Problem, the signals and Slots

Similar Questions

• Signals and Slots

  Try to test something after that someone wanted to help with the signals and Slots sorta. I know there is an alternative to this, but I'm trying to understand why this does not work when doing it this way.  It relies, it works but it does not fly... I mean this isn't the trigger of the SLOT feature... Not even sure if she sends a SIGNAL...

  Thanks in advance.

  file:

  // Default empty project template
  #ifndef Testme_HPP_
  #define Testme_HPP_
  
  #include 
  
  namespace bb { namespace cascades { class Application; }}
  namespace bb { namespace cascades { class TouchEvent; }}
  namespace bb { namespace cascades { class Container; }}
  namespace bb { namespace cascades { class ImageView; }}
  
  /*!
   * @brief Application pane object
   *
   *Use this object to create and init app UI, to create context objects, to register the new meta types etc.
   */
  class Testme : public QObject
  {
      Q_OBJECT
  public:
      Testme(bb::cascades::Application *app);
      virtual ~Testme() {}
  public slots:
      void handleTouch(bb::cascades::TouchEvent* tEvent);
  private:
      bb::cascades::Container* rootContainer;
      bb::cascades::ImageView* imgView;
  };
  
  #endif /* Testme_HPP_ */
  

  .cpp file:

  // Default empty project template
  #include "Testme.hpp"
  
  #include 
  #include 
  #include 
  #include 
  #include 
  #include 
  
  using namespace bb::cascades;
  
  Testme::Testme(bb::cascades::Application *app)
  : QObject(app)
  {
      // create scene document from main.qml asset
      // set parent to created document to ensure it exists for the whole application lifetime
      QmlDocument *qml = QmlDocument::create("asset:///main.qml").parent(this);
      QmlDocument *qml2 = QmlDocument::create("asset:///Testingme.qml").parent(this);
  
      // create root object for the UI
      AbstractPane *root = qml->createRootObject();
      // set created root object as a scene
      app->setScene(root);
  
      if (!qml2->hasErrors()) {
          rootContainer = qml2->createRootObject();
  
          if (rootContainer) {
              imgView = rootContainer->findChild("imgView");
  
              if (imgView) {
                  bool res = QObject::connect(imgView,                                        SIGNAL(touch(bb::cascades::TouchEvent*)),
                          this, SLOT(handleTouch(bb::cascades::TouchEvent*)));
                  Q_ASSERT(res);
                  Q_UNUSED(res);
                  fprintf(stderr, "Height: %f and width: %f\n",
                          imgView->preferredHeight(),                                        imgView->preferredWidth());
              } else {
                  fprintf(stderr, "No ImageView\n");
              }
          } else {
              fprintf(stderr, "No root container\n");
          }
      } else {
          fprintf(stderr, "QML2 has errors\n");
      }
  }
  
  void Testme::handleTouch(TouchEvent *tEvent)
  {
      fprintf(stderr, "Touch Touch Touch\n");
  }
  

  hand file. QML:

  // Default empty project template
  import bb.cascades 1.0
  
  // creates one page with a label
  Page {
      Container {
          layout: StackLayout {}
          Label {
              text: qsTr("Hello World")
          }
  
          Testingme {
              id: testingMe
          }
      }
  }
  

  File Testingme.QML:

  import bb.cascades 1.0
  
  Container {
      objectName: "rootContainer"
      horizontalAlignment: HorizontalAlignment.Center
      verticalAlignment: VerticalAlignment.Center
      background: Color.create ("#262626")
  
      ImageView {
          objectName: "imgView"
          imageSource: "asset:///belligerent.png"
          preferredHeight: 200
          preferredWidth: 200
      }
  }
  

  The main file is the one you get when you create a new project of Cascades Standard default. So, what's wrong with this picture? Or of images, other than the fact that I use the png of bellicose blocks file...

  -Edit (this and some formatting).

  I'm using the Simulator, so don't know if it would make a difference. BTW, I even tried to use a checkbox, and which does not trigger anything.

  Well, it works eventually got. I'm still not sure where to check signals during debugging, however.

