xref: /trunk/main/cui/source/dialogs/about.cxx (revision d8dff77764cb74143fabc617dc8ee25d946bae78)
1 /**************************************************************
2  *
3  * Licensed to the Apache Software Foundation (ASF) under one
4  * or more contributor license agreements.  See the NOTICE file
5  * distributed with this work for additional information
6  * regarding copyright ownership.  The ASF licenses this file
7  * to you under the Apache License, Version 2.0 (the
8  * "License"); you may not use this file except in compliance
9  * with the License.  You may obtain a copy of the License at
10  *
11  *   http://www.apache.org/licenses/LICENSE-2.0
12  *
13  * Unless required by applicable law or agreed to in writing,
14  * software distributed under the License is distributed on an
15  * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16  * KIND, either express or implied.  See the License for the
17  * specific language governing permissions and limitations
18  * under the License.
19  *
20  *************************************************************/
21 
22 // MARKER(update_precomp.py): autogen include statement, do not remove
23 #include "precompiled_cui.hxx"
24 
25 #include <comphelper/processfactory.hxx>
26 #include <dialmgr.hxx>
27 #include <osl/file.hxx>
28 #include <rtl/bootstrap.hxx>
29 //#include <rtl/ustrbuf.hxx>
30 #include <sfx2/sfxcommands.h>
31 #include <sfx2/sfxdefs.hxx>
32 #include <sfx2/sfxuno.hxx>
33 #include <svtools/filter.hxx>
34 #include <svtools/svtools.hrc>
35 #include <tools/stream.hxx>
36 #include <tools/urlobj.hxx>
37 #include <unotools/bootstrap.hxx>
38 #include <unotools/configmgr.hxx>
39 #include <vcl/graph.hxx>
40 #include <vcl/imagerepository.hxx>
41 #include <vcl/msgbox.hxx>
42 #include <vcl/svapp.hxx>
43 #include <vcl/tabctrl.hxx>
44 #include <vcl/tabdlg.hxx>
45 #include <vcl/tabpage.hxx>
46 
47 #include <com/sun/star/system/SystemShellExecuteFlags.hpp>
48 #include <com/sun/star/system/SystemShellExecute.hpp>
49 #include <com/sun/star/uno/Any.h>
50 
51 #include "about.hxx"
52 #include "about.hrc"
53 
54 #define _STRINGIFY(x) #x
55 #define STRINGIFY(x) _STRINGIFY(x)
56 
57 /* On Windows/OS2, all the three files have .txt extension
58    and the README file name is in lowercase
59    Readme files are localized and have the locale in their file name:
60    README_de README_en-US
61 */
62 #if defined(WNT) || defined(OS2)
63 #define FILE_EXTENSION  ".txt"
64 #define README_FILE     "readme"
65 #else
66 #define FILE_EXTENSION
67 #define README_FILE     "README"
68 #endif
69 #define LICENSE_FILE    "LICENSE" FILE_EXTENSION
70 #define NOTICE_FILE     "NOTICE"  FILE_EXTENSION
71 
72 // Dir where the files are located
73 #define OOO_DIR_SHARE_README  "${OOO_BASE_DIR}/share/readme/"
74 
75 using namespace com::sun::star;
76 
77 namespace
78 {
79 
80     static void lcl_layoutFixedText( FixedText &rControl,
81                                      const Point& aPos,
82                                      Size &aSize,
83                                      const long nTextWidth )
84     {
85         aSize = rControl.GetSizePixel();
86         // change the width
87         aSize.Width() = nTextWidth;
88         // set Position and Size, to calculate the minimum size
89         // this will update the Height
90         rControl.SetPosSizePixel( aPos, aSize );
91         aSize = rControl.CalcMinimumSize();
92         // update the size with the right Height
93         rControl.SetSizePixel( aSize );
94     }
95 
96     static void lcl_layoutEdit( Edit &rControl,
97                                 const Point& aPos,
98                                 Size &aSize,
99                                 const long nTextWidth )
100     {
101         aSize = rControl.GetSizePixel();
102         // change the width
103         aSize.Width() = nTextWidth;
104         // set Position and Size, to calculate the minimum size
105         // this will update the Height
106         rControl.SetPosSizePixel( aPos, aSize );
107         aSize = rControl.CalcMinimumSize();
