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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-summary-titlebar.c
 *
 * Authors: Iain Holmes <iain@helixcode.com>
 *
 * Copyright (C) 2000  Helix Code, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * 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.
 */

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

#include <gnome.h>
#include <gal/util/e-util.h>
#include <gal/widgets/e-font.h>

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

#include <gdk-pixbuf/gdk-pixbuf.h>

#include "e-summary-titlebar.h"
#include "e-summary-title-button.h"

/* XPMS */
#include "edit.xpm"
#include "x.xpm"
#include "shade.xpm"

#define PARENT_TYPE (gnome_canvas_group_get_type ())
#define TITLEBAR_BORDER_WIDTH 2

enum {
    ARG_0,
    ARG_TEXT,
    ARG_WIDTH,
    ARG_HEIGHT
};

enum {
    EDIT,
    SHADE,
    CLOSE,
    LAST_SIGNAL
};

static void e_summary_titlebar_destroy (GtkObject *object);
static void e_summary_titlebar_class_init (GtkObjectClass *object_class);
static void e_summary_titlebar_init (GtkObject *object);

static GnomeCanvasGroupClass *parent_class;
static guint titlebar_signals[LAST_SIGNAL] = { 0 };

struct _ESummaryTitlebarPrivate {
    GnomeCanvasItem *rect;
    GnomeCanvasItem *titletext;
    
    GnomeCanvasItem *edit;
    GnomeCanvasItem *shade;
    GnomeCanvasItem *close;
    
    char *text;
    double width, height;
};

static void
e_summary_titlebar_destroy (GtkObject *object)
{
    ESummaryTitlebar *titlebar;
    ESummaryTitlebarPrivate *priv;
    
    titlebar = E_SUMMARY_TITLEBAR (object);
    priv = titlebar->private;
    
    if (priv == NULL)
        return;
    
    g_free (priv);
    titlebar->private = NULL;
    
    if (GTK_OBJECT_CLASS (parent_class)->destroy)
        (* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}

static void
edit_cb (GnomeCanvasItem *item,
     ESummaryTitlebar *titlebar)
{
    gtk_signal_emit (GTK_OBJECT (titlebar), titlebar_signals[EDIT]);
}

static void
shade_cb (GnomeCanvasItem *item,
      ESummaryTitlebar *titlebar)
{
    gtk_signal_emit (GTK_OBJECT (titlebar), titlebar_signals[SHADE]);
}

static void
close_cb (GnomeCanvasItem *item,
      ESummaryTitlebar *titlebar)
{
    gtk_signal_emit (GTK_OBJECT (titlebar), titlebar_signals[CLOSE]);
}

static void
e_summary_titlebar_realize (GnomeCanvasItem *item)
{
    GnomeCanvasGroup *group;
    ESummaryTitlebar *titlebar;
    ESummaryTitlebarPrivate *priv;
    GdkPixbuf *pb;
    EFont *font;
    int font_height;
    
    group = GNOME_CANVAS_GROUP (item);
    titlebar = E_SUMMARY_TITLEBAR (item);
    priv = titlebar->private;
    
    font = e_font_from_gdk_font (GTK_WIDGET (item->canvas)->style->font);
    font_height = e_font_height (font);
    priv->height = 18 + 2 * TITLEBAR_BORDER_WIDTH; /* FIXME: Not hardcoded */
    
    priv->rect = gnome_canvas_item_new (group,
                        gnome_canvas_rect_get_type (),
                        "x1", 0.0,
                        "y1", 0.0,
                        "y2", (double) priv->height,
                        "x2", priv->width, 
                        "fill_color_rgba", 0x88AAFFFF,
                        NULL);
    
    pb = gdk_pixbuf_new_from_xpm_data ((const char**) x_xpm);
    priv->close = gnome_canvas_item_new (group,
                         e_summary_title_button_get_type (),
                         "x", (double) priv->width - TITLEBAR_BORDER_WIDTH - 18,
                         "y", (double) TITLEBAR_BORDER_WIDTH,
                         "pixbuf", pb,
                         NULL);
    gdk_pixbuf_unref (pb);
    gtk_signal_connect (GTK_OBJECT (priv->close), "clicked",
                GTK_SIGNAL_FUNC (close_cb), titlebar);
    