  Although there are two files QML, the first main QML object is one that should be used. I used the 2nd QML file object that was wrong, even if the image is in the 2nd...

• I am facing a problem with the beep.vi. I have a DAQ program, which acquired the signal and compare it to a threshold value. When a signal is out of range, a Visual and sound alarm has occurred. I use the VI beep.vi to generate the sound.

  I am facing a problem with the beep.vi.  I have a DAQ program, which acquired the signal and compare it to a threshold value. When a signal is out of range, a Visual and sound alarm has occurred. I use the VI beep.vi to generate the sound. Everything works fine except the sound alarm. It gives the table 1 d of type mismatch. I tried to fix this by placing it in a box structure. But it still does not work. If someone could help? Please find attached my VI. Best wishes to all visitors to the Forums of Discussion OR.

  Ihab El-Sayed

  published here: http://forums.ni.com/t5/LabVIEW/Playing-sound-based-on-exceeding-a-threshold-value-1D-array-data/m-p...

• The difference between the strength of the signal and quality?

  Hi all

  According to the Cisco documentation

  Low RF signal strength does not mean the lack of communication.

  The quality of the signal is low means poor communications.

  If someone can explain to me the difference between the power of the signal and the quality of the signal?

  In accordance with my AP home I see that this signal strength is measured in numbers like 50% or 100%.

  But what is the quality of the signal and how to measure me?

  Thank you

  Mahesh

  Big question...

  First, let's look at the notion of signal quality and strength... Suppose for a minute you're front row at a rock concert right next to the speakers. Sound is loud, you can't hear anything else that scream. It is an example of a strong signal but poor quality.

  As for the signal and the noise of measurement or should we say quality of signal. Providers sometimes give you a % or dB scale when ranking signal. You can't really do headers or tails of the % scale because each vendor has % different measures. But check your access point, because you will be able to change in dB.

  Look at dBm. At the moment my client shows:

  Signal - 59 dBm

  Noise - 98 dBm

  The dB scale is simple. More PB the STRONGEST signal. You'll see - 59 of the signal is good, in fact, I'm about 50 feet from the AP. If you are under the ap you will get as a - 30ish. Noise, we do not want to be noisy, if we want to see the noise to-100. More low is the dB of noise as loud noise.

  So we're back out the example above. Next to the speaker, you're showing tell - 30dBm, but your noise can be as - 70dBm...

  Does make sense?

  Normally, you want to see your signal not exceeding 67 - not for voice or - 76 for the data. And your noise should be greater than-90.

• Mapping to the signals and initial Conditions in a simulink model

  Hello world.  I am pretty competent with old Simulation Interface Toolkit (SIT) and I am moving to Veristand.  I have some basic questions that I think that know the answer, but who want to do some checks.

  First of all, when you map signals, such as the output of a block check, is it possible to make them available for mapping other that mark the test points?  At the bottom of this page, it is a bit ambiguous, but it seems to suggest that if I disable optimization option will appear any sudden without needing me to mark all test points.  The I am referring to something specific is the following, "Certain optimizations that you activate in Simulink can make a not available in NI VeriStand signal. You can disable these options for the entire model to all the signals available to probe, but the model memory footprint increases accordingly.  Alternatively, you can mark individual signals as test points in Simulink to maintain a very reduced memory footprint by keeping test-point available signals to probe. »

  My second question is in what regards the "initial condition" parameters  There was a problem in SIT (although National Instruments has not agree with me at the time that it was a problem), where you can map the controls to these settings, but at the moment where you have been given access to the model, the initialize function had already been called, which means that your maps were useless.  I see that I can still map to these settings in Veristand, and I wonder if the same problem exists.  I'm not quite to the point where I can start trying to change these but I'm hoping to avoid the days of debugging, I lost on this whole by learning to SIT.

  As a follow-up on the second question, to SIT, I could find the C code (located in nidll_main.c) that was called whenever the 'play' button and add a second call to the initialize function.  So let me change the initial conditions without recompiling my entire model which, in my case, would be unworkable. If this problem still someone was able to implement a similar solution?

