From d3b228df25e848be4f6d8b06c23eaa3a5e0d8874 Mon Sep 17 00:00:00 2001
From: Roman Telezhynskyi <kroluku@gmail.com>
Date: Sat, 23 May 2015 18:37:55 +0300
Subject: [PATCH] Enable redo/undo actions if stack is not empty.

--HG--
branch : develop
---
 src/app/mainwindow.cpp | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/app/mainwindow.cpp b/src/app/mainwindow.cpp
index ceb408544..788004b4b 100644
--- a/src/app/mainwindow.cpp
+++ b/src/app/mainwindow.cpp
@@ -1233,8 +1233,14 @@ void MainWindow::ActionDraw(bool checked)
         ui->actionArrowTool->setEnabled(true);
         ui->actionShowCurveDetails->setEnabled(true);
         actionDockWidgetToolOptions->setEnabled(true);
-        undoAction->setEnabled(true);
-        redoAction->setEnabled(true);
+        if (qApp->getUndoStack()->canUndo())
+        {
+            undoAction->setEnabled(true);
+        }
+        if (qApp->getUndoStack()->canRedo())
+        {
+            redoAction->setEnabled(true);
+        }
 
         if (qApp->patternType() == MeasurementsType::Standard)
         {
@@ -1290,8 +1296,14 @@ void MainWindow::ActionDetails(bool checked)
         ui->actionArrowTool->setEnabled(true);
         ui->actionShowCurveDetails->setEnabled(false);
         actionDockWidgetToolOptions->setEnabled(true);
-        undoAction->setEnabled(true);
-        redoAction->setEnabled(true);
+        if (qApp->getUndoStack()->canUndo())
+        {
+            undoAction->setEnabled(true);
+        }
+        if (qApp->getUndoStack()->canRedo())
+        {
+            redoAction->setEnabled(true);
+        }
 
         if (qApp->patternType() == MeasurementsType::Standard)
         {