CRect::IsRectEmpty

Статья
10/16/2008

Determines whether CRect is empty.

BOOL IsRectEmpty( ) const throw( );

Возвращаемое значение

Nonzero if CRect is empty; 0 if CRect is not empty.

Заметки

A rectangle is empty if the width and/or height are 0 or negative. Differs from IsRectNull, which determines whether all coordinates of the rectangle are zero.

Примечание.
The rectangle must be normalized or this function may fail. You can call NormalizeRect to normalize the rectangle before calling this function.

Пример

CRect rectNone(0, 0, 0, 0);
CRect rectSome(35, 50, 135, 150);

ASSERT(rectNone.IsRectEmpty());
ASSERT(!rectSome.IsRectEmpty());

CRect rectEmpty(35, 35, 35, 35);
ASSERT(rectEmpty.IsRectEmpty());