View Full Version : qt tslib touchscreen y-axis reversed
gosk
5th September 2011, 16:13
Hi,
In my touch screen after calibration x-axis works perfectly. But y axis is reversed. When I move upwards the cursor goes downwards and vice versa. Is it related to qt , tslib or the driver? what should I do?
e8johan
6th September 2011, 07:26
Simply recalibrate your screen using ts_calibrate or the calibration example that came with Qt and you should be ok.
The axis is inverted in tslib, but tslib (usually) relies on a linear mapping between the physical touch screen readings and the pixel coordinates. In this transformation, it can invert the axis.
gosk
6th September 2011, 16:19
Hi e8johan,
But I already calibrated several times. But the problem doesn't resolve. I can't understand the linear mapping you are telling. Any way my ts.conf contains followings.
module raw_input
module variance delta=30
module dejitter delta=100
Thankx.
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