[apps/calculation] Create a specific table view for calculation which

aligns to the bottom

Change-Id: I4fe9763b1d9ae2ae3e898046221b780c51515830

apps/calculation/Makefile

@@ -2,6 +2,7 @@ app_objs += $(addprefix apps/calculation/,\
   app.o\
   calculation.o\
   calculation_store.o\
+  selectable_table_view.o\
   history_view_cell.o\
   history_controller.o\
   edit_expression_controller.o\

apps/calculation/selectable_table_view.cpp

@@ -0,0 +1,26 @@
+#include "selectable_table_view.h"
+
+namespace Calculation {
+
+CalculationSelectableTableView::CalculationSelectableTableView(Responder * parentResponder, TableViewDataSource * dataSource,
+ SelectableTableViewDelegate * delegate) :
+  ::SelectableTableView(parentResponder, dataSource, 0, 0, 0, 0, delegate)
+{
+}
+
+void CalculationSelectableTableView::scrollToCell(int i, int j) {
+  ::SelectableTableView::scrollToCell(i, j);
+  if (m_contentView.bounds().height() < bounds().height()) {
+    m_topMargin = bounds().height() - m_contentView.bounds().height();
+  } else {
+    m_topMargin = 0;
+  }
+  ScrollView::layoutSubviews();
+  if (m_contentView.bounds().height() - contentOffset().y() < bounds().height()) {
+    KDCoordinate contentOffsetX = contentOffset().x();
+    KDCoordinate contentOffsetY = dataSource()->cumulatedHeightFromIndex(dataSource()->numberOfRows()) - maxContentHeightDisplayableWithoutScrolling();
+    setContentOffset(KDPoint(contentOffsetX, contentOffsetY));
+  }
+}
+
+}

apps/calculation/selectable_table_view.h

@@ -0,0 +1,17 @@
+#ifndef CALCULATION_SELECTABLE_TABLE_VIEW_H
+#define CALCULATION_SELECTABLE_TABLE_VIEW_H
+
+#include <escher.h>
+
+namespace Calculation {
+
+class CalculationSelectableTableView : public ::SelectableTableView {
+public:
+  CalculationSelectableTableView(Responder * parentResponder, TableViewDataSource * dataSource,
+    SelectableTableViewDelegate * delegate = nullptr);
+  void scrollToCell(int i, int j) override;
+};
+
+}
+
+#endif

escher/include/escher/scroll_view.h

@@ -19,6 +19,7 @@ protected:
   KDCoordinate maxContentHeightDisplayableWithoutScrolling();
   void layoutSubviews() override;
   void updateScrollIndicator();
+  KDCoordinate m_topMargin;
 #if ESCHER_VIEW_LOGGING
   virtual const char * className() const override;
   virtual void logAttributes(std::ostream &os) const override;
@@ -34,7 +35,6 @@ private:
   ScrollViewIndicator m_horizontalScrollIndicator;
   bool hasVerticalIndicator() const;
   bool hasHorizontalIndicator() const;
-  KDCoordinate m_topMargin;
   KDCoordinate m_rightMargin;
   KDCoordinate m_bottomMargin;
   KDCoordinate m_leftMargin;

escher/include/escher/table_view.h

@@ -10,7 +10,7 @@ public:
   TableView(TableViewDataSource * dataSource, KDCoordinate topMargin = 0,
     KDCoordinate rightMargin = 0, KDCoordinate bottomMargin = 0, KDCoordinate leftMargin = 0);
 
-  void scrollToCell(int i, int j);
+  virtual void scrollToCell(int i, int j);
   TableViewCell * cellAtLocation(int i, int j);
   void reloadData();
   KDSize size() const;
@@ -19,7 +19,6 @@ protected:
   const char * className() const override;
 #endif
   TableViewDataSource * dataSource();
-private:
   class ContentView : public View {
   public:
     ContentView(TableView * tableView, TableViewDataSource * dataSource);
@@ -65,10 +64,9 @@ private:
     TableView * m_tableView;
     TableViewDataSource * m_dataSource;
   };
-
-  void layoutSubviews() override;
-
   ContentView m_contentView;
+private:
+  void layoutSubviews() override;
 };
 
 #endif

escher/src/scroll_view.cpp

@@ -10,11 +10,11 @@ constexpr KDCoordinate ScrollView::k_indicatorThickness;
 ScrollView::ScrollView(View * contentView, KDCoordinate topMargin, KDCoordinate rightMargin,
   KDCoordinate bottomMargin, KDCoordinate leftMargin, bool showIndicators) :
   View(),
+  m_topMargin(topMargin),
   m_offset(KDPointZero),
   m_contentView(contentView),
   m_verticalScrollIndicator(ScrollViewIndicator(ScrollViewIndicator::Direction::Vertical)),
   m_horizontalScrollIndicator(ScrollViewIndicator(ScrollViewIndicator::Direction::Horizontal)),
-  m_topMargin(topMargin),
   m_rightMargin(rightMargin),
   m_bottomMargin(bottomMargin),
   m_leftMargin(leftMargin),