Open/show and close/hide popup by QML code

[m3g1dd]

There is a Q_PROPERTY in my registered C++ class:

// C++ Class
Q_PROPERTY(bool inProgress READ inProgress WRITE setInProgress NOTIFY inProgressChanged)

... based on which I intend to show a QML popup:

Popup {
    id: popup
    visible: cppClass.inProgress // Bind visibility to C++ Q_PROPERTY
}

But the pop doesn't show up. If change visible to true the popup is always shown of course.

Tried so far

Tried to use signal/slot connections to open/show the popup, but doesn't work:

Popup {
    id: popup
    visible: false

    Connections {
        target: cppClass
        onInProgressChanged: {
            if (cppClass.inProgress) {
                console.log("open ...")                   // This text is logged correctly
                popup.visible = Qt.binding(function(){return true}) // popup is NOT shown
                popup.open()                                        // popup is NOT opened
            } else {
                console.log("close ...")
                popup.visible = Qt.binding(function(){return false})
                popup.close()
            }
        }
    }
}

What am I missing?

[sierdzio]

Popup {
    id: popup
    visible: cppClass.onProgress // Bind visibility to C++ Q_PROPERTY
}

You have a typo here (should be inProgress, not onProgress).

The code seems correct, it should work. Some suggestions:

• make sure you don't have that typo in actual code :-)
• perhaps inProgress is changed when some very heavy, CPU-blocking operation is ongoing? Then QML engine might not have time to show the GUI changes. Try setting inProgress first, then starting the CPU-heavy operation after some time, or in a different thread
• maybe you are setting inProgress to false immediately after you set it to true (the operation completes very fast)?
• make sure the inProgressChanged signal is being emitted

[m3g1dd]

@sierdzio Thanks! There is no typo in the actual code. I'm going to check the other suggested items.

[m3g1dd]

@sierdzio The code worked by triggering C++ signals further away from CPU-blocking operation.