108         // update the size with the right Height
109         rControl.SetSizePixel( aSize );
110     }
111 
112     static void lcl_readTxtFile( const rtl::OUString &rFile, rtl::OUString &sText )
113     {
114         rtl::OUString sFile( rFile );
115         rtl::Bootstrap::expandMacros( sFile );
116         osl::File aFile(sFile);
117         if ( aFile.open(OpenFlag_Read) == osl::FileBase::E_None )
118         {
119             osl::DirectoryItem aItem;
120             osl::DirectoryItem::get(sFile, aItem);
121 
122             osl::FileStatus aStatus(FileStatusMask_FileSize);
123             aItem.getFileStatus(aStatus);
124 
125             sal_uInt64 nBytesRead = 0;
126             sal_uInt64 nPosition = 0;
127             sal_uInt32 nBytes = (sal_uInt32)aStatus.getFileSize();
128 
129             sal_Char *pBuffer = new sal_Char[nBytes];
130 
131             while ( aFile.read( pBuffer + nPosition,
132                                 nBytes-nPosition,
133                                 nBytesRead ) == osl::FileBase::E_None
134                     && nPosition + nBytesRead < nBytes)
135             {
136                 nPosition += nBytesRead;
137             }
138 
139             OSL_ENSURE( nBytes < STRING_MAXLEN, "Text file has too much bytes!" );
140             if ( nBytes > STRING_MAXLEN )
141                 nBytes = STRING_MAXLEN - 1;
142 
143             sText = rtl::OUString( pBuffer,
144                                 nBytes,
145                                 RTL_TEXTENCODING_UTF8,
146                                 OSTRING_TO_OUSTRING_CVTFLAGS
147                                 | RTL_TEXTTOUNICODE_FLAGS_GLOBAL_SIGNATURE);
148             delete[] pBuffer;
149         }
150     }
151 
152     class ReadmeDialog;
153 
154     class ReadmeTabPage : public TabPage
155     {
156     private:
157         MultiLineEdit maText;
158         String        msText;
159 
160     public:
161         ReadmeTabPage(Window *pParent, const String &sText);
162         ~ReadmeTabPage();
163 
164         void Adjust(const Size &aSz, const Size &a6Size);
165     };
166 
167     ReadmeTabPage::ReadmeTabPage(Window *pParent, const String &sText)
168         : TabPage(pParent, CUI_RES( RID_CUI_README_TBPAGE))
169         ,maText( this, CUI_RES( RID_CUI_README_TBPAGE_EDIT ))
170         ,msText( sText )
171     {
172         FreeResource();
173 
174         maText.SetText(msText);
175         maText.Show();
176     }
177 
178     ReadmeTabPage::~ReadmeTabPage()
179     {
180     }
181 
182     void ReadmeTabPage::Adjust(const Size &aSz, const Size &a6Size)
183     {
184         long nDlgMargin  = a6Size.Width() * 2;
185         long nCtrlMargin = a6Size.Height() * 2;
186         maText.SetPosPixel( Point(a6Size.Width(), a6Size.Height()) );
187         maText.SetSizePixel( Size(aSz.Width() - nDlgMargin, aSz.Height() - nCtrlMargin) );
188     }
189 
190     class ReadmeDialog : public ModalDialog
191     {
192     private:
193         TabControl      maTabCtrl;
194         OKButton        maBtnOK;
195 
196         ReadmeTabPage  *maReadmeTabPage;
197         ReadmeTabPage  *maLicenseTabPage;
198         ReadmeTabPage  *maNoticeTabPage;
199 
200         DECL_LINK( ActivatePageHdl, TabControl * );
201         DECL_LINK( DeactivatePageHdl, TabControl * );
202 
203     public:
204         ReadmeDialog( Window* );
205         ~ReadmeDialog();
206     };
207 
208     ReadmeDialog::ReadmeDialog( Window * pParent )
209         : ModalDialog( pParent, CUI_RES( RID_CUI_README_DLG ) )
210         , maTabCtrl( this, CUI_RES(RID_CUI_README_TBCTL) )
211         , maBtnOK( this, CUI_RES(RID_CUI_README_OKBTN) )
212         , maReadmeTabPage(0)
213         , maLicenseTabPage(0)
214         , maNoticeTabPage(0)
215     {
216         FreeResource();
217 
218         maTabCtrl.Show();
219 
220         // Notice and License are not localized
221         const rtl::OUString sLicense( RTL_CONSTASCII_USTRINGPARAM( OOO_DIR_SHARE_README LICENSE_FILE ) );
222         const rtl::OUString sNotice( RTL_CONSTASCII_USTRINGPARAM(  OOO_DIR_SHARE_README NOTICE_FILE ) );
