XMDialogs.h

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/*
                    GNU GENERAL PUBLIC LICENSE
                       Version 2, June 1991

 Copyright (C) 1989, 1991 Free Software Foundation, Inc.
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 Everyone is permitted to copy and distribute verbatim copies
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*/
/*
** Facility:
**   Motif C++ class support.
** Abstract:
**   XMDialogs.h  - This file contains support for C++ access to Motif
**                  dialogs.
** Author:
**  Ron Fox
**  NSCL
**  Michigan State University
**  East Lansing, MI 48824-1321
** Versioning
**   @(#)XMDialogs.h    8.2 7/10/95 
*/

#ifndef XMDialogs_h
#define XMDialogs_h
#include <stdio.h>

#include <X11/StringDefs.h>
#include <Xm/MessageB.h>
#include <Xm/SelectioB.h>
#include <Xm/FileSB.h>

#include "XMWidget.h"
#include "XMPushbutton.h"
#include "XMManagers.h"
#include "XMCallback.h"

/*
** #Defines:
**
*/
#ifdef unix
#define XMFILE_DEFAULT_DIR     "./"
#define XMFILE_DEFAULT_DIRMASK "./*"
#endif

#ifdef VMS
#define XMFILE_DEFAULT_DIR     "SYS$DISK:[]"
#define XMFILE_DEFAULT_DIRMASK "SYS$DISK:[]*.*;0"
#endif

/* The message box is the parent widget type of all message like dialogs: */

class XMMessageBox : public XMManagedWidget
                   {
                   protected:
                     XMPushButton *okbutton;
                     XMPushButton *cancelbutton;
                     XMPushButton *helpbutton;
                     void GetButtons()
                       {
                         Widget wid;
                         wid = XmMessageBoxGetChild(id, XmDIALOG_OK_BUTTON);
                         okbutton = new XMPushButton(wid);

                         wid = XmMessageBoxGetChild(id, XmDIALOG_CANCEL_BUTTON);
                         cancelbutton = new XMPushButton(wid);

                         wid = XmMessageBoxGetChild(id, XmDIALOG_HELP_BUTTON);
                         helpbutton = new  XMPushButton(wid); 
                       }
                   public:
                     /* Constructors and destructors */

                     virtual ~XMMessageBox()
                       { delete okbutton;
                         delete cancelbutton;
                         delete helpbutton;
                       }
                     XMMessageBox(char *n) : XMManagedWidget(n) {}
                     XMMessageBox(Widget w) : XMManagedWidget(w)
                       {
                         GetButtons(); 
                       }
                     /* Get Button Widgets: */

                     XMPushButton *GetOkButton()     { return okbutton; }
                     XMPushButton *GetCancelButton() { return cancelbutton; }
                     XMPushButton *GetHelpButton()   { return helpbutton; }
                     
                     /* Modify the dialog text: */

                     virtual void SetText(char *txt)
               {
                         XmString s = XmStringCreateLtoR(txt, 
                                                     XmSTRING_DEFAULT_CHARSET);
                         SetAttribute(XmNmessageString, s);
                         XmStringFree(s);
                       }
                     /* Add Ok/Cancel callbacks: */

                     Callback_data *AddOkCallback(void (*cb)(XMWidget *w,
                                                   XtPointer, 
                                                   XtPointer),
                                        XtPointer cd = NULL)
                       {
                         return AddCallback(XmNokCallback, cb, cd);
                       }
                     Callback_data *AddCancelCallback(void (*cb)(XMWidget *w,
                                                       XtPointer,
                                                       XtPointer),
                                            XtPointer cd = NULL)
                       {
                         return AddCallback(XmNcancelCallback, cb, cd);
                       }
                     /* Label cancel/Help/OK buttons */

                     void LabelCancelButton(char *txt) 
                       { XmString str = XmStringCreateLtoR(txt, 
                                                 XmSTRING_DEFAULT_CHARSET);
                         SetAttribute(XmNcancelLabelString, str);
                         XmStringFree(str);
                       }
                     void LabelOkButton(char *txt)
                       {
                         XmString str = XmStringCreateLtoR(txt,
                                                 XmSTRING_DEFAULT_CHARSET);
                         SetAttribute(XmNokLabelString, str);
                         XmStringFree(str);
                       }
                     void LabelHelpButton(char *txt)
                       { helpbutton->Label(txt); }

