Component for OpenGL rendering. More...

#include <Inventor/Qt/SoQtGLWidget.h>

Inheritance diagram for SoQtGLWidget:

Public Types
enum	FloatColorBufferSize { FLOAT_16_COLOR_BUFFER = SoGuiGLWidget::FLOAT_16_COLOR_BUFFER , FLOAT_32_COLOR_BUFFER = SoGuiGLWidget::FLOAT_32_COLOR_BUFFER }
	FloatColorBufferSize. More...

Public Member Functions
int	getColorMapSize ()
	Returns the color map size.

void	setColorMapSize (int size)
	Sets the color map size.

virtual WindowQt	getNormalWindow ()
	Gets the normal GL window (window system identifier of the widget), which is needed as an argument to glXMakeCurrent() (on Xt) or SbGlContextHelper::makeCurrent() (on Windows) when drawing in the normal planes.

QOpenGLContext *	getQOpenGLContext ()
	Gets the current context, which is needed as an argument to glXMakeCurrent() (on Xt) or SbGlContextHelper::makeCurrent() (on Windows) when drawing in the normal planes.

SoGLContext *	getNormalSoContext ()
	Gets the current context, which is needed as an argument to glXMakeCurrent() (on Xt) or SbGlContextHelper::makeCurrent() (on Windows) when drawing in the normal planes.

QWidget *	getNormalWidget ()
	Gets the current normal widget.

QSurfaceFormat	getQSurfaceFormat ()
	Returns the QSurfaceFormat currently used.

virtual void	setNormalVisual (QSurfaceFormat vis)
	Sets the visual/pixel format for the normal window.

virtual void	setNormalVisual (const SoGLFormat &format)
	Sets the visual/pixel format for the normal window.

virtual void	show ()
	This shows the component.

virtual void	hide ()
	This hides the component.

virtual void	setDoubleBuffer (SbBool onOrOff)
	Routine that dynamically changes between single and double buffering.

SbBool	isDoubleBuffer ()
	Returns whether double buffering is on or off.

void	setBorder (SbBool onOrOff)
	Included for portability only.

int	getBorderSize ()
	Included for portability only.

SbBool	isBorder () const
	Included for portability only.

void	setDrawToFrontBufferEnable (SbBool enableFlag)
	Sets drawing to the front buffer.

SbBool	isDrawToFrontBufferEnable () const
	Queries drawing to the front buffer.

virtual SbBool	bindNormalContext ()
	Makes the normal rendering context the current context.

virtual SbBool	unbindNormalContext ()
	unbind the current context (previously bind with bindNormalContext );

virtual SbBool	swapNormalBuffers ()
	Swaps the normal front and back buffers.

virtual void	setCursor (const QCursor &newCursor)
	Sets the current cursor.

QCursor	getCursor () const
	Returns the current cursor.

void	setAntialiasing (const float quality, const SoSceneManager::AntialiasingMode mode=SoSceneManager::AUTO)
	Enable (or disable) antialiasing with specified quality and mode.

void	setAntialiasing (SoAntialiasingParameters *advancedParameters)
	Enable (or disable) antialiasing with specific parameters.

float	getAntialiasingQuality () const
	Returns the antialiasing quality set using the setAntialiasing(float,AntialiasingMode) method.

SoSceneManager::AntialiasingMode	getAntialiasingMode () const
	Returns the antialiasing mode set using the setAntialiasing(float,AntialiasingMode) method.

SoAntialiasingParameters *	getAntialiasingParameters () const
	Returns the antialiasing parameters set using the setAntialiasing(SoAntialiasingParameters*) method.

bool	saveSnapshot (const SbString &filename, bool overwrite=true)
	Save a snapshot of the current image displayed in the viewer.

Public Member Functions inherited from SoQtComponent
SbBool	isVisible ()
	Returns TRUE if this component is mapped onto the screen.

virtual QWidget *	getWidget () const
	This returns the base widget handle for this component.

SbBool	isTopLevelShell () const
	Returns TRUE if this component is a top level shell component (has its own window).

QWidget *	getShellWidget () const
	Returns the topLevelShell widget handle (NULL if the topLevelShell hasn't been created by this component).

QWidget *	getParentWidget () const
	Returns the parent widget handle.

void	setSize (const SbVec2s &size)
	Convenience routine on the widget handle.

SbVec2s	getSize ()
	Convenience routine on the widget handle.

virtual SbBool	setFullScreen (const SbBool enable)
	Switches the viewer into (or out of) fullscreen mode.

SbBool	isFullScreen (void) const
	Queries if the viewer is in fullscreen mode.

void	setFullScreenEnable (const SbBool enable)
	Enables/disables fullscreen mode.

