QSortFilterProxyModel -filterAcceptsRow()- filter parent Node and child Node

[xcround]

Hi I'm having a similar problem, where I can only select the parent nodes.
I have the following:
@
bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent)
{
....
if (!action.isEmpty())
{
QModelIndex index = sourceModel()->index(sourceRow,
ACTION, sourceParent);

    for (int i = 0; i < sourceModel()->rowCount(sourceParent); i++)
    {
        QModelIndex tmpIndex = sourceModel()->index(i,0,sourceParent);
        if (tmpIndex.isValid())
            hasAcceptedChildren(tmpIndex.row(), tmpIndex);
    }

    if (action != sourceModel()->data(index).toString())
        return false;
}

....
}
@

Isn't this suppose to be it?
Thanks.

[ManasQt]

Hi xcround,

     I am not clear , are you trying to filter parent as well as child?  

I have accomplished this and here is the logic,

@def filterAcceptsRow(self,sourceRow,sourceParent):
if super(MySortFilterProxyModel,self).filterAcceptsRow(sourceRow,sourceParent):
return True
return self.hasAcceptedChildren(sourceRow,sourceParent)

def hasAcceptedChildren(self,sourceRow,sourceParent):
model=self.sourceModel()
sourceIndex=model.index(sourceRow,0,sourceParent)
if not sourceIndex.isValid():
return False
indexes=model.rowCount(sourceIndex)
for i in range(indexes):
if self.filterAcceptsRow(i,sourceIndex):
return True
return False

@

[xcround]

Yes, I would like to filter both parent and child.
Also I forgot to mention, I have a return true in the end of the function.
Thanks

[xcround]

Here is the what I have now, but still is not filtering the parents and child.
@
bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent)
{
....
if (!action.isEmpty())
{

    QModelIndex index = sourceModel()->index(sourceRow,
                                             ACTION, sourceParent);

    if (hasAcceptedChildren(sourceRow, sourceParent))
        return true;

    if (action != sourceModel()->data(index).toString())
        return false;
}
return true;

}
bool TableProxy::filterAcceptsRowItself(int sourceRow, const QModelIndex &sourceParent) const
{
return QSortFilterProxyModel::filterAcceptsRow(sourceRow, sourceParent);
}

bool TableProxy::hasAcceptedChildren(int source_row, const QModelIndex &source_parent) const
{
QModelIndex item = source_parent;
if (!item.isValid())
{
qDebug() << "item invalid" << source_parent.data().toString() << source_row;
return false;
}
int childCount = item.model()->rowCount(item);

if (childCount == 0)
    return false;

for (int i = 0; i < childCount; ++i)
{
    if (filterAcceptsRowItself(i, item))
        return true;
    //recursive call
    if (hasAcceptedChildren(i, item))
        return true;
}

return false;

}
@
Thanks for the help

[ManasQt]

Hi xcround,
please make changes in your code according this python code and i am sure it will filter parent as well as child .
@
def filterAcceptsRow(self,sourceRow,sourceParent):
if super(MySortFilterProxyModel,self).filterAcceptsRow(sourceRow,sourceParent):
return True
return self.hasAcceptedChildren(sourceRow,sourceParent)

def hasAcceptedChildren(self,sourceRow,sourceParent):
model=self.sourceModel()
sourceIndex=model.index(sourceRow,0,sourceParent)
if not sourceIndex.isValid():
return False
indexes=model.rowCount(sourceIndex)
for i in range(indexes):
if self.filterAcceptsRow(i,sourceIndex):
return True
return False@

[ManasQt]

Hi xcround,
I think in your case it would be some thing like this needs to be......
( i am not a c/c++ guy)
@
bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent)
{
....
if (!action.isEmpty())
{
if (QSortFilterProxyModel::filterAcceptsRow(sourceRow, sourceParent))
{
return true
}
return hasAcceptedChildren(sourceRow, sourceParent)
}
.........
}

bool TableProxy::hasAcceptedChildren(int source_row, const QModelIndex &source_parent) const
{
QModelIndex item = source_parent;
if (!item.isValid())
{
qDebug() << "item invalid" << source_parent.data().toString() << source_row;
return false;
}
int childCount = item.model()->rowCount(item);

if (childCount == 0)
    return false;

for (int i = 0; i < childCount; ++i)
{
    if (filterAcceptsRow(i, item))
        return true;
}

return false;

