XMPushbutton.h

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*/
/*
** Facility:
**   Xamine MOTIF support for C++
** Abstract:
**   XMPushbutton.h   - This include file defines the PushButton class
**                      as a specialization of the ManagedWidget class.
**                      The Pushbutton widget is intended as a base class
**                      for various AppXXPushbuttons.  It includes:
**                       A method which is called when the button is pushed.
**                       Methods for enabling and disabling the button.
**                       A method for changing the label on the button.
** Author:
**    Ron Fox
**    NSCL
**    Michigan State University
**    East Lansing, MI 48824-1321
** Revision:
**     @(#)XMPushbutton.h       8.1 6/23/95 
*/

#ifndef XMPushbutton_H
#define XMPushbutton_H

#include <Xm/PushB.h>
#include <Xm/CascadeB.h>
#include <Xm/ToggleB.h>
#include <Xm/ArrowB.h>
#include "XMWidget.h"

/*
** XMButton is the base class from which all Motif button types are
** derived.  There is no such thing in Motif however.
*/
class XMButton : public XMManagedWidget
                   {
                   public:
                     /* Turn button on/of. */

                     virtual void Enable()
                       { 
                         SetAttribute(XmNsensitive, (XtArgVal)True); 
                       }
                     virtual void Disable()
                       {
                         SetAttribute(XmNsensitive, (XtArgVal)False); 
                       }

                     /* Set label values... virtual to support button with */
                     /* PIXMAP subtype                                     */

                     virtual void Label(XmString label)
                       {
                         SetAttribute(XmNlabelString, label);
                       }
                     virtual void Label(String label)
                       {
                         XmString s;
                         s = XmStringCreateLtoR(label, 
                                                XmSTRING_DEFAULT_CHARSET);
                         Label(s);
                         XmStringFree(s);
                       }
                     /* Set the button trigger mnemonic: */

                     virtual void SetMnemonic(KeySym k)
                       {
                         SetAttribute(XmNmnemonic, k);
                       }

                     /* Constructors: */

                     XMButton(char *n, WidgetClass c, Widget parent)
                       : XMManagedWidget(n, c, parent)
                         {}
                     XMButton(char *n, WidgetClass c, XMWidget &parent)
                       : XMManagedWidget(n, c, parent)
                         {}
                     XMButton(Widget w) : XMManagedWidget(w)
                       {}

                     void SetAccelerator(char *translation, char *prompt)
                       {
                         XmString acctext = XmStringCreateSimple(prompt);
                         XtVaSetValues(id,
                                       XmNaccelerator, translation,
                                       XmNacceleratorText, acctext,
                                       NULL);
                         XmStringFree(acctext);
                       }
                   };

/*
** The push button class is an ordinary push button to activate a function
*/
class XMPushButton : public XMButton
                   {
                   public:
                     /* Constructors... make the widget */

                     XMPushButton(char *n, Widget parent, 
                                  void (*cb)(XMWidget *, XtPointer, XtPointer)
                                  = NULL,
                                  XtPointer cd = NULL):
                       XMButton(n, xmPushButtonWidgetClass, parent)
                       {
                         Enable();
                         if(cb)
                           XMWidget::AddCallback(XmNactivateCallback, cb, cd);
                       }
                     XMPushButton(char *n, XMWidget &parent, 
                                  void (*cb)(XMWidget *, XtPointer, XtPointer)
                                  = NULL,
                                  XtPointer cd=NULL):
                              XMButton(n, xmPushButtonWidgetClass, parent)
                       {
                         Enable();
                         if(cb)
                           XMWidget::AddCallback(XmNactivateCallback, cb, cd);
                       }
                     XMPushButton(Widget w) : XMButton(w) {}
                     /* Add additional call backs: */
                   
                     Callback_data *AddCallback(void (*cb)(XMWidget *, 
                                            XtPointer, 
                                            XtPointer) = NULL,
                                 XtPointer cd = NULL)
                       { return XMWidget::AddCallback(XmNactivateCallback, cb, cd); }
                      
                   };

/* This derivation of Cascade button supports pull right menuing via
** additional methods.
*/

class XMCascadeButton : public XMButton
                   {
                   public:
                     /* Describe associated cascaded menus: */
                     
                     void SetAssociatedMenu(XMWidget &w)
                       {
                         SetAttribute(XmNsubMenuId, w.getid());
                       }
                     void SetAssociatedMenu(Widget w)
                       {
                         SetAttribute(XmNsubMenuId, w);
                       }
                     
                     /* Set the keystroke  trigger mnemonic */

             
                     /* Constructors... make the widget */

                     XMCascadeButton(char *n, Widget parent, 
                                  void (*cb)(XMWidget *, XtPointer, XtPointer)
                                  = NULL,
                                  XtPointer cd = NULL):
                       XMButton(n, xmCascadeButtonWidgetClass, parent)
                       {
                         Enable();
                         if(cb)
                           XMWidget::AddCallback(XmNactivateCallback, cb, cd);
                       }
                     XMCascadeButton(char *n, XMWidget &parent, 
                                  void (*cb)(XMWidget *, XtPointer, XtPointer)
                                  = NULL,
                                  XtPointer cd=NULL):
                       XMButton(n, xmCascadeButtonWidgetClass, parent)
                       {
                         Enable();
                         if(cb)
                           XMWidget::AddCallback(XmNactivateCallback, cb, cd);
                       }
                     XMCascadeButton(Widget w) : XMButton(w) {}
                    
