QML provides in its MouseArea component a PressAndHold signal, when a mouse area is pressed for a "long duration" http://doc.qt.io/qt-5/qml-qtquick-mousearea.html#pressAndHold-signal
this duration is set to 800ms, and I find nowhere a way to modify this duration. Can it be done and if so, how can I do that?
Thanks!
If you will see the MouseArea source (Src/qtdeclarative/src/quick/items/qquickmousearea.cpp) you find this line:
d->pressAndHoldTimer.start(qApp->styleHints()->mousePressAndHoldInterval(), this);
The durations value came from QStyleHints but it's read-only since the value is platform specified. So the answer to your question: "No", if you are not going to change the source.
But you still can emulate this events, for example:
MouseArea {
property int pressAndHoldDuration: 2000
signal myPressAndHold()
anchors.fill: parent
onPressed: {
pressAndHoldTimer.start();
}
onReleased: {
pressAndHoldTimer.stop();
}
onMyPressAndHold: {
console.log("It works!");
}
Timer {
id: pressAndHoldTimer
interval: parent.pressAndHoldDuration
running: false
repeat: false
onTriggered: {
parent.myPressAndHold();
}
}
}
running property of the Timer to parent.pressed and get rid of the onPressed and onReleased handlers.
QT += gui_private, there is no direct setMousePressAndHoldInterval available (at least I didn't find it). I guess this property is "The Devil" :D
Yes, this can be directly configured with setMousePressAndHoldInterval() (added in November 2015), e.g.:
int pressAndHoldInterval = 2000; // in [ms]
QGuiApplication::styleHints()->setMousePressAndHoldInterval(pressAndHoldInterval);
Put the above at the beginning in your main(), along with
#include <QStyleHints>
and it will globally set the interval as desired.
NOTE #1: As per the Qt bug report, this is a system-wide configuration, so individual MouseArea components cannot be fine-tuned.
NOTE #2: In the source code, the doxygen lists this as \internal so this might be removed/refactored without warning.
Since Qt 5.9, the property pressAndHoldInterval overrides the elapsed time in milliseconds before pressAndHold is emitted.
import QtQuick 2.9 // 2.9 or higher
MouseArea {
pressAndHoldInterval: 100 // duration of 100ms
}
