Important: Please read the Qt Code of Conduct -

close one window close others

  • i opend three windows by main file .but when close the "coreaction" it closes all the whole app. but other two closes it's window .

    NT : the corecation is a framlesss is closed by tryicon.

    here is the main

    int main(int argc, char *argv[])
        QApplication app(argc, argv);
        // Set application info
        Start s;;
        corefm a;;
        // closing this ,close other two.
        coreaction e;;
        return app.exec();

    and the quiting function of coreaction. by exc this all the window is closing.

    void coreaction::tryicon()  //setup coreaction tryicon
        trayIcon=new QSystemTrayIcon(this);
        trayIconMenu=new QMenu(this);
        QAction *QAshow=new QAction("&Show",this);
        QAction *QAabout=new QAction("&About",this);
        QAction *QAquit=new QAction("&Quit",this);
        connect(QAquit, SIGNAL(triggered()),this,SLOT(close()));
        connect(QAshow, SIGNAL(triggered()),this,SLOT(actionshow()));
        connect(QAabout, &QAction::triggered, this, &coreaction::coreBoxAbout);
        connect(trayIcon, SIGNAL(activated(QSystemTrayIcon::ActivationReason)), this, SLOT(ShowWindow(QSystemTrayIcon::ActivationReason)));

  • Lifetime Qt Champion

    @saber What type are all these windows? Is corecation a MainWindow? Are others QDialog? ...

  • @jsulm
    those are QWidgets.
    there is no mainwindow in the app.

  • Lifetime Qt Champion

    @saber said in close one window close others:

    but other two closes it's window .

    This is correct behaviour - closing a widget does NOT close the whole app

  • @jsulm

    but other two closes it's window .

    that behaviour is good .but why the coreaction is closing it's framless window also the other two window.?

  • Lifetime Qt Champion

    @saber Can you show your coreaction header file?

  • @jsulm

    CoreBox is combination of some common desktop apps.
    CoreBox is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; version 2
    of the License.
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    GNU General Public License for more details.
    You should have received a copy of the GNU General Public License
    along with this program; if not, see {}. */
    #ifndef COREACTION_H
    #define COREACTION_H
    #include "wcalender.h"
    #include "wsystem.h"
    #include "wnetwork.h"
    #include "wcalculator.h"
    #include "wnotes.h"
    #include "wbattery.h"
    #include <QWidget>
    #include <QFocusEvent>
    #include <QCloseEvent>
    #include <QDir>
    #include <QMenu>
    #include <QSystemTrayIcon>
    #include <QTimer>
    #include <QDesktopWidget>
    #include <QDateTime>
    #include <QTimer>
    #include <QFile>
    #include <QDoubleValidator>
    #include "settings/settingsmanage.h"
    #include "utilities/globalfunctions.h"
    #include "about/about.h"
    #include "dashboard/info_manager.h"
    #include "dashboard/upower.h"
    #include "dashboard/battery.h"
    #include "coreshot/coreshotdialog.h"
    namespace Ui {
    class coreaction;
    class coreaction : public QWidget
        explicit coreaction(QWidget *parent = nullptr);
        QSystemTrayIcon *trayIcon;
        void focusOutEvent(QFocusEvent *event);
        void loadsettings();
        void closeEvent(QCloseEvent *event);
        Ui::coreaction *ui;
        SettingsManage sm;
        QMenu *trayIconMenu;
        QDir currentDir;
        QTimer *timer;
        InfoManager *im;
        void widget();
        void tryicon();
        void widgetList();
        bool checkWTime();
        bool checkWCalendar();
        bool checkWSystem();
        bool checkWNetwork();
        bool checkWCalculator();
        bool checkWNotes();
        bool checkWBattery();
    public slots:
        void ShowWindow(QSystemTrayIcon::ActivationReason Reason);
    private slots:
        void showTime();
        void coreBoxAbout();
        void actionshow();
        void on_corepad_clicked();
        void on_screenshot_clicked();
        void on_corepaint_clicked();
        void on_corefm_clicked();
        void on_start_clicked();
        void on_search_clicked();
    #endif // COREACTION_H

  • Lifetime Qt Champion

    @saber Are the other two windows visible when you close coreaction?
    "If this property is true, the applications quits when the last visible primary window (i.e. window with no parent) is closed."
    Also do you do anything special in closeEvent?

  • @jsulm
    when i close the coreaction , the appliction output tab in qt creator shows exited with code 0. so that means other two window is also closed.

    i used that in the main can see that main file in top of this topic.

    yes .i every widow have a close event and that event collect the file path.

  • Lifetime Qt Champion


    Very important question. ( as @jsulm asks)
    Start s and/or corefm a;
    shown on screen when u close coreaction ?

  • @mrjj
    yes. i also tried by minimize corefm and start and then close the coreaction. same result.

    i just want to close all the window independently. close button will close ir's window,no other.

  • Lifetime Qt Champion

    They are not closing each other.
    Read link @jsulm gave for info.

    Seems that App thinks coreaction was last and closes app.

  • @mrjj
    i read the link .and i also tried the setQuitOnLastWindowClosed(false); .same

    so what can i do ?

  • Lifetime Qt Champion

    Well, you must find out why.
    Since doing this

    int main(int argc, char *argv[])
        QApplication app(argc, argv);
        QWidget a;;
        QWidget b;;
        QWidget c;;
        //    MainWindow w;
        return app.exec();

    Do not close at all. windows are stacked on top of each other.
    So that means most likely that something in the project code does something.

    Use debugger and see what is going on. please breakpoint in any closeEvent for coreaction.

  • @mrjj
    just asking, dubugg the closeevent?

    also there is no closeEvent in coreaction.

  • Lifetime Qt Champion

    Then set break point somewhere else :)
    Like destructor.
    Something must happen in code.
    as default sample do NOT close all 3 windows.
    and its very easy to see what is going on with the call stack so
    you just need to beak it somewhere and see what is going on.

  • @mrjj
    ok . i try to debug.
    but one thought in my mind.
    i think window with tray icon with fremless is the cause?
    also the close mathod

    QAction *QAquit=new QAction("&Quit",this);
    connect(QAquit, SIGNAL(triggered()),qApp,SLOT(close()));

  • i got the problem .
    i am calling the qApp to close .that's the cause.

  • @saber this looks really funny...
    Don't mind.

  • Lifetime Qt Champion

    @saber said in close one window close others:

    connect(QAquit, SIGNAL(triggered()),qApp,SLOT(close()));

    Didn't realise it's qApp there :-)
    Sometimes it is something really small/simple and is hard to see.

Log in to reply