Re #8239. Remove unused undo stack code.

This is inherited code from qtiPlot that was disabled on our
side a long time ago. It provided undo functionality on matrices.

Code/Mantid/MantidPlot/src/ApplicationWindow.cpp

@@ -413,16 +413,6 @@ void ApplicationWindow::init(bool factorySettings, const QStringList& args)
   explorerSplitter->setSizes( splitterSizes << 45 << 45);
   explorerWindow->hide();
 
-  undoStackWindow = new QDockWidget(this);
-  undoStackWindow->setObjectName("undoStackWindow"); // this is needed for QMainWindow::restoreState()
-  undoStackWindow->setWindowTitle(tr("Undo Stack"));
-  addDockWidget(Qt::RightDockWidgetArea, undoStackWindow);
-
-  d_undo_view = new QUndoView(undoStackWindow);
-  d_undo_view->setCleanIcon(QIcon(getQPixmap("filesave_xpm")));
-  undoStackWindow->setWidget(d_undo_view);
-  undoStackWindow->hide();
-
   // Needs to be done after initialization of dock windows,
   // because we now use QDockWidget::toggleViewAction()
   createActions();
@@ -1120,7 +1110,6 @@ void ApplicationWindow::insertTranslatedStrings()
 
   explorerWindow->setWindowTitle(tr("Project Explorer"));
   logWindow->setWindowTitle(tr("Results Log"));
-  undoStackWindow->setWindowTitle(tr("Undo Stack"));
   displayBar->setWindowTitle(tr("Data Display"));
   plotTools->setWindowTitle(tr("Plot"));
   standardTools->setWindowTitle(tr("Standard Tools"));
@@ -1436,11 +1425,6 @@ void ApplicationWindow::customMenu(MdiSubWindow* w)
   // these use the same keyboard shortcut (Ctrl+Return) and should not be enabled at the same time
   actionTableRecalculate->setEnabled(false);
 
-  // clear undo stack view (in case window is not a matrix)
-  d_undo_view->setStack(0);
-  actionUndo->setEnabled(false);
-  actionRedo->setEnabled(false);
-
   if(w){
     actionPrintAllPlots->setEnabled(projectHas2DPlots());
     actionPrint->setEnabled(true);
@@ -1545,9 +1529,6 @@ void ApplicationWindow::customMenu(MdiSubWindow* w)
       matrixMenuAboutToShow();
       myMenuBar()->insertItem(tr("&Analysis"), analysisMenu);
       analysisMenuAboutToShow();
-      d_undo_view->setEmptyLabel(w->objectName() + ": " + tr("Empty Stack"));
-      QUndoStack *stack = dynamic_cast<Matrix *>(w)->undoStack();
-      d_undo_view->setStack(stack);
 
     } else if (w->isA("Note")) {
       actionSaveTemplate->setEnabled(false);
@@ -12726,8 +12707,6 @@ void ApplicationWindow::createActions()
   actionShowLog = logWindow->toggleViewAction();
   actionShowLog->setIcon(getQPixmap("log_xpm"));
 
-  actionShowUndoStack = undoStackWindow->toggleViewAction();
-
   actionAddLayer = new QAction(QIcon(getQPixmap("newLayer_xpm")), tr("Add La&yer"), this);
   actionAddLayer->setShortcut( tr("Alt+L") );
   connect(actionAddLayer, SIGNAL(activated()), this, SLOT(addLayer()));
@@ -13566,9 +13545,6 @@ void ApplicationWindow::translateActionsStrings()
   actionShowLog->setMenuText(tr("Results &Log"));
   actionShowLog->setToolTip(tr("Results Log"));
 
-  actionShowUndoStack->setMenuText(tr("&Undo/Redo Stack"));
-  actionShowUndoStack->setToolTip(tr("Show available undo/redo commands"));
-
 #ifdef SCRIPTING_PYTHON
   actionShowScriptWindow->setMenuText(tr("&Script Window"));
   actionShowScriptWindow->setToolTip(tr("Script Window"));

Code/Mantid/MantidPlot/src/ApplicationWindow.h

@@ -1375,7 +1375,7 @@ public slots:
   ScriptingWindow *scriptingWindow; //Mantid
   Script *m_iface_script;
   QTranslator *appTranslator, *qtTranslator;
-  QDockWidget *explorerWindow, *undoStackWindow;
+  QDockWidget *explorerWindow;
   MantidQt::MantidWidgets::MessageDisplay *resultsLog;
   QMdiArea *d_workspace;
 
@@ -1462,7 +1462,6 @@ public slots:
   QAction *Box, *Frame, *None;
   QAction *front, *back, *right, *left, *ceil, *floor, *floordata, *flooriso, *floornone;
   QAction *wireframe, *hiddenline, *polygon, *filledmesh, *pointstyle, *barstyle, *conestyle, *crossHairStyle;
-  QAction *actionShowUndoStack;
   QActionGroup *coord, *floorstyle, *grids, *plotstyle, *dataTools;
   QAction *actionPanPlot;
   QAction *actionWaterfallPlot;
@@ -1472,7 +1471,6 @@ public slots:
 
   QList<QAction *> m_interfaceActions;
 
-  QUndoView *d_undo_view;
   /// list of mantidmatrix windows opened from project file.
   QList<MantidMatrix*> m_mantidmatrixWindows;