MotionEvent with large touch area doesnt work - Eee Pad Transformer General

I am trying to implement an app on an Asus Transformer that would require being able to tell when the user is touching the screen with a larger than normal amount of surface area (think the side of your hand as if you were wiping the fog off of a window). I am finding that when I use a larger area than about two fingers width, I get absolutely no MotionEvents whatsoever. This problem doesnt seem to exist on the xoom.
Could this be something Asus built into the touch driver? Does anyone know how I might get ahold of Asus to find out?

It registeres points not surfaces, though it can register 10 points at once..

I'm not sure I understand your comment... The Xoom tablet registers any size point, including the size of your palm. This seems like the correct behavior. Developers should be able to do whatever they need with the touch event. The transformer is not sending touch events up through the system if they are beyond a certain size.

Related

Screen Accuracy Problems

The touchscreen on my titan is acting very problematically, with the screen slowly getting more and more inaccurate to touchscreen inputs, it's getting to the point where i have to use align screen 3+ times per day, and it's incredibly upsetting, is there any fix for this, or is it a hardware problem?
I'm not sure what it is but I too had that problem. After I flashed to DCD's 3.0.1 ROM,, the screen seems to be more stable. I still have to align screen every now and then. Do you you use your finger instead of the stylus? Sounds weird but I do that a lot and that might contribute to the problem.
Yeah, I do use my fingers on the screen a bit, with PointUI's Home, I don't see how that could cause it though o.o.
My I760 did that on two different phones. So i just got the xv6800, no problems yet except the ****ty video drivers-Or lack there of.
Okay, at this point the screen is going nuts, I'm probably going to have to send it off to sprint for a replacement at this point, as within 20 seconds of aligning the screen it's off by a good 5mm, and that number keeps rising.
Is you screen dirty? Along with using my fingers, my screen was dirty also. I just used a dry towel and clean the screen by blowing hot breath on it. Also, I bought new screen protectors. Yes it does seem odd that using my stylus and having a clean screen helped with my problem. Maybe my new ROM fixed the problem, I don't know. But its not as bad as it was before. Good luck.
Yeah, my problem was getting exponentially worse, off by about 6mm or so every time I'd align the screen, so I just returned it on my insurance plan.
Stylus vs Finger
If you are aligning your screen using the stylus and then using your finger for gestures and such the screen response is not aligned. You have to align with your finger in order to get a more accurate response because your finger covers so much more area than that tiny stylus tip.
I would alternate back and forth between the two, but to give an example of how severe the problem was getting, I would align the screen (with stylus) launch a program, and -already- the screen would respond about 4-5 millimeters down and 2-3 millimeters to the right of the stylus, which would make various tasks nigh-impossible.
I had the same issue and notice that it was mainly due to the fact that my screen was dirty as mentioned before. Sometimes you may even notice that your screen may not be dirty but remember that oils from our fingers and especially our ears when we talk can cause the alignment issues. Perhaps you can even change the screen protector and see if this helps. This should fix all of your issues assuming it is not an actual software problem. The one time that I did find the alignment to be a software issue, all I had to do to fix it was to callibrate the screen in both standard and panoramic view. I hope this helps...
Nah, it wasn't that, I tried cleaning off the screen with a microfiber cleaning cloth and everything, even removed the screen protector to see if that was causing it, it was a hardware defect.
Well I can say this.. I used to work for Sprint, Nextell, Verison, and ATT at various points. I know that with more of them, they usually send you out another device and you send your back. The think I love about ATT is that they will do this with a No Questions Asked policy except for the standard one involving abuse, water damage ect. After 3 defective devices, they will automatically upgrade you to another device.... Please make sure that the reasons are lagitimate so that this policy does not change but if you need to go through the hoops to get a better device that works.... Have at it. Do not take it to a store unless directed by the telephone people. Many people feel like they are techs because they own a ppc of some sort but they are not the ones that make the ultimate call. Let the corperate people make the decisions. Once you receive your device, immediately stress test it with all of the things that you will be doing with your device. Load and unload software, ect to make sure it works. If ther eis an issue, it ie better to notify them within the first 72 hours. I hope this helps again.

