gpg4libre: Show error message when signing fails

Change-Id: I58f3febaaaaa225952e87ad3f092950ace37d15d
Reviewed-on: https://gerrit.libreoffice.org/39283Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>

include/vcl/msgbox.hxx

@@ -89,6 +89,7 @@ public:
 class VCL_DLLPUBLIC ErrorBox : public MessBox
 {
 public:
+                        ErrorBox( vcl::Window* pParent, const OUString& rMessage );
                         ErrorBox( vcl::Window* pParent, WinBits nStyle,
                                   const OUString& rMessage );
 

vcl/source/window/msgbox.cxx

@@ -416,6 +416,16 @@ Image WarningBox::GetStandardImage()
     return ImplGetSVData()->maWinData.maMsgBoxImgList[2];
 }
 
+ErrorBox::ErrorBox( vcl::Window* pParent, const OUString& rMessage ) :
+    MessBox( pParent, WB_OK | WB_DEF_OK, OUString(), rMessage )
+{
+    // Default Text is the display title from the application
+    if ( GetText().isEmpty() )
+        SetText( Application::GetDisplayName() );
+
+    SetImage( ErrorBox::GetStandardImage() );
+}
+
 ErrorBox::ErrorBox( vcl::Window* pParent, WinBits nStyle,
                     const OUString& rMessage ) :
     MessBox( pParent, nStyle, OUString(), rMessage )

xmlsecurity/source/dialogs/digitalsignaturesdialog.cxx

@@ -53,6 +53,7 @@
 #include "resourcemanager.hxx"
 
 #include <vcl/layout.hxx>
+#include <vcl/msgbox.hxx>
 #include <unotools/configitem.hxx>
 #include <comphelper/storagehelper.hxx>
 
@@ -434,6 +435,7 @@ IMPL_LINK_NOARG(DigitalSignaturesDialog, AddButtonHdl, Button*, void)
     catch ( uno::Exception& )
     {
         OSL_FAIL( "Exception while adding a signature!" );
+        ScopedVclPtrInstance<ErrorBox>(this, XsResId(STR_XMLSECDLG_SIGNING_FAILED))->Execute();
         // Don't keep invalid entries...
         ImplGetSignatureInformations(/*bUseTempStream=*/true, /*bCacheLastSignature=*/false);
         ImplFillSignaturesBox();

xmlsecurity/source/dialogs/digitalsignaturesdialog.hrc

@@ -26,6 +26,7 @@
 #define STR_XMLSECDLG_OLD_ODF_FORMAT     RID_DIGITALSIGNATUREDLG_START
 #define STR_XMLSECDLG_QUERY_REMOVEDOCSIGNBEFORESIGN (RID_DIGITALSIGNATUREDLG_START + 1)
 #define STR_XMLSECDLG_QUERY_REALLYREMOVE (RID_DIGITALSIGNATUREDLG_START + 2)
+#define STR_XMLSECDLG_SIGNING_FAILED (RID_DIGITALSIGNATUREDLG_START + 3)
 #endif
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

xmlsecurity/source/dialogs/digitalsignaturesdialog.src

@@ -40,4 +40,10 @@ String STR_XMLSECDLG_QUERY_REALLYREMOVE
     Text [ en-US ] = "Document signature cannot be restored, once removed.\n"
         "Do you really want to remove selected signature?";
 };
+
+String STR_XMLSECDLG_SIGNING_FAILED
+{
+    Text [ en-US ] = "An error occured while adding the signature.";
+};
+
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */