NAME¶

SoXtComponent — abstract base class for all Inventor Xt components

INHERITS FROM¶

SoXtComponent

SYNOPSIS¶

#include <Inventor/Xt/SoXtComponent.h>

typedef void SoXtComponentCB(void *userData, SoXtComponent *comp)

Methods from class SoXtComponent:

virtual void show()

virtual void hide()

SbBool isVisible()

Widget getWidget() const

SbBool isTopLevelShell() const

Widget getShellWidget() const

Widget getParentWidget() const

void setSize(const SbVec2s &size)

SbVec2s getSize()

Display * getDisplay()

void setTitle(const char *newTitle)

const char * getTitle() const

void setIconTitle(const char *newIconTitle)

const char * getIconTitle() const

void setWindowCloseCallback(SoXtComponentCB *func, void *data = NULL)

static SoXtComponent * getComponent(Widget w)

const char * getWidgetName() const

const char * getClassName() const

DESCRIPTION¶

Abstract base class from which all Inventor Xt components are derived. This class provides a basic C++ protocol for building and displaying Motif components. Components are used to encapsulate some function or task into a reusable package in the form of a Motif widget that can be used in any Inventor Xt program. See the Example section on how to build and use SoXtComponents.

METHODS¶

virtual void show()

virtual void hide()

This shows and hides the component. If this is a topLevelShell component, then show() will Realize and Map the window, otherwise it will simply Manage the widget. hide() calls the appropriate unmap or unmanage routines.

In addition, show() will also pop the component window to the top and de-iconify if necessary, to make sure the component is visible by the user.

SbBool isVisible()

Returns TRUE if this component is mapped onto the screen. For a component to be visible, it's widget and the shell containing this widget must be mapped (which is FALSE when the component is iconified).

Subclasses should call this routine before redrawing anything and in any sensor trigger methods. Calling this will check the current visibility (which is really cheap) and invoke the visibility changed callbacks if the state changes (see addVisibilityChangeCallback()).

Widget getWidget() const

This returns the base widget for this component. If the component created its own shell, this returns the topmost widget beneath the shell. Call getShellWidget() to obtain the shell.

SbBool isTopLevelShell() const

Widget getShellWidget() const

Returns TRUE if this component is a top level shell component (has its own window). Subclasses may use this to decide if they are allowed to resize themselves. Also method to return the shell widget (NULL if the shell hasn't been created by this component).

Widget getParentWidget() const

Return the parent widget, be it a shell or not

void setSize(const SbVec2s &size)

SbVec2s getSize()

Convenience routines on the widget — setSize calls XtSetValue

Display * getDisplay()

Returns the X display associated with this components widget.

void setTitle(const char *newTitle)

const char * getTitle() const

void setIconTitle(const char *newIconTitle)

const char * getIconTitle() const

The window and icon title can be set for topLevelShell components or components which are directly under a shell widget (i.e. components which have their own window).

void setWindowCloseCallback(SoXtComponentCB *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. A pointer to this class will be passed as the callback data.

Note: this callback is supplied because the user may wish to delete this component when it is closed.

static SoXtComponent * getComponent(Widget w)

This returns the SoXtComponent for this widget. If the widget is not an Inventor component, then NULL is returned.

const char * getWidgetName() const

const char * getClassName() const

Routines which return the widget name and the class name. The widget name is passed to the build method. The class name is predefined by each component. These names are used when retrieving X resource values for the component.

EXAMPLE¶

This example shows how an Inventor component can be built inside a program using the Xt widget set. The example uses the SoXtExaminerViewer widget to view some simple geometry.

#include <Inventor/Xt/SoXt.h>         
#include <Inventor/nodes/SoCone.h>
#include <Inventor/Xt/viewers/SoXtExaminerViewer.h>  
void main(int, char **argv)
{


    // Initialize Inventor and Xt, which must be done


    // before any Inventor calls are made.


    Widget myWindow = SoXt::init(argv[0]);


    


    // create the viewer in the toplevel window


    // and set some scene to display


    SoXtExaminerViewer *myViewer = new SoXtExaminerViewer(myWindow);


    myViewer->setSceneGraph( new SoCone() );


    


    // manage and map window on screen


    myViewer->show();


    SoXt::show(myWindow); // calls XtRealizeWidget()


    


    // Loop forever


    SoXt::mainLoop();
}

SEE ALSO¶

SoXt, SoXtRenderArea, SoXtViewer, SoXtMaterialEditor