A500 (or any droid tablet) as input/output device on PC

First of all, think of the ramifications for artists. Obviously there are tons of drawing apps out there, but imagine being able to use your 10" tablet as a drawing device. Obviously most tablets are not pressure sensitive, but, being able to use it as an input device would be sweeeeeeet.
Anyhow, point is, where would one begin to look into finding/making a driver to enable the A500 to be used as an input device (or output for that matter) on a windows PC?
Thoughts on the same subject line:
Use for drawing tablet
Output from pc to tablet to hdmi
throughput from pc to wireless nic for pc lacking/broken network card
Secondary display
external speakers (for pc's with broken/missing speakers)....
I don't think this or any of the capacitive touch tablets are very good for drawing. They are just not precise enough. Resistive touch is way better for drawing.
whatsitsnamenow said:
I don't think this or any of the capacitive touch tablets are very good for drawing. They are just not precise enough. Resistive touch is way better for drawing.
Click to expand...
Click to collapse
This. I have a Nokia N900 phone with resistive screen and, well, I can use almost anything to draw with it. Compared to A500 it's also very, very precise. On A500 I'd need to buy a specialized stylus that works on capacitative screens, and it'd still be imprecise due to the large block of rubber at the end.
While it may sound tempting to be able to use the A500 for such I'd still much rather recommend you to just buy a proper drawing canvas and be done with it.

Disabling touch, and Activating Pen Only mode at OS level

Hi everyone.
I've copied my post from Lenovo forum to show you that Pen Only mode at OS level is very necessary for people who write with their pen on Thinkpad .
and now, Since the root is achieved, I want to know that is there any chance for a developer to do such tweak ?
Post from Lenovo's Forum :
===========================================================
manuelcalavera wrote:
Hello Everyone, this is a proof that why we need a Pen Only mode for the whole system . yes, since our tablet has digitizer, there should be an option to work with the tablet with just our pen . An option to disable the touch layer entirely so we can write like a human being ! ( apart from hitting the bars and activate menus )
just download the video that shows everything :
http://www.mediafire.com/?snoh86t9drdiw8w
As you can see, writing is a hard thing to do without any cloth under my hand or gloves on .As I demonstrated, each time this problem occurs, It will be gone entirely by puting something under my palm . and it wont happen 99 percents when I write completely on a cloth.
To Development Team : Please fix this problem, Pen is the only advantage of your product .
pressing and holding one of the physical keys would be a nice choice for activate/deactivate it . so people who has not pen, could deal with it .
I've gathered some other post related to this matter :
manuelcalavera wrote:
I write all of my university courses in TPT and Ive been examining this issue every day. though this problem does not depend on the palm entirely , inking failure lowers to a really small percentage when you do not put your palm on the screen . for example I want to write PEN in a random coordinate of screen in a random part of random sentence . I stroke my pen down and move my hand to write the PEN down . it writes "P" and "N" very good but instead of "E", I can see nothing or in the best condition it writes only a dot --> "P. N" or "P N" Even though that IS a problem, It wouldnt if I could correct it. unfortunatley that certain area will be deactivate for a random amount of time . you can not write ANYTHING in that area during that time. not a single line . it will work nicely if you write a line from outside of that unspecific area into that area ! this shows theres no problem of inking in that position . and the funny thing is someother day this area had no problem and maybe tomorrow will be ok too even next page will be ok . imagin how hard it would be that random area, in a complex formula ! you will lose important amount of time to deal with tha mess. now palm thing comes in the story from this sequence; remember that unknown duration of time that you could not ink anything in that area ? well, if you put a cloth under your palm, it works so much better . Lenovo, too many people are losing trace of notes, too many disappointments just for this . how hard is it for your team to roll an update to add an option for turning the touch input off ? holding harware rotation key would be awesome choice
Rizzlomaniac wrote:
I have the same problem with my Thinkpad Tablet. It doesn't matter which app I use. I don't use any screen protector. As I have been enjoying the comfort of a stylus on a windows tablet before and was looking forward to move away from Microsoft with this tablet, I'm really disappointed to find, that the stylus I not usefull at all beeing that unresponsive. So please fix this issue as fast as possible or I will have to switch back to windows again!
juanayala85 wrote:
I was taking notes during a seminar last week and noticed that on the bundled Notes App, there were certain areas of the screen (middle left) where the pen just wouldnt respond at times. I would try a few times and then it would finally take the input, wondering if anyone else is having similar issues. I downloaded the WritePad application and it seems to be better there, also downladed Quill and saw that it was having similar issues so I'm wondering if its app related or hardware related. I'd love for the pen to start inking immediately as I start drawing, not start well after the stroke has begun.
Also note I have installed the Military Shield on the ThinkPad so not sure if this might have something to do with it also.
dgannon wrote:
I've seen the same thing (for me - a right hander - it normally shows up on the middle right side of the screen). To me it seems like the palm rejection in the note app is the problem.
I was able to get around this by placing a small cloth (the one I use for wiping the screen) under the heel of my hand while writing... since it is a capacitive screen, the cloth hides the palm and seems to make the pen behave better.
yahoowizard wrote:
I'm not sure if I have the same problem, but is it when you keep writing and suddenly, there are moments when nothing happens when you tap the pen, sometimes at a specific region? Over the past week or so, I've used the Writepad application for about 4 hours a day or so and what happens is, a while after writing, a region starts being a bit unresponsive. Either I keep tapping random buttons on the side or I try to make a stroke outside that region, then try to immediately write in the region I'm actually trying to write in. Locking the tablet, then unlocking it fixes the problem, but it's still annoying as it starts back up again in 10 minutes or some random time later.
===========================================================
I agree. I am an artist and the dual screen sensor does get in the way of my art. I can manage, but would highly appreciate if it were able to switch on and off the compacitive touch function on demand.
Sent from my ThinkPad Tablet using xda premium
Thread Moved To General​
I dont see any actual development here​
They announced that it will be built in in OTA3
It is on the Lenovo website - a post by bnsf

