OLD | NEW |
| (Empty) |
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 #ifndef UI_GFX_POINT_BASE_H_ | |
6 #define UI_GFX_POINT_BASE_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/compiler_specific.h" | |
11 #include "build/build_config.h" | |
12 #include "ui/gfx/gfx_export.h" | |
13 | |
14 namespace gfx { | |
15 | |
16 // A point has an x and y coordinate. | |
17 template<typename Class, typename Type, typename VectorClass> | |
18 class GFX_EXPORT PointBase { | |
19 public: | |
20 Type x() const { return x_; } | |
21 Type y() const { return y_; } | |
22 | |
23 void SetPoint(Type x, Type y) { | |
24 x_ = x; | |
25 y_ = y; | |
26 } | |
27 | |
28 void set_x(Type x) { x_ = x; } | |
29 void set_y(Type y) { y_ = y; } | |
30 | |
31 void Offset(Type delta_x, Type delta_y) { | |
32 x_ += delta_x; | |
33 y_ += delta_y; | |
34 } | |
35 | |
36 void operator+=(const VectorClass& vector) { | |
37 x_ += vector.x(); | |
38 y_ += vector.y(); | |
39 } | |
40 | |
41 void operator-=(const VectorClass& vector) { | |
42 x_ -= vector.x(); | |
43 y_ -= vector.y(); | |
44 } | |
45 | |
46 void SetToMin(const Class& other) { | |
47 x_ = x_ <= other.x_ ? x_ : other.x_; | |
48 y_ = y_ <= other.y_ ? y_ : other.y_; | |
49 } | |
50 | |
51 void SetToMax(const Class& other) { | |
52 x_ = x_ >= other.x_ ? x_ : other.x_; | |
53 y_ = y_ >= other.y_ ? y_ : other.y_; | |
54 } | |
55 | |
56 bool IsOrigin() const { | |
57 return x_ == 0 && y_ == 0; | |
58 } | |
59 | |
60 VectorClass OffsetFromOrigin() const { | |
61 return VectorClass(x_, y_); | |
62 } | |
63 | |
64 // A point is less than another point if its y-value is closer | |
65 // to the origin. If the y-values are the same, then point with | |
66 // the x-value closer to the origin is considered less than the | |
67 // other. | |
68 // This comparison is required to use Point in sets, or sorted | |
69 // vectors. | |
70 bool operator<(const Class& rhs) const { | |
71 return (y_ == rhs.y_) ? (x_ < rhs.x_) : (y_ < rhs.y_); | |
72 } | |
73 | |
74 protected: | |
75 PointBase(Type x, Type y) : x_(x), y_(y) {} | |
76 // Destructor is intentionally made non virtual and protected. | |
77 // Do not make this public. | |
78 ~PointBase() {} | |
79 | |
80 private: | |
81 Type x_; | |
82 Type y_; | |
83 }; | |
84 | |
85 } // namespace gfx | |
86 | |
87 #endif // UI_GFX_POINT_BASE_H_ | |
OLD | NEW |