XML Data into QTableView: Some Problems: Empty Table, Messed up Header Data etc.

MeerMusik

@p3c0 appendRow puts a "hard-coded" list into the Table. But the Data, that should be put into the Table, are in the XML File. So this is not exactly what I want. Putting and getting hundreds of Names, Adresses, Links etc. into and from a QList<QStandardItem *> is just too much.
++
I have setup the Horizontal Labels now. All are in correct order. So the Horizontal Labels are fine - for now.

1 (or more?) Problem(s) still exists: After a lot of Code changes, I am sure that this Part is somehow wrong:

if(xmlReader.name() == "Stadt")
{
  modelForTableViewMainView->insertColumn(modelForTableViewMainView->columnCount());
  modelForTableViewMainView->setData(modelForTableViewMainView->index(modelForTableViewMainView->columnCount(),0), xmlReader.readElementText());
}
//And so on for the other Names in the XML Files.

As 12 additional Labels [Labeled 13 to 24] get added after "Eintragnummer (ID)" [the last Name in the XML File], when xmlReader.readElementText() has been executed. One Label per Name in the XML File. But what I want here is:

All Data found in the XML File which i.e.:

Have the Name "Stadt" should be put in Column 0, Row 0 (and ongoing).
Have the Name "Stadtteil" should be in Column 1, Row 0 (and ongoing).

As with the rest of the Database Entries.

Can it be, that I have mixed up / twisted some parts of QTableView and the Model for the QTableView?

Thanks for your patience!!

MeerMusik

Alright.

When I try:

if(xmlReader.name() == "Stadt")
{
//New Part - Start
QString lolopolo;
lolopolo = xmlReader.readElementText();
QMessageBox::information(this, "Teste Abfrage Stadt:", lolopolo);
//New Part - End

modelForTableViewMainView->insertColumn(modelForTableViewMainView->columnCount());
modelForTableViewMainView->setData(modelForTableViewMainView->index(modelForTableViewMainView->columnCount(),0), xmlReader.readElementText());
}

The QMessageBox shows the correct Element Text.
But I am stuck right now, how to put the read Element Text into the QTable.

I think, I try to play around with reading the Database File to a QStringList and put everything from there into the TableView. Not sure if this will work.

Any Hint(s) where I did a fatal Error, would be appreciated :)
Oliver

SGaist

Hi,

You are trying to access an index that doesn't exist. Indexes goes from 0 to columnCount() - 1 (same rule applies for rows)

MeerMusik

@SGaist
Ouch. I thought by using it this way, I set up a new Index. sigh
And what is the correct way? The QXmlStreamReader should be fine for this. Or not?

SGaist

It won't because you are asking an index for a column that doesn't exist. Just call the function with the correct value for column and you'll be fine. No problem with the use of QXmlStreamReader

MeerMusik

@SGaist

Oh my. My schizophrenic Brain make such easy things some times really hard. C++ is absolutely different than Delphi.
With the following code, it finally reads the first Entry in the XML File:

if(xmlReader.name() == "Stadt")
{
    QString setItemTestCity;
    setItemTestCity = xmlReader.readElementText();

    xmlReader.readElementText();
    QMessageBox::information(this, "Teste Abfrage Stadt:", setItemTestCity);
    modelForTableViewMainView->setItem(0,0, new QStandardItem(setItemTestCity));
}

Next step: Pull more than 1 "Stadt" Entry from the XML File.

Thanks :)

SGaist

You old technique, basically, was good, it was just missing the -1 to get the last available column

MeerMusik

@SGaist The problem was, I was too dumb to see where to put the "-1". :(

Now I must find a way to read not only 1 but all "Stadt" Elements.

SGaist

Follow the XBel example, it should give you what you need

MeerMusik

@SGaist Thanks for the hint. I will take a look at it - tomorrow. Good night. And thanks for being continuously helpful and patient :) I am sure I will be back.

Oliver

MeerMusik

Hello.

I decided to try my Luck for one more time without the XBEL Example. The following Code (Snippet) puts the Data from the XML File in the QTableView:

if(xmlReader.name() == "Stadt")
{
QString setItemTestStadt;
setItemTestStadt = xmlReader.readElementText();

int row = tableViewMainViewIndex.row();
int column = tableViewMainViewIndex.column();
row = 0;
column = 0;

QStandardItem *item = new QStandardItem(QString(setItemTestStadt));
modelForTableViewMainView->insertRow(xmlReader.readElementText().count());
modelForTableViewMainView->setData(modelForTableViewMainView->index(row,column,tableViewMainViewIndex), xmlReader.readElementText());
modelForTableViewMainView->setItem(row, column, item);
}

Cant believe that I have been so close for 2 weeks. //Facepalm

<s>Next "Problem" that I have: The Header Labels are correctly resized to fit their Content. But the Items Text is not. Already looked through the Web and through the Forum. Do I really have to subClass $Something?

