Qt在Mac OS上 - 检测停靠菜单上的点击

Question

I am dropping the system tray icon for the Mac OS version of my application. However there's one small problem: when the user closes the main window the application is supposed to continue to run on the background and the main window should become visible again if the user clicks the dock icon. So far I have found no way of intercepting this click on the icon.

Is there any way to accomplish this with Qt? If not, how should I proceed with the native API to implement this behavior?

I have tried to create a custom application class that implement QApplication so that I can re-implement the macEventFilter but the documentation on this function is scarce.

application.h:

#ifndef APPLICATION_H
#define APPLICATION_H

#include <QApplication>

class QWidget;

class Application : public QApplication
{
    Q_OBJECT

public:

    Application(int, char*[]);
    void setMainWidget(QWidget*);
    bool macEventFilter(EventHandlerCallRef, EventRef);

private:
    QWidget *mainWidget;
};

#endif // APPLICATION_H

application.cpp:

#include <Application.h>
#include <QWidget>

Application::Application(int argc, char *argv[])
    : QApplication(argc, argv)
{
}

void Application::setMainWidget(QWidget *mainWidget)
{
    this->mainWidget = mainWidget;
}

bool Application::macEventFilter(EventHandlerCallRef, EventRef)
{
    mainWidget->show();
    return false;
}

main.cpp:

    #include <QtCore>
    #include <Application.h>
    #include "mainwidget.h"

    int main(int argc, char *argv[]) {
        Application a(argc, argv);

        MainWidget mainWidget;

    #ifdef Q_WS_MAC

        a.setWindowIcon(QIcon(":/resource/army-officer-icon.png"));

    #endif

        a.setMainWidget((QWidget*)&mainWidget);

        mainWidget.show();

        return a.exec(); 
    }

Answer 1

您需要重新实现窗口的closeEvent（） ，然后检查事件是来自X按钮还是其他地方。