added error handling and basic config options

mainwindow.cpp

@@ -101,8 +101,8 @@ void MainWindow::loadVMData(std::string id){
  * \brief Login Button handler, connects to server, if authentication is succesful enables all tabs, and loads all data
  */
 void MainWindow::on_bLogin_clicked()
-{
-    std::string serverUrl = ui->iCloudServer->text().toStdString();
+{   try{
+        std::string serverUrl = parseConfig();//"https://vm.ik.bme.hu:9366/occi/";
         myController.connect(serverUrl);
         std::string username = ui->iUsername->text().toStdString();
         std::string password = ui->iPassword->text().toStdString();
@@ -114,6 +114,28 @@ void MainWindow::on_bLogin_clicked()
         ui->tabWidget->setTabEnabled(2, true);
         loadAllData();
         ui->tabWidget->setCurrentIndex(1);
+    }
+    catch(std::logic_error e){
+        QMessageBox msgBox;
+        msgBox.setText(e.what());
+        msgBox.exec();
+    }
+}
+
+std::string MainWindow::parseConfig(){
+    std::string line;
+    std::ifstream myfile ("config.txt");
+    if (myfile.is_open())
+    {
+      while ( getline (myfile,line) )
+      {
+        return line;
+      }
+      myfile.close();
+    }
+    else
+        throw std::logic_error("Unable to configure client. Please add a config.txt with the cloud server's url!");
+    return "";
 }
 
 /// Tab 1 - Virtual Machines
@@ -133,6 +155,7 @@ void MainWindow::renewClicked(std::string id){
  * \param id
  */
 void MainWindow::startshutdownClicked(std::string id){
+    try{
         std::string state = myController.getState(id);
         if(state == "inactive"){
             myController.startByID(id);
@@ -143,6 +166,10 @@ void MainWindow::startshutdownClicked(std::string id){
         emit stateChanged(myController.getState(id), id);
         loadVMData(id);
         ui->listWidget->item(std::stoi(id))->setSelected(true);
+    }
+    catch(std::logic_error e){
+        showErrorMessage(e.what());
+    }
 }
 
 /*!
@@ -150,6 +177,7 @@ void MainWindow::startshutdownClicked(std::string id){
  * \param id
  */
 void MainWindow::wakeupsleepClicked(std::string id){
+    try{
         std::string state = myController.getState(id);
         if(state == "active"){ //sleep
             myController.sleepByID(id);
@@ -163,6 +191,17 @@ void MainWindow::wakeupsleepClicked(std::string id){
         emit stateChanged(myController.getState(id), id);
         loadVMData(id);
         ui->listWidget->item(std::stoi(id))->setSelected(true);
+    }
+    catch(std::logic_error e){
+        showErrorMessage(e.what());
+    }
+}
+
+void MainWindow::showErrorMessage(std::string errorMsg){
+    QMessageBox msgBox;
+    msgBox.setWindowTitle("Error!");
+    msgBox.setText(errorMsg.c_str());
+    msgBox.exec();
 }
 
 /*!

mainwindow.h

@@ -10,6 +10,9 @@
 #include "controller.h"
 #include "vmchooserdialog.h"
 #include <qtermwidget5/qtermwidget.h>
+#include <iostream>
+#include <fstream>
+#include <string>
 
 namespace Ui {
 class MainWindow;
@@ -25,6 +28,8 @@ public:
     void addVM(std::string id, std::string name);
     void loadAllData();
     void loadVMData(std::string id);
+    std::string parseConfig();
+    void showErrorMessage(std::string errorMsg);
 
 signals:
     void stateChanged(std::string state, std::string id);

mainwindow.ui

@@ -95,7 +95,7 @@
        <enum>QTabWidget::Rounded</enum>
       </property>
       <property name="currentIndex">
-       <number>1</number>
+       <number>0</number>
       </property>
       <property name="iconSize">
        <size>
@@ -108,7 +108,7 @@
         <string>Welcome</string>
        </attribute>
        <layout class="QGridLayout" name="gridLayout_4">
-        <item row="10" column="1">
+        <item row="8" column="1">
          <widget class="QPushButton" name="bLogin">
           <property name="toolTip">
            <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Log in&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
@@ -121,7 +121,7 @@
           </property>
          </widget>
         </item>
-        <item row="9" column="1">
+        <item row="7" column="1">
          <widget class="QLineEdit" name="iPassword">
           <property name="palette">
            <palette>
@@ -171,7 +171,7 @@
           </property>
          </widget>
         </item>
-        <item row="3" column="2" rowspan="10">
+        <item row="3" column="2" rowspan="8">
          <spacer name="horizontalSpacer_2">
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
@@ -187,7 +187,7 @@
           </property>
          </spacer>
         </item>
-        <item row="3" column="0" rowspan="10">
+        <item row="3" column="0" rowspan="8">
          <spacer name="horizontalSpacer">
           <property name="orientation">
            <enum>Qt::Horizontal</enum>
@@ -203,7 +203,7 @@
           </property>
          </spacer>
         </item>
-        <item row="12" column="1">
+        <item row="10" column="1">
          <spacer name="verticalSpacer">
           <property name="orientation">
            <enum>Qt::Vertical</enum>
@@ -219,14 +219,14 @@
           </property>
          </spacer>
         </item>
-        <item row="8" column="1">
+        <item row="6" column="1">
          <widget class="QLabel" name="lPassword">
           <property name="text">
            <string>Password</string>
           </property>
          </widget>
         </item>
-        <item row="7" column="1">
+        <item row="5" column="1">
          <widget class="QLineEdit" name="iUsername">
           <property name="palette">
            <palette>
@@ -283,7 +283,7 @@
           </property>
          </spacer>
         </item>
-        <item row="6" column="1">
+        <item row="4" column="1">
          <widget class="QLabel" name="lUsername">
           <property name="text">
            <string>Username</string>
@@ -313,7 +313,7 @@
           </property>
          </widget>
         </item>
-        <item row="11" column="1">
+        <item row="9" column="1">
          <widget class="QLabel" name="lInfo">
           <property name="palette">
            <palette>
@@ -360,57 +360,6 @@
           </property>
          </widget>
         </item>
-        <item row="4" column="1">
-         <widget class="QLabel" name="lCloudServer">
-          <property name="text">
-           <string>Cloud Server:</string>
-          </property>
-         </widget>
-        </item>
-        <item row="5" column="1">
-         <widget class="QLineEdit" name="iCloudServer">
-          <property name="palette">
-           <palette>
-            <active>
-             <colorrole role="Base">
-              <brush brushstyle="SolidPattern">
-               <color alpha="255">
-                <red>255</red>
-                <green>255</green>
-                <blue>255</blue>
-               </color>
-              </brush>
-             </colorrole>
-            </active>
-            <inactive>
-             <colorrole role="Base">
-              <brush brushstyle="SolidPattern">
-               <color alpha="255">
-                <red>255</red>
-                <green>255</green>
-                <blue>255</blue>
-               </color>
-              </brush>
-             </colorrole>
-            </inactive>
-            <disabled>
-             <colorrole role="Base">
-              <brush brushstyle="SolidPattern">
-               <color alpha="255">
-                <red>240</red>
-                <green>240</green>
-                <blue>240</blue>
-               </color>
-              </brush>
-             </colorrole>
-            </disabled>
-           </palette>
-          </property>
-          <property name="text">
-           <string>https://vm.ik.bme.hu:9366/occi/</string>
-          </property>
-         </widget>
-        </item>
        </layout>
       </widget>
       <widget class="QWidget" name="tVM">