One signal to two window

[kdbcz]

It is not working for me. "....was not declared in this scope"
How can I pass a variable to a designer generated ui object?

[andreyc]

Here is an example based on the sources you posted before.
See my comments below started with // <<

• MainWindow.h
  @
  class MainWindow : public QMainWindow
  {
  ...
  rtk_thread* worker; // << Declare worker in MainWindow
  RoverSatView* roverSatView;
  };
  @

• MainWindow.cpp
  @
  MainWindow::MainWindow(QWidget *parent)
  : QMainWindow(parent)
  , ui(new Ui::MainWindow)
  {
  ui->setupUi(this);

  QThread* rtkthread = new QThread;
  worker = new rtk_thread; // << Initialize it in ctor
  ...
  worker->moveToThread(rtkthread);
  connect(rtkthread, SIGNAL(started()), worker, SLOT(run()));
  connect(worker, SIGNAL(finished()), rtkthread, SLOT(quit()));
  connect(worker, SIGNAL(finished()), worker, SLOT(deleteLater()));
  connect(rtkthread, SIGNAL(finished()), rtkthread, SLOT(deleteLater()));
  rtkthread->start();
  }

void MainWindow::createRoverSatView()
{
roverSatView = new RoverSatView(worker, this); // << pass it to RoverSatView
...
}
@

• RoverSatView.h
  @
  class RoverSatView : public QWidget
  {
  Q_OBJECT
  public:
  RoverSatView(rtk_thread* rtkWorker, QWidget *parent = 0);
  // << ctor accepts the worker from MainWindow

  protected:
  void paintEvent(QPaintEvent *event);

  private slots:
  void slot_rtk_rover_sat_azel_in(const SatList &sats);

  private:
  SatList satellites;
  rtk_thread* worker; // << it will keep worker from MainWindow
  };
  @

• RoverSatView.cpp
  @
  RoverSatView::RoverSatView(rtk_thread* rtkWorker, QWidget* parent)
  : QWidget(parent)
  , worker(rtkWorker) // << initialize using worker from MainWindow
  {
  // Initialize the Qt magic
  connect(worker, SIGNAL(rtk_rover_sat_azel(SatList)),
  this, SLOT(slot_rtk_rover_sat_azel_in(SatList)));
  }
  @

[kdbcz]

Thank You for Your help!
It is working now in a window, but I would like to add this RoverSatView to a tab of a tabwidget which is created in the creator. Is it possible, or I have to create the tabwidget in the code?

[andreyc]

You can use "QTabWidget::addTab()":http://qt-project.org/doc/qt-5/qtabwidget.html#addTab to put your widget into generated QTabWidget

[kdbcz]

Hello,

This is working:
@connect(worker,SIGNAL(active_window(double)),this,SLOT(slot_active_window(double)));@

This is not working:
@connect(this,SIGNAL(active_window(double)),worker,SLOT(slot_active_window(double)));@

Both in same place. I want to connect the thread (worker) and a window (this) in both direction.
Why the second not working? Or I have to put the "connect..." to the SLOT side?

[andreyc]

What do you mean "is not working".
Compiler error or run-time error?
Are there any run time messages on a console?
Could you show a declaration of the signals and the slots in both classes.

[kdbcz]

No error and no messages, just the value is not send or receive from MainWindow to worker. From worker to MainWidow working, value send and receive.
@
class rtk_thread:public QObject
{
Q_OBJECT
public:
rtk_thread();
~rtk_thread();

signals:
void active_window(double);

private slots:
void slot_active_window(double);

};@

@class MainWindow : public QMainWindow
{
Q_OBJECT

public:
explicit MainWindow(QWidget *parent = 0);
~MainWindow();

 Ui::MainWindow *ui;

 QDialog *win_GPS;
 rtk_thread* worker;

public slots:

private slots:
void slot_active_window(double);

signals:
void active_window(double);

private:
};@
MaiWidow.cpp
@MainWindow::MainWindow(QWidget *parent) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);

QThread* rtkthread=new QThread;
worker=new rtk_thread;
win_GPS = new GPSwindow(worker);

worker->moveToThread(rtkthread);
connect(rtkthread, SIGNAL(started()), worker, SLOT(run()));
connect(worker, SIGNAL(finished()), rtkthread, SLOT(quit()));
connect(worker, SIGNAL(finished()), worker, SLOT(deleteLater()));
connect(rtkthread, SIGNAL(finished()), rtkthread, SLOT(deleteLater()));
rtkthread->start();
connect(this,SIGNAL(active_window(double)),worker,SLOT(slot_active_window(double)));
connect(worker,SIGNAL(active_window(double)),this,SLOT(slot_active_window(double)));
}@