Size Class Reference

#include <Pt/Gfx/Size.h>

Floating-point width and height. More...

Public Member Functions
Float	area () const
	Returns the area (width * height).
void	transpose ()
	Swaps width and height in place.
Size	toTransposed () const
	Returns a copy with width and height swapped.
	Size (const SizeI &s)
	Constructs from a SizeI by widening the dimensions.
Size &	operator= (const SizeI &s)
	Assigns from a SizeI by widening the dimensions.
SizeI	round () const
	Rounds each dimension to the nearest integer and returns a SizeI.
SizeI	floor () const
	Floors each dimension and returns a SizeI.
SizeI	ceil () const
	Ceils each dimension and returns a SizeI.

Detailed Description

Size is the logical width and height drawing uses. It is not a pixel count. Image and view dimensions are integers; convert with round(), floor(), or ceil() when a pixel size is required. SizeF is a typedef of this type.

The value is copyable. isEmpty() is true when width or height is zero. area() is width times height. transpose() swaps the components. Arithmetic scales or grows both dimensions.

Construct from two floats, or widen a SizeI with the explicit constructor.

The example builds a logical size and converts it to an integer pixel size by rounding.

Pt::Gfx::Size s(320.0, 240.0);
Pt::Gfx::SizeI pixels = s.round();