QT drag and drop of image size problem after taking multple view port?

amarism

I am able to drag image from listwidget thumbnail and able to drop image inside the OpenG view port.

I am creating a new class openGL and class inhert the OpenGLWidget class. By using new class object i am create multiple view port .So, it will accept drop of image.

For 1 view port i am able to fix the size. But i am extract when i have 10 view port.

for fixing the size i am using this one code:-

void openGL::dropEvent(QDropEvent *event)
{
	const QMimeData *mimeData = event->mimeData();

	QImage image = qvariant_cast<QImage>(event->mimeData()->imageData());

	if (mimeData->hasFormat("application/x-qabstractitemmodeldatalist")) {
		QByteArray encoded = mimeData->data("application/x-qabstractitemmodeldatalist");
		QDataStream stream(&encoded, QIODevice::ReadOnly);

		while (!stream.atEnd()) {
			int row;
			int col;
			QMap<int, QVariant> roleDataMap;
   			stream >> row >> col >> roleDataMap;
  
			QIcon icon = roleDataMap.value(1).value<QIcon>();
			
			m_pixmap = icon.pixmap(icon.availableSizes().first());
		
			update();
		}
	}
	else {
		event->ignore();
	}


void openGL::paintGL()
{
	QPainter painter(this);
	
	painter.drawPixmap(0,0, m_pixmap.scaled(1000, 500, Qt::KeepAspectRatioByExpanding, Qt::SmoothTransformation));
//for single view port i will fix width and height
}

Any suggestion is very helpful

Thank you in advance

SGaist

Hi,

Why do you want to fix the size ?

amarism

@SGaist fixing of size is working but i want to take dynamic size respect to view port .

SGaist

It might sound silly, but why not just use the view port size in your scaled call rather than fixed values.

amarism

@SGaist i will try to get the view port size . but it will not passes the actual size .

int w =((QWidget*)view[0])->width();
int h = ((QWidget*)view[0])->height();

I will get the grid_layout size though this code :-

    QSize sz = this->ui->gridLayout_8->sizeHint();

but it will pass the only single view port size.

SGaist

Why not use just size() ?

mrjj

Hi
Just to be sure. you are asking about the SIZE of the openGl widget and not the size of
the openGl viewport ?
https://bugreports.qt.io/browse/QTBUG-64635