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[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.] ** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to qtsystems-opensource-src in Ubuntu. https://bugs.launchpad.net/bugs/1646080 Title: Mir-backed InputDeviceModel’s count property is not updated timely Status in qtsystems-opensource-src package in Ubuntu: New Bug description: I’m trying to use InputDeviceModel from QML with the following example: import QtQuick 2.4 import QtSystemInfo 5.5 Item { InputDeviceModel { id: idm filter: InputInfo.Mouse onCountChanged: console.log("mice model count:", devices, count) onAdded: console.log("added mouse:", inputDevice, count) onRemoved: console.log("removed mouse:", deviceId, count) } readonly property bool hasMouse: idm.count > 0 onHasMouseChanged: console.log("has mouse:", hasMouse) } When I launch the example with qmlscene on my arale with no mouse connected, I’m not seeing any output (expected). Then I connect a bluetooth keyboard/mouse combo, and I’m seeing the following: mice model count: 1 0 added mouse: QInputDevice(0x17f6298) 1 (note how 'hasMouse', which supposedly was initially false, hasn’t been updated) Then I disconnect the combo, and I’m seeing the following: mice model count: 0 1 has mouse: true removed mouse: 15 0 Then I connect it again, and I’m seeing the following: mice model count: 1 0 has mouse: false added mouse: QInputDevice(0x18ee508) 1 It appears the countChanged property is emitted before a device is added to/removed from the model, and thus the row count hasn’t actually been updated yet. So any property binding that relies on 'count' will have an incorrect value. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qtsystems-opensource-src/+bug/1646080/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
