[apps] create a class variable box lead cell

Change-Id: Iab0d283d4472a40a5c628d770d829dc84979791b

apps/Makefile

@@ -16,6 +16,7 @@ app_objs += $(addprefix apps/,\
   toolbox_leaf_cell.o\
   toolbox_node.o\
   variable_box_controller.o\
+  variable_box_leaf_cell.o\
   variable_box_node.o\
 )
 

apps/variable_box_leaf_cell.cpp

@@ -0,0 +1,70 @@
+#include "variable_box_leaf_cell.h"
+#include <assert.h>
+
+VariableBoxLeafCell::VariableBoxLeafCell() :
+  TableViewCell(),
+  m_labelView(PointerTextView(nullptr, 0, 0.5, KDColorBlack, Palette::CellBackgroundColor)),
+  m_subtitleView(BufferTextView(0, 0.5, Palette::DesactiveTextColor, Palette::CellBackgroundColor))  
+{
+}
+
+int VariableBoxLeafCell::numberOfSubviews() const {
+  if (strlen(m_subtitleView.text()) > 0) {
+    return 3;
+  }
+  return 2;
+}
+
+View * VariableBoxLeafCell::subviewAtIndex(int index) {
+  if (index == 0) {
+    return &m_labelView;
+  }
+  if (index == 1) {
+    return &m_expressionView;
+  }
+  assert(numberOfSubviews() == 3 && index == 2);
+  return &m_subtitleView;
+}
+
+void VariableBoxLeafCell::layoutSubviews() {
+  KDCoordinate width = bounds().width();
+  KDCoordinate height = bounds().height();
+  m_expressionView.setFrame(KDRect(width/2, 1, width/2-1, height-2));
+  if (numberOfSubviews() == 3) {
+    m_labelView.setFrame(KDRect(1, 1, width/2-1, height/2 - 1));
+    m_subtitleView.setFrame(KDRect(1, height/2, width/2-1, height/2 - 1));
+    return;
+  }
+  m_labelView.setFrame(KDRect(1, 1, width/2-1, height-2));
+}
+
+void VariableBoxLeafCell::reloadCell() {
+  TableViewCell::reloadCell();
+  KDColor backgroundColor = isHighlighted()? Palette::FocusCellBackgroundColor : Palette::CellBackgroundColor;
+  m_labelView.setBackgroundColor(backgroundColor);
+  m_subtitleView.setBackgroundColor(backgroundColor);
+  m_expressionView.setBackgroundColor(backgroundColor);
+}
+
+void VariableBoxLeafCell::setLabel(const char * text) {
+  m_labelView.setText(text);
+}
+
+void VariableBoxLeafCell::setSubtitle(const char * text) {
+  m_subtitleView.setText(text);
+  layoutSubviews();
+}
+
+void VariableBoxLeafCell::setExpression(ExpressionLayout * expressionLayout) {
+  m_expressionView.setExpression(expressionLayout);
+}
+
+void VariableBoxLeafCell::drawRect(KDContext * ctx, KDRect rect) const {
+  KDCoordinate width = bounds().width();
+  KDCoordinate height = bounds().height();
+  KDColor backgroundColor = isHighlighted() ? Palette::FocusCellBackgroundColor : Palette::CellBackgroundColor;
+  ctx->fillRect(KDRect(1, 0, width-2, height-1), backgroundColor);
+  ctx->fillRect(KDRect(0, height-1, width, 1), Palette::LineColor);
+  ctx->fillRect(KDRect(0, 0, 1, height-1), Palette::LineColor);
+  ctx->fillRect(KDRect(width-1, 0, 1, height-1), Palette::LineColor);
+ }

apps/variable_box_leaf_cell.h

@@ -0,0 +1,23 @@
+#ifndef APPS_VARIABLE_BOX_LEAF_CELL_H
+#define APPS_VARIABLE_BOX_LEAF_CELL_H
+
+#include <escher.h>
+
+class VariableBoxLeafCell : public TableViewCell {
+public:
+  VariableBoxLeafCell();
+  void reloadCell() override;
+  void setLabel(const char * text);
+  void setSubtitle(const char * text);
+  void setExpression(ExpressionLayout * expressionLayout);
+  void drawRect(KDContext * ctx, KDRect rect) const override;
+private:
+  int numberOfSubviews() const override;
+  View * subviewAtIndex(int index) override;
+  void layoutSubviews() override;
+  PointerTextView m_labelView;
+  BufferTextView m_subtitleView;
+  ExpressionView m_expressionView;
+};
+
+#endif