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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 <iosfwd>
- #include <string>
- #include <tuple>
- #include "build/build_config.h"
- #include "ui/gfx/geometry/geometry_export.h"
- #include "ui/gfx/geometry/point.h"
- #include "ui/gfx/geometry/vector2d_f.h"
- #if BUILDFLAG(IS_APPLE)
- struct CGPoint;
- #endif
- 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<float>(p.x()), static_cast<float>(p.y())) {}
- #if BUILDFLAG(IS_APPLE)
- explicit PointF(const CGPoint&);
- CGPoint ToCGPoint() const;
- #endif
- 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;
- }
- constexpr void operator+=(const Vector2dF& vector) {
- x_ += vector.x();
- y_ += vector.y();
- }
- constexpr 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; }
- constexpr 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);
- }
- void Transpose() {
- using std::swap;
- swap(x_, y_);
- }
- // Uses the Pythagorean theorem to determine the straight line distance
- // between the two points, and returns true if it is less than
- // |allowed_distance|.
- bool IsWithinDistance(const PointF& rhs, const float allowed_distance) const;
- // Returns a string representation of point.
- std::string ToString() const;
- private:
- float x_;
- float y_;
- };
- constexpr bool operator==(const PointF& lhs, const PointF& rhs) {
- return lhs.x() == rhs.x() && lhs.y() == rhs.y();
- }
- constexpr bool operator!=(const PointF& lhs, const PointF& rhs) {
- return !(lhs == rhs);
- }
- constexpr PointF operator+(const PointF& lhs, const Vector2dF& rhs) {
- PointF result(lhs);
- result += rhs;
- return result;
- }
- constexpr 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);
- }
- inline PointF TransposePoint(const PointF& p) {
- return PointF(p.y(), p.x());
- }
- // 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_
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