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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // Defines a simple integer vector class. This class is used to indicate a | 5 // TODO(beng): remove once callsites are patched. |
6 // distance in two dimensions between two points. Subtracting two points should | 6 #include "ui/gfx/geometry/vector2d.h" |
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 | 7 |
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: | |
23 Vector2d() : x_(0), y_(0) {} | |
24 Vector2d(int x, int y) : x_(x), y_(y) {} | |
25 | |
26 int x() const { return x_; } | |
27 void set_x(int x) { x_ = x; } | |
28 | |
29 int y() const { return 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 | |
43 void SetToMin(const Vector2d& other) { | |
44 x_ = x_ <= other.x_ ? x_ : other.x_; | |
45 y_ = y_ <= other.y_ ? y_ : other.y_; | |
46 } | |
47 | |
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 | |
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_ | |
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