spinctrl.cpp

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    SetWindowStyle(style);

    WXDWORD exStyle = 0;
    WXDWORD msStyle = MSWGetStyle(GetWindowStyle(), & exStyle) ;

    // calculate the sizes: the size given is the toal size for both controls
    // and we need to fit them both in the given width (height is the same)
    wxSize sizeText(size), sizeBtn(size);
    sizeBtn.x = wxSpinButton::DoGetBestSize().x;
    if ( sizeText.x <= 0 )
    {
        // DEFAULT_ITEM_WIDTH is the default width for the text control
        sizeText.x = DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN + sizeBtn.x;
    }

    sizeText.x -= sizeBtn.x + MARGIN_BETWEEN;
    if ( sizeText.x <= 0 )
    {
        wxLogDebug(_T("not enough space for wxSpinCtrl!"));
    }

    wxPoint posBtn(pos);
    posBtn.x += sizeText.x + MARGIN_BETWEEN;

    // we must create the text control before the spin button for the purpose
    // of the dialog navigation: if there is a static text just before the spin
    // control, activating it by Alt-letter should give focus to the text
    // control, not the spin and the dialog navigation code will give focus to
    // the next control (at Windows level), not the one after it

    // create the text window

    m_hwndBuddy = (WXHWND)::CreateWindowEx
                    (
                     exStyle,                // sunken border
                     _T("EDIT"),             // window class
                     NULL,                   // no window title
                     msStyle,                // style (will be shown later)
                     pos.x, pos.y,           // position
                     0, 0,                   // size (will be set later)
                     GetHwndOf(parent),      // parent
                     (HMENU)-1,              // control id
                     wxGetInstance(),        // app instance
                     NULL                    // unused client data
                    );

    if ( !m_hwndBuddy )
    {
        wxLogLastError(wxT("CreateWindow(buddy text window)"));

        return false;
    }


    // create the spin button
    if ( !wxSpinButton::Create(parent, id, posBtn, sizeBtn, style, name) )
    {
        return false;
    }

    SetRange(min, max);
    SetValue(initial);

    // subclass the text ctrl to be able to intercept some events
    wxSetWindowUserData(GetBuddyHwnd(), this);
    m_wndProcBuddy = (WXFARPROC)wxSetWindowProc(GetBuddyHwnd(),
                                                wxBuddyTextWndProc);

    // set up fonts and colours  (This is nomally done in MSWCreateControl)
    InheritAttributes();
    if (!m_hasFont)
        SetFont(GetDefaultAttributes().font);

    // set the size of the text window - can do it only now, because we
    // couldn't call DoGetBestSize() before as font wasn't set
    if ( sizeText.y <= 0 )
    {
        int cx, cy;
        wxGetCharSize(GetHWND(), &cx, &cy, GetFont());

        sizeText.y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);
    }

    SetBestSize(size);

    (void)::ShowWindow(GetBuddyHwnd(), SW_SHOW);

    // associate the text window with the spin button
    (void)::SendMessage(GetHwnd(), UDM_SETBUDDY, (WPARAM)m_hwndBuddy, 0);

    if ( !value.empty() )
    {
        SetValue(value);
    }

    // do it after finishing with m_hwndBuddy creation to avoid generating
    // initial wxEVT_COMMAND_TEXT_UPDATED message
    ms_allSpins.Add(this);

    return true;
}

wxSpinCtrl::~wxSpinCtrl()
{
    ms_allSpins.Remove(this);

    // This removes spurious memory leak reporting
    if (ms_allSpins.GetCount() == 0)
        ms_allSpins.Clear();

    // destroy the buddy window because this pointer which wxBuddyTextWndProc
    // uses will not soon be valid any more
    ::DestroyWindow(GetBuddyHwnd());
}

// ----------------------------------------------------------------------------
// wxTextCtrl-like methods
// ----------------------------------------------------------------------------

void wxSpinCtrl::SetValue(const wxString& text)
{
    if ( !::SetWindowText(GetBuddyHwnd(), text.c_str()) )
    {
        wxLogLastError(wxT("SetWindowText(buddy)"));
    }
}

int wxSpinCtrl::GetValue() const
{
    wxString val = wxGetWindowText(m_hwndBuddy);

    long n;
    if ( (wxSscanf(val, wxT("%lu"), &n) != 1) )
        n = INT_MIN;

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

    return n;
}

void wxSpinCtrl::SetSelection(long from, long to)
{
    // if from and to are both -1, it means (in wxWidgets) that all text should
    // be selected - translate into Windows convention
    if ( (from == -1) && (to == -1) )
    {
        from = 0;
    }

