Qt-interest Archive, July 2007
AbstractTableModel subclass
Message 1 in thread
Hello i create my TableModel extending QAbstractTableModel
I observer a extrange behavior my view allways display a empty row at the end.
I other words when my rowCount returns 1 I view 2 rows in screen one
with the data in the model a one empty. Any ideas on how avoid this
empty row.
thanks in advance
--
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Message 2 in thread
> Hello i create my TableModel extending QAbstractTableModel
>
> I observer a extrange behavior my view allways display a empty row at the
> end.
>
> I other words when my rowCount returns 1 I view 2 rows in screen one
> with the data in the model a one empty. Any ideas on how avoid this
> empty row.
>
>
You will have to post a minimal compilable example of this issue. Once we
have that I'm sure we will see an error in your code.
Cheers!
--Justin
--
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Message 3 in thread
On Jul 26, 2007, at 8:13 PM, pepone.onrez wrote:
> Hello i create my TableModel extending QAbstractTableModel
>
> I observer a extrange behavior my view allways display a empty row
> at the end.
>
> I other words when my rowCount returns 1 I view 2 rows in screen one
> with the data in the model a one empty. Any ideas on how avoid this
> empty row.
>
> thanks in advance
Try using http://labs.trolltech.com/page/Projects/Itemview/Modeltest
It's a ModelTest and it helps to catch most of common errors in
models. When you get some assertion go to line it points, and in
comments it will tell you how to fix it.
--
[ signature omitted ]
Message 4 in thread
I try modeltest and it not report any errors in my code.
Here is the code in my tableModel
QVariant Oz::Ui::TableModel::headerData(int section,Qt::Orientation
orientation,int role)const{
if(_manager != 0 && role < _manager->headerData().size()){
if(orientation == Qt::Horizontal)
return _manager->headerData()[role];
else
return section;
}
return QVariant();
}
QVariant Oz::Ui::TableModel::data(const QModelIndex &index, int role) const{
if (!index.isValid()){
return QVariant();
}if (role == Qt::DecorationRole){
Oz::Ui::ModelMap::const_iterator it;
it = _items.find(index.row());
if(it != _items.end())
return (*it).second->oz_icon();
return QIcon(":/images/default_incon.png");
}else if (role == Qt::DisplayRole){
QString value = "";
Oz::Ui::ModelMap::const_iterator it;
it = _items.find(index.row());
if(it != _items.end())
value = (*it).second->oz_value(index.column());
return value;
}
return QVariant();
}
Qt::ItemFlags Oz::Ui::TableModel::flags(const QModelIndex& index) const{
if (index.isValid()){
return (Qt::ItemIsEnabled | Qt::ItemIsSelectable);
}
return Qt::ItemIsEnabled;
}
int Oz::Ui::TableModel::rowCount(const QModelIndex& parent) const{
if(parent.isValid())
return 0;
return _items.size();
}
int Oz::Ui::TableModel::columnCount(const QModelIndex& parent) const{
if (parent.isValid())
return 0;
if(_manager)
return _manager->headerData().size();
return 0;
}
//Code end
Thanks in advance
On 7/27/07, Kamil Klimek <naresh@xxxxxxx> wrote:
>
> On Jul 26, 2007, at 8:13 PM, pepone.onrez wrote:
>
> > Hello i create my TableModel extending QAbstractTableModel
> >
> > I observer a extrange behavior my view allways display a empty row
> > at the end.
> >
> > I other words when my rowCount returns 1 I view 2 rows in screen one
> > with the data in the model a one empty. Any ideas on how avoid this
> > empty row.
> >
> > thanks in advance
>
> Try using http://labs.trolltech.com/page/Projects/Itemview/Modeltest
>
> It's a ModelTest and it helps to catch most of common errors in
> models. When you get some assertion go to line it points, and in
> comments it will tell you how to fix it.
>
> --
> To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx with "unsubscribe" in the subject or the body.
