FP SDK 5.14. Rapid Data Value Changed Event.

SAV

Dear sirs,

Could someone shed some light to the the logic of the rapid data changing event triggering.

I have a PERS variable and have a subscribtion on the data changing. 

Here it is:

        public void SubscribeMethodOnRapidData(string rdName,    Action<ControllerDataToComponent> method)

        {

             _rapidsMap.Add(rdName, method);

            _controller.Rapid.GetRapidData("T_ROB1", "ProgressModule", rdName).ValueChanged += rd_changed;

        }

  private void rd_changed(object sender, DataValueChangedEventArgs e)

        {

            if (sender is RapidData)

            {

                MessageBox.Show("RapidData has changed!");

                string rdName = ((RapidData)sender).Name;

                Action<ControllerDataToComponent> method = _rapidsMap[rdName];

                ControllerDataToComponent sgnToComponent = new ControllerDataToComponent();

                sgnToComponent.dataValue = GetRapidData(rdName).ToString();

                method.Invoke(sgnToComponent);

            }

            else

                MessageBox.Show("sender is not RapidData!");

        }

During the execution the value of the rapid variable changes many times, but I have no event triggering.  Why? What I had missed? It works perfect with the signals...

Thank you in advance...

P.S. I'm using the virtual controller

SAV2012-09-03 06:57:42

John Wiberg

Hi SAV,

Got your message so here I am

 

First here is an example which I ran just now which works, you need three buttons and a TpsLabel, and then the declaration of the ctrl and myRD needs to be at the top of the class declaration.

[code]

        private void btnSub_Click(object sender, EventArgs e)
        {
            myRD = ctrl.Rapid.GetRapidData("T_ROB1", "Module1", "myNum");
            this.myRD.ValueChanged += myRD_ValueChanged;
        }
        private void myRD_ValueChanged(object sender, DataValueChangedEventArgs e)
        {
            this.Invoke(new EventHandler(ToTheLabel), sender, e);
        }
        private void ToTheLabel(object sender, System.EventArgs e)
        {
            if (this.tpsLabel1.Text == "")
            {
                this.tpsLabel1.Text = DateTime.Now.ToString() + " : " + myRD.Value.ToString();
            }
            else
            {
                this.tpsLabel1.Text = this.tpsLabel1.Text + "
" + DateTime.Now.ToString() +  " : " + myRD.Value.ToString();
            }
        }
        private void btnClear_Click(object sender, EventArgs e)
        {
            tpsLabel1.Text = "";
        }

[/code]

 

Regarding your code, first your use of the windows messagebox is a no-no, you should be using the GTPUMessageBox instead.

 

I'll go through the rest later.

John Wiberg

Sorry, had to do some other stuff in between. OK lets look at your code.
1) Can't see your other stuff, so I really can't say regarding your calls like _rapidsMap
2) In the event [rd_changed] you have code that make UI changes (MessageBox.Show) before the invoke. Wouldn't it be better to just send along the sender and e and then do the strings and sgnToComponent execution in the invoked method. See Working with RAPID data and Controller events and threads
In my example above you see that I use that in the [myRD_ValueChanged], which invokes [ToTheLabel].
3) what do you use the delegate for?
Action<ControllerDataToComponent>
Can't make sense of that.

SAV

You was right, it works. The key point was the following: the variable myRd must be not local. 

Thank you, John. 

lubosko105

Hi guys.
is it possible to fire event also for 'Signal' (I/O system), but not only PERS Rapid variable?