[escher] Divide class selectable table view delegate in 2: selectable

table view data source & selectable table view delegate

Change-Id: I90fbd61e271db3754c13bd0069b95c2026de6814

escher/src/selectable_table_view_data_source.cpp

@@ -0,0 +1,28 @@
+#include <escher/selectable_table_view_data_source.h>
+
+SelectableTableViewDataSource::SelectableTableViewDataSource() :
+  m_selectedCellX(0),
+  m_selectedCellY(-1)
+{
+}
+
+int SelectableTableViewDataSource::selectedRow() {
+  return m_selectedCellY;
+}
+
+int SelectableTableViewDataSource::selectedColumn() {
+  return m_selectedCellX;
+}
+
+void SelectableTableViewDataSource::selectRow(int j) {
+  m_selectedCellY = j;
+}
+
+void SelectableTableViewDataSource::selectColumn(int i) {
+  m_selectedCellX = i;
+}
+
+void SelectableTableViewDataSource::selectCellAtLocation(int i, int j) {
+  m_selectedCellX = i;
+  m_selectedCellY = j;
+}