (week_view));

        e_week_view_set_selected_time_range_visible (week_view, event->start, event->end);

        e_week_view_show_popup_menu (week_view,
                         (GdkEventButton*) bevent,
                         wveitem->event_num);
        gtk_signal_emit_stop_by_name (GTK_OBJECT (item->canvas),
                          "button_press_event");

        return TRUE;
    }

    return FALSE;
}


static gboolean
e_week_view_event_item_button_release (EWeekViewEventItem *wveitem,
                       GdkEvent       *event)
{
    EWeekView *week_view;
    GnomeCanvasItem *item;

    item = GNOME_CANVAS_ITEM (wveitem);

    week_view = E_WEEK_VIEW (GTK_WIDGET (item->canvas)->parent);
    g_return_val_if_fail (E_IS_WEEK_VIEW (week_view), FALSE);

#if 0
    g_print ("In e_week_view_event_item_button_release\n");
#endif

    if (week_view->pressed_event_num != -1
        && week_view->pressed_event_num == wveitem->event_num
        && week_view->pressed_span_num == wveitem->span_num) {
        e_week_view_start_editing_event (week_view,
                         wveitem->event_num,
                         wveitem->span_num,
                         NULL);
        week_view->pressed_event_num = -1;
        return TRUE;
    }

    week_view->pressed_event_num = -1;

    return FALSE;
}


static gboolean
e_week_view_event_item_double_click (EWeekViewEventItem *wveitem,
                     GdkEvent       *bevent)
{
    EWeekView *week_view;
    EWeekViewEvent *event;
    GnomeCanvasItem *item;

    item = GNOME_CANVAS_ITEM (wveitem);

    week_view = E_WEEK_VIEW (GTK_WIDGET (item->canvas)->parent);
    g_return_val_if_fail (E_IS_WEEK_VIEW (week_view), FALSE);

    event = &g_array_index (week_view->events, EWeekViewEvent,
                wveitem->event_num);

    e_week_view_stop_editing_event (week_view);

    if (week_view->calendar)
        gnome_calendar_edit_object (week_view->calendar, event->comp, FALSE);
    else
        g_warning ("Calendar not set");

    return TRUE;
}


static EWeekViewPosition
e_week_view_event_item_get_position (EWeekViewEventItem *wveitem,
                     gdouble x,
                     gdouble y)
{
    EWeekView *week_view;
    GnomeCanvasItem *item;

    item = GNOME_CANVAS_ITEM (wveitem);

    week_view = E_WEEK_VIEW (GTK_WIDGET (item->canvas)->parent);
    g_return_val_if_fail (E_IS_WEEK_VIEW (week_view), E_WEEK_VIEW_POS_NONE);

#if 0
    g_print ("In e_week_view_event_item_get_position item: %g,%g %g,%g point: %g,%g\n", item->x1, item->y1, item->x2, item->y2, x, y);
#endif

    if (x < item->x1 + E_WEEK_VIEW_EVENT_L_PAD
        || x >= item->x2 - E_WEEK_VIEW_EVENT_R_PAD)
        return E_WEEK_VIEW_POS_NONE;

    /* Support left/right edge for long events only. */
    if (!e_week_view_is_one_day_event (week_view, wveitem->event_num)) {
        if (x < item->x1 + E_WEEK_VIEW_EVENT_L_PAD
            + E_WEEK_VIEW_EVENT_BORDER_WIDTH
            + E_WEEK_VIEW_EVENT_EDGE_X_PAD)
            return E_WEEK_VIEW_POS_LEFT_EDGE;

        if (x >= item->x2 + 1 - E_WEEK_VIEW_EVENT_R_PAD
            - E_WEEK_VIEW_EVENT_BORDER_WIDTH
            - E_WEEK_VIEW_EVENT_EDGE_X_PAD)
            return E_WEEK_VIEW_POS_RIGHT_EDGE;
    }

    return E_WEEK_VIEW_POS_EVENT;
}