[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 &lt; formats.count(); counter++)
    {
        QByteArray d = mime-&gt;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