Ejemplo n.º 1
0
// Uses the theme to draw the border and fill for something like a wxTextCtrl
void wxRendererXP::DrawTextCtrl(wxWindow* win,
                                wxDC& dc,
                                const wxRect& rect,
                                int flags)
{
    wxUxThemeHandle hTheme(win, L"EDIT");
    if ( !hTheme )
    {
        m_rendererNative.DrawTextCtrl(win,dc,rect,flags);
        return;
    }

    wxColour fill;
    wxColour bdr;
    COLORREF cref;

    wxUxThemeEngine::Get()->GetThemeColor(hTheme, EP_EDITTEXT,
                                          ETS_NORMAL, TMT_FILLCOLOR, &cref);
    fill = wxRGBToColour(cref);

    int etsState;
    if ( flags & wxCONTROL_DISABLED )
        etsState = ETS_DISABLED;
    else
        etsState = ETS_NORMAL;

    wxUxThemeEngine::Get()->GetThemeColor(hTheme, EP_EDITTEXT,
                                              etsState, TMT_BORDERCOLOR, &cref);
    bdr = wxRGBToColour(cref);

    dc.SetPen( bdr );
    dc.SetBrush( fill );
    dc.DrawRectangle(rect);
}
Ejemplo n.º 2
0
// Uses the theme to draw the border and fill for something like a wxTextCtrl
void wxRendererMSW::DrawTextCtrl(wxWindow* win, wxDC& dc, const wxRect& rect, int flags)
{
    wxColour fill;
    wxColour bdr;
    COLORREF cref;

#if wxUSE_UXTHEME
    wxUxThemeHandle hTheme(win, L"EDIT");
    if (hTheme)
    {
        wxUxThemeEngine::Get()->GetThemeColor(hTheme, EP_EDITTEXT,
                                              ETS_NORMAL, TMT_FILLCOLOR, &cref);
        fill = wxRGBToColour(cref);

        int etsState;
        if ( flags & wxCONTROL_DISABLED )
            etsState = ETS_DISABLED;
        else
            etsState = ETS_NORMAL;

        wxUxThemeEngine::Get()->GetThemeColor(hTheme, EP_EDITTEXT,
                                              etsState, TMT_BORDERCOLOR, &cref);
        bdr = wxRGBToColour(cref);
    }
    else
#endif
    {
        fill = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
        bdr = *wxBLACK;
    }

    dc.SetPen( bdr );
    dc.SetBrush( fill );
    dc.DrawRectangle(rect);
}
Ejemplo n.º 3
0
int wxColourDialog::ShowModal()
{
    // initialize the struct used by Windows
    CHOOSECOLOR chooseColorStruct;
    memset(&chooseColorStruct, 0, sizeof(CHOOSECOLOR));

    size_t i;

    // and transfer data from m_colourData to it
    COLORREF custColours[16];
    for ( i = 0; i < WXSIZEOF(custColours); i++ )
    {
        if ( m_colourData.GetCustomColour(i).IsOk() )
            custColours[i] = wxColourToRGB(m_colourData.GetCustomColour(i));
        else
            custColours[i] = RGB(255,255,255);
    }

    chooseColorStruct.lStructSize = sizeof(CHOOSECOLOR);
    if ( m_parent )
        chooseColorStruct.hwndOwner = GetHwndOf(m_parent);
    chooseColorStruct.rgbResult = wxColourToRGB(m_colourData.GetColour());
    chooseColorStruct.lpCustColors = custColours;

    chooseColorStruct.Flags = CC_RGBINIT | CC_ENABLEHOOK;
    chooseColorStruct.lCustData = (LPARAM)this;
    chooseColorStruct.lpfnHook = wxColourDialogHookProc;

    if ( m_colourData.GetChooseFull() )
        chooseColorStruct.Flags |= CC_FULLOPEN;

    // do show the modal dialog
    if ( !::ChooseColor(&chooseColorStruct) )
    {
        // 0 error means the dialog was simply cancelled, i.e. no real error
        // occurred
        const DWORD err = CommDlgExtendedError();
        if ( err )
            wxLogError(_("Colour selection dialog failed with error %0lx."), err);

        return wxID_CANCEL;
    }


    // transfer the values chosen by user back into m_colourData
    for ( i = 0; i < WXSIZEOF(custColours); i++ )
    {
      wxRGBToColour(m_colourData.m_custColours[i], custColours[i]);
    }

    wxRGBToColour(m_colourData.GetColour(), chooseColorStruct.rgbResult);

