Display class. More...

#include <ilviews/ilv.h>

Public Member Functions
	IlvDisplay (const char className, const char displayName=0, int argc=0, char **argv=0, IlvDisplayConfigCallback dcc=0, IlAny dccArg=0)
	Constructor. More...

	IlvDisplay (IlAny internal, const char *className=0, IlvDisplayConfigCallback dcc=0, IlAny dccArg=0)
	Constructor. More...

virtual	~IlvDisplay ()
	Destructor. More...

void	addChangeLanguageCallback (IlvDisplayCallback cb, IlAny arg)
	Adds a user language change callback. More...

void	addChangeLookCallback (IlvDisplayCallback cb, IlAny arg)
	Adds a user look change callback. More...

void	appendToPath (const char *pathPart)
	Appends a directory to the display's search path. More...

void	bell (int volume=0) const
	Rings the system bell. More...

IlUShort	colorTable (IlvIntensity r, IlvIntensity g, IlvIntensity b, unsigned char indexes, IlBoolean getMutables=IlFalse) const
	Provides a color table. More...

IlvColor *	defaultBackground () const
	Gets the default background color. More...

IlvFont *	defaultBoldFont () const
	Gets the default bold font. More...

IlvCursor *	defaultCursor () const
	Gets the default cursor. More...

IlvFont *	defaultFont () const
	Gets the default font. More...

IlvColor *	defaultForeground () const
	Gets the default foreground color. More...

IlvFont *	defaultItalicFont () const
	Gets the default italic font. More...

IlvFont *	defaultLargeFont () const
	Gets the default large font. More...

IlvLineStyle *	defaultLineStyle () const
	Gets the default line style. More...

IlvFont *	defaultNormalFont () const
	Gets the default normal font. More...

IlvPalette *	defaultPalette () const
	Gets the default palette. More...

IlvPattern *	defaultPattern () const
	Gets the default pattern. More...

void	endDump ()
	Ends output to a dump device. More...

const char *	findInPath (const char *fileName, IlBoolean noLocalization=IlFalse) const
	Finds a file in the display's search path. More...

IlvView *	findPointerView () const
	Finds the view object under the pointer device location. More...

void	flush () const
	Flushes the output buffer. More...

IlvColor *	get8bitsColor (IlUShort r, IlUShort g, IlUShort b, IlBoolean isMutable=IlFalse)
	Gets a color by 8bits RGB values. More...

IlvAntialiasingMode	getAntialiasingMode () const
	Returns the current anti-aliasing mode of the display. More...

IlvBitmap *	getBitmap (const char *name, IlBoolean read=IlFalse) const
	Gets a bitmap. More...

unsigned char *	getBitmapData (const IlvSystemPort *bitmap, IlUInt &size, const IlvRect &rect) const
	Gets bitmap data. More...

const char *	getClassName () const
	Gets the class name specified in the `IlvDisplay` More...

IlvColor *	getColor (const char *name, IlBoolean isMutable=IlFalse)
	Gets a color by name. More...

IlvColor *	getColor (IlvIntensity r, IlvIntensity g, IlvIntensity b, IlBoolean isMutable=IlFalse)
	Gets a color by RGB values. More...

IlvColor *	getColor (IlFloat hue, IlFloat saturation, IlFloat value, IlBoolean isMutable=IlFalse)
	Gets a color by HSV values. More...

IlBoolean	getColorRGB (const char *name, IlvIntensity &r, IlvIntensity &g, IlvIntensity &b) const
	Gets RGB color values. More...

IlSymbol *	getCurrentLanguage () const
	Gets the current language. More...

IlvLookStyle	getCurrentLook () const
	Gets the current look. More...

IlvCursor *	getCursor (const char *name)
	Gets a cursor. More...

IlvMessageDatabase *	getDatabase () const
	Gets the message database. More...

const char *	getEnvOrResource (const char envName, const char resName=0, const char *defaultValue=0) const
	Gets a value from an environment variable or a resource. More...

const char const	getFamilyNames (IlUShort &count) const
	Gets font family names. More...

IlvFont *	getFont (const char *fontName)
	Gets a font. More...

IlvFont *	getFont (const char fontFamily, IlvFontSize fontSize, IlvFontStyle fontStyle=IlvNormalFontStyle, const char foundry=0)
	Gets a font. More...

IlvDim *	getFontSizes (const char fontFamily, IlvFontStyle fontStyle, int &count, const char foundry=0) const
	Gets font sizes. More...

IlvGradientPattern *	getGradientPattern (const char *alias) const
	Gets a gradient pattern. More...

const char *	getHome () const
	Gets the current home setting. More...

IlvPalette *	getInvertedPalette (const IlvPalette *source)
	Gets an inverted palette. More...

IlvGradientPattern *	getLinearGradientPattern (IlvColorStop *colorStops, IlUInt nColorStops, IlvPoint startPoint, IlvPoint endPoint, IlvDim width=0, IlvDim height=0, IlvGradientTransformMode mode=IlvGradientTransformGraphic, IlvGradientAspectRatio aspectRatio=IlvGradientAspectRatioNo, IlvGradientSpread spread=IlvGradientPadSpread, const char alias=0) const
	Gets a linear gradient pattern. More...

IlvGradientPattern *	getLinearGradientPattern (IlvColor startColor, IlvColor endColor, IlvPoint startPoint, IlvPoint endPoint, IlvDim width=0, IlvDim height=0, IlvGradientTransformMode mode=IlvGradientTransformGraphic, IlvGradientAspectRatio aspectRatio=IlvGradientAspectRatioNo, IlvGradientSpread spread=IlvGradientPadSpread, const char *alias=0) const
	Gets a linear gradient pattern. More...

IlvLineStyle *	getLineStyle (IlUShort count, const unsigned char *dashes, IlUShort offset=0)
	Gets a line style. More...

IlvLineStyle *	getLineStyle (const char *name) const
	Gets a line style. More...

IlvLookFeelHandler *	getLookFeelHandler (IlSymbol *) const
	Returns the look and feel handler whose name is specified. More...

IlvLookFeelHandler *	getLookFeelHandler () const
	Gets the current look and feel handler. More...

const char *	getMessage (const char *msgid) const
	Gets a message string from a message identifier. More...

IlvPalette *	getPalette (const char *paletteName)
	Gets a palette. More...

IlvPalette *	getPalette (IlvColor background=0, IlvColor foreground=0, IlvPattern pattern=0, IlvColorPattern colorPattern=0, IlvFont font=0, IlvLineStyle lineStyle=0, IlUShort lineWidth=0, IlvFillStyle fillStyle=IlvFillPattern, IlvArcMode arcMode=IlvArcPie, IlvFillRule fillRule=IlvEvenOddRule, IlvIntensity alpha=IlvFullIntensity, IlvAntialiasingMode antialias=IlvDefaultAntialiasingMode, IlvGradientPattern *gradientPattern=0)
	Gets a palette. More...

const char *	getPath () const
	Gets the display's search path. More...

IlvPattern *	getPattern (const char *name) const
	Gets a pattern. More...

IlvGradientPattern *	getRadialGradientPattern (IlvColorStop *colorStops, IlUInt nColorStops, IlvDim width, IlvDim height, IlvGradientTransformMode mode=IlvGradientTransformGraphic, IlvGradientAspectRatio aspectRatio=IlvGradientAspectRatioNo, IlvGradientSpread spread=IlvGradientPadSpread, const char alias=0) const
	Gets a radial gradient pattern. More...

