Signal emit Issue - Listview is not showing full list - c++

Question

I am binding a ListView with values passed from the cpp.
Issue: Listview displays only one row, mean first value, The rest of the rows are not appeared.
Checked:
I created an ListModel/ListElement in main.qml as test and bind with ListView, Now the Listview just working fine, display all values
I suspect after the signal emit, the error occurs.
Code snippet:
main.qml
ListView {
id: idListView
anchors {
left: parent.left
leftMargin: 10 * scaleFactor
right: parent.right
rightMargin: 10 * scaleFactor
top: rectangleToolBar.bottom
topMargin: 10 * scaleFactor
bottom: rectangleStatusBar.top
bottomMargin: 10 * scaleFactor
}
// model: objHomeController.detailsModel // Display only one row
//model: idListmodel //Working fine
delegate: comsearchDelegate
spacing: 10 * scaleFactor
clip: true
highlight: Rectangle {
color: 'grey'
Text {
anchors.centerIn: parent
color: 'white'
}
}
focus: true
}
Component {
id: comsearchDelegate
Row {
spacing: 10 * scaleFactor
Column {
Layout.alignment: Qt.AlignTop
Text { text: title; font { pixelSize: 14 * scaleFactor; bold: true } }
Text { text: description; font { pixelSize: 14 * scaleFactor; bold: true } }
}
}
}
ListModel {
id: idListModel
ListElement{
title : "sdfsdf";
description:"sdfsdfs";
}
ListElement {
title : "sdfsdf";
description:"sdfsdfs";
}
ListElement {
title : "sdfsdf";
description:"sdfsdfs";
}
ListElement {
title : "sdfsdf";
description:"sdfsdfs";
}
}
HomeController.h
Q_PROPERTY(Model* detailsModel READ get_detailsModel WRITE set_detailsModel NOTIFY detailsModelChanged )
HomeController.cpp
void HomeController::set_detailsModel(Model* value)
{
m_detailsModel = value;
//value has correct values - checked.
emit detailsModelChanged(value);
}
Model* HomeController::get_detailsModel(void)
{
return m_detailsModel;
}
void HomeController::getAllData()
{
m_detailsModel->clear();
m_detailsModel->updateModel(eveReadXML());
set_detailsModel(m_detailsModel);
}
Model.cpp
void Model::updateModel(const QList<Details> & details)
{
if(this->rowCount() > 0) {
this->clear();
}
beginInsertRows(QModelIndex(),rowCount(),rowCount());
m_modelData.append(details);
endInsertRows();
}
Since I came from .Net background, I would like to understand binding a Listview/GridView to a DataTable or an XML. Here I followed, Created class called Details [Details.h] and created Model.h/Model.cpp and fetching the value from there and binding to ListView. Am I doing right, Or do we have other flow. Any tutorial/Codesnippet/Link for projects highly appreciated.

Answer 1

To define ListModel from c++, you need to subclass QAbstractListModel
https://doc.qt.io/qt-5/qabstractlistmodel.html
You can take example on QQmlObjectListModel in this project : http://gitlab.unique-conception.org/qt-qml-tricks/qt-qml-models
Or clone it and use it in your project as follow :
Q_PROPERTY(QQmlObjectListModel<Details>* detailsModel READ get_detailsModel WRITE set_detailsModel NOTIFY detailsModelChanged)