    // this doesn't seem to work (contrary to what MSDN implies) on current
    // Windows versions: CC_FULLOPEN is never set on return if it wasn't
    // initially set and vice versa
    //m_colourData.SetChooseFull((chooseColorStruct.Flags & CC_FULLOPEN) != 0);

    return wxID_OK;
}
Ejemplo n.º 4
0
int wxColourDialog::ShowModal()
{
    CHOOSECOLOR chooseColorStruct;
    COLORREF custColours[16];
    memset(&chooseColorStruct, 0, sizeof(CHOOSECOLOR));

    int i;
    for (i = 0; i < 16; i++)
    {
        if (m_colourData.m_custColours[i].Ok())
            custColours[i] = wxColourToRGB(m_colourData.m_custColours[i]);
        else
            custColours[i] = RGB(255,255,255);
    }

    chooseColorStruct.lStructSize = sizeof(CHOOSECOLOR);
    if ( m_parent )
        chooseColorStruct.hwndOwner = GetHwndOf(m_parent);
    chooseColorStruct.rgbResult = wxColourToRGB(m_colourData.m_dataColour);
    chooseColorStruct.lpCustColors = custColours;

    chooseColorStruct.Flags = CC_RGBINIT | CC_ENABLEHOOK;
    chooseColorStruct.lCustData = (LPARAM)this;
    chooseColorStruct.lpfnHook = wxColourDialogHookProc;

    if (m_colourData.GetChooseFull())
        chooseColorStruct.Flags |= CC_FULLOPEN;

    // Do the modal dialog
    bool success = ::ChooseColor(&(chooseColorStruct)) != 0;

    // Try to highlight the correct window (the parent)
    if (GetParent())
    {
      HWND hWndParent = (HWND) GetParent()->GetHWND();
      if (hWndParent)
        ::BringWindowToTop(hWndParent);
    }


    // Restore values
    for (i = 0; i < 16; i++)
    {
      wxRGBToColour(m_colourData.m_custColours[i], custColours[i]);
    }

    wxRGBToColour(m_colourData.m_dataColour, chooseColorStruct.rgbResult);

    return success ? wxID_OK : wxID_CANCEL;
}
Ejemplo n.º 5
0
void wxComboCtrl::OnThemeChange()
{
    // there doesn't seem to be any way to get the text colour using themes
    // API: TMT_TEXTCOLOR doesn't work neither for EDIT nor COMBOBOX
    SetForegroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT));

#if wxUSE_UXTHEME
    wxUxThemeEngine * const theme = wxUxThemeEngine::GetIfActive();
    if ( theme )
    {
        // NB: use EDIT, not COMBOBOX (the latter works in XP but not Vista)
        wxUxThemeHandle hTheme(this, L"EDIT");
        COLORREF col;
        HRESULT hr = theme->GetThemeColor
                            (
                                hTheme,
                                EP_EDITTEXT,
                                ETS_NORMAL,
                                TMT_FILLCOLOR,
                                &col
                            );
        if ( SUCCEEDED(hr) )
        {
            SetBackgroundColour(wxRGBToColour(col));

            // skip the call below
            return;
        }

        wxLogApiError(_T("GetThemeColor(EDIT, ETS_NORMAL, TMT_FILLCOLOR)"), hr);
    }
#endif

    SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
}
Ejemplo n.º 6
0
    WXMainToolbar(wxFrame *parent)
    {
        m_tb = wxXmlResource::Get()->LoadToolBar(parent, "toolbar");
        m_idUpdate = XRCID("toolbar_update");

#ifdef __WXGTK3__
        gtk_style_context_add_class(gtk_widget_get_style_context(GTK_WIDGET(Toolbar())), GTK_STYLE_CLASS_PRIMARY_TOOLBAR);
        SetIcon(0 , "document-open-symbolic");
        SetIcon(1 , "document-save-symbolic");
        SetIcon(3 , "poedit-validate-symbolic");
        SetIcon(4 , "poedit-update-symbolic");
        SetIcon(6 , "sidebar-symbolic");
#endif