IlvGradientPattern *	getRadialGradientPattern (IlvColor startColor, IlvColor endColor, IlvDim width, IlvDim height, IlvGradientTransformMode mode=IlvGradientTransformGraphic, IlvGradientAspectRatio aspectRatio=IlvGradientAspectRatioNo, IlvGradientSpread spread=IlvGradientPadSpread, const char *alias=0) const
	Gets a radial gradient pattern. More...

IlvGradientPattern *	getRadialGradientPattern (IlvColorStop *colorStops, IlUInt nColorStops, IlvPoint startCenter, IlvDim startRadius, IlvPoint endCenter, IlvDim endRadius, IlvDim width=0, IlvDim height=0, IlvGradientTransformMode mode=IlvGradientTransformGraphic, IlvGradientAspectRatio aspectRatio=IlvGradientAspectRatioNo, IlvGradientSpread spread=IlvGradientPadSpread, const char alias=0) const
	Gets a radial gradient pattern. More...

IlvGradientPattern *	getRadialGradientPattern (IlvColor startColor, IlvColor endColor, IlvPoint startCenter, IlvDim startRadius, IlvPoint endCenter, IlvDim endRadius, IlvDim width=0, IlvDim height=0, IlvGradientTransformMode mode=IlvGradientTransformGraphic, IlvGradientAspectRatio aspectRatio=IlvGradientAspectRatioNo, IlvGradientSpread spread=IlvGradientPadSpread, const char *alias=0) const
	Gets a radial gradient pattern. More...

const char *	getResource (const char resourceName, const char defaultValue=0) const
	Gets a resource. More...

const char *	getResource (const char resourceName, const char objectName, const char objectClassName, const char storageName=0, const char *storageClassName=0) const
	Gets a resource. More...

IlUShort	getTouchPointCount () const
	Get the current number of touch points, or more. More...

IlUShort	getTouchPoints (const IlvPoint relative, const IlvPoint absolute=0) const
	Get the location of all active touch points. More...

IlvView *	getView (const char *name) const
	Gets a view object. More...

IlvView *	getView (IlvSystemView view) const
	Gets a system view object. More...

IlvView const	getViews (IlUInt &count) const
	Gets view objects. More...

IlBoolean	hasEvents () const
	Notifies you when events occur. More...

IlBoolean	initDump (IlvPort *device)
	Directs output to a dump device. More...

IlBoolean	isBad () const
	Tells you if object creation was unsuccessful. More...

IlBoolean	isCairoEnabled () const
	Indicates whether Cairo features are available. More...

IlBoolean	isDumping () const
	Tells you if dumping is occurring. More...

IlBoolean	isRightButtonValueUsed () const
	Tells you if the right mouse button was used. More...

void	movePointer (IlvDeltaPoint &dp) const
	Moves the cursor to a relative position. More...

void	movePointer (IlvPoint &p) const
	Moves the cursor to a specified point. More...

void	pixelToRGB (IlUInt pixel, IlvIntensity &r, IlvIntensity &g, IlvIntensity &b) const
	Provides the RGB values for a pixel index. More...

void	prependToPath (const char *pathPart)
	Prepends a directory to the display's search path. More...

void	putBitmapData (IlvSystemPort bitmap, const IlvRect &rect, unsigned char data, IlUInt size) const
	Changes bitmap data. More...

void	queryPointer (IlvPos &x, IlvPos &y, IlUShort &modifiers) const
	Finds the cursor. More...

void	readAndDispatchEvents () const
	Reads and dispatches all pending events. More...

IlvBitmap *	readAsciiBitmap (const char *filename)
	Reads an ASCII bitmap. More...

IlvBitmap *	readBitmap (const char *filename)
	Reads a bitmap. More...

IlvBitmapData *	readBitmapData (const char *filename)
	Reads a bitmap data. More...

void	refreshAllViews ()
	Refreshes all views. More...

void	removeChangeLanguageCallback (IlvDisplayCallback cb, IlAny arg)
	Removes a user language change callback. More...

void	removeChangeLookCallback (IlvDisplayCallback cb, IlAny arg)
	Removes a user look change callback. More...

void	restartDump ()
	Restarts output to a dump device. More...

IlvRect &	screenBBox (IlvRect &bbox, IlBoolean workArea=IlTrue, const IlvRect *rect=0) const
	Gets the screen bounding box. More...

IlUShort	screenDepth () const
	Gets the screen depth. More...

IlvDim	screenHeight () const
	Gets the screen height in pixels. More...

IlvDim	screenHeightMM () const
	Gets the screen height in millimeters. More...

IlvSystemPort *	screenPort () const
	Allows you to draw into the dislay system desktop. More...

IlvDim	screenWidth () const
	Gets the screen width in pixels. More...

IlvDim	screenWidthMM () const
	Gets the screen width in millimeters. More...

void	setAntialiasingMode (IlvAntialiasingMode antialias)
	Sets the current anti-aliasing mode of the display. More...

void	setCurrentLanguage (IlSymbol *language)
	Sets the current language. More...

void	setCurrentLook (IlvLookStyle style)
	Sets the current look. More...

void	setLookFeelHandler (IlvLookFeelHandler *lfh)
	Sets the current look and feel handler. More...

void	setPath (const char *path)
	Sets the display's search path. More...

void	stopDump ()
	Temporarily stops output to a dump device. More...

void	sync () const
	Flushes the output buffer and waits for completion. More...

void	synchronize (IlBoolean value=IlTrue) const
	Sets synchronous mode. More...

void	useRightButtonValue (IlBoolean flag)
	Sets a flag for the right mouse button. More...

void	waitAndDispatchEvents () const
	Reads and dispatches the next event. More...

Friends
class	IlvColorPattern

class	IlvLookFeelHandler

class	IlvPalette

class	IlvPattern

Detailed Description

Display class.

Library: display

This class handles every aspect of the connection with the display system.

See Also: IlvBitmap, IlvColor, IlvFont, IlvLineStyle, IlvPalette.

Constructor & Destructor Documentation

IlvDisplay::IlvDisplay	(	const char *	className,
		const char *	displayName = `0`,
		int	argc = `0`,
		char **	argv = `0`,
		IlvDisplayConfigCallback	dcc = `0`,
		IlAny	dccArg = `0`
	)

Constructor.

This constructor is the most often used. It initializes a new instance of the IlvDisplay class that connects you to the window system.

If you specify the dcc parameter (Display Configuration Callback), this function will be called just after the connection of your application to the display system. It allows you to customize your application, and tune low level parameters of some display-dependent aspects.
The className is the application name used to get any associated resource strings from resource files, such as the .XDefault file on UNIX systems.
The displayName parameter identifies the logical screen that the application uses for graphic I/O operations.
The optional parameters argc and argv are usually the parameters of the main C++ function. They are specified at launch time, since certain window systems can parse the arguments to modify the connection with the display server.
The dccArg parameter enables you to specify a user argument of type IlAny which is passed to the IlvDisplayConfigCallback.

Parameters

className	The application name for accessing associated resource files.
displayName	The logical screen name.
argc	Optional parameter of the main C++ function.
argv	Optional parameter of the main C++ function.
dcc	Sets a Display Configuration Callback.
dccArg	A user argument passed to the callback.

IlvDisplay::IlvDisplay	(	IlAny	internal,
		const char *	className = `0`,
		IlvDisplayConfigCallback	dcc = `0`,
		IlAny	dccArg = `0`
	)

Constructor.

Use this constructor to start a Rogue Wave Views session on the basis of an already existing connection to your display system. If you specify the dcc parameter (Display Configuration Callback), then this function will be called just after the connection of your application to the display system. It allows you to customize your application, and tune low level parameters of some display-dependent aspects.
The dccArg parameter enables you to specify a user argument of type IlAny which is passed to the IlvDisplayConfigCallback.
The className is the application name used to get any associated resource strings from resource files, such as the .XDefault file on UNIX systems.

