[apps/calculation] Reinitiate the scrolling when reloading the pretty

print view

Change-Id: I1975e46cc63109d47223018ca0e09bdc40274573

apps/calculation/history_view_cell.cpp

@@ -54,6 +54,7 @@ void HistoryViewCell::reloadCell() {
     m_result.setBackgroundColor(Palette::CellBackgroundColor);
     m_prettyPrint.setBackgroundColor(backgroundColor);
   }
+  m_prettyPrint.reloadCell();
   TableViewCell::reloadCell();
   layoutSubviews();
 }

apps/calculation/pretty_print_view.cpp

@@ -34,6 +34,10 @@ KDSize PrettyPrintView::minimalSizeForOptimalDisplay() {
   return m_expressionView.minimalSizeForOptimalDisplay();
 }
 
+void PrettyPrintView::reloadCell() {
+  setContentOffset({0, 0});
+}
+
 bool PrettyPrintView::handleEvent(Ion::Events::Event event) {
   switch (event) {
     case Ion::Events::Event::RIGHT_ARROW:

apps/calculation/pretty_print_view.h

@@ -13,6 +13,7 @@ public:
   void setBackgroundColor(KDColor backgroundColor);
   bool handleEvent(Ion::Events::Event event) override;
   KDSize minimalSizeForOptimalDisplay() override;
+  void reloadCell();
 private:
   ExpressionView m_expressionView;
   KDCoordinate m_manualScrolling;