How to send data from CANOE to LABVIEW

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  1. as I am new to watch I need help with sending data from client to server. I went through various examples of labview, but each of them also explains transfer of data to the client server. But I need help regardng send data from the server to the client.

  2.i would use the data type variant for sending my data.

  Can someone help me please. Thank you

  Regardless of the meaning. Once you have a connection each end allows it to send data to another. Just create what you want to look like interaction.

  Do you want the client sends a command that request data?
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  Mike...

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• How to send data from c ++ to qml to an another qml.

  Hello

  I'm quite confused about a simple problem, I'm sure. Let me put some of my code and then I'll ask my question

  hand. QML

  // Default empty project template
  import bb.cascades 1.0
  import bb.data 1.0
  
  // creates one page with a label
  
  TabbedPane {
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              Page {
                  id: everyoneFeed
                  ListView {
                      objectName: "FeedView"
                      id: FeedView
  
                      layout: StackListLayout {
                          headerMode: ListHeaderMode.Sticky
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                      listItemComponents: [
                          ListItemComponent {
                              type: "item"
                              DetailFeed {
                              }
                          }
                      ]
                  }
              }
              attachedObjects: [
                  ActivityIndicator {
                      objectName: "indicator"
                      verticalAlignment: VerticalAlignment.Center
                      horizontalAlignment: HorizontalAlignment.Center
                      preferredHeight: 200
                      preferredWidth: 200
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              ]
              onCreationCompleted: {
  
              }
          }
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      Tab {
          title: qsTr("TimeSheet")
          Page {
          }
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      Tab {
          title: qsTr("Calendar")
          Page {
          }
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  }
  

  detailView

  import bb.cascades 1.0
  
  Container {
      layout: StackLayout {
          orientation: LayoutOrientation.TopToBottom // this line stacks everything below
      }
      bottomPadding: 20
      Container { // single row
          id: row1
          // individual row container
          layout: DockLayout {
          }
          preferredWidth: maxWidth
          Container { // container for image
              preferredWidth: 150 //size of image if known
              preferredHeight: 150
              topPadding: 10
              leftPadding: 20
              horizontalAlignment: HorizontalAlignment.Left
              verticalAlignment: VerticalAlignment.Center
              ImageView {
                  preferredWidth: 150 //size of image if known
                  preferredHeight: 150
                  imageSource: "asset:///images/person.jpg" // some image
              }
          }
          // stack labels
          Container { // container for labels
              horizontalAlignment: HorizontalAlignment.Left // align this container to the left
              translationX: 200
              verticalAlignment: VerticalAlignment.Center
              layout: StackLayout {
                  orientation: LayoutOrientation.TopToBottom // this stacks the labels
              }
              Label {                objectName: "firstname"
                  text: "first label"
              }
              Label {
                  text: "second label"
              }
          }
      }
      Divider {
      }
  }
  

  Employee.cpp

  // Default empty project template
  #include "Employee.hpp"
  
  #include 
  #include 
  #include 
  #include 
  #include 
  #include 
  
  #include 
  #include 
  
  using namespace bb::cascades;
  
  QString mQueryUri;
  
  Employee::Employee(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
      mQml = QmlDocument::create("asset:///main.qml").parent(this);
  
      // create root object for the UI
      mRoot = mQml->createRootObject();
  
      // Retrieving my activity indicator
      //mActivityIndicator = mRoot->findChild("indicator");
      //mActivityIndicator->start();
  
      // Retrieving my list from QML
      mListView = mRoot->findChild("dribbbleFeedView");
      GetFeed("everyone");
  
      // set created root object as a scene
      app->setScene(mRoot);
  }
  
  void Employee::GetFeed(QString feedType) {
      // First off we initialize our NetworkManager
      QNetworkAccessManager* netManager = new QNetworkAccessManager();
      if (!netManager) {
          qDebug() << "Unable to create QNetworkAccessManager!";
          emit complete("Unable to create QNetworkAccessManager!", false);
          return;
      }
  
      // First off we initialize our NetworkManager
      netManager = new QNetworkAccessManager();
      if (!netManager) {
          qDebug() << "Unable to create QNetworkAccessManager!";
          emit complete("Unable to create QNetworkAccessManager!", false);
          return;
      }
  
      mQueryUri = "http://mycompany" + feedType;
      // We setup our url
  
      QUrl url(mQueryUri);
      QNetworkRequest req(url);
  
      // Setup the reply and connect to the reply function
      QNetworkReply* ipReply = netManager->get(req);
      connect(ipReply, SIGNAL(finished()), this, SLOT(onReply()));
  }
  
  void Employee::onReply() {
      QNetworkReply* reply = qobject_cast(sender());
  
      QString response;
  
      bool success = false;
      if (reply) {
          if (reply->error() == QNetworkReply::NoError) {
  
              int available = reply->bytesAvailable();
              if (available > 0) {
                  int bufSize = sizeof(char) * available + sizeof(char);
                  QByteArray buffer(bufSize, 0);
                  int read = reply->read(buffer.data(), available);
                  response = QString(buffer);
                  success = true;
                  Q_UNUSED(read);
              }
          } else {
              response =
                      QString("Error: ") + reply->errorString()
                              + QString(" status:")
                              + reply->attribute(
                                      QNetworkRequest::HttpStatusCodeAttribute).toString();
              qDebug() << response;
          }
          reply->deleteLater();
      }
      if (response.trimmed().isEmpty()) {
          response = "Request failed. Check internet connection";
          qDebug() << response;
      }
  
      bb::cascades::GroupDataModel* dm = new bb::cascades::GroupDataModel(
              QStringList() << "id");
  
      dm->setGrouping(bb::cascades::ItemGrouping::None);
  
