[Interest] Slow touchscreen (eGalax) response in QML using evdevtouch plugin and eglfs platform

[Rutledge Shawn]

On 27 May 2014, at 3:06 PM, Georgije Bosiger wrote:

> From what I've seen it turns out that the problem is in "onPositionChanged" signal. For some reason attached handler to this signal is not executed on faster movements when evdevtouch is used, but it's OK for the evdevmouse. This realization lead me to use the timer instead, so that now I make changes on defined interval while touch is pressed. This way response to the input is fast.

It's too bad that you need a workaround, so it would be nice to narrow down why it happens.  I don't think we were trying to do event compression until https://codereview.qt-project.org/#change,82975 , but that's only on dev branch so far… so I guess it must be happening in the device or the driver.