Solved TableView with exapanding columns

[noone]

Hi, How can I have TableView with its columns expanding to available space ? if table have 2 columns then those 2 columns should expand to fill avaible width. here is my code:-

import QtQuick 2.15
import QtQuick.Layouts 1.15
import QtQuick.Controls 2.15 as QQC2
import org.kde.kirigami 2.4 as Kirigami


Kirigami.Page {
    id: examsRoot
    title: "Exams"
    //some kde specific stuff 
    actions {
        contextualActions: [
            Kirigami.Action {
                text: "Create Exam"
                iconName: "add"
                tooltip: { text : "Create New Exam" }
            }
        ]
    }

    TableView {
        model: ExamsModel
        anchors.fill: parent
        delegate: QQC2.Frame {
            width: examsRoot.width/3 // I have 3 columns so width should be divided equally to all columns, no?
            QQC2.Label {
                text: display
                anchors.centerIn: parent
            }
        }

    }
}

#pragma once

#include <QAbstractTableModel>
#include <QString>
#include <map>

namespace Models {

class Exams : public QAbstractTableModel {

private:
    struct DS {
        QString title;
        unsigned int marks;
        int state;
        std::vector<int>* questions = nullptr;
    };

    //id and exams
    std::map<int, DS> exams;

public:
    Exams();

    // QAbstractItemModel interface
    int rowCount(const QModelIndex& parent) const override;
    int columnCount(const QModelIndex& parent) const override;
    QVariant data(const QModelIndex& index, int role) const override;

    // QAbstractItemModel interface
public:
    QHash<int, QByteArray> roleNames() const override;
};

} //end namespace Models

#include "exams.hpp"

namespace Models {

Exams::Exams()
{
    for (int i = 0; i < 200; i++) { // fill random for now
        DS exam {
            "Exam" + QString::number(i),
            0,
            (i * 3) / 2,
            nullptr
        };

        exams[i] = exam;
    }
}

int Exams::rowCount(const QModelIndex& parent) const
{
    return exams.size();
}

int Exams::columnCount(const QModelIndex& parent) const
{
    return 3;
}

QVariant Exams::data(const QModelIndex& index, int role) const
{
    if (role == Qt::DisplayRole) {
        if (index.column() == 0)
            return exams.at(index.row()).title;
        else if (index.column() == 1)
            return exams.at(index.row()).marks;
        else if (index.column() == 2)
            return exams.at(index.row()).state;
    }
    return QVariant();
}

QHash<int, QByteArray> Exams::roleNames() const
{
    return { { Qt::DisplayRole, "display" } };
}

} // end namepsace Models

Models::Exams exams;
qmlAppEngine.rootContext()->setContextProperty("ExamsModel", &exams);

This gives following result:-

And when I try to resize the window, everything gets messed up

EDIT:-

I also tried using

columnWidthProvider: function (_) { return examsRoot.width/3

But it gives somewhat same messed up output as 2nd screenshot.

[noone]

adding onWidthChanged: forceLayout() with columnWidthProvider to TableView works

[fcarney]

Take a look at columnWithProvider. It should help you determine the width of your columns better.

[noone]

@fcarney pls take a look at last screenshot in my first post. using columnWidthProvider messes up first two columns

[fcarney]

You need to return a list of column widths. Sorry I didn't see that before.

[noone]

adding onWidthChanged: forceLayout() with columnWidthProvider to TableView works