popupExample.cpp

Shows how to create popup windows in a client like MobileEyes

This example server program connects to a robot, and sends a message to clients (e.g. MobileEyes) to display in a dialog box when a sensor reading is detected in front of the robot within 1 meter. It also checks to see if that obstacle is not at the same angle as the previous detected obstacle -- it's probably the same one, unmoved -- to avoid sending repeated popups. The popup offers three choices, acknowlege and do nothing, turn the robot around 180 degrees, or exit the server.

#include "Aria.h"
#include "ArNetworking.h"

class SensorDetectPopup
{
public:
  SensorDetectPopup(ArRobot *robot, ArServerHandlerPopup *popupServer);
protected:
  ArRobot *myRobot;
  ArServerHandlerPopup *myPopupServer;
  bool myPopupDisplayed;
  double myPrevObstacleAngle;
  bool myPrevObstacleAngleValid;
  ArFunctor2C<SensorDetectPopup, ArTypes::Byte4, int> *myPopupClosedCB;

  void popupClosed(ArTypes::Byte4 popupID, int button);
  void sensorTask(void)  ;
};


int main(int argc, char **argv)
{
  Aria::init();
  ArRobot robot;
  ArSonarDevice sonar;
  ArSick sick;
  robot.addRangeDevice(&sonar);
  ArServerBase server;

  // Argument parser:
  ArArgumentParser parser(&argc, argv);

  // Connector and server opener:
  ArSimpleConnector simpleConnector(&parser);
  ArServerSimpleOpener simpleOpener(&parser);

  // Get command-line and other parameters
  parser.loadDefaultArguments();
  if(!Aria::parseArgs() || !parser.checkHelpAndWarnUnparsed())
  {
    Aria::logOptions();
    return 1;
  }

  // connect to the robot
  if(!simpleConnector.connectRobot(&robot))
  {
    ArLog::log(ArLog::Terse, "popupExample: Error, could not connect to robot.");
    return 1;
  }
  robot.runAsync(true);

  // connect to the laser
  sick.runAsync();
  if(!simpleConnector.connectLaser(&sick))
  {
    ArLog::log(ArLog::Normal, "popupExample: Note, could not connect to a SICK laser.");
  }
  else
  {
    robot.addRangeDevice(&sick);
  }

  // Open the server
  if(!simpleOpener.open(&server))
  {
    ArLog::log(ArLog::Terse, "popupExample: Error, could not open server.");
    return 1;
  }
  server.runAsync();
  ArLog::log(ArLog::Normal, "popupExample: Server running. Press control-C to exit.");
  ArLog::log(ArLog::Normal, "popupExample: Each time an obstacle is detected near the robot, a new popup message will be created. Connect with MobileEyes to see them.");

  // Sends robot position etc.
  ArServerInfoRobot robotInfoServer(&server, &robot);

  // This service sends drawings e.g. showing range device positions
  ArServerInfoDrawings drawingsServer(&server);
  drawingsServer.addRobotsRangeDevices(&robot);

  // This service can send messages to clients to display as popup dialogs:
  ArServerHandlerPopup popupServer(&server);

  // This object contains the robot sensor interpretation task and creates
  // popups:
  SensorDetectPopup(&robot, &popupServer);

  robot.enableMotors();
  robot.waitForRunExit();

}

SensorDetectPopup::SensorDetectPopup(ArRobot *robot, ArServerHandlerPopup *popupServer) :
  myRobot(robot),
  myPopupServer(popupServer),
  myPopupDisplayed(false),
  myPrevObstacleAngleValid(false)
{
 myRobot->lock();
 myRobot->addSensorInterpTask("sensorDetectPopup", 50, new ArFunctorC<SensorDetectPopup>(this, &SensorDetectPopup::sensorTask));
 myPopupClosedCB = new ArFunctor2C<SensorDetectPopup, ArTypes::Byte4, int>(this, &SensorDetectPopup::popupClosed);
 myRobot->unlock();
}

void SensorDetectPopup::sensorTask(void)
{
  // Basic obstacle detection
  
  if (myPopupDisplayed) return;
  double detectAngle, detectRange;
  detectRange = myRobot->checkRangeDevicesCurrentPolar(-90, 90, &detectAngle);
  if (detectRange > 0 && detectRange <= 500)
  {
    if(myPrevObstacleAngleValid && fabs(detectAngle - myPrevObstacleAngle) < 0.0001)
      return;
    ArLog::log(ArLog::Normal, "popupExample: New obstacle detected at range %f, angle %f. Displaying popup dialog on client...", detectRange, detectAngle);

    ArServerHandlerPopupInfo info("popupExample", // ID
              "Object Detected",                  // Title
              "A range sensor detected a reading within 0.5 meters of the robot.", // Message
              ArServerHandlerPopup::INFORMATION,  // Type
              0,                                  // Default button
              0,                                  // Cancel/escape button
              5,                                 // Timeout (sec.)
              NULL,                               // Timeout String
              "OK", "Acknowleged.",               // Button 0 Label/Acknowlegement
              "Turn Around", "Requested rotate...",   // Button 1 Label/Acknowlegement
              "Shut Down", "Shutting down server..."  // Button 2 Label/Acknowlegement
             );
    int id = myPopupServer->createPopup(&info, myPopupClosedCB);
    ArLog::log(ArLog::Normal, "\t...Created a popup with ID=%d", id);
    myPopupDisplayed = true;
    myPrevObstacleAngle = detectAngle;
    myPrevObstacleAngleValid = true;
  }
}

void SensorDetectPopup::popupClosed(ArTypes::Byte4 popupID, int button)
{
  // A client closed the popup
  ArLog::log(ArLog::Normal, "popupExample: a client closed popup dialog window with id=%d. Button=%d...", popupID, button);
  myPopupDisplayed = false;

  if(button < 0)
  {
    ArLog::log(ArLog::Normal, "\t...popup timed out or closed due to an error.");
    return;
  }

  if (button == 0)
  {
    ArLog::log(ArLog::Normal, "\t...OK pressed.");
    return;
  }

  if(button == 1)
  {
    ArLog::log(ArLog::Normal, "\t...180 degree rotate requested.");
    myRobot->lock();
    myRobot->setDeltaHeading(180);
    myRobot->unlock();
    return;
  }

  if(button == 2)
  {
    ArLog::log(ArLog::Normal, "\t...exit requested.");
    myRobot->stopRunning();
    Aria::shutdown();
    Aria::exit(0);
  }
}

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