Parameters

className	The application name for accessing associated resource files.
dcc	Sets a Display Configuration Callback.
dccArg	A user argument passed to the callback.

virtual IlvDisplay::~IlvDisplay ( )

virtual

Destructor.

The destructor immediately frees all graphic resources and views that have been used, thus enabling you to terminate an Rogue Wave Views session. If the session was created on the basis of an existing link to a display system, delete does not destroy this link.

Member Function Documentation

void IlvDisplay::addChangeLanguageCallback	(	IlvDisplayCallback	cb,
		IlAny	arg
	)

Adds a user language change callback.

Lets you add user-defined functions, of IlvDisplayCallback type, that are called when the language is dynamically changed. This can be useful because the library will not automatically refresh your views when the language is modified.

Parameters

cb	The callback function.
arg	A user argument passed to the callback.

See Also: IlvDisplay::removeChangeLanguageCallback, IlvDisplay::removeChangeLookCallback.

void IlvDisplay::addChangeLookCallback	(	IlvDisplayCallback	cb,
		IlAny	arg
	)

Adds a user look change callback.

Lets you add user-defined functions, of IlvDisplayCallback type, that are called when the look is dynamically changed. This can be useful because the library will not automatically refresh your views when the look is modified.

Parameters

cb	The callback function.
arg	A user argument passed to the callback.

See Also: IlvDisplay::removeChangeLookCallback, IlvDisplay::removeChangeLanguageCallback.

void IlvDisplay::appendToPath ( const char * pathPart )

Appends a directory to the display's search path.

Extends the user path by appending the directory specified in pathPart.

Parameters

pathPart Contains the path extension to be appended.

void IlvDisplay::bell ( int volume = 0 ) const

Rings the system bell.

Parameters

volume

Specifies the volume of the bell, in a range of 0 to

Very few systems are actually able to use this value, so you might leave this parameter unspecified most of the times.

IlUShort IlvDisplay::colorTable	(	IlvIntensity *	r,
		IlvIntensity *	g,
		IlvIntensity *	b,
		unsigned char *	indexes,
		IlBoolean	getMutables = `IlFalse`
	)		const

Provides a color table.

Provides a color table of the total number of non-mutable (and optionally mutable) colors being used. If getMutables is IlTrue, this member function returns both mutable and non-mutable colors used. You have to provide each of the array parameters. The array size must be 2 to the power <display-depth> (use the screenDepth member function to obtain the display depth).
This member function is only useful if the screen depth is less than or equal to 8.

Parameters

r	The returned array of red component values.
g	The returned array of green component values.
b	The returned array of blue component values.
indexes	The returned of color indices.
getMutables	A Boolean value to specify return of mutable colors as well as non-mutable ones.

Returns: The total number of non-mutable (and optionally mutable) colors being used, and it provides the current mapping indexes.

IlvColor* IlvDisplay::defaultBackground ( ) const

Gets the default background color.

The background color is usually gray. It can easily be set to whatever color you like by means of your display system resource mechanism.
Note that if color is not an important aspect of your application, you can call one of the member functions defaultForeground or defaultBackground that return internally-defined colors.

Returns: The default background color.

IlvFont* IlvDisplay::defaultBoldFont ( ) const

Gets the default bold font.

This font can also be retrieved using getFont("bold").

Returns: A pointer to the default bold font, as defined by the "boldfont" display resource.
On Unix, the default value is built from the font name "%helvetica-12-B".
On Windows, this font corresponds to a bold version of the HFONT that is returned by GetStockObject(DEFAULT_GUI_FONT).

IlvCursor* IlvDisplay::defaultCursor ( ) const

Gets the default cursor.

Returns: A predefined cursor.

IlvFont* IlvDisplay::defaultFont ( ) const

Gets the default font.

Returns: A default font that you can use immediately after the session is launched.

IlvColor* IlvDisplay::defaultForeground ( ) const

Gets the default foreground color.

The foreground color is usually black. It can easily be set to whatever color you like by means of your display system resource mechanism.
Note that if color is not an important aspect of your application, you can call one of the member functions defaultForeground or defaultBackground that return internally-defined colors.

Returns: The default foreground color.

IlvFont* IlvDisplay::defaultItalicFont ( ) const

Gets the default italic font.

This font can also be retrieved using getFont("italic").

Returns: A pointer to the default normal font, as defined by the "italicfont" display resource.
On Unix, the default value is built from the font name "%helvetica-12-I".
On Windows, this font corresponds to an italic version of the HFONT that is returned by GetStockObject(DEFAULT_GUI_FONT).

IlvFont* IlvDisplay::defaultLargeFont ( ) const

Gets the default large font.

This font can also be retrieved using getFont("large").

Returns: A pointer to the default normal font, as defined by the "largefont" display resource.
On Unix, the default value is built from the font name "%helvetica-18-B".
On Windows, this font corresponds to the HFONT that is returned by GetStockObject(DEFAULT_GUI_FONT), six points bigger.

IlvLineStyle* IlvDisplay::defaultLineStyle ( ) const

Gets the default line style.

Lets you access one of the most often used line styles: a solid line, one pixel wide.

Returns: A predefined line style, which is a solid line one pixel wide.

IlvFont* IlvDisplay::defaultNormalFont ( ) const

Gets the default normal font.

This font can also be retrieved using getFont("normal").

Returns: A pointer to the default normal font, as defined by the "normalfont" display resource.
On Unix, the default value is built from the font name "%helvetica-12-".
On Windows, this font corresponds to the HFONT that is returned by GetStockObject(DEFAULT_GUI_FONT).

IlvPalette* IlvDisplay::defaultPalette ( ) const

Gets the default palette.

Returns: A predefined palette. This palette has the default foreground and background, the default font.

IlvPattern* IlvDisplay::defaultPattern ( ) const

Gets the default pattern.

Returns: A predefined pattern, which is the solid pattern.

void IlvDisplay::endDump ( )

Ends output to a dump device.

Terminates any output redirection towards a dump device and closes the device output.

const char* IlvDisplay::findInPath	(	const char *	fileName,
		IlBoolean	noLocalization = `IlFalse`
	)		const

Finds a file in the display's search path.

Parameters

fileName	The name of the file to be located.
noLocalization	Can be set to `IlTrue` in order not to localize the path. When `findInPath` is called, Rogue Wave Views first tries to locate the indicated file in a subdirectory called `"locale/<language_definition>"`, unless this parameter is forced to `IlTrue`.

Returns: The concatenation of fileName with the display path entry where this file is located. If the file could not be located, 0 is returned. Note that this member function returns a temporary string that can be used by other Rogue Wave Views functions. You should copy this string if you want to use the information at a later point in time.

IlvView* IlvDisplay::findPointerView ( ) const

Finds the view object under the pointer device location.

Returns: A pointer to the IlvView object located under the pointer device location, or 0 if there is none.

void IlvDisplay::flush ( ) const

Flushes the output buffer.

Flushes the output buffer (that is, sends all pending requests to the server). On X, it calls XFlush((Display*)_internal);.

IlvColor* IlvDisplay::get8bitsColor	(	IlUShort	r,
		IlUShort	g,
		IlUShort	b,
		IlBoolean	isMutable = `IlFalse`
	)

Gets a color by 8bits RGB values.

Parameters

r	The red component value.
g	The green component value.
b	The blue component value.
isMutable	A Boolean value to specify a mutable color.