                     /* Set default button types: */

                     void DefaultToOk()
                       { SetAttribute(XmNdefaultButtonType,
                                      XmDIALOG_OK_BUTTON);
                       }
                     void DefaultToCancel()
                       { SetAttribute(XmNdefaultButtonType,
                                      XmDIALOG_CANCEL_BUTTON);
                       }
                     void DefaultToHelp()
                       {
                         SetAttribute(XmNdefaultButtonType,
                                      XmDIALOG_HELP_BUTTON);
                       }
                     void Show() {
                       Manage();
                       XtPopup(XtParent(id), XtGrabNone);
                     }
                     void Hide() {
                       UnManage();
                     }
                     void SetModal(unsigned char modality)
                       { SetAttribute(XmNdialogStyle, modality); }
                   };



/* Error dialogs specialize the Message box widget for error messages */



class XMErrorDialog : public XMMessageBox
                   {
                   public:
                     /*  Constructors: */
                     XMErrorDialog(char *n, Widget parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount = 0):
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateErrorDialog(parent,
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         if(cb)
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMErrorDialog(char *n, XMWidget &parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount = 0):
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateErrorDialog(parent.getid(),
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         if(cb) 
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMErrorDialog(Widget w) : XMMessageBox(w)
                       {
                       }
                   };

/* Information dialogs specialize MessageBox for informative messages: */


class XMInformationDialog : public XMMessageBox
{
 public:
  /*  Constructors: */
  XMInformationDialog(char *n,Widget parent, char *msg,
                      void (*cb)(XMWidget *,
                                 XtPointer, XtPointer) = NULL,
                      XtPointer cbd = NULL,
                      ArgList list = NULL, Cardinal argcount=0) :
                        XMMessageBox(n)
                          {
                            id = XmCreateInformationDialog(parent,
                                                           name,
                                                           list,
                                                           argcount);
                            SetText(msg);
                            GetButtons();
                            LabelOkButton("Dismiss");
                            cancelbutton->Disable();
                            helpbutton->Disable();
                            if(cb)
                              AddOkCallback(cb, cbd);
                            Manage();
                            XtPopup(XtParent(id), XtGrabNone);
                          }
  XMInformationDialog(char *n, XMWidget &parent, char *msg,
                      void (*cb)(XMWidget *,
                                 XtPointer, XtPointer) = NULL,
                      XtPointer cbd = NULL,
                      ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateInformationDialog(
                                                                  parent.getid(),
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         if(cb) 
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                       XMInformationDialog(Widget w) : XMMessageBox(w)
                       {
                       }
                   };

/*  Message Dialogs: Put up interaction messages: */


class XMMessageDialog : public XMMessageBox
                   {
                   public:
                     /*  Constructors: */
                     XMMessageDialog(char *n,Widget parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateMessageDialog(parent,
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         if(cb)
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMMessageDialog(char *n, XMWidget &parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateMessageDialog(parent.getid(),
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         if(cb) 
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMMessageDialog(Widget w) : XMMessageBox(w)
                       {
                       }
                   };

/*  Question dialogs ask users questions about things: */

class XMQuestionDialog : public XMMessageBox
                   {
                   public:
                     /*  Constructors: */
                     XMQuestionDialog(char *n,Widget parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateQuestionDialog(parent,
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Yes");
                                         LabelCancelButton("No");
                                         helpbutton->Disable();
                                         if(cb)
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMQuestionDialog(char *n, XMWidget &parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateQuestionDialog(parent.getid(),
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Yes");
                                         LabelCancelButton("No");
                                         helpbutton->Disable();
                                         if(cb) 
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMQuestionDialog(Widget w) : XMMessageBox(w)
                       {
                       }
                   };
/*
**  XMQuestioner is a self contained version of the XMQuestionDialog
**  It makes available virtual functions for the Ok and Cancel buttons
**  which both just unmanage the dialog.  The user is supposed to derive
**  a class specific to their own application which replaces one or more
**  of the callback methods.
*/

class XMQuestioner : public XMQuestionDialog {
  public:
     XMQuestioner(char *n, Widget parent, char *msg,
                  XtPointer cbd,
                  ArgList list = NULL, Cardinal argcount = 0);
     XMQuestioner(char *n, XMWidget &parent, char *msg,
                  XtPointer cbd,
                  ArgList list = NULL, Cardinal argcount = 0);
     ~XMQuestioner();
  protected:
     XMCallback<XMQuestioner> yescallback;
     XMCallback<XMQuestioner> nocallback;
     virtual void Yescb(XMWidget *wid, XtPointer ud, XtPointer cd);
     virtual void Nocb(XMWidget *wid, XtPointer ud, XtPointer cd);
  private:

