Refs #6352. Method to switch peak coordinates in SplatterPlot view.

Code/Mantid/Vates/VatesSimpleGui/ViewWidgets/inc/MantidVatesSimpleGuiViewWidgets/SplatterPlotView.h

@@ -91,6 +91,8 @@ public slots:
   void checkPeaksCoordinates();
 
 protected slots:
+  /// Check state of toggle button with respect to peak coordinates.
+  void onOverridePeakCoordToggled(bool state);
   /**
    * Create and apply a threshold filter to the data.
    */

Code/Mantid/Vates/VatesSimpleGui/ViewWidgets/inc/MantidVatesSimpleGuiViewWidgets/SplatterPlotView.ui

@@ -36,6 +36,19 @@
        </property>
       </widget>
      </item>
+     <item>
+      <widget class="QPushButton" name="overridePeakCoordsButton">
+       <property name="toolTip">
+        <string>Override the peak coordinates instead of matching them to the MD workspace</string>
+       </property>
+       <property name="text">
+        <string>Override PC</string>
+       </property>
+       <property name="checkable">
+        <bool>true</bool>
+       </property>
+      </widget>
+     </item>
      <item>
       <spacer name="horizontalSpacer_2">
        <property name="orientation">

Code/Mantid/Vates/VatesSimpleGui/ViewWidgets/src/SplatterPlotView.cpp

@@ -30,6 +30,12 @@ SplatterPlotView::SplatterPlotView(QWidget *parent) : ViewBase(parent)
   QObject::connect(this->ui.thresholdButton, SIGNAL(clicked()),
                    this, SLOT(onThresholdButtonClicked()));
 
+  // Set connection to toggle button for peak coordinate checking
+  QObject::connect(this->ui.overridePeakCoordsButton,
+                   SIGNAL(toggled(bool)),
+                   this,
+                   SLOT(onOverridePeakCoordToggled(bool)));
+
   this->view = this->createRenderView(this->ui.renderFrame);
 }
 
@@ -130,9 +136,25 @@ void SplatterPlotView::resetDisplay()
   this->view->resetDisplay();
 }
 
+/**
+ * This function checks to see if the Override PC button has been
+ * toggled. If the state is unchecked (false), we want to make sure
+ * that the coordniates are matched back to the MD workspace.
+ * @param state : true is button is checked, false if not
+ */
+void SplatterPlotView::onOverridePeakCoordToggled(bool state)
+{
+  if (!state)
+  {
+    this->checkPeaksCoordinates();
+    emit this->triggerAccept();
+  }
+}
+
 void SplatterPlotView::checkPeaksCoordinates()
 {
-  if (!this->peaksSource.isEmpty())
+  if (!this->peaksSource.isEmpty() &&
+      !this->ui.overridePeakCoordsButton->isChecked())
   {
     int peakViewCoords = vtkSMPropertyHelper(this->origSrc->getProxy(),
                                              "SpecialCoordinates").GetAsInt();