Add menu entries for undo/redo

Add an edit menu with undo and redo submenus, and connect them to
the UndoBuffer class. The submenus are only enabled when needed.

Signed-off-by: Grace Karanja <gracie.karanja89@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/qt-ui/mainwindow.cpp b/qt-ui/mainwindow.cpp
index 3142f5a82..57af5e091 100644
--- a/qt-ui/mainwindow.cpp
+++ b/qt-ui/mainwindow.cpp
@@ -31,6 +31,7 @@
 #include "usermanual.h"
 #endif
 #include <QNetworkProxy>
+#include "undobuffer.h"
 
 MainWindow *MainWindow::m_Instance = NULL;
 
@@ -77,6 +78,7 @@ MainWindow::MainWindow() : QMainWindow(),
 	connect(DivePlannerPointsModel::instance(), SIGNAL(planCreated()), this, SLOT(planCreated()));
 	connect(DivePlannerPointsModel::instance(), SIGNAL(planCanceled()), this, SLOT(planCanceled()));
 	connect(ui.printPlan, SIGNAL(pressed()), ui.divePlannerWidget, SLOT(printDecoPlan()));
+	connect(ui.menu_Edit, SIGNAL(aboutToShow()), this, SLOT(checkForUndoAndRedo()));
 #ifdef NO_PRINTING
 	ui.printPlan->hide();
 #endif
@@ -152,6 +154,7 @@ MainWindow::MainWindow() : QMainWindow(),
 	toolBar->setContentsMargins(zeroMargins);
 
 	updateManager = new UpdateManager(this);
+	undoBuffer = new UndoBuffer(this);
 }
 
 MainWindow::~MainWindow()
@@ -1466,3 +1469,19 @@ void MainWindow::on_actionFilterTags_triggered()
 	else
 		ui.multiFilter->setVisible(true);
 }
+
+void MainWindow::on_action_Undo_triggered()
+{
+	undoBuffer->undo();
+}
+
+void MainWindow::on_action_Redo_triggered()
+{
+	undoBuffer->redo();
+}
+
+void MainWindow::checkForUndoAndRedo()
+{
+	ui.action_Undo->setEnabled(undoBuffer->canUndo());
+	ui.action_Redo->setEnabled(undoBuffer->canRedo());
+}