From 07778419d9e522085fbaf8da8d13e63717f54d31 Mon Sep 17 00:00:00 2001
From: Simon Rettberg
Date: Thu, 12 Jul 2018 15:58:29 +0200
Subject: [server] Add button to lock/unlock single client

---
 src/server/mainwindow/mainwindow.cpp | 37 ++++++++++++++++++++++++++++++++----
 src/server/mainwindow/mainwindow.h   |  1 +
 src/server/net/client.cpp            |  5 ++++-
 3 files changed, 38 insertions(+), 5 deletions(-)

(limited to 'src')

diff --git a/src/server/mainwindow/mainwindow.cpp b/src/server/mainwindow/mainwindow.cpp
index cb3ef86..8d5bd4a 100644
--- a/src/server/mainwindow/mainwindow.cpp
+++ b/src/server/mainwindow/mainwindow.cpp
@@ -122,6 +122,7 @@ MainWindow::MainWindow(QWidget* parent) :
 	connect(ui->action_SetAsTutor, SIGNAL(triggered()), this, SLOT(onButtonSetAsTutor()));
 	connect(ui->action_SetAsTutor, SIGNAL(triggered()), this, SLOT(onButtonStopProjection()));
 	connect(ui->action_Lock, SIGNAL(toggled(bool)), this, SLOT(onButtonLock(bool)));
+	connect(ui->action_LockSingle, SIGNAL(triggered()), this, SLOT(onButtonLockSingle()));
 	connect(ui->action_Help, SIGNAL(triggered()), this, SLOT(onButtonHelp()));
 	connect(ui->actionReload_Room_Configuration, SIGNAL(triggered()), this, SLOT(onButtonReloadRoomConfig()));
 	connect(ui->action_DeleteClient, SIGNAL(triggered()), this, SLOT(onDeleteClient()));
@@ -132,14 +133,14 @@ MainWindow::MainWindow(QWidget* parent) :
 	//     Global::setExam(conf->value("examMode").toBool());
 	// }
 
-
 	/* disable context-sensitive buttons by default */
 	_contextButtons
 	        << ui->action_DeleteClient
 	        << ui->action_StudentToTutor
 	        << ui->action_StudentToTutorExclusive
 	        << ui->action_SetAsTutor
-	        << ui->action_TutorToStudent;
+			<< ui->action_TutorToStudent
+			<< ui->action_LockSingle;
 
 	lockContextButtons();
 
@@ -578,6 +579,7 @@ void MainWindow::unlockContextButtons()
 		ui->action_StudentToTutorExclusive->setEnabled(false);
 		ui->action_StudentToTutor->setEnabled(false);
 		ui->action_TutorToStudent->setEnabled(false);
+		ui->action_LockSingle->setEnabled(false);
 	}
 
 
@@ -1035,6 +1037,35 @@ void MainWindow::onButtonLock(bool checked)
 	}
 }
 
+void MainWindow::onButtonLockSingle()
+{
+	// If no frame is selected, warning.
+	if (getSelectedFrame() == NULL) {
+		QMessageBox::critical(this, tr("Selection"), tr("No client is selected."));
+		return;
+	}
+	Client *client = getSelectedFrame()->client();
+
+	// If frame of inactive client has been selected unselect it
+	if (client == NULL) {
+		QMessageBox::critical(this, tr("Selection"), tr("The selected client is not connected."));
+		return;
+	} else { // If selected client is locked, first unlock
+		bool newState = !client->isLocked();
+		client->lockScreen(newState);
+		if (!newState) {
+			// If no more clients are locked, reset button
+			for (QList<ConnectionFrame*>::iterator it(_clientFrames.begin()); it != _clientFrames.end(); ++it) {
+				if ((*it)->client() == NULL)
+					continue;
+				if ((*it)->client()->isLocked())
+					return;
+			}
+			ui->action_Lock->setChecked(false);
+		}
+	}
+}
+
 /***************************************************************************//**
  * On button exit, close application.
  */
@@ -1049,8 +1080,6 @@ void MainWindow::onButtonExit()
  */
 void MainWindow::onButtonSetAsTutor()
 {
-	ui->action_Lock->setChecked(false);
-
 	// If no frame is selected, warning.
 	if (getSelectedFrame() == NULL) {
 		QMessageBox::critical(this, tr("Selection"), tr("No client is selected."));
diff --git a/src/server/mainwindow/mainwindow.h b/src/server/mainwindow/mainwindow.h
index a07e710..ba24bae 100644
--- a/src/server/mainwindow/mainwindow.h
+++ b/src/server/mainwindow/mainwindow.h
@@ -114,6 +114,7 @@ protected slots:
 	void onDeleteClient();
 
 	void onButtonLock(bool checked);
+	void onButtonLockSingle();
 	void onButtonStudentToTutor();
 	void onButtonStudentToTutorExclusive();
 	void onButtonTutorToAll();
diff --git a/src/server/net/client.cpp b/src/server/net/client.cpp
index 82ebf26..7f94983 100644
--- a/src/server/net/client.cpp
+++ b/src/server/net/client.cpp
@@ -323,7 +323,10 @@ bool Client::isManagerMachine()
 /******************************************************************************/
 void Client::lockScreen(bool lock)
 {
-	if (!_isTutor && _locked != lock && !isManagerMachine()) {
+	if (_isTutor || isManagerMachine()) {
+		lock = false;
+	}
+	if (_locked != lock) {
 		_locked = lock;
 		NetworkMessage msg;
 		msg.setField(_ID, _LOCK);
-- 
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