Drop image into a QLabel

JessyNay

Hi, I need to drop an external Image into a QLabel.

I made a class called LblImage, it implements dropEvent

@
void dropEvent(QDropEvent event)
{
if (this->pixmap()->isNull()){
if (event->mimeData()->hasImage()) {
event->accept();
event->setDropAction(Qt::MoveAction);
QByteArray pieceData = event->mimeData()->data("image/");
QPixmap img;
img.loadFromData(pieceData);
setPixmap(img);
} else {
event->ignore();
}
}
}
@

And in the constructor
@
setAcceptDrops(true);
@
setAcceptDrops(true);
If I try to drag and drop an image it does nothing, what am I missing? Thanks!

Edit: I'm dragging from a file manager, so I receive text, I updated the method

@
void dropEvent(QDropEvent event){
if (event->mimeData()->hasImage()){
event->accept();
event->setDropAction(Qt::MoveAction);
QByteArray pieceData = event->mimeData()->data("image/");
QPixmap img;
img.loadFromData(pieceData);
setPixmap(img);
setText(pieceData);

    }if (event->mimeData()->hasText()){
        event->accept();
        event->setDropAction(Qt::MoveAction);
        QByteArray pieceData = event->mimeData()->data("text/plain");
        QPixmap img;
        img.load(pieceData.mid(pieceData.indexOf("file://")+7));
        setPixmap(img);
    }
    else {
        event->ignore();
    }

}

@

But Still it's now loading my Image, how should I load it to the label?

p-himik

Here is some code from my old app:
@void ProductImage::dragEnterEvent( QDragEnterEvent* event )
{
if( event->mimeData()->hasImage()
|| event->mimeData()->hasFormat( "text/uri-list" ) )
{
event->acceptProposedAction();
}
}

void ProductImage::dropEvent( QDropEvent* event )
{
getImagesFromMimeData( event->mimeData() );
event->acceptProposedAction();
}

void ProductImage::getImagesFromMimeData( const QMimeData* mimeData )
{
if( mimeData->hasImage() )
{
addImage( QPixmap::fromImage( qvariant_cast< QImage >( mimeData->imageData() ) ) );
}
else if( mimeData->hasUrls() )
{
foreach( QUrl url, mimeData->urls() )
{
addImage( QPixmap( url.path() ) );
}
}
}@

goetz

Mime type "image/*" is not valid. I'm pretty sure you have something like "image/jpeg" or the like. You can use the dropsite app from src/examples/draganddrop to look what's actually inside the drop.

Anyways, I would use method "QMimeData::imageData() ":http://doc.qt.nokia.com/4.7/qmimedata.html#imageData to extract the image from the drop data.