From d5606367d7bc9c9e40bc9becd847238bd271e944 Mon Sep 17 00:00:00 2001
From: Romain Goyet <romain.goyet@numworks.com>
Date: Tue, 14 Jun 2016 17:04:46 +0200
Subject: [PATCH] Escher: Add TableView::cellAtIndex

Change-Id: I7b78b7fa05d4c1390dd7c58ef098b3708c972119
---
 escher/include/escher/table_view.h |  6 +++++-
 escher/src/table_view.cpp          | 20 ++++++++++++++++----
 2 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/escher/include/escher/table_view.h b/escher/include/escher/table_view.h
index 06b7c7ff0..e67da825c 100644
--- a/escher/include/escher/table_view.h
+++ b/escher/include/escher/table_view.h
@@ -15,9 +15,10 @@ public:
 class TableView : public ScrollView {
 public:
   TableView(TableViewDataSource * dataSource);
+  void layoutSubviews() override;
 
   void scrollToRow(int index);
-  void layoutSubviews() override;
+  View * cellAtIndex(int index);
 protected:
 #if ESCHER_VIEW_LOGGING
   const char * className() const override;
@@ -31,12 +32,15 @@ private:
     View * subview(int index) override;
     void storeSubviewAtIndex(View * view, int index) override;
     void layoutSubviews() override;
+
+    View * cellAtIndex(int index);
   protected:
 #if ESCHER_VIEW_LOGGING
     const char * className() const override;
 #endif
   private:
     int numberOfDisplayableCells() const;
+    int cellScrollingOffset() const;
     TableViewDataSource * m_dataSource;
   };
 
diff --git a/escher/src/table_view.cpp b/escher/src/table_view.cpp
index 1c278a4f8..0cd0dfe57 100644
--- a/escher/src/table_view.cpp
+++ b/escher/src/table_view.cpp
@@ -30,6 +30,10 @@ void TableView::scrollToRow(int index) {
   setContentOffset(contentOffset);
 }
 
+View * TableView::cellAtIndex(int index) {
+  return m_contentView.cellAtIndex(index);
+}
+
 #if ESCHER_VIEW_LOGGING
 const char * TableView::className() const {
   return "TableView";
@@ -62,10 +66,7 @@ void TableView::ContentView::storeSubviewAtIndex(View * view, int index) {
 }
 
 void TableView::ContentView::layoutSubviews() {
-  /* Here, we want to translate the offset at which our superview is displaying
-   * us into an integer offset we can use to ask cells to our data source. */
-  KDCoordinate pixelScrollingOffset = m_frame.y;
-  int cellOffset = pixelScrollingOffset / m_dataSource->cellHeight();
+  int cellOffset = cellScrollingOffset();
 
   for (int i=0; i<numberOfSubviews(); i++) {
     View * cell = subview(i);
@@ -83,6 +84,10 @@ void TableView::ContentView::layoutSubviews() {
   }
 }
 
+View * TableView::ContentView::cellAtIndex(int index) {
+  return m_dataSource->reusableCell(index - cellScrollingOffset());
+}
+
 #if ESCHER_VIEW_LOGGING
 const char * TableView::ContentView::className() const {
   return "TableView::ContentView";
@@ -94,3 +99,10 @@ int TableView::ContentView::numberOfDisplayableCells() const {
   assert(result <= m_dataSource->reusableCellCount());
   return result;
 }
+
+int TableView::ContentView::cellScrollingOffset() const {
+  /* Here, we want to translate the offset at which our superview is displaying
+   * us into an integer offset we can use to ask cells to our data source. */
+  KDCoordinate pixelScrollingOffset = m_frame.y;
+  return pixelScrollingOffset / m_dataSource->cellHeight();
+}