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rect.h

00001 /*
00002   libwftk - Worldforge Toolkit - a widget library
00003   Copyright (C) 2002 Malcolm Walker <malcolm@worldforge.org>
00004   Based on code copyright  (C) 1999-2002  Karsten Laux
00005 
00006   This library is free software; you can redistribute it and/or
00007   modify it under the terms of the GNU Lesser General Public
00008   License as published by the Free Software Foundation; either
00009   version 2.1 of the License, or (at your option) any later version.
00010   
00011   This library is distributed in the hope that it will be useful,
00012   but WITHOUT ANY WARRANTY; without even the implied warranty of
00013   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00014   Lesser General Public License for more details.
00015   
00016   You should have received a copy of the GNU Lesser General Public
00017   License along with this library; if not, write to the
00018   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00019   Boston, MA  02111-1307, SA.
00020 */
00021 
00022 #ifndef _RECT_H
00023 #define _RECT_H
00024 
00025 #include <SDL/SDL.h>
00026 
00027 #include <wftk/point.h>
00028 
00029 namespace wftk {
00030 
00032 class Rect : public SDL_Rect
00033 {
00034  public:
00035   
00037   Rect() : valid_(true) {x = y = 0; w = h = 0;}
00039   Rect(int x_, int y_, int w_, int h_);
00041   explicit Rect( const SDL_Rect& r) : SDL_Rect(r), valid_(true) {}
00043 //  Rect( const Point& upperLeft, const Point& lowerRight);
00045   ~Rect() {}
00046 
00048   static Rect invalid;
00050   static Rect empty;
00052   bool isEmpty() const {return w == 0 && h == 0;}
00054   bool isValid() const {return valid_;}
00056   void setValid(bool val = true) {valid_ = val;}
00058   bool contains( const Point &p ) const;
00060   bool contains( const Rect &r )  const;
00061 
00063   void translate( int dx, int dy );
00065   void translate(const Point& p) {translate(p.x, p.y);}
00067   void warp(const Point &newOrigin);
00069   void resize(int w_, int h_);
00071   Rect unite( const Rect &r )    const;
00073 
00076   Rect intersect( const Rect &r) const;  
00077 
00079   Point upperLeft() const { return origin(); }
00080 
00082   Point origin() const {return Point(x, y);}
00084   Uint16 width() const {return w;}
00086   Uint16 height() const {return h;}
00087 
00089   friend bool operator==(const Rect &p, const Rect &q)
00090     {return p.x == q.x && p.y == q.y && p.w == q.w && p.h == q.h;}
00091          
00093   friend bool operator!=(const Rect &p, const Rect &q) {return !(p == q);}
00094   
00096   friend bool operator<(const Rect &p, const Rect &q)
00097     {return p.x < q.x || (p.x == q.x &&
00098            (p.y < q.y || (p.y == q.y &&
00099            (p.w < q.w || (p.w == q.w && p.h < q.h)))));} 
00100  
00102   friend std::ostream& operator<<(std::ostream& s, const Rect& p);       
00103  
00104  private:
00106   bool valid_;
00107 };
00108 
00109 } // namespace wftk
00110 
00111 #endif // _RECT_H

Generated Tue Apr 12 22:48:51 2005.
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