QWidgetAction in systemtray works in centos but unable to display in ubuntu

[yveszhang]

Qt version: 5.6.1
OS version:

1. centos 6.3
2. ubuntu 14.04

here is the code which run normal in centos but fails in ubuntu.

In ubuntu , the test action shows normally however the custom widget turn out to be a blank action.

why this happened?

#include <QApplication>
#include <QDialog>
#include <QBoxLayout>
#include <QToolBar>
#include <QStyle>
#include <QWidgetAction>
#include <QSpinBox>
#include <QMenu>

#include <QSystemTrayIcon>

class MyWidgetAction : public QWidgetAction
{
public:
    MyWidgetAction(QObject *parent) : QWidgetAction(parent) {}
    virtual ~MyWidgetAction() {}
protected:
    virtual QWidget *createWidget(QWidget *parent) {
        QSpinBox *sb = new QSpinBox(parent);
        sb->setToolTip("Spin");
        return sb;
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QMenu menu;
    menu.addAction(QString("test"));
    QWidgetAction *wa = new MyWidgetAction(&menu);
    menu.addAction(wa);
    tray.setContextMenu(&menu);
    tray.show();
    return a.exec();
}

[A Former User]

Hi! What desktop environment are you using on Ubuntu? Unity?

[yveszhang]

the desktop environment is unity