NAME

       SoQtComponent -

       The SoQtComponent class is the base class for all GUI components.

SYNOPSIS

       #include <Inventor/Qt/SoQtComponent.h>

       Inherits SoQtObject.

       Inherited by SoQtGLWidget.

   Public Member Functions
       virtual ~SoQtComponent ()
       virtual void show (void)
       virtual void hide (void)
       virtual void setComponentCursor (const SoQtCursor &cursor)
       SbBool isFullScreen (void) const
       SbBool setFullScreen (const SbBool onoff)
       SbBool isVisible (void)
       SbBool isTopLevelShell (void) const
       QWidget * getWidget (void) const
       QWidget * getBaseWidget (void) const
       QWidget * getShellWidget (void) const
       QWidget * getParentWidget (void) const
       void setSize (const SbVec2s size)
       SbVec2s getSize (void) const
       void setTitle (const char *const title)
       const char * getTitle (void) const
       void setIconTitle (const char *const title)
       const char * getIconTitle (void) const
       const char * getWidgetName (void) const
       const char * getClassName (void) const
       void setWindowCloseCallback (SoQtComponentCB *const func, void *const user=NULL)

   Static Public Member Functions
       static void setWidgetCursor (QWidget *w, const SoQtCursor &cursor)
       static SoQtComponent * getComponent (QWidget *widget)
       static void initClasses (void)

   Protected Member Functions
       SoQtComponent (QWidget *const parent=NULL, const char *const name=NULL, const SbBool
           embed=TRUE)
       virtual void afterRealizeHook (void)
       void setClassName (const char *const name)
       void setBaseWidget (QWidget *widget)
       void registerWidget (QWidget *widget)
       void unregisterWidget (QWidget *widget)
       virtual const char * getDefaultWidgetName (void) const
       virtual const char * getDefaultTitle (void) const
       virtual const char * getDefaultIconTitle (void) const
       virtual void sizeChanged (const SbVec2s &size)
       void addVisibilityChangeCallback (SoQtComponentVisibilityCB *const func, void *const
           user=NULL)
       void removeVisibilityChangeCallback (SoQtComponentVisibilityCB *const func, void *const
           user=NULL)

   Friends
       class SoGuiComponentP
       class SoQtComponentP

Detailed Description

       The SoQtComponent class is the base class for all GUI components.

       Components in the SoQt component library all inherit this abstract base class. It provides
       basic methods for setting and querying about the relationship between the component object
       and its underlying Qt object(s).

       Application programmers should not need to interface any code against this class, unless
       they want to extend the SoQt library in entirely new directions. For making new viewer
       components, for instance, other classes further down the inheritance hierarchy would be
       better suited for subclassing.

       Note that the relationship between all SoQtComponent derived classes and Qt widgets is one
       of 'has-A', not 'is-A' -- i.e. SoQtComponent contains a QWidget *, it doesn't derive from
       or subclass it.

Constructor & Destructor Documentation

   SoQtComponent::~SoQtComponent () [virtual]
       Destructor.

       References unregisterWidget().

   SoQtComponent::SoQtComponent (QWidget *constparent = NULL, const char *constname = NULL, const
       SbBoolembed = TRUE) [protected]
       This is a protected constructor, used only by derived classes.

       The parent argument is the parent widget of the component. If you don't supply a parent,
       the main window (the one given to or returned from SoQt::init()) is used (and the embed
       argument is considered to be FALSE).

       The name argument is the name of the component. If you don't supply one, the name will
       default to something, depending on the inheritance hierarchy.

       The embed argument tells wether the component should be embedded in the parent widget or
       should create its own shell. This flag is only checked if the parent widget argument is
       specified (not NULL).

       If you create a non-embedded component, the component will create its own shell, which
       will be a toplevelshell type. If you embed the component, the component will create a
       formwidget type widget inside the parent widget, which you can get the handle of by
       calling SoQtComponent::getBaseWidget().

       References getDefaultWidgetName(), and setClassName().

