Wt

After the widget is shown, setting the WFileUpload::setFilter will not alter the file browser dialog.

Code:

  WFileUpload* upload = new WFileUpload(this);
  upload->setFilters(".bad");
  upload->setFilters(".txt"); //< switch to .txt

  WComboBox* combo = new WComboBox(this);
  combo->addItem(".txt");
  combo->addItem(".img");
  combo->changed().connect(std::bind([combo, upload]()
  {
    if(combo->currentIndex() == 0)
    {
      Wt::log("info") << "choose .txt";
      upload->setFilters(".txt");
    }
    else if(combo->currentIndex() == 1)
    {
      Wt::log("info") << "choose .img";
      upload->setFilters(".img"); //< won't switch to .img
    }

  }));

Step to reproduce

1. Click at "Browse..." button.
   
2. Observe file dialog which should show "*.txt" option
   
3. Change the choice in WCombobox to ".img"
   
4. Observe file dialog

Result

The file dialog still shows "*.txt" option

Version

Wt github b8d3cdf9ee0b0bcc16bf9338681ffc9ab27a490b

Environment

Ubuntu 15.10 (FileManager: Nautilus), Windows 10