Setting QWidget full screen problem with 2 monitos

[lni]

Hi,

My machine has 2 monitors, I use QWidget::showFullScreen, but it only covers one monitor. I use setGeometry( QRectF( 0, 0, 3840, 1200 ) ), it still shows up in one screen. I have to manually resize the widget to cover both screens.

The QDesktopWidget::availableGeometry return QRect( 0, 0, 1920, 1200 ) and QRect( 1920, 0, 1920, 1200 ).

Is there a way to set QWidget to fully cover both screens inside the code?

Thanks.

[lni]

Anyone please?

[ChrisW67]

Have you tried setGeometry() or separate move() and resize() calls after the window is shown?

[lni]

I did both, as in the following codes, both w1 & w2 are only showing in one screen. Any ideas? Thanks

#include <QApplication>
#include <QWidget>
 
int main( int argc, char** argv )
{
  QApplication app( argc, argv );
 
  QWidget w1;
  w1.setWindowTitle( "w1" );
  w1.setGeometry( QRect( 0, 0, 3840, 1200 ) );
  w1.show();
 
  QWidget w2;
  w2.setWindowTitle( "w2" );
  w2.resize( 3840, 1200 );
  w2.move( 0, 0 );
  w2.show();
 
  return app.exec();
}

#include <QApplication>
#include <QWidget>

int main( int argc, char** argv )
{
  QApplication app( argc, argv );

  QWidget w1;
  w1.setWindowTitle( "w1" );
  w1.setGeometry( QRect( 0, 0, 3840, 1200 ) );
  w1.show();

  QWidget w2;
  w2.setWindowTitle( "w2" );
  w2.resize( 3840, 1200 );
  w2.move( 0, 0 );
  w2.show();

  return app.exec();
}

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[ChrisW67]

You are not calling setGeometry(), resize(), or move() after the window is shown. Try this:

#include <QApplication>
#include <QWidget>
#include <QTimer>
 
class Widget: public QWidget
{
  Q_OBJECT
public:
  explicit Widget(QWidget *p = 0): QWidget(p) {
    QTimer::singleShot(0, this, SLOT(afterShow()));
  }
private slots:
  void afterShow() {
    setGeometry( QRect( 0, 0, 3840, 1200 ) );
// or
//  move(0, 0);
//  resize(3840, 1200);
  }
};
 
int main( int argc, char** argv )
{
  QApplication app( argc, argv );
  Widget w;
  w.show();
  return app.exec();
}
#include "main.moc"

#include <QApplication>
#include <QWidget>
#include <QTimer>

class Widget: public QWidget
{
  Q_OBJECT
public:
  explicit Widget(QWidget *p = 0): QWidget(p) {
    QTimer::singleShot(0, this, SLOT(afterShow()));
  }
private slots:
  void afterShow() {
    setGeometry( QRect( 0, 0, 3840, 1200 ) );
// or
//  move(0, 0);
//  resize(3840, 1200);
  }
};

int main( int argc, char** argv )
{
  QApplication app( argc, argv );
  Widget w;
  w.show();
  return app.exec();
}
#include "main.moc"

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I don't have a dual screen setup to test.

[lni]

Still same problem...showing in one screen only.