[转]CPoint+CSize+CRect学习大纲

CPoint+CSize+CRect学习大纲。

熟知CPoint、CSize、CRect类的基类

class CPoint : public tagPOINT

class CSize : public tagSIZE

class CRect : public tagRECT

留意CPoint、CSize、CRect之间的互操作，什么样的操作会涉及这些类型中的两个或多个。

Point - Point => Size

Point - Size  => Point

Point - Rect  => Rect

Point + Point => Point

Point + Size  => Point

Point + Rect  => Rect

Size  - Point => Point

Size  - Size  => Size

Size  - Rect  => Rect

Size  + Point => Point

Size  + Size  => Size

Size  + Rect  => Rect

Rect  - Point => Rect

Rect  - Size  => Rect

Rect  - Rect  => Rect

Rect  + Point => Rect

Rect  + Size  => Rect

Rect  + Rect  => Rect

掌握CPoint类以下成员

// 数据

x

y

// 构造

CPoint

// 运算

Offset

operator –

operator +

operator +=

operator –=

// 比较

operator !=

operator ==

掌握CSize类以下成员

// 数据

cx

cy

// 构造

CSize

// 运算

operator –

operator +

operator +=

operator –=

// 比较

operator !=

operator ==

掌握CRect类以下成员

// 数据

left

top

right

bottom

// 构造

CRect

SetRect

CopyRect

// 属性

TopLeft

BottomRight

Width

Height

Size

CenterPoint

// 存在性

IsRectEmpty

SetRectEmpty

IsRectNull

// 比较

PtInRect

EqualRect

// 修改

MoveToX

MoveToY

MoveToXY

OffsetRect

InflateRect

DeflateRect

NormalizeRect

SubtractRect

IntersectRect

UnionRect

// 运算符

operator LPCRECT

operator LPRECT

operator =

operator !=

operator ==

operator –

operator +

operator &

operator |

operator +=

operator –=

operator &=

operator |=

掌握CPoint、CSize、CRect之间的互操作，什么样的操作会涉及这些类型中的两个或多个。

Point - Point => Size

Point - Size  => Point

Point - Rect  => Rect

Point + Point => Point

Point + Size  => Point

Point + Rect  => Rect

Size  - Point => Point

Size  - Size  => Size

Size  - Rect  => Rect

Size  + Point => Point

Size  + Size  => Size

Size  + Rect  => Rect

Rect  - Point => Rect

Rect  - Size  => Rect

Rect  - Rect  => Rect

Rect  + Point => Rect

Rect  + Size  => Rect

Rect  + Rect  => Rect

* 加法满足交换律

* 运算不可以移项

* 与Rect有交的运算都产生Rect