Returns: In the r, g, and b parameters, the values of the components of the color called name without allocating it. This member function returns IlTrue if name corresponds to a known r, g, b triplet, and IlFalse otherwise. This member function is called by the getColor member function.

IlvAntialiasingMode IlvDisplay::getAntialiasingMode ( ) const

Returns the current anti-aliasing mode of the display.

Returns: The current anti-aliasing mode of the display.

IlvBitmap* IlvDisplay::getBitmap	(	const char *	name,
		IlBoolean	read = `IlFalse`
	)		const

Gets a bitmap.

The name parameter is the one used in the readBitmap and readAsciiBitmap member functions.

Parameters

name	The name of the object to be retrieved.
read	A Boolean value that specify whether or not the bitmap will be read from the file if it has not been found in the display.

Returns: An IlvBitmap object that has the name name in this display, or 0 if none can be found.

unsigned char* IlvDisplay::getBitmapData	(	const IlvSystemPort *	bitmap,
		IlUInt &	size,
		const IlvRect &	rect
	)		const

Gets bitmap data.

Retrieves the data that defines the image of an IlvBitmap object. The format of the data is the same that was used to create this object. The returned array contains the data that is stored in the bitmap object, in the region given in the rect parameter. The size of the array is returned through the size parameter. This array must be deleted using the function IlFree.

Warning: [note] The X Window documentation warns that if the drawable is a pixmap, the given rectangle (in this rect) must be wholly contained within the pixmap, or a BadMatch error may result.

Parameters

bitmap	The bitmap object.
size	The size of the returned array.
rect	The rectangle of the bitmap.

Returns: The data that defines the image of an IlvBitmap object.

const char* IlvDisplay::getClassName ( ) const

Gets the class name specified in the IlvDisplay

constructor. This member function retrieves the className, the application name used to get any associated resource strings from resource files, such as the .XDefault file on UNIX systems.

Returns: The class name of the IlvDisplay occurrence with name given as the first parameter of the IlvDisplay constructor.

IlvColor* IlvDisplay::getColor	(	const char *	name,
		IlBoolean	isMutable = `IlFalse`
	)

Gets a color by name.

Retrieves the color commonly called name. These color names come from the X Window color-naming scheme. The optional isMutable parameter, which defaults to IlFalse, creates a mutable color when set to IlTrue.

Parameters

name	The name of the color.
isMutable	A Boolean value to specify a mutable color.

Returns: The color with the specified name, or 0 if not possible.

IlvColor* IlvDisplay::getColor	(	IlvIntensity	r,
		IlvIntensity	g,
		IlvIntensity	b,
		IlBoolean	isMutable = `IlFalse`
	)

Gets a color by RGB values.

Provides a color whose RGB components are set to the given r, g and b values.

Parameters

r	The red component value.
g	The green component value.
b	The blue component value.
isMutable	A Boolean value to specify a mutable color.

Returns: The color having the input RGB components, or 0 if not possible.

IlvColor* IlvDisplay::getColor	(	IlFloat	hue,
		IlFloat	saturation,
		IlFloat	value,
		IlBoolean	isMutable = `IlFalse`
	)

Gets a color by HSV values.

Provides a color whose HSV values correspond to the hue, saturation and value parameters.

Parameters

hue	The hue value of this color.
saturation	The saturation value of this color.
value	The luminosity value of this color.
isMutable	A Boolean value to specify a mutable color.

Returns: The color having the input HSV values, or 0 if not possible.

IlBoolean IlvDisplay::getColorRGB	(	const char *	name,
		IlvIntensity &	r,
		IlvIntensity &	g,
		IlvIntensity &	b
	)		const

Gets RGB color values.

Parameters

name	The name of the RGB color.
r	The red component value.
g	The green component value.
b	The blue component value.

Returns: In the r, g, and b parameters, the values of the components of the color called name without allocating it. This member function returns IlTrue if name corresponds to a known r, g, b triplet, and IlFalse otherwise. This member function is called by the getColor member function.

IlSymbol* IlvDisplay::getCurrentLanguage ( ) const

Gets the current language.

Gets the current language associated with the display.

Returns: The current language.

IlvLookStyle IlvDisplay::getCurrentLook ( ) const

Gets the current look.

Retrieves the look identifier used by this display instance. If the display does not use a predefined look and feel, the returned value is IlvOtherLook.

Returns: The current look identifier used by this display instance.

IlvCursor* IlvDisplay::getCursor ( const char * name )

Gets a cursor.

Parameters

name	The name of the cursor to be retrieved.

Returns: The cursor with the specified name.

IlvMessageDatabase* IlvDisplay::getDatabase ( ) const

Gets the message database.

Each instance of the IlvDisplay class creates its own message database. It reads the database description from the file name provided in the environment variable ILVDB, or views.dbm if this variable is not set. This file is searched for in the display path.

Returns: The message database.

const char* IlvDisplay::getEnvOrResource	(	const char *	envName,
		const char *	resName = `0`,
		const char *	defaultValue = `0`
	)		const

Gets a value from an environment variable or a resource.

Retrieves the value either as an environment variable or a resource. The order of priority is first the environment variable and then the resource, when the value is not found.
The returned string must never be deleted or modified. It may be modified by the system and should be copied if you need to keep it.

Parameters

envName	The name of the environment variable to be retrieved.
resName	The name of the resource to be retrieved. A `null` value means that the envName is also used as the resource name.
defaultValue	The default value if no environment variable or any resource is found.

Returns: The resource string if there is one associated with the application name of the current session, or the defaultValue if not.

const char* const* IlvDisplay::getFamilyNames ( IlUShort & count ) const

Gets font family names.

Parameters

count The length of the returned array.

Returns: An array of sorted family font names. This array is overwritten at each call and should never be deleted. The number of available family fonts is stored in the count parameter.

IlvFont* IlvDisplay::getFont ( const char * fontName )

Gets a font.

Retrieves the font object of the given fontName. This behavior is system-dependent. If the name begins with a `%' character, then Rogue Wave Views tries to create a full font object from the value stored in the name string, which must have the form:

    fontName-fontSize-fontFlags

fontName is the family name of the font, such as courier, helvetica or times. fontSize is an integer value that gives the font's size. fontFlags is a series of characters that indicates the font style: B for bold, I for italic and U for underlined. This field can be empty for a normal font.
You may specify the font foundry on systems where conflicts may appear. This parameter is highly system-dependent. The foundry then appears at the end of the Rogue Wave Views font name, after an additional dash.
This function returns 0 if no such a font can be created.

Parameters

fontName The name of the font object, or a string in the format fontName-fontSize-fontFlags that also may provide size and style flags, and a font foundry.

Returns: The font object having the given name, or 0 if not possible.

IlvFont* IlvDisplay::getFont	(	const char *	fontFamily,
		IlvFontSize	fontSize,
		IlvFontStyle	fontStyle = `IlvNormalFontStyle`,
		const char *	foundry = `0`
	)

Gets a font.

Retrieves the font object having the given characteristics. This method lets you specify the font family, the font size, the font style, and optionally the font foundry.

Parameters

fontFamily	The name of the font family.
fontSize	The size of the font.
fontStyle	The style of the font.
foundry	The font foundry.

Returns: The font with the specified characteristics.

IlvDim* IlvDisplay::getFontSizes	(	const char *	fontFamily,
		IlvFontStyle	fontStyle,
		int &	count,
		const char *	foundry = `0`
	)		const

Gets font sizes.

Can be used to know what sizes are available for the font family fontFamily, if given the style fontStyle and optionally foundry. An array of sorted valid sizes is returned. This array is overwritten at each call, and should never be deleted. The length of this array is stored in the count parameter. On systems that have scalable fonts, the first element of this array is 0. That means that you can allocate a font that has these characteristics, and any possible size.