SbBool	isFullScreenEnable (void) const
	Queries if it is possible to put the viewer in fullscreen mode.

SbGlContextHelper::Display	getDisplay ()
	On UNIX, returns the X display associated with this components widget.

void	setTitle (const char *newTitle)
	Sets window title.

void	setTitle (const SbString &newTitle)
	Sets window title.

void	setTitle (const QString &newTitle)
	Sets window title.

const QString	getTitle () const
	Gets window title.

void	setIconTitle (const QString &newIconTitle)
	Included for portability only.

const QString	getIconTitle () const
	Included for portability only.

SbString	getWidgetName () const
	Returns the widget handle name.

SbString	getClassName () const
	Returns the class name.

void	setWindowCloseCallback (SoQtComponentCB func, void data=NULL)
	Sets which callback to call when the user closes this component (double click in the upper left corner) - by default hide() is called on this component, unless a callback is set to something other than NULL.

Friends
class	SoQGLWidgetProxy

Additional Inherited Members
Static Public Member Functions inherited from SoQtComponent
static SoQtComponent *	getComponent (QWidget *widget)
	Returns the SoQtComponent for this widget handle.

Public Attributes inherited from SoQtComponent
SbString	helpFileName
	Name of help file to open when the viewer Help button is pressed.

Detailed Description

Component for OpenGL rendering.

This abstract base class provides a C++ wrapper around an OpenGL widget. It allows OpenGL rendering to be performed within a widget and is used by the SoQtRenderArea. SoQtGLWidget uses a parent window with two separate OpenGL widgets (one for single and one for double buffering), with routines to return the appropriate windows.

Subclasses only need to redefine the redraw() routine for rendering and processEvent() routine if they are interested in receiving Q events.

Member Enumeration Documentation

◆ FloatColorBufferSize

enum SoQtGLWidget::FloatColorBufferSize

FloatColorBufferSize.

Enumerator
FLOAT_16_COLOR_BUFFER	16-bit rendering per component.
FLOAT_32_COLOR_BUFFER	32-bit rendering per component.

Definition at line 97 of file SoQtGLWidget.h.

Member Function Documentation

◆ bindNormalContext()

virtual SbBool SoQtGLWidget::bindNormalContext ( )

virtual

Makes the normal rendering context the current context.

Equivalent to makeNormalCurrent() call.

◆ getAntialiasingMode()

SoSceneManager::AntialiasingMode SoQtGLWidget::getAntialiasingMode ( ) const

Returns the antialiasing mode set using the setAntialiasing(float,AntialiasingMode) method.

Returns AUTO by default. Parameters set using the setAntialiasing(SoAntialiasingParameters*) method may change the antialiasing mode, but do not affect the value returned by this method. Therefore this method does not necessarily return the current actual antialiasing mode.

◆ getAntialiasingParameters()

SoAntialiasingParameters * SoQtGLWidget::getAntialiasingParameters ( ) const

Returns the antialiasing parameters set using the setAntialiasing(SoAntialiasingParameters*) method.

Returns null by default. A quality value set using the setAntialiasing(float,AntialiasingMode) method may modify internal parameters, but does not affect the value returned by this method. Therefore this method does not necessarily return the current actual antialiasing parameters.

◆ getAntialiasingQuality()

float SoQtGLWidget::getAntialiasingQuality ( ) const

Returns the antialiasing quality set using the setAntialiasing(float,AntialiasingMode) method.

Returns 0.0 by default. Parameters set using the setAntialiasing(SoAntialiasingParameters*) method override internal parameters, but do not affect the value returned by this method. Therefore this method does not necessarily return the current actual antialiasing quality.

◆ getBorderSize()

int SoQtGLWidget::getBorderSize ( )

inline

Included for portability only.

Definition at line 221 of file SoQtGLWidget.h.

◆ getColorMapSize()

int SoQtGLWidget::getColorMapSize ( )

Returns the color map size.

◆ getCursor()

QCursor SoQtGLWidget::getCursor ( ) const

Returns the current cursor.

◆ getNormalSoContext()

SoGLContext * SoQtGLWidget::getNormalSoContext ( )

Gets the current context, which is needed as an argument to glXMakeCurrent() (on Xt) or SbGlContextHelper::makeCurrent() (on Windows) when drawing in the normal planes.

Note: This should not be cached by users because it will change as OpenGL format changes.

◆ getNormalWidget()

QWidget * SoQtGLWidget::getNormalWidget ( )

Gets the current normal widget.

Since Open Inventor 8.0, this widget is a QWidget. More information about this class can be found on-line in the Qt documentation.