      // parse the json response with JsonDataAccess
      bb::data::JsonDataAccess ja;
      QVariant jsonva = ja.loadFromBuffer(response);
  
      QVariantList feed = jsonva.toMap()["employee"].toList();
  
      QVariantMap player;
  
      foreach (QVariant v, feed)
      {
          QVariantMap feedData = v.toMap();
          dm->insert(feedData);
      }
  
      mListView->setDataModel(dm);
      mListView->setVisible(true);
  }
  

  OK so here is my question. I load a listview, in my hand, calling another qml, detailview. Given that my PPC is load my json file how can I send what I receive in my datamodel in my detailfeed can I change we tell the label with objectName: "firstname" to change the text for datamodel.name?

  Hope I am clear enough.

  Thank you

  I think that you can access ListItemData in detailView.qml. Say ListItemData.id.

  Why do you add only a mapping in groupdata. I think you need to add all the necessary fields such as firstname and so on. Right?

  bb::cascades::GroupDataModel* dm = new bb::cascades::GroupDataModel(
              QStringList() << "id");
  

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  Hi all

  I have the following problem:

  I use a dll written in Delphi Pascal to transfer data to LabView by using the "Call library function node".

  My Delphi dll contains this class:

  TFlash = class
  Fi: TFileInfo;
  constructor Create;
  procedure LoadFi (Filedir_and_nametring);
  end;

  TFileInfo = record
  IDX:smallint;
  IdxLstSpl:array [0.4] of longint;
  Ms: Word;
  [0.4] SP:array of the word;
  end;

  I created the record datastructure of TFileInfo in a cluster of LabView to have the 'same' variable.

  My plan was to call a DLL Deplhi function with the "call library function node" and pass the address of the folder TFileInfo, so the data would be transmitted to the cluster of LabView.

  When I do a simple delphi dll function as this works because I only spend a small integer to Labview (without reference to the data structure):

  ...

  var data: TFlash;

  ...

  function GetNrOfRows(FilePath:_string):integer; STDCALL;
  Start
  Data: = tflash. Create;
  Data.LoadFi (FilePath); This function returns the number of lines in the selected file.
  Result: = Data.Fi.Idx;
  end;

  When I try to use this procedure instead of the above function, in order to pass the address of the data set structure complex 'Data' (TFileInfo), I am unable to get the information of 'Data' in my Labview cluster:

  procedure LoadFileInfo (FilePath: string;) DataPointer: Pointer); STDCALL;
  Start
  Data: = tflash. Create;
  Data.LoadFi (FilePath);
  DataPointer:=@Data;
  end;

  Parameters of call library function node:

  -stdcall (WINAPI)

  -Run in the UI Thread

  -Function prototype: void LoadFileInfo (PStr FilePath, void * DataPointer);

  * DataPointer--> Type: "adapt the type" and the format of the data: "pointers to the sleeves.

  * FilePath--> Type: 'string', format of the string: "pascal string pointer.

  I'm struggeling with this problem for almost a week now and I can't really find a solution on the forum or google.

  I also read the following posts:

  http://forums.NI.com/NI/board/message?board.ID=170&message.ID=229930&requireLogin=false

  http://forums.NI.com/NI/board/message?board.ID=170&message.ID=77947&requireLogin=false

  http://forums.NI.com/NI/board/message?board.ID=170&message.ID=51245&requireLogin=false

  (or did I miss something in these messages?)

  Hope my explanation is clear.

  THX

  A little further:

  Seems like it's not possible to pass data from Delphi to Labview through a DLL when I create a cluster with 2 bays in it in Labview.

  This part of Delphi, I've had to make in Labview:

  TFileInfo = record
  IDX:smallint; {integer; Convert tool}
  IdxLstSpl:array [0.4] of longint;
  Ms: Word;
  [0.4] SP:array of the word;
  end;

  Instead of using 1 cluster with all the different data in it, I did a unit (1) with my 2 items (smallint and word).

  To pass my data in my tables from delphi to labview, I created another group (2) in the unit (1) with 5 elements of longint (because my delphi is going to 0.4) and another group (3) in the unit (1) with 5 Word elements.

  Right-click on the unit (1) and the clusterorder in the right order. First the smallint, then the longint table, then the word and the Word table.

  When I then use this code in my dll Delphi, IT WORKS! :

  procedure LoadFileInfo (FilePath: string;) DataPointer: PtrTFileInfo); STDCALL;
  Start
  Data: = tflash. Create;
  Data.LoadFi (Copy (FilePath, 2, length (FilePath)-1));         --> I need to cut the first part of the pascal string because it's length, and I only need the string itself
  DataPointer ^: = Data .fi;       --> pass the record structure to the cluster of Labview
  end;

  Thanks for the info Ralf!

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