> List archive and information: http://lists.trolltech.com/qt-interest/
>
>
--
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Message 5 in thread
On fredag den 27. Juli 2007, pepone.onrez wrote:
> I try modeltest and it not report any errors in my code.
>
> Here is the code in my tableModel
>
> QVariant Oz::Ui::TableModel::headerData(int section,Qt::Orientation
> orientation,int role)const{
> if(_manager != 0 && role < _manager->headerData().size()){
> if(orientation == Qt::Horizontal)
> return _manager->headerData()[role];
> else
> return section;
You need to use "return _manager->headerData()[section]" and only when role is
Qt::DisplayRole. Look at the Qt documentation for the role values.
> }
> return QVariant();
> }
>
> QVariant Oz::Ui::TableModel::data(const QModelIndex &index, int role)
> const{ if (!index.isValid()){
> return QVariant();
> }if (role == Qt::DecorationRole){
> Oz::Ui::ModelMap::const_iterator it;
> it = _items.find(index.row());
> if(it != _items.end())
> return (*it).second->oz_icon();
> return QIcon(":/images/default_incon.png");
> }else if (role == Qt::DisplayRole){
> QString value = "";
> Oz::Ui::ModelMap::const_iterator it;
> it = _items.find(index.row());
> if(it != _items.end())
> value = (*it).second->oz_value(index.column());
> return value;
> }
> return QVariant();
> }
>
>
> Qt::ItemFlags Oz::Ui::TableModel::flags(const QModelIndex& index) const{
> if (index.isValid()){
> return (Qt::ItemIsEnabled | Qt::ItemIsSelectable);
> }
> return Qt::ItemIsEnabled;
> }
index.isValid() only checks if the row or column number is < 0. You have to
check yourself if it is withint the row and column count of your model. Also,
you might want to use BaseClass::flags(index) instead of just
Qt::ItemIsEnabled.
> int Oz::Ui::TableModel::rowCount(const QModelIndex& parent) const{
> if(parent.isValid())
> return 0;
> return _items.size();
> }
>
> int Oz::Ui::TableModel::columnCount(const QModelIndex& parent) const{
> if (parent.isValid())
> return 0;
> if(_manager)
> return _manager->headerData().size();
> return 0;
> }
When you do this, be sure to call reset() if you set _manager after the model
is instantiated.
I hope this helps.
Bo.
> //Code end
>
> Thanks in advance
>
> On 7/27/07, Kamil Klimek <naresh@xxxxxxx> wrote:
> > On Jul 26, 2007, at 8:13 PM, pepone.onrez wrote:
> > > Hello i create my TableModel extending QAbstractTableModel
> > >
> > > I observer a extrange behavior my view allways display a empty row
> > > at the end.
> > >
> > > I other words when my rowCount returns 1 I view 2 rows in screen one
> > > with the data in the model a one empty. Any ideas on how avoid this
> > > empty row.
> > >
> > > thanks in advance
> >
> > Try using http://labs.trolltech.com/page/Projects/Itemview/Modeltest
> >
> > It's a ModelTest and it helps to catch most of common errors in
> > models. When you get some assertion go to line it points, and in
> > comments it will tell you how to fix it.
> >
> > --
> > To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx with
> > "unsubscribe" in the subject or the body. List archive and information:
> > http://lists.trolltech.com/qt-interest/
--
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Message 6 in thread
Hi thanks for all the tips
The problem was that i made an incorrect call to beginInsertRows i
change _itemes.size() for _items.size() - 1 and now all is working.
void Oz::Ui::TableModel::setItems(const Oz::Ui::ModelMap& items){
if(_items.size() > 0 ){
beginRemoveRows(QModelIndex(),0,_items.size() );
_items.clear();
endRemoveRows();
}
beginInsertRows(QModelIndex(),0,items.size() );
_items = items;
endInsertRows();
}
On 7/27/07, Bo Thorsen <bo@xxxxxxxxxxxxxxxxxxxxx> wrote:
> On fredag den 27. Juli 2007, pepone.onrez wrote:
> > I try modeltest and it not report any errors in my code.