};
/* Warning dialogs warn the user of some impending disaster */


class XMWarningDialog : public XMMessageBox
                   {
                   public:
                     /*  Constructors: */
                     XMWarningDialog(char *n,Widget parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateWarningDialog(parent,
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         GetButtons();
                                         if(cb)
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMWarningDialog(char *n, XMWidget &parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateWarningDialog(parent.getid(),
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         GetButtons();
                                         if(cb) 
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMWarningDialog(Widget w) : XMMessageBox(w)
                       {
                       }
                   };

/*  Working dialogs let the user know something is happening */


class XMWorkingDialog : public XMMessageBox
                   {
                   public:
                     /*  Constructors: */
                     XMWorkingDialog(char *n,Widget parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateWorkingDialog(parent,
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         GetButtons();
                                         if(cb)
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMWorkingDialog(char *n, XMWidget &parent, char *msg,
                                   void (*cb)(XMWidget *,
                                              XtPointer, XtPointer) = NULL,
                                   XtPointer cbd = NULL,
                                   ArgList list = NULL, Cardinal argcount=0) :
                                     XMMessageBox(n)
                                       {
                                         id = XmCreateWorkingDialog(parent.getid(),
                                                                  name,
                                                                  list,
                                                                  argcount);
                                         SetText(msg);
                                         GetButtons();
                                         LabelOkButton("Dismiss");
                                         cancelbutton->Disable();
                                         helpbutton->Disable();
                                         GetButtons();
                                         if(cb) 
                                           AddOkCallback(cb, cbd);
                                         Manage();
                                         XtPopup(XtParent(id), XtGrabNone);
                                       }
                     XMWorkingDialog(Widget w) : XMMessageBox(w)
                       {
                       }
                   };

/*  In order to prevent a circular include file dependency, helpmenu.h has been
**  textually included here.  At some point another pass through the XM Object system
**  def must be done to eliminate some of these circular dependencies.
*/

/*
 ** Structure definitions:
 */

/* XM_help_client_data is a client data structure which is build to
 ** drive the XM_display_help callback function.
 */

struct XM_help_client_data { 
                                  char                *name; /* Widget name */
                                  XMInformationDialog *dialog; /* Widget object */
                                  char                **text; /* Help text. */
                                };

/*
 ** The following public items define the help menus which are described in
 ** helpmenu.cc:
 */

extern XM_help_client_data XM_About;
extern XM_help_client_data XM_Help_Overview;
/*
** The following are public entry points to the module:
*/

XMInformationDialog *XM_help(char *name, 
                                 XMWidget *parent, char **help_text);
void                 XM_display_help(XMWidget *caller,
                                         XtPointer client_data,
                                         XtPointer reason = NULL);



/*
**  SelectionBox is the base class for all the selection box dialogs.
**  These include:
**    List selection boxes,
**    File selection dialogs
** and Prompt dialogs.
**   While command widgets are similar in nature they are different since they
**   don't live in dialog shells.
**/
class XMSelection : public XMMessageBox
       {
       protected:
         XMPushButton *applybutton;
         void GetButtons() { /* Get the subwidget buttons: */

           Widget wid;
           wid = XmSelectionBoxGetChild(id, XmDIALOG_OK_BUTTON);
           okbutton = new XMPushButton(wid);
           
           wid = XmSelectionBoxGetChild(id, XmDIALOG_CANCEL_BUTTON);
           cancelbutton = new XMPushButton(wid);
           
           wid = XmSelectionBoxGetChild(id, XmDIALOG_HELP_BUTTON);
           helpbutton = new  XMPushButton(wid); 
           
           applybutton  = new XMPushButton(
                                   XmSelectionBoxGetChild(id,
                                                XmDIALOG_APPLY_BUTTON));
         }
       public:
         /*
         ** Constructors and destructors:
         */
         XMSelection(char *name) : XMMessageBox(name) {}
         XMSelection(Widget w)   : XMMessageBox(w) {
           GetButtons();
         }
         virtual ~XMSelection() {
           delete applybutton;
         }
         /*  Set the width of the text field: */

         void SetTextWidth(Cardinal n) {
           SetAttribute(XmNtextColumns, (short)n);
         }

