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/*
* Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf 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; version 2 of the License.
*
* NetSurf 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, see <http://www.gnu.org/licenses/>.
*/
/** \file
* Scrollbar widget (interface).
*/
#ifndef _NETSURF_DESKTOP_SCROLLBAR_H_
#define _NETSURF_DESKTOP_SCROLLBAR_H_
#include <stdbool.h>
#include "desktop/browser.h"
#define SCROLLBAR_WIDTH 16
struct scrollbar;
typedef enum {
SCROLLBAR_MSG_REDRAW, /* the scrollbar requests a redraw */
SCROLLBAR_MSG_MOVED, /* the scroll value has changed */
SCROLLBAR_MSG_SCROLL_START, /* a scrollbar drag has started, all
* mouse events should be passed to
* the scrollbar regardless of the
* coordinates
*/
SCROLLBAR_MSG_SCROLL_FINISHED, /* cancel the above */
} scrollbar_msg;
struct scrollbar_msg_data {
struct scrollbar *scrollbar;
scrollbar_msg msg;
int new_scroll;
int x0, y0, x1, y1;
};
/**
* Client callback for the scrollbar.
*
* \param client_data user data passed at scroll creation
* \param scrollbar_data scrollbar message data
*/
typedef void(*scrollbar_client_callback)(void *client_data,
struct scrollbar_msg_data *scrollbar_data);
bool scrollbar_create(bool horizontal, int length, int full_size,
int visible_size, void *client_data,
scrollbar_client_callback client_callback,
struct scrollbar **s);
void scrollbar_destroy(struct scrollbar *s);
bool scrollbar_redraw(struct scrollbar *s, int x, int y,
const struct rect *clip, float scale);
void scrollbar_set(struct scrollbar *s, int value, bool bar_pos);
int scrollbar_get_offset(struct scrollbar *s);
void scrollbar_set_extents(struct scrollbar *s, int length,
int visible_size, int full_size);
bool scrollbar_is_horizontal(struct scrollbar *s);
const char *scrollbar_mouse_action(struct scrollbar *s,
browser_mouse_state mouse, int x, int y);
void scrollbar_mouse_drag_end(struct scrollbar *s,
browser_mouse_state mouse, int x, int y);
void scrollbar_start_content_drag(struct scrollbar *s, int x, int y);
void scrollbar_make_pair(struct scrollbar *horizontal,
struct scrollbar *vertical);
void *scrollbar_get_data(struct scrollbar *s);
#endif
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