Parameters

fontFamily	The name of the font family.
fontStyle	The style of the font.
count	The length of the return array.
foundry	The font foundry.

Returns: The valid sizes of the font with the specified characteristics.

IlvGradientPattern* IlvDisplay::getGradientPattern ( const char * alias ) const

Gets a gradient pattern.

Parameters

alias The alias of the gradient pattern to be retrieved.

Returns: The gradient pattern with the specified alias, or NULL if there is none.

const char* IlvDisplay::getHome ( ) const

Gets the current home setting.

Returns: A string that represents the current IlvHome setting. You must not modify nor delete the returned string.

IlvPalette* IlvDisplay::getInvertedPalette ( const IlvPalette * source )

Gets an inverted palette.

Parameters

source The palette to be inverted.

Returns: A palette that has the same properties as the source palette, except for the background and foreground that are swapped.

IlvGradientPattern* IlvDisplay::getLinearGradientPattern	(	IlvColorStop **	colorStops,
		IlUInt	nColorStops,
		IlvPoint	startPoint,
		IlvPoint	endPoint,
		IlvDim	width = `0`,
		IlvDim	height = `0`,
		IlvGradientTransformMode	mode = `IlvGradientTransformGraphic`,
		IlvGradientAspectRatio	aspectRatio = `IlvGradientAspectRatioNo`,
		IlvGradientSpread	spread = `IlvGradientPadSpread`,
		const char *	alias = `0`
	)		const

Gets a linear gradient pattern.

Parameters

colorStops	An array of color stops.
nColorStops	The number of color stops.
startPoint	The start point.
endPoint	The end point.
width	The width of the gradient pattern. If no /a width is provided, the value will be internally computed based on the coordinates of the start and end points.
height	The height of the gradient pattern.If no /a height is provided, the value will be internally computed based on the coordinates of the start and end points.
mode	The gradient transform mode.
aspectRatio	The gradient aspect ratio.
spread	The type of spread.
alias	The alias of the gradient pattern.

Returns: A gradient pattern instance matching the input parameters. If the /a alias parameter is not NULL and a gradient pattern instance with the same /a alias already exists on this display, then this instance is returned. Otherwise, a new aliased pattern is instantiated and returned. If less than 2 color stops are defined, this method returns NULL.

IlvGradientPattern* IlvDisplay::getLinearGradientPattern	(	IlvColor *	startColor,
		IlvColor *	endColor,
		IlvPoint	startPoint,
		IlvPoint	endPoint,
		IlvDim	width = `0`,
		IlvDim	height = `0`,
		IlvGradientTransformMode	mode = `IlvGradientTransformGraphic`,
		IlvGradientAspectRatio	aspectRatio = `IlvGradientAspectRatioNo`,
		IlvGradientSpread	spread = `IlvGradientPadSpread`,
		const char *	alias = `0`
	)		const

Gets a linear gradient pattern.

Parameters

startColor	The start color.
endColor	The end color.
startPoint	The start point.
endPoint	The end point.
width	The width of the gradient pattern. If no /a width is provided, the value will be internally computed based on the coordinates of the start and end points.
height	The height of the gradient pattern.If no /a height is provided, the value will be internally computed based on the coordinates of the start and end points.
mode	The gradient transform mode.
aspectRatio	The gradient aspect ratio.
spread	The type of spread.
alias	The alias of the gradient pattern.

Returns: A gradient pattern instance matching the input parameters. If the /a alias parameter is not NULL and a gradient pattern instance with the same /a alias already exists on this display, then this instance is returned. Otherwise, a new aliased pattern is instantiated and returned.

IlvLineStyle* IlvDisplay::getLineStyle	(	IlUShort	count,
		const unsigned char *	dashes,
		IlUShort	offset = `0`
	)

Gets a line style.

This member function retrieves a line style based on the count, dashes, and offset parameters (see IlvLineStyle).

Parameters

count	The length of the line style array.
dashes	The number of foreground-colored pixels in a dash.
offset	The number of pixels to be skipped before the next dash.

Returns: The line style having the specified characteristics.

IlvLineStyle* IlvDisplay::getLineStyle ( const char * name ) const

Gets a line style.

This member function uses the name parameter to return a previously defined line style.

Parameters

name	The name of the line style.

Returns: The line style having the specified name.

IlvLookFeelHandler* IlvDisplay::getLookFeelHandler ( IlSymbol * ) const

Returns the look and feel handler whose name is specified.

If no look and feel handler with name as the name has already been created, a new one is created.

Parameters

name	The name of the look and feel handler.

Returns: The look and feel handler whose name is specified.

IlvLookFeelHandler* IlvDisplay::getLookFeelHandler ( ) const

Gets the current look and feel handler.

Returns: The current look and feel handler used by this display instance.

const char* IlvDisplay::getMessage ( const char * msgid ) const

Gets a message string from a message identifier.

The method firts queries the current language from the locale, then gets the translation of msgid in this language from the IlvDisplay message database.
For instance, in an English Latin1 locale, getMessage("&save") returns the constant string "Save".
In a French Latin1 locale, the same call returns "Enregistrer".

Usually, the first character of a message identifier is '&'. However, this is not mandatory; this convention just helps recognizing message identifiers from simple labels.

Parameters

msgid The identifier of the message to retrieve.

Returns: The message translation. The returned string should not be modified. If the message database does not contain a translation for msgid in the current language, the method returns msgid.

See Also: getDatabase(); IlvMessageDatabase; IlvMessageDatabase::getMessage().

IlvPalette* IlvDisplay::getPalette ( const char * paletteName )

Gets a palette.

Parameters

paletteName The name of the palette to be retrieved.

Returns: The palette having the name paletteName in this display, or NULL if there is none.

IlvPalette* IlvDisplay::getPalette	(	IlvColor *	background = `0`,
		IlvColor *	foreground = `0`,
		IlvPattern *	pattern = `0`,
		IlvColorPattern *	colorPattern = `0`,
		IlvFont *	font = `0`,
		IlvLineStyle *	lineStyle = `0`,
		IlUShort	lineWidth = `0`,
		IlvFillStyle	fillStyle = `IlvFillPattern`,
		IlvArcMode	arcMode = `IlvArcPie`,
		IlvFillRule	fillRule = `IlvEvenOddRule`,
		IlvIntensity	alpha = `IlvFullIntensity`,
		IlvAntialiasingMode	antialias = `IlvDefaultAntialiasingMode`,
		IlvGradientPattern *	gradientPattern = `0`
	)

Gets a palette.

Provides you with a palette. When you intend to use a palette that does not need to be directly modified, you can allocate the palette using that member function. That is, you would never use any of the set member functions (documented later) in the case of such a palette. If you use this technique, you have to be sure to lock and unlock this IlvPalette object when needed, since it is shared among all the objects that are created in this session. If you don't need specific resources, you can set the parameters of this function to 0; then the display's default resources will be used in this palette.

Parameters

background	The background color, or `0` for the default.
foreground	The foreground color, or `0` for the default.
pattern	The pattern, or `0` for the default.
colorPattern	The color pattern, or `0` for the default.
gradientPattern	The gradient pattern, or `0` for the default.
font	The font, or `0` for the default.
lineStyle	The line style, or `0` for the default.
lineWidth	The line width, or `0` for the default.
fillStyle	The fill style, or `0` for the default.
arcMode	the arc mode, or `0` for the default.
fillRule	The fill rule, or `0` for the default.
alpha	The alpha value, or `IlvFullIntensity` for the default.
antialias	The anti-aliasing mode, or `IlvDefaultAntialiasingMode` for the default.