223 
224         // get localized README
225         rtl::OUStringBuffer aBuff;
226         lang::Locale aLocale = Application::GetSettings().GetUILocale();
227         aBuff.appendAscii( RTL_CONSTASCII_STRINGPARAM( OOO_DIR_SHARE_README README_FILE "_" ) );
228         aBuff.append( aLocale.Language );
229         if ( aLocale.Country.getLength() )
230         {
231             aBuff.append( sal_Unicode( '-') );
232             aBuff.append( aLocale.Country );
233             if ( aLocale.Variant.getLength() )
234             {
235                 aBuff.append( sal_Unicode( '-' ) );
236                 aBuff.append( aLocale.Variant );
237             }
238         }
239 #if defined(WNT) || defined(OS2)
240         aBuff.appendAscii( RTL_CONSTASCII_STRINGPARAM( FILE_EXTENSION ) );
241 #endif
242 
243         rtl::OUString sReadmeTxt, sLicenseTxt, sNoticeTxt;
244         lcl_readTxtFile( aBuff.makeStringAndClear(), sReadmeTxt );
245         lcl_readTxtFile( sLicense, sLicenseTxt );
246         lcl_readTxtFile( sNotice, sNoticeTxt );
247 
248         maReadmeTabPage = new ReadmeTabPage( &maTabCtrl, sReadmeTxt );
249         maLicenseTabPage = new ReadmeTabPage( &maTabCtrl, sLicenseTxt );
250         maNoticeTabPage = new ReadmeTabPage( &maTabCtrl, sNoticeTxt );
251 
252         maTabCtrl.SetTabPage( RID_CUI_READMEPAGE, maReadmeTabPage );
253         maTabCtrl.SetTabPage( RID_CUI_LICENSEPAGE, maLicenseTabPage );
254         maTabCtrl.SetTabPage( RID_CUI_NOTICEPAGE, maNoticeTabPage );
255 
256         maTabCtrl.SelectTabPage( RID_CUI_READMEPAGE );
257 
258         Size aTpSz  = maReadmeTabPage->GetOutputSizePixel();
259         Size a6Size = maReadmeTabPage->LogicToPixel( Size( 6, 6 ), MAP_APPFONT );
260 
261         maReadmeTabPage->Adjust( aTpSz, a6Size );
262         maLicenseTabPage->Adjust( aTpSz, a6Size );
263         maNoticeTabPage->Adjust( aTpSz, a6Size );
264 
265         Size aDlgSize = GetOutputSizePixel();
266         Size aOkBtnSz = maBtnOK.GetSizePixel();
267         Point aOKPnt( aDlgSize.Width() / 2 - aOkBtnSz.Width() / 2 , maBtnOK.GetPosPixel().Y() );
268         maBtnOK.SetPosPixel( aOKPnt );
269     }
270 
271     ReadmeDialog::~ReadmeDialog()
272     {
273         delete maReadmeTabPage;
274         delete maLicenseTabPage;
275         delete maNoticeTabPage;
276     }
277 }
278 
279 // -----------------------------------------------------------------------
280 
281 AboutDialog::AboutDialog( Window* pParent, const ResId & rId ) :
282     SfxModalDialog( pParent, rId ),
283     maOKButton( this, ResId( RID_CUI_ABOUT_BTN_OK, *rId.GetResMgr() ) ),
284     maReadmeButton( this, ResId( RID_CUI_ABOUT_BTN_README, *rId.GetResMgr() ) ),
285     maVersionText( this, ResId( RID_CUI_ABOUT_FTXT_VERSION, *rId.GetResMgr() ) ),
286     maBuildInfoEdit( this, ResId( RID_CUI_ABOUT_FTXT_BUILDDATA, *rId.GetResMgr() ) ),
287     maCopyrightEdit( this, ResId( RID_CUI_ABOUT_FTXT_COPYRIGHT, *rId.GetResMgr() ) ),
288     maCreditsLink( this, ResId( RID_CUI_ABOUT_FTXT_WELCOME_LINK, *rId.GetResMgr() ) )
289 //  maCopyrightTextStr( ResId( RID_CUI_ABOUT_STR_COPYRIGHT, *rId.GetResMgr() ) )
290 {
291     bool bLoad = vcl::ImageRepository::loadBrandingImage(
292             rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("about")),
293             maAppLogo );
294     OSL_ENSURE( bLoad, "Can't load about image");
295 
296     bLoad = vcl::ImageRepository::loadBrandingImage(
297             rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("logo")),
298             maMainLogo );
299     OSL_ENSURE( bLoad, "Can't load logo image");
300 
301     const String vendor( ResId( RID_CUI_ABOUT_STR_COPYRIGHT_VENDOR, *rId.GetResMgr() ) );
302     String createdRes( ResId( RID_CUI_ABOUT_STR_CREATED, *rId.GetResMgr() ) );
303     if ( !vendor.EqualsAscii("Apache Software Foundation") ) {
304         createdRes = String( ResId( RID_CUI_ABOUT_STR_CREATED_VENDOR, *rId.GetResMgr() ));
305     }
306     const String copyrightAcknowledge( ResId( RID_CUI_ABOUT_STR_ACKNOWLEDGE, *rId.GetResMgr() ) );
