keyboard-events

I am creating an app similar to the iPad's iMessage app that does messaging. So there is an input view anchored at the bottom of the message view and input accessory view when the keyboard is shown. Also the message view must be resized properly when the keyboard is shown while docked or undocked. The problem I have is that the notification data that comes in from UIKeyboardWillChangeFrameNotification is not consistent. First, there are 3 ways that the user can undock the keyboard: Press-and-hold the lower right key, then slide up Press-and-hold the lower right key, when the menu pops up,

MDN states that KeyboardEvent.which is deprecated. How can I substitute it for a non-deprecated version? For example, I have the following: window.onkeydown = (event) => { console.log(event.which); } I thought event.key.charCodeAt() could substitute event.which , but this won't work for keys such as ALT , CTRL or ENTER , and it only works if event.key.length === 1 : window.onkeydown = (event) => { console.log(event.key.charCodeAt()); } To recap, event.which != event.code and event.which != event.key , therefore I am unable to simply use event.key . Is there a substitute for event.which which

At the beginning I wanted to monitor changes to a <input type="text"> in real time (for example, exactly when the user presses a key). The onChange event did not work because it is triggered only when the user presses Enter or removes focus from the input element. Then I saw this question on StackOverflow. I tried the code from that answer but the problem is that I do not want to be notified for key presses that do not represent printable characters, so I had to modify it in this way to make it verify that there are printable characters in the events: ... textInputElement.onKeyDown.listen(

What's the easiest way to find the keycode for a specific key press? Are there any good online tools that just capture any key event and show the code? I want to try and find the key codes for special keys on a mobile device with a web browser, so an online tool would be great. Bertrand Marron $(function () { $(document).keyup(function (e) { console.log(e.keyCode); }); }); <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> Here's your online tool. Ahmet Kakıcı Just googled and result function displayunicode(e) { var unicode = e.keyCode ? e.keyCode : e

I've got a RFID USB device that registers as a HID device (A USB Keyboard more or less). I'm looking for a way to capture this input, and block/filter it before it hits the normal keyboard event handler (and outputs the 10 digit RFID code to the console). I would of course have to exclusively capture just this device, and leave the real keyboard input alone (or pass it along). My initial idea was to block the device in UDEV (So the usbhid/event/kbd kernel module didn't bind to it) and write my own basic driver for this device - but I don't know where to begin, or if that'll even work. What

What I am trying to do So, I have been trying to access keyboard input in Linux. Specifically, I need to be able to access modifier key presses without other keys being pressed. Furthermore, I want to be able to do this without an X system running. So, in short, my requirements are these: Works on Linux Does not need X11 Can retrieve modifier key press without any other keys being pressed This includes the following keys: Shift Control Alt All I need is a simple 0 = not pressed , 1 = currently pressed to let me know if the key is being held down when the keyboard is checked My computer setup