Qt/QML: TextInput with Keys.onPressed receives only DEL key and not other keys

MagneticCore

Hello

System: Qt/QML 5.3.1 Android with Windows QtCreator

In my main QML page, a Loader is used to load a second QML page. This second QML page contains a TextInput with Keys.onPressed. This TextInput receives only the DEL key and not other keys from standard virtual keyboard.

Important: My second QML is dynamically loaded by the Loader, ie given by loader.source = "MyTextInput.qml"

How to do to receive all keys in the TextInput/Keys.onPressed event handler?

MainPage.qml:
@ApplicationWindow {
...
Loader {
id: loader
focus: true
}
}@

MyTextInput.qml:

@Column {
..
TextInput {
focus: true
Keys.priority: Keys.BeforeItem
Keys.onPressed {
console.log(event.text);
}
}
}@

Thank you

p3c0

Hi,

I just tested the scenario you explained on Android and it works fine. It receives all Keys.
Can you post the complete code here ?
Also which Android device you were testing it on ?

MagneticCore

Hi,

I simplified my example as follow, but still impossible to receive keys except DEL key by onPressed or onReleased keys handler.
The device I use for testing is a Samsung Tab 3 8", with Android 4.1.2

@import QtQuick 2.2
import QtQuick.Window 2.1
import QtQuick.Controls 1.2

ApplicationWindow {
visible: true
width: 640
height: 400

toolBar: ToolBar {
Row {
anchors.fill: parent
ToolButton {
text: "Exit"
onClicked: Qt.quit();
}
}
}

TextInput {
width: 200
height: 40
focus: true

Keys.onPressed: {
    console.log("Key="+event.key+" "+event.text);
}
Keys.onReleased: {
    console.log("Key="+event.key+" "+event.text);
}

}
}@

On debug screen, the following error is displayed each time a key is pressed on the virtual keyboard:

W/Qt (26304): kernel\qmetaobject.cpp:1458 (static bool QMetaObject::invokeMethod(QObject*, const char*, Qt::ConnectionType, QGenericReturnArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument, QGenericArgument)): QMetaObject::invokeMethod: No such method QQuickTextInput::inputMethodQuery(Qt::InputMethodQuery,QVariant)

p3c0

I misunderstood your question in first place. It is currently not possible to capture using the Virtual Keyboard on mobile platforms.

MagneticCore

Thank you Dinosaur Breeder,

Do you have a link that explains this unavailable feature for mobile platforms?
And there is a plan to add it?

If no, I will enter an issue in Qt Tracker to ask for it.

p3c0

I actually asked it over the IRC channel. They replied that it was more like a feature request. I'll post the whole conversation

bq.
<astregon> Is there a way to get key pressed event for TextInput in Android devices ?
<astregon> i tried using Keys.onPressed
<astregon> it just captures del and enter keys
<astregon> not other keys i.e digits/alphabets
<lqi_> i guess others are from the virtual keyboard(input method) event instead of keyboard event
<astregon> lqi, i didn't understand
<lqi> sry, /s/others/they
<astregon> i'm using the virtual keyboard
<astregon> so it Keys event handler doesn't capture it ?
<astregon> lqi, is it a bug ?
<lqi> Keys are only for real keyboard
<lqi> i don't think it's a bug
<lqi> it's more like a feature request if you want to have
<astregon> ok, so is there a workaround for it for now ?
<lqi> not sure yet
<lqi> perhaps you could ask some qt&android experts
<astregon> ok.. thanks
<jpnurmi> astregon: mobile platforms with virtual keyboards & predictive input etc. are a whole different world than good old physical keyboards. there are no key events as such, but the input method is in a "composing" state until it commits the composed content. furthermore, the actual textual content of TextInput doesn't change meanwhile the input method is composing. it just visually shows the currently composed text
<jpnurmi> i'm not an input method expert, but this is my interpretation of the issue :)
<astregon> jpnurmi, but then how is it able to capture del and enter ?
<jpnurmi> astregon: using the input method events as lqi described
<jpnurmi> i'm not sure what would be the best solution to expose this information to qml, but we certainly need to do it in a way or another
<jpnurmi> afaik they tried faking key events on ios or android, but it turned out to be a dead end
<astregon> jpnurmi, Alright, thanks. Hoping it would be implemented as early as possible. I see lot of those questions on forums.

MagneticCore

Hello,

I reported a suggestion for this missing feature in QTBUG reports:
"https://bugreports.qt-project.org/browse/QTBUG-40803":https://bugreports.qt-project.org/browse/QTBUG-40803

PauloPina

Hello,

The reported error is occurring using physical keyboard at Android too.

I also have verified that none QML objects is getting Active Focus at Android Devices and so does not catch the KeyPress events.

Geraud

Hi guys,

As I am currently facing that issue, is there any new developments there?
Or ways to circumvent the issue?

Tiresias

is there a workaround for this issue?