307 
308     rtl::OUStringBuffer sbcopyright(250);
309     sbcopyright.appendAscii("Copyright ");
310     sbcopyright.append((sal_Unicode)0x00a9);
311     sbcopyright.appendAscii(" ");
312     rtl::OUString sYear( RTL_CONSTASCII_USTRINGPARAM("2025") );
313     if (vendor.EqualsAscii("Apache Software Foundation")) {
314         sbcopyright.append(sYear);
315         sbcopyright.appendAscii(" The Apache Software Foundation.\n\n");
316     } else {
317 #ifdef COPYRIGHT_YEAR
318         const rtl::OUString sDefYear( RTL_CONSTASCII_USTRINGPARAM( STRINGIFY( COPYRIGHT_YEAR ) ) );
319         if ( sDefYear.getLength() > 0 )
320         {
321             sYear = sDefYear;
322         }
323 #endif
324         sbcopyright.append(sYear);
325         sbcopyright.appendAscii(" ");
326         sbcopyright.append(vendor);
327         sbcopyright.appendAscii(".\nPortion copyright The Apache Software Foundation.\n\n");
328     }
329     sbcopyright.append( createdRes );
330     sbcopyright.appendAscii("\n\n");
331     sbcopyright.append( copyrightAcknowledge );
332     maCopyrightTextStr = sbcopyright.makeStringAndClear();
333 
334     InitControls();
335 
336     // set links
337     maReadmeButton.SetClickHdl( LINK( this, AboutDialog, ShowReadme_Impl ) );
338     maCreditsLink.SetClickHdl( LINK( this, AboutDialog, OpenLinkHdl_Impl ) );
339 
340     FreeResource();
341 
342     SetHelpId( CMD_SID_ABOUT );
343 }
344 
345 // -----------------------------------------------------------------------
346 
347 AboutDialog::~AboutDialog()
348 {
349 }
350 
351 // -----------------------------------------------------------------------
352 
353 void AboutDialog::InitControls()
354 {
355     // apply font, background et al.
356     ApplyStyleSettings();
357 
358     // set strings
359     maCopyrightEdit.SetText( maCopyrightTextStr );
360     maBuildInfoEdit.SetText( GetBuildVersionString() );
361     maCreditsLink.SetURL( maCreditsLink.GetText() );
362 
363     // determine size and position of the dialog & elements
364     Size aDlgSize;
365     LayoutControls( aDlgSize );
366 
367     // Change the width of the dialog
368     SetOutputSizePixel( aDlgSize );
369 }
370 
371 // -----------------------------------------------------------------------
372 
373 void AboutDialog::ApplyStyleSettings()
374 {
375     // transparent font
376     Font aFont = GetFont();
377     aFont.SetTransparent( sal_True );
378     SetFont( aFont );
379 
380     // set for background and text the correct system color
381     const StyleSettings& rSettings = GetSettings().GetStyleSettings();
382     Color aWindowColor( rSettings.GetWindowColor() );
383     Wallpaper aWall( aWindowColor );
384     SetBackground( aWall );
385 
386     Font aNewFont( maCopyrightEdit.GetFont() );
387     aNewFont.SetTransparent( sal_True );
388 
389     maVersionText.SetFont( aNewFont );
390     maCopyrightEdit.SetFont( aNewFont );
391 
392     maVersionText.SetBackground(aWall);
393     maCopyrightEdit.SetBackground(aWall);
394     maBuildInfoEdit.SetBackground(aWall);
395     maCreditsLink.SetBackground(aWall);
396 
397     Color aTextColor( rSettings.GetWindowTextColor() );
398     maVersionText.SetControlForeground( aTextColor );
399     maCopyrightEdit.SetControlForeground( aTextColor );
400     maBuildInfoEdit.SetControlForeground( aTextColor );
401     maCreditsLink.SetControlForeground();
402 
403     Size aSmaller = aNewFont.GetSize();
404     aSmaller.Width() = (long) (aSmaller.Width() * 0.75);
405     aSmaller.Height() = (long) (aSmaller.Height() * 0.75);
406     aNewFont.SetSize( aSmaller );
407 
408     maBuildInfoEdit.SetFont( aNewFont );
409 
410     // the following is a hack to force the MultiLineEdit update its settings
411     // in order to reflect the Font
412     // See
413     //      Window::SetControlFont
414     //      MultiLineEdit::StateChanged
415     //      MultiLineEdit::ImplInitSettings
416     // TODO Override SetFont in MultiLineEdit and do the following,
417     // otherwise SetFont has no effect at all!