Member Function Documentation

   void SoQtComponent::show (void) [virtual]
       This will show the widget, de-iconifiying and raising it if necessary.

       See Also:
           hide(), isVisible()

       This function must be called by subclasses after the component's widget has been otherwise
       initialized.

       References sizeChanged().

   void SoQtComponent::hide (void) [virtual]
       This will hide the widget.

       See Also:
           show(), isVisible()

   void SoQtComponent::setComponentCursor (const SoQtCursor &cursor) [virtual]
       Sets the cursor for this component.

       Note: not part of the original SGI InventorXt API.

       Reimplemented in SoQtFullViewer.

       References getWidget(), and setWidgetCursor().

   void SoQtComponent::setWidgetCursor (QWidget *w, const SoQtCursor &cursor) [static]
       Set cursor for a native widget in the underlying toolkit.

       Note: not part of the original SGI InventorXt API.

       References SoQtCursor::BUSY, SoQtCursor::CROSSHAIR, SoQtCursor::CUSTOM_BITMAP,
       SoQtCursor::DEFAULT, SoQtCursor::getCustomCursor(), SoQtCursor::getShape(), and
       SoQtCursor::UPARROW.

       Referenced by setComponentCursor(), and SoQtFullViewer::setComponentCursor().

   SbBool SoQtComponent::isFullScreen (void) const
       Returns if this widget/component is in full screen mode.

   SbBool SoQtComponent::setFullScreen (const SbBoolonoff)
       Toggle full screen mode for this component, if possible.

       Returns FALSE if operation failed. This might happen if the toolkit doesn't support
       attempts at making the component cover the complete screen or if the component is not a
       toplevel window.

       References getParentWidget(), getShellWidget(), and getWidget().

   SbBool SoQtComponent::isVisible (void)
       Returns visibility status on the widget. If any parents of this widget or this widget
       itself is hidden, returns FALSE.

       Note that a widget which is just obscured by other windows on the desktop is not hidden in
       this sense, and TRUE will be returned.

       See Also:
           show(), hide()

       Referenced by SoQtRenderArea::actualOverlayRedraw(), SoQtRenderArea::actualRedraw(),
       SoQtRenderArea::redraw(), and SoQtRenderArea::redrawOverlay().

   SbBool SoQtComponent::isTopLevelShell (void) const
       Returns TRUE if this component is a toplevel shell, i.e. it has a window representation on
       the desktop.

       See Also:
           getShellWidget()

       Referenced by SoQtGLWidget::buildWidget(), getIconTitle(), getShellWidget(), and
       setIconTitle().

   QWidget * SoQtComponent::getWidget (void) const
       Returns a pointer to the component's window system widget.

       See Also:
           getShellWidget(), getParentWidget()

       Referenced by getIconTitle(), getShellWidget(), getTitle(), setBaseWidget(),
       setComponentCursor(), setFullScreen(), setIconTitle(), setSize(), and setTitle().

   QWidget * SoQtComponent::getBaseWidget (void) const
       An SoQtComponent may be composed of any number of widgets in parent-children relationships
       in a tree structure with any depth. This method will return the root widget in that tree.

       See Also:
           setBaseWidget()

   QWidget * SoQtComponent::getShellWidget (void) const
       This method returns the shell widget of the component, but only if it was created as a
       toplevel shell. NULL will be returned for embedded components.

       (The toplevel shell is the desktop window which contains the component.)

       To get the toplevel shell of embedded components, you can use the SoQt::getShellWidget()
       method.

       See Also:
           isTopLevelShell(), getWidget()

       References SoQt::getShellWidget(), getWidget(), and isTopLevelShell().

       Referenced by setFullScreen(), and setSize().

   QWidget * SoQtComponent::getParentWidget (void) const
       Returns the widget which is the parent (i.e. contains) this component's base widget.

       See Also:
           getWidget(), baseWidget(), isTopLevelShell()

       Referenced by setFullScreen(), SoQtConstrainedViewer::SoQtConstrainedViewer(),
       SoQtFullViewer::SoQtFullViewer(), SoQtGLWidget::SoQtGLWidget(), and
       SoQtViewer::SoQtViewer().

   void SoQtComponent::setSize (const SbVec2ssize)
       Resize the component widget.