#ifdef __WXMSW__
        // De-uglify the toolbar a bit on Windows 10:
        if (IsWindows10OrGreater())
        {
            if (wxUxThemeIsActive())
            {
                wxUxThemeHandle hTheme(m_tb, L"ExplorerMenu::Toolbar");
                m_tb->SetBackgroundColour(wxRGBToColour(::GetThemeSysColor(hTheme, COLOR_WINDOW)));
            }

            unsigned padding = PX(4);
            ::SendMessage((HWND) m_tb->GetHWND(), TB_SETPADDING, 0, MAKELPARAM(padding, padding));
        }
        m_tb->SetDoubleBuffered(true);
#endif
    }
Ejemplo n.º 7
0
ManagerFrame::ManagerFrame() :
    wxFrame(NULL, -1, _("Poedit - Catalogs manager"),
            wxDefaultPosition, wxDefaultSize,
            wxDEFAULT_FRAME_STYLE | wxNO_FULL_REPAINT_ON_RESIZE,
            "manager")
{
#if defined(__WXGTK__)
    wxIconBundle appicons;
    appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(16,16)));
    appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(32,32)));
    appicons.AddIcon(wxArtProvider::GetIcon("poedit", wxART_FRAME_ICON, wxSize(48,48)));
    SetIcons(appicons);
#elif defined(__WXMSW__)
    SetIcons(wxIconBundle(wxStandardPaths::Get().GetResourcesDir() + "\\Resources\\Poedit.ico"));
#endif

    ms_instance = this;

    auto tb = wxXmlResource::Get()->LoadToolBar(this, "manager_toolbar");
    (void)tb;
#ifdef __WXMSW__
    // De-uglify the toolbar a bit on Windows 10:
    if (IsWindows10OrGreater())
    {
        const wxUxThemeEngine* theme = wxUxThemeEngine::GetIfActive();
        if (theme)
        {
            wxUxThemeHandle hTheme(tb, L"ExplorerMenu::Toolbar");
            tb->SetBackgroundColour(wxRGBToColour(theme->GetThemeSysColor(hTheme, COLOR_WINDOW)));
        }
    }
#endif

    wxPanel *panel = wxXmlResource::Get()->LoadPanel(this, "manager_panel");

    m_listPrj = XRCCTRL(*panel, "prj_list", wxListBox);
    m_listCat = XRCCTRL(*panel, "prj_files", wxListCtrl);
    m_splitter = XRCCTRL(*panel, "manager_splitter", wxSplitterWindow);

    wxImageList *list = new wxImageList(PX(16), PX(16));
    list->Add(wxArtProvider::GetBitmap("poedit-status-cat-no"));
    list->Add(wxArtProvider::GetBitmap("poedit-status-cat-mid"));
    list->Add(wxArtProvider::GetBitmap("poedit-status-cat-ok"));
    m_listCat->AssignImageList(list, wxIMAGE_LIST_SMALL);

    m_curPrj = -1;

    int last = (int)wxConfig::Get()->Read("manager_last_selected", (long)0);

    // FIXME: do this in background (here and elsewhere)
    UpdateListPrj(last);
    if (m_listPrj->GetCount() > 0)
        UpdateListCat(last);

    RestoreWindowState(this, wxSize(PX(400), PX(300)));

    m_splitter->SetSashPosition((int)wxConfig::Get()->Read("manager_splitter", PX(200)));
}
Ejemplo n.º 8
0
void wxMenuItem::GetColourToUse(wxODStatus stat, wxColour& colText, wxColour& colBack) const
{
#if wxUSE_UXTHEME
    wxUxThemeEngine* theme = MenuDrawData::GetUxThemeEngine();
    if ( theme )
    {
        wxUxThemeHandle hTheme(GetMenu()->GetWindow(), L"MENU");

        if ( stat & wxODDisabled)
        {
            wxRGBToColour(colText, theme->GetThemeSysColor(hTheme, COLOR_GRAYTEXT));
        }
        else
        {
            colText = GetTextColour();
            if ( !colText.IsOk() )
                wxRGBToColour(colText, theme->GetThemeSysColor(hTheme, COLOR_MENUTEXT));
        }

