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.
5 #ifndef UI_GFX_GEOMETRY_POINT_BASE_H_
6 #define UI_GFX_GEOMETRY_POINT_BASE_H_
10 #include "base/compiler_specific.h"
11 #include "build/build_config.h"
12 #include "ui/gfx/gfx_export.h"
16 // A point has an x and y coordinate.
17 template<typename Class
, typename Type
, typename VectorClass
>
18 class GFX_EXPORT PointBase
{
20 Type
x() const { return x_
; }
21 Type
y() const { return y_
; }
23 void SetPoint(Type x
, Type y
) {
28 void set_x(Type x
) { x_
= x
; }
29 void set_y(Type y
) { y_
= y
; }
31 void Offset(Type delta_x
, Type delta_y
) {
36 void operator+=(const VectorClass
& vector
) {
41 void operator-=(const VectorClass
& vector
) {
46 void SetToMin(const Class
& other
) {
47 x_
= x_
<= other
.x_
? x_
: other
.x_
;
48 y_
= y_
<= other
.y_
? y_
: other
.y_
;
51 void SetToMax(const Class
& other
) {
52 x_
= x_
>= other
.x_
? x_
: other
.x_
;
53 y_
= y_
>= other
.y_
? y_
: other
.y_
;
56 bool IsOrigin() const {
57 return x_
== 0 && y_
== 0;
60 VectorClass
OffsetFromOrigin() const {
61 return VectorClass(x_
, y_
);
64 // A point is less than another point if its y-value is closer
65 // to the origin. If the y-values are the same, then point with
66 // the x-value closer to the origin is considered less than the
68 // This comparison is required to use Point in sets, or sorted
70 bool operator<(const Class
& rhs
) const {
71 return (y_
== rhs
.y_
) ? (x_
< rhs
.x_
) : (y_
< rhs
.y_
);
75 PointBase(Type x
, Type y
) : x_(x
), y_(y
) {}
76 // Destructor is intentionally made non virtual and protected.
77 // Do not make this public.
87 #endif // UI_GFX_GEOMETRY_POINT_BASE_H_