fixed crash in HitTest() with y position below the last line

[wxWidgets.git] / src / mac / carbon / radiobut.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        radiobut.cpp
// Purpose:     wxRadioButton
// Author:      AUTHOR
// Modified by: JS Lair (99/11/15) adding the cyclic groupe notion for radiobox
// Created:     ??/??/98
// RCS-ID:      $Id$
// Copyright:   (c) AUTHOR
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "radiobut.h"
#endif

#include "wx/defs.h"

#include "wx/radiobut.h"

#if !USE_SHARED_LIBRARY
IMPLEMENT_DYNAMIC_CLASS(wxRadioButton, wxControl)
#endif

#include <wx/mac/uma.h>

bool wxRadioButton::Create(wxWindow *parent, wxWindowID id,
		   const wxString& label,
           const wxPoint& pos,
           const wxSize& size, long style,
           const wxValidator& validator,
           const wxString& name)
{
	Rect bounds ;
	Str255 title ;
	
	MacPreControlCreate( parent , id ,  label , pos , size ,style, validator , name , &bounds , title ) ;

	m_macControl = UMANewControl( parent->GetMacRootWindow() , &bounds , title , false , 0 , 0 , 1, 
	  	kControlRadioButtonProc , (long) this ) ;
	
	MacPostControlCreate() ;

  m_cycle = this ;
  
  if (HasFlag(wxRB_GROUP))
  {
	  AddInCycle( NULL ) ;
  }
  else
  {
    /* search backward for last group start */
    wxRadioButton *chief = (wxRadioButton*) NULL;
    wxWindowList::Node *node = parent->GetChildren().GetLast();
    while (node)
    {
      wxWindow *child = node->GetData();
      if (child->IsKindOf( CLASSINFO( wxRadioButton ) ) )
      {
          chief = (wxRadioButton*) child;
         if (child->HasFlag(wxRB_GROUP)) break;
      }
      node = node->GetPrevious();
    }
    AddInCycle( chief ) ;
  }
    return TRUE;
}

void wxRadioButton::SetValue(bool val)
{
	int i;
	wxRadioButton *cycle;
	  if ( GetControlValue( m_macControl ) == val )
	    return ;
	    
   ::SetControlValue( m_macControl , val ) ;
   if (val) 
   {
   		cycle=this->NextInCycle();
  		if (cycle!=NULL) {
   			while (cycle!=this) {
   				cycle->SetValue(false);
   				cycle=cycle->NextInCycle();
   				}
   			}
   		}
}

bool wxRadioButton::GetValue() const
{
    return ::GetControlValue( m_macControl ) ;
}

void wxRadioButton::Command (wxCommandEvent & event)
{
  SetValue ( (event.GetInt() != 0) );
  ProcessCommand (event);
}

void wxRadioButton::MacHandleControlClick( ControlHandle control , SInt16 controlpart ) 
{
    if ( GetValue() )
      return ;
      
	  wxRadioButton *cycle, *old = NULL ;
    cycle=this->NextInCycle();
    if (cycle!=NULL) {
    	  while (cycle!=this) {
    	    if ( cycle->GetValue() ) {
    	      old = cycle ;
    		    cycle->SetValue(false);
    		  }
    		  cycle=cycle->NextInCycle();
    		}
    }

	  SetValue(true) ;

    if ( old ) {
      wxCommandEvent event(wxEVT_COMMAND_RADIOBUTTON_SELECTED, old->m_windowId );
      event.SetEventObject(old);
      event.SetInt( false );
      old->ProcessCommand(event);
    }
    wxCommandEvent event2(wxEVT_COMMAND_RADIOBUTTON_SELECTED, m_windowId );
    event2.SetEventObject(this);
    event2.SetInt( true );
    ProcessCommand(event2);
}

wxRadioButton *wxRadioButton::AddInCycle(wxRadioButton *cycle)
{
	wxRadioButton *next,*current;
		
	if (cycle==NULL) {
		m_cycle=this;
		return(this);
		}
	else {
		current=cycle;
  		while ((next=current->m_cycle)!=cycle) 
  		  current=current->m_cycle;
	  	m_cycle=cycle;
	  	current->m_cycle=this;
	  	return(cycle);
  	}
}