path: root/calendar/gncal-day-view.c

/* Day view widget for gncal
 *
 * Copyright (C) 1998 The Free Software Foundation
 *
 * Author: Federico Mena <federico@nuclecu.unam.mx>
 */

#include <gtk/gtksignal.h>
#include "gncal-day-view.h"
#include "timeutil.h"
#include "view-utils.h"


#define TEXT_BORDER 2
#define MIN_INFO_WIDTH 50


static void gncal_day_view_class_init   (GncalDayViewClass *class);
static void gncal_day_view_init         (GncalDayView      *dview);
static void gncal_day_view_destroy      (GtkObject         *object);
static void gncal_day_view_realize      (GtkWidget         *widget);
static void gncal_day_view_size_request (GtkWidget         *widget,
                     GtkRequisition    *requisition);
static gint gncal_day_view_expose       (GtkWidget         *widget,
                     GdkEventExpose    *event);


static GtkWidgetClass *parent_class;


guint
gncal_day_view_get_type (void)
{
    static guint day_view_type = 0;

    if (!day_view_type) {
        GtkTypeInfo day_view_info = {
            "GncalDayView",
            sizeof (GncalDayView),
            sizeof (GncalDayViewClass),
            (GtkClassInitFunc) gncal_day_view_class_init,
            (GtkObjectInitFunc) gncal_day_view_init,
            (GtkArgSetFunc) NULL,
            (GtkArgGetFunc) NULL
        };

        day_view_type = gtk_type_unique (gtk_widget_get_type (), &day_view_info);
    }

    return day_view_type;
}

static void
gncal_day_view_class_init (GncalDayViewClass *class)
{
    GtkObjectClass *object_class;
    GtkWidgetClass *widget_class;

    object_class = (GtkObjectClass *) class;
    widget_class = (GtkWidgetClass *) class;

    parent_class = gtk_type_class (gtk_widget_get_type ());

    object_class->destroy = gncal_day_view_destroy;

    widget_class->realize = gncal_day_view_realize;
    widget_class->size_request = gncal_day_view_size_request;
    widget_class->expose_event = gncal_day_view_expose;
}

static void
gncal_day_view_init (GncalDayView *dview)
{
    GTK_WIDGET_UNSET_FLAGS (dview, GTK_NO_WINDOW);

    dview->calendar = NULL;

    dview->lower = 0;
    dview->upper = 0;

    dview->shadow_type = GTK_SHADOW_ETCHED_IN;
}

static void
gncal_day_view_destroy (GtkObject *object)
{
    GncalDayView *dview;

    g_return_if_fail (object != NULL);
    g_return_if_fail (GNCAL_IS_DAY_VIEW (object));

    dview = GNCAL_DAY_VIEW (object);

    if (dview->day_str)
        g_free (dview->day_str);
    if (dview->events)
        g_list_free (dview->events);
    
    if (GTK_OBJECT_CLASS (parent_class)->destroy)
        (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}

GtkWidget *
gncal_day_view_new (GnomeCalendar *calendar, time_t lower, time_t upper)
{
    GncalDayView *dview;

    g_return_val_if_fail (calendar != NULL, NULL);

    dview = gtk_type_new (gncal_day_view_get_type ());

    dview->calendar = calendar;
    dview->lower    = lower;
    dview->upper    = upper;
    dview->events   = 0;

    gncal_day_view_update (dview);

    return GTK_WIDGET (dview);
}

static void
gncal_day_view_realize (GtkWidget *widget)
{
    GdkWindowAttr attributes;
    gint attributes_mask;

    g_return_if_fail (widget != NULL);
    g_return_if_fail (GNCAL_IS_DAY_VIEW (widget));

    GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);

    attributes.window_type = GDK_WINDOW_CHILD;
    attributes.x = widget->allocation.x;
    attributes.y = widget->allocation.y;
    attributes.width = widget->allocation.width;
    attributes.height = widget->allocation.height;
    attributes.wclass = GDK_INPUT_OUTPUT;
    attributes.visual = gtk_widget_get_visual (widget);
    attributes.colormap = gtk_widget_get_colormap (widget);
    attributes.event_mask = (gtk_widget_get_events (widget)
                 | GDK_EXPOSURE_MASK
                 | GDK_BUTTON_PRESS_MASK);

    attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;

    widget->window = gdk_window_new (gtk_widget_get_parent_window (widget), &attributes, attributes_mask);
    gdk_window_set_user_data (widget->window, widget);

    widget->style = gtk_style_attach (widget->style, widget->window);

    gdk_window_set_background (widget->window, &widget->style->bg[GTK_STATE_PRELIGHT]);
}

static void
gncal_day_view_size_request (GtkWidget *widget, GtkRequisition *requisition)
{
    GncalDayView *dview;
    int str_width, width;

    g_return_if_fail (widget != NULL);
    g_return_if_fail (GNCAL_IS_DAY_VIEW (widget));
    g_return_if_fail (requisition != NULL);

    dview = GNCAL_DAY_VIEW (widget);

    /* border and min width */

    str_width = gdk_string_width (widget->style->font, dview->day_str);

    width = MAX (MIN_INFO_WIDTH, str_width);

    requisition->width = 2 * (widget->style->klass->xthickness + TEXT_BORDER) + width;
    requisition->height = 2 * (widget->style->klass->ythickness + TEXT_BORDER);

