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_GEOMETRY_VECTOR2D_H_ 11 #define UI_GFX_GEOMETRY_VECTOR2D_H_ 12 13 #include <iosfwd> 14 #include <string> 15 16 #include "base/basictypes.h" 17 #include "ui/gfx/geometry/vector2d_f.h" 18 #include "ui/gfx/gfx_export.h" 19 20 namespace gfx { 21 22 class GFX_EXPORT Vector2d { 23 public: 24 Vector2d() : x_(0), y_(0) {} 25 Vector2d(int x, int y) : x_(x), y_(y) {} 26 27 int x() const { return x_; } 28 void set_x(int x) { x_ = x; } 29 30 int y() const { return y_; } 31 void set_y(int y) { y_ = y; } 32 33 // True if both components of the vector are 0. 34 bool IsZero() const; 35 36 // Add the components of the |other| vector to the current vector. 37 void Add(const Vector2d& other); 38 // Subtract the components of the |other| vector from the current vector. 39 void Subtract(const Vector2d& other); 40 41 void operator+=(const Vector2d& other) { Add(other); } 42 void operator-=(const Vector2d& other) { Subtract(other); } 43 44 void SetToMin(const Vector2d& other) { 45 x_ = x_ <= other.x_ ? x_ : other.x_; 46 y_ = y_ <= other.y_ ? y_ : other.y_; 47 } 48 49 void SetToMax(const Vector2d& other) { 50 x_ = x_ >= other.x_ ? x_ : other.x_; 51 y_ = y_ >= other.y_ ? y_ : other.y_; 52 } 53 54 // Gives the square of the diagonal length of the vector. Since this is 55 // cheaper to compute than Length(), it is useful when you want to compare 56 // relative lengths of different vectors without needing the actual lengths. 57 int64 LengthSquared() const; 58 // Gives the diagonal length of the vector. 59 float Length() const; 60 61 std::string ToString() const; 62 63 operator Vector2dF() const { return Vector2dF(x_, y_); } 64 65 private: 66 int x_; 67 int y_; 68 }; 69 70 inline bool operator==(const Vector2d& lhs, const Vector2d& rhs) { 71 return lhs.x() == rhs.x() && lhs.y() == rhs.y(); 72 } 73 74 inline Vector2d operator-(const Vector2d& v) { 75 return Vector2d(-v.x(), -v.y()); 76 } 77 78 inline Vector2d operator+(const Vector2d& lhs, const Vector2d& rhs) { 79 Vector2d result = lhs; 80 result.Add(rhs); 81 return result; 82 } 83 84 inline Vector2d operator-(const Vector2d& lhs, const Vector2d& rhs) { 85 Vector2d result = lhs; 86 result.Add(-rhs); 87 return result; 88 } 89 90 // This is declared here for use in gtest-based unit tests but is defined in 91 // the gfx_test_support target. Depend on that to use this in your unit test. 92 // This should not be used in production code - call ToString() instead. 93 void PrintTo(const Vector2d& vector, ::std::ostream* os); 94 95 } // namespace gfx 96 97 #endif // UI_GFX_GEOMETRY_VECTOR2D_H_ 98