418     aSmaller = PixelToLogic( aSmaller, MAP_POINT );
419     aNewFont.SetSize( aSmaller );
420     maBuildInfoEdit.SetControlFont( aNewFont );
421 }
422 
423 // -----------------------------------------------------------------------
424 
425 void AboutDialog::LayoutControls( Size& aDlgSize )
426 {
427     Size aMainLogoSz = maMainLogo.GetSizePixel();
428     Size aAppLogoSiz = maAppLogo.GetSizePixel();
429 
430     aDlgSize = GetOutputSizePixel();
431     long nCol1 = aMainLogoSz.Width();
432     long nCol2 = aAppLogoSiz.Width() ? aAppLogoSiz.Width() : aDlgSize.Width();
433 
434     Size a6Size      = maVersionText.LogicToPixel( Size( 6, 6 ), MAP_APPFONT );
435     long nDlgMargin  = a6Size.Width() * 2;
436     long nCtrlMargin = a6Size.Height() * 2;
437     long nTextWidth  = nCol2 - nDlgMargin;
438     long nY          = aAppLogoSiz.Height() + a6Size.Height();
439 
440     aDlgSize.Width() = nCol1 + a6Size.Width() + nCol2;
441 
442     Point aPos( nCol1 + a6Size.Width(), nY );
443     Size aSize;
444     // layout fixed text control
445     lcl_layoutFixedText( maVersionText, aPos, aSize, nTextWidth );
446     nY += aSize.Height() + a6Size.Height();
447 
448     // Multiline edit with Build info
449     aPos.Y() = nY;
450     lcl_layoutEdit( maBuildInfoEdit, aPos, aSize, nTextWidth );
451     nY += aSize.Height() + a6Size.Height();
452 
453     // Multiline edit with Copyright-Text
454     aPos.Y() = nY;
455     lcl_layoutEdit( maCopyrightEdit, aPos, aSize, nTextWidth );
456     nY += aSize.Height() + a6Size.Height();
457 
458     // Hyperlink
459     aPos.Y() = nY;
460     lcl_layoutFixedText( maCreditsLink, aPos, aSize, nTextWidth );
461     nY += aSize.Height();
462 
463     nY = std::max( nY, aMainLogoSz.Height() );
464     nY += nCtrlMargin;
465 
466     // logos position
467     maMainLogoPos = Point( 0, nY / 2 - aMainLogoSz.Height() / 2 );
468     maAppLogoPos = Point( nCol1 + a6Size.Width(), 0 );
469 
470     // OK-Button-Position (at the bottom and centered)
471     Size aOKSiz = maOKButton.GetSizePixel();
472     Point aOKPnt( ( aDlgSize.Width() - aOKSiz.Width() ) - a6Size.Width(), nY );
473     maOKButton.SetPosPixel( aOKPnt );
474 
475     maReadmeButton.SetPosPixel( Point(a6Size.Width(), nY) );
476 
477     aDlgSize.Height() = aOKPnt.Y() + aOKSiz.Height() + a6Size.Width();
478 }
479 
480 // -----------------------------------------------------------------------
481 
482 const rtl::OUString AboutDialog::GetBuildId() const
483 {
484     rtl::OUString sDefault;
485 
486     // Get buildid from version[rc|.ini]
487     rtl::OUString sBuildId( utl::Bootstrap::getBuildIdData( sDefault ) );
488     OSL_ENSURE( sBuildId.getLength() > 0, "No BUILDID in bootstrap file" );
489     rtl::OUStringBuffer sBuildIdBuff( sBuildId );
490 
491     // Get ProductSource from version[rc|.ini]
492     rtl::OUString sProductSource( utl::Bootstrap::getProductSource( sDefault ) );
493     OSL_ENSURE( sProductSource.getLength() > 0, "No ProductSource in bootstrap file" );
494 
495     // the product source is something like "AOO340",
496     // while the build id is something like "340m1(Build:9590)"
497     // For better readability, strip the duplicate ProductMajor ("340").
