ui/gfx/point_f.h

   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_F_H_
   6 #define UI_GFX_POINT_F_H_
   7
   8 #include <string>
   9
  10 #include "ui/base/ui_export.h"
  11 #include "ui/gfx/point_base.h"
  12 #include "ui/gfx/vector2d_f.h"
  13
  14 namespace gfx {
  15
  16 // A floating version of gfx::Point.
  17 class UI_EXPORT PointF : public PointBase<PointF, float, Vector2dF> {
  18  public:
  19   PointF() : PointBase<PointF, float, Vector2dF>(0, 0) {}
  20   PointF(float x, float y) : PointBase<PointF, float, Vector2dF>(x, y) {}
  21   ~PointF() {}
  22
  23   void Scale(float scale) {
  24     Scale(scale, scale);
  25   }
  26
  27   void Scale(float x_scale, float y_scale) {
  28     SetPoint(x() * x_scale, y() * y_scale);
  29   }
  30
  31   // Returns a string representation of point.
  32   std::string ToString() const;
  33 };
  34
  35 inline bool operator==(const PointF& lhs, const PointF& rhs) {
  36   return lhs.x() == rhs.x() && lhs.y() == rhs.y();
  37 }
  38
  39 inline bool operator!=(const PointF& lhs, const PointF& rhs) {
  40   return !(lhs == rhs);
  41 }
  42
  43 inline PointF operator+(const PointF& lhs, const Vector2dF& rhs) {
  44   PointF result(lhs);
  45   result += rhs;
  46   return result;
  47 }
  48
  49 inline PointF operator-(const PointF& lhs, const Vector2dF& rhs) {
  50   PointF result(lhs);
  51   result -= rhs;
  52   return result;
  53 }
  54
  55 inline Vector2dF operator-(const PointF& lhs, const PointF& rhs) {
  56   return Vector2dF(lhs.x() - rhs.x(), lhs.y() - rhs.y());
  57 }
  58
  59 inline PointF PointAtOffsetFromOrigin(const Vector2dF& offset_from_origin) {
  60   return PointF(offset_from_origin.x(), offset_from_origin.y());
  61 }
  62
  63 UI_EXPORT PointF ScalePoint(const PointF& p, float x_scale, float y_scale);
  64
  65 inline PointF ScalePoint(const PointF& p, float scale) {
  66   return ScalePoint(p, scale, scale);
  67 }
  68
  69 #if !defined(COMPILER_MSVC)
  70 extern template class PointBase<PointF, float, Vector2dF>;
  71 #endif
  72
  73 }  // namespace gfx
  74
  75 #endif  // UI_GFX_POINT_F_H_