> >
> > Here is the code in my tableModel
> >
> > QVariant Oz::Ui::TableModel::headerData(int section,Qt::Orientation
> > orientation,int role)const{
> > if(_manager != 0 && role < _manager->headerData().size()){
> > if(orientation == Qt::Horizontal)
> > return _manager->headerData()[role];
> > else
> > return section;
>
> You need to use "return _manager->headerData()[section]" and only when role is
> Qt::DisplayRole. Look at the Qt documentation for the role values.
>
> > }
> > return QVariant();
> > }
> >
> > QVariant Oz::Ui::TableModel::data(const QModelIndex &index, int role)
> > const{ if (!index.isValid()){
> > return QVariant();
> > }if (role == Qt::DecorationRole){
> > Oz::Ui::ModelMap::const_iterator it;
> > it = _items.find(index.row());
> > if(it != _items.end())
> > return (*it).second->oz_icon();
> > return QIcon(":/images/default_incon.png");
> > }else if (role == Qt::DisplayRole){
> > QString value = "";
> > Oz::Ui::ModelMap::const_iterator it;
> > it = _items.find(index.row());
> > if(it != _items.end())
> > value = (*it).second->oz_value(index.column());
> > return value;
> > }
> > return QVariant();
> > }
> >
> >
> > Qt::ItemFlags Oz::Ui::TableModel::flags(const QModelIndex& index) const{
> > if (index.isValid()){
> > return (Qt::ItemIsEnabled | Qt::ItemIsSelectable);
> > }
> > return Qt::ItemIsEnabled;
> > }
>
> index.isValid() only checks if the row or column number is < 0. You have to
> check yourself if it is withint the row and column count of your model. Also,
> you might want to use BaseClass::flags(index) instead of just
> Qt::ItemIsEnabled.
>
> > int Oz::Ui::TableModel::rowCount(const QModelIndex& parent) const{
> > if(parent.isValid())
> > return 0;
> > return _items.size();
> > }
> >
> > int Oz::Ui::TableModel::columnCount(const QModelIndex& parent) const{
> > if (parent.isValid())
> > return 0;
> > if(_manager)
> > return _manager->headerData().size();
> > return 0;
> > }
>
> When you do this, be sure to call reset() if you set _manager after the model
> is instantiated.
>
> I hope this helps.
>
> Bo.
>
> > //Code end
> >
> > Thanks in advance
> >
> > On 7/27/07, Kamil Klimek <naresh@xxxxxxx> wrote:
> > > On Jul 26, 2007, at 8:13 PM, pepone.onrez wrote:
> > > > Hello i create my TableModel extending QAbstractTableModel
> > > >
> > > > I observer a extrange behavior my view allways display a empty row
> > > > at the end.
> > > >
> > > > I other words when my rowCount returns 1 I view 2 rows in screen one
> > > > with the data in the model a one empty. Any ideas on how avoid this
> > > > empty row.
> > > >
> > > > thanks in advance
> > >
> > > Try using http://labs.trolltech.com/page/Projects/Itemview/Modeltest
> > >
> > > It's a ModelTest and it helps to catch most of common errors in
> > > models. When you get some assertion go to line it points, and in
> > > comments it will tell you how to fix it.
> > >
> > > --
> > > To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx with
> > > "unsubscribe" in the subject or the body. List archive and information:
> > > http://lists.trolltech.com/qt-interest/
>
>
>
> --
>
> Thorsen Consulting ApS - Qt consulting services
> http://www.thorsen-consulting.dk
>
> --
> To unsubscribe - send a mail to qt-interest-request@xxxxxxxxxxxxx with "unsubscribe" in the subject or the body.
> List archive and information: http://lists.trolltech.com/qt-interest/
>
>
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