00001 /* 00002 libwt - Vassilis Virvilis Toolkit - a widget library 00003 Copyright (C) 2006 Vassilis Virvilis <vasvir2@fastmail.fm> 00004 00005 This library is free software; you can redistribute it and/or 00006 modify it under the terms of the GNU Lesser General Public 00007 License as published by the Free Software Foundation; either 00008 version 2.1 of the License, or (at your option) any later version. 00009 00010 This library is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 Lesser General Public License for more details. 00014 00015 You should have received a copy of the GNU Lesser General Public 00016 License along with this library; if not, write to the 00017 Free Software Foundation, Inc., 59 Temple Place - Suite 330, 00018 Boston, MA 02111-1307, SA. 00019 */ 00020 00021 #ifndef WT_POINT_H 00022 #define WT_POINT_H 00023 00024 #include <iosfwd> 00025 #include <vector> 00026 00027 namespace Wt { 00028 00029 /// Class to handle x,y - points on the screen 00030 class Point { 00031 public: 00032 /// Construct a point at (0, 0) 00033 Point() : x_(0), y_(0) {} 00034 00035 /// Construct a point 00036 Point(int x_, int y_) : x_(x_), y_(y_) {} 00037 00038 int x() const { 00039 return x_; 00040 } 00041 00042 int y() const { 00043 return y_; 00044 } 00045 00046 void setX(int x_new) { 00047 x_ = x_new; 00048 } 00049 00050 void setY(int y_new) { 00051 y_ = y_new; 00052 } 00053 00054 /// Shift a point 00055 Point& operator+=(const Point& other) { 00056 x_ += other.x_; 00057 y_ += other.y_; 00058 return *this; 00059 } 00060 00061 /// Shift a point 00062 Point& operator-=(const Point& other) { 00063 x_ -= other.x_; 00064 y_ -= other.y_; 00065 return *this; 00066 } 00067 00068 /// Return a shifted point 00069 Point operator+(const Point& other) const { 00070 return Point(x_ + other.x_, y_ + other.y_); 00071 } 00072 00073 /// Return a shifted point 00074 Point operator-(const Point& other) const { 00075 return Point(x_ - other.x_, y_ - other.y_); 00076 } 00077 00078 /// return the negative of a point 00079 Point operator-() const { 00080 return Point(-x_, -y_); 00081 } 00082 00083 /// Compare two points 00084 bool operator==(const Point &other) const { 00085 return (x_ == other.x_) && (y_ == other.y_); 00086 } 00087 00088 /// Compare two points 00089 bool operator!=(const Point &other) const { 00090 return !(*this == other); 00091 } 00092 00093 private: 00094 /// The point's x coordinate 00095 int x_; 00096 /// The point's y coordinate 00097 int y_; 00098 }; 00099 00100 /// Print a point to a stream 00101 std::ostream& operator<<(std::ostream& s, const Point& p); 00102 00103 typedef std::vector<Point> PointArray; 00104 00105 } // namespace Wt 00106 00107 #endif // WT_POINT_H
This document is licensed under the terms of the GNU Free Documentation License and may be freely distributed under the conditions given by this license.