91 lines
2.7 KiB
C
91 lines
2.7 KiB
C
/*
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* Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** \file
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* Scroll widget (interface).
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*/
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#ifndef _NETSURF_DESKTOP_SCROLL_H_
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#define _NETSURF_DESKTOP_SCROLL_H_
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#include <stdbool.h>
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#include "desktop/browser.h"
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#define SCROLLBAR_WIDTH 16
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struct scroll;
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typedef enum {
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SCROLL_MSG_REDRAW, /* the scrollbar requests a redraw */
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SCROLL_MSG_MOVED, /* the scroll value has changed */
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SCROLL_MSG_SCROLL_START, /* a scroll drag has started, all mouse
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* events should be passed to
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* the scrollbar regardless of the
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* coordinates
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*/
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SCROLL_MSG_SCROLL_FINISHED, /* cancel the above */
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} scroll_msg;
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struct scroll_msg_data {
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struct scroll *scroll;
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scroll_msg msg;
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int new_scroll;
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int x0, y0, x1, y1;
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};
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/**
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* Client callback for the scroll.
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*
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* \param client_data user data passed at scroll creation
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* \param scroll_data struct all necessary message data
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*/
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typedef void(*scroll_client_callback)(void *client_data,
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struct scroll_msg_data *scroll_data);
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bool scroll_create(bool horizontal, int length,
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int scrolled_dimension, int scrolled_visible,
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void *client_data, scroll_client_callback client_callback,
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struct scroll **scroll_pt);
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void scroll_destroy(struct scroll *scroll);
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bool scroll_redraw(struct scroll *scroll, int x, int y,
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int clip_x0, int clip_y0, int clip_x1, int clip_y1,
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float scale);
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void scroll_set(struct scroll *scroll, int scroll_val, bool bar);
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int scroll_get_offset(struct scroll *scroll);
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void scroll_set_extents(struct scroll *scroll, int length,
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int scrolled_visible, int scrolled_dimension);
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bool scroll_is_horizontal(struct scroll *scroll);
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const char *scroll_mouse_action(struct scroll *scroll,
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browser_mouse_state mouse, int x, int y);
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void scroll_mouse_drag_end(struct scroll *scroll, browser_mouse_state mouse,
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int x, int y);
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void scroll_start_content_drag(struct scroll *scroll, int x, int y);
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void scroll_make_pair(struct scroll *horizontal_scroll,
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struct scroll *vertical_scroll);
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void *scroll_get_data(struct scroll *scroll);
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#endif
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