Form inputText select in the tree in the pop-up dialog box

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  Native Subforums have no useful information on this subject. Any help is greatly appreciated

  Hello again, here's the example as promised.

  To use the native filebrowse dialog box, the native code must run in its own thread to prevent the user interface in the Cascades to block. This is achieved by encapsulating all the dialog box code in a class derived from QThread.  The class I wrote is called FileBrowseDialog

  FileBrowseDialog.hpp

  #ifndef FILEBROWSEDIALOG_HPP_
  #define FILEBROWSEDIALOG_HPP_
  
  #include 
  #include 
  #include 
  
  /*
   * The file browse dialog displays a dialog to browse and select
   * files from shared folders on the system.
   */
  class FileBrowseDialog : public QThread
  {
      Q_OBJECT
  
      /*
       * QML property to allow multiple selection
       */
      Q_PROPERTY(bool multiselect READ getMultiSelect WRITE setMultiSelect)
  
      /*
       * QML property to read the selected filenames
       */
      Q_PROPERTY(QVariant filepaths READ getFilePaths)
  
      /*
       * QML property to set or get the file filters. This is an
       * list array variant.
       */
      Q_PROPERTY(QVariant filters READ getFilters WRITE setFilters)
  public:
      /*
       * Ctor and Dtor
       */
      FileBrowseDialog(QObject* parent = 0);
      virtual ~FileBrowseDialog();
  
      /*
       * Exposed to QML to start the run loop which creates and displays the dialog.
       * The dialog is shown until a button is clicked.
       */
      Q_INVOKABLE void show();
  
  public:
      /*
       * Getter for the selected filenames QML property
       */
      QVariant getFilePaths() const;
  
      /*
       * Setter and Getter for the filters QML property
       */
      QVariant getFilters() const;
      void setFilters(QVariant const& value);
  
      /*
       * Getter and Setter for the multiselect QML property
       */
      bool getMultiSelect() const;
      void setMultiSelect(bool value);
  
  signals:
      /*
       * Signal emitted when the OK button has been clicked on the browse dialog
       * The OK button is not enabled unless a file is selected
       */
      void selectionCompleted();
  
      /*
       * Signal emitted when the cancel button has been clicked on the browse dialog
       */
      void selectionCancelled();
  
  protected:
      /*
       * Implements the run loop. Dialog stays open until a button is clicked.
       */
      virtual void run();
  
  protected:
      dialog_instance_t m_dialog;
      bool m_multiSelect;
      QVariantList m_filePaths;
      QVariantList m_filters;
  };
  
  #endif /* FILEBROWSEDIALOG_HPP_ */
  

  FileBrowseDialog.cpp

  #include "FileBrowseDialog.hpp"
  #include 
  #include 
  
  FileBrowseDialog::FileBrowseDialog(QObject* parent)
      : QThread(parent)
      , m_multiSelect(false)
  {
      m_filters.push_back(QString("*.*"));
  }
  
  FileBrowseDialog::~FileBrowseDialog()
  {
  }
  
  void FileBrowseDialog::show()
  {
      if (!isRunning())
      {
          m_filePaths.clear();
          start();
      }
  }
  
  QVariant FileBrowseDialog::getFilePaths() const
  {
      return m_filePaths;
  }
  
  bool FileBrowseDialog::getMultiSelect() const
  {
      return m_multiSelect;
  }
  
  void FileBrowseDialog::setMultiSelect(bool value)
  {
      m_multiSelect = value;
  }
  
  QVariant FileBrowseDialog::getFilters() const
  {
      return m_filters;
  }
  
  void FileBrowseDialog::setFilters(QVariant const& value)
  {
      m_filters = value.toList();
      qDebug() << "filter count: " << m_filters.count();
  }
  
  void FileBrowseDialog::run()
  {
      bps_initialize();
  
      //request all dialog events
      dialog_request_events(0);
      if (dialog_create_filebrowse(&m_dialog) != BPS_SUCCESS)
      {
          qDebug() << "Failed to create file browse dialog.";
          emit selectionCancelled();
          return;
      }
  