Returns: A palette.

const char* IlvDisplay::getPath ( ) const

Gets the display's search path.

The access to files is greatly simplified by the display path mechanism: if the path name provided in a call to the functions that open and read files is relative, then the function will search for the file name in the directories specified in the display path. The display path is made of the concatenation of three parts: the current directory (known as `.'), the user path, that can be loaded at runtime and changed afterwards, and the system path, which is built upon the home setting.
The setting of the product home is made by using the environment variable ILVHOME or the display resource IlvHome. It defaults to /usr/local/roguewave/views<ver>. The setting of the user path is made by using the environment variable ILVPATH or the display resource IlvPath. It defaults to an empty path.
The following member functions can be used to check and manipulate the display path, as well as to check whether a filename exists in any of the directories specified in the display path:

Returns: A string that defines the entire path used by the display to locate files. This string must not be deleted or modified by the user.

IlvPattern* IlvDisplay::getPattern ( const char * name ) const

Gets a pattern.

Parameters

name	The name of the pattern to be retrieved.

Returns: The pattern with the specified name.

IlvGradientPattern* IlvDisplay::getRadialGradientPattern	(	IlvColorStop **	colorStops,
		IlUInt	nColorStops,
		IlvDim	width,
		IlvDim	height,
		IlvGradientTransformMode	mode = `IlvGradientTransformGraphic`,
		IlvGradientAspectRatio	aspectRatio = `IlvGradientAspectRatioNo`,
		IlvGradientSpread	spread = `IlvGradientPadSpread`,
		const char *	alias = `0`
	)		const

Gets a radial gradient pattern.

The gradient start and end circles will be computed based on the /a width and /a height parameters. The circles will be centered at the coordinate (/a width/2, /a height/2). The start circle will have a radius equal to 1. The end circle will have a radius equal to the smallest value between /a width and /a height divided by 2.

Parameters

colorStops	An array of color stops.
nColorStops	The number of color stops.
width	The width of the gradient pattern.
height	The height of the gradient pattern.
mode	The gradient transform mode.
aspectRatio	The gradient aspect ratio.
spread	The type of spread.
alias	The alias of the gradient pattern.

Returns: A gradient pattern instance matching the input parameters. If the /a alias parameter is not NULL and a gradient pattern instance with the same /a alias already exists on this display, then this instance is returned. Otherwise, a new aliased pattern is instantiated and returned. If less than 2 color stops are defined, this method returns NULL.

IlvGradientPattern* IlvDisplay::getRadialGradientPattern	(	IlvColor *	startColor,
		IlvColor *	endColor,
		IlvDim	width,
		IlvDim	height,
		IlvGradientTransformMode	mode = `IlvGradientTransformGraphic`,
		IlvGradientAspectRatio	aspectRatio = `IlvGradientAspectRatioNo`,
		IlvGradientSpread	spread = `IlvGradientPadSpread`,
		const char *	alias = `0`
	)		const

Gets a radial gradient pattern.

The gradient start and end circles will be computed based on the /a width and /a height parameters. The circles will be centered at the coordinate (/a width/2, /a height/2). The start circle will have a radius equal to 1. The end circle will have a radius equal to the smallest value between /a width and /a height divided by 2.

Parameters

startColor	The start color.
endColor	The end color.
width	The width of the gradient pattern.
height	The height of the gradient pattern.
mode	The gradient transform mode.
aspectRatio	The gradient aspect ratio.
spread	The type of spread.
alias	The alias of the gradient pattern.

Returns: A gradient pattern instance matching the input parameters. If the /a alias parameter is not NULL and a gradient pattern instance with the same /a alias already exists on this display, then this instance is returned. Otherwise, a new aliased pattern is instantiated and returned.

IlvGradientPattern* IlvDisplay::getRadialGradientPattern	(	IlvColorStop **	colorStops,
		IlUInt	nColorStops,
		IlvPoint	startCenter,
		IlvDim	startRadius,
		IlvPoint	endCenter,
		IlvDim	endRadius,
		IlvDim	width = `0`,
		IlvDim	height = `0`,
		IlvGradientTransformMode	mode = `IlvGradientTransformGraphic`,
		IlvGradientAspectRatio	aspectRatio = `IlvGradientAspectRatioNo`,
		IlvGradientSpread	spread = `IlvGradientPadSpread`,
		const char *	alias = `0`
	)		const

Gets a radial gradient pattern.

Parameters

colorStops	An array of color stops.
nColorStops	The number of color stops.
startCenter	The center of the start circle.
startRadius	The radius of the start circle.
endCenter	The center of the end circle.
endRadius	The radius of the end circle.
width	The width of the gradient pattern. If no /a width is provided, the value will be internally computed based on the coordinates of the start and end circles.
height	The height of the gradient pattern.If no /a height is provided, the value will be internally computed based on the coordinates of the start and end circles.
mode	The gradient transform mode.
aspectRatio	The gradient aspect ratio.
spread	The type of spread.
alias	The alias of the gradient pattern.

Returns: A gradient pattern instance matching the input parameters. If the /a alias parameter is not NULL and a gradient pattern instance with the same /a alias already exists on this display, then this instance is returned. Otherwise, a new aliased pattern is instantiated and returned. If less than 2 color stops are defined, this method returns NULL.

IlvGradientPattern* IlvDisplay::getRadialGradientPattern	(	IlvColor *	startColor,
		IlvColor *	endColor,
		IlvPoint	startCenter,
		IlvDim	startRadius,
		IlvPoint	endCenter,
		IlvDim	endRadius,
		IlvDim	width = `0`,
		IlvDim	height = `0`,
		IlvGradientTransformMode	mode = `IlvGradientTransformGraphic`,
		IlvGradientAspectRatio	aspectRatio = `IlvGradientAspectRatioNo`,
		IlvGradientSpread	spread = `IlvGradientPadSpread`,
		const char *	alias = `0`
	)		const

Gets a radial gradient pattern.

Parameters

startColor	The start color.
endColor	The end color.
startCenter	The center of the start circle.
startRadius	The radius of the start circle.
endCenter	The center of the end circle.
endRadius	The radius of the end circle.
width	The width of the gradient pattern. If no /a width is provided, the value will be internally computed based on the coordinates of the start and end circles.
height	The height of the gradient pattern.If no /a height is provided, the value will be internally computed based on the coordinates of the start and end circles.
mode	The gradient transform mode.
aspectRatio	The gradient aspect ratio.
spread	The type of spread.
alias	The alias of the gradient pattern.

Returns: A gradient pattern instance matching the input parameters. If the /a alias parameter is not NULL and a gradient pattern instance with the same /a alias already exists on this display, then this instance is returned. Otherwise, a new aliased pattern is instantiated and returned.

const char* IlvDisplay::getResource	(	const char *	resourceName,
		const char *	defaultValue = `0`
	)		const

Gets a resource.

Retrieves the possible resource string associated with the application name of the current Rogue Wave Views session (specified in the IlvDisplay constructor) and the string resourceName. The way resources are stored within your display system configuration files is obviously system dependent. You must never modify or delete the returned string.
If no resource matches the given string, then this member function returns the default value provided in the defaultValue parameter. The result of a getResource call is reused every time you call the function.
The default resources that are initialized when an instance of the IlvDisplay class is created use the system resources mechanism.
The default foreground color is created from the resource name "foreground".
The default background color is created from the resource name "background".
The default font is created from the resource name "font". To obtain a new font, or the size of an existing font, use the getFont or getFontSizes member functions of IlvDisplay.

Parameters

resourceName	The name of the resource to be retrieved.
defaultValue	A default string to be returned if the get is unsuccessful.