                     /* Add additional call backs: */
                   
                     Callback_data *AddCallback(void (*cb)(XMWidget *, 
                                            XtPointer, 
                                            XtPointer) = NULL,
                                 XtPointer cd = NULL)
                       { return XMWidget::AddCallback(XmNactivateCallback, 
                                                      cb, cd); }

                   };
/*
** A toggle button includes an ON/OFF indicator.
*/
class XMToggleButton: public XMButton
                    {
                    public:
                      /* Constructors: */

                      XMToggleButton(char *n, Widget parent,
                           void (*cb)(XMWidget *, XtPointer, XtPointer) = NULL,
                                     XtPointer cd = NULL) :
                          XMButton(n, xmToggleButtonWidgetClass, parent)
                       {
                         Enable();
                         if(cb)
                           XMWidget::AddCallback(XmNvalueChangedCallback, 
                                                 cb, cd);
                       }
                      XMToggleButton(char *n, XMWidget &parent,
                           void (*cb)(XMWidget *, XtPointer, XtPointer) = NULL,
                                     XtPointer cd = NULL) :
                          XMButton(n, xmToggleButtonWidgetClass, parent)
                       {
                         Enable();
                         if(cb)
                           XMWidget::AddCallback(XmNvalueChangedCallback, cb, cd);
                       }
                      XMToggleButton(Widget w) : XMButton(w) {}

                        /* Specialized toggle button methods */

                    
                     /* Add additional call backs: */
                   
                      Callback_data *AddCallback(void (*cb)(XMWidget *, 
                                            XtPointer, 
                                            XtPointer) = NULL,
                                 XtPointer cd = NULL)
                        { return XMWidget::AddCallback(XmNvalueChangedCallback,
                                                       cb, cd); }

                      void ShowIndicator() /* Display the toggle */
                        { SetAttribute(XmNindicatorOn, (XtArgVal)True); }
                      void HideIndicator() /* Hide the toggle */
                        { SetAttribute(XmNindicatorOn, (XtArgVal)False); }
                      void Diamond()      /* Set indicator to diamond */
                        { SetAttribute(XmNindicatorType, 
                                       (XtArgVal)XmONE_OF_MANY); }
                      void Box() /* Set toggle indicator to box. */
                        { SetAttribute(XmNindicatorType,
                                       (XtArgVal)XmN_OF_MANY);   }

                      void SetState(Boolean state) 
                        { SetAttribute(XmNset, state); }
                      void Set()          /* Set toggle to true. */
                        { SetAttribute(XmNset, (XtArgVal)True);}
                      void UnSet()        /* Set toggle to false */
                        { SetAttribute(XmNset, (XtArgVal)False); }
                      Boolean GetState()  /* Get toggle state */
                        { Boolean value;
                          GetAttribute(XmNset, &value);
                          return value;
                        }
                    };

/*
** An arrow button is a button with an arrow that points left right up or down
** The arrow is the only label allowed so we override the labelling functions
** as well as a few other inappropriate functions.
*/
class XMArrowButton : public XMButton
{
 public:
  /* Constructors/destructors */

  XMArrowButton(char *n, Widget parent, 
                void (*cb)(XMWidget *, XtPointer, XtPointer) = NULL,
                XtPointer cd = NULL) :
                  XMButton(n, xmArrowButtonWidgetClass, parent)
                    {
                      Enable();
                      if(cb) 
                         XMWidget::AddCallback(XmNactivateCallback, cb, cd);
                    }
  XMArrowButton(char *n, XMWidget &parent,
                void (*cb)(XMWidget *, XtPointer, XtPointer) = NULL,
                XtPointer cd = NULL) :
                  XMButton(n, xmArrowButtonWidgetClass, parent)
                    {
                      Enable();
                      if(cb)
                         XMWidget::AddCallback(XmNactivateCallback, cb, cd);

                    }
  /* Additional manipulators: */

  Callback_data *AddCallback(void (*cb)(XMWidget *, XtPointer, XtPointer)=NULL,
                             XtPointer cd = NULL)
    {
      return XMWidget::AddCallback(XmNactivateCallback, cb, cd);
    }
  void PointLeft() {
    SetAttribute(XmNarrowDirection, (XtArgVal)XmARROW_LEFT);
  }
  void PointRight() {
    SetAttribute(XmNarrowDirection, (XtArgVal)XmARROW_RIGHT);
  }
  void PointUp() {
    SetAttribute(XmNarrowDirection, (XtArgVal)XmARROW_UP);
  }
  void PointDown() {
    SetAttribute(XmNarrowDirection, (XtArgVal)XmARROW_DOWN);
  }

  unsigned char Direction() {
    unsigned char dir;

    GetAttribute(XmNarrowDirection, &dir);

    return dir;
  }

  /* Overrides of virtual functions in the base class */

  virtual void Label(XmString label) {}
  virtual void Label(String label)   {}
  virtual void SetMnemonic(KeySym k) {}
};
#endif

---