         /* Functions to add callbacks to functions:  */

         Callback_data *AddDoCallback(void (*cb)(XMWidget *, /* Do callbacks are  */
                                       XtPointer, /* attached to both the ok */
                                       XtPointer), /* and the apply button. */
                            XtPointer client_data = NULL,
                                      Callback_data **apply = NULL) {
           Callback_data *apcb;
           apcb = AddCallback(XmNapplyCallback, cb, client_data);
           if (apply != NULL) *apply = apcb;
           return AddCallback(XmNokCallback, cb, client_data);
         }
         Callback_data *AddApplyCallback(void (*cb)(XMWidget *,
                                          XtPointer,
                                          XtPointer),
                               XtPointer client_data  = NULL) {
           return AddCallback(XmNapplyCallback, cb, client_data);
         }

         /* Get the button widgets: */

         XMPushButton *GetApplyButton() { return applybutton;}
        
         /* Labelling functions */

         virtual void SetText(char *txt) {
           XmString s = XmStringCreateLtoR(txt, XmSTRING_DEFAULT_CHARSET);
           SetAttribute(XmNtextString, s);
           XmStringFree(s);
         }
         virtual void SetLabelString(char *txt) {
           XmString s = XmStringCreateLtoR(txt, 
                                           XmSTRING_DEFAULT_CHARSET);
           SetAttribute(XmNselectionLabelString, s);
           XmStringFree(s);
         }
         /* Label the apply buton: */

         void LabelApplyButton(char *txt) {
           XmString str = XmStringCreateLtoR(txt,
                                             XmSTRING_DEFAULT_CHARSET);
           SetAttribute(XmNapplyLabelString, str);
           XmStringFree(str);
         }
         /* Set default button: */

         void DefaultToOk() {
           SetAttribute(XmNdefaultButton,
                        okbutton->getid());
         }
         void DefaultToCancel() {
           SetAttribute(XmNdefaultButton,
                        cancelbutton->getid());
         }
         void DefaultToHelp() {
           SetAttribute(XmNdefaultButton,
                        helpbutton->getid());
         }
         void DefaultToApply() {
           SetAttribute(XmNdefaultButton,
                        applybutton->getid());
         }
       };
/*
** Prompt dialog - This dialog consists of a single line text widget and
**                 associated label string.  By default the Apply button
**                 is not managed.
**/

class XMPromptDialog : public XMSelection
       {
       protected:
         void GetButtons() {
           Widget w;
           w = XmSelectionBoxGetChild(id, XmDIALOG_HELP_BUTTON);
           helpbutton = new XMPushButton(w);

           w = XmSelectionBoxGetChild(id, XmDIALOG_CANCEL_BUTTON);
           cancelbutton = new XMPushButton(w);

           w = XmSelectionBoxGetChild(id, XmDIALOG_APPLY_BUTTON);
           applybutton = new XMPushButton(w);

           w = XmSelectionBoxGetChild(id, XmDIALOG_OK_BUTTON);
           okbutton = new XMPushButton(w);
         }
       public:
         XMPromptDialog(char *n, Widget parent, char *prompt = NULL,
                        void (*cb)(XMWidget *,
                                   XtPointer, XtPointer) = NULL,
                        XtPointer cbd = NULL,
                        ArgList list = NULL, Cardinal argcount = 0) :
                          XMSelection(n) {
            id = XmCreatePromptDialog(parent, name,
                                      list, argcount);
            GetButtons();
            if(prompt) SetLabelString(prompt);
            helpbutton->Disable();
            if(cb) AddDoCallback(cb, cbd);
            Manage();
            XtPopup(XtParent(id), XtGrabNone);
          }
         XMPromptDialog(char *n, XMWidget &parent, char *prompt = NULL,
                         void (*cb)(XMWidget *,
                                    XtPointer, XtPointer) = NULL,
                         XtPointer cbd = NULL,
                         ArgList list = NULL, Cardinal argcount = 0) :
                           XMSelection(n) {
                   id = XmCreatePromptDialog(parent.getid(),
                                             name, list, argcount);
                   GetButtons();
                   if(prompt) SetLabelString(prompt);
                   if(cb) AddDoCallback(cb, cbd);
                   helpbutton->Disable();
                   Manage();
                   XtPopup(XtParent(id), XtGrabNone);
                 }
         XMPromptDialog(Widget w) : XMSelection(w) { }