  Optimization, you can disable in Simulink (TM) I believe is called Signal storage reuse. To my knowledge you either need to use individual test on son points, or you must disable overall re-use of storage of signal for your model.

  Regarding the second question, the question still exists in NI VeriStand. This is something that we are aware of what we expect to address in a future version of NI VeriStand. The workaround you describe might possibly work if you do enough digging in the C code. Currently VeriStand charge and then initializes the model at the same time, and initializing code can read the values of model parameter. If you check out this code and move to the first call to the main function of the calendar, you could allow for the adjustment of the parameters of the model before the model starts.

• Can I connect wireless and wired to the Airport Extreme even? My House has plaster walls that inhibit the signal and I move to my office.

  I have a good Wi - fi network at home using an Airport Extreme and Airport Express, but am moving my office on the other side of the House. The walls are plaster that inhibit the signal. Can I connect another Express to my extreme via an Ethernet cable for the office. I still maintain the wireless network. Thanks for your help.

  Yes, it's the right way to do things.

  Only the express will not extend the wireless... you create a wireless network of the same name and security settings... This is called roaming network.

• Problem: the mailbox and a link to records in records storage

  I can't save the attachments of my emails into folders in "my documents" - I used to be able to. How can I fix? A box opens and the operation starts, but stops, and a sign pops up saying: "this document cannot be saved." It makes no difference, which is in the attachment - same problem with everything.

  Hi Angficat,

  ·         Since when are you facing this problem?

  ·        You did changes to the computer before this problem started?

  ·        What is the file extension of the attachments you are unable to open?

  ·        You use any e-mail like Outlook ot Outlook Express client or are you using Internet Explorer?

  Step 1

  To help us identify the problem, you can try to transfer the e-mail with attachment to a different e-mail account and check to see if you can open the attachment.

  Step 2

  You can try to change the desktop default saving location and try to download the file and check if it helps. You can also try to download any program from the Internet and check if it can be downloaded on the computer and saved.

  Step 3

  If this happens in Internet Explorer, you can try settings to optimize Internet Explorer on your computer and check if it helps you solve the problem. Access the link below and follow the steps to optimize Internet Explorer.

  http://support.Microsoft.com/kb/936213

  You can also try to reset the Internet Explorer default settings and check if it helps. Follow method 4 in the article above to reset Internet Explorer.

  I hope this helps. Let us know the result.

  Thank you and best regards,

   

  Srinivas R

  Microsoft technical support.

  Visit our Microsoft answers feedback Forum and let us know what you think.

• pix basic problem the incoming and outgoing traffic.

  I have a problem with the ping command. I can ping to workstations on the network 192.168.100.x but I can not ping to the output interface (e0) on the same network.

  The second problem is that I can ping from outside to inside, ive set the ACLs and static route but did not work.

  I just want to pc1 to be able to get through pix for pc 2 and vice versa. Please give me an example of configuration.

  Here is the config:

