[apps/calculation] Change names: PrettyPrintView -->

ScrollableExpressionView and make result View an scrollable expression
view

Change-Id: I9ac85671bcb4fdbeda0e5dbc6788dc7eb93b7343

apps/calculation/scrollable_expression_view.cpp

@@ -0,0 +1,59 @@
+#include "scrollable_expression_view.h"
+#include <assert.h>
+
+namespace Calculation {
+
+ScrollableExpressionView::ScrollableExpressionView(Responder * parentResponder) :
+  ScrollView(&m_expressionView, 0, 0, 0, 0, false),
+  Responder(parentResponder),
+  m_expressionView(ExpressionView()),
+  m_manualScrolling(0)
+{
+}
+
+void ScrollableExpressionView::setExpression(ExpressionLayout * expressionLayout) {
+  m_expressionView.setExpression(expressionLayout);
+  layoutSubviews();
+}
+
+void ScrollableExpressionView::setBackgroundColor(KDColor backgroundColor) {
+  m_expressionView.setBackgroundColor(backgroundColor);
+}
+
+void ScrollableExpressionView::layoutSubviews() {
+  m_expressionView.setSize(m_expressionView.minimalSizeForOptimalDisplay());
+  ScrollView::layoutSubviews();
+}
+
+KDSize ScrollableExpressionView::minimalSizeForOptimalDisplay() {
+  return m_expressionView.minimalSizeForOptimalDisplay();
+}
+
+void ScrollableExpressionView::reloadCell() {
+  m_manualScrolling = 0;
+  setContentOffset(KDPoint(m_manualScrolling, 0));
+}
+
+bool ScrollableExpressionView::rightViewIsInvisible() {
+  return m_expressionView.bounds().width() - m_manualScrolling > bounds().width();
+}
+
+bool ScrollableExpressionView::handleEvent(Ion::Events::Event event) {
+  if (event == Ion::Events::Right && rightViewIsInvisible()) {
+      KDCoordinate rightSpace = m_expressionView.bounds().width() - m_manualScrolling - bounds().width();
+      KDCoordinate scrollAdd = rightSpace > 10 ? 10 : rightSpace;
+      m_manualScrolling += scrollAdd;
+      setContentOffset(KDPoint(m_manualScrolling, 0));
+      return true;
+  }
+  if (event == Ion::Events::Left && m_manualScrolling > 0) {
+    KDCoordinate leftSpace = m_manualScrolling;
+    KDCoordinate scrollSubstract = leftSpace > 10 ? 10 : leftSpace;
+    m_manualScrolling -= scrollSubstract;
+    setContentOffset(KDPoint(m_manualScrolling, 0));
+    return true;
+  }
+  return false;
+}
+
+}