      //set the selection filters
      if (m_filters.count() > 0)
      {
          char** ext = (char**)new char[m_filters.count()*sizeof(char*)];
          int i = 0;
          for (QVariantList::iterator it = m_filters.begin(); it != m_filters.end(); ++it, ++i)
          {
              QString filter = it->toString();
              if (!filter.trimmed().isEmpty())
              {
                  int length = (filter.length() + 1) * sizeof(char);
                  ext[i] = new char[length];
                  strncpy(ext[i], filter.toAscii(), length);
              }
          }
          if (dialog_set_filebrowse_filter(m_dialog, (const char**)ext, m_filters.count()) != BPS_SUCCESS)
          {
              qDebug() << "unable to set file browse dialog extensions";
          }
          for (i = 0; i < m_filters.count(); i++)
          {
              delete ext[i];
          }
          delete ext;
      }
  
      if (dialog_show(m_dialog) != BPS_SUCCESS)
      {
          qDebug() << "Failed to show file browse dialog.";
          dialog_destroy(m_dialog);
          m_dialog = 0;
          emit selectionCancelled();
          return;
      }
  
      bool shutdown = false;
      while (!shutdown)
      {
          bps_event_t* event = NULL;
          bps_get_event(&event, -1);    // -1 means that the function waits
          // for an event before returning
  
          if (event)
          {
              if (bps_event_get_domain(event) == dialog_get_domain())
              {
                  //0=ok, 1=cancel
                  int selectedIndex = dialog_event_get_selected_index(event);
  
                  if (selectedIndex == 1)
                  {
                      int count;
                      char** filepaths;
                      if (BPS_SUCCESS == dialog_event_get_filebrowse_filepaths(event, &filepaths, &count))
                      {
                          for (int i = 0; i < count; i++)
                          {
                              qDebug() << "selected file: " << filepaths[i];
                              m_filePaths.push_back(QString(filepaths[i]));
                          }
                          bps_free(filepaths);
                      }
                      emit selectionCompleted();
                  }
                  else
                  {
                      emit selectionCancelled();
                  }
  
                  qDebug() << "Got file browse dialog click";
                  shutdown = true;
              }
          }
      }
  
      if (m_dialog)
      {
          dialog_destroy(m_dialog);
      }
  }
  

  This class derives from QObject (by QThread) which means that it can be used by QML when it exposes properties and signals. The FileBrowseDialog class has 3 properties

  -multiple selection: a Boolean flag indicating if single or multiple selection is allowed

  -filepaths: a read only value that returns the list of files selected

  -Filters: a read/write value is where you can specify one or more filters to file (for example, ".doc", "*.jpg") etc.

  The next part is how you call the FileBrowseDialog through the QML. To do this, we must inform the QML of the FileBrowseDialog page. This is done in the App class via the qmlregistertype code.

  App.cpp

  #include 
  #include 
  #include 
  
  #include "app.hpp"
  #include "FileBrowseDialog.hpp"
  
  using namespace bb::cascades;
  
  App::App()
  {
      qmlRegisterType("Dialog.FileBrowse", 1, 0, "FileBrowseDialog");
      QmlDocument *qml = QmlDocument::create("main.qml");
      qml->setContextProperty("cs", this);
  
      AbstractPane *root = qml->createRootNode();
      Application::setScene(root);
  }
  

  The QML is now ready to be able to use the FileBrowseDialog. The example below is a page complete qml which has a button and a label. When we click on the FileBrowseDialog button is open, and all selected files will appear in the label.

  Main.QML

  import bb.cascades 1.0
  import Dialog.FileBrowse 1.0
  
  Page {
      content: Container {
          Label { id: filebrowseDialogLabel }
          Button {
              text : "File Browse Dialog"
              onClicked: {
                  filebrowseDialog.show();
              }
          }
          attachedObjects: [
              FileBrowseDialog {
                  id: filebrowseDialog
                  multiselect : true
                  filters : ["*.doc","*.jpg","*.txt"]
                  onSelectionCompleted: {
                      if(filebrowseDialog.filepaths.length>0)
                          filebrowseDialogLabel.text = filebrowseDialog.filepaths[0];
                      else
                          filebrowseDialogLabel.text = "no file selected";
                  }
                  onSelectionCancelled: {
                      filebrowseDialogLabel.text = "file browse dialog was cancelled";
                  }
              }
          ]
      }
  }
  

  And it's pretty much just invoke the native dialog file navigation in stunts. Please note save the file would follow a similar model, but I found that this dialog box was not particularly useful because it displays only a simple dialogbox with a text file name entry.

  See you soon

  Swann

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