[Interest] Editable QComboBox: lineEdit->selectAll() changes currentIndex()

[André Hartmann]

Hi all,

The following happens with Qt 4.8.2 and 5.2.0 under Windows 7.

I have a QMainWindow with a QComboBox list, a QPushButton enter
and a QTextEdit log (see snippet below).

The combo box has insertPolicy = insertAtBottom and duplicatesEnabled = 
false and is empty.

Now the following happens:

1. Input "111" and press key return -> "111" appears in the log
2. Input "222" and press key return -> "222" appears in the log
3. Choose "111" again (key line up), press key return ->
    "111" appears in the log
4. "111" is still shown in the combo box, but when I press return ->
    "222" appears in the log and is also the text selected in the
    combo box.

As soon as I comment out ui->list->lineEdit()->selectAll(), everything 
is fine.

Am I doing something wrong or is this a bug?

Andre

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

#include <QLineEdit>
#include <QTimer>

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

	connect(ui->list->lineEdit(), SIGNAL(returnPressed()),
	this, SLOT(on_enter_clicked()));
}

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

void MainWindow::on_enter_clicked()
{
	ui->log->append(ui->list->currentText());

	ui->list->lineEdit()->selectAll();
	ui->list->setFocus();
}