Gui: support of range checks in DlgExpressionInput

src/Gui/DlgExpressionInput.h

@@ -46,6 +46,19 @@ namespace Gui {
 
 namespace Dialog {
 
+class GuiExport NumberRange
+{
+public:
+    void setRange(double minimum, double maximum);
+    void clearRange();
+    void throwIfOutOfRange(const Base::Quantity&) const;
+
+private:
+    double minimum{};
+    double maximum{};
+    bool defined{false};
+};
+
 class GuiExport DlgExpressionInput : public QDialog
 {
     Q_OBJECT
@@ -54,6 +67,8 @@ public:
     explicit DlgExpressionInput(const App::ObjectIdentifier & _path, std::shared_ptr<const App::Expression> _expression, const Base::Unit &_impliedUnit, QWidget *parent = nullptr);
     ~DlgExpressionInput() override;
 
+    void setRange(double minimum, double maximum);
+    void clearRange();
     std::shared_ptr<App::Expression> getExpression() const { return expression; }
 
     bool discardedFormula() const { return discarded; }
@@ -81,6 +96,7 @@ private:
     App::ObjectIdentifier path;
     bool discarded;
     const Base::Unit impliedUnit;
+    NumberRange numberRange;
 
     int minimumWidth;
 };