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 // Copyright (c) 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef UI_GFX_GEOMETRY_POINT_F_H_ #define UI_GFX_GEOMETRY_POINT_F_H_ #include #include #include #include "ui/gfx/geometry/geometry_export.h" #include "ui/gfx/geometry/point.h" #include "ui/gfx/geometry/vector2d_f.h" namespace gfx { // A floating version of gfx::Point. class GEOMETRY_EXPORT PointF { public: constexpr PointF() : x_(0.f), y_(0.f) {} constexpr PointF(float x, float y) : x_(x), y_(y) {} constexpr explicit PointF(const Point& p) : PointF(static_cast(p.x()), static_cast(p.y())) {} constexpr float x() const { return x_; } constexpr float y() const { return y_; } void set_x(float x) { x_ = x; } void set_y(float y) { y_ = y; } void SetPoint(float x, float y) { x_ = x; y_ = y; } void Offset(float delta_x, float delta_y) { x_ += delta_x; y_ += delta_y; } void operator+=(const Vector2dF& vector) { x_ += vector.x(); y_ += vector.y(); } void operator-=(const Vector2dF& vector) { x_ -= vector.x(); y_ -= vector.y(); } void SetToMin(const PointF& other); void SetToMax(const PointF& other); bool IsOrigin() const { return x_ == 0 && y_ == 0; } Vector2dF OffsetFromOrigin() const { return Vector2dF(x_, y_); } // A point is less than another point if its y-value is closer // to the origin. If the y-values are the same, then point with // the x-value closer to the origin is considered less than the // other. // This comparison is required to use PointF in sets, or sorted // vectors. bool operator<(const PointF& rhs) const { return std::tie(y_, x_) < std::tie(rhs.y_, rhs.x_); } void Scale(float scale) { Scale(scale, scale); } void Scale(float x_scale, float y_scale) { SetPoint(x() * x_scale, y() * y_scale); } // Returns a string representation of point. std::string ToString() const; private: float x_; float y_; }; inline bool operator==(const PointF& lhs, const PointF& rhs) { return lhs.x() == rhs.x() && lhs.y() == rhs.y(); } inline bool operator!=(const PointF& lhs, const PointF& rhs) { return !(lhs == rhs); } inline PointF operator+(const PointF& lhs, const Vector2dF& rhs) { PointF result(lhs); result += rhs; return result; } inline PointF operator-(const PointF& lhs, const Vector2dF& rhs) { PointF result(lhs); result -= rhs; return result; } inline Vector2dF operator-(const PointF& lhs, const PointF& rhs) { return Vector2dF(lhs.x() - rhs.x(), lhs.y() - rhs.y()); } inline PointF PointAtOffsetFromOrigin(const Vector2dF& offset_from_origin) { return PointF(offset_from_origin.x(), offset_from_origin.y()); } GEOMETRY_EXPORT PointF ScalePoint(const PointF& p, float x_scale, float y_scale); inline PointF ScalePoint(const PointF& p, float scale) { return ScalePoint(p, scale, scale); } // This is declared here for use in gtest-based unit tests but is defined in // the //ui/gfx:test_support target. Depend on that to use this in your unit // test. This should not be used in production code - call ToString() instead. void PrintTo(const PointF& point, ::std::ostream* os); } // namespace gfx #endif // UI_GFX_GEOMETRY_POINT_F_H_