}@

[xcround]

Sorry but from mine understanding I first need to check if the string matches the one I'm looking for.
So that's why I have the first if statement, and then I do what you said in the previous post.
@
f (!action.isEmpty())
{
QModelIndex index = sourceModel()->index(sourceRow,
ACTION, sourceParent);

        if (action != sourceModel()->data(index).toString())
            return false;

        if ((QSortFilterProxyModel::filterAcceptsRow(sourceRow, sourceParent)))
            return true;

        return hasAcceptedChildren(sourceRow, sourceParent);
    }

@
Still trying to understand whats going wrong.

[burgerking]

Hi qties,

at the first time I read the post from André I was so happy to find the solution I am searching for.
But unfortunately I am to stupid to get it work. Maybe you can help me.

If I use the standard QSortFilterProxyModel everything works good except the search at textChanged Signal.
But if I use the LeafFilterProxyModel (exactly as André has post it) an error occurs and I do not know what it means.

I hope somebady can help me.
Thank you.

@
LeafFilterProxyModel m_oProxyModel;
//QSortFilterProxyModel m_oProxyModel;
QStandardItemModel m_oItemModel; // manualy filled

m_oProxyModel.setSourceModel(&m_oItemModel);
m_tvDBC->setModel(&m_oProxyModel); // TreeView
m_lvDBC->setModel(&m_oStringModel); // ListView
@

@
void cClass::textChanged(QString text)
{
QRegExp::PatternSyntax pSyntax = QRegExp::PatternSyntax(QRegExp::FixedString);
QRegExp regExp(text, Qt::CaseInsensitive, pSyntax);

m_oProxyModel.setFilterRegExp(regExp);
m_oProxyModel.setFilterKeyColumn(-1);
}
@

@
Error 1 error LNK2001: unresolved external symbol "public: __thiscall
LeafFilterProxyModel::LeafFilterProxyModel(class QObject *)"
??0LeafFilterProxyModel@@QAE@PAVQObject@@@Z) myobject.obj
@

[andre]

Sounds like you forgot to add the .h file to your HEADERS section in your .pro file, and the .cpp file to the SOURCES section?

[Ruzik]

What does _parent type in this string?
@bool filterAcceptsRow(int source_row, const QModelIndex &source;_parent) const;@
And wath does this argument do?
And second question:
source_parent is source->parent()?
And in advance sorry for stupid questions)

[andre]

There was an unfortunate bug at the time in DevNet, that sometimes inserted ; at the wrong places in code sections. The code listing I posted suffered from this. The argument is supposed to be a single argument source_parent. I'll try to fixup the original posting. Thanks for noticing.

[Ruzik]

It is clear.
One more thank you for your help!

[frankiefrank]

Thank you - this thread has been really helpful!

[bycross028]

Esta implementación recorre todo los sub-Nodos del padre buscando que el filterRegExp coincida con el Qt::DisplayRole del sub-Nodo.

El algoritmo no utiliza recursividad :D

@bool SortFilterProxyModel::filterAcceptsRow(int source_row, const QModelIndex &source_parent) const
{
QList<QModelIndex> children;
children << sourceModel()->index(source_row, 0, source_parent);

bool show = false;
for(int i = 0; i < children.length(); i++)
{
    if(show) break;

    // Add sub Nodos
    //
    for(int c = 0; c < sourceModel()->rowCount(children[i]) ;c++)
        children.append(children[i].child(c,0));

    QString type = sourceModel()->data(children[i], Qt::DisplayRole).toString();
    show = type.contains(filterRegExp());        
}
return show;

}@

[andre]

Could you keep posts to English in this forum please? There are specialized sub-forums for other languages.

[andre]

Could you keep posts to English in this forum please? There are specialized sub-forums for other languages.