[apps] Warn & Suspend when the battery is too low

Change-Id: I814697b36f6111198dc367d4591371e6a6e260d8

apps/Makefile

@@ -16,8 +16,9 @@ app_objs += $(addprefix apps/,\
   battery_timer.o\
   battery_view.o\
   constant.o\
-  global_preferences.o\
+  empty_battery_window.o\
   exam_pop_up_controller.o\
+  global_preferences.o\
   i18n.o\
   led_timer.o\
   main.o\

apps/apps_container.cpp

@@ -12,6 +12,7 @@ using namespace Shared;
 AppsContainer::AppsContainer() :
   Container(),
   m_window(AppsWindow()),
+  m_emptyBatteryWindow(EmptyBatteryWindow()),
   m_homeApp(this),
   m_graphApp(this, &m_globalContext),
   m_probabilityApp(this),
@@ -29,6 +30,7 @@ AppsContainer::AppsContainer() :
   m_USBTimer(USBTimer(this))
 {
   refreshPreferences();
+  m_emptyBatteryWindow.setFrame(KDRect(0, 0, Ion::Display::Width, Ion::Display::Height));
 }
 
 int AppsContainer::numberOfApps() {
@@ -115,6 +117,15 @@ void AppsContainer::displayExamModePopUp(bool activate, bool forceWindowRedraw)
   }
 }
 
+void AppsContainer::shutdownDueToLowBattery() {
+  while (Ion::Battery::level() == Ion::Battery::Charge::EMPTY) {
+    m_emptyBatteryWindow.redraw(true);
+    Ion::msleep(3000);
+    Ion::Power::suspend();
+  }
+  window()->redraw(true);
+}
+
 Window * AppsContainer::window() {
   return &m_window;
 }

apps/apps_container.h

@@ -11,6 +11,7 @@
 #include "settings/app.h"
 #include "statistics/app.h"
 #include "apps_window.h"
+#include "empty_battery_window.h"
 #include "math_toolbox.h"
 #include "variable_box_controller.h"
 #include "exam_pop_up_controller.h"
@@ -38,12 +39,14 @@ public:
   void updateBatteryState();
   void refreshPreferences();
   void displayExamModePopUp(bool activate, bool forceRedrawWindow);
+  void shutdownDueToLowBattery();
 private:
   Window * window() override;
   int numberOfTimers() override;
   Timer * timerAtIndex(int i) override;
   static constexpr int k_numberOfApps = 9;
   AppsWindow m_window;
+  EmptyBatteryWindow m_emptyBatteryWindow;
   Home::App m_homeApp;
   Graph::App m_graphApp;
   Probability::App m_probabilityApp;

apps/battery_timer.cpp

@@ -9,4 +9,7 @@ BatteryTimer::BatteryTimer(AppsContainer * container) :
 
 void BatteryTimer::fire() {
   m_container->updateBatteryState();
+  if (Ion::Battery::level() == Ion::Battery::Charge::EMPTY) {
+    m_container->shutdownDueToLowBattery();
+  }
 }

apps/empty_battery_window.cpp

@@ -0,0 +1,19 @@
+#include "empty_battery_window.h"
+#include "i18n.h"
+#include "global_preferences.h"
+extern "C" {
+#include <assert.h>
+}
+
+EmptyBatteryWindow::EmptyBatteryWindow() :
+  Window()
+{
+}
+
+void EmptyBatteryWindow::drawRect(KDContext * ctx, KDRect rect) const {
+  ctx->fillRect(bounds(), KDColorWhite);
+  const char * warningMessage = I18n::translate(I18n::Message::LowBattery, GlobalPreferences::sharedGlobalPreferences()->language());
+  KDSize warningSize = KDText::stringSize(warningMessage, KDText::FontSize::Large);
+  ctx->drawString(warningMessage, KDPoint((Ion::Display::Width - warningSize.width())/2, (Ion::Display::Height - warningSize.height())/2), KDText::FontSize::Large);
+}
+

apps/empty_battery_window.h

@@ -0,0 +1,12 @@
+#ifndef APPS_EMPTY_BATTERY_WINDOW_H
+#define APPS_EMPTY_BATTERY_WINDOW_H
+
+#include <escher.h>
+
+class EmptyBatteryWindow : public Window {
+public:
+  EmptyBatteryWindow();
+  void drawRect(KDContext * ctx, KDRect rect) const;
+};
+
+#endif

apps/i18n.cpp

@@ -17,13 +17,14 @@ constexpr static char deviationFrenchDefinition[] = {Ion::Charset::SmallSigma, '
 constexpr static char deviationEnglishDefinition[] = {Ion::Charset::SmallSigma, ' ', ':', ' ', 'S', 't', 'a', 'n', 'd', 'a', 'r', 'd', ' ','d','e', 'v', 'i', 'a', 't','i','o','n', 0};
 constexpr static char deviationSpanishDefinition[] = {Ion::Charset::SmallSigma, ' ', ':', ' ', 'D', 'e','s','v','i','a','c','i','o','n',' ','t','i','p','i','c','a',0};
 
-const char * messages[210][3] {
+const char * messages[211][3] {
   {"Attention", "Warning", "Cuidado"},
   {"Valider", "Confirm", "Confirmar"},
   {"Annuler", "Cancel", "Cancelar"},
   {"Suivant", "Next", "Siguiente"},
   {"Attention a la syntaxe", "Syntax error", "Error sintactico"},
   {"Erreur mathematique", "Math error", "Error matematico"},
+  {"Batterie faible", "Low battery", "Bateria baja"},
 
   /* Variables */
   {"Variables", "Variables", "Variables"},

apps/i18n.h

@@ -11,6 +11,7 @@ namespace I18n {
     Next = 3,
     SyntaxError,
     MathError,
+    LowBattery,
 
     /* Variables */
     Variables,