    ::SendMessage(GetBuddyHwnd(), EM_SETSEL, (WPARAM)from, (LPARAM)to);
}

// ----------------------------------------------------------------------------
// forward some methods to subcontrols
// ----------------------------------------------------------------------------

bool wxSpinCtrl::SetFont(const wxFont& font)
{
    if ( !wxWindowBase::SetFont(font) )
    {
        // nothing to do
        return false;
    }

    WXHANDLE hFont = GetFont().GetResourceHandle();
    (void)::SendMessage(GetBuddyHwnd(), WM_SETFONT, (WPARAM)hFont, TRUE);

    return true;
}

bool wxSpinCtrl::Show(bool show)
{
    if ( !wxControl::Show(show) )
    {
        return false;
    }

    ::ShowWindow(GetBuddyHwnd(), show ? SW_SHOW : SW_HIDE);

    return true;
}

bool wxSpinCtrl::Enable(bool enable)
{
    if ( !wxControl::Enable(enable) )
    {
        return false;
    }

    ::EnableWindow(GetBuddyHwnd(), enable);

    return true;
}

void wxSpinCtrl::SetFocus()
{
    ::SetFocus(GetBuddyHwnd());
}

#if wxUSE_TOOLTIPS

void wxSpinCtrl::DoSetToolTip(wxToolTip *tip)
{
    wxSpinButton::DoSetToolTip(tip);

    if ( tip )
        tip->Add(m_hwndBuddy);
}

#endif // wxUSE_TOOLTIPS

// ----------------------------------------------------------------------------
// event processing
// ----------------------------------------------------------------------------

void wxSpinCtrl::OnSpinChange(wxSpinEvent& eventSpin)
{
    wxCommandEvent event(wxEVT_COMMAND_SPINCTRL_UPDATED, GetId());
    event.SetEventObject(this);
    event.SetInt(eventSpin.GetPosition());

    (void)GetEventHandler()->ProcessEvent(event);

    if ( eventSpin.GetSkipped() )
    {
        event.Skip();
    }
}

// ----------------------------------------------------------------------------
// size calculations
// ----------------------------------------------------------------------------

wxSize wxSpinCtrl::DoGetBestSize() const
{
    wxSize sizeBtn = wxSpinButton::DoGetBestSize();
    sizeBtn.x += DEFAULT_ITEM_WIDTH + MARGIN_BETWEEN;

    int y;
    wxGetCharSize(GetHWND(), NULL, &y, GetFont());
    y = EDIT_HEIGHT_FROM_CHAR_HEIGHT(y);

    // JACS: we should always use the height calculated
    // from above, because otherwise we'll get a spin control
    // that's too big. So never use the height calculated
    // from wxSpinButton::DoGetBestSize().

    // if ( sizeBtn.y < y )
    {
        // make the text tall enough
        sizeBtn.y = y;
    }

    return sizeBtn;
}

void wxSpinCtrl::DoMoveWindow(int x, int y, int width, int height)
{
    int widthBtn = wxSpinButton::DoGetBestSize().x;
    int widthText = width - widthBtn - MARGIN_BETWEEN;
    if ( widthText <= 0 )
    {
        wxLogDebug(_T("not enough space for wxSpinCtrl!"));
    }

    // 1) The buddy window
    DoMoveSibling(m_hwndBuddy, x, y, widthText, height);

    // 2) The button window
    x += widthText + MARGIN_BETWEEN;
    wxSpinButton::DoMoveWindow(x, y, widthBtn, height);
}

// get total size of the control
void wxSpinCtrl::DoGetSize(int *x, int *y) const
{
    RECT spinrect, textrect, ctrlrect;
    GetWindowRect(GetHwnd(), &spinrect);
    GetWindowRect(GetBuddyHwnd(), &textrect);
    UnionRect(&ctrlrect,&textrect, &spinrect);

    if ( x )
        *x = ctrlrect.right - ctrlrect.left;
    if ( y )
        *y = ctrlrect.bottom - ctrlrect.top;
}

void wxSpinCtrl::DoGetPosition(int *x, int *y) const
{
    // hack: pretend that our HWND is the text control just for a moment
    WXHWND hWnd = GetHWND();
    wxConstCast(this, wxSpinCtrl)->m_hWnd = m_hwndBuddy;

    wxSpinButton::DoGetPosition(x, y);

    wxConstCast(this, wxSpinCtrl)->m_hWnd = hWnd;
}

#endif // wxUSE_SPINCTRL