        if ( stat & wxODSelected )
        {
            wxRGBToColour(colBack, theme->GetThemeSysColor(hTheme, COLOR_HIGHLIGHT));
        }
        else
        {
            colBack = GetBackgroundColour();
            if ( !colBack.IsOk() )
                wxRGBToColour(colBack, theme->GetThemeSysColor(hTheme, COLOR_MENU));
        }
    }
    else
#endif // wxUSE_UXTHEME
    {
        wxOwnerDrawn::GetColourToUse(stat, colText, colBack);
    }
}
Ejemplo n.º 9
0
wxColour wxSystemSettingsNative::GetColour(wxSystemColour index)
{
    if ( index == wxSYS_COLOUR_LISTBOXTEXT)
    {
        // there is no standard colour with this index, map to another one
        index = wxSYS_COLOUR_WINDOWTEXT;
    }
    else if ( index == wxSYS_COLOUR_LISTBOXHIGHLIGHTTEXT)
    {
        // there is no standard colour with this index, map to another one
        index = wxSYS_COLOUR_HIGHLIGHTTEXT;
    }
    else if ( index == wxSYS_COLOUR_LISTBOX )
    {
        // there is no standard colour with this index, map to another one
        index = wxSYS_COLOUR_WINDOW;
    }
    else if ( index > wxSYS_COLOUR_BTNHIGHLIGHT )
    {
        // Determine if we are using flat menus, only then allow wxSYS_COLOUR_MENUBAR
        if ( index == wxSYS_COLOUR_MENUBAR )
        {
            BOOL isFlat ;
            if ( SystemParametersInfo( SPI_GETFLATMENU , 0 ,&isFlat, 0 ) )
            {
                if ( !isFlat )
                    index = wxSYS_COLOUR_MENU ;
            }
        }
    }

    COLORREF colSys = ::GetSysColor(index);

    wxColour ret = wxRGBToColour(colSys);
    wxASSERT(ret.IsOk());
    return ret;
}
Ejemplo n.º 10
0
static HBITMAP GetMaskForImage(const wxBitmap& bitmap, const wxBitmap& mask)
{
#if wxUSE_IMAGE
    wxBitmap bitmapWithMask;
#endif // wxUSE_IMAGE

    HBITMAP hbmpMask;
    wxMask *pMask;
    bool deleteMask = false;

    if ( mask.IsOk() )
    {
        hbmpMask = GetHbitmapOf(mask);
        pMask = NULL;
    }
    else
    {
        pMask = bitmap.GetMask();

#if wxUSE_IMAGE
        // check if we don't have alpha in this bitmap -- we can create a mask
        // from it (and we need to do it for the older systems which don't
        // support 32bpp bitmaps natively)
        if ( !pMask )
        {
            wxImage img(bitmap.ConvertToImage());
            if ( img.HasAlpha() )
            {
                img.ConvertAlphaToMask();
                bitmapWithMask = wxBitmap(img);
                pMask = bitmapWithMask.GetMask();
            }
        }
#endif // wxUSE_IMAGE

        if ( !pMask )
        {
            // use the light grey count as transparent: the trouble here is
            // that the light grey might have been changed by Windows behind
            // our back, so use the standard colour map to get its real value
            wxCOLORMAP *cmap = wxGetStdColourMap();
            wxColour col;
            wxRGBToColour(col, cmap[wxSTD_COL_BTNFACE].from);

            pMask = new wxMask(bitmap, col);

            deleteMask = true;
        }

        hbmpMask = (HBITMAP)pMask->GetMaskBitmap();
    }

    // windows mask convention is opposite to the wxWidgets one
    HBITMAP hbmpMaskInv = wxInvertMask(hbmpMask);

    if ( deleteMask )
    {
        delete pMask;
    }

    return hbmpMaskInv;
}
Ejemplo n.º 11
0
int wxFontDialog::ShowModal()
{
    // It should be OK to always use GDI simulations
    DWORD flags = CF_SCREENFONTS /* | CF_NOSIMULATIONS */ ;

    LOGFONT logFont;

    CHOOSEFONT chooseFontStruct;
    wxZeroMemory(chooseFontStruct);

    chooseFontStruct.lStructSize = sizeof(CHOOSEFONT);
    if ( m_parent )
        chooseFontStruct.hwndOwner = GetHwndOf(m_parent);
    chooseFontStruct.lpLogFont = &logFont;

    if ( m_fontData.m_initialFont.IsOk() )
    {
        flags |= CF_INITTOLOGFONTSTRUCT;
        wxFillLogFont(&logFont, &m_fontData.m_initialFont);
    }

    if ( m_fontData.m_fontColour.IsOk() )
    {
        chooseFontStruct.rgbColors = wxColourToRGB(m_fontData.m_fontColour);
    }

