Qt: How to hide the main window after minisize and show after clicking systray.

[zsdevX]

I try to use widget->hide(), but it did not work.

widget.ConnectChangeEvent(func(event *core.QEvent) {
if event.Type() == core.QEvent__WindowStateChange &&
widget.WindowState() == core.Qt__WindowMinimized {
fmt.Println("mini_size event")
widget.Hide()
}
})

[therecipe]

Hey

It seems like you need to set the window state to core.Qt__WindowNoState first for this to work.
(at least on macOS)
But it rather ugly on macOS, because the app is minimized and then shown again and then hidden.

For this to properly work, you would need to override the nativeEvent (b) or work around this by disabling the minimize button and using the close button instead (c).

package main

import (
    //"unsafe"

    "github.com/therecipe/qt/core"
    "github.com/therecipe/qt/widgets"
)

func main() {
    app := widgets.NewQApplication(0, nil)

    w := widgets.NewQMainWindow(nil, 0)

    //a) this is ugly on macOS, but it seems to work
    /*
        w.ConnectChangeEvent(func(event *core.QEvent) {
            if event.Type() == core.QEvent__WindowStateChange {
                if w.WindowState() == core.Qt__WindowMinimized {
                    println("mini_size event")
                    w.SetWindowState(core.Qt__WindowNoState)
                    w.Hide()
                }
            }
        })
    */

    //b)
    /*
        w.ConnectNativeEvent(func(eventType *core.QByteArray, message unsafe.Pointer, result *int) bool {
            //catch the minimize event for every OS
            return w.NativeEventDefault(eventType, message, result)
        })
    */

    //c)
    //make the window a dialog to hide the minimize button
    //and don't exit the app if the last window is closed/hidden
    //but then you will need to provide some other way to close your application
    w.SetWindowFlags(core.Qt__Dialog)
    app.SetQuitOnLastWindowClosed(false)

    w.Show()

    //systray
    sys := widgets.NewQSystemTrayIcon(nil)
    sys.SetIcon(w.Style().StandardIcon(widgets.QStyle__SP_MessageBoxCritical, nil, nil))
    sys.ConnectActivated(func(reason widgets.QSystemTrayIcon__ActivationReason) {
        if reason == widgets.QSystemTrayIcon__Trigger {
            w.Show()
        }
    })
    menu := widgets.NewQMenu(nil)
    exit := menu.AddAction("Exit")
    exit.ConnectTriggered(func(bool) { app.Exit(0) })
    sys.SetContextMenu(menu)
    sys.Show()

    widgets.QApplication_Exec()
}

[zsdevX]

thanks, the 'a' works fine for me.