Data not visible when loaded through QSortFilterProxyModel

chilarai

I am trying to display values in my Listview which are added in 2 ways

Directly values are inserted from the model constructor
On click of a button from the view

The data is fetched to the view using a QSortFilterProxyModel.

I am unable to figure out why only data loaded from the model constructor are displayed and not from the 2nd one? However, if I connect the model directly, everything works. Please point me what am I doing wrong

Model file

#include "qttest2.h"

QtTest2::QtTest2(QObject *parent) :QObject(parent), counter(0)
{
   // on the constructor it works
    addFilterList(new FilterList(0,"categorical 1", this));
    addFilterList(new FilterList(1,"categorical 2", this));
}

// With this the filter doenst work
void QtTest2::newFilter(QString section )
{
    addFilterList(new FilterList(counter, section, this));
    counter++;
}


int QtTest2::rowCount(const QModelIndex &parent) const
{
    Q_UNUSED(parent)
    return mFilter.size();
}

QVariant QtTest2::data(const QModelIndex &index, int role) const
{
    if (index.row() < 0 || index.row() >= mFilter.count())
        return QVariant();
    FilterList * filterList = mFilter[index.row()];

    if( role == FilterListIdRole)
        return filterList->filterId();
    if( role == FilterListSectionRole)
        return filterList->section();
    
    return QVariant();
}

bool QtTest2::setData(const QModelIndex &index, const QVariant &value, int role)
{
    FilterList * filterList = mFilter[index.row()];
    bool somethingChanged = false;

    switch (role) {
    case FilterListIdRole:
    {
        if( filterList->filterId()!= value.toInt()){
            filterList->setFilterId(value.toInt());
            somethingChanged = true;
        }
        break;
    }


    case FilterListSectionRole:
    {
        if( filterList->section()!= value.toString()){
            filterList->setSection(value.toString());
            somethingChanged = true;
        }
        break;
    }

    }

    if( somethingChanged){
        emit dataChanged(index,index,QVector<int>() << role);
        return true;
    }
    return false;
}

Qt::ItemFlags QtTest2::flags(const QModelIndex &index) const
{
    if (!index.isValid())
        return Qt::NoItemFlags;

    return Qt::ItemIsEditable;
}

QHash<int, QByteArray> QtTest2::roleNames() const
{
    QHash<int, QByteArray> roles;
    roles[FilterListIdRole] = "filterId";
    roles[FilterListSectionRole] = "section";
    

    return roles;
}

Display.qml

import QtQuick 2.15
import QtQuick.Controls 2.15
import QtQuick.Layouts 1.3

Page {

    id : somepageid

    Button{
        id: button1
        height: 30
        width : parent.width
        Text {
            id: btn_xt
            text: qsTr("Click to add filter")
        }
        onClicked: {
            // This doesnt come in QSortProxyModel
            QtTest2.newFilter("New section");
        }

    }

    ListView{
        id: lv2
        anchors.top: lv1.bottom
        model: MyProxyFilter
        height: parent.height - button1.height
        delegate: Row{
            Text{
                text: filterId + "-" + section
            }
        }
    }

}

MyProxyFilter.cpp

#include "myproxyfilter.h"

MyProxyFilter::MyProxyFilter(QObject *parent) : QSortFilterProxyModel(parent)
{
    setSourceModel(&m_qtTest2);
    setFilterRole(m_filterListModel.FilterListSectionRole);

}

// Haven't implemented this yet. 
void MyProxyFilter::setSearchString(QString string)
{

    this->setFilterCaseSensitivity(Qt::CaseInsensitive);
    this->setFilterFixedString(string);
}

SGaist

Hi,

Your proxy has a member variable that you set as source model. This looks wrong as already suggested in your other thread.