keydown

问题 I am writing a C# WinForms application, .NET 4.0. I have a WinForms Control on a Form . After user starts typing something using keyboard, another Control appears. That Control is some kind of text input. I'd like to send user input to that Control . Of course, after it gets focused, it receives all user keyboard input. But as user starts typing before Control appears, I have to pass first KeyDown event to that control after I call it's Show and Focus methods. SendKeys.Send method is a way of

问题 I am writing a C# WinForms application, .NET 4.0. I have a WinForms Control on a Form . After user starts typing something using keyboard, another Control appears. That Control is some kind of text input. I'd like to send user input to that Control . Of course, after it gets focused, it receives all user keyboard input. But as user starts typing before Control appears, I have to pass first KeyDown event to that control after I call it's Show and Focus methods. SendKeys.Send method is a way of

问题 I'm making a little Mario for my school's Computer Club. (well, as part of a team.) Anyway, I'm having some trouble with the "keyup/keydown" commands. Here's my code: # 1 - Import library import pygame from pygame.locals import * # 2 - Initialize the game pygame.init() width, height = 1280, 1000 screen=pygame.display.set_mode((width, height)) keys = [False, False, False, False] playerpos=[100,100] # 3 - Load images player = pygame.image.load("images/totallynotgodzilla.png") # 3.1 - Load Audio

问题 I'm building a terminal emulation and running into an issue with capturing backspace in Firefox. I'm able to nab the first backspace and remove the last character on the input at the prompt, but it won't persist and remove more than one character. Actual website: http://term.qt.io/ Replication here: http://jsfiddle.net/BgtsE/1/ JavaScript code function handleKeys(e){ var evt = e || window.event; var key = evt.charCode || evt.keyCode; if(evt.type == "keydown") { curr_key = key; if(key == 8) {

问题 I'm building a terminal emulation and running into an issue with capturing backspace in Firefox. I'm able to nab the first backspace and remove the last character on the input at the prompt, but it won't persist and remove more than one character. Actual website: http://term.qt.io/ Replication here: http://jsfiddle.net/BgtsE/1/ JavaScript code function handleKeys(e){ var evt = e || window.event; var key = evt.charCode || evt.keyCode; if(evt.type == "keydown") { curr_key = key; if(key == 8) {

问题 I have a form with several controls. I want to run a specific sub on keydown event regardless any controls event. I mean if user press Ctrl+S anywhere on form it execute a subroutine. 回答1: You should set the KeyPreview property on the form to True and handle the keydown event there When this property is set to true, the form will receive all KeyPress, KeyDown, and KeyUp events. After the form's event handlers have completed processing the keystroke, the keystroke is then assigned to the

问题 I have a form with several controls. I want to run a specific sub on keydown event regardless any controls event. I mean if user press Ctrl+S anywhere on form it execute a subroutine. 回答1: You should set the KeyPreview property on the form to True and handle the keydown event there When this property is set to true, the form will receive all KeyPress, KeyDown, and KeyUp events. After the form's event handlers have completed processing the keystroke, the keystroke is then assigned to the

问题 I have a form with several controls. I want to run a specific sub on keydown event regardless any controls event. I mean if user press Ctrl+S anywhere on form it execute a subroutine. 回答1: You should set the KeyPreview property on the form to True and handle the keydown event there When this property is set to true, the form will receive all KeyPress, KeyDown, and KeyUp events. After the form's event handlers have completed processing the keystroke, the keystroke is then assigned to the

问题 I am using a keydown event to detect keys pressed and have several key combinations for various operations. if (e.KeyCode == Keys.C && e.Modifiers == Keys.Control && e.Modifiers == Keys.Shift) { //Do work } else if (e.KeyCode == Keys.V && e.Modifiers == Keys.Control) { //Paste } For some reason the key combination in which I hit Ctrl + Shift + C is not working. I have re ordered them, and placed it at the top thinking it might be interference from the Ctrl + C , and even removed the Ctrl + C

问题 I would like to call this java function in another function. How can I manualy fire a KeyEvent? private void chooseItemByKey(KeyEvent event) I tried chooseItemByKey(new KeyEvent(null, null, null, null, null, KeyCode.DOWN, false, false, false, false)); to fire a KeyCode "Down" but my JRE told me there's a Exception in thread "JavaFX Application Thread" java.lang.IllegalArgumentException: argument type mismatch The method needs the KeyEvent because I trigger it also by a key, but I need to