Flickering mouse pointer

[guiQt]

An extremely simple text editor accepts external file drop changing its title:

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    setAcceptDrops(true);
}
 
void MainWindow::dragEnterEvent(QDragEnterEvent *event)
{
    event->accept();
}
 
void MainWindow::dragMoveEvent(QDragMoveEvent *event)
{
    event->accept();
}
 
void MainWindow::dropEvent(QDropEvent *event)
{
    if (event->mimeData()->hasFormat("text/uri-list")) {
        QList<QUrl> urls = event->mimeData()->urls();
        if (urls.isEmpty())
            return;
        QString fileName = urls.first().toLocalFile();
        if (fileName.isEmpty())
            return;
        setWindowTitle(tr("%1 - %2").arg(fileName).arg(tr("Drag File")));
    }
}

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

void MainWindow::dragEnterEvent(QDragEnterEvent *event)
{
    event->accept();
}

void MainWindow::dragMoveEvent(QDragMoveEvent *event)
{
    event->accept();
}

void MainWindow::dropEvent(QDropEvent *event)
{
    if (event->mimeData()->hasFormat("text/uri-list")) {
        QList<QUrl> urls = event->mimeData()->urls();
        if (urls.isEmpty())
            return;
        QString fileName = urls.first().toLocalFile();
        if (fileName.isEmpty())
            return;
        setWindowTitle(tr("%1 - %2").arg(fileName).arg(tr("Drag File")));
    }
}

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MainWindow has just one widget, textEdit, defined by:

MyTextEdit::MyTextEdit(QWidget *parent)
    : QTextEdit(parent)
{
    setAcceptDrops(true);
}
 
void MyTextEdit::dragEnterEvent(QDragEnterEvent *e)
{
    if (e->source()) {
        if (e->source() == viewport()) {
            e->accept();
        }
    }
}

MyTextEdit::MyTextEdit(QWidget *parent)
    : QTextEdit(parent)
{
    setAcceptDrops(true);
}

void MyTextEdit::dragEnterEvent(QDragEnterEvent *e)
{
    if (e->source()) {
        if (e->source() == viewport()) {
            e->accept();
        }
    }
}

To copy to clipboard, switch view to plain text mode 

textEdit accepts only "self" drops, so inserted text can then be moved or copied.
What is the reason of the pointer flickering? How can i remove it?
Thanks.

[guiQt]

Bump

[guiQt]

Looking for an answer

[guiQt]

Rebump

[Lykurg]

I can't see any problem in your code, so can you please provide a minimal compilable example reproducing your problem.

[guiQt]

droptest example
Problem shows up when you try to move/copy any entered word by dragging/Ctrl+dragging.

[Lykurg]

Can't reproduce it here on Mac. Where did you see it, Linux (which) or Windows or both?

[guiQt]

Ubuntu 10.04. Not tested on Windows.

[Zlatomir]

I have tested on kubuntu 10.4 and there is no "flicker", and can test on ubuntu, but a little bit later

LE:tested on ubuntu 10.4 and didn't flicker.

[guiQt]

Well, I'm pleased with the correctness of the code, but astonished with the configuration of my system.
Can't think about anything correlated...

[tbscope]

Try playing with performance settings.

- Update your graphics driver
- Try disabling some desktop effects