Re #7099. Adding hiding and showing columns to PeaksWorkspaceWidget.

This a step towards having the visible columns settable.

Code/Mantid/MantidQt/SliceViewer/inc/MantidQtSliceViewer/PeaksWorkspaceWidget.h

@@ -15,6 +15,8 @@ namespace SliceViewer
     Q_OBJECT
   public:
     PeaksWorkspaceWidget(Mantid::API::IPeaksWorkspace_const_sptr ws, const std::string& coordinateSystem, const QColor& defaultForegroundColour, const QColor& defaultBackgroundColour, QWidget *parent = 0);
+    std::set<QString> getShownColumns();
+    void setShownColumns(std::set<QString> & cols);
     virtual ~PeaksWorkspaceWidget();
   signals:
     void peakColourChanged(Mantid::API::IPeaksWorkspace_const_sptr, QColor);

Code/Mantid/MantidQt/SliceViewer/inc/MantidQtSliceViewer/QPeaksTableModel.h

@@ -71,6 +71,7 @@ namespace MantidQt
       typedef std::map<ColumnNameType, bool> ColumnNameSortableMap;
       typedef std::map<int, ColumnNameType> ColumnIndexNameMap;
 
+    public:
       /// Label for run number column
       static const QString RUNNUMBER;
       /// Label for detector id column
@@ -112,6 +113,7 @@ namespace MantidQt
       /// Label for Q-vector in the sample column
       static const QString QSAMPLE;
 
+    private:
       /// Index for run number column
       static const int COL_RUNNUMBER;
       /// Index for detector id column

Code/Mantid/MantidQt/SliceViewer/src/PeaksWorkspaceWidget.cpp

@@ -45,6 +45,30 @@ namespace MantidQt
       populate();
     }
 
+    std::set<QString> PeaksWorkspaceWidget::getShownColumns()
+    {
+
+      std::set<QString> result;
+      auto numCols = ui.tblPeaks->model()->columnCount();
+      for (auto i = 0; i < numCols; ++i)
+      {
+        if (!ui.tblPeaks->isColumnHidden(i))
+          result.insert(ui.tblPeaks->model()->headerData(i, Qt::Horizontal, Qt::DisplayRole).toString());
+      }
+      return result;
+    }
+
+    void PeaksWorkspaceWidget::setShownColumns(std::set<QString> & cols)
+    {
+      auto numCols = ui.tblPeaks->model()->columnCount();
+      for (auto i = 0; i < numCols; ++i)
+      {
+        const QString name = ui.tblPeaks->model()->headerData(i, Qt::Horizontal, Qt::DisplayRole).toString();
+        bool hide(cols.find(name) == cols.end());
+        ui.tblPeaks->setColumnHidden(i, hide);
+      }
+    }
+
     /**
     Populate controls with data ready for rendering.
     */