    pb = gdk_pixbuf_new_from_xpm_data ((const char**) shade_xpm);
    priv->shade = gnome_canvas_item_new (group,
                         e_summary_title_button_get_type (),
                         "x", (double) priv->width - (TITLEBAR_BORDER_WIDTH * 2) - 36,
                         "y", (double) TITLEBAR_BORDER_WIDTH,
                         "pixbuf", pb,
                         NULL);
    gdk_pixbuf_unref (pb);
    gtk_signal_connect (GTK_OBJECT (priv->shade), "clicked",
                GTK_SIGNAL_FUNC (shade_cb), titlebar);
    
    pb = gdk_pixbuf_new_from_xpm_data ((const char**) edit_xpm);
    priv->edit = gnome_canvas_item_new (group,
                        e_summary_title_button_get_type (),
                        "x", (double) priv->width - (TITLEBAR_BORDER_WIDTH * 3) - 54,
                        "y", (double) TITLEBAR_BORDER_WIDTH,
                        "pixbuf", pb,
                        NULL);
    gdk_pixbuf_unref (pb);
    gtk_signal_connect (GTK_OBJECT (priv->edit), "clicked",
                GTK_SIGNAL_FUNC (edit_cb), titlebar);
    
    priv->titletext = gnome_canvas_item_new (group,
                         e_text_get_type (),
                         "text", priv->text,
                         "font_gdk", GTK_WIDGET (item->canvas)->style->font,
                         "clip_width", (double) priv->width - 
                         (TITLEBAR_BORDER_WIDTH*4)- 50,
                         "clip_height", (double) e_font_height (font),

                         "clip", TRUE,
                         "use_ellipsis", TRUE,
                         "fill_color", "black",
                         "anchor", GTK_ANCHOR_NW,
                         "draw_background", FALSE,
                         NULL);
    gnome_canvas_item_move (priv->titletext, TITLEBAR_BORDER_WIDTH,
                (priv->height - font_height) / 2);
    
    if (GNOME_CANVAS_ITEM_CLASS (parent_class)->realize)
        (* GNOME_CANVAS_ITEM_CLASS (parent_class)->realize) (item);
}

static void
e_summary_titlebar_unrealize (GnomeCanvasItem *item)
{
    if (GNOME_CANVAS_ITEM_CLASS (parent_class)->unrealize)
        (* GNOME_CANVAS_ITEM_CLASS (parent_class)->unrealize) (item);
}

static void
e_summary_titlebar_set_arg (GtkObject *object,
                GtkArg *arg,
                guint arg_id)
{
    ESummaryTitlebar *titlebar;
    ESummaryTitlebarPrivate *priv;
    
    titlebar = E_SUMMARY_TITLEBAR (object);
    priv = titlebar->private;
    
    switch (arg_id) {
    case ARG_TEXT:
        if (priv->text)
            g_free (priv->text);
        
        priv->text = g_strdup (GTK_VALUE_STRING (*arg));
        
        if (priv->titletext)
            gnome_canvas_item_set (priv->titletext,
                           "text", priv->text,
                           NULL);
        break;
        
    case ARG_WIDTH:
        priv->width = GTK_VALUE_DOUBLE (*arg);
        
        if (priv->rect)
            gnome_canvas_item_set (priv->rect,
                           "x2", priv->width,
                           NULL);
        if (priv->titletext)
            gnome_canvas_item_set (priv->titletext,
                           "clip_width", priv->width - 
                           (TITLEBAR_BORDER_WIDTH* 4) - 42,
                           NULL);
        break;
        
    default:
        break;
    }
}

static void
e_summary_titlebar_get_arg (GtkObject *object,
                GtkArg *arg,
                guint arg_id)
{
    ESummaryTitlebar *titlebar;
    ESummaryTitlebarPrivate *priv;
    
    titlebar = E_SUMMARY_TITLEBAR (object);
    priv = titlebar->private;
    
    switch (arg_id) {
    case ARG_TEXT:
        GTK_VALUE_STRING (*arg) = priv->text;
        break;
        
    case ARG_WIDTH:
        GTK_VALUE_DOUBLE (*arg) = priv->width;
        break;
        
    case ARG_HEIGHT:
        GTK_VALUE_DOUBLE (*arg) = priv->height;
        break;
        
    default:
        arg->type = GTK_TYPE_INVALID;
        break;
    }
}

static gint
e_summary_titlebar_event (GnomeCanvasItem *item,
              GdkEvent *event)
{
    if (event->type == GDK_2BUTTON_PRESS &&
        event->button.button == 1) {
        gtk_signal_emit (GTK_OBJECT (item), titlebar_signals[SHADE]);
        return FALSE;
    } else {
        return TRUE;
    }
}

