wxpython skin bug（staticbox背景绘制）

用了皮肤bug真多，staticbox 不能用，背景成了透明的,而且拖动大小后背景不会刷新。成了下面的效果

还好手头有源代码，只有慢慢看源码，找原因了。

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"), label, pos, size) )
        return false;

    // Always use LTR layout. Otherwise, the label would be mirrored.
    SetLayoutDirection(wxLayout_LeftToRight);

#ifndef __WXWINCE__
    if (!wxSystemOptions::IsFalse(wxT("msw.staticbox.optimized-paint")))
        Connect(wxEVT_PAINT, wxPaintEventHandler(wxStaticBox::OnPaint));
#endif // !__WXWINCE__

    return true;
}

staticbox的创建函数，OnPaint是protected的，python代码好像没法调用

在OnPaint处打上断点，发现加载皮肤库没有进入，估计是SkinSharp内置的消息钩子处理了PAINT消息，导致

OnPaint事件无效。。。。。。。。。

// all the hacks below are not necessary for WinCE
#ifndef __WXWINCE__

WXLRESULT wxStaticBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
{
    if ( nMsg == WM_NCHITTEST )
    {
        // This code breaks some other processing such as enter/leave tracking
        // so it's off by default.

        static int s_useHTClient = -1;
        if (s_useHTClient == -1)
            s_useHTClient = wxSystemOptions::GetOptionInt(wxT("msw.staticbox.htclient"));
        if (s_useHTClient == 1)
        {
            int xPos = GET_X_LPARAM(lParam);
            int yPos = GET_Y_LPARAM(lParam);

            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;
        }
    }

    if ( nMsg == WM_PRINTCLIENT )
    {
        // we have to process WM_PRINTCLIENT ourselves as otherwise child
        // windows' background (eg buttons in radio box) would never be drawn
        // unless we have a parent with non default background

        // so check first if we have one
        if ( !HandlePrintClient((WXHDC)wParam) )
        {
            // no, we don't, erase the background ourselves
            // (don't use our own) - see PaintBackground for explanation
            wxBrush brush(GetParent()->GetBackgroundColour());
            wxFillRect(GetHwnd(), (HDC)wParam, GetHbrushOf(brush));
        }

        return 0;
    }

    if ( nMsg == WM_UPDATEUISTATE )
    {
        // DefWindowProc() redraws just the static box text when it gets this
        // message and it does it using the standard (blue in standard theme)
        // colour and not our own label colour that we use in PaintForeground()
        // resulting in the label mysteriously changing the colour when e.g.
        // "Alt" is pressed anywhere in the window, see #12497.
        //
        // To avoid this we simply refresh the window forcing our own code
        // redrawing the label in the correct colour to be called. This is
        // inefficient but there doesn't seem to be anything else we can do.
        //
        // Notice that the problem is XP-specific and doesn't arise under later
        // systems.
        if ( m_hasFgCol && wxGetWinVersion() == wxWinVersion_XP )
            Refresh();
    }

	//xugangjava add this
	if (nMsg==WM_NCPAINT)
	{
		OnPaint(wxPaintEvent());
	}
	//xugangjava add this

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

staticbox下面还有这样一个函数，hook本地消息的，只有试一下看了，拦截WM_NCPAINT

调用OnPaint，Ok 编译替换[wxmsw294u_core_vc90.dll]文件

运行代码，一切正常，