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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_POINT_BASE_H_
#define UI_GFX_POINT_BASE_H_
#include <string>
#include "base/compiler_specific.h"
#include "build/build_config.h"
#include "ui/base/ui_export.h"
namespace gfx {
// A point has an x and y coordinate.
template<typename Class, typename Type, typename VectorClass>
class UI_EXPORT PointBase {
public:
Type x() const { return x_; }
Type y() const { return y_; }
void SetPoint(Type x, Type y) {
x_ = x;
y_ = y;
}
void set_x(Type x) { x_ = x; }
void set_y(Type y) { y_ = y; }
void Offset(Type delta_x, Type delta_y) {
x_ += delta_x;
y_ += delta_y;
}
void operator+=(const VectorClass& vector) {
x_ += vector.x();
y_ += vector.y();
}
void operator-=(const VectorClass& vector) {
x_ -= vector.x();
y_ -= vector.y();
}
bool IsOrigin() const {
return x_ == 0 && y_ == 0;
}
VectorClass OffsetFromOrigin() const {
return VectorClass(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 Point in sets, or sorted
// vectors.
bool operator<(const Class& rhs) const {
return (y_ == rhs.y_) ? (x_ < rhs.x_) : (y_ < rhs.y_);
}
protected:
PointBase(Type x, Type y) : x_(x), y_(y) {}
// Destructor is intentionally made non virtual and protected.
// Do not make this public.
~PointBase() {}
private:
Type x_;
Type y_;
};
} // namespace gfx
#endif // UI_GFX_POINT_BASE_H_
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