Returns: The resource string if there is one associated with the application name of the current session, or the defaultValue value if not.

const char* IlvDisplay::getResource	(	const char *	resourceName,
		const char *	objectName,
		const char *	objectClassName,
		const char *	storageName = `0`,
		const char *	storageClassName = `0`
	)		const

Gets a resource.

Retrieves the value of the resource that matches the following pattern:

[ApplicationName|"RogueWaveViews"].
     [storageClassName|storageName].
         [objectClassName|objectName]

where: storageClassName is the generic name of the storage instance, for example, IlvContainer. storageName is the name of the storage instance. objectClassName is the generic name of the object class, for example, IlvButton. objectName is the name of the object instance. Both objectName and storageName can be 0.

Parameters

resourceName	The resource name.
objectName	The object name.
objectClassName	The generic name of the object class.
storageName	The generic name of the storage instance.
storageClassName	The generic name of the storage class.

Returns: The value of the resource that matches the pattern.

IlUShort IlvDisplay::getTouchPointCount ( ) const

Get the current number of touch points, or more.

The return value is guaranteed to be equal or greater than the number of touch points currently active on the touch device. It is not a constant of the system and may vary between calls to this method. This value is mostly used to compute the size of arrays passed as parameters to ::getTouchPoints().

Returns: A number superior or equal to the current number of touch points in use.

IlUShort IlvDisplay::getTouchPoints	(	const IlvPoint **	relative,
		const IlvPoint **	absolute = `0`
	)		const

Get the location of all active touch points.

The indexes in this array match the IlUShort value returned by the multitouch events. Active touch point are not necessarily contiguous; the array can contain null pointers when there is no active point for a given index. Usage example:

  IlUShort count = display->getTouchPointsCount();
  const IlvPoint** relative = new const IlvPoint*[count];
  IlUShort validNb = display->getTouchPoints(relative);
  for (IlUShort i = 0, valid = 0; i < count && valid < validNb; ++i) {
      if (relative[i]) {
          // do something with the #i touch point coordinates
          valid++;
      }
  }
  delete[] relative;

Parameters

relative	An array of pointers to `const IlvPoint` that will receive touch points in coordinates relative to the view. The array must have at least the size returned by `::getTouchPointCount()`.
absolute	An array of pointers to `const IlvPoint` that will receive the touch points in absolute coordinates, similar to `IlvEvent::getGLocation()`. The array must have at least the size returned by `::getTouchPointCount()`.

Returns: The number of valid touch points in the array(s). This number can be smaller than the size of the array(s).

IlvView* IlvDisplay::getView ( const char * name ) const

Gets a view object.

Parameters

name	The name of the view object to be retrieved.

Returns: A pointer to the IlvView object that has the name name in this display, or 0 if none could be found.

IlvView* IlvDisplay::getView ( IlvSystemView view ) const

Gets a system view object.

Parameters

view	The name of the queried view.

Returns: a pointer to the IlvView object that has the system view view in this display, or 0 if none could be found.

IlvView* const* IlvDisplay::getViews ( IlUInt & count ) const

Gets view objects.

Parameters

count The number of view objects to be retrieved.

Returns: An array of pointers to the allocated IlvView objects. This array should not be modified or deleted (it actually is a data block managed by IlvPoolOf(Pointer)).

IlBoolean IlvDisplay::hasEvents ( ) const

Notifies you when events occur.

Watches for the possible existence of external events: that is, mouse and keyboard operations.

Returns: IlTrue when an event has occurred.

IlBoolean IlvDisplay::initDump ( IlvPort * device )

Directs output to a dump device.

Initializes the redirection towards a dump device given in dumpDevice that should have been correctly initialized.

Parameters

dumpDevice The dump device.

IlBoolean IlvDisplay::isBad ( ) const

Tells you if object creation was unsuccessful.

Lets you discover whether or not the creation of the IlvDisplay object has succeeded. It returns IlTrue if there has been an error when creating the IlvDisplay, and IlFalse if not.

Returns: IlTrue if there was an error in creating the object, and IlFalse if not.

IlBoolean IlvDisplay::isCairoEnabled ( ) const

Indicates whether Cairo features are available.

Returns: IlTrue if Cairo features are available. isCairoEnabled() always returns IlFalse on Windows.

IlBoolean IlvDisplay::isDumping ( ) const

Tells you if dumping is occurring.

Returns: IlTrue if dumping is taking place or IlFalse if it is not.

IlBoolean IlvDisplay::isRightButtonValueUsed ( ) const

Tells you if the right mouse button was used.

Returns: The current status of the value set in the IlvEvent when the user clicks the right button on a mouse with only two buttons.

void IlvDisplay::movePointer ( IlvDeltaPoint & dp ) const

Moves the cursor to a relative position.

Moves the cursor to another position on the screen. This method moves it to a point whose relative position is indicated by the vector dp.

Parameters

dp	The position to which the cursor is to be moved, relative to the current position.

void IlvDisplay::movePointer ( IlvPoint & p ) const

Moves the cursor to a specified point.

Moves the cursor to another position on the screen. The cursor is moved to a precisely specified point, indicated by the parameter p.

Parameters

p	The point to which the cursor is to be moved.

void IlvDisplay::pixelToRGB	(	IlUInt	pixel,
		IlvIntensity &	r,
		IlvIntensity &	g,
		IlvIntensity &	b
	)		const

Provides the RGB values for a pixel index.

Provides the RGB values that correspond to the pixel index.

Parameters

pixel	The pixel index.
r	The red component value.
g	The green component value.
b	The blue component value.

Returns: The red green blue values.

void IlvDisplay::prependToPath ( const char * pathPart )

Prepends a directory to the display's search path.

Adds at the beginning of the user path the directory specified in pathPart, which becomes the first directory to be scanned when file names are searched for.

Parameters

pathPart Contains the path extension to be prepended.

void IlvDisplay::putBitmapData	(	IlvSystemPort *	bitmap,
		const IlvRect &	rect,
		unsigned char *	data,
		IlUInt	size
	)		const

Changes bitmap data.

Modifies the image data of an IlvBitmap object in the area indicated by rect. You modify the bitmap object by setting its data bytes to the values stored in the data array. This array has a length of size bytes, and the modified region must be given in the rect parameter.
The data has the same format as in the second constructor of IlvBitmap, that is, it must contains 8 bits per pixel data when used in a bitmap, or 32 bits if the bitmap depth is greater than 8.

Parameters

bitmap	The bitmap object to the modified.
rect	The rectangular area to be modified.
data	An array containing the modification values.
size	The length of the data array.

void IlvDisplay::queryPointer	(	IlvPos &	x,
		IlvPos &	y,
		IlUShort &	modifiers
	)		const

Finds the cursor.

Provides you with the global position of the cursor with respect to the root port.

Parameters

x	The x coordinate of the pointer.
y	The y coordinate of the pointer.
modifiers	The mouse modifiers.

void IlvDisplay::readAndDispatchEvents ( ) const

Reads and dispatches all pending events.

Reads all pending events and dispatches them to the views.

IlvBitmap* IlvDisplay::readAsciiBitmap ( const char * filename )

Reads an ASCII bitmap.

Reads a bitmap from the file filename that stores an ASCII format image, returning a pointer to the IlvBitmap object. 0 is returned if filename does not exist or if the file data does not match an ASCII format. This format is the one used by the X Window display system. Two ASCII formats exist: XBM for monochrome images and XPM for color image formats. The returned IlvBitmap object is given the name filename. If filename is a relative path name, the display path is used to locate the actual data file. (See also IlvBitmap::saveAscii.)

