Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtmail/MotifApp/UIComponent.C

@@ -0,0 +1,237 @@
+/* $TOG: UIComponent.C /main/9 1998/07/23 17:57:36 mgreess $ */
+/*
+ *+SNOTICE
+ *
+ *	RESTRICTED CONFIDENTIAL INFORMATION:
+ *	
+ *	The information in this document is subject to special
+ *	restrictions in a confidential disclosure agreement bertween
+ *	HP, IBM, Sun, USL, SCO and Univel.  Do not distribute this
+ *	document outside HP, IBM, Sun, USL, SCO, or Univel wihtout
+ *	Sun's specific written approval.  This documment and all copies
+ *	and derivative works thereof must be returned or destroyed at
+ *	Sun's request.
+ *
+ *	Copyright 1993 Sun Microsystems, Inc.  All rights reserved.
+ *
+ *+ENOTICE
+ */
+///////////////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////////
+//         This example code is from the book:
+//
+//           Object-Oriented Programming with C++ and OSF/Motif
+//         by
+//           Douglas Young
+//           Prentice Hall, 1992
+//           ISBN 0-13-630252-1	
+//
+//         Copyright 1991 by Prentice Hall
+//         All Rights Reserved
+//
+//  Permission to use, copy, modify, and distribute this software for 
+//  any purpose except publication and without fee is hereby granted, provided 
+//  that the above copyright notice appear in all copies of the software.
+///////////////////////////////////////////////////////////////////////////////
+//////////////////////////////////////////////////////////////////////////////
+
+
+///////////////////////////////////////////////////////////////
+// UIComponent.C: Base class for all C++/Motif UI components
+///////////////////////////////////////////////////////////////
+#include <Dt/Wsm.h>
+#include "UIComponent.h"
+#include <assert.h>
+#include <stdio.h>
+
+UIComponent::UIComponent ( const char *name ) : BasicComponent ( name )
+{
+    // Empty
+    _numPendingTasks = 0;
+}
+
+
+void
+UIComponent::widgetDestroyedCallback( Widget, 
+				      XtPointer clientData, 
+				      XtPointer )
+{
+    UIComponent * obj = (UIComponent *) clientData;	
+    
+    obj->widgetDestroyed();
+}
+
+void
+UIComponent::widgetDestroyed()
+{
+    _w = NULL;
+}
+
+void
+UIComponent::installDestroyHandler()
+{
+    assert ( _w != NULL );
+    XtAddCallback ( _w, 
+		   XmNdestroyCallback,
+		   &UIComponent::widgetDestroyedCallback, 
+		   (XtPointer) this );
+}
+
+void
+UIComponent::manage()
+{
+    assert ( _w != NULL );
+    assert ( XtHasCallbacks ( _w, XmNdestroyCallback ) ==
+	    XtCallbackHasSome );
+    XtManageChild ( _w );
+}
+
+void
+UIComponent::displayInCurrentWorkspace()
+{
+    Widget w = baseWidget();
+    while (w && !XtIsShell(w)) w = XtParent(w);
+    if (w && XtIsShell(w)) displayInCurrentWorkspace(w);
+    manage();
+}
+
+void
+UIComponent::displayInCurrentWorkspace(Widget shell)
+{
+    while (shell && !XtIsShell(shell)) shell = XtParent(shell);
+
+    // Make sure the shell is popped up and occupying the current workspace.
+    if (NULL != shell && XtIsShell(shell))
+    {
+	Atom     pCurrent;
+	Display	*display = XtDisplay(shell);
+	Window	window = XtWindow(shell);
+
+        XtVaSetValues(shell, XmNiconic, False, NULL);
+	XRaiseWindow(display, window);
+
+	/* Get the current Workspace */
+	if (Success == DtWsmGetCurrentWorkspace(
+					display,
+					XRootWindowOfScreen(XtScreen(shell)),
+					&pCurrent))
+	{
+	    Atom *ws = NULL;
+	    unsigned long num = 0;
+	    int k;
+
+	    if (Success==DtWsmGetWorkspacesOccupied(display, window, &ws, &num))
+	    {
+		/* Already in this workspace? */
+		for (k = 0; k < num; k++)
+		  if (ws[k] == pCurrent) break;
+
+		/* Add to the workspace */
+		if (k >= num)
+		{
+		    size_t nbytes = sizeof(Atom) * (num+1);
+		    ws = (Atom*) XtRealloc((char*) ws, nbytes);
+		    ws[num] = pCurrent;
+		    DtWsmSetWorkspacesOccupied(display, window, ws, num + 1);
+		}
+
+		XFree((char *)ws);
+	    }
+	    else
+	      /* Change the hints to reflect the current workspace */
+	      DtWsmSetWorkspacesOccupied(display, window, &pCurrent, 1);
+	}
+    }
+}
+
+UIComponent::~UIComponent()
+{
+    // Make sure the widget hasn't already been destroyed
+    
+    if ( _w ) 
+    {
+	// Remove destroy callback so Xt can't call the callback
+	// with a pointer to an object that has already been freed
+	
+	XtRemoveCallback ( _w, 
+			  XmNdestroyCallback,
+			  &UIComponent::widgetDestroyedCallback,
+			  (XtPointer) this );	
+    }
+}
+
+void
+UIComponent::getResources( const XtResourceList resources, 
+			   const int numResources )
+{
+    // Check for errors
+    
+    assert ( _w != NULL );
+    assert ( resources != NULL );
+    
+    // Retrieve the requested resources relative to the 
+    // parent of this object's base widget
+    // Added support for doing getResources on the Application
+    
+    if ( XtParent( _w ) ) 
+	XtGetSubresources ( XtParent( _w ), 
+			    (XtPointer) this, 
+			    _name,
+			    className(),
+			    resources, 
+			    numResources,
+			    NULL, 
+			    0 );
+    else 
+	XtGetSubresources ( _w , 
+			    (XtPointer) this, 
+			    _name,
+			    className(),
+			    resources, 
+			    numResources,
+			    NULL, 
+			    0 );
+}
+
+
+#ifdef DEAD_WOOD
+void
+UIComponent::setDefaultResources( const Widget w, 
+				  const String *resourceSpec )
+{
+    int         i;	
+    Display    *dpy = XtDisplay ( w );	// Retrieve the display pointer
+    XrmDatabase rdb = NULL;		// A resource data base
+    
+    // Create an empty resource database
+
+    rdb = XrmGetStringDatabase ( "" );
+
+    // Add the Component resources, prepending the name of the component
+
+    i = 0;
+    while ( resourceSpec[i] != NULL )
+	{
+	    char *buf = new char[1000];
+	    sprintf(buf, "*%s%s", _name, resourceSpec[i++]);
+	    XrmPutLineResource( &rdb, buf );
+	    delete [] buf;
+	}
+
+    // Merge them into the Xt database, with lowest precendence
+    
+    if ( rdb )
+	{
+	    XrmDatabase db = XtDatabase(dpy);
+	    XrmCombineDatabase(rdb, &db, FALSE);
+	}
+}
+#endif /* DEAD_WOOD */
+
+#ifndef CAN_INLINE_VIRTUALS
+const char *const
+UIComponent::className(void)
+{
+    return "UIComponent";
+}
+#endif /* ! CAN_INLINE_VIRTUALS */