First, thank you for taking the time to read and help.
We have a third party barcode scanner on an android device. The device reads the barcode and sends the data back as keyboard input. I have been looking for a way to just capture all text input, but I haven't been able to find a global text input listener.
Does anyone know a way I can do this without forcing the user to click into the input box (ideally I would just capture and never present the input to the user), and then scanning the barcode?
Thank you!
What you want is to capture the raw keyboard events. It's the same as getting input from an external usb/bluetooth keyboard. You are correct that this won't work without a native module to capture those system-level events.
This react native library can do the trick:
https://github.com/kevinejohn/react-native-keyevent
Related
I use react-native with expo (both latest) and i try to use speech to text.
For the moment i have found two solutions:
react-native-voice, who need to eject the app but I do not want to.
Google api call, which is not free.
Both of these solutions are not ideal in my case.
The thing is that I can write in an input with the speech-to-text integrated into the native keyboard. But I would like to be able to trigger it at the press of a button, without having to open the keyboard and have to click on the microphone.
Is there a way to do this? In the react native keyboard doc they don't talk about this
Thanks
I am creating a system that when the user uses the barcode scanner, it will automatically fill into a specific field.
Example: The cursor is in the textfield4, when I click the barcode scanner, the input should be placed in textfield1.
Thanks in advance for the help.
I have downloaded the SDK but I'm having a compatibility issue. I am using symbol barcode scanner LS2208. The SDK Provided by motorola isn't working.
I tried catching the time of input when enter is pressed. 1st scan is good, after that it leaves out the 1st few characters behind.
Is it possible programatically change keyboard input anywhere , when the program is in tray?
Example.
When user type text in, say, Google Chrome then my program catch the key the user types, and change it to another symbol (in another language)?
A -> ❤
B -> 웃
C -> ✄
etc.
Is it possible? and if answer is YES, then how?
This sounds like a job for a custom keyboard layout.
After installing your keyboard layout, the user need only enable it in the “Language & Text” preference pane and then select it in the Input menu extra.
It's also possible to enable and select an input source (keyboard layouts being a kind of input source) programmatically.
You can do this a number of ways.
You could capture NSEvent key events and change them.
You could override keyDown: in your own view subclass.
And more.
Read up on the Cocoa Text System first
https://developer.apple.com/library/mac/documentation/TextFonts/Conceptual/CocoaTextArchitecture/Introduction/Introduction.html
You can use Quartz event taps to receive all key events first and modify them before allowing them to be processed (or substitute different events entirely). Note that the user will have to enable access by assistive devices in Universal Access preferences in order for event taps to see keyboard events.
You could create, install, and have the user select a custom keyboard layout. You can use the third-party Ukelele program to create and modify keyboard layouts. This doesn't involve code, necessarily. It's just a big state machine for translating key codes to characters.
You can probably accomplish something like this by implementing an input method, too. See the Input Method Kit.
i know my question seems very similar to others according to a buffer-clear issue... but here is a detailed description:
I have an motorolla handheld (bar-code scanner) which is reading barcodes over an tray tool.
The code is scanned by the traytool und is casted as an keystroke like a normal press on a key on a keyboard.
so i have an app in vb which should read a barcode and after that a second and than proceed the inputs.
after reading 12 chars/numbers my textfield should set the focus to an other textfield (2. barcode) so i check onChange the length and than set the focus to the next textfield.
if there is a malicous barcode or a barcode which contains more than 12 characters/numbers the second textfield will be filled with all chars after the 12. char from textfield 1.
i have no control over the scan behaviour or the keydown event of the scanner trigger... nothing possible.
also there is no termination symbol in the input data which signals me that one block is ending here.
so how is it possible to clear the buffer of the virtual keyboard of the scanner ?!
any suggestions?
I suggest downloading the manual for your scanner to find the configuration codes. They are typically a set of special barcodes that can be scanned to set properties such as allowed symbologies. What you will want to do is set the scanner so that it appends a CRLF, Tab, or other terminator for your data. That way you can act upon the end of the barcode.
You can use TWAIN to handle the scanning thought i am not sure whether it supports Motorola. Try to download some TWAIN libraries and in-cooperate them with your project.
Is there a way to detect screen capture or recording is processing.
Atleast a way to know the process behind screen capturing?
i guess something has to be done with Kernal side of the system but not sure.
Thanks in advance..
You could look at using something like Deviare. I haven't used it personally, but it does let you hook some of the win32 APIs including GDI32, which is probably what you would have to use.
You could capture a [print scrn] button press from the keyboard, but there are so many different ways to record video and capture screens, you couldn't possibly create a solution to scan all the different types of applications that can capture this information.