/////////////////////////////////////////////////////////////////////////////
// Name:        misc.h
// Purpose:     Miscellaneous utilities for OGL
// Author:      Julian Smart
// Modified by:
// Created:     12/07/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifndef _OGL_MISC_H_
#define _OGL_MISC_H_

#ifdef __GNUG__
#pragma interface "misc.h"
#endif

// List to use when copying objects; may need to associate elements of new objects
// with elements of old objects, e.g. when copying constraint.s
extern wxList oglObjectCopyMapping;

/*
 * TEXT FORMATTING FUNCTIONS
 *
 */

// Centres the given list of wxShapeTextLine strings in the given box
// (changing the positions in situ). Doesn't actually draw into the DC.
void oglCentreText(wxDC& dc, wxList *text, double m_xpos, double m_ypos,
                double width, double height,
                int formatMode = FORMAT_CENTRE_HORIZ | FORMAT_CENTRE_VERT);

// Given a string, returns a list of strings that fit within the given
// width of box. Height is ignored.
wxStringList *oglFormatText(wxDC& dc, const wxString& text, double width, double height, int formatMode = 0);

// Centres the list of wxShapeTextLine strings, doesn't clip.
// Doesn't actually draw into the DC.
void oglCentreTextNoClipping(wxDC& dc, wxList *text_list,
                              double m_xpos, double m_ypos, double width, double height);

// Gets the maximum width and height of the given list of wxShapeTextLines.
void oglGetCentredTextExtent(wxDC& dc, wxList *text_list,
                              double m_xpos, double m_ypos, double width, double height,
                              double *actual_width, double *actual_height);

// Actually draw the preformatted list of wxShapeTextLines.
void oglDrawFormattedText(wxDC& context, wxList *text_list,
                       double m_xpos, double m_ypos, double width, double height,
                       int formatMode = FORMAT_CENTRE_HORIZ | FORMAT_CENTRE_VERT);

// Give it a list of points, finds the centre.
void oglFindPolylineCentroid(wxList *points, double *x, double *y);

void oglCheckLineIntersection(double x1, double y1, double x2, double y2, 
                             double x3, double y3, double x4, double y4,
                             double *ratio1, double *ratio2);

void oglFindEndForPolyline(double n, double xvec[], double yvec[], 
                           double x1, double y1, double x2, double y2, double *x3, double *y3);


void oglFindEndForBox(double width, double height, 
                      double x1, double y1,         // Centre of box (possibly)
                      double x2, double y2,         // other end of line
                      double *x3, double *y3);      // End on box edge

void oglFindEndForCircle(double radius, 
                         double x1, double y1,  // Centre of circle
                         double x2, double y2,  // Other end of line
                         double *x3, double *y3);

void oglGetArrowPoints(double x1, double y1, double x2, double y2,
                      double length, double width,
                      double *tip_x, double *tip_y,
                      double *side1_x, double *side1_y,
                      double *side2_x, double *side2_y);

/*
 * Given an ellipse and endpoints of a line, returns the point at which
 * the line touches the ellipse in values x4, y4.
 * This function assumes that the centre of the ellipse is at x1, y1, and the
 * ellipse has a width of a1 and a height of b1. It also assumes you are
 * wanting to draw an arc FROM point x2, y2 TOWARDS point x3, y3.
 * This function calculates the x,y coordinates of the intersection point of 
 * the arc with the ellipse.
 * Author: Ian Harrison
 */

void oglDrawArcToEllipse(double x1, double y1, double a1, double b1, double x2, double y2, double x3, double y3,
  double *x4, double *y4);

bool oglRoughlyEqual(double val1, double val2, double tol = 0.00001);

extern wxFont*          g_oglNormalFont;
extern wxPen*           g_oglBlackPen;
extern wxPen*           g_oglWhiteBackgroundPen;
extern wxPen*           g_oglTransparentPen;
extern wxBrush*         g_oglWhiteBackgroundBrush;
extern wxPen*           g_oglBlackForegroundPen;
extern wxCursor*        g_oglBullseyeCursor;

extern wxFont*          oglMatchFont(int point_size);

extern wxString         oglColourToHex(const wxColour& colour);
extern wxColour         oglHexToColour(const wxString& hex);
extern void             oglDecToHex(unsigned int dec, char *buf);
extern unsigned int     oglHexToDec(char* buf);


#endif
 // _OGL_MISC_H_