SoXt - routines for Inventor/Xt compatibility.

SoXt

#include <Inventor/Xt/SoXt.h> Methods from class SoXt: c } c } init(const char *appName, const char *className = "Inventor")

c } c } init(Widget topLevelWidget)

c } c } mainLoop()

c } c } nextEvent(XtAppContext appContext, XEvent *event)

c } c } dispatchEvent(XEvent *event)

c } c } getAppContext()

c } c } getDisplay()

c } c } getTopLevelWidget()

c } c } show(Widget widget)

c } c } hide(Widget widget)

c } c } encodeString(char *s)

c } c } decodeString(XmString xs)

c } c } setWidgetSize(Widget w, const SbVec2s &size)

c } c } getWidgetSize(Widget w)

c } c } getShellWidget(Widget w)

c } c } createSimpleErrorDialog(Widget widget, char *dialogTitle, char *errorStr1, char *errorStr2 = NULL)

c } c } getPopupArgs(Display *d, int scr, ArgList args, int *n)

c } c } registerColormapLoad(Widget widget, Widget shell)

c } c } addColormapToShell(Widget widget, Widget shell)

c } c } removeColormapFromShell(Widget widget, Widget shell)

The SoXt class initializes Inventor for use with the Xt toolkit and Motif. SoXt::init() must be called in order for Inventor to work properly with Xt. SoXt::mainLoop() must be called in order for extension device events to be passed to Inventor render areas. The other methods are convenience functions. Refer to the SoXtComponent man pages for examples on how this class should be used when using Inventor Xt components.

c } c } init(const char *appName, const char *className = "Inventor")

This is called to initialize Inventor and Xt, and bind Inventor with Xt event handling so that Inventor sensors will work correctly. This returns the top level shell widget. This method will call SoDB::init(), SoNodeKit::init(), SoInteraction::init() and XtAppInitialize(). c } c } init(Widget topLevelWidget)

This alternate form of init allows the application to initialize Xt. The passed widget should be the top level shell widget returned from the Xt initializiation. This method will call SoDB::init(), SoNodeKit::init(), SoInteraction::init() and XtAppInitialize(). c } c } mainLoop()

This retrieves and dispatches events (loops forever). Unlike Xt which ignores extension devices (i.e. any device besides mouse and keyboard), this main loop will dispatch events from input extension devices like the spaceball. It calls SoXt::nextEvent() and SoXt::dispatchEvent() to do this. If only the mouse and keyboard devices are used, this is equivalent to calling XtAppMainLoop(). c } c } nextEvent(XtAppContext appContext, XEvent *event)

Get the nextEvent by calling XtAppNextEvent(). The appContext can be had by calling SoXt::getAppContext(). c } c } dispatchEvent(XEvent *event)

Dispatch the passed event to a handler. Mouse and keyboard events are dispatched by calling XtDispatchEvent(). Events from input extension devices are dispatched by code implemented in this routine. This returns True if a handler was found, else it returns False. c } c } getAppContext()

c } c } getDisplay()

c } c } getTopLevelWidget()

These return information based on the top level widget returned by or passed to init. c } c } show(Widget widget)

c } c } hide(Widget widget)

Convenience routines to show and hide the passed widget. For a shell widget, this is equivalent to calling RealizeWidget() + XMapWindow() or XMapRaised() if window already exists (raise and de-iconify). hide() will then call XUnmapWindow(). For a subwidget, those simply calls XtManageChild() and XtUnmanageChild(). c } c } encodeString(char *s)

c } c } decodeString(XmString xs)

These are convenience routines for encoding a character string as an XmString, and decoding an XmString back to a character string. (XmString is a Motif string). The application is responsible for freeing up the memory pointed to by these return values. Use XmStringFree() to free an XmString, and free() to free a character pointer. c } c } setWidgetSize(Widget w, const SbVec2s &size)

c } c } getWidgetSize(Widget w)

Convenience routines to set/get the size of the given widget. Those are equivalent to calling XtSetValues() and XtGetValues() on XtNheight and XtNwidth widget resources. c } c } getShellWidget(Widget w)

Convenience routine which will return the ShellWidget containing the given widget. The widget tree is traversed up until a shell widget is found using XtIsShell(). c } c } createSimpleErrorDialog(Widget widget, char *dialogTitle, char *errorStr1, char *errorStr2 = NULL)

Convenience routine which brings a simple motif error dialog box displaying the given error string(s) and window title. The OK button, which destroys the dialog, is the only button displayed. The widget argument is used to create and center the dialog ( using XmCreateErrorDialog()). c } c } getPopupArgs(Display *d, int scr, ArgList args, int *n)

Convenience routine which gets visual args for the popup planes. These args can then be passed in to XmCreatePulldownMenu() or XmCreatePopupMenu() to create menus in the popup planes. registerColormapLoad() must be called for each pulldown menu to properly load/unload the overlay color map on the shell when needed. c } c } registerColormapLoad(Widget widget, Widget shell)

Convenience routine which will register map/unmap callbacks to load and unload the pulldown menu color map right before the menu is about to be posted. This should be called when creating pulldown or popup menus in the overlays. This will make sure that the right color map is loaded into the shell widget (to make the pulldown/popup look right) and remove it when no longer needed (to make sure the OpenGL overlay widget color map is correctly loaded for 8 bit machines). c } c } addColormapToShell(Widget widget, Widget shell)

c } c } removeColormapFromShell(Widget widget, Widget shell)

Convenience routine to insert/remove the given widget colormap onto the supplied shell widget. This will not replace the existing installed colormaps (or list of windows), but instead insert the new colormap first into the existing list using XGetWMColormapWindows() and XSetWMColormapWindows().

SoXtComponent