$ export QT_LOGGING_RULES="qt.qpa.input.*.debug=true"
$ ./touchscreen-test
qt.qpa.input.devices: register QInputDevice(QPointingDevice("Virtual core pointer" Mouse id=2 seat=30002 caps=Position|Scroll|Hover)
qt.qpa.input.devices: register QInputDevice(QInputDevice("Virtual core keyboard", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=3, seat='30002')
qt.qpa.input.devices: input device  "Virtual core XTEST pointer" ID 4
qt.qpa.input.devices:    has 10 buttons
qt.qpa.input.devices:    has valuator "Rel X" recognized? true
qt.qpa.input.devices:    has valuator "Rel Y" recognized? true
qt.qpa.input.devices:    it's a scrolling device
qt.qpa.input.devices:    it's a mouse
qt.qpa.input.devices: register QInputDevice(QPointingDevice("Virtual core XTEST pointer" Mouse id=4 seat=30002 caps=Position|Scroll|Hover)
qt.qpa.input.devices: register QInputDevice(QInputDevice("Virtual core XTEST keyboard", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=5, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("Power Button", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=6, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("Video Bus", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=7, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("Video Bus", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=8, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("Power Button", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=9, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("Sleep Button", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=10, seat='30002')
qt.qpa.input.devices: input device  "Logitech MK700" ID 11
qt.qpa.input.devices:    has 7 buttons
qt.qpa.input.devices:    has valuator "Rel X" recognized? true
qt.qpa.input.devices:    has valuator "Rel Y" recognized? true
qt.qpa.input.devices:    has valuator "Rel Horiz Scroll" recognized? true
qt.qpa.input.devices:    has valuator "Rel Vert Scroll" recognized? true
qt.qpa.input.devices:    it's a scrolling device
qt.qpa.input.devices:    it's a mouse
qt.qpa.input.devices: register QInputDevice(QPointingDevice("Logitech MK700" Mouse id=11 seat=30002 caps=Position|Scroll|Hover)
qt.qpa.input.devices: input device  "Logitech M705" ID 12
qt.qpa.input.devices:    has 20 buttons
qt.qpa.input.devices:    has valuator "Rel X" recognized? true
qt.qpa.input.devices:    has valuator "Rel Y" recognized? true
qt.qpa.input.devices:    has valuator "Rel Horiz Scroll" recognized? true
qt.qpa.input.devices:    has valuator "Rel Vert Scroll" recognized? true
qt.qpa.input.devices:    it's a scrolling device
qt.qpa.input.devices:    it's a mouse
qt.qpa.input.devices: register QInputDevice(QPointingDevice("Logitech M705" Mouse id=12 seat=30002 caps=Position|Scroll|Hover)
qt.qpa.input.devices: input device  "Weida Hi-Tech CoolTouch System" ID 13
qt.qpa.input.devices:    has 7 buttons
qt.qpa.input.devices:    has valuator "Abs MT Position X" recognized? true
qt.qpa.input.devices:    has valuator "Abs MT Position Y" recognized? true
qt.qpa.input.devices:    has valuator "Rel Horiz Scroll" recognized? true
qt.qpa.input.devices:    has valuator "Rel Vert Scroll" recognized? true
qt.qpa.input.devices:    it's a scrolling device
qt.qpa.input.devices:    has touch class with mode 1
qt.qpa.input.devices: unexpectedly missing RelVert/HorizWheel atoms for touchpad with scroll capability QPointingDevice("Weida Hi-Tech CoolTouch System" TouchScreen id=13 seat=30002 ptrType=Finger caps=Position|NormalizedPosition|Scroll maxPts=10)
qt.qpa.input.devices: register QInputDevice(QPointingDevice("Weida Hi-Tech CoolTouch System" TouchScreen id=13 seat=30002 ptrType=Finger caps=Position|NormalizedPosition|Scroll maxPts=10)
qt.qpa.input.devices:    it's a touchscreen with type 2 capabilities 0x121 max touch points 10
qt.qpa.input.devices: input device  "ELAN0509:00 04F3:316E Mouse" ID 14
qt.qpa.input.devices:    has 7 buttons
qt.qpa.input.devices:    has valuator "Rel X" recognized? true
