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Old 08-12-2016, 16:24   #1
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OpenCPN on Raspberry Pi w/touchscreen not working

HI have installed and am using OpenCPN 4.4 on my RPI 3 with the Pi-standard 7" touchscreen HDMI monitor. Touch works well for scroll and pan, most drop down menus, but will not work with the menu bar. None of these menu items seems selectable, even though all other functions operate as expected. Any ideas?
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Old 09-12-2016, 00:58   #2
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Re: OpenCPN on Raspberry Pi w/touchscreen not working

Does a bluetooth or USB keyboard work?
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Old 09-12-2016, 01:24   #3
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Re: OpenCPN on Raspberry Pi w/touchscreen not working

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Originally Posted by drewc228 View Post
HI have installed and am using OpenCPN 4.4 on my RPI 3 with the Pi-standard 7" touchscreen HDMI monitor. Touch works well for scroll and pan, most drop down menus, but will not work with the menu bar. None of these menu items seems selectable, even though all other functions operate as expected. Any ideas?
I have installed other touchscreens with the same problem. It was the orientation of your finger. I had to install the touchscreen calibration software.

With the calibration you get 4 crosses at your screen and you have to touch each cross.

You can do it each time you start the system. Or add the settings to a config.

With scroll and pan the orientation is not important. But with a menu bar you have to touch the right spot.

I have not used a Pi with the standard screen.
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Old 23-03-2017, 22:39   #4
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Re: OpenCPN on Raspberry Pi w/touchscreen not working

I am also experiencing the issue with the RPi and OpenCPN buttons with the 7" touchscreen. It seems to be common in other forums. I have tried one suggested fix to install the 'twofinger' workaround to no avail.
Do we have any feedback from the developer?

I'm running a RPi 3 with a fresh install of Raspian (with Pixel). I'm only using this for opencpn, so I'll run any version of that works....

Brad.
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Old 24-03-2017, 06:45   #5
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Re: OpenCPN on Raspberry Pi w/touchscreen not working

Brad....

1. Please send me a link to information on the touch screen you are using.

2. And just to be sure we are talking about the same thing: Do you mean the "menu bar" or the "tool bar" is unresponsive? Which one? Both?

Thanks
Dave
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Old 24-03-2017, 08:26   #6
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Re: OpenCPN on Raspberry Pi w/touchscreen not working

Dave,

Thanks for the response and great questions.

1. I am using what's often dubbed the 'offical' 7" screen. here is a link to the manufacturer:
https://www.element14.com/community/...screen-display.
2. Sorry for the confusion on the bar. I am using the tool bar. And to be specific, trying to hit the configuration buttons (wrench) etc. minimizing, closing etc. all work as normal, and the touchscreen works for normal rpi menu navigation.

As an aside, there is a fair amount on other forums for this issue. The link below acutally has a video demonstration:
No touch on official 7" Touchdisplay

There are also several threads on this forum which overlap with this topic. Just search on touchscreen and they all seem to circulate around the same issue.

Thanks in advance for the assistance.

Brad
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Old 24-03-2017, 16:07   #7
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Re: OpenCPN on Raspberry Pi w/touchscreen not working

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Originally Posted by bradfordharley View Post
I am also experiencing the issue with the RPi and OpenCPN buttons with the 7" touchscreen. It seems to be common in other forums. I have tried one suggested fix to install the 'twofinger' workaround to no avail.
Do we have any feedback from the developer?
I see the same thing with OCPN version 4.4 and now 4.6

RPi V3 updated and upgraded with apt-get.

Touch interface on or off doesn't make any difference.

Tapping on the icons in the toolbar does cause some of them to highlight green but that is the only effect that I can see.

All other apps seem fine. I read somewhere else that it is an X windows bug

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Old 28-03-2017, 16:39   #8
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Re: OpenCPN on Raspberry Pi w/touchscreen not working

Folks...

I obtained a rPI 7" official display, and verified the error.

The error is cause, I believe, by a fault in the touchscreen driver interface to wxWidgets. And that ultimately comes from the X input driver stack. But in any case, a workaround was devised, and test code is working fine now.

This fix will appear in OpenCPN Release 4.6.1, due out in a few days.

Thanks for your patience.
Dave
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