/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* gnome-icon-container-private.h

   Copyright (C) 1999, 2000 Free Software Foundation
   Copyright (C) 2000 Eazel, Inc.

   The Gnome Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The Gnome Library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the Gnome Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.

   Author: Ettore Perazzoli <ettore@gnu.org>
*/

#ifndef GNOME_ICON_CONTAINER_PRIVATE_H
#define GNOME_ICON_CONTAINER_PRIVATE_H

#include "gnome-icon-container.h"
#include "gnome-icon-container-dnd.h"
#include "nautilus-icon-factory.h"
#include "nautilus-icons-view-icon-item.h"

/* An Icon. */

typedef struct {
	/* Canvas item for the icon. */
	NautilusIconsViewIconItem *item;

	/* X/Y coordinates. */
	double x, y;
	
	/* Scale factor (stretches icon). */
	double scale;
	
	/* Whether this item is selected for operation. */
	gboolean is_selected : 1;

	/* Whether this item is selected for keyboard navigation. */
	gboolean is_current : 1;

	/* Whether this item has been repositioned during layout already. */
	gboolean layout_done : 1;

	/* Whether this item was selected before rubberbanding. */
	gboolean was_selected_before_rubberband : 1;

	NautilusControllerIcon *data;
} GnomeIconContainerIcon;



#define INITIAL_GRID_WIDTH 64
#define INITIAL_GRID_HEIGHT 64

typedef struct {
	/* Size of the grid. */
	guint width, height;

	/* This is the width that we can actually use for finding an empty
	 * position.
	 */
	guint visible_width;

	/* Array of grid elements. */
	GList **elems;

	/* Size of the allocated array. */
	guint alloc_width, alloc_height;

	/* Position of the first free cell (used to speed up progressive
	 * updates). If negative, there is no free cell.
	 */
	int first_free_x, first_free_y;
} GnomeIconContainerIconGrid;



/* Private GnomeIconContainer members. */

typedef struct {
	gboolean active;

	double start_x, start_y;

	GnomeCanvasItem *selection_rectangle;
	guint timer_id;

	guint prev_x, prev_y;
	guint prev_x1, prev_y1;
	guint prev_x2, prev_y2;
} GnomeIconContainerRubberbandInfo;

typedef enum {
	DRAG_ACTION_MOVE_OR_COPY,
	DRAG_ACTION_STRETCH
} DragAction;

typedef struct {
	/* Pointer position in canvas coordinates. */
	int pointer_x, pointer_y;

	/* Icon top, left, and size in canvas coordinates. */
	int icon_x, icon_y;
	guint icon_size;
} StretchState;

struct _GnomeIconContainerDetails {
	NautilusIconsController *controller;

	/* linger selection mode setting. */
	gboolean linger_selection_mode;

	/* single-click mode setting */
	gboolean single_click_mode;
	
	/* List of icons. */
	GList *icons;
	guint num_icons;

	/* The grid. */
	GnomeIconContainerIconGrid *grid;

	/* FIXME: This is *ugly*, but more efficient (both memory- and
	   speed-wise) than using gtk_object_{set,get}_data() for all the
	   icon items. */
	GHashTable *canvas_item_to_icon;

	/* Current icon for keyboard navigation. */
	GnomeIconContainerIcon *kbd_current;

	/* Current icon with stretch handles, so we have only one. */
	GnomeIconContainerIcon *stretch_icon;

	/* Rubberbanding status. */
	GnomeIconContainerRubberbandInfo rubberband_info;

	/* Timeout used to make a selected icon fully visible after a short
	 * period of time. (The timeout is needed to make sure
	 * double-clicking still works.)
	 */
	guint kbd_icon_visibility_timer_id;

	/* Remembered information about the start of the current event. */
	guint32 button_down_time;

	/* Drag state. Valid only if drag_button is non-zero. */
	guint drag_button;
	GnomeIconContainerIcon *drag_icon;
	int drag_x, drag_y;
	DragAction drag_action;
	gboolean drag_started;
	StretchState stretch_start;

	/* Idle ID. */
	guint idle_id;

	/* Timeout for selection in browser mode. */
	guint linger_selection_mode_timer_id;

	/* Icon to be selected at timeout in browser mode. */
	GnomeIconContainerIcon *linger_selection_mode_icon;

	/* DnD info. */
	GnomeIconContainerDndInfo *dnd_info;

	/* zoom level */
	int zoom_level;
	
	/* default fonts used to draw labels */
	GdkFont *label_font[NAUTILUS_ZOOM_LEVEL_LARGEST + 1];
};

/* Layout and icon size constants.
   These will change based on the zoom level eventually, so they
   should probably become function calls instead of macros.
*/

#define GNOME_ICON_CONTAINER_CELL_WIDTH(container)     80
#define GNOME_ICON_CONTAINER_CELL_HEIGHT(container)    80

#define GNOME_ICON_CONTAINER_CELL_SPACING(container)    4

#define GNOME_ICON_CONTAINER_ICON_WIDTH(container)     NAUTILUS_ICON_LEVEL_STANDARD
#define GNOME_ICON_CONTAINER_ICON_HEIGHT(container)    NAUTILUS_ICON_LEVEL_STANDARD

/* Private functions shared by mutiple files. */
GnomeIconContainerIcon *gnome_icon_container_get_icon_by_uri             (GnomeIconContainer     *container,
									  const char             *uri);
void                    gnome_icon_container_move_icon                   (GnomeIconContainer     *container,
									  GnomeIconContainerIcon *icon,
									  int                     x,
									  int                     y,
									  gboolean                raise);
void                    gnome_icon_container_select_list_unselect_others (GnomeIconContainer     *container,
									  GList                  *icons);

#endif /* GNOME_ICON_CONTAINER_PRIVATE_H */