  6.3 (4) version PIX

  interface ethernet0 car

  Auto interface ethernet1

  Automatic stop of interface ethernet2

  ethernet0 nameif outside security0

  nameif ethernet1 inside the security100

  nameif ethernet2 intf2 interieure4

  activate the password xxx

  passwd xxx

  pixfirewall hostname

  fixup protocol dns-length maximum 512

  fixup protocol ftp 21

  fixup protocol h323 h225 1720

  fixup protocol h323 ras 1718-1719

  fixup protocol http 80

  fixup protocol rsh 514

  fixup protocol rtsp 554

  fixup protocol sip 5060

  fixup protocol sip udp 5060

  fixup protocol 2000 skinny

  fixup protocol smtp 25

  fixup protocol sqlnet 1521

  fixup protocol tftp 69

  names of

  access-list acl_out permit icmp any one

  pager lines 24

  Outside 1500 MTU

  Within 1500 MTU

  intf2 MTU 1500

  outdoor IP 192.168.100.1 address 255.255.255.0

  IP address inside 192.168.1.1 255.255.255.0

  No intf2 ip address

  alarm action IP verification of information

  alarm action attack IP audit

  history of PDM activate

  ARP timeout 14400

  Global (outside) 1 192.168.100.150 - 192.168.100.200 netmask 255.255.255.0

  NAT (inside) 1 0.0.0.0 0.0.0.0 0 0

  Access-group acl_out in interface outside

  Timeout xlate 03:00

  Timeout conn 01:00 half-closed 0:10:00 udp 0: CPP 02:00 0:10:00 01:00 h225

  H323 timeout 0:05:00 mgcp 0: sip from 05:00 0:30:00 sip_media 0:02:00

  Timeout, uauth 0:05:00 absolute

  GANYMEDE + Protocol Ganymede + AAA-server

  AAA-server GANYMEDE + 3 max-failed-attempts

  AAA-server GANYMEDE + deadtime 10

  RADIUS Protocol RADIUS AAA server

  AAA-server RADIUS 3 max-failed-attempts

  AAA-RADIUS deadtime 10 Server

  AAA-server local LOCAL Protocol

  No snmp server location

  No snmp Server contact

  SNMP-Server Community public

  No trap to activate snmp Server

  enable floodguard

  Telnet timeout 5

  SSH timeout 5

  Console timeout 0

  Terminal width 80

  Cryptochecksum:xxx

  : end

  Hello!

  If you are not able to ping to interface external of the pix from the inside of the host, but able to ping to the host outside the internal host. It is very good. As it is the safety device designed in pix, ASA. You cannot ping the ip address of the pix of the host connected to the other interface.

  Regarding the other question, please try the following command:

  Global 1 interface (outside)

  static (inside, outside)

  WR mem

  CL xlate

  Where is the free public ip address in the pool which can be used to map the pc1 inside.

  Another configuraiton seems perfect. If you have any questions, feel free to contact me.

  Thank you best regards &,.

  Harish Tandon

  [email protected] / * /.

• Unable connect 2 classes of signals and Slots

  I am transferring from one category to the other channels.

  Their memories are:

  .hpp files------------
  class A::public QObject{
  Q_OBJECT
  
  signals:
  void emitMsg(QString* msg);
  }
  
  class B::public QObject{
  signals:
  void emitA(QString* msgA);
  public slots:
  void logMsg(QString* msg);
  }
  
  ---------.cpp files
  
  classB::classB(){
  bool temp= connect(objB,SIGNAL(emitA(QString*)),this,SLOT(logMsg(QString*)));
  
  qDebug()<<"value="<
  But even running in the device debug mode Dev Alpha, the application displays a value in the log messages, or moves out of the screen dark splash.
  Please adivse, what is missing from the other code?
  Is there a way by which the slots and signals of different classes could be connected to data transfer?
  			 
  Create a Downloader object?
  (BTW, I always initialize pointers to 0 in the initializer list.)  Who does this kind of obvious thing, and it has the same thing for debug and release)
  Stuart
  		   

• Why connecttng signals and slots of an element of action gets segfault

  I add an action item to a page. For some reasong I had to disconnect the item, delete and re-create, and then reconnect it. But I am getting exception when I try to pull the plug. If I omit the disconnection then I get exception when connecting. My code is below

    if(addAllRules)
      {
          disconnect(addAllRules,SIGNAL(triggered()),this,SLOT(onTriggeredAddRuleActionAllRules()));
          delete(addAllRules);
      }
      addAllRules =  ActionItem::create().title("Add Rule").enabled(true);
      allRulesPage->addAction(addAllRules, ActionBarPlacement::OnBar);
      connect(addAllRules,SIGNAL(triggered()),this,SLOT(onTriggeredAddRuleActionAllRules()));
  

  Have you tried cleaning and reconstruction project?

  You will need to find the exact location of the crash using a debugger or newspapers, or analyze a dump core after accident.

  This can also occur due to memory corruption. If the memory is damaged from somewhere, the accident can happen in completely independent place. In this case, try commenting on most of the features of the application until the QTimer started working restaurant then step by step.

