[kde-edu]: Problem with QVariant on Rocs project (help request)

[Tomaz Canabrava]

well, that helped the program not-to-crash, but it still doesn't works.
new code

void FileArea::createNewScript()
{
   KTextEditor::Editor *e = _mainWindow->editor();
   KTextEditor::Document* d = e -> createDocument(0);
   d->setMode("JavaScript");
   addScript(d->documentName(), d);
}

void FileArea::addScript(const QString& name, KTextEditor::Document* data)
{
   QTreeWidgetItem *scriptItem = new QTreeWidgetItem(_scriptFolder, ScriptRole);
   scriptItem->setIcon(0, KIcon("file-new"));
   scriptItem->setText(0, name);
   scriptItem->setData(0, ScriptRole, data); // ScriptRole = UserType+1
    _mainWindow->changeActive(scriptItem);
}

void MainWindow::changeActive(QTreeWidgetItem * item)
{
  switch(item->type())
  {
     case FileArea::ScriptRole : changeActiveScript(item); break; //
UserType + 1
     case FileArea::GraphRole  : changeActiveGraph(item);  break; //
UserType + 2
  }
}



void MainWindow::changeActiveScript(QTreeWidgetItem *item)
{
  KTextEditor::Document *d = 0;

  //! NEVER GETS INSIDE OF THE IF.
  //! Cannot Convert the data to a KTextEditor::Document*
  //! But the data *IS* a KTextEditor::Document*
  //! =/ *frustrated*

  if (item->data(0,FileArea::ScriptRole).canConvert<KTextEditor::Document*>()
) {
    d = item->data(0, FileArea::ScriptRole).value<KTextEditor::Document*>();
    _scriptingArea -> setDocument( d );
    guiFactory()->addClient(_scriptingArea->view());
  }

  // _scriptingArea -> setDocument(0); outside of the if will work,
  // and create a new document, but I want to restore a previously created one.
  // any help is apreciated.
}






On Wed, Aug 13, 2008 at 4:33 PM, Andreas Ramm <psychobrain at gmx.net> wrote:

> Try using item->data(0,
> FileArea::ScriptRole)).value<KTextEditor::Document*>()
> to access your data and item->data(0,
> FileArea::ScriptRole)).canConvert<KTextEditor::Document*>() to check if you
> actually have that type inside QVariant. Note the template syntax in both
> of
> those methods. Other helpful methods when dealing with QVariant are type()
> and typeName() which help you finding out what a QVariant contains.
>
> Andreas
>
> On Thu, 14 Aug 2008 02:52:48 am Tomaz Canabrava wrote:
> > I'v spend all morning working on Rocs trying to implement a
> multi-document
> > panel interface,
> > almost everything is good, but this little piece of code here is somewhat
> > broken,
> > my head hurts, anybody can show some light on this, pretty please, with
> > sugar on top?
> >
> > void FileArea::createNewScript(){
> >    KTextEditor::Editor *e = _mainWindow->editor();
> >    KTextEditor::Document* d = e -> createDocument(0);
> >    d->setMode("JavaScript");
> >    addScript(d->documentName(), d);
> > }
> >
> > void FileArea::addScript(const QString& name, KTextEditor::Document*
> data){
> >    QTreeWidgetItem *scriptItem = new QTreeWidgetItem(_scriptFolder);
> >    scriptItem->setIcon(0, KIcon("file-new"));
> >    scriptItem->setText(0, name);
> >    scriptItem->setData(0, ScriptRole, data);
> >   _mainWindow->changeActive(scriptItem);
> > }
> >
> > void MainWindow::changeActiveScript(QTreeWidgetItem *item){
> >   KTextEditor::Document *d = item->data(0, FileArea::ScriptRole));
> >   _scriptingArea->setDocument( d );
> >   guiFactory()->addClient(_scriptingArea->view());
> > }
> >
> > ERROR:
> >
> > cannot convert 'QVariant' to 'KTextEditor::Document*' in initialization
> > the line   KTextEditor::Document *d = item->data(0,
> > FileArea::ScriptRole)); gives me a QVariant,
> > I'v tried to qobject_cast<KTextEditor*>(item->data(0,
> > FileArea::ScriptRole)); but also without luck.
> >
> > Anybody can give-me some light? i'm stuck here almost all morning.
>
>
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>



-- 
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