SoXtInputFocus Class Reference

Reports input focus change events. More...

#include <Inventor/Xt/devices/SoXtInputFocus.h>

Inheritance diagram for SoXtInputFocus:

List of all members.

Public Member Functions

 SoXtInputFocus (EventMask mask=SO_XT_ALL_FOCUS_EVENTS)
 ~SoXtInputFocus ()
virtual void enable (SoWidget w, XtEventHandler f, XtPointer data, Window win=(Window) NULL)
virtual void disable (SoWidget w, XtEventHandler f, XtPointer data)
virtual const SoEventtranslateEvent (XAnyEvent *xevent)

Detailed Description

Reports input focus change events.

This class reports input focus change events (i.e. when the cursor crosses into or out of the window). There are no input focus event in Open Inventor, so this always returns NULL when asked to translate events. When this class is registered on a render area, the render area will receive X input focus change events. (This class is extensively employed by the viewer classes.)



Constructor & Destructor Documentation

SoXtInputFocus::SoXtInputFocus ( EventMask  mask = SO_XT_ALL_FOCUS_EVENTS  ) 


To the constructor, pass which input focus events you are interested in as a bitwise OR of the following values:

EnterWindowMask - Input focus entered the window.

LeaveWindowMask - Input focus left the window

Or simply pass the defined value SO_XT_ALL_FOCUS_EVENTS for all input focus events.

SoXtInputFocus::~SoXtInputFocus (  )  [inline]


Member Function Documentation

virtual void SoXtInputFocus::disable ( SoWidget  w,
XtEventHandler  f,
XtPointer  data 
) [virtual]

Disables the device for the passed widget.

Implements SoXtDevice.

virtual void SoXtInputFocus::enable ( SoWidget  w,
XtEventHandler  f,
XtPointer  data,
Window  win = (Window) NULL 
) [virtual]

Enables the device for the passed widget.

When enabled, the callback function f will be invoked when events occur in the window. data is the clientData which will be passed.

Implements SoXtDevice.

virtual const SoEvent* SoXtInputFocus::translateEvent ( XAnyEvent *  xevent  )  [virtual]

Attempts to convert the passed event into an SoEvent.

Returns a pointer to an internal SoEvent object owned by the class. Do not delete this object. If the message was not generated by this device, then NULL is returned.

Implements SoXtDevice.

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

Open Inventor Toolkit reference manual, generated on 16 Jul 2020
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