This class provides screen functionalities. More...

#include <Screen.h>

Static Public Member Functions
static int	primaryDisplayWidth ()
	Returns the width of the primary display in pixel.

static int	primaryDisplayHeight ()
	Returns the height of the primary display in pixel.

static int	virtualDisplayWidth ()
	Returns the width of the virtual display in pixel.

static int	virtualDisplayHeight ()
	Returns the height of the virtual display in pixel.

static CV::PixelBoundingBoxI	virtualDisplayBoundingBox ()
	Returns the bounding box of the virtual display with pixel resolution.

static CV::PixelPositionI	suitableWindowPosition (const unsigned int windowWidth, const unsigned int windowHeight, const int left=NumericT< int >::minValue(), const int top=NumericT< int >::minValue(), const HWND parent=nullptr)
	Returns the most suitable top left position of a window that has to be placed on the (virtual) screen.

static unsigned int	screens ()
	Returns the number of installed screens.

static bool	screen (const unsigned int positionX, const unsigned int positionY, unsigned int &left, unsigned int &top, unsigned int &width, unsigned int &height)
	Returns the position and dimension of the screen most suitable for a given cursor point.

static bool	screen (const HWND window, unsigned int &left, unsigned int &top, unsigned int &width, unsigned int &height)
	Returns the position and dimension of the screen most suitable for a given window handle.

static int	dpi (const HDC dc)
	Returns the current DPI value of a given device context.

static double	scaleFactor (const HDC dc)
	Returns the scaling factor transforming the number of (backing) pixels defined in the (virtual) display coordinate system to the number of pixels defined in the (native/physical) screen coordinate system for a specified device context.

static int	scalePixel (const int pixel, const HDC dc)
	Converts a given pixel value defined in the (virtual) display coordinate system to the pixel value defined in the (native/physical) screen coordinate system.

static int	scalePixelByFactor (const int pixel, const double scaleFactor)
	Converts a given pixel value by a given scale factor.

Detailed Description

This class provides screen functionalities.

Member Function Documentation

◆ dpi()

static int Ocean::Platform::Win::Screen::dpi ( const HDC dc )

static

Returns the current DPI value of a given device context.

If no context is given, the desktop DC is used instead. A DPI value of 96 complies with a 100 percent scaling, 192 DPI complies with 200 percent scaling

Parameters

dc	The device context, nullptr to determine the scale factor of the default screen

Returns: The resulting DPI value, with range (0, infinity)

◆ primaryDisplayHeight()

static int Ocean::Platform::Win::Screen::primaryDisplayHeight ( )

static

Returns the height of the primary display in pixel.

Returns: Primary display height in pixel

◆ primaryDisplayWidth()

static int Ocean::Platform::Win::Screen::primaryDisplayWidth ( )

static

Returns the width of the primary display in pixel.

Returns: Primary display width in pixel

◆ scaleFactor()

static double Ocean::Platform::Win::Screen::scaleFactor ( const HDC dc )

static

Returns the scaling factor transforming the number of (backing) pixels defined in the (virtual) display coordinate system to the number of pixels defined in the (native/physical) screen coordinate system for a specified device context.

Parameters

dc	The device context, nullptr to determine the scale factor of the default screen

Returns: The resulting scale factor with range (0, infinity)

◆ scalePixel()

int Ocean::Platform::Win::Screen::scalePixel	(	const int	pixel,
		const HDC	dc
	)

inlinestatic

Converts a given pixel value defined in the (virtual) display coordinate system to the pixel value defined in the (native/physical) screen coordinate system.

Parameters

pixel	Pixel value to convert, with range (-infinity, infinity)
dc	The device context, nullptr to determine the scale factor of the default screen

Returns: The converted pixel value for the (native/pyhsical) screen coordinate system, with range (-infinity, infinity)

◆ scalePixelByFactor()

int Ocean::Platform::Win::Screen::scalePixelByFactor	(	const int	pixel,
		const double	scaleFactor
	)

inlinestatic

Converts a given pixel value by a given scale factor.