498     if ( sProductSource.getLength() )
499     {
500         sal_Int32 nMajorLength = sProductSource.getLength() - 3;
501         bool bMatchingUPD =
502                 ( sProductSource.getLength() >= 3 )
503             &&  ( sBuildId.getLength() >= nMajorLength )
504             &&  ( sProductSource.copy( 3 ) == sBuildId.copy( 0, nMajorLength ) );
505         OSL_ENSURE( bMatchingUPD, "BUILDID and ProductSource do not match in their UPD" );
506         if ( bMatchingUPD )
507             sProductSource = sProductSource.copy( 0, sProductSource.getLength() - nMajorLength );
508 
509         // prepend the product source
510         sBuildIdBuff.insert( 0, sProductSource );
511     }
512 
513     return sBuildIdBuff.makeStringAndClear();
514 }
515 
516 // -----------------------------------------------------------------------
517 
518 const rtl::OUString AboutDialog::GetBuildVersionString() const
519 {
520     rtl::OUStringBuffer aBuildString( GetBuildId() );
521     rtl::OUString sRevision( utl::Bootstrap::getRevisionInfo() );
522 
523     if ( sRevision.getLength() > 0 )
524     {
525         aBuildString.appendAscii( RTL_CONSTASCII_STRINGPARAM( "  -  Rev. " ) );
526         aBuildString.append( sRevision );
527     }
528 
529 #ifdef BUILD_VER_STRING
530     rtl::OUString sBuildVer( RTL_CONSTASCII_USTRINGPARAM( STRINGIFY( BUILD_VER_STRING ) ) );
531     if ( sBuildVer.getLength() > 0 )
532     {
533         aBuildString.append( sal_Unicode( '\n' ) );
534         aBuildString.append( sBuildVer );
535     }
536 #endif
537 
538     return aBuildString.makeStringAndClear();
539 }
540 
541 // -----------------------------------------------------------------------
542 
543 sal_Bool AboutDialog::Close()
544 {
545     EndDialog( RET_OK );
546     return( sal_False );
547 }
548 
549 // -----------------------------------------------------------------------
550 
551 void AboutDialog::Paint( const Rectangle& rRect )
552 {
553     SetClipRegion( rRect );
554 
555     // workaround to ensure that the background is painted correct
556     // on MacOS for example the background was gray and the image and other controls white
557     SetFillColor(GetSettings().GetStyleSettings().GetWindowColor());
558     SetLineColor();
559     DrawRect(rRect);
560 
561     DrawImage( maMainLogoPos, maMainLogo );
562     DrawImage( maAppLogoPos, maAppLogo );
563 
564     return;
565 }
566 
567 // -----------------------------------------------------------------------
568 
569 IMPL_LINK ( AboutDialog, OpenLinkHdl_Impl, svt::FixedHyperlink*, EMPTYARG )
570 {
571     ::rtl::OUString sURL( maCreditsLink.GetURL() );
572     if ( sURL.getLength() > 0 )
573     {
574         try
575         {
576             uno::Reference< com::sun::star::system::XSystemShellExecute > xSystemShell(
577                 com::sun::star::system::SystemShellExecute::create(
578                     ::comphelper::getProcessComponentContext() ) );
579             if ( xSystemShell.is() )
580                 xSystemShell->execute( sURL, rtl::OUString(), com::sun::star::system::SystemShellExecuteFlags::DEFAULTS );
581         }
582         catch( const uno::Exception& e )
583         {
584             OSL_TRACE( "Caught exception: %s\n thread terminated.\n",
585                 rtl::OUStringToOString(e.Message, RTL_TEXTENCODING_UTF8).getStr());
586         }
587     }
588 
589     return 0;
590 }
591 
592 IMPL_LINK ( AboutDialog, ShowReadme_Impl, PushButton*, EMPTYARG )
593 {
594     ReadmeDialog aDlg( this );
595     aDlg.Execute();
596 
597     return 0;
598 }
599 
600 /* vim: set noet sw=4 ts=4: */
601