QLineEdit display cursos location and move forward and backward

ekato993

I have created a line edit in the mainwindow ui, and there are push buttons as well, which are modify the text of the line edit. Each time I pressed the button I add the push button text to the vector and the cursor moves forward.

I would like to make a cursor which could move move back and forth if I pressed the appropriate button and if the cursor is in the middle of the line edit text add the text to the proper vector position.

I have completely no idea how to do it?

ui->lineEdit->setReadOnly(true);

connect(ui->pushButton_50, &QPushButton::clicked, this, &MainWindow::modLineEdit);
connect(ui->pushButton_1, &QPushButton::clicked, this, &MainWindow::modLineEdit);
connect(ui->pushButton_wer, &QPushButton::clicked, this, &MainWindow::modLineEdit);

connect(ui->pushButton_forward, &QPushButton::clicked, this, &MainWindow::forward);
connect(ui->pushButton_backward, &QPushButton::clicked, this, &MainWindow::backward);

pushButton_50 means that the push button text = 50
pushButton_1 means that the push button text = 1
pushButton_wer means that the push button text = wer

QVector<QString> pressButtons;

void MainWindow::modLineEdit() {

    QString LEstr = ui->lineEdit->text();

    QPushButton* button = (QPushButton*)sender();
    QString buttonText = button->text();

    pressButtons.push_back(buttonText);

    LEstr += buttonText;
    ui->lineEdit->setText(LEstr);

}

void MainWindow::forward() {

}

void MainWindow::backward() {

}

jsulm

@ekato993 said in QLineEdit display cursos location and move forward and backward:

cursor is do NOT appear on the screen

Probably because you set the line edit read-only

jsulm

@ekato993

void MainWindow::forward()
{
    if (currentIndex < pressButtons.size() - 1) {
        QString nextString = pressButtons[++currentIndex];
        ui->lineEdit->setText(nextString);
    }
}

ekato993

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


    ui->lineEdit->setReadOnly(true);

   ui->lineEdit->setCursorPosition(0);

    qDebug()  << ui->lineEdit->cursorPosition();

    connect(ui->pushButton_50, &QPushButton::clicked, this, &MainWindow::modLineEdit);
    connect(ui->pushButton_1, &QPushButton::clicked, this, &MainWindow::modLineEdit);
    connect(ui->pushButton_wer, &QPushButton::clicked, this, &MainWindow::modLineEdit);

    connect(ui->pushButton_forward, &QPushButton::clicked, this, &MainWindow::forward);
    connect(ui->pushButton_backward, &QPushButton::clicked, this, &MainWindow::backward);

}

ui->lineEdit->setCursorPosition(0); does not set the cursor. This is my first problem.

jsulm

@ekato993

void MainWindow::forward()
{
    if (currentIndex < pressButtons.size() - 1) {
        QString nextString = pressButtons[++currentIndex];
        ui->lineEdit->setText(nextString);
        ui->lineEdit->setCursorPosition(nextString.length() / 2); // You want to set cursor in the middle, right?
    }
}

"ui->lineEdit->setCursorPosition(0); does not set the cursor. This is my first problem." - what do you mean? Does the lineEdit already have a text when you call setCursorPosition in the constructor?

ekato993

@jsulm

I think you do not understand me, the cursor does NOT appear on the screen

jsulm

@ekato993 said in QLineEdit display cursos location and move forward and backward:

cursor is do NOT appear on the screen

Probably because you set the line edit read-only

ekato993

@jsulm

Oh okey, thanks.