From 1f6493e319016f8c375b62f2109ee57f5cea828d Mon Sep 17 00:00:00 2001
From: Christian Klinger
Date: Tue, 27 Sep 2016 15:38:39 +0200
Subject: Implemented 'majority vote' to determine the toolbar options.

clients in exam-mode are also displayed differently.
---
 src/server/mainwindow/mainwindow.cpp | 84 +++++++++++++++++++++++++++---------
 1 file changed, 64 insertions(+), 20 deletions(-)

(limited to 'src/server/mainwindow/mainwindow.cpp')

diff --git a/src/server/mainwindow/mainwindow.cpp b/src/server/mainwindow/mainwindow.cpp
index ae83dfb..ff34911 100644
--- a/src/server/mainwindow/mainwindow.cpp
+++ b/src/server/mainwindow/mainwindow.cpp
@@ -102,6 +102,15 @@ MainWindow::MainWindow(QWidget* parent) :
 	ui->action_Exit->setStatusTip(tr("Exit"));
 	ui->action_Lock->setStatusTip(tr("Lock or Unlock all Clients"));
 
+	/* the label */
+	_examModeLabel = new QLabel("Klausur-\nModus");
+	_examModeLabel->setObjectName("examModeLabel");
+	_examModeLabel->setAlignment(Qt::AlignCenter);
+	_examModeLabel->setFixedHeight(400);
+	ui->toolBar->insertWidget(ui->action_TutorToStudent, _examModeLabel);
+
+	Global::setExam(false);
+	updateExamMode();
 
 	// Close button in tool bar
 	connect(ui->action_Exit, SIGNAL(triggered()), this, SLOT(onButtonExit()));
@@ -117,26 +126,11 @@ MainWindow::MainWindow(QWidget* parent) :
 	connect(ui->actionReload_Room_Configuration, SIGNAL(triggered()), this, SLOT(onButtonReloadRoomConfig()));
     connect(ui->action_DeleteClient, SIGNAL(triggered()), this, SLOT(onDeleteClient()));
 
-    /* In exam-mode: disable most features */
-	QSharedPointer<QSettings> conf = Global::getSettings();
-    if (conf->contains("examMode")) {
-        Global::setExam(conf->value("examMode").toBool());
-    }
-
-    if (Global::isExam()) {
-        qDebug() << "Exam-Mode!";
-        ui->action_TutorToAll->setVisible(false);
-        ui->action_StudentToTutor->setVisible(false);
-        ui->action_StudentToTutorExclusive->setVisible(false);
-        ui->action_TutorToStudent->setVisible(false);
-        ui->action_StopProjection->setVisible(false);
-
-        QLabel* examModeLabel = new QLabel("Klausur-\nModus");
-        examModeLabel->setObjectName("examModeLabel");
-        examModeLabel->setAlignment(Qt::AlignCenter);
-        examModeLabel->setFixedHeight(400);
-        ui->toolBar->insertWidget(ui->action_TutorToStudent, examModeLabel);
-    }
+    // /* In exam-mode: disable most features */
+	// QSharedPointer<QSettings> conf = Global::getSettings();
+    // if (conf->contains("examMode")) {
+    //     Global::setExam(conf->value("examMode").toBool());
+    // }
 
 
     /* disable context-sensitive buttons by default */
@@ -186,6 +180,48 @@ MainWindow::MainWindow(QWidget* parent) :
 	tryToUseRoomTemplate();
 }
 
+/** this function determines if the number of clients in exam mode comprise
+* more than 50%. In that case the whole manager switches to exam mode,
+* disabling many features in the toolbar **/
+void MainWindow::updateExamMode() {
+	/* TODO */
+	int numerator = 0;
+	int denominator = 0;
+
+
+	for (QList<ConnectionFrame*>::iterator it(_clientFrames.begin()); it != _clientFrames.end(); ++it) {
+		Client* c = (*it)->client();
+		if (c != NULL) {
+			bool b = c->isExamMode();
+			numerator += b ? 1 : 0;
+			denominator++;
+		}
+
+	}
+	qDebug() << "updateExamMode(), ratio: " << numerator << "/" << denominator;
+
+	/* TODO: Find clients */
+	// static const QMap<QString, Room*> rooms =  getRooms();
+	// for (auto k : rooms.keys()) {
+	// 	Room* r = rooms.value(k);
+	// 	numerator += r->examMode;
+	// 	denominator++;
+	// }
+	Global::setExam(numerator * 2 >= denominator && denominator > 0);
+	bool e = Global::isExam();
+	qDebug() << "isExam is " << e;
+	ui->action_TutorToAll->setVisible(!e);
+	ui->action_StudentToTutor->setVisible(!e);
+	ui->action_StudentToTutorExclusive->setVisible(!e);
+	ui->action_TutorToStudent->setVisible(!e);
+	ui->action_StopProjection->setVisible(!e);
+	_examModeLabel->setVisible(e);
+	_examModeLabel->setFixedHeight(e ? 400 : 0);
+
+
+
+}
+
 MainWindow::~MainWindow()
 {
 	_sessionNameLabel->deleteLater();
@@ -1184,6 +1220,9 @@ void MainWindow::onClientConnected(Client* client)
 void MainWindow::onClientAuthenticating(Client* client, ClientLogin* request)
 {
 	disconnect(client, SIGNAL(authenticating(Client*, ClientLogin*)), this, SLOT(onClientAuthenticating(Client*, ClientLogin*)));
+	/* copy examMode */
+	client->setExamMode(request->examMode);
+
 	if (!request->accept) // Another receiver of that signal already rejected the client, so nothing to do
 		return;
 	bool inuse;
@@ -1251,6 +1290,7 @@ void MainWindow::onClientAuthenticated(Client* client)
 		}
 	}
 
+
 	bool isTutor = false;
 	if (!hasActiveTutor)
 	{
@@ -1271,6 +1311,7 @@ void MainWindow::onClientAuthenticated(Client* client)
 		existing->setTutor(isTutor);
 		existing->assignClient(client);
 		tellClientCurrentSituation(client);
+		updateExamMode();
 		return;
 	}
 
@@ -1307,6 +1348,7 @@ void MainWindow::onClientAuthenticated(Client* client)
 
     resizeEvent(NULL); // This is where all the positioning should be 
 	tellClientCurrentSituation(client);
+	updateExamMode();
 
 }
 
@@ -1448,9 +1490,11 @@ void MainWindow::onDeleteClient() {
             frame->deleteLater();
             _clientFrames.removeOne(frame);
             lockContextButtons();
+			updateExamMode();
             return;
         } else {
             frame->move(frame->getPreviousPosition());
+			updateExamMode();
             return;
         }
 	}
-- 
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