Hi!
First of all I recorded a video on the phenomenon, this might be more descriptive than my words: youtu.be/F_mpLNKH6S4
I have a project in which I have to use two displays: one that is the 7 inch touchscreen shipped with the Raspberry, and another one connected via HDMI.
The first display is used as a touch control-panel, the second one is used only for displaying some information.
The problem is the following: When using only the touchscreen, everything is fine, the pointer clicks exactly where my finger is. But when I attach and configure the secondary monitor, the virtual "canvas" grows to more than twice the size, and my touches on the touchscreen become highly shifted to the right.
So the touch area now wants to cover the entire virtual canvas, offsetting the pointer from the physical touch, and making it nearly impossible to precisely hit any button on the screen.
I would be glad to receive any help!
Related
touchscreens come in verious flavours
the ones our pda have with the coating
wacomm active digitizers which only respond to the pen mostly used on tablet pc's in the high price range
hp have a sensor detect system for their kitcten pc which also seem to work fine and support multitouch like iphone
read about a new tech where the screen itself is a sort of webcam so it can detect touch's and respond to them in kind
said the screen itself could even be used as a scanner
wonder what tech will show it's face in the htc phones to come ...
p.s. wacomm is good for drawing fake rembrandts but poor if you like to click by using headbuts
I don't have the link for it, but I saw this clip on another PPC forum where describing a "two sided" touch screen.
Basically the idea is this: when you use your fingers on a touchscreen you obscure part of the data. So they use a camera on the back of the device plus movement recognition software to see where your fingers are (if you were holding your PPC like a game controller with only thumbs in front of it) and project a shadow of your fingers on the screen.
As if the screen was "see-through".
I tricked my friend into thinking that the mousepad on my laptop was also a scale. Would be pretty cool if the screen on a ppc could weigh small measurements. That way I'd never get chinced again when picking up herb
I heard from a friend that someone is building a phone where the touchscreen keypad is almost as easy to feel as a physical hard-button keypad.
The virtual buttons (0-9, *, #) are spread out in a typical rectangular grid over the whole screen, with large gaps between them. When you (lightly) move your finger across the screen, it vibrates as your finger is passing over any button. If you want to actually press the button, you have to push your finger against the screen harder (this event is acknowledged with a beep).
This sounds like a great interface. Has anyone seen/heard of it? It also seems relatively easy to implement on any PocketPC, unless there are some problems that I'm not aware of.
I'm using one application that uses vibration as a feedback -- Phone_Pad_Vibrate.cab. However, it vibrates only when you actually press a button. I think it's a great app, but obviously its purpose is very different from what I'm talking about (e.g., it won't help you find the right button if you just shift your finger around the screen). Also, I found that it's not reliable -- if I use fast, light touches, I can dial a whole number without any vibration. It may be due to the lag between the button press and the vibration, or due to the different pressure threshold used by this program and the actual phone dialer. If it's the lag, I wonder if it's a technical limitation of the Kaiser.
The screen on the Kaiser (and most other PocketPCs) isn't pressure sensitive, that is, it can tell when you are pressing, but not how hard. You would need a special screen to achieve that.
You are talking about screen technology more advanced than most PocketPCs are currently equipped with. the iPhone has what is generally regarded as the most advanced touch screen in a mass produced product. The software would need to implement it, but the screen's hardware would need to be able to do it in the first place.
I am using a Samsung TabPro S and I cannot navigate within RemixOS because the mapping of my touchscreen input to the curser within Remix is totally wrong. The mouse pointer is always some few cm away from the point where I touch the screen.
Impossible to correctly navigate.
I could use the trackpad though, but I don't want to.
I'm having the same problem...
I'm on a surface pro 4 and if I try to change orientation the screen gets confused.
Same problem on a Windows 10 Asus N550LF Touchscreen Notebook, i.e. mouse cursor basically stays where it was when I touch the screen, and just clicks. I can only use the trackpad, but then, what's the point of having the touchscreen to run android apps?
Also, when I tap and hold, mouse cursor goes into select mode or drag and drop, but with no accuracy on mapping position.
Also, trackpad scrolling (with two fingers) is jumpy, inaccurate.
jide is jeremy, ben and david: "and we're here to take it to the next level"
boys,
just try to focus on the basics first, get it done, then talk about the "next level"
same here on surface pro 4. I tried everything without success.
Hi all,
I have a problem with my phone. When I put it on a material that has good electrical insulating properties, for example on a couch and try to use two or more fingers, e.g. zooming in - zooming out on a picture, the touch sensing of the screen blocks and becomes not responsive. One finger is always sensed but 2 or more fingers are sensed only for a short time or not at all. The more fingers you put on the screen the easier is to make it stop sensing your fingers.
This behaviour is more obvious when you repeatedly move your fingers inward till they touch and outward again.
When multi touch sensing blocks, one way to make it work again is to touch with one finger of your other hand the hull of the phone, e.g. the charging socket of the phone, making in this way a kind of grounding.
For visual demonstration you can use a multi touch sensing app, such as MultiTouch or other similar one.
The problem never occurs when:
- phone is handheld
- it is charging
- it is lying upon a not so good insulator, e.g. on a wood or a whasing machine.
I have made some videos that illustrate the problem:
vimeo.com/300242218
vimeo.com/300242398
vimeo.com/300242502
The strange thing is that I sent my phone to Nokia for repair and they exchanged my phone with a new one which however exhibits the same problematic behavior. This led me to think that many of Nokia 7 plus may suffer from this problem.
Could anyone else please confirm that he/she has the same problem with their phone or not?
A while ago I noticed that the calculator app I had loaded didn't recognise my touch presses on the lower numbers on the display.
Wasn't particularly bothered about this at the time and forgot about it, but today needed to use the numerical keypad for the phone app and the bottom row wasn't responding to finger touches, and I needed the 0 and #
To get around this I put the watch on the charger, that rotates the display, and using the watch while still on the charger, the numerical keypad works fine, the touches required are on a different area of the display.
The touches on the display work fine for other apps in the same area of the screen, which would indicate the screen touch sensitivity is okay....?