Compile time errors

src/mainwin.cc: In constructor ‘MainWindow::MainWindow(const QString&)’:
src/mainwin.cc:167:83: error: no matching function for call to ‘LegacyEditor::LegacyEditor()’
src/mainwin.cc:167:83: note: candidates are:
src/legacyeditor.h:17:2: note: LegacyEditor::LegacyEditor(QWidget*)
src/legacyeditor.h:17:2: note:   candidate expects 1 argument, 0 provided
src/legacyeditor.h:13:7: note: LegacyEditor::LegacyEditor(const LegacyEditor&)
src/legacyeditor.h:13:7: note:   candidate expects 1 argument, 0 provided
src/mainwin.cc:170:44: error: no match for call to ‘(LegacyEditor) (QWidget*&)’

legacyeditor.h

16 public: 
17 LegacyEditor(QWidget *parent);
18        ~LegacyEditor();

mainwin.cc

 166 MainWindow::MainWindow(const QString &filename)
 167         : root_inst("group"), font_list_dialog(NULL), tempFile(NULL), progresswidget(NULL)
 168 {
 169         //legacy = new LegacyEditor(editorDockContents);
 170         editor = &legacy(editorDockContents);
 171 

MainWindow.h

 LegacyEditor legacy;