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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_SIZE_BASE_H_
#define UI_GFX_SIZE_BASE_H_
#include <string>
#include "build/build_config.h"
#include "ui/base/ui_export.h"
namespace gfx {
// A size has width and height values.
template<typename Class, typename Type>
class UI_EXPORT SizeBase {
public:
Type width() const { return width_; }
Type height() const { return height_; }
Type GetArea() const { return width_ * height_; }
void SetSize(Type width, Type height) {
set_width(width);
set_height(height);
}
void Enlarge(Type width, Type height) {
set_width(width_ + width);
set_height(height_ + height);
}
Class Scale(float scale) const {
return Scale(scale, scale);
}
Class Scale(float x_scale, float y_scale) const {
return Class(static_cast<Type>(width_ * x_scale),
static_cast<Type>(height_ * y_scale));
}
void set_width(Type width);
void set_height(Type height);
bool operator==(const Class& s) const {
return width_ == s.width_ && height_ == s.height_;
}
bool operator!=(const Class& s) const {
return !(*this == s);
}
bool IsEmpty() const {
// Size doesn't allow negative dimensions, so testing for 0 is enough.
return (width_ == 0) || (height_ == 0);
}
protected:
SizeBase(Type width, Type height);
// Destructor is intentionally made non virtual and protected.
// Do not make this public.
~SizeBase();
private:
Type width_;
Type height_;
};
} // namespace gfx
#endif // UI_GFX_SIZE_BASE_H_
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