Empty image in QClipboard

angeleyes

Hello
I am trying to get an image from the clipboard using this code. I click on the "copy image" button in Google Chrome and then press "Shift + Insert" in my application, I get to the first branch of the if-statement and see "QRect (0,0 0x0)" in the console. Only after I press "Shift + Insert" several times - the image will appear - QRect(0,0 1280x720).

uname -a Linux max-pc 5.4.0-70-generic #78-Ubuntu SMP Fri Mar 19 13:29:52 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

What am i doing wrong? regards, max

void CanvasScene::keyPressEvent(QKeyEvent *event)
{
    switch (event->key()) {
    case (Qt::Key_Insert):
        if (event->modifiers() & Qt::ShiftModifier) {
            pasteFromClipboard();
        }
    break;
    default:
        QGraphicsScene::keyPressEvent(event);
    break;
    }
}

void CanvasScene::pasteFromClipboard()
{
    const QClipboard *clipboard = QApplication::clipboard();
    const QMimeData *mimedata = clipboard->mimeData();

    if (mimedata->hasImage()) {
        LOG_DEBUG(logger, "IMAGE");
        QImage image = clipboard->image(QClipboard::Clipboard);//qvariant_cast<QImage>(mimedata->imageData());
        qDebug()<<image.rect();
    } else if (mimedata->hasText()) {
        LOG_DEBUG(logger, "TEXT: ", mimedata->text().toStdString());
    } else {
        LOG_DEBUG(logger, "CANNOT DISPLAY DATA");
    }
}

SGaist

Hi,

Did you check the notes about X11 clipboard in the QClipBoard documentation ? There might be some thing there applying to your case.

angeleyes

@SGaist yes of course.
I think this is the answer to my question
https://stackoverflow.com/questions/66828571/mime-hasimage-returns-true-but-mime-imagedata-returns-none-on-linux