• Merge the signals and waveform graph

  Hi all

  I ask you what follows, because I have little knowledge about labview

  I have a function of merging signals which should take 7 signal as input. but I have no idea how to do to see the 7 signal on a waveform graph outputs. I want to show the 7 signals each of them on a waveform graph. (like research in the panet before I would see an array of unique waveform showing the 7 signals).

  can you guys help me?

  Thank you.

  I'm confused for... Please find attached a really simple screw that does the job you want...

  Are you tracing the curve of a graph or a chart? My VI control is a chart.

• I have iphone 5 c I wark his quote in Egypt at etisalat misr sim card I see the signal and does not open my camera

  Please I need answer to my telephone number in Egypt

  Post edited by: Personal Information edited by host >

  If the phone has been unlocked officially for use with another provider?

  Do you get any error messages?

• How to create the method own slot in QT for blackberry Playbook

  Hi all

  After two days of work-around, I can successfully develop the project of the QT in Qnx IDE for blackberry playbook 2.0.

  But now I have a problem to create the method of the slot to call on the click event of the specific button,

  Here is my code.

  #include

  #include
  #include
  #include
  #include

  slots machines
  void clickedSlots();

  int main (int argc, char * argv []) {}

  qputenv ("QT_QPA_FONTDIR", "/ usr/fonts/font_repository/monotype");
  QCoreApplication::addLibraryPath ("app/native/lib");
  QApplication app (argc, argv);

  QWidget window;
  Window.Resize(1024, 600);
  window.setWindowTitle (QString::fromUtf8 ('QPushbutton Background'));
  one click = new QPushButton ("Click Me");
  Click on-> setToolTip ("Thanks");
  Click on-> setMaximumHeight (100);
  Click on-> setGeometry (400, 100, 100, 40);
  QObject::connect (click, SIGNAL (clicked ()), & app, SLOT (clickedSlots ()));

  QPalette * palette1 = new QPalette();
  Palette1-> setColor (QPalette::Button, Qt::blue);
  Click on-> setPalette(*palette1);

  QPushButton * leave = new QPushButton ("Quit");
  QObject::connect (quit, SIGNAL (clicked ()), & app, SLOT (quit ()));

  QPalette * palette2 = new QPalette();
  Palette2-> setColor (QPalette::Background, Qt::green);
  Exit-> setPalette(*palette2);
  Exit-> setGeometry (200, 100, 100, 40);
  QVBoxLayout layout = new QVBoxLayout (& window);
  layout-> setGeometry (QRect (0, 0, 1024, 600));
  layout-> addWidget (click);
  layout-> addWidget (quit);

  Window.Show ();
  Return app.exec ();
  }

  void clickedSlots() {}
  QMessageBox msgBox.
  msgBox.setWindowTitle ("Hello");
  msgBox.setText ("You Clicked");
  msgBox.show ();
  msgBox.exec ();
  }

  Please help me with this problem. I had started to develop in QT before 2 days only. I'm not familiar with the development of QT.

  Thanks in advance.

  bskania.

  You have the chance, I'm feeling generous today.

  I fixed your code. You should really read the Qt documentation, it's fantastic. Here, it's a good start for the signals and Slots.

  http://Qt-project.org/doc/Qt-4.8/signalsandslots.html

  Mark this message as the solution and give me one as you please.

  main.cpp

  #include 
  
  #include 
  #include 
  #include 
  #include 
  #include "myslots.h"
  
  int main(int argc, char *argv[]) {
      qputenv("QT_QPA_FONTDIR", "/usr/fonts/font_repository/monotype");
      QCoreApplication::addLibraryPath("app/native/lib");
      QApplication app(argc, argv);
  
      QWidget window;
      window.resize(1024, 600);
      window.setWindowTitle(QString::fromUtf8("QPushbutton Background"));
      QPushButton *click = new QPushButton("Click Me");
      click->setToolTip("Thanks");
      click->setMaximumHeight(100);
      click->setGeometry(400, 100, 100, 40);
      myslots a;
      QObject::connect(click, SIGNAL(clicked()), &a, SLOT(clickedSlot()));
  
