1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Defines a simple integer vector class. This class is used to indicate a 6 // distance in two dimensions between two points. Subtracting two points should 7 // produce a vector, and adding a vector to a point produces the point at the 8 // vector's distance from the original point. 9 10 #ifndef UI_GFX_VECTOR2D_H_ 11 #define UI_GFX_VECTOR2D_H_ 12 13 #include <string> 14 15 #include "base/basictypes.h" 16 #include "ui/gfx/gfx_export.h" 17 #include "ui/gfx/vector2d_f.h" 18 19 namespace gfx { 20 21 class GFX_EXPORT Vector2d { 22 public: Vector2d()23 Vector2d() : x_(0), y_(0) {} Vector2d(int x,int y)24 Vector2d(int x, int y) : x_(x), y_(y) {} 25 x()26 int x() const { return x_; } set_x(int x)27 void set_x(int x) { x_ = x; } 28 y()29 int y() const { return y_; } set_y(int y)30 void set_y(int y) { y_ = y; } 31 32 // True if both components of the vector are 0. 33 bool IsZero() const; 34 35 // Add the components of the |other| vector to the current vector. 36 void Add(const Vector2d& other); 37 // Subtract the components of the |other| vector from the current vector. 38 void Subtract(const Vector2d& other); 39 40 void operator+=(const Vector2d& other) { Add(other); } 41 void operator-=(const Vector2d& other) { Subtract(other); } 42 SetToMin(const Vector2d & other)43 void SetToMin(const Vector2d& other) { 44 x_ = x_ <= other.x_ ? x_ : other.x_; 45 y_ = y_ <= other.y_ ? y_ : other.y_; 46 } 47 SetToMax(const Vector2d & other)48 void SetToMax(const Vector2d& other) { 49 x_ = x_ >= other.x_ ? x_ : other.x_; 50 y_ = y_ >= other.y_ ? y_ : other.y_; 51 } 52 53 // Gives the square of the diagonal length of the vector. Since this is 54 // cheaper to compute than Length(), it is useful when you want to compare 55 // relative lengths of different vectors without needing the actual lengths. 56 int64 LengthSquared() const; 57 // Gives the diagonal length of the vector. 58 float Length() const; 59 60 std::string ToString() const; 61 Vector2dF()62 operator Vector2dF() const { return Vector2dF(x_, y_); } 63 64 private: 65 int x_; 66 int y_; 67 }; 68 69 inline bool operator==(const Vector2d& lhs, const Vector2d& rhs) { 70 return lhs.x() == rhs.x() && lhs.y() == rhs.y(); 71 } 72 73 inline Vector2d operator-(const Vector2d& v) { 74 return Vector2d(-v.x(), -v.y()); 75 } 76 77 inline Vector2d operator+(const Vector2d& lhs, const Vector2d& rhs) { 78 Vector2d result = lhs; 79 result.Add(rhs); 80 return result; 81 } 82 83 inline Vector2d operator-(const Vector2d& lhs, const Vector2d& rhs) { 84 Vector2d result = lhs; 85 result.Add(-rhs); 86 return result; 87 } 88 89 } // namespace gfx 90 91 #endif // UI_GFX_VECTOR2D_H_ 92