[Q] calibrate s pen? pointer and pen tip are off by 2mm

I just noticed the s pen tip and floating pointer on screen are always off by 2mm. This occurred on both my ATT and T-mobile note 3 so it is not an isolated case. Anyone else experienced this issue? What is your fix?
Sent from my SM-N900T using Tapatalk 4
Same problem here, no fix yet
onyxogen said:
Same problem here, no fix yet
Click to expand...
Click to collapse
Thank you for confirming this. I wonder why they don't have a digitizer calibration feature in setting like Windows?
From a technology point of view, due to the way the S Pen works, it should not require calibration
In laymen's terms, think of capacitive touchscreens, which do not require calibration, the first reason is because capacitive touch sensors always have auto calibration, the second reason is that your screen is divided into multiple rows and columns, so even if a measurement is wrong by 10%, that 10% over a small area is not really noticeable
With the old resistive touchscreen technology, calibration is required, because the screen is one gigantic resistor and 10% error in measurement means a error that is as big as 10% of your screen size. Also resistive touchscreens are constructed with two layers and these layers get bent, and wear out over time.
The S Pen technology is elecromagnetic, and it also sort of uses multiple rows and columns ("Under the tablet's surface (or LCD in the case of the Cintiq) is a printed circuit board with a grid of multiple send/receive coils and a magnetic reflector attached behind the grid array."), thus, it is similar to capacitive touchscreens in the sense that measurement errors are usually unnoticeable by the user.
Thus why nobody implemented calibration
If I were you, I'd exchange the phone for a new one if possible.
I have the feeling this is an issue with newer builds of touchwiz. On the note 8 once it was updated to 4.2.2 the pen was accuracy became offset. The only fix to it as of now is running a custom kernel that fixed the accuracy. Hopefully we get a similar fix soon from xda and of course an official fix from Samsung.
Sent from my GT-N5110 using Tapatalk 4
I think this is a design feature. If you change it to left handed operation the pointer will be 2mm off to the right instead of the left. I recall this being so you can see the dot instead of being obscured by your own hand and pen. This was the same on my Note 2.
This should only apply to the pointer though, not to an actual touch.
EDIT: THIS WAS SO ON MY NOTE 2, but upon checking it is not so on my NOTE 3. My pen dot lines up perfectly.
I know this is an old thread, but there are always new owners to an old device.
If you have an SGH-I467 (AT&T) version with 4.4.2, the right/left hand dominant switch is not available. The workaround would be turning your tablet upside down with the auto rotate enabled so that your app would be right side up again. What you achieve here is moving the pointer from under your nib, if you are right handed, to the other side where you can see it so that you know where to drop down your pen to start drawing.
>I know this is an old thread, but there are always new owners to an old device.
If you have an SGH-I467 (AT&T).
But this is not the forum for that model .

[Q] I've noticed a problem with palm rejection.

