set up the gui for loading file

refs #17274

MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/EnggDiffraction/EnggDiffFittingViewQtWidget.h

@@ -180,6 +180,7 @@ private slots:
   void setBankIdComboBox(int idx) override;
   void setPeakPick();
   void clearPeakList();
+  void loadClicked();
   void fitClicked();
   void fitAllClicked();
   void FittingRunNo();

MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/EnggDiffraction/EnggDiffractionQtTabFitting.ui

@@ -68,6 +68,13 @@
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="QPushButton" name="pushButton_load">
+          <property name="text">
+           <string>Load</string>
+          </property>
+         </widget>
+        </item>
        </layout>
       </item>
       <item row="4" column="0">

MantidQt/CustomInterfaces/inc/MantidQtCustomInterfaces/EnggDiffraction/IEnggDiffFittingPresenter.h

@@ -44,6 +44,7 @@ public:
   enum Notification {
     Start,        ///< Start and setup interface
     FittingRunNo, ///< Creates widgets and handles multi/run numbers
+    Load,         ///< Load the focused file to the canvas
     FitPeaks,     ///< Preforms single peak fits
     FitAllPeaks,  ///< Preforms multiple runs in sequence single peak fits
     addPeaks,     ///< Adds peak to the list

MantidQt/CustomInterfaces/src/EnggDiffraction/EnggDiffFittingViewQtWidget.cpp

@@ -103,6 +103,8 @@ void EnggDiffFittingViewQtWidget::doSetup() {
   connect(m_ui.pushButton_fitting_browse_peaks, SIGNAL(released()), this,
           SLOT(browseClicked()));
 
+  connect(m_ui.pushButton_load, SIGNAL(released()), this, SLOT(loadClicked()));
+
   connect(m_ui.pushButton_fit, SIGNAL(released()), this, SLOT(fitClicked()));
 
   connect(m_ui.pushButton_fit_all, SIGNAL(released()), this,
@@ -171,6 +173,7 @@ void EnggDiffFittingViewQtWidget::saveSettings() const {
 
 void EnggDiffFittingViewQtWidget::enable(bool enable) {
   m_ui.pushButton_fitting_browse_run_num->setEnabled(enable);
+  m_ui.pushButton_load->setEnabled(enable);
   m_ui.lineEdit_pushButton_run_num->setEnabled(enable);
   m_ui.pushButton_fitting_browse_peaks->setEnabled(enable);
   m_ui.lineEdit_fitting_peaks->setEnabled(enable);
@@ -214,6 +217,10 @@ EnggDiffFittingViewQtWidget::enggRunPythonCode(const std::string &pyCode) {
   return m_mainPythonRunner->enggRunPythonCode(pyCode);
 }
 
+void EnggDiffFittingViewQtWidget::loadClicked() {
+  m_presenter->notify(IEnggDiffFittingPresenter::Load);
+}
+
 void EnggDiffFittingViewQtWidget::fitClicked() {
   m_presenter->notify(IEnggDiffFittingPresenter::FitPeaks);
 }