don't crash when trying to dump struct members which are NULL pointers

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

/////////////////////////////////////////////////////////////////////////////
// Name:        msw/spinbutt.cpp
// Purpose:     wxSpinButton
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// ============================================================================
// declarations
// ============================================================================

// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
    #pragma implementation "spinbutt.h"
    #pragma implementation "spinbutbase.h"
#endif

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#ifndef WX_PRECOMP
#include "wx/app.h"
#endif

#if wxUSE_SPINBTN

#include "wx/spinbutt.h"

IMPLEMENT_DYNAMIC_CLASS(wxSpinEvent, wxNotifyEvent)

#include "wx/msw/private.h"
#include "wx/msw/wrapcctl.h"

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

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


#if wxUSE_EXTENDED_RTTI
WX_DEFINE_FLAGS( wxSpinButtonStyle )

wxBEGIN_FLAGS( wxSpinButtonStyle )
    // new style border flags, we put them first to
    // use them for streaming out
    wxFLAGS_MEMBER(wxBORDER_SIMPLE)
    wxFLAGS_MEMBER(wxBORDER_SUNKEN)
    wxFLAGS_MEMBER(wxBORDER_DOUBLE)
    wxFLAGS_MEMBER(wxBORDER_RAISED)
    wxFLAGS_MEMBER(wxBORDER_STATIC)
    wxFLAGS_MEMBER(wxBORDER_NONE)

    // old style border flags
    wxFLAGS_MEMBER(wxSIMPLE_BORDER)
    wxFLAGS_MEMBER(wxSUNKEN_BORDER)
    wxFLAGS_MEMBER(wxDOUBLE_BORDER)
    wxFLAGS_MEMBER(wxRAISED_BORDER)
    wxFLAGS_MEMBER(wxSTATIC_BORDER)
    wxFLAGS_MEMBER(wxBORDER)

    // standard window styles
    wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
    wxFLAGS_MEMBER(wxCLIP_CHILDREN)
    wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
    wxFLAGS_MEMBER(wxWANTS_CHARS)
    wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
    wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
    wxFLAGS_MEMBER(wxVSCROLL)
    wxFLAGS_MEMBER(wxHSCROLL)

    wxFLAGS_MEMBER(wxSP_HORIZONTAL)
    wxFLAGS_MEMBER(wxSP_VERTICAL)
    wxFLAGS_MEMBER(wxSP_ARROW_KEYS)
    wxFLAGS_MEMBER(wxSP_WRAP)

wxEND_FLAGS( wxSpinButtonStyle )

IMPLEMENT_DYNAMIC_CLASS_XTI(wxSpinButton, wxControl,"wx/spinbut.h")

wxBEGIN_PROPERTIES_TABLE(wxSpinButton)
    wxEVENT_RANGE_PROPERTY( Spin , wxEVT_SCROLL_TOP , wxEVT_SCROLL_ENDSCROLL , wxSpinEvent )

    wxPROPERTY( Value , int , SetValue, GetValue, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY( Min , int , SetMin, GetMin, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY( Max , int , SetMax, GetMax, 0 , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
    wxPROPERTY_FLAGS( WindowStyle , wxSpinButtonStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
wxEND_PROPERTIES_TABLE()

wxBEGIN_HANDLERS_TABLE(wxSpinButton)
wxEND_HANDLERS_TABLE()

wxCONSTRUCTOR_5( wxSpinButton , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size , long , WindowStyle )
#else
IMPLEMENT_DYNAMIC_CLASS(wxSpinButton, wxControl)
#endif



// ----------------------------------------------------------------------------
// wxSpinButton
// ----------------------------------------------------------------------------

bool wxSpinButton::Create(wxWindow *parent,
                          wxWindowID id,
                          const wxPoint& pos,
                          const wxSize& size,
                          long style,
                          const wxString& name)
{
    // basic initialization
    m_windowId = (id == wxID_ANY) ? NewControlId() : id;

    SetName(name);

    int x = pos.x;
    int y = pos.y;
    int width = size.x;
    int height = size.y;

    m_windowStyle = style;

    SetParent(parent);

    // get the right size for the control
    if ( width <= 0 || height <= 0 )
    {
        wxSize size = DoGetBestSize();
        if ( width <= 0 )
            width = size.x;
        if ( height <= 0 )
            height = size.y;
    }

    if ( x < 0 )
        x = 0;
    if ( y < 0 )
        y = 0;

