[SOLVED] QClipboard::mimeData() returns null

[cmazieri]

Hello,

I am trying to use QClipboard on N9 and Meego and it looks like does not work, the same code works when running in Desktop.

I have tried the following simple code both on N9 simulator and nemo virtual machine:

widget class header
@
#ifndef WIDGET_H
#define WIDGET_H

#include <QWidget>
class QPushButton;
class QClipboard;

class Widget : public QWidget
{
Q_OBJECT
public:
explicit Widget(QWidget *parent = 0);
public slots:
void putUrls();
void putText();
void showData();
void clipboardChanged();
private:
QPushButton *getBtn;
QPushButton *putUrlBtn;
QPushButton *putTextBtn;
QClipboard *clip;
};
#endif // WIDGET_H
@

widget class
@
#include "widget.h"
#include <QPushButton>
#include <QVBoxLayout>
#include <QClipboard>
#include <QDebug>
#include <QMimeData>
#include <QStringList>
#include <QUrl>
#include <QTemporaryFile>
#include <QApplication>
#include <QShowEvent>
#include <QWidget>

Widget::Widget(QWidget *parent) :
QWidget(parent)
, clip(0)
{
QVBoxLayout *lay = new QVBoxLayout(this);
getBtn = new QPushButton("show clipboard", this);
lay->addWidget(getBtn);
putUrlBtn = new QPushButton("put url", this);
lay->addWidget(putUrlBtn);
putTextBtn = new QPushButton("put text", this);
lay->addWidget(putTextBtn);
connect(getBtn, SIGNAL(clicked()), this , SLOT(showData()));
connect(putUrlBtn, SIGNAL(clicked()), this, SLOT(putUrls()));
connect(putTextBtn,SIGNAL(clicked()), this, SLOT(putText()));
}

void Widget::putText()
{
QClipboard * clipboard = QApplication::clipboard();
if ( clipboard ) {
clipboard->setText( QLatin1String("has text") );
}else {
qDebug() << Q_FUNC_INFO << "no clipboard";
}
}

void Widget::putUrls()
{
QTemporaryFile temp;
temp.open();
QByteArray d ("11212121212\n");
temp.write(d) ;
temp.close();
QClipboard * clipboard = QApplication::clipboard();
if ( clipboard )
{
QMimeData *mime= new QMimeData();
QUrl url(QUrl::fromLocalFile(temp.fileName()));
qDebug() << "valid" << url.isValid() << url.toString();
QList<QUrl> files;
files.append(url);
mime->setUrls(files);
clipboard->setMimeData(mime, QClipboard::Clipboard);
qDebug() << "\n\n--------- ";
}
}

void Widget::showData()
{
QClipboard *clipboard = QApplication::clipboard();
if ( clipboard )
{
if (clip == 0)
{
clip = clipboard;
connect(clip, SIGNAL(dataChanged()), this, SLOT(clipboardChanged()));
}
const QMimeData * mime = clipboard->mimeData(QClipboard::Clipboard);
if (mime == 0)
{
qDebug("QClipboard::mimeData() returns null");
return;
}

    QStringList formats = mime->formats();
    for(int counter=0; counter < formats.count(); counter++)
    {
        QByteArray d = mime->data(formats.at(counter));
        if (!d.isEmpty())
        {
            qDebug() << "format" <&lt; formats.at(counter) &lt;&lt; "data" << d << endl;
        }
    }
  }

}

void Widget::clipboardChanged()
{
qDebug() << Q_FUNC_INFO << "clipboard changed";
}
@

main
@

#include <QApplication>
#include "widget.h"

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Widget w;
w.show();
return a.exec();
}
@

[bootchk]

Since QClipboard is a wrapper to a global clipboard object provided by the underlying operating system (some people say just the underlying window system) of a platform(device), could it be that those platforms are so primitive they do not support such a clipboard?

Or is the simulator (of the platform) so primitive that it omits the clipboard of the platform?

How hard would it be to test on the real platform?

[cmazieri]

Thanks,

Nemo emulator is a real Linux and uses X window, N9 emulator I do not know.

I will try to test that in a N9 device.

[cmazieri]

Hi Bootchk you' re right,

In N9 device it works as expected,

I thought it would work in emulators.

Thank you