EZ_SetClientMessageHandler man page on DragonFly

EZ_SetClientMessageHandler man page on DragonFly

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EZ_SetClientMessageHandler(3)	EZWGL Functions	 EZ_SetClientMessageHandler(3)

NAME
       EZ_SetClientMessageHandler - register a client message handler

SYNOPSIS
       #include <EZ.h>

       void EZ_SetClientMessageHandler( EZ_EventHandler handler, void *data)

ARGUMENTS
       handler	Specifies a client message handler.

       data  Specifies a client data to be passed to handler when invoked.

DESCRIPTION
       EZ_SetClientMessageHandler   registers  a  client message handler to an
       EZWGL application. A client message handler is a procedure that handles
       ClientMessage  events.  Its primary function is to communicate with the
       window manager and other applications.  The default client message han‐
       dler handles only the message of type WM_PROTOCOLS/WM_DELETE_WINDOW.

       Here  is an example of a client message handler that refrain the window
       manager from closing a dialogue widget window.

	      Atom DeleteWindowAtom = EZ_GetAtom("WM_DELETE_WINDOW");
	      Atom WMProtocolsAtom = EZ_GetAtom("WM_PROTOCOLS");

	      void myClientMessageHandler(EZ_Widget *widget, void *data,
				       int etype, XEvent *xev)
	      {
		XClientMessageEvent *ev = (XClientMessageEvent *)xev;

		if(ev->message_type == WMProtocolsAtom)
		  {
		    Atom c = (ev->data.l)[0];
		    if(c == DeleteWindowAtom)
		   {
		     EZ_DisplayWidget(Dialogue);
		     EZ_SetGrab(Dialogue);
		   }
		  }
	      }

SEE ALSO
       EZ_AddEventHandler(3), EZ_AddWidgetCallBack(3)

EZWGL						 EZ_SetClientMessageHandler(3)

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