       The method assumes the caller knows what he is doing.

       See Also:
           getSize()

       References getShellWidget(), getWidget(), and sizeChanged().

       Referenced by SoQtFullViewer::SoQtFullViewer().

   SbVec2s SoQtComponent::getSize (void) const
       Returns the component widget size.

       The size that is returned is a cached size value, not a value fetched from the GUI system.

       See Also:
           setSize()

       Referenced by SoQtRenderArea::setGLRenderAction().

   void SoQtComponent::setTitle (const char *consttitle)
       Set the window title of this component. The title will appear on the window title bar, if
       the component manages its own window.

       Note that there is one peculiarity to be aware of if you are using the non-commercial
       version of Qt: only window titles with the substring 'Qt' in them are allowed (!), and
       attempts to set a window title without this substring will simply be ignored.

       See Also:
           getTitle(), setIconTitle(), isTopLevelShell()

       References getWidget().

       Referenced by setBaseWidget().

   const char * SoQtComponent::getTitle (void) const
       Returns the window title.

       If a title has been set, that title will be returned. If no title has been set, the
       default title is returned.

       See Also:
           setTitle(), isTopLevelShell()

       References getWidget().

   void SoQtComponent::setIconTitle (const char *consttitle)
       This method sets the title of the icon representation of the window.

       The title will appear on the window icon, if the component manages its own window.

       See Also:
           getIconTitle(), setTitle(), isTopLevelShell()

       References SoQt::getShellWidget(), getWidget(), and isTopLevelShell().

   const char * SoQtComponent::getIconTitle (void) const
       Returns the title the window has when iconfied.

       If an icon title has been set, that icon title is returned. If no icon title has been set,
       the default icon title is returned.

       See Also:
           setIconTitle(), isTopLevelShell()

       References SoQt::getShellWidget(), getWidget(), and isTopLevelShell().

   const char * SoQtComponent::getWidgetName (void) const
       Returns name of the widget.

   const char * SoQtComponent::getClassName (void) const
       Returns class name of widget.

   void SoQtComponent::setWindowCloseCallback (SoQtComponentCB *constfunc, void *constdata =
       NULL)
       Set up a callback function to use when the component gets closed. A component must be a
       toplevel shell for this to have any effect.

       For toplevel shells with no close callback set, the window will simply be hidden. The
       typical action to take in the callback would be to delete the component.

       See Also:
           isTopLevelShell()

   SoQtComponent * SoQtComponent::getComponent (QWidget *widget) [static]
       Finds and returns the SoQtComponent corresponding to the given QWidget *, if any. If the
       widget does not seem to belong to any SoQtComponent, NULL will be returned.

   void SoQtComponent::initClasses (void) [static]
       This function initializes the type system for all the component classes. It is called
       indirectly for you when you call SoQt::init().

       See Also:
           SoQt::init(), SoQtDevice::initClasses()

       References SoQtObject::initClass().

       Referenced by SoQtObject::init().

   void SoQtComponent::afterRealizeHook (void) [protected],  [virtual]
       A function 'hook' / callback invoked just after the window for the component has been
       realized.

       Override this if you need specific initialization for your own component or viewer class
       to happen right after it has been made visible, but remember to call upwards in the
       inheritance hierarchy:

       void
       MyLittleViewer::afterRealizeHook(void)
       {
         <superclass>::afterRealizeHook();
         // [own initialization here]
       }

       Reimplemented in SoQtRenderArea, SoQtExaminerViewer, SoQtPlaneViewer, and SoQtFlyViewer.

   void SoQtComponent::setClassName (const char *constname) [protected]
       Set class name of component.