                          
       };
/*
** XMPrompter specializes XMPromptDialog to encapsulate the behavior of
** the Action area of the dialog as follows:
**    Ok    - Perform virtual function is called and if it returns
**            True then the box is unmanaged.
**    Apply - Perform virtual function is called.
**    Cancel- Box is unmanaged.
**    Help  - Help text is displayed... Either the text last 
**            set via Set Help Text or a default help text which describes
**            in general terms how to use a prompter dialog.
*/
class XMPrompter : public XMPromptDialog {
 public:
  XMPrompter(char *name, Widget parent, char *prompt = NULL,
             XtPointer calldata = NULL);
  XMPrompter(char *name, XMWidget &parent, char *prompt = NULL,
             XtPointer calldata = NULL);
  ~XMPrompter();


  void SetHelpText(char **new_help);
  void RevertHelpText();
 protected:
  XMCallback<XMPrompter> ok;
  XMCallback<XMPrompter> apply;
  XMCallback<XMPrompter> cancel;
  XMCallback<XMPrompter> help;
 private:
  virtual void OkCallback(XMWidget *wid, XtPointer userd, XtPointer calld);
  virtual void ApplyCallback(XMWidget *wid, XtPointer userd, XtPointer calld);
  virtual void CancelCallback(XMWidget *wid, XtPointer userd, XtPointer calld);
  virtual void HelpCallback(XMWidget *wid, XtPointer userd, XtPointer calld);
  virtual Boolean Perform(XMWidget *wid, XtPointer userd, XtPointer calld);

  struct XM_help_client_data help_info;
};
/*
** A selection dialog has a list of alternatives to choose from.
** The list can be scrolled around and either picked from with the mouse
** or typed in to a text widget.
*/
class XMSelectionDialog : public XMSelection
      {
      public:
         XMSelectionDialog(char *n, Widget parent, char *prompt = NULL,
                        void (*cb)(XMWidget *,
                                   XtPointer, XtPointer) = NULL,
                        XtPointer cbd = NULL,
                        ArgList list = NULL, Cardinal argcount = 0) :
                          XMSelection(n) {
            id = XmCreateSelectionDialog(parent, name,
                                      list, argcount);
            GetButtons();
            if(prompt) SetLabelString(prompt);
            helpbutton->Disable();
            if(cb) AddDoCallback(cb, cbd);
            Manage();
            XtPopup(XtParent(id), XtGrabNone);
          }
         XMSelectionDialog(char *n, XMWidget &parent, char *prompt = NULL,
                         void (*cb)(XMWidget *,
                                    XtPointer, XtPointer) = NULL,
                         XtPointer cbd = NULL,
                         ArgList list = NULL, Cardinal argcount = 0) :
                           XMSelection(n) {
                   id = XmCreateSelectionDialog(parent.getid(),
                                             name, list, argcount);
                   GetButtons();
                   if(prompt) SetLabelString(prompt);
                   if(cb) AddDoCallback(cb, cbd);
                   helpbutton->Disable();
                   Manage();
                   XtPopup(XtParent(id), XtGrabNone);
                 }
         XMSelectionDialog(Widget w) : XMSelection(w) { }

         /*
         ** Selection boxes also need a method to set the list... it can be
         ** set in the argument list, but the following is more convenient
         */

         void SetSelectionList(Cardinal list_count, char **selections);
         void SetVisibleItemCount(Cardinal num_visible) {
           SetAttribute(XmNvisibleItemCount, num_visible);
         }

         /*
         ** Selection boxes are allowed to restrict choices to items on the
         ** list.  This gives them an additional callback (XmNnoMatchCallback).
         */

         void RestrictChoices() {
           SetAttribute(XmNmustMatch, True);
         }
         void NoRestrictChoices() {
           SetAttribute(XmNmustMatch, (XtArgVal)False);
         }
         Callback_data *AddNoMatchCallback(void (*cb)(XMWidget *,
                                            XtPointer, XtPointer),
                                 XtPointer client_data = NULL) {
           return AddCallback(XmNnoMatchCallback, cb, client_data);
         }
           
       };

/*
** XMSelector:  This class is a self contained version of XMSelectionDialog
**              Self contained means that the class contains methods to
**              respond to the callbacks as well as some additional
**              virtual functions intended to be superceded when the
**              user actually makes use of this class.  The class is not
**              intended to be typically used, Usually, the client will
**              specialize the class, supplying overrides for one or more
**              of the methods:
**                   SetUpList     - Defines the set of items in the list.
**                   Perform       - Application sensitive processing of
**                                   the Ok or Apply buttons.
**                   Constructors/Destructors.
*/
class XMSelector : public XMSelectionDialog
{
  public:
     XMSelector(char *n, Widget parent, char *prompt = NULL,
                XtPointer cbd = NULL,
                ArgList list = NULL, Cardinal argcount = 0);
     XMSelector(char *n, XMWidget &parent, char *prompt = NULL,
                XtPointer cbd = NULL,
                ArgList list = NULL, Cardinal argcount = 0);
     ~XMSelector();