      QPalette* palette1 = new QPalette();
      palette1->setColor(QPalette::Button, Qt::blue);
      click->setPalette(*palette1);
  
      QPushButton *quit = new QPushButton("Quit");
      QObject::connect(quit, SIGNAL(clicked()), &app, SLOT(quit()));
  
      QPalette* palette2 = new QPalette();
      palette2->setColor(QPalette::Background, Qt::green);
      quit->setPalette(*palette2);
      quit->setGeometry(200, 100, 100, 40);
      QVBoxLayout* layout = new QVBoxLayout(&window);
      layout->setGeometry(QRect(0, 0, 1024, 600));
      layout->addWidget(click);
      layout->addWidget(quit);
      window.show();
      return app.exec();
  }
  

  myslots.h

  #include 
  #include 
  #include 
  
  class myslots : public QObject {
      Q_OBJECT
  
      public:
          myslots() { };
  
      public slots:
          void clickedSlot() {
              QMessageBox* msgBox = new QMessageBox();
              msgBox->setWindowTitle("Hello");
              msgBox->setText("You Clicked " + ((QPushButton*) sender())->text());
              msgBox->exec();
          };
  };
  

  myslots. Pro

  TARGET = myslots
  DEPENDPATH += .
  INCLUDEPATH += .
  HEADERS += myslots.h
  SOURCES += main.cpp
  

  Put all these files in the same folder, run qmake in there, it will produce a Makefile. Run make and it comes out a binary executable called myslots. That and your code works.

  I don't have a lot of changes, I'll let you step through the code yourself to find out what I did. Look at the documentation for help.

  I have not tested this Momentics, nor Alpha PlayBook/Dev. But I'm 100% sure the code works, since I ran it myself.

• QML does not recognize the custom parameters of the signal object.

  Here is my sample code to test by passing an object custom c ++ qml.

  My custom object:

  class TestObject {}

  public:

  QString testString;

  TestObject() {testString = 'Hello' ;}

  };

  ...

  signals:

  void testErreur (TestObject * testObject);

  I declare it and send the singal of c ++

  Q_DECLARE_METATYPE (TestObject);

  ...

  qRegisterMetaType('TestObject');

  ...

  issue of testError (newTestObject ());

  and expect to receive the onTestError with the testObject setting

  He compiled and can receive the onTestError in qml slot, but it generates an error running this

  QMetaProperty::read: Unable to handle the kind of data not saved ' TestObject * "property"QDeclarativeBoundSignalParameters::testObject ".

  Asset:///testSreen.QML:123: error: unknown method parameter type: TestObject *.

  I did a couple of hours of looking on the forum but found no solution.  Hope that developers who have experience on the similar question can help out.

  Thank you

  Tyler

  Thanks Andrey,

  I changed it to Q_DECLARE_METATYPE(TestObject *); but still have the same error.

  The code that I showed is in fact to reduce the problem.  The actual design is to have a c ++ based customControl in the qml and I plan receive the signal and proceed the testObject to my c ++ customControl and release it there.

• Improve the signal from the router

  Hello, I need a Wi - Fi Range Extender, I take the powers a little signal.

  The technology of these accessories and take a signal and strengthen it as a router or a switch-> Range Extender WiFi-> and the client has an attenuation of the signal?
  It remains the same as that which carries the router?
  It strengthens it so that you have the strongest signal for customers.

  My problem.
  Router standar Telecom in an apartment of the third floor of a building where the ground floor it is local (shop with three slides) who must pick up the signal. Now that with the router, the signal arrives but, weak, and there is a local point where the signal and the stronger, enough to be able to navigate with a non-performing smartphone.

  We would like to put a Range Extender Wi - Fi to the strongest step to bring it to the customer.

  Your WiFi Range Extender are all uquali for the work that I do, or I have to evaluate some of the same characteristics.

  I explained enhancement, signal loss?

  Thank you.

  Hello creatt

  An Extender, you should get better report you would like to place somewhere in the middle where you need wifi and the router to get the best coverage.

  DarrenM