       See Also:
           getClassName(), componentClassName()

       Referenced by SoQtComponent(), SoQtConstrainedViewer::SoQtConstrainedViewer(),
       SoQtFullViewer::SoQtFullViewer(), SoQtGLWidget::SoQtGLWidget(), and
       SoQtViewer::SoQtViewer().

   void SoQtComponent::setBaseWidget (QWidget *widget) [protected]
       Set the core widget for this SoQt component. It is important that subclasses get this
       correct, as the widget set here will be the widget returned from query methods.

       See Also:
           baseWidget()

       References getDefaultIconTitle(), getDefaultTitle(), SoQt::getShellWidget(), getWidget(),
       registerWidget(), setTitle(), and unregisterWidget().

       Referenced by SoQtConstrainedViewer::SoQtConstrainedViewer(),
       SoQtFullViewer::SoQtFullViewer(), SoQtGLWidget::SoQtGLWidget(), and
       SoQtViewer::SoQtViewer().

   void SoQtComponent::registerWidget (QWidget *widget) [protected]
       This method should be used by subclasses to register the widgets they set up from the
       underlying native toolkit, so they can be 'reverse' mapped to the owner component.

       Subclasses failing to register the widgets they use will cause the
       SoQtComponent::getComponent() method to fail with those widgets.

       See Also:
           unregisterWidget(), getComponent()

       Referenced by SoQtGLWidget::buildWidget(), and setBaseWidget().

   void SoQtComponent::unregisterWidget (QWidget *widget) [protected]
       Remove a previously registered native toolkit widget from the widget-to-component mappings
       used by SoQtComponent::getComponent().

       See Also:
           registerWidget()

       Referenced by setBaseWidget(), ~SoQtComponent(), SoQtFullViewer::~SoQtFullViewer(), and
       SoQtGLWidget::~SoQtGLWidget().

   const char * SoQtComponent::getDefaultWidgetName (void) const [protected],  [virtual]
       This method returns the default name of a component widget class.

       It should be overridden by derived non-abstract classes for the topmost widget in the
       component to have a proper name.

       Reimplemented in SoQtRenderArea, SoQtExaminerViewer, SoQtFlyViewer, and SoQtPlaneViewer.

       Referenced by SoQtComponent().

   const char * SoQtComponent::getDefaultTitle (void) const [protected],  [virtual]
       This method returns the default window caption string of the component.

       It should be overridden by derived non-abstract classes so the window and popup menu will
       get a proper title.

       Reimplemented in SoQtRenderArea, SoQtExaminerViewer, SoQtFlyViewer, and SoQtPlaneViewer.

       Referenced by setBaseWidget().

   const char * SoQtComponent::getDefaultIconTitle (void) const [protected],  [virtual]
       This method returns the default icon title of the component.

       It should be overridden by derived non-abstract classes so icons will get proper titles.

       Reimplemented in SoQtRenderArea, SoQtExaminerViewer, SoQtFlyViewer, and SoQtPlaneViewer.

       Referenced by setBaseWidget().

   void SoQtComponent::sizeChanged (const SbVec2s &size) [protected],  [virtual]
       Called internally from within the SoQt library when the widget embedded in a component
       changes it size, which is usually triggered by end-user interaction.

       This method is then invoked to notify the component that the size has changed. It is
       called from the top and all the way down to the bottom, the size being adjusted to take
       into account extra decorations having been added at each level in the component class
       hierarchy.

       Reimplemented in SoQtViewer, SoQtGLWidget, SoQtRenderArea, and SoQtFullViewer.

       Referenced by setSize(), and show().

   void SoQtComponent::addVisibilityChangeCallback (SoQtComponentVisibilityCB *constfunc, void
       *constuser = NULL) [protected]
       Add a callback which will be called whenever the widget component changes visibility
       status (because of iconification or deiconification, for instance).

       See Also:
           removeVisibilityChangeCallback(), isVisible()

   void SoQtComponent::removeVisibilityChangeCallback (SoQtComponentVisibilityCB *constfunc, void
       *constdata = NULL) [protected]
       Remove one of the callbacks from the list of visibility notification callbacks.

       See Also:
           addVisibilityChangeCallback(), isVisible()

Author

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