Changing a QTableWidget rows based on the changes made to another QTableWidget rows

Kushan

In my Qt c++ application I have 2 single column table widgets! Each table widget has 10 rows and one table widget has userIDs from 0 to 9 and the other table widget has corresponding user names for each userID.

following is my code

MainWindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>

namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    QStringList Headers1;
    QStringList Headers2;

    QStringList t1List1;

    QStringList t2List1;


    QStringList t1List1amend;


    QStringList t2List1amend;
    QStringList t2List2amend;

    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

private slots:
    void on_pushButton_3_clicked();

    void on_pushButton_4_clicked();
    void getChangedIndices();




    void on_pushButton_5_clicked();

private:
    Ui::MainWindow *ui;
};

MainWindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);

    ui->tableWidget->setRowCount(10);
    ui->tableWidget->setColumnCount(1);

    ui->tableWidget_2->setRowCount(10);
    ui->tableWidget_2->setColumnCount(1);

    ui->tableWidget->setColumnWidth(0,150);
    ui->tableWidget_2->setColumnWidth(0,150);


    Headers1<<"UserID";
    Headers2<<"UserName";
    ui->tableWidget->setHorizontalHeaderLabels(Headers1);
    ui->tableWidget_2->setHorizontalHeaderLabels(Headers2);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::on_pushButton_3_clicked()
{
    t1List1<<"0"<<"1"<<"2"<<"3"<<"4"<<"5"<<"6"<<"7"<<"8"<<"9";
    t2List1<<"John"<<"Smith"<<"Anne"<<"Kamal"<<"Yohan"<<"Aruna"<<"Yusuf"<<"ABC"<<"Shamal"<<"Lasith";

    for(int i=0;i<t1List1.size();i++){
        ui->tableWidget->setItem(i,0,new QTableWidgetItem(t1List1[i]));
    }


    for(int i=0;i<t2List1.size();i++){
        ui->tableWidget_2->setItem(i,0,new QTableWidgetItem(t2List1[i]));
    }

}

void MainWindow::on_pushButton_4_clicked()
{
    for(int i=0;i<t1List1.size();i++){
        t1List1amend<<ui->tableWidget->item(i,0)->text();
    }


}


void MainWindow::getChangedIndices(){
    for(int i=0;i<t1List1amend.size();i++){
        if(t1List1amend[i]!=t1List1[i]){


            t2List1.replace(i,t2List1[t1List1amend[i].toInt()]);
            t2List1amend<<t2List1[i];

        }
        else{
            t2List1amend<<t2List1[i];
        }
    }

}
void MainWindow::on_pushButton_5_clicked()
{
   getChangedIndices();
}

when push button 3 is clicked the two table widgets are displayed with userIDs and USernames. After changing the user IDs( eg- USerID 1 replaced with 4 and userID 4 replaced with one) push button 4 is clicked so that a QStringList with changed userIDs are created.

the getChangedIDs is used to rearrange the userNames so that the change of userIDs are depicted.(eg- previously I changed user ID 1 to 4 and userID 4 to 1).

so after clicking push button 5 userName corresponding to userID 1("Smith") should be replaced by "Yohan" and Yohan should be replaced by "Smith". currently Smith is replaced by Yohan but Yohan does not change!( 2 Yohan's are there in the final tablewidget without any smith)

How can I correct my code?

SGaist

Hi,

Are these data coming from a database ?

VRonin

You are way over complicating this.

Use a single model and 2 QTableViews instead of 2 QTableWidgets.
in MainWindow.h, after private: add QAbstractItemModel* model;

in MainWindow.cpp

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
ui->setupUi(this);
model = new QStandardItemModel(this);
const QString userNames[] = {QStringLiteral("John"),QStringLiteral("Smith"),QStringLiteral("Anne"),QStringLiteral("Kamal"),QStringLiteral("Yohan"),QStringLiteral("Aruna"),QStringLiteral("Yusuf"),QStringLiteral("ABC"),QStringLiteral("Shamal"),QStringLiteral("Lasith")} ;
const int usernameSize = std::extent<decltype(userNames)>::value; // this should be 10
model->insertColumns(0,2);
model->insertRows(0,usernameSize );
model->setHeaderData(0,Qt::Horizontal,QStringLiteral("UserID"));
model->setHeaderData(1,Qt::Horizontal,QStringLiteral("UserName"));
for(int i=0;i<usernameSize ;++i){
model->setData(model->index(i,0),i);
model->setData(model->index(i,1),userNames[i]);
}
ui->tableView->setModel(model);
ui->tableView->setColumnHidden(1,true);
ui->tableView_2->setModel(model);
ui->tableView_2->setColumnHidden(0,true);
}
void MainWindow::on_pushButton_5_clicked()
{
   model->sort(0);
}

Kushan

@SGaist yes of course

VRonin

Then even easier to use 1 QSqlQueryModel or QSqlTableModel