keyboard-events

问题 I am sending keyboard key press and key release events, which works for all keyboard keys. But modifier keys works only when the key associated with modifier key is sent from application, and not from real hardware. That is if I send Shift and 'a' from application, it prints 'A' (capital A, which is what is expected). But if I send 'shift' key down event from application, and enter 'a' from physical keyboard, it prints 'a' (the shift key doesn't seem to be working across different devices).

问题 I'm building a virtual keyboard in jQuery, using keycode events to tigger an append, but keycode combinations are throwing me for a loop. Here's an example: I want to append a questionmark only when both the SHIFT key (keycode 16) and slash key (keycode 191) are pressed together. I thought the && operator would help, but this only appends the slash: $(document).keydown(function(e) { if (e.keyCode == 16 && e.keyCode == 188 ) { $('#mydiv').append('<span>?</span>'); } }); Any suggestions or idea

问题 I need to connect more than one keyboard/mouse with a single computer. Manymouse library can identify different mouses, but is there a library which can identify different keyboards? I mean, when I press Key "E", the program can tell me which keyboard the KeyPress event is from. With C#, the SDGToolkit can do it, is there something in the Java world or C world, which supports all OS just as Manymouse does? I am more interested in Mac and Linux solution. 回答1: Know the solution. I can use a hid

问题 Ok, so I am trying to write a program that will track my keystrokes while playing a game so that I can analyze the data later to help me improve my game. What I have been trying to do was implement a Global Hotkey Hook using user32.dll's RegisterHotKey. but this captures the keystroke completely, and the game no longer receives the keystroke. I don't know where to go from here and any pointers would be much appreciated. Here is some additional info: I am using C# .NET 4 Using Visual Studio

问题 Steps to reproduce in VS Express 12: Create a new Windows Forms Application project Add a button Set the Form KeyPreview to true Add a keyDown event to the form The event will not trigger as long as the button is present on the form I have a project where I want to catch both keydown and keyup events, however, I can only seem to get the keyup event to work. I have a form with a single panel, button and label on it. In the form the keyPreview property is set to true, and is linked to both the

问题 My app changes its state when a person holds modifier keys (Shift, Alt, Ctrl). I track modifier keys using keydown/keyup events: var altPressed; window.onkeydown = window.onkeyup = function(e) { altPressed = e.altKey; } Keyboard events don’t trigger outside of the browser tab. Now, imagine the following scenario: Hold Shift key Click on a link to my app, it will open in a new window Release Shift key keyup event won’t fire on my page when it isn’t focused so my app will show when I focus on

问题 This question is a possible duplicate of this and this thread. But since none of them have provided a clear solution for my problem, I'm asking it again. My required task is to connect 2 Keyboards via USB and then manage the inputs of each Keyboard separately through a Java Application. This requirement has been answered into some progress in the first thread I have mentioned above by @nan but his solution did not work accurately for me. You can find his blog post on his solution for this

问题 There seem to be a way for Keyboard.GetKeyStates to return wrongly pressed keys, i.e for instance for Keyboard.GetKeyStates(Key.NumPad2) to return Down, Toggled even if not pressed. I have been able to reproduce this on a very simple WPF app catching keyUp events. The way to reproduce the bug is the following: press NumPad2 press LShift release NumPad2 release LShift From then on, checking the state for NumPad2 will always yield Down, Toggled until you press and release it again. Not sure it

问题 The problem I'm having is that I'm trying to make my character move diagonally on screen when a user presses either the K_UP key and K_RIGHT key or the K_UP key and K_DOWN key, etc. Here is my code for character movement (event handling): 1. #Event Handling 2. for event in pygame.event.get(): 3. if event.type == pygame.QUIT: 4. sys.exit() 5. elif (event.type == KEYDOWN): 6. if ((event.key == K_ESCAPE) 7. or (event.key == K_q)): 8. sys.exit() 9. if (event.key == K_UP): 10. self.char_y = self

问题 I am using the direct following and I do not detect the copy and paste with the keys inside the input, would someone know how? Thank you! export class OnlyNumberDirective { // Allow decimal numbers. The \, is only allowed once to occur private regex: RegExp = new RegExp(/[0-9]+(\,[0-9]{0,1}){0,1}$/g); // Allow key codes for special events. Reflect : // Backspace, tab, end, home private specialKeys: Array<string> = [ 'Backspace', 'Tab', 'End', 'Home', 'Delete', 'Del', 'Ctrl', 'ArrowLeft',