Note: This should not be cached by users because it will change as OpenGL format changes.

◆ getNormalWindow()

virtual WindowQt SoQtGLWidget::getNormalWindow ( )

virtual

Gets the normal GL window (window system identifier of the widget), which is needed as an argument to glXMakeCurrent() (on Xt) or SbGlContextHelper::makeCurrent() (on Windows) when drawing in the normal planes.

Note: This should not be cached by users because it will change as single/double buffering changes.

◆ getQOpenGLContext()

QOpenGLContext * SoQtGLWidget::getQOpenGLContext ( )

Gets the current context, which is needed as an argument to glXMakeCurrent() (on Xt) or SbGlContextHelper::makeCurrent() (on Windows) when drawing in the normal planes.

Note: This should not be cached by users because it will change as OpenGL format changes.

◆ getQSurfaceFormat()

QSurfaceFormat SoQtGLWidget::getQSurfaceFormat ( )

Returns the QSurfaceFormat currently used.

◆ hide()

virtual void SoQtGLWidget::hide ( )

virtual

This hides the component.

Reimplemented from SoQtComponent.

Reimplemented in SoQtFullViewer.

◆ isBorder()

SbBool SoQtGLWidget::isBorder ( ) const

inline

Included for portability only.

Definition at line 226 of file SoQtGLWidget.h.

◆ isDoubleBuffer()

SbBool SoQtGLWidget::isDoubleBuffer ( )

inline

Returns whether double buffering is on or off.

Definition at line 211 of file SoQtGLWidget.h.

◆ isDrawToFrontBufferEnable()

SbBool SoQtGLWidget::isDrawToFrontBufferEnable ( ) const

inline

Queries drawing to the front buffer.

Definition at line 237 of file SoQtGLWidget.h.

◆ saveSnapshot()

bool SoQtGLWidget::saveSnapshot	(	const SbString &	filename,
		bool	overwrite = `true`
	)

Save a snapshot of the current image displayed in the viewer.

The image is read back from the OpenGL framebuffer and will be the same size as the viewer's drawing window. Returns true if successful.

Notes:

Depending on the operating system and graphics hardware, it is possible that the image could be incomplete if the viewer window is overlapped by other windows.
The supported image file formats are: BMP (Windows only), JPEG, PNG and TIFF.
The image file format to write is determined by the extension of the specified filename, e.g. ".png" for PNG format.
For BMP and JPEG formats an RGB image is written.
For PNG and TIFF formats, an RGBA (RGB plus alpha channel) image is always written.
Writing an RGBA image means the image background is transparent. Actually an RGBA snapshot can not be saved without transparency. To get the displayed image without transparency, use the BMP or the JPEG format.
To generate an image with a different size or different options, use SoOffscreenRenderArea instead.
The specified filename must include a directory or nothing will be written. Can be simply "./filename.png", but just "filename.png" won't work.

Parameters

filename	Fully qualified file path for the snapshot file. The specified filename must end with one of the extensions supported by SoJPEGImageRW (jpg, jpeg, ...), SoPNGImageRW (png), SoBMPImageRW (bmp), or SoTIFFImageRW (tif, ...).
overwrite	If true, overwrite any existing file with the same name (default is true).

◆ setAntialiasing() [1/2]

void SoQtGLWidget::setAntialiasing	(	const float	quality,
		const SoSceneManager::AntialiasingMode	mode = `SoSceneManager::AUTO`
	)

Enable (or disable) antialiasing with specified quality and mode.

Specific antialiasing parameters will be set automatically based on the quality value. Note that the quality and mode settings are overridden if specific antialiasing parameters are subsequently set using the setAntialiasing(SoAntialiasingParameters*) method.

The default mode is AUTO but this may be overridden by setting the environment variable OIV_ANTIALIASING_DEFAULT_MODE (see SoPreferences).

Parameters

quality	The quality is a factor in the range [0.0,1.0]. Use the value 0.0 to turn off antialiasing. 0.5 is a typical value.
mode	The antialiasing algorithm. Default is AUTO, which means use the best for the current hardware. Use the value NO_ANTIALIASING to turn off antialiasing.

◆ setAntialiasing() [2/2]

void SoQtGLWidget::setAntialiasing ( SoAntialiasingParameters * advancedParameters )

Enable (or disable) antialiasing with specific parameters.

Use one of the subclasses of SoAntialiasingParameters. The antialiasing mode is determined by which subclass is used to set the parameters. For example, passing an SoFXAAParameters object automatically sets FXAA mode. Note that the parameters are overridden if a quality and mode are subsequently set using the setAntialiasing(float,AntialiasingMode) method.