Currently I try the following Settings:

tableViewMainView->setVisible(false);
QRect originalViewport = tableViewMainView->viewport()->geometry();
QRect newViewport = originalViewport;
newViewport.setWidth(std::numeric_limits<int>::max());
 tableViewMainView->viewport()->setGeometry(newViewport);
 tableViewMainView->resizeRowsToContents();
 tableViewMainView->resizeColumnsToContents();
 tableViewMainView->viewport()->setGeometry(originalViewport);
 tableViewMainView->horizontalHeader()->resizeSections(QHeaderView::ResizeToContents);
 tableViewMainView->verticalHeader()->resizeSections(QHeaderView::ResizeToContents);

//And after reading the Data into the TableView
tableViewMainView->setVisible(true);
```</s>
EDIT: Never  mind. I forgot that that I must call resetColumnsToContents each time I update the TableView.

Thanks again :)
Oliver

MeerMusik

Morning Folks.

A new Question:

I have different Views where the different Data from the XML File get split. 1 thing I will try is:
When

Row 0 in tableViewMainView is active / selected, then select
all Items in Row 0 in tableViewAdditionalInfo

I tried different things but no luck yet.

//Not sure which Slot to use. Or if any of those SLOTs are even correct.
connect(tableViewMainView,SIGNAL(pressed(QModelIndex)),this,SLOT(selectCurrentRowDependingOnTableViewMainView()));
//What I try right now:
tableViewMainView->setSelectionBehavior(QAbstractItemView::SelectRows);
tableViewAdditionalInfo->setSelectionBehavior(QAbstractItemView::SelectRows);

int selectedRow;
selectedRow = tableViewMainView->rowAt(tableViewMainViewIndex.row());
tableViewMainView->rowAt(tableViewMainViewIndex.row());

tableViewAdditionalInfo->selectRow(selectedRow);

Thanks

MeerMusik

And another Problem.
I want to display the Text of the XML Element "Name" in 2 different Views. But the Rows 0 + Column + of the 2nd View stay empty:

if(xmlReader.name() == "Name")
{
//Set the Name in first View:
QString setItemName;
setItemName = xmlReader.readElementText();
int row1 = tableViewMainViewIndex.row();
int column1 = tableViewMainViewIndex.column();
row1 = 0;
column1 = 3;
QStandardItem *item = new QStandardItem(QString(setItemName));
modelForTableViewMainView->insertRows(modelForTableViewMainView->rowCount(),  xmlReader.readElementText().count(), tableViewMainViewIndex);
modelForTableViewMainView->setData(modelForTableViewMainView->index(row1,column1,tableViewMainViewIndex), xmlReader.readElementText());
modelForTableViewMainView->setItem(row1, column1, item);
if(xmlReader.readElementText().isEmpty())
{
xmlReader.readNext();
}

//Set the Name in the 2nd View:
QString setItemName2;
setItemName2 = xmlReader.readElementText();
int row2 = tableViewAdditionalInfoIndex.row();
int column2 = tableViewAdditionalInfoIndex.column();
row2 = 0;
column2 = 0;
QStandardItem *item2 = new QStandardItem(QString(setItemName2));
modelForTableViewAdditionalInfo->insertRow(xmlReader.readElementText().count(), tableViewAdditionalInfoIndex);
                 modelForTableViewAdditionalInfo->setData(modelForTableViewAdditionalInfo->index(row2,column2,tableViewAdditionalInfoIndex), xmlReader.readElementText());
modelForTableViewAdditionalInfo->setItem(row2, column2, item2);
if(xmlReader.readElementText().isEmpty())
{
xmlReader.readNext();
}
}

I am not sure whats wrong. Even calling the "xmlReader.name() == "Name" at a later point , let the cells stay empty.
++++
EDIT: I finally found a workaround:

//Instead of:
QStandardItem *item2 = new QStandardItem(QString(setItemName2));
//I do:
QStandardItem *item2 = new QStandardItem(modelForTableViewMainView->item(0,3)->text());

But I still have the Problem mentioned 2 posts above: How can I select 2 Rows in different Views simultaneously?

Any hint is welcome :)

SGaist

You can use the first view selectionChanged signal and then the second view selection model to do what you want.

MeerMusik

Morning.

I connected the tableViewMainView:

connect(tableViewMainView->selectionModel(),SIGNAL(selectionChanged(QItemSelection,QItemSelection)),this,SLOT(selectCurrentRowDependingOnTableViewMainView()));

I try to scrollTo() by using the following Method:

void CDatabase::selectCurrentRowDependingOnTableViewMainView()
{
QPoint pos;
int row=tableViewMainView->rowAt(pos.y());
int column=tableViewMainView->columnAt(pos.x());
if(modelForTableViewMainView->item(row,column)->isSelectable())
{
QModelIndex selectedRow1Index=modelForTableViewMainView->index(row,column);
tableViewAdditionalInfo->scrollTo(selectedRow1Index,QAbstractItemView::EnsureVisible);
}
}

I get no Error Messages but it still does not work as intended.

SGaist

Should the items rows/cols from the second view be the same has the one from the main view ?

MeerMusik

Evening.
What I want is:

If I select any Column in Row 0 in Table 1 = select Row 0 in Table 2
If I select any Column in Row 5 in Table 1 = select Row 5 in Table 2
etc. etc.

SGaist

In that case, use the QItemSelection parameters from the selectionChanged signal to retrieve these rows you want to select