Update range and values of ctkVTKScalarsToColorsWidget

In some scenarii, the axes limits and values were changed at once, so when
the range slider range was updated, the slider value was not up to date.

Libs/Visualization/VTK/Widgets/ctkVTKScalarsToColorsWidget.cpp

@@ -205,14 +205,7 @@ void ctkVTKScalarsToColorsWidget::onPlotAdded(vtkPlot* plot)
 // ----------------------------------------------------------------------------
 void ctkVTKScalarsToColorsWidget::onBoundsChanged()
 {
-  Q_D(ctkVTKScalarsToColorsWidget);
-  double bounds[8];
-  d->View->chartBounds(bounds);
-  /// The bounds have already been set to the axes in ctkVTKChartView::boundAxesToChartBounds()
-  d->XRangeSlider->setRange(bounds[vtkAxis::BOTTOM * 2],
-                            bounds[vtkAxis::BOTTOM * 2 + 1]);
-  d->YRangeSlider->setRange(bounds[vtkAxis::LEFT * 2],
-                            bounds[vtkAxis::LEFT * 2 + 1]);
+  this->onAxesModified();
 }
 
 // ----------------------------------------------------------------------------
@@ -466,11 +459,18 @@ void ctkVTKScalarsToColorsWidget::onAxesModified()
   vtkAxis* xAxis = d->CurrentControlPointsItem ?
     d->CurrentControlPointsItem->GetXAxis() : d->View->chart()->GetAxis(vtkAxis::BOTTOM);
   Q_ASSERT(xAxis);
+
+  bool wasBlocking = d->XRangeSlider->blockSignals(true);
+  d->XRangeSlider->setRange(xAxis->GetMinimumLimit(), xAxis->GetMaximumLimit());
   d->XRangeSlider->setValues(xAxis->GetMinimum(), xAxis->GetMaximum());
+  d->XRangeSlider->blockSignals(wasBlocking);
+
   vtkAxis* yAxis = d->CurrentControlPointsItem ?
     d->CurrentControlPointsItem->GetYAxis() : d->View->chart()->GetAxis(vtkAxis::LEFT);
   Q_ASSERT(yAxis);
+
+  wasBlocking = d->YRangeSlider->blockSignals(true);
+  d->YRangeSlider->setRange(yAxis->GetMinimumLimit(), yAxis->GetMaximumLimit());
   d->YRangeSlider->setValues(yAxis->GetMinimum(), yAxis->GetMaximum());
-  //  d->View->scene()->SetDirty(true);
-  //emit this->axesModified();
+  d->YRangeSlider->blockSignals(wasBlocking);
 }