Warning: [note] Before calling readAsciiBitmap, you should test whether the bitmap has not already been loaded by calling the getBitmap member function. Otherwise, different object pointers would be returned for the same bitmap.

Parameters

filename The name of the file to be read from.

Returns: A pointer to the IlvBitmap object created by reading from the file filename that stores an ASCII format image, or 0 if not possible.

IlvBitmap* IlvDisplay::readBitmap ( const char * filename )

Reads a bitmap.

Reads a bitmap from the file filename, returning a pointer to the IlvBitmap object. 0 is returned if filename does not exist or if the file data does not match any registered format or if a module for the file data has not been found . The IlvBitmap object is given the name filename. If filename is a relative path name, the display path is used to locate the actual data file. filename can also be an URL as specified in IlIUrlStream.

Registering a format just consists of including the corresponding header and linking with the appropriate library:

ilviews/bitmaps/png.h and ilvpng for PNG images.
ilviews/bitmaps/jpg.h and ilvjpg for JPEG images.
ilviews/bitmaps/bmp.h and ilvbmp for BMP images.
ilviews/bitmaps/ppm.h and ilvppm for PPM images.
ilviews/bitmaps/wbmp.h and ilvwbmp for WBMP images.

The XPM and XBM format are always registered. The file format is automatically recognized from the data. Unknown file format at compile time can also be loaded at runtime if the platform supports dynamic modules and a module exists for this format. In this case, it is not necessary to use the header and library.

The old method of registering the bitmap readers using their file extension is still supported.

Warning: [note] The GIF format is not supported anymore due to patents enforced by Unisys on the LZW compression.; [note] Before calling readBitmap, you should test to see if the bitmap has not already been loaded by calling the getBitmap member function. Otherwise, different object pointers would be returned for the same bitmap.

Parameters

filename The name of the file to be read from.

Returns: A pointer to the IlvBitmap object created by reading from the file filename.

IlvBitmapData* IlvDisplay::readBitmapData ( const char * filename )

Reads a bitmap data.

Reads a bitmap data from the file filename, returning a pointer to the IlvBitmapData object. See IlvDisplay::readBitmap for more information.

This method only works with bitmap streamers (returns 0 for XPM and XBM images).

Parameters

filename The name of the file to be read from.

Returns: A pointer to the IlvBitmapData object created by reading from the file filename.

void IlvDisplay::refreshAllViews ( )

Refreshes all views.

Immediately refreshes all the views allocated by this display. This is useful when you globally change the appearance of your applications (changing the current language or look, for example).

void IlvDisplay::removeChangeLanguageCallback	(	IlvDisplayCallback	cb,
		IlAny	arg
	)

Removes a user language change callback.

Lets you remove a callback previously set using the IlvDisplay::addChangeLanguageCallback method.

Parameters

cb	The callback function.
arg	The user argument passed to the callback.

void IlvDisplay::removeChangeLookCallback	(	IlvDisplayCallback	cb,
		IlAny	arg
	)

Removes a user look change callback.

Lets you remove a callback previously set using the IlvDisplay::addChangeLookCallback method.

Parameters

cb	The callback function.
arg	The user argument passed to the callback.

void IlvDisplay::restartDump ( )

Restarts output to a dump device.

Restarts output redirection.

IlvRect& IlvDisplay::screenBBox	(	IlvRect &	bbox,
		IlBoolean	workArea = `IlTrue`,
		const IlvRect *	rect = `0`
	)		const

Gets the screen bounding box.

Parameters

bbox	The returned bounding box of the screen.
workArea	A Boolean value indicating whether the returned bounding box contains only the working area. This parameter is meaningful only on Microsoft Windows, where the working area is the bounding of the screen without the task bar.
rect	A pointer to a rectangle. This parameter is used in multiple monitor environments. If rect is `0`, the returned bounding box is the union of all of the monitors' bounding boxes. If not, the returned bounding box is the bounding of the monitor that contains the largest part of the rectangle rect.

Returns: The screen bounding box.

IlUShort IlvDisplay::screenDepth ( ) const

Gets the screen depth.

Returns: The depth of the screen.

IlvDim IlvDisplay::screenHeight ( ) const

Gets the screen height in pixels.

Returns: The height of the screen, in pixels.

IlvDim IlvDisplay::screenHeightMM ( ) const

Gets the screen height in millimeters.

Returns: The estimated height, in millimeters, of the screen addressed by this IlvDisplay. Note that the returned value is only an estimation returned by the underlying windowing system (as returned by XDisplayHeight on X11 and GetDeviceCaps(VERTSIZE) on Windows).

IlvSystemPort* IlvDisplay::screenPort ( ) const

Allows you to draw into the dislay system desktop.

Gives you the possibility of drawing into a special IlvPort object: the root window of your display system (also called the "<em>desktop</em>"of your workstation).

IlvDim IlvDisplay::screenWidth ( ) const

Gets the screen width in pixels.

Returns: The width of the screen, in pixels.

IlvDim IlvDisplay::screenWidthMM ( ) const

Gets the screen width in millimeters.

Returns: The estimated width, in millimeters, of the screen addressed by this IlvDisplay. Note that the returned value is only an estimation returned by the underlying windowing system (as returned by XDisplayWidth on X11 and GetDeviceCaps(HORZSIZE) on Windows).

void IlvDisplay::setAntialiasingMode ( IlvAntialiasingMode antialias )

Sets the current anti-aliasing mode of the display.

Parameters

The	new anti-aliasing mode of the display.

void IlvDisplay::setCurrentLanguage ( IlSymbol * language )

Sets the current language.

Sets the current language associated with the display.

Parameters

language The name of the language to be set.

void IlvDisplay::setCurrentLook ( IlvLookStyle style )

Sets the current look.

Sets the look identifier used by this display instance to the IlvLookStyle style. Use this method to set a predefined look and feel to this display instance. To set a user-defined look and feel, use the setLookFeelHandler method.

Parameters

style The look identifier to be set.

See Also: setLookFeelHandler

void IlvDisplay::setLookFeelHandler ( IlvLookFeelHandler * lfh )

Sets the current look and feel handler.

Sets a user-defined look and feel handler to this display instance. The previous look and feel handler is deleted. All the objects created with this display instance, and currently held by an IlvGraphicHolder, will be notified of this change. See the method IlvGadget::updateLook for more information.

Parameters

lfh	The new look and feel handler.

void IlvDisplay::setPath ( const char * path )

Sets the display's search path.

Sets the entire display path to a copy of path.

Parameters

path	The path to be set.

void IlvDisplay::stopDump ( )

Temporarily stops output to a dump device.

Momentarily halts any existing output redirection.

void IlvDisplay::sync ( ) const

Flushes the output buffer and waits for completion.

Flushes the output buffer and waits until all the requests have been processed. On X, it calls XSync((Display*)_internal, 0);.

void IlvDisplay::synchronize ( IlBoolean value = IlTrue ) const

Sets synchronous mode.

Sets the connection to the server to the sync mode if value is IlTrue. On X, it calls XSynchronize((Display*)_internal, (int) value). Setting the connection to synchronous mode affects performance significantly, but is useful for debugging purposes.

Parameters

value A Boolean set to IlTrue to set the sync mode.

void IlvDisplay::useRightButtonValue ( IlBoolean flag )

Sets a flag for the right mouse button.

Sets the current status of the value set in the IlvEvent when the user clicks the right button on a mouse with only two buttons.

Parameters

flag	A Boolean value.

void IlvDisplay::waitAndDispatchEvents ( ) const

Reads and dispatches the next event.

Reads the next event and dispatches it.

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