    // translate the styles
    DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_TABSTOP | /*  WS_CLIPSIBLINGS | */
                   UDS_NOTHOUSANDS | // never useful, sometimes harmful
                   UDS_SETBUDDYINT;  // it doesn't harm if we don't have buddy

    if ( m_windowStyle & wxCLIP_SIBLINGS )
        wstyle |= WS_CLIPSIBLINGS;
    if ( m_windowStyle & wxSP_HORIZONTAL )
        wstyle |= UDS_HORZ;
    if ( m_windowStyle & wxSP_ARROW_KEYS )
        wstyle |= UDS_ARROWKEYS;
    if ( m_windowStyle & wxSP_WRAP )
        wstyle |= UDS_WRAP;

    // create the UpDown control.
    m_hWnd = (WXHWND)CreateUpDownControl
                     (
                       wstyle,
                       x, y, width, height,
                       GetHwndOf(parent),
                       m_windowId,
                       wxGetInstance(),
                       NULL, // no buddy
                       m_max, m_min,
                       m_min // initial position
                     );

    if ( !m_hWnd )
    {
        wxLogLastError(wxT("CreateUpDownControl"));

        return false;
    }

    if ( parent )
    {
        parent->AddChild(this);
    }

    SubclassWin(m_hWnd);

    SetBestSize(size);

    return true;
}

wxSpinButton::~wxSpinButton()
{
}

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

wxSize wxSpinButton::DoGetBestSize() const
{
    return GetBestSpinnerSize( (GetWindowStyle() & wxSP_VERTICAL) != 0 );
}

// ----------------------------------------------------------------------------
// Attributes
// ----------------------------------------------------------------------------

int wxSpinButton::GetValue() const
{
    int n;
#ifdef UDM_GETPOS32
    if ( wxTheApp->GetComCtl32Version() >= 580 )
    {
        // use the full 32 bit range if available
        n = ::SendMessage(GetHwnd(), UDM_GETPOS32, 0, 0);
    }
    else
#endif // UDM_GETPOS32
    {
        // we're limited to 16 bit
        n = (short)LOWORD(::SendMessage(GetHwnd(), UDM_GETPOS, 0, 0));
    }

    if (n < m_min) n = m_min;
    if (n > m_max) n = m_max;

    return n;
}

void wxSpinButton::SetValue(int val)
{
    // wxSpinButtonBase::SetValue(val); -- no, it is pure virtual

#ifdef UDM_SETPOS32
    if ( wxTheApp->GetComCtl32Version() >= 580 )
    {
        // use the full 32 bit range if available
        ::SendMessage(GetHwnd(), UDM_SETPOS32, 0, val);
    }
    else // we're limited to 16 bit
#endif // UDM_SETPOS32
    {
        ::SendMessage(GetHwnd(), UDM_SETPOS, 0, MAKELONG((short) val, 0));
    }
}

void wxSpinButton::SetRange(int minVal, int maxVal)
{
    wxSpinButtonBase::SetRange(minVal, maxVal);

#ifdef UDM_SETRANGE32
    if ( wxTheApp->GetComCtl32Version() >= 471 )
    {
        // use the full 32 bit range if available
        ::SendMessage(GetHwnd(), UDM_SETRANGE32, minVal, maxVal);
    }
    else // we're limited to 16 bit
#endif // UDM_SETRANGE32
    {
        ::SendMessage(GetHwnd(), UDM_SETRANGE, 0,
                      (LPARAM) MAKELONG((short)maxVal, (short)minVal));
    }
}

bool wxSpinButton::MSWOnScroll(int WXUNUSED(orientation), WXWORD wParam,
                               WXWORD pos, WXHWND control)
{
    wxCHECK_MSG( control, false, wxT("scrolling what?") )

    if ( wParam != SB_THUMBPOSITION )
    {
        // probable SB_ENDSCROLL - we don't react to it
        return false;
    }

    wxSpinEvent event(wxEVT_SCROLL_THUMBTRACK, m_windowId);
    event.SetPosition((short)pos);    // cast is important for negative values!
    event.SetEventObject(this);

    return GetEventHandler()->ProcessEvent(event);
}

bool wxSpinButton::MSWOnNotify(int WXUNUSED(idCtrl), WXLPARAM lParam, WXLPARAM *result)
{
    NM_UPDOWN *lpnmud = (NM_UPDOWN *)lParam;

    if (lpnmud->hdr.hwndFrom != GetHwnd()) // make sure it is the right control
        return false;

    wxSpinEvent event(lpnmud->iDelta > 0 ? wxEVT_SCROLL_LINEUP
                                         : wxEVT_SCROLL_LINEDOWN,
                      m_windowId);
    event.SetPosition(lpnmud->iPos + lpnmud->iDelta);
    event.SetEventObject(this);

    bool processed = GetEventHandler()->ProcessEvent(event);

    *result = event.IsAllowed() ? 0 : 1;

    return processed;
}

bool wxSpinButton::MSWCommand(WXUINT WXUNUSED(cmd), WXWORD WXUNUSED(id))
{
    // No command messages
    return false;
}

#endif // wxUSE_SPINBTN