fixed xrandr parsing

app/SandboxSetup/SandboxSetup.pro

@@ -63,7 +63,6 @@ FORMS += \
     saveconfiggui.ui
 
 
-
 INCLUDEPATH += ../../inc
 
 LIBS += -L"../../build" -lsandbox -lrealsense2 -lyaml-cpp

app/SandboxSetup/monitorgui.cpp

@@ -84,7 +84,7 @@ void MonitorGui::on_cbxOutputs_currentIndexChanged(int index)
 void MonitorGui::initMonitorMapWithFile(std::string path){
 
     // Save in file the monitors and their resolutions
-    int err = system( ("xrandr -d :0 | sed -n '1!p' > " + path).c_str() );
+    int err = system( ("xrandr | sed -n '1!p' > " + path).c_str() );
     if(err){
         std::cout << "Couldn't get screens and their resolutions" << std::endl;
         exit(err);

app/SandboxSetup/projectiongui.cpp

@@ -53,7 +53,11 @@ void ProjectionGui::refreshFrame(){
 void ProjectionGui::startCapture(){
     if(!cameraUsed){
         // open blue screen on the selected output
-        cv::Mat blue = cv::Mat(1, 1, CV_8UC3, cv::Scalar(0, 0, 255));
+        setup->getCamera()->capture();
+        cv::Mat rgb = setup->getCamera()->getColorFrame();
+        cv::Size sz = rgb.size();
+        cv::Mat blue = cv::Mat(sz.height, sz.width, CV_8UC3, cv::Scalar(0, 0, 255));
+        cv::circle(blue, cv::Point(sz.width/2, sz.height/2), sz.height*2/100, cv::Scalar(255,0,0), CV_FILLED, 8,0);
         blueScreen->editGeometry(mg->getResolution());
         blueScreen->imShow(blue);
         cameraUsed = true;

app/SandboxSetup/projectiongui.ui

@@ -51,7 +51,7 @@
      <x>30</x>
      <y>370</y>
      <width>581</width>
-     <height>101</height>
+     <height>131</height>
     </rect>
    </property>
    <property name="readOnly">
@@ -62,7 +62,9 @@
 &lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
 p, li { white-space: pre-wrap; }
 &lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'Ubuntu'; font-size:11pt; font-weight:400; font-style:normal;&quot;&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;Project a blue screen on the previously selected output to help you setup your beamer and camera manually. Adjust the position and orientation of your beamer to project the blue frame in your sandbox. Then adjust the position and oritentation of your camera to capture the blue screen projected. Try to set your camera, so the camera's point of view above is mostly filled with the blue screen.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;Project a blue screen on the previously selected output to help you setup your beamer and camera manually.&lt;/p&gt;
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;Firstly, adjust the position and orientation of your beamer to project the blue frame in your sandbox. The red dot indicates the center of the blue screen.&lt;/p&gt;
+&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;Then adjust the position and oritentation of your camera to capture the sandbox. Your camera must capture all of the blue screen and must be perpendicular to the sandbox's top.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
    </property>
   </widget>
   <widget class="QLabel" name="label">