     virtual void SetupList();          /* Set up the selectionlist. */
     void         SetHelpText(char **text);
     void         RevertHelpText();
   protected:
     virtual Boolean Perform(XMWidget *wid, XtPointer cd,
                          int reason, XmString value, int size);
     virtual void OkCb(XMWidget *wid, XtPointer cd, XtPointer ud);
     virtual void NoMatchCb(XMWidget *wid, XtPointer cd, XtPointer ud);
     virtual void ApplyCb(XMWidget *wid, XtPointer cd, XtPointer ud);
     virtual void CancelCb(XMWidget *wid, XtPointer cd, XtPointer ud);
     virtual void HelpCb(XMWidget *wid, XtPointer cd, XtPointer ud);
  private:
     XMCallback<XMSelector> okbuttonCB;
     XMCallback<XMSelector> applybuttonCB;
     XMCallback<XMSelector> cancelbuttonCB;
     XMCallback<XMSelector> helpbuttonCB;
     XMCallback<XMSelector> nomatchCB;

     struct XM_help_client_data helpinfo;
 
};
/*
** A file selection dialog is a pair of list boxes.  One selects/displays
** the directories.  Another displays the list of files present in that 
** directory.  There are two text entry areas.  The top one allows the user
** to set a file directory/search mask.  The bottom one allows the user to
** enter filenames directly.  The following buttons are available by default:
**  Ok, Apply, Cancel.  Help is present but default ghosted.
*/
class XMFileListDialog : public XMSelection
       {
       protected:
         void GetButtons() {
           helpbutton = new 
             XMPushButton(XmFileSelectionBoxGetChild(id,
                                                     XmDIALOG_HELP_BUTTON));
           cancelbutton = new
             XMPushButton(XmFileSelectionBoxGetChild(id,
                                                     XmDIALOG_CANCEL_BUTTON));
           okbutton = new
             XMPushButton(XmFileSelectionBoxGetChild(id,
                                                     XmDIALOG_OK_BUTTON));
           applybutton = new
             XMPushButton(XmFileSelectionBoxGetChild(id,
                                                     XmDIALOG_APPLY_BUTTON));
         }
                                                                    
       public:
         XMFileListDialog(char *n, Widget parent, char 
                          *directory = XMFILE_DEFAULT_DIRMASK,
                        void (*cb)(XMWidget *,
                                   XtPointer, XtPointer) = NULL,
                        XtPointer cbd = NULL,
                        ArgList list = NULL, Cardinal argcount = 0) :
                          XMSelection(n) {
            id = XmCreateFileSelectionDialog(parent, name,
                                      list, argcount);
            GetButtons();
            helpbutton->Disable();
            SetLabelString("Filename: ");
            if(cb) AddDoCallback(cb, cbd);

            /* Set the search path directory: */

            DoSearch(directory);
            Manage();
            XtPopup(XtParent(id), XtGrabNone);
          }
         XMFileListDialog(char *n, XMWidget &parent, 
                          char *directory = XMFILE_DEFAULT_DIRMASK,
                         void (*cb)(XMWidget *,
                                    XtPointer, XtPointer) = NULL,
                         XtPointer cbd = NULL,
                         ArgList list = NULL, Cardinal argcount = 0) :
                           XMSelection(n) {
                   id = XmCreateFileSelectionDialog(parent.getid(),
                                                    name, list, argcount);
                   GetButtons();
                   DoSearch(directory);
                   if(cb) AddDoCallback(cb, cbd);
                   helpbutton->Disable();
                   SetLabelString("Filename: ");
                   Manage();
                   XtPopup(XtParent(id), XtGrabNone);
                 }
         XMFileListDialog(Widget w) : XMSelection(w) { }

         /* Methods which manipulate the search strings: */
         void DoSearch(XmString dir) {
           XmFileSelectionDoSearch(id, dir);
         }
         void DoSearch(char *dir) {
           XmString d;
           d = XmStringCreateLtoR(dir, XmSTRING_DEFAULT_CHARSET);
           XmFileSelectionDoSearch(id, d);
           XmStringFree(d);
         }
         void DoSearch() {      /* Do search on current mask. */
           XmString dirmask;    /* Will hold the directory search mask. */
           GetAttribute(XmNdirMask, &dirmask);

