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Handle touchscreens without BTN_TOUCH

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Some touchscreens (like the Lumio crystaltouch in single touch mode) send
BTN_LEFT rather than BTN_TOUCH:

Input driver version is 1.0.1
Input device ID: bus 0x3 vendor 0x202e product 0x5 version 0x111
Input device name: "LUMIO Inc LUMIO CrystalTouch ver 1.1C"
Supported events:
  Event type 0 (Sync)
  Event type 1 (Key)
    Event code 272 (LeftBtn)
    Event code 273 (RightBtn)
    Event code 274 (MiddleBtn)
  Event type 2 (Relative)
    Event code 9 (Misc)
  Event type 3 (Absolute)
    Event code 0 (X)
      Value    650
      Min        0
      Max     4095
    Event code 1 (Y)
      Value   3221
      Min        0
      Max     4095
  Event type 4 (Misc)
    Event code 4 (ScanCode)
Testing ... (interrupt to exit)
Event: time 1305882024.934011, type 4 (Misc), code 4 (ScanCode), value 90001
Event: time 1305882024.934017, type 1 (Key), code 272 (LeftBtn), value 1
Event: time 1305882024.934029, type 3 (Absolute), code 0 (X), value 270
Event: time 1305882024.934034, type 3 (Absolute), code 1 (Y), value 1513
Event: time 1305882024.934039, type 2 (Relative), code 9 (Misc), value 1

This causes evdev to handle these device as a mouse rather than a
touchscreen, which naturally doesn't work very well. We already internally
translate BTN_TOUCH as BTN_LEFT, so accept this kind of devices as
touchscreens by checking for devices with BTN_LEFT, absolute X/Y and NO
relative X/Y axes.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Peter Korsgaard
2011-05-24 09:44:05 +02:00
committed by Peter Hutterer
parent e9d96e87ac
commit 74151b3c52
1 changed files with 6 additions and 0 deletions
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6
src/evdev.c
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@@ -1712,6 +1712,12 @@ EvdevProbe(InputInfoPtr pInfo)
pEvdev->flags |= EVDEV_TOUCHSCREEN;
pEvdev->flags |= EVDEV_BUTTON_EVENTS;
}
} else if (!(TestBit(REL_X, pEvdev->rel_bitmask) &&
TestBit(REL_Y, pEvdev->rel_bitmask)) && has_lmr) {
/* some touchscreens use BTN_LEFT rather than BTN_TOUCH */
xf86IDrvMsg(pInfo, X_PROBED, "Found absolute touchscreen\n");
pEvdev->flags |= EVDEV_TOUCHSCREEN;
pEvdev->flags |= EVDEV_BUTTON_EVENTS;
}
}
}