NOTES

When the antialiasing parameters are modified a listener is called if it has been defined. See also setAntialiasingEventListener().
The caller is responsible for allocation and destruction of the advancedParameters object. SoSceneManager makes a copy of the parameter values, so the object can be destroyed after calling this method.

Parameters

advancedParameters Provides specific parameters for an antialiasing mode.
Use a null parameter to turn off antialiasing or use one of the subclasses of SoAntialiasingParameters.

◆ setBorder()

void SoQtGLWidget::setBorder ( SbBool onOrOff )

Included for portability only.

◆ setColorMapSize()

void SoQtGLWidget::setColorMapSize ( int size )

Sets the color map size.

◆ setCursor()

virtual void SoQtGLWidget::setCursor ( const QCursor & newCursor )

virtual

Sets the current cursor.

If you are using a viewer class, the viewer will automatically change the cursor depending on the viewer mode. These changes will override the cursor set with this method unless you also call SoQtGLWidget::setCursorEnabled(FALSE).

◆ setDoubleBuffer()

virtual void SoQtGLWidget::setDoubleBuffer ( SbBool onOrOff )

virtual

Routine that dynamically changes between single and double buffering.

Default is double buffer off. (The SoQtRenderArea subclass makes it double buffer by default.)

◆ setDrawToFrontBufferEnable()

void SoQtGLWidget::setDrawToFrontBufferEnable ( SbBool enableFlag )

Sets drawing to the front buffer.

Controls drawing to the front buffer when an obscured portion of the window is exposed. Default: TRUE.

◆ setNormalVisual() [1/2]

virtual void SoQtGLWidget::setNormalVisual ( const SoGLFormat & format )

virtual

Sets the visual/pixel format for the normal window.

This allows the user to create all possible visuals supported by OpenGL. The OpenGL drivers or accelerated hardware may or may not support advanced features such as alpha channel or stereographic viewing. If you request some features that the driver/hardware does not provide when you set the QGLFormat , you will get a rendering context with the nearest subset of features.

The methods for setting the visual are virtual so that derived classes can know when the visual is changing.

◆ setNormalVisual() [2/2]

virtual void SoQtGLWidget::setNormalVisual ( QSurfaceFormat vis )

virtual

Sets the visual/pixel format for the normal window.

This allows the user to create all possible visuals supported by OpenGL. The OpenGL drivers or accelerated hardware may or may not support advanced features such as alpha channel or stereographic viewing. If you request some features that the driver/hardware does not provide when you set the QGLFormat , you will get a rendering context with the nearest subset of features.

The methods for setting the visual are virtual so that derived classes can know when the visual is changing.

◆ show()

virtual void SoQtGLWidget::show ( )

virtual

This shows the component.

Reimplemented from SoQtComponent.

◆ swapNormalBuffers()

virtual SbBool SoQtGLWidget::swapNormalBuffers ( )

virtual

Swaps the normal front and back buffers.

◆ unbindNormalContext()

virtual SbBool SoQtGLWidget::unbindNormalContext ( )

virtual

unbind the current context (previously bind with bindNormalContext );

Friends And Related Symbol Documentation

◆ SoQGLWidgetProxy

friend class SoQGLWidgetProxy

friend

Definition at line 563 of file SoQtGLWidget.h.

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

Inventor/Qt/SoQtGLWidget.h

Open Inventor Release 2023.2.3

Public Types

Public Member Functions

Friends

Additional Inherited Members

Detailed Description

SEE ALSO

Member Enumeration Documentation

◆ FloatColorBufferSize

Member Function Documentation

◆ bindNormalContext()

◆ getAntialiasingMode()

◆ getAntialiasingParameters()

◆ getAntialiasingQuality()

◆ getBorderSize()

◆ getColorMapSize()

◆ getCursor()

◆ getNormalSoContext()

◆ getNormalWidget()

◆ getNormalWindow()

◆ getQOpenGLContext()

◆ getQSurfaceFormat()

◆ hide()

◆ isBorder()

◆ isDoubleBuffer()

◆ isDrawToFrontBufferEnable()

◆ saveSnapshot()

◆ setAntialiasing() [1/2]

◆ setAntialiasing() [2/2]

NOTES

◆ setBorder()

◆ setColorMapSize()

◆ setCursor()

◆ setDoubleBuffer()

◆ setDrawToFrontBufferEnable()

◆ setNormalVisual() [1/2]

◆ setNormalVisual() [2/2]

◆ show()

◆ swapNormalBuffers()

◆ unbindNormalContext()

Friends And Related Symbol Documentation

◆ SoQGLWidgetProxy