           XmFileSelectionDoSearch(id, dirmask);
           XmStringFree(dirmask); /* Get rid of dirmask. */
         }

         char *GetDirectory();
         char *GetFileMask();
         char *GetFullSearchString();

         /* Methods to manipulate the labels: */

         virtual void SetLabelString(char *txt) {
           XmString s = XmStringCreateLtoR(txt, XmSTRING_DEFAULT_CHARSET);
           XtVaSetValues(XmFileSelectionBoxGetChild(id, 
                                                    XmDIALOG_SELECTION_LABEL),
                         XmNlabelString, s,
                         NULL);
           XmStringFree(s);
         }
         virtual void SetFilterString(char *txt) {
           XmString s = XmStringCreateLtoR(txt, XmSTRING_DEFAULT_CHARSET);
           SetAttribute(XmNfilterLabelString, s);
           XmStringFree(s);
         }
         /* Set restrictions on the file types searched: */

         void SetFileTypes(unsigned char fileset) {
           SetAttribute(XmNfileTypeMask, fileset);
         }
         void RestrictChoices() {
           SetAttribute(XmNmustMatch, True);
         }
         void NoRestrictChoices() {
           SetAttribute(XmNmustMatch, (XtArgVal)False);
         }

         /* Add callbacks if no match on filename selected */

         Callback_data *AddNoMatchCallback(void (*cb)(XMWidget *,
                                            XtPointer, XtPointer),
                                 XtPointer client_data = NULL) {
           return AddCallback(XmNnoMatchCallback, cb, client_data);
         }
         
       };
/*
**  The XMFileSelector Dialog is a self contained version of the 
**  XMFileListDialog.  Self contained, in this case means that the
**  callback functions are redirected to method functions and that
**  the method functions are virtualized to allow descendent application
**  specific instances of these classes to be constructed.
**  The strategy used for virtualizing is similar to that taken by
**  the XMSelector class.  Individual callbacks can be overridden by the
**  user to supply ok, filter, cancel and help callbacks, however,
**  the Ok callback calls the Perform function with the filename string
**  as an argument and in most cases that's all that the client will need
**  to override (as well as supplying constructors and desctructors.
*/
class XMFileSelector : public XMFileListDialog
{
  public:
    XMFileSelector(char *n, Widget parent, 
                   XtPointer calld = NULL,
                   char *directory = XMFILE_DEFAULT_DIRMASK);

    XMFileSelector(char *n, XMWidget &parent, 
                   XtPointer ud = NULL,
                   char *directory = XMFILE_DEFAULT_DIRMASK);


    ~XMFileSelector();
                   
    void SetHelpText(char **text);
    void RevertHelpText();
  protected:
    virtual Boolean Perform(XMWidget *wid, XtPointer ud,
                            char *filename,
                            int reason);
    virtual void OkCb(XMWidget *wid, XtPointer ud, XtPointer cd);
    virtual void NomatchCb(XMWidget *wid, XtPointer ud, XtPointer cd);
    virtual void FilterCb(XMWidget *wid, XtPointer ud, XtPointer cd);
    virtual void CancelCb(XMWidget *wid, XtPointer ud, XtPointer cd);
    virtual void HelpCb(XMWidget *wid, XtPointer ud, XtPointer cd);
                         

  private:
    XMCallback<XMFileSelector> okcb;
    XMCallback<XMFileSelector> nomatchcb;
    XMCallback<XMFileSelector> filtercb;
    XMCallback<XMFileSelector> cancelcb;
    XMCallback<XMFileSelector> helpcb;

    struct XM_help_client_data helpinfo;
};

/*
** The  XMCustomDialog class is a useful subclass for building basic
** Customized dialogs.  It is implemented as follows:
**    A dialog shell is created which contains a paned window as a manger
**    child.  The paned window manages two widgets.  A form called
**    work_area which is where the user should lay out the work area of
**    the form and a row_column widget called action_area which contains
**    the action area buttons.
** The idea is that clients will specialize constructors and other methods
** to build up, maintain and process the work_area subwidgets.
** Action area buttons are:
**     OK  - when pressed, the Do call back is initiated.
** Accept  -  When pressed, the Do callback is initiated.
** Cancel  -  When pressed, the Cancel callback is initiated.
** Help    - When pressed, the Help callback is initiated.
*/

class XMCustomDialog : public XMWidget /* Create unmanaged for greater layout ctl. */
{
 protected:
  XMForm        *shell_child;   /* Form present to allow modalization */
  XMPanedWindow *top_manager;   /* Top level manager widget. */
  XMRowColumn   *action_area;   /* The action area widget. */
  XMForm        *work_area;     /* The form which manages the work area */
  XMPushButton  *Ok;            /* Buttons in the action area. */
  XMPushButton  *Apply;
  XMPushButton  *Cancel;
  XMPushButton  *Help;
  void CreateDialog(char *name, Widget parent, char *title,
                    ArgList l, Cardinal num_args);
 public:
  /* Constructors: */

