[python] A module can now ask to present a view controller

apps/code/console_controller.cpp

@@ -183,6 +183,11 @@ const char * ConsoleController::inputText(const char * prompt) {
   return text;
 }
 
+void ConsoleController::displayViewController(ViewController * controller) {
+  stackViewController()->push(controller);
+  Container::activeApp()->setFirstResponder(controller); // FIXME: Shouldn't this be in Escher?
+}
+
 void ConsoleController::viewWillAppear() {
   ViewController::viewWillAppear();
   loadPythonEnvironment();

apps/code/console_controller.h

@@ -66,6 +66,7 @@ public:
   void refreshPrintOutput() override;
   void printText(const char * text, size_t length) override;
   const char * inputText(const char * prompt) override;
+  void displayViewController(ViewController * controller) override;
 
 #if EPSILON_GETOPT
   bool locked() const {

python/port/port.h

@@ -4,6 +4,7 @@
 extern "C" {
 #include <stddef.h>
 }
+#include <escher/view_controller.h>
 
 namespace MicroPython {
 
@@ -21,6 +22,7 @@ public:
   virtual void displaySandbox() {}
   virtual void hideSandbox() {}
   virtual void resetSandbox() {}
+  virtual void displayViewController(ViewController * controller) {}
   virtual void printText(const char * text, size_t length) {}
   virtual void refreshPrintOutput() {}
   void interrupt();