Parameters

pixel	Pixel value to convert, with range (-infinity, infinity)
scaleFactor	The scale factor to be applied, with range (-infinity, infinity)

Returns: The resulting converted pixel value (-infinity, infinity)

◆ screen() [1/2]

static bool Ocean::Platform::Win::Screen::screen	(	const HWND	window,
		unsigned int &	left,
		unsigned int &	top,
		unsigned int &	width,
		unsigned int &	height
	)

static

Returns the position and dimension of the screen most suitable for a given window handle.

Parameters

window	Window handle to receive the screen for
left	Left screen position, pixel in virtual coordinate space
top	Top screen position, pixel in virtual coordinate space
width	Screen width, in pixel
height	Screen height, in pixel

Returns: True, if succeeded

◆ screen() [2/2]

static bool Ocean::Platform::Win::Screen::screen	(	const unsigned int	positionX,
		const unsigned int	positionY,
		unsigned int &	left,
		unsigned int &	top,
		unsigned int &	width,
		unsigned int &	height
	)

static

Returns the position and dimension of the screen most suitable for a given cursor point.

Parameters

positionX	Horizontal cursor position to receive the screen for
positionY	Vertical cursor position to receive the screen for
left	Left screen position, pixel in virtual coordinate space
top	Top screen position, pixel in virtual coordinate space
width	Screen width, in pixel
height	Screen height, in pixel

Returns: True, if succeeded

◆ screens()

static unsigned int Ocean::Platform::Win::Screen::screens ( )

static

Returns the number of installed screens.

Returns: Screen number

◆ suitableWindowPosition()

static CV::PixelPositionI Ocean::Platform::Win::Screen::suitableWindowPosition	(	const unsigned int	windowWidth,
		const unsigned int	windowHeight,
		const int	left = `NumericT< int >::minValue()`,
		const int	top = `NumericT< int >::minValue()`,
		const HWND	parent = `nullptr`
	)

static

Returns the most suitable top left position of a window that has to be placed on the (virtual) screen.

The final position ensures that the window lies inside the bounding box of the (virtual) screen.

Parameters

windowWidth	The width of the window for which the position will be determined in pixel, with range (0, infinity)
windowHeight	The height of the window for which the pose will be determined in pixel, with range (0, infinity)
left	Optional proposed left position of the window, which will be adjusted to fit into the virtual screen
top	Optional proposed top position of the window, which will be adjusted to fit into the virtual screen
parent	Optional handle of a parent (or associated) window to which the resulting position should match if no proposed position is provided

Returns: The resulting top left position of the window

◆ virtualDisplayBoundingBox()

static CV::PixelBoundingBoxI Ocean::Platform::Win::Screen::virtualDisplayBoundingBox ( )

static

Returns the bounding box of the virtual display with pixel resolution.

Returns: The bounding box of the virtual display

◆ virtualDisplayHeight()

static int Ocean::Platform::Win::Screen::virtualDisplayHeight ( )

static

Returns the height of the virtual display in pixel.

The virtual display is bounded by all screens.

Returns: Virtual display height in pixel

◆ virtualDisplayWidth()

static int Ocean::Platform::Win::Screen::virtualDisplayWidth ( )

static

Returns the width of the virtual display in pixel.

The virtual display is bounded by all screens.

Returns: Virtual display width in pixel

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

win/Screen.h

Static Public Member Functions

Detailed Description

Member Function Documentation

◆ dpi()

◆ primaryDisplayHeight()

◆ primaryDisplayWidth()

◆ scaleFactor()

◆ scalePixel()

◆ scalePixelByFactor()

◆ screen() [1/2]

◆ screen() [2/2]

◆ screens()

◆ suitableWindowPosition()

◆ virtualDisplayBoundingBox()

◆ virtualDisplayHeight()

◆ virtualDisplayWidth()