improved memory liberation (explicitly set to NULL after delete)

[wxWidgets.git] / src / mac / spinbutt.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        spinbutt.cpp
// Purpose:     wxSpinButton
// Author:      AUTHOR
// Modified by:
// Created:     ??/??/98
// RCS-ID:      $Id$
// Copyright:   (c) AUTHOR
// Licence:   	wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "spinbutt.h"
#pragma implementation "spinbuttbase.h"
#endif

#include "wx/spinbutt.h"
#include "wx/mac/uma.h"

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// wxWin macros
// ----------------------------------------------------------------------------

#if !USE_SHARED_LIBRARY
    IMPLEMENT_DYNAMIC_CLASS(wxSpinButton, wxControl)
    IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxScrollEvent)
#endif

wxSpinButton::wxSpinButton()
   : wxSpinButtonBase()
{
}

bool wxSpinButton::Create(wxWindow *parent, wxWindowID id, const wxPoint& pos, const wxSize& size,
            long style, const wxString& name)
{
    m_min = 0;
    m_max = 100;

  if (!parent)
      return FALSE;
    
	Rect bounds ;
	Str255 title ;
	
	MacPreControlCreate( parent , id ,  "" , pos , size ,style,*( (wxValidator*) NULL ) , name , &bounds , title ) ;

	m_macControl = ::NewControl( MAC_WXHWND(parent->MacGetRootWindow()) , &bounds , title , false , 0 , 0 , 100, 
		kControlLittleArrowsProc , (long) this ) ;
	
	wxASSERT_MSG( (ControlHandle) m_macControl != NULL , "No valid mac control" ) ;

	MacPostControlCreate() ;

  return TRUE;
}

wxSpinButton::~wxSpinButton()
{
}

// Attributes
////////////////////////////////////////////////////////////////////////////

int wxSpinButton::GetMin() const
{
   return m_min;
}

int wxSpinButton::GetMax() const
{
   return m_max;
}

int wxSpinButton::GetValue() const
{
    return m_value;
}

void wxSpinButton::SetValue(int val)
{
	m_value = val ;
}

void wxSpinButton::SetRange(int minVal, int maxVal)
{
	m_min = minVal;
	m_max = maxVal;
    SetControlMaximum( (ControlHandle) m_macControl , maxVal ) ;
    SetControlMinimum((ControlHandle) m_macControl , minVal ) ;
}

void wxSpinButton::MacHandleValueChanged( int inc )
{
     
    wxEventType scrollEvent = wxEVT_NULL;
	int oldValue = m_value ;

    m_value = oldValue + inc;

    if (m_value < m_min)
    {
    if ( m_windowStyle & wxSP_WRAP )
      m_value = m_max;
    else
      m_value = m_min;
    }

    if (m_value > m_max)
    {
    if ( m_windowStyle & wxSP_WRAP )
      m_value = m_min;
    else
      m_value = m_max;
    }

    if ( m_value - oldValue == -1 )
        scrollEvent = wxEVT_SCROLL_LINEDOWN ;
    else if ( m_value - oldValue == 1 )
        scrollEvent = wxEVT_SCROLL_LINEUP ;
    else
        scrollEvent = wxEVT_SCROLL_THUMBTRACK ;
        
    wxSpinEvent event(scrollEvent, m_windowId);

    event.SetPosition(m_value);
    event.SetEventObject( this );
    if ((GetEventHandler()->ProcessEvent( event )) &&
        !event.IsAllowed() )
    {
        m_value = oldValue ;
    }
    SetControlValue( (ControlHandle) m_macControl , m_value ) ;

    /* always send a thumbtrack event */
    if (scrollEvent != wxEVT_SCROLL_THUMBTRACK)
    {
        scrollEvent = wxEVT_SCROLL_THUMBTRACK;
        wxSpinEvent event2( scrollEvent, GetId());
        event2.SetPosition( m_value );
        event2.SetEventObject( this );
        GetEventHandler()->ProcessEvent( event2 );
    }
}

void wxSpinButton::MacHandleControlClick( WXWidget control , wxInt16 controlpart ) 
{
	if ( (ControlHandle) m_macControl == NULL )
		return ;
	
  int nScrollInc = 0;

	switch( controlpart )
	{
		case kControlUpButtonPart :
            nScrollInc = 1;
			break ;
		case kControlDownButtonPart :
            nScrollInc = -1;
			break ;
	}
	MacHandleValueChanged( nScrollInc ) ;

}

// ----------------------------------------------------------------------------
// size calculation
// ----------------------------------------------------------------------------

wxSize wxSpinButton::DoGetBestSize() const
{
  return wxSize(16,24);
}