static double
e_summary_titlebar_point (GnomeCanvasItem *item,
              double x,
              double y,
              int cx,
              int cy,
              GnomeCanvasItem **actual_item)
{
    ESummaryTitlebar *est;
    ESummaryTitlebarPrivate *priv;
    GnomeCanvasItem *ret_item;
    double d;

    est = E_SUMMARY_TITLEBAR (item);
    priv = est->private;

    d = (* GNOME_CANVAS_ITEM_CLASS 
         (GTK_OBJECT (priv->edit)->klass)->point) (priv->edit,
                               x, y, 
                               cx, cy,
                               &ret_item);
    if (d == 0.0) {
        *actual_item = ret_item;
        return 0.0;
    }

    d = (* GNOME_CANVAS_ITEM_CLASS 
         (GTK_OBJECT (priv->shade)->klass)->point) (priv->shade,
                            x, y,
                            cx, cy,
                            &ret_item);
    if (d == 0.0) {
        *actual_item = ret_item;
        return 0.0;
    }

    d = (* GNOME_CANVAS_ITEM_CLASS
         (GTK_OBJECT (priv->close)->klass)->point) (priv->close,
                            x, y,
                            cx, cy,
                            &ret_item);
    if (d == 0.0) {
        *actual_item = ret_item;
        return 0.0;
    }

    *actual_item = item;
    return 0.0;
}

static void
e_summary_titlebar_class_init (GtkObjectClass *object_class)
{
    GnomeCanvasItemClass *item_class;
    
    item_class = (GnomeCanvasItemClass *) object_class;
    
    object_class->destroy = e_summary_titlebar_destroy;
    object_class->set_arg = e_summary_titlebar_set_arg;
    object_class->get_arg = e_summary_titlebar_get_arg;
    
    item_class->realize = e_summary_titlebar_realize;
    item_class->unrealize = e_summary_titlebar_unrealize;
    item_class->event = e_summary_titlebar_event;
    item_class->point = e_summary_titlebar_point;
    
    gtk_object_add_arg_type ("ESummaryTitlebar::text",
                 GTK_TYPE_STRING, GTK_ARG_READWRITE,
                 ARG_TEXT);
    gtk_object_add_arg_type ("ESummaryTitlebar::width",
                 GTK_TYPE_DOUBLE, GTK_ARG_READWRITE,
                 ARG_WIDTH);
    gtk_object_add_arg_type ("ESummaryTitlebar::height",
                 GTK_TYPE_DOUBLE, GTK_ARG_READABLE,
                 ARG_HEIGHT);
    
    titlebar_signals[EDIT] = gtk_signal_new ("edit", GTK_RUN_LAST,
                         object_class->type,
                         GTK_SIGNAL_OFFSET (ESummaryTitlebarClass,
                                    edit),
                         gtk_marshal_NONE__NONE,
                         GTK_TYPE_NONE, 0);
    titlebar_signals[SHADE] = gtk_signal_new ("shade", GTK_RUN_LAST,
                          object_class->type,
                          GTK_SIGNAL_OFFSET (ESummaryTitlebarClass,
                                     shade),
                          gtk_marshal_NONE__NONE,
                          GTK_TYPE_NONE, 0);
    titlebar_signals[CLOSE] = gtk_signal_new ("close", GTK_RUN_LAST,
                          object_class->type,
                          GTK_SIGNAL_OFFSET (ESummaryTitlebarClass,
                                     close),
                          gtk_marshal_NONE__NONE,
                          GTK_TYPE_NONE, 0);
    gtk_object_class_add_signals (object_class, titlebar_signals,
                      LAST_SIGNAL);
    
    parent_class = gtk_type_class (PARENT_TYPE);
}

static void
e_summary_titlebar_init (GtkObject *object)
{
    ESummaryTitlebar *titlebar;
    ESummaryTitlebarPrivate *priv;
    
    titlebar = E_SUMMARY_TITLEBAR (object);
    titlebar->private = g_new0 (ESummaryTitlebarPrivate, 1);
    priv = titlebar->private;
    
    priv->width = 100.0;
    priv->text = NULL;
    
    gdk_rgb_init ();
}

E_MAKE_TYPE (e_summary_titlebar, "ESummaryTitlebar", ESummaryTitlebar,
         e_summary_titlebar_class_init, e_summary_titlebar_init,
         PARENT_TYPE);