always pass WM_DESTROY to DefWindowProc() - this fixes memory/resource leak for wxListBox

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

/////////////////////////////////////////////////////////////////////////////
// Name:        msw/statbox.cpp
// Purpose:     wxStaticBox
// Author:      Julian Smart
// Modified by:
// Created:     04/01/98
// RCS-ID:      $Id$
// Copyright:   (c) Julian Smart and Markus Holzem
// Licence:     wxWindows license
/////////////////////////////////////////////////////////////////////////////

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

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

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

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

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#if wxUSE_STATBOX

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

#include "wx/statbox.h"

#include "wx/msw/private.h"

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

IMPLEMENT_DYNAMIC_CLASS(wxStaticBox, wxControl)

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

// ----------------------------------------------------------------------------
// wxStaticBox
// ----------------------------------------------------------------------------

bool wxStaticBox::Create(wxWindow *parent,
                         wxWindowID id,
                         const wxString& label,
                         const wxPoint& pos,
                         const wxSize& size,
                         long style,
                         const wxString& name)
{
    if ( !CreateControl(parent, id, pos, size, style, wxDefaultValidator, name) )
        return FALSE;

    if ( !MSWCreateControl(wxT("BUTTON"), BS_GROUPBOX, pos, size, label, 0) )
        return FALSE;

    return TRUE;
}

wxSize wxStaticBox::DoGetBestSize() const
{
    int cx, cy;
    wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());

    int wBox;
    GetTextExtent(wxGetWindowText(m_hWnd), &wBox, &cy);

    wBox += 3*cx;
    int hBox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);

    return wxSize(wBox, hBox);
}

long wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
    switch ( nMsg )
    {
        case WM_NCHITTEST:
            // FIXME: this hack is specific to dialog ed, shouldn't it be
            //        somehow disabled during normal operation?
            {
                int xPos = LOWORD(lParam);  // horizontal position of cursor
                int yPos = HIWORD(lParam);  // vertical position of cursor

                ScreenToClient(&xPos, &yPos);

                // Make sure you can drag by the top of the groupbox, but let
                // other (enclosed) controls get mouse events also
                if ( yPos < 10 )
                    return (long)HTCLIENT;
            }
            break;

        case WM_ERASEBKGND:
            // prevent wxControl from processing this message because it will
            // erase the background incorrectly and there is no way for us to
            // override this at wxWin event level (if we do process the event,
            // we don't know how to do it properly - paint the background
            // without painting over other controls - and if we don't,
            // wxControl still gets it)
            return MSWDefWindowProc(nMsg, wParam, lParam);
    }

    return wxControl::MSWWindowProc(nMsg, wParam, lParam);
}

#endif // wxUSE_STATBOX