qt.qpa.input.devices:    has valuator "Rel Y" recognized? true
qt.qpa.input.devices:    has valuator "Rel Horiz Scroll" recognized? true
qt.qpa.input.devices:    has valuator "Rel Vert Scroll" recognized? true
qt.qpa.input.devices:    it's a scrolling device
qt.qpa.input.devices:    it's a mouse
qt.qpa.input.devices: register QInputDevice(QPointingDevice("ELAN0509:00 04F3:316E Mouse" Mouse id=14 seat=30002 caps=Position|Scroll|Hover)
qt.qpa.input.devices: input device  "ELAN0509:00 04F3:316E Touchpad" ID 15
qt.qpa.input.devices:    has 7 buttons
qt.qpa.input.devices:    has valuator "Rel X" recognized? true
qt.qpa.input.devices:    has valuator "Rel Y" recognized? true
qt.qpa.input.devices:    has valuator "Rel Horiz Scroll" recognized? true
qt.qpa.input.devices:    has valuator "Rel Vert Scroll" recognized? true
qt.qpa.input.devices:    it's a scrolling device
qt.qpa.input.devices:    it's a mouse
qt.qpa.input.devices: register QInputDevice(QPointingDevice("ELAN0509:00 04F3:316E Touchpad" Mouse id=15 seat=30002 caps=Position|Scroll|Hover)
qt.qpa.input.devices: register QInputDevice(QInputDevice("WCOM0104:00 2D1F:0101 Stylus", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=16, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("WCOM0104:00 2D1F:0101", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=17, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("Intel HID events", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=18, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("AT Translated Set 2 keyboard", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=19, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("Acer WMI hotkeys", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=20, seat='30002')
qt.qpa.input.devices: register QInputDevice(QInputDevice("Logitech MK700", type=QFlags<QInputDevice::DeviceType>(Keyboard), ID=21, seat='30002')
qt.qpa.input.devices: removed QList()
qt.qpa.input.events: XI2 mouse enter 839,1649, mode 0, detail 3, time 103536
qt.qpa.input.events: scrolling device 2 moved from (0.000000, 0.000000) to (0.000000, 255.000000)
qt.qpa.input.events: XI2 touch event type 18 seq 508 detail 4 pos 2271.9, 1241.2 root pos 2271.9, 1241.2 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 38773.408356 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 37659.425354 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  4  state  QFlags<QEventPoint::State>(Pressed)  pos norm  QPointF(0.591644,0.574646)  area  QRectF(2271.88,1241.22 0x0)  pressure  -1
qt.qml.context: qrc:/main.qml:14:9 Parameter "mouse" is not declared. Injection of parameters into signal handlers is deprecated. Use JavaScript functions with formal parameters instead.
qml: Released at  2271.87939453125 ; 1241.2164306640625
qt.qpa.input.events: XI2 touch event type 19 seq 512 detail 4 pos 2271.9, 1241.3 root pos 2271.9, 1241.3 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 38773.408356 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 37661.425323 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  4  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.591644,0.574677)  area  QRectF(2271.88,1241.28 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 20 seq 515 detail 4 pos 2271.9, 1241.3 root pos 2271.9, 1241.3 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 38773.408356 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 37661.425323 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  4  state  QFlags<QEventPoint::State>(Released)  pos norm  QPointF(0.591644,0.574677)  area  QRectF(2271.88,1241.28 0x0)  pressure  -1
qt.qml.context: qrc:/main.qml:20:9 Parameter "mouse" is not declared. Injection of parameters into signal handlers is deprecated. Use JavaScript functions with formal parameters instead.
qml: Pressed at   2271.87939453125 ; 1241.2823486328125
qt.qml.context: qrc:/main.qml:26:9 Parameter "mouse" is not declared. Injection of parameters into signal handlers is deprecated. Use JavaScript functions with formal parameters instead.
