Wt

I'll make a small test case and see if I can reproduce it.

This is a simple test for the WTableView.

(see attached image)

Not sure what I'm missing here, this just started after upgrading Wt. I replaced the wt 'resources' folder in my project, so that is updated as well..

   136  auto
   137  test()-> void
   138  {
   139    auto model = std::make_shared< Wt::WStandardItemModel >();
   140    for( int row = 0; row< 3; row++ )
   141    {
   142      std::vector< std::unique_ptr< Wt::WStandardItem > > rowset;
   143      for( int col = 0; col< 3; col++ )
   144      {
   145        auto item = std::make_unique< Wt::WStandardItem >( Wt::WString("row{1} col{2}").arg( row ).arg( col) );
   146        rowset.push_back( std::move( item ) );
   147      }
   148  
   149      model-> appendRow( std::move( rowset ) );
   150    }
   151  
   152    auto tableView = std::make_unique< Wt::WTableView >();
   153    tableView-> setSelectionBehavior    ( Wt::SelectionBehavior::Items );
   154  //  tableView-> setSelectionBehavior    ( Wt::SelectionBehavior::Rows  );
   155  //  tableView-> setSelectionMode        ( Wt::SelectionMode::Single    );
   156    tableView-> setSelectionMode        ( Wt::SelectionMode::Extended  );
   157    tableView-> setColumnResizeEnabled  ( false                        );
   158    tableView-> setAlternatingRowColors ( true                         );
   159    tableView-> setModel                ( model                        );
   160  
   161    Wt::WDialog dialog( "test" );
   162    dialog.contents()-> addWidget( std::move( tableView ) );
   163    dialog.rejectWhenEscapePressed( true );
   164    dialog.setClosable( true );
   165    dialog.exec();
   166  
   167  } // endtest()-> void

Sorry for the noise... this appears to be a problem on my end. Not sure what's going on, but on one PC, any browser, Chrome, FF, I cannot click in the table. Even from a VM on that PC it won't work. But, when I access from just a different box, it works, I can click and select rows... Very odd! If I figure it out, I'll post back here.

Hmm, well, in my app, WTableView selection doesn't work! When I build a simple test within my app, it still doesn't work. When I move that simple test case to its own stand-alone app, it works without any problems!

So, I'm confused what has cropped up in my app that preventing WTableView Selection?

Ugh!

Ok, found it!

Yes, it was due to Wt upgrade, but the problem was due to having an older-version 'resources' folder. Finally got that properly swapped, all fixed!

Sorry for the noise.

Interesting result... I have further investigation to do;

1. compile with Wt-4.10 no problem
2. compile with Wt-4.11 will not compile with error below
3. compile with Wt-master, WTableView will not allow 'select' anything

I verified this with a docker container of Wt, so I can quickly swap out Wt versions and test (thank you Roel)

This is the error that gets thrown on compile from 4.11;

                 from src/Gui/CentralWidget.cpp:8:
/opt/Wt4/include/Wt/WToolBar.h: In instantiation of 'Widget* Wt::WToolBar::addWidget(std::unique_ptr<_Tp>, Wt::AlignmentFlag) [with Widget = Wt::WLineEdit]':
src/Gui/RawTableWidget_impl.h:30:24:   required from 'GCW::Gui::RawTableWidget<C>::RawTableWidget(const string&) [with C = GCW::Dbo::Accounts::Item; std::string = std::__cxx11::basic_string<char>]'
/usr/include/c++/11/bits/unique_ptr.h:962:30:   required from 'typename std::_MakeUniq<_Tp>::__single_object std::make_unique(_Args&& ...) [with _Tp = GCW::Gui::RawTableWidget<GCW::Dbo::Accounts::Item>; _Args = {const char (&)[9]}; typename std::_MakeUniq<_Tp>::__single_object = std::unique_ptr<GCW::Gui::RawTableWidget<GCW::Dbo::Accounts::Item>, std::default_delete<GCW::Gui::RawTableWidget<GCW::Dbo::Accounts::Item> > >]'
src/Gui/CentralWidget.cpp:386:105:   required from here
/opt/Wt4/include/Wt/WToolBar.h:75:20: error: no matching function for call to 'std::unique_ptr<Wt::WWidget>::unique_ptr(std::remove_reference<std::unique_ptr<Wt::WLineEdit>&>::type, Wt::AlignmentFlag&)'
   75 |     addWidget(std::unique_ptr<WWidget>(std::move(widget), alignmentFlag));
      |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated due to -Wfatal-errors.