Hey guys, I just picked up my Tegra Note and I'm enjoying it, but in testing out the potential and limitations of the DirectStylus, I came across a problem and I want to find out if it's just my problem, or if it's reproducible with all Tegra Notes with the latest system updates.
Basically, I'm using the stylus, and stylus only mode is activated. This works pretty well and ignores most/all inputs from anything except the tip of the stylus.
However, I have noticed that if I slide my finger onto the screen from the outer edge/bevel, it will often (nearly 100% of the time) register this as a touch. For an example, if I tap the home button with my finger nothing happens, however if I drag my finger from just below the screen onto the home button, it will press. Likewise I cannot scroll through home screens by normally swiping my finger, but if I swipe from off screen on the left or right, it will register. Bringing down the notification area with a finger swipe, etc, all work as well when naturally this should only be possible with the stylus.
The main problem with this is when writing/drawing with my hand resting on the edge of the device. If my palm is entirely off the screen it is fine. If my palm is entirely on the screen then stylus only works, too. However, if in the process of writing my hand slides from the side onto the screen, suddenly the stylus looses focus and I'm drawing lines with my palm.
I hope I have explained this issue correctly, and I wondered if this was a known problem? If there are any solutions? Have I messed up and set an option somewhere I shouldn't have? Should I get it replaced? Sorry for all the questions! :laugh:
Oh and it's not rooted or anything. Just stock, updated to the latest system version through the system updates.
Thanks, hope you can help!
I get a similar issue at the bottom left of the screen sometimes. It only seems to effect the bottom left but in both orientations so that rules out a hardware issue. Doing a quick lock and unlock seems to fix it for me and it functions fine until next time I turn on stylus mode. Seems hit and miss with no real way to replicate it.
It didn't seem to do it before ota 2.3 so I predict a hotfix for the issue. Its a minor issue, the battery life on 4.4.2 isn't however, 4-5hrs with lite use is pretty rubbish. I suspect that's an issue with the power saving features (I think it's stuck on Max performance all the time).
Would be nice if they fix the SD write issue but Google dictate that I think.
Mine was certainly a lot worse than that - persistent on all four edges of the screen and there is no way to stop it. 60-80% of the time it was manageable, but consistently reproducible, other times it was far worse and could only manage dots and dashes when I tried to write anything while resting my palm on the screen. It also developed a 'blind spot' problem I've noticed reported on a couple of forums - a spot where the stlus simply refused to draw - so I grew more concerned that I had a problem with the actual hardware. So, I took it into the store I bought it from, and they're going to replace it for me.
Hopefully I won't have a problem with the replacement one, because I absolutely love the tablet!
I've had similar problems... just remember, all of the stylus functionality is governed by software; the screen on this is simply a regular capacitive screen that's also capable of detecting the size and shape of what's touching it, and the rest is calculated by software. It's a neat idea, but in practice it hasn't held up as well as Nvidia would've liked us to believe. Now that I've had a Galaxy Note 2 for a couple months, I have to say that the active stylus experience blows the TN7 away, but then again it's a much more expensive technology to implement. I almost always used a pencil with my TN7 while it was my day-to-day work buddy since I found the stylus to be too sticky and hard to write with... I also found several of the issues I was having weren't as bad while using a pencil, so maybe you could give that a try. Also, remember that if the screen is dirty that it will affect the stylus's performance as the screen is so sensitive that even a little moisture could register as a touch on the screen.
I received my replacement tablet today, and it is a lot better than the one I previously had. While the problem is still there, it is far, FAR better than before. Now it seems to be a minor nuisance, rather than a consistently reproducible problem. On top of that it has a much more vibrant screen - less yellow and washed out - and no 'dead zones' when trying to write with the stylus. So while I am certain software has an impact on performance, there must have been something weird going on inside the hardware of my previous device, too.
Considering the price, the fact that others have had similar issues, and how much I like about everything else - I'm very happy with my new TN7 now!
Have same problem .... When i swipe from left or right side of the screen it detects stylus nd do all the things.... Dont knw wat to do amazon is not replacing too the tablet..!
Same problem, I don't usually mind it other when I'm using an app like sketchbook pro, it becomes really annoying.
Sent from my Nexus 5 using XDA Premium 4 mobile app
http://forum.xda-developers.com/showthread.php?t=2787574
Sent from my Nexus 5 using Tapatalk

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