qml: Clicked at   2271.87939453125 ; 1241.2823486328125
qt.qpa.input.events: XI2 touch event type 18 seq 518 detail 5 pos 2837.2,  810.0 root pos 2837.2,  810.0 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 48421.261139 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 24575.625000 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  5  state  QFlags<QEventPoint::State>(Pressed)  pos norm  QPointF(0.738861,0.375)  area  QRectF(2837.18,809.988 0x0)  pressure  -1
qml: Released at  2837.183349609375 ; 809.9876708984375
qt.qpa.input.events: XI2 touch event type 19 seq 521 detail 5 pos 2837.3,  810.0 root pos 2837.3,  810.0 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 48423.261108 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 24575.625000 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  5  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.738892,0.375)  area  QRectF(2837.3,809.988 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 524 detail 5 pos 2837.5,  809.8 root pos 2837.5,  809.8 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 48427.261047 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 24569.625092 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  5  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.738953,0.374908)  area  QRectF(2837.53,809.79 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 20 seq 527 detail 5 pos 2837.5,  809.8 root pos 2837.5,  809.8 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 48427.261047 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 24569.625092 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  5  state  QFlags<QEventPoint::State>(Released)  pos norm  QPointF(0.738953,0.374908)  area  QRectF(2837.53,809.79 0x0)  pressure  -1
qml: Pressed at   2837.534912109375 ; 809.7899169921875
qml: Clicked at   2837.534912109375 ; 809.7899169921875
qt.qpa.input.events: XI2 touch event type 18 seq 530 detail 6 pos 1774.5,  631.2 root pos 1774.5,  631.2 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30285.537872 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19149.707794 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Pressed)  pos norm  QPointF(0.462128,0.292206)  area  QRectF(1774.54,631.155 0x0)  pressure  -1
qml: Released at  1774.543212890625 ; 631.1549072265625
qt.qpa.input.events: XI2 touch event type 18 seq 532 detail 7 pos 1564.1,  872.2 root pos 1564.1,  872.2 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 26693.592682 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 26463.596191 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  7  state  QFlags<QEventPoint::State>(Pressed)  pos norm  QPointF(0.407318,0.403809)  area  QRectF(1564.08,872.213 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 535 detail 6 pos 1774.5,  631.2 root pos 1774.5,  631.2 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30285.537872 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19151.707764 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.462128,0.292236)  area  QRectF(1774.54,631.221 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 538 detail 6 pos 1774.5,  631.3 root pos 1774.5,  631.3 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30285.537872 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19153.707733 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.462128,0.292267)  area  QRectF(1774.54,631.287 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 538 detail 7 pos 1564.1,  872.3 root pos 1564.1,  872.3 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 26693.592682 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 26465.596161 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  7  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.407318,0.403839)  area  QRectF(1564.08,872.279 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 542 detail 6 pos 1774.7,  631.4 root pos 1774.7,  631.4 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30287.537842 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19157.707672 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.462158,0.292328)  area  QRectF(1774.66,631.419 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 542 detail 7 pos 1564.1,  872.4 root pos 1564.1,  872.4 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 26693.592682 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 26469.596100 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  7  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.407318,0.4039)  area  QRectF(1564.08,872.411 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 547 detail 6 pos 1774.7,  631.6 root pos 1774.7,  631.6 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30287.537842 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19163.707581 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.462158,0.292419)  area  QRectF(1774.66,631.616 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 547 detail 7 pos 1564.1,  872.5 root pos 1564.1,  872.5 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 26693.592682 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 26473.596039 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  7  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.407318,0.403961)  area  QRectF(1564.08,872.543 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 552 detail 6 pos 1774.8,  631.8 root pos 1774.8,  631.8 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30289.537811 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19169.707489 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.462189,0.292511)  area  QRectF(1774.78,631.814 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 552 detail 7 pos 1564.2,  873.1 root pos 1564.2,  873.1 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 26695.592651 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 26491.595764 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  7  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.407349,0.404236)  area  QRectF(1564.19,873.136 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 557 detail 6 pos 1774.9,  632.0 root pos 1774.9,  632.0 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30291.537781 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19175.707397 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.462219,0.292603)  area  QRectF(1774.89,632.012 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 557 detail 7 pos 1564.3,  873.8 root pos 1564.3,  873.8 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 26697.592621 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 26511.595459 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  7  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.407379,0.404541)  area  QRectF(1564.31,873.795 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 562 detail 6 pos 1775.1,  632.2 root pos 1775.1,  632.2 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30295.537720 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19181.707306 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.46228,0.292694)  area  QRectF(1775.13,632.21 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 562 detail 7 pos 1564.3,  874.5 root pos 1564.3,  874.5 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 26697.592621 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 26533.595123 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  7  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.407379,0.404877)  area  QRectF(1564.31,874.52 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 19 seq 566 detail 6 pos 1775.4,  632.5 root pos 1775.4,  632.5 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30299.537659 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19189.707184 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Updated)  pos norm  QPointF(0.462341,0.292816)  area  QRectF(1775.36,632.473 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 20 seq 570 detail 7 pos 1564.3,  874.5 root pos 1564.3,  874.5 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 26697.592621 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 26533.595123 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  7  state  QFlags<QEventPoint::State>(Released)  pos norm  QPointF(0.407379,0.404877)  area  QRectF(1564.31,874.52 0x0)  pressure  -1
qt.qpa.input.events: XI2 touch event type 20 seq 570 detail 6 pos 1775.4,  632.5 root pos 1775.4,  632.5 on window 4400011
qt.qpa.input.events:    valuator    Abs MT Position X value 30299.537659 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    valuator    Abs MT Position Y value 19189.707184 from range 0.000000 -> 65535.000000
qt.qpa.input.events:    touchpoint  6  state  QFlags<QEventPoint::State>(Released)  pos norm  QPointF(0.462341,0.292816)  area  QRectF(1775.36,632.473 0x0)  pressure  -1
qml: Pressed at   1775.363525390625 ; 632.4732666015625