  XMCustomDialog(char *name, XMWidget &parent, char *title,
                 ArgList l = NULL, Cardinal num_args = 0) : 
                   XMWidget(name) { 
                     CreateDialog(name, parent.getid(), title, 
                                  l, num_args);
                   }
  XMCustomDialog(char *name, Widget parent, char *title,
                 ArgList l = NULL, Cardinal num_args = 0) :
                   XMWidget(name) {
                     CreateDialog(name, parent, title, l, num_args); }

  /* Destructors:  */

  ~XMCustomDialog() {
    delete Ok;
    delete Apply;
    delete Cancel;
    delete Help;
    delete action_area;
    delete work_area;
    delete top_manager;
    delete shell_child;
  }

  /* Operation on the skeleton dialog */

  void Manage();
  void UnManage();

  XMPanedWindow *TopManager() { return top_manager; }
  XMRowColumn   *ActionArea() { return action_area; }
  XMForm        *WorkArea()   { return work_area;   }
  XMPushButton  *ok()          { return Ok;          }
  XMPushButton  *apply()       { return Apply;       }
  XMPushButton  *cancel()      { return Cancel;      }
  XMPushButton  *help()        { return Help;        }

  Callback_data *AddDoCallback(void (*callback)(XMWidget *, XtPointer, XtPointer),
                     XtPointer user_data = NULL,
                     Callback_data **okcb = NULL) 
    { 
      Callback_data *okc;
      okc = Ok->AddCallback(callback, user_data);
      if(okcb != NULL) *okcb = okc;
      return Apply->AddCallback(callback, user_data);
    }
  Callback_data *AddOkCallback(void (*callback)(XMWidget *, XtPointer, XtPointer),
                     XtPointer user_data = NULL)
    { return Ok->AddCallback(callback, user_data); }
  Callback_data *AddApplyCallback(void (*callback)(XMWidget *, XtPointer, XtPointer),
                        XtPointer user_data = NULL)
    { return Apply->AddCallback(callback, user_data); }
  Callback_data *AddCancelCallback(void (*callback)(XMWidget *, XtPointer, XtPointer),
                     XtPointer user_data = NULL)
    { return Cancel->AddCallback(callback, user_data); }
  Callback_data *AddHelpCallback(void (*callback)(XMWidget *, XtPointer, XtPointer),
                     XtPointer user_data = NULL)
    { return Help->AddCallback(callback, user_data); }

  void SetModal(unsigned char modality)
    { shell_child->SetAttribute(XmNdialogStyle, modality); }

};
/*
** Base class for a custom dialog box.
*/
class XMCustomDialogBox : public XMCustomDialog
{
 public:
  XMCustomDialogBox(char *name, XMWidget &parent, char *title,
                    ArgList l= NULL, Cardinal num_args=0);
  XMCustomDialogBox(char *name, Widget parent, char *title,
                    ArgList l=NULL, Cardinal num_args=0);
  ~XMCustomDialogBox();


  void SetHelpText(char **help_text);
  void RevertHelpText();

 protected:
  XMCallback<XMCustomDialogBox>   OkCb;
  XMCallback<XMCustomDialogBox>   ApplyCb;
  XMCallback<XMCustomDialogBox>   CancelCb;
  XMCallback<XMCustomDialogBox>   HelpCb;

  virtual Boolean Perform(XMWidget *wid, XtPointer cli, XtPointer call);
  virtual void OkPressed(XMWidget *wid, XtPointer cli, XtPointer call);
  virtual void ApplyPressed(XMWidget *wid, XtPointer cli, XtPointer call);
  virtual void CancelPressed(XMWidget *wid, XtPointer cli, XtPointer call);
  virtual void HelpPressed(XMWidget *wid, XtPointer cli, XtPointer call);
  
 private:
  void InitializeHelp();
  void SetCallbacks();          /* Used by all constructors. */
  XM_help_client_data help_info;

};
#endif

---