Fix regression. Changing dimension value caused an infinite loop.

ChangeLog.txt

@@ -1,5 +1,6 @@
 # Version 0.7.43 (unreleased)
 - Improve Windows installer. Avoid crashing on checking if a program is still running.
+- Fix regression. Changing dimension value caused an infinite loop.
 
 # Version 0.7.42 Jan 26, 2021
 - Fix export of pattern recipe.

src/app/valentina/mainwindow.cpp

@@ -3831,45 +3831,58 @@ void MainWindow::PatternChangesWereSaved(bool saved)
 //---------------------------------------------------------------------------------------------------------------------
 void MainWindow::DimensionABaseChanged()
 {
+    const qreal oldValue = m_currentDimensionA;
     m_currentDimensionA = dimensionA->currentData().toDouble();
 
-    const QList<MeasurementDimension_p> dimensions = m->Dimensions().values();
+    if (not VFuzzyComparePossibleNulls(oldValue, m_currentDimensionA))
-    if (dimensions.size() > 1)
     {
-        MeasurementDimension_p dimension = dimensions.at(1);
+        const QList<MeasurementDimension_p> dimensions = m->Dimensions().values();
-        InitDimensionGradation(1, dimension, dimensionB);
+        if (dimensions.size() > 1)
-
-        if (dimensions.size() > 2)
         {
-            dimension = dimensions.at(2);
+            MeasurementDimension_p dimension = dimensions.at(1);
-            InitDimensionGradation(2, dimension, dimensionC);
+            InitDimensionGradation(1, dimension, dimensionB);
-        }
-    }
 
-    m_gradation->start();
+            if (dimensions.size() > 2)
+            {
+                dimension = dimensions.at(2);
+                InitDimensionGradation(2, dimension, dimensionC);
+            }
+        }
+
+        m_gradation->start();
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 void MainWindow::DimensionBBaseChanged()
 {
+    const qreal oldValue = m_currentDimensionB;
     m_currentDimensionB = dimensionB->currentData().toDouble();
 
-    const QList<MeasurementDimension_p> dimensions = m->Dimensions().values();
+    if (not VFuzzyComparePossibleNulls(oldValue, m_currentDimensionB))
-
-    if (dimensions.size() > 2)
     {
-        MeasurementDimension_p dimension = dimensions.at(2);
+        const QList<MeasurementDimension_p> dimensions = m->Dimensions().values();
-        InitDimensionGradation(2, dimension, dimensionC);
-    }
 
-    m_gradation->start();
+        if (dimensions.size() > 2)
+        {
+            const MeasurementDimension_p& dimension = dimensions.at(2);
+            InitDimensionGradation(2, dimension, dimensionC);
+        }
+
+        m_gradation->start();
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 void MainWindow::DimensionCBaseChanged()
 {
+    const qreal oldValue = m_currentDimensionC;
     m_currentDimensionC = dimensionC->currentData().toDouble();
-    m_gradation->start();
+
+    if (not VFuzzyComparePossibleNulls(oldValue, m_currentDimensionC))
+    {
+        m_gradation->start();
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------