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7e668edf20
2008-12-15 Alexander Larsson <alexl@redhat.com>
* Makefile.am:
* acconfig.h:
* configure.in:
* eel/
* libnautilus-private/Makefile.am:
Import eel into nautilus.
svn path=/trunk/; revision=14815
106 lines
3.8 KiB
C
106 lines
3.8 KiB
C
/*
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* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation
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* All rights reserved.
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*
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* This file is part of the Gnome Library.
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*
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* The Gnome Library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* The Gnome Library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with the Gnome Library; see the file COPYING.LIB. If not,
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* write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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@NOTATION@
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*/
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/* Miscellaneous utility functions for the EelCanvas widget
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*
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* EelCanvas is basically a port of the Tk toolkit's most excellent canvas widget. Tk is
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* copyrighted by the Regents of the University of California, Sun Microsystems, and other parties.
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*
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* Author: Federico Mena <federico@nuclecu.unam.mx>
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*/
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#ifndef EEL_CANVAS_UTIL_H
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#define EEL_CANVAS_UTIL_H
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G_BEGIN_DECLS
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/* This structure defines an array of points. X coordinates are stored in the even-numbered
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* indices, and Y coordinates are stored in the odd-numbered indices. num_points indicates the
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* number of points, so the array is 2*num_points elements big.
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*/
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typedef struct {
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double *coords;
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int num_points;
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int ref_count;
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} EelCanvasPoints;
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/* Allocate a new EelCanvasPoints structure with enough space for the specified number of points */
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EelCanvasPoints *eel_canvas_points_new (int num_points);
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/* Increate ref count */
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EelCanvasPoints *eel_canvas_points_ref (EelCanvasPoints *points);
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#define eel_canvas_points_unref eel_canvas_points_free
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/* Decrease ref count and free structure if it has reached zero */
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void eel_canvas_points_free (EelCanvasPoints *points);
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/* Given three points forming an angle, compute the coordinates of the inside and outside points of
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* the mitered corner formed by a line of a given width at that angle.
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*
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* If the angle is less than 11 degrees, then FALSE is returned and the return points are not
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* modified. Otherwise, TRUE is returned.
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*/
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int eel_canvas_get_miter_points (double x1, double y1, double x2, double y2, double x3, double y3,
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double width,
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double *mx1, double *my1, double *mx2, double *my2);
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/* Compute the butt points of a line segment. If project is FALSE, then the results are as follows:
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*
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* -------------------* (bx1, by1)
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* |
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* (x1, y1) *------------------* (x2, y2)
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* |
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* -------------------* (bx2, by2)
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*
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* that is, the line is not projected beyond (x2, y2). If project is TRUE, then the results are as
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* follows:
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*
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* -------------------* (bx1, by1)
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* (x2, y2) |
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* (x1, y1) *-------------* |
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* |
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* -------------------* (bx2, by2)
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*/
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void eel_canvas_get_butt_points (double x1, double y1, double x2, double y2,
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double width, int project,
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double *bx1, double *by1, double *bx2, double *by2);
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/* Calculate the distance from a polygon to a point. The polygon's X coordinates are in the even
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* indices of the poly array, and the Y coordinates are in the odd indices.
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*/
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double eel_canvas_polygon_to_point (double *poly, int num_points, double x, double y);
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void eel_canvas_item_reset_bounds (EelCanvasItem *item);
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/* Sets the bbox to the new value, requesting full repaint. */
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void eel_canvas_update_bbox (EelCanvasItem *item, int x1, int y1, int x2, int y2);
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G_END_DECLS
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#endif
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