    /* division line */

    requisition->height += 2 * TEXT_BORDER + widget->style->klass->ythickness;

    /* title and at least one line of text */

    requisition->height += 2 * (widget->style->font->ascent + widget->style->font->descent);
}

static gint
gncal_day_view_expose (GtkWidget *widget, GdkEventExpose *event)
{
    GncalDayView *dview;
    int x1, y1, width, height;
    GdkRectangle rect, dest;
    GdkFont *font;
    int str_width;

    g_return_val_if_fail (widget != NULL, FALSE);
    g_return_val_if_fail (GNCAL_IS_DAY_VIEW (widget), FALSE);
    g_return_val_if_fail (event != NULL, FALSE);

    if (!GTK_WIDGET_DRAWABLE (widget))
        return FALSE;

    dview = GNCAL_DAY_VIEW (widget);

    x1 = widget->style->klass->xthickness;
    y1 = widget->style->klass->ythickness;
    width = widget->allocation.width - 2 * x1;
    height = widget->allocation.height - 2 * y1;

    /* Clear and paint frame shadow */

    gdk_window_clear_area (widget->window,
                   event->area.x, event->area.y,
                   event->area.width, event->area.height);

    gtk_draw_shadow (widget->style, widget->window,
             GTK_STATE_NORMAL, dview->shadow_type,
             0, 0,
             widget->allocation.width,
             widget->allocation.height);

    /* Clear and paint title */

    font = widget->style->font;

    rect.x = x1;
    rect.y = y1;
    rect.width = width;
    rect.height = 2 * TEXT_BORDER + font->ascent + font->descent;

    if (gdk_rectangle_intersect (&rect, &event->area, &dest)) {
        gdk_draw_rectangle (widget->window,
                    widget->style->bg_gc[GTK_STATE_NORMAL],
                    TRUE,
                    dest.x, dest.y,
                    dest.width, dest.height);

        dest = rect;

        dest.x += TEXT_BORDER;
        dest.y += TEXT_BORDER;
        dest.width -= 2 * TEXT_BORDER;
        dest.height -= 2 * TEXT_BORDER;

        gdk_gc_set_clip_rectangle (widget->style->fg_gc[GTK_STATE_NORMAL], &dest);

        str_width = gdk_string_width (font, dview->day_str);
        
        gdk_draw_string (widget->window,
                 font,
                 widget->style->fg_gc[GTK_STATE_NORMAL],
                 dest.x + (dest.width - str_width) / 2,
                 dest.y + font->ascent,
                 dview->day_str);

        gdk_gc_set_clip_rectangle (widget->style->fg_gc[GTK_STATE_NORMAL], NULL);
    }

    /* Division line */

    gtk_draw_hline (widget->style,
            widget->window,
            GTK_STATE_NORMAL,
            rect.x,
            rect.x + rect.width - 1,
            rect.y + rect.height);

    /* Text */

    rect.x = x1 + TEXT_BORDER;
    rect.y = y1 + 3 * TEXT_BORDER + font->ascent + font->descent + widget->style->klass->ythickness;
    rect.width = width - 2 * TEXT_BORDER;
    rect.height = height - (rect.y - y1) - TEXT_BORDER;

    if (gdk_rectangle_intersect (&rect, &event->area, &dest))
        view_utils_draw_events (widget,
                    widget->window,
                    widget->style->fg_gc[GTK_STATE_NORMAL],
                    &rect,
                    VIEW_UTILS_DRAW_END | VIEW_UTILS_DRAW_SPLIT,
                    dview->events,
                    dview->lower,
                    dview->upper);

    return FALSE;
}

void
gncal_day_view_update (GncalDayView *dview)
{
    struct tm tm;
    char buf[256];

    g_return_if_fail (dview != NULL);
    g_return_if_fail (GNCAL_IS_DAY_VIEW (dview));

    if (!dview->calendar->cal)
        return;
    
    if (dview->day_str)
        g_free (dview->day_str);

    tm = *localtime (&dview->lower);
    strftime (buf, sizeof (buf)-1, "%A %d", &tm);
    dview->day_str = g_strdup (buf);

    if (dview->events)
        g_list_free (dview->events);

    dview->events = calendar_get_events_in_range (dview->calendar->cal,
                              dview->lower,
                              dview->upper,
                              calendar_compare_by_dtstart);

    gtk_widget_draw (GTK_WIDGET (dview), NULL);
}

void
gncal_day_view_set_bounds (GncalDayView *dview, time_t lower, time_t upper)
{
    g_return_if_fail (dview != NULL);
    g_return_if_fail (GNCAL_IS_DAY_VIEW (dview));

    if ((lower != dview->lower) || (upper != dview->upper)) {
        dview->lower = lower;
        dview->upper = upper;

        gncal_day_view_update (dview);
    }
}

void
gncal_day_view_set_shadow (GncalDayView *dview, GtkShadowType shadow_type)
{
    g_return_if_fail (dview != NULL);
    g_return_if_fail (GNCAL_IS_DAY_VIEW (dview));

    if (shadow_type != dview->shadow_type) {
        dview->shadow_type = shadow_type;

        gtk_widget_draw (GTK_WIDGET (dview), NULL);
    }
}