pointing::DisplayDevice Class Reference

DisplayDevice class is used to represent the displays connected to the computer. More...

#include <DisplayDevice.h>

Inheritance diagram for pointing::DisplayDevice:

Classes
struct	Bounds
	Display bounds (origin and size) in pixels. More...
struct	Point
	A structure to maintain coordinates of a pixel. More...
struct	Size
	Display size in mms. More...

Public Member Functions
virtual Bounds	getBounds (Bounds *defval=0)=0
virtual Size	getSize (Size *defval=0)=0
virtual double	getResolution (double *hppi, double *vppi, double *defval=0)
	Computes the pixel density (resolution) of the display device. More...
double	getResolution (double *defval=0)
virtual double	getRefreshRate (double *defval=0)=0
virtual URI	getURI (bool expanded=false) const =0
virtual void	setDebugLevel (int)
	Sets the level of information for debugging purposes (default = 0).
virtual void	debug (std::ostream &) const

Static Public Member Functions
static DisplayDevice *	create (const char *device_uri=0)
	Static create method is used to instantiate an object of the class.
static DisplayDevice *	create (std::string device_uri)

Detailed Description

DisplayDevice class is used to represent the displays connected to the computer.

It is an abstract class which creates an instance of its platform-specific subclass.

Member Function Documentation

virtual Bounds pointing::DisplayDevice::getBounds ( Bounds *  defval = 0 )

pure virtual

Returns

Bounds of the device expressed in pixels.

Implemented in pointing::DummyDisplayDevice, pointing::osxDisplayDevice, pointing::xorgDisplayDevice, and pointing::winDisplayDevice.

virtual double pointing::DisplayDevice::getRefreshRate ( double *  defval = 0 )

pure virtual

Returns

The refresh rate of the device in Hz.

Implemented in pointing::DummyDisplayDevice, pointing::osxDisplayDevice, pointing::xorgDisplayDevice, and pointing::winDisplayDevice.

double pointing::DisplayDevice::getResolution ( double *  hppi, double *  vppi, double *  defval = 0  )

virtual

Computes the pixel density (resolution) of the display device.

It is computed by calculating the diagonal size of the display in pixels and inches and then calculating PPI (Pixels per inch).

Parameters

hppi	Horizontal resolution (OUT)
vppi	Vertical resolution (OUT)
defval	Default value

Returns

PPI resolution

Reimplemented in pointing::DummyDisplayDevice.

virtual Size pointing::DisplayDevice::getSize ( Size *  defval = 0 )

pure virtual

Returns

The size of the device (width and height) in mm.

Implemented in pointing::DummyDisplayDevice, pointing::osxDisplayDevice, pointing::xorgDisplayDevice, and pointing::winDisplayDevice.

virtual URI pointing::DisplayDevice::getURI ( bool  expanded = false ) const

pure virtual

Returns

The corresponding URI of the device.

Parameters

expanded

specifies if additional parameters must be displayed

Implemented in pointing::DummyDisplayDevice, pointing::osxDisplayDevice, pointing::xorgDisplayDevice, and pointing::winDisplayDevice.

---

The documentation for this class was generated from the following files:

• DisplayDevice.h
• DisplayDevice.cpp