This is the code that compiles fine in Wt-4.11 and also compiles fine in Wt-master;

   386      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Accounts     ::Item > >( "accounts"     ), "accounts"     );
   387  #ifdef NEVER
   388      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Books        ::Item > >( "books"        ), "books"        );
   389      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: BillTerms    ::Item > >( "billterms"    ), "billterms"    );
   390      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Commodities  ::Item > >( "commodities"  ), "commodities"  );
   391      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Customers    ::Item > >( "customers"    ), "customers"    );
   392      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Entries      ::Item > >( "entries"      ), "entries"      );
   393      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: GncLock      ::Item > >( "gnclock"      ), "gnclock"      );
   394      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Invoices     ::Item > >( "invoices"     ), "invoices"     );
   395      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Slots        ::Item > >( "slots"        ), "slots"        );
   396      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Splits       ::Item > >( "splits"       ), "splits"       );
   397      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Transactions ::Item > >( "transactions" ), "transactions" );
   398      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Vars         ::Item > >( "vars"         ), "vars"         );
   399      tw-> addTab( std::make_unique< GCW::Gui::RawTableWidget< typename GCW::Dbo:: Versions     ::Item > >( "versions"     ), "versions"     );
   400  #endif
   401  

So, this really has my curiosity piqued now! I'm going to dig a little deeper and see what I can understand.

Thank you for listening. I'll be here all week :)

~mark

Hey Mark,

the compilation error was due to a an additional shorthand for addWidget being implemented that returned the raw pointer to the widget. However, as you can see, the closing bracket after the std::move is badly positioned, taking the alignmentFlag into the WWidget ctor.
While it should be a parameter of addWidget. A silly oversight.

But if I understand it correctly, you are still not able to select WTableView entries, even after replacing the resources directory (per your 3rd point)?

Best,
Matthias

Hi Matthias,

Yes, in wt-master I seem to be unable to select anything in a WTableView.

I'm still researching this. I built a small test case that did not seem to exhibit this problem, and now I'm working on my app to test this thoroughly and I'm getting mixed results - I could select rows, and then I couldn't. It seems very app related, but I cannot right now see it, and the fact that it reveals itself from a version change seems odd. Seems Wt related, but also something clearly in my code is aggravating this situation.

In my app, in one condition, I can select rows in my tables, and then when my app take a different direction, then I cannot select rows in the WTableViews. Seems app related, right? But, if I compile down to 4.10, then this situation does not arise at all... seems Wt related, right?

Color me confused! As soon as I have something conclusive I'll send it along.

Thanks for checking in!

~mark

Hi Matthias,

Yea, this is really strange.

Here is a link to a page that is exhibiting the issue. This same application compiles with 4.10 and works without any issues;

https://gnucashew.lorimarksolutions.com/demo

If you want to see if you can see anything in the DOM go for it.

I'm still analyzing things, I'm very curious about this issue.

Thank you,

~mark

Oh... if you go to that page, there's a 'button' called 'devtest', and that will open a simple table for testing.

Ok, here's a twist...

On that demo site, I can poke around, click on things, open 'help', 'properties', various reports and things. Just poking around. Still cannot select items in the WTableView.

But, then, all of a sudden, without warning, without indication... suddenly... I can click and select things!

Again, this doesn't happen in 4.10, 4.11... just 'master'.

Very strange!

Still studying.