Fixed issue #913. Unable to save changes for piece path if it doesn't contain a

point.
(grafted from 0cf04b80083754dc5ed7e54ed95be63b97a7503a)

--HG--
branch : develop

ChangeLog.txt

@@ -9,6 +9,7 @@
 - [#905] Valentina crashes with error: This id is not unique.
 - [#909] Valentina produces wrong united path.
 - [#912] Labels in inactive state return to initial color.
+- [#913] Unable to save changes for piece path if it doesn't contain a point.
 
 # Version 0.6.1 October 23, 2018
 - [#885] Regression. Broken support for multi size measurements.

src/libs/vtools/dialogs/tools/piece/dialogpiecepath.cpp

@@ -748,6 +748,8 @@ void DialogPiecePath::EvalWidth()
 void DialogPiecePath::EvalWidthBefore()
 {
     labelEditFormula = ui->labelEditBefore;
+    if (ui->comboBoxNodes->count() > 0)
+    {
         const QString postfix = UnitsToStr(qApp->patternUnit(), true);
         QString formula = ui->plainTextEditFormulaWidthBefore->toPlainText();
         Eval(formula, m_flagFormulaBefore, ui->labelResultBefore, postfix, false, true);
@@ -760,11 +762,20 @@ void DialogPiecePath::EvalWidthBefore()
 
         UpdateNodeSABefore(formula);
     }
+    else
+    {
+        ChangeColor(labelEditFormula, okColor);
+        ui->labelResultBefore->setText(tr("<Empty>"));
+        m_flagFormulaBefore = true;
+    }
+}
 
 //---------------------------------------------------------------------------------------------------------------------
 void DialogPiecePath::EvalWidthAfter()
 {
     labelEditFormula = ui->labelEditAfter;
+    if (ui->comboBoxNodes->count() > 0)
+    {
         const QString postfix = UnitsToStr(qApp->patternUnit(), true);
         QString formula = ui->plainTextEditFormulaWidthAfter->toPlainText();
         Eval(formula, m_flagFormulaAfter, ui->labelResultAfter, postfix, false, true);
@@ -777,6 +788,13 @@ void DialogPiecePath::EvalWidthAfter()
 
         UpdateNodeSAAfter(formula);
     }
+    else
+    {
+        ChangeColor(labelEditFormula, okColor);
+        ui->labelResultAfter->setText(tr("<Empty>"));
+        m_flagFormulaAfter = true;
+    }
+}
 
 //---------------------------------------------------------------------------------------------------------------------
 void DialogPiecePath::EvalVisible()

src/libs/vtools/dialogs/tools/piece/dialogseamallowance.cpp

@@ -2079,6 +2079,8 @@ void DialogSeamAllowance::EvalWidthBefore()
     if (uiTabPaths->checkBoxSeams->isChecked())
     {
         labelEditFormula = uiTabPaths->labelEditBefore;
+        if (uiTabPaths->comboBoxNodes->count() > 0)
+        {
             const QString postfix = UnitsToStr(qApp->patternUnit(), true);
             const QString formula = uiTabPaths->plainTextEditFormulaWidthBefore->toPlainText();
             Eval(formula, flagFormulaBefore, uiTabPaths->labelResultBefore, postfix, false, true);
@@ -2087,6 +2089,13 @@ void DialogSeamAllowance::EvalWidthBefore()
             UpdateNodeSABefore(formulaSABefore);
             EnableDefButton(uiTabPaths->pushButtonDefBefore, formulaSABefore);
         }
+        else
+        {
+            ChangeColor(labelEditFormula, okColor);
+            uiTabPaths->labelResultBefore->setText(tr("<Empty>"));
+            flagFormulaBefore = true;
+        }
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -2095,6 +2104,8 @@ void DialogSeamAllowance::EvalWidthAfter()
     if (uiTabPaths->checkBoxSeams->isChecked())
     {
         labelEditFormula = uiTabPaths->labelEditAfter;
+        if (uiTabPaths->comboBoxNodes->count() > 0)
+        {
             const QString postfix = UnitsToStr(qApp->patternUnit(), true);
             const QString formula = uiTabPaths->plainTextEditFormulaWidthAfter->toPlainText();
             Eval(formula, flagFormulaAfter, uiTabPaths->labelResultAfter, postfix, false, true);
@@ -2103,6 +2114,13 @@ void DialogSeamAllowance::EvalWidthAfter()
             UpdateNodeSAAfter(formulaSAAfter);
             EnableDefButton(uiTabPaths->pushButtonDefAfter, formulaSAAfter);
         }
+        else
+        {
+            ChangeColor(labelEditFormula, okColor);
+            uiTabPaths->labelResultAfter->setText(tr("<Empty>"));
+            flagFormulaAfter = true;
+        }
+    }
 }
 
 //---------------------------------------------------------------------------------------------------------------------