ENH: Add method to check if double-spinbox value is being edited

Libs/Widgets/ctkDoubleSpinBox.cpp

@@ -37,6 +37,9 @@
 #include <QStyleOptionSpinBox>
 #include <QVariant>
 
+//------------------------------------------------------------------------------
+CTK_GET_CPP(ctkDoubleSpinBox, bool, isSettingValue, IsSettingValue)
+
 //-----------------------------------------------------------------------------
 // ctkQDoubleSpinBox
 //----------------------------------------------------------------------------
@@ -187,6 +190,7 @@ ctkDoubleSpinBoxPrivate::ctkDoubleSpinBoxPrivate(ctkDoubleSpinBox& object)
   this->InputRange[0] = 0.;
   this->InputRange[1] = 99.99;
   this->ForceInputValueUpdate = false;
+  this->IsSettingValue = false;
 }
 
 //-----------------------------------------------------------------------------
@@ -285,6 +289,8 @@ int ctkDoubleSpinBoxPrivate::decimalsForValue(double value) const
 void ctkDoubleSpinBoxPrivate::setValue(double value, int dec)
 {
   Q_Q(ctkDoubleSpinBox);
+  bool wasSettingValue = this->IsSettingValue;
+  this->IsSettingValue = true;
   dec = this->boundDecimals(dec);
   const bool changeDecimals = dec != q->decimals();
   if (changeDecimals)
@@ -316,6 +322,7 @@ void ctkDoubleSpinBoxPrivate::setValue(double value, int dec)
     this->CachedMinimumSizeHint = QSize();
     q->updateGeometry();
   }
+  this->IsSettingValue = wasSettingValue;
 }
 
 //-----------------------------------------------------------------------------

Libs/Widgets/ctkDoubleSpinBox.h

@@ -89,6 +89,9 @@ class CTK_WIDGETS_EXPORT ctkDoubleSpinBox : public QWidget
   /// SizeHintByMinMax by default
   /// SizeHintPolicy, sizeHintPolicy(), setSizeHintPolicy()
   Q_PROPERTY(SizeHintPolicy sizeHintPolicy READ sizeHintPolicy WRITE setSizeHintPolicy)
+  /// This property is true while the spinbox is setting a value.
+  /// \sa isSettingValue()
+  Q_PROPERTY(bool isSettingValue READ isSettingValue)
 
 public:
 
@@ -319,6 +322,14 @@ public Q_SLOTS:
   /// \sa isReadOnly
   void setReadOnly(bool readOnly);
 
+  /// Return true if the spinbox is in the progress of setting a value.
+  ///
+  /// Setting of value is performed in two steps: first the value is set in the spinbox
+  /// and then the valueChanged and decimalsChanged signals are emitted.
+  /// During this entire time, isSettingValue() returns true, because in some cases
+  /// it is important to know which of the sibling widgets initiated an update.
+  bool isSettingValue()const;
+
 Q_SIGNALS:
   /// Emitted every time the spinbox value is modified
   /// \sa QDoubleSpinBox::valueChanged()

Libs/Widgets/ctkDoubleSpinBox_p.h

@@ -101,6 +101,8 @@ class ctkDoubleSpinBoxPrivate: public QObject
   mutable QSize CachedMinimumSizeHint;
   bool ForceInputValueUpdate;
 
+  bool IsSettingValue;
+
   QPointer<ctkValueProxy> Proxy;
 
   void init();

Libs/Widgets/ctkSliderWidget.cpp

@@ -738,3 +738,10 @@ void ctkSliderWidget::onValueProxyModified()
   d->SpinBox->setValue(d->Slider->value());
   Q_ASSERT(d->equal(d->SpinBox->value(),d->Slider->value()));
 }
+
+// --------------------------------------------------------------------------
+bool ctkSliderWidget::isSettingValueFromSpinBox()const
+{
+  Q_D(const ctkSliderWidget);
+  return d->SpinBox->isSettingValue();
+}

Libs/Widgets/ctkSliderWidget.h

@@ -265,6 +265,9 @@ class CTK_WIDGETS_EXPORT ctkSliderWidget : public QWidget
   virtual void setValueProxy(ctkValueProxy* proxy);
   virtual ctkValueProxy* valueProxy() const;
 
+  /// Return true if a value is currently being set in the spinbox.
+  bool isSettingValueFromSpinBox()const;
+
 public Q_SLOTS:
   ///
   /// Reset the slider and spinbox to zero (value and position)