    // CF_ANSIONLY flag is obsolete for Win32
    if ( !m_fontData.GetAllowSymbols() )
    {
      flags |= CF_SELECTSCRIPT;
      logFont.lfCharSet = ANSI_CHARSET;
    }

    if ( m_fontData.GetEnableEffects() )
      flags |= CF_EFFECTS;
    if ( m_fontData.GetShowHelp() )
      flags |= CF_SHOWHELP;

    if ( m_fontData.m_minSize != 0 || m_fontData.m_maxSize != 0 )
    {
        chooseFontStruct.nSizeMin = m_fontData.m_minSize;
        chooseFontStruct.nSizeMax = m_fontData.m_maxSize;
        flags |= CF_LIMITSIZE;
    }

    chooseFontStruct.Flags = flags;

    if ( ChooseFont(&chooseFontStruct) != 0 )
    {
        wxRGBToColour(m_fontData.m_fontColour, chooseFontStruct.rgbColors);
        m_fontData.m_chosenFont = wxCreateFontFromLogFont(&logFont);
        m_fontData.EncodingInfo().facename = logFont.lfFaceName;
        m_fontData.EncodingInfo().charset = logFont.lfCharSet;

        return wxID_OK;
    }
    else
    {
        DWORD dwErr = CommDlgExtendedError();
        if ( dwErr != 0 )
        {
            wxLogError(_("Common dialog failed with error code %0lx."), dwErr);
        }
        //else: it was just cancelled

        return wxID_CANCEL;
    }
}
Ejemplo n.º 12
0
// Windows only: attempts to get colour for UX theme page background
wxColour wxNotebook::GetThemeBackgroundColour() const
{
#if wxUSE_UXTHEME
    if (wxUxThemeEngine::Get())
    {
        wxUxThemeHandle hTheme((wxNotebook*) this, L"TAB");
        if (hTheme)
        {
            // This is total guesswork.
            // See PlatformSDK\Include\Tmschema.h for values.
            // JACS: can also use 9 (TABP_PANE)
            COLORREF themeColor;
            bool success = (S_OK == wxUxThemeEngine::Get()->GetThemeColor(
                                        hTheme,
                                        10 /* TABP_BODY */,
                                        1 /* NORMAL */,
                                        3821 /* FILLCOLORHINT */,
                                        &themeColor));
            if (!success)
                return GetBackgroundColour();

            /*
            [DS] Workaround for WindowBlinds:
            Some themes return a near black theme color using FILLCOLORHINT,
            this makes notebook pages have an ugly black background and makes
            text (usually black) unreadable. Retry again with FILLCOLOR.

            This workaround potentially breaks appearance of some themes,
            but in practice it already fixes some themes.
            */
            if (themeColor == 1)
            {
                wxUxThemeEngine::Get()->GetThemeColor(
                                            hTheme,
                                            10 /* TABP_BODY */,
                                            1 /* NORMAL */,
                                            3802 /* FILLCOLOR */,
                                            &themeColor);
            }

            wxColour colour = wxRGBToColour(themeColor);

            // Under Vista, the tab background colour is reported incorrectly.
            // So for the default theme at least, hard-code the colour to something
            // that will blend in.

            static int s_AeroStatus = -1;
            if (s_AeroStatus == -1)
            {
                WCHAR szwThemeFile[1024];
                WCHAR szwThemeColor[256];
                if (S_OK == wxUxThemeEngine::Get()->GetCurrentThemeName(szwThemeFile, 1024, szwThemeColor, 256, NULL, 0))
                {
                    wxString themeFile(szwThemeFile), themeColor(szwThemeColor);
                    if (themeFile.Find(wxT("Aero")) != -1 && themeColor == wxT("NormalColor"))
                        s_AeroStatus = 1;
                    else
                        s_AeroStatus = 0;
                }
                else
                    s_AeroStatus = 0;
            }

            if (s_AeroStatus == 1)
                colour = wxColour(255, 255, 255);

            return colour;
        }
    }
#endif // wxUSE_UXTHEME

    return GetBackgroundColour();
}
Ejemplo n.º 13
0
    wxRichToolTipPopup(wxWindow* parent,
                       const wxString& title,
                       const wxString& message,
                       const wxIcon& icon,
                       wxTipKind tipKind,
                       const wxFont& titleFont_) :
        m_timer(this)
    {
        Create(parent, wxFRAME_SHAPED);


        wxBoxSizer* const sizerTitle = new wxBoxSizer(wxHORIZONTAL);
        if ( icon.IsOk() )
        {
            sizerTitle->Add(new wxStaticBitmap(this, wxID_ANY, icon),
                            wxSizerFlags().Centre().Border(wxRIGHT));
        }
        //else: Simply don't show any icon.

        wxStaticText* const labelTitle = new wxStaticText(this, wxID_ANY, "");
        labelTitle->SetLabelText(title);

        wxFont titleFont(titleFont_);
        if ( !titleFont.IsOk() )
        {
            // Determine the appropriate title font for the current platform.
            titleFont = labelTitle->GetFont();

#ifdef __WXMSW__
            // When using themes MSW tooltips use larger bluish version of the
            // normal font.
            wxUxThemeEngine* const theme = GetTooltipTheme();
            if ( theme )
            {
                titleFont.MakeLarger();

                COLORREF c;
                if ( FAILED(theme->GetThemeColor
                                   (
                                        wxUxThemeHandle(parent, L"TOOLTIP"),
                                        TTP_BALLOONTITLE,
                                        0,
                                        TMT_TEXTCOLOR,
                                        &c
                                    )) )
                {
                    // Use the standard value of this colour as fallback.
                    c = 0x993300;
                }

                labelTitle->SetForegroundColour(wxRGBToColour(c));
            }
            else
#endif // __WXMSW__
            {
                // Everything else, including "classic" MSW look uses just the
                // bold version of the base font.
                titleFont.MakeBold();
            }
        }

        labelTitle->SetFont(titleFont);
        sizerTitle->Add(labelTitle, wxSizerFlags().Centre());

        wxBoxSizer* const sizerTop = new wxBoxSizer(wxVERTICAL);
        sizerTop->Add(sizerTitle,
                        wxSizerFlags().DoubleBorder(wxLEFT|wxRIGHT|wxTOP));

        // Use a spacer as we don't want to have a double border between the
        // elements, just a simple one will do.
        sizerTop->AddSpacer(wxSizerFlags::GetDefaultBorder());

        wxTextSizerWrapper wrapper(this);
        wxSizer* sizerText = wrapper.CreateSizer(message, -1 /* No wrapping */);

#ifdef __WXMSW__
        if ( icon.IsOk() && GetTooltipTheme() )
        {
            // Themed tooltips under MSW align the text with the title, not
            // with the icon, so use a helper horizontal sizer in this case.
            wxBoxSizer* const sizerTextIndent = new wxBoxSizer(wxHORIZONTAL);
            sizerTextIndent->AddSpacer(icon.GetWidth());
            sizerTextIndent->Add(sizerText,
                                    wxSizerFlags().Border(wxLEFT).Centre());

            sizerText = sizerTextIndent;
        }
#endif // !__WXMSW__
        sizerTop->Add(sizerText,
                        wxSizerFlags().DoubleBorder(wxLEFT|wxRIGHT|wxBOTTOM)
                                      .Centre());

        SetSizer(sizerTop);

        const int offsetY = SetTipShapeAndSize(tipKind, GetBestSize());
        if ( offsetY > 0 )
        {
            // Offset our contents by the tip height to make it appear in the
            // main rectangle.
            sizerTop->PrependSpacer(offsetY);
        }

        Layout();
    }
Ejemplo n.º 14
0
    void SetBackgroundColours(wxColour colStart, wxColour colEnd)
    {
        if ( !colStart.IsOk() )
        {
            // Determine the best colour(s) to use on our own.
#ifdef __WXMSW__
            wxUxThemeEngine* const theme = GetTooltipTheme();
            if ( theme )
            {
                wxUxThemeHandle hTheme(GetParent(), L"TOOLTIP");

                COLORREF c1, c2;
                if ( FAILED(theme->GetThemeColor
                                   (
                                        hTheme,
                                        TTP_BALLOONTITLE,
                                        0,
                                        TMT_GRADIENTCOLOR1,
                                        &c1
                                    )) ||
                    FAILED(theme->GetThemeColor
                                  (
                                        hTheme,
                                        TTP_BALLOONTITLE,
                                        0,
                                        TMT_GRADIENTCOLOR2,
                                        &c2
                                  )) )
                {
                    c1 = 0xffffff;
                    c2 = 0xf0e5e4;
                }

                colStart = wxRGBToColour(c1);
                colEnd = wxRGBToColour(c2);
            }
            else
#endif // __WXMSW__
            {
                colStart = wxSystemSettings::GetColour(wxSYS_COLOUR_INFOBK);
            }
        }

        if ( colEnd.IsOk() )
        {
            // Use gradient-filled background bitmap.
            const wxSize size = GetClientSize();
            wxBitmap bmp(size);
            {
                wxMemoryDC dc(bmp);
                dc.Clear();
                dc.GradientFillLinear(size, colStart, colEnd, wxDOWN);
            }

            SetBackgroundBitmap(bmp);
        }
        else // Use solid colour.
        {
            SetBackgroundColour(colStart);
        }
    }