keypress

问题 how to detect a keyboard event in C without prompting the user in linux? That is the program running should terminate by pressing any key. can anyone please help with this? 回答1: You have to modify terminal settings using termios. See Stevens & Rago 2nd Ed 'Advanced Programming in the UNIX Environment' it explains why tcsetattr() can return successfuly without having set all terminal characteristcs, and why you see what looks to be redundant calls to tcsetattr(). This is ANSI C in UNIX:

问题 I have created a simple code to handle keypress event: var counter = 0; $('input').on('keypress', function () { $('div').text('key pressed ' + ++counter); }); JSFiddle. But keypress event handler is not raised on mobile browser (Android 4+, WindowsPhone 7.5+). What could be the issue? 回答1: Try keyup will help you var counter = 0; $('input').on('keyup', function () { $('div').text('key up ' + ++counter); }); 回答2: I believe keypress is deprecated now. You can check in the Dom Level 3 Spec.

问题 On my form I have an edit control. I have set up a KeyDown event to detect when the user pushes enter , but I also want to detect shift+space so the user can clear the contents of the box. The functionality works - I can detect the keypress. Problem is that the space does not get absorbed and so the space glyph is still typed in the control. How can I absorb the keypress when I push shift+space ? Private Sub FindBox_KeyDown(KeyCode As Integer, Shift As Integer) Select Case KeyCode Case

问题 I am having a problem on what to use and what to code if I want my combo box be generated once the user type a key... like: once i pressed letter "A" from keyboard inside the combo box, all items starting from letter "A" will show up from the drop down list. How can I code this when: items from the combo box came from my database and it's default value is the first item stored on my database. Actually I don't have any idea how to code it. All I have was a template from JFrame. Items from

问题 First off -- thanks for this group! I started delving into PyQt a month or so ago. In that time, I've bumped up against many questions, and virtually always found an answer here. Until now. I have a workaround for this, but I think it's a kluge and there probably is a proper way. I'd like to understand better what's going on. Here's the code: from PyQt5.QtCore import * from PyQt5.QtGui import * from PyQt5.QtWidgets import * class FormWidget(QWidget): def __init__(self, parent): super

问题 I'm using ExtJS 4.1 MVC and I need to perform some actions after user click Enter button. I did it this way: Ext.getDoc().on('keypress', function(event, target) { me._enterKeyHandler(event, target, me); }); But I wonder if somehow I can use Ext.util.KeyMap in Container. In Sencha docs I found something and tried, but it didn't work for me. var map = new Ext.util.KeyMap({ // in target I tried: Ext.getCmp('myComponent'), "myComponent", myComponentVar target: "my-element", key: Ext.EventObject

问题 In my code I make an object (A man sprite) move 1 pixel every time an arrow key is pressed. When you hold down the arrow key, the man is very very slow. I tried increasing the amount each time the key is pressed but that is not smooth enough. Can somebody tell me how I can make him move one pixel each time but move one pixel every 100 milliseconds? Thanks I appreciate the help. function moveLeft() { var newLeft = left - 1; left = newLeft; myElement.style.left = newLeft + 'px'; } function

问题 I tried to modify a piece of jquery used to open a div in a popup window for a recipe website i am working on I was able to modify it to suit my needs but ran into a snag when trying to allow close on keypress the code i have as of now allows me to close only the first popup window on keypress and when I try to do the same on the other popups it only fades the background out and leaves the popup window floating over the content container. here is the code: Jquery: //SETTING UP OUR POPUP //0

问题 I'm trying to create a "player" - black square - which moves when you hold down WASD. I tried looking around here, on google and on youtube on how to make this work, but every solution I've tried has the same problem: instead of moving it while I hold down the key, I have to tap the key constantly to make it move in small bits. I've no clue what I'm doing wrong. Here's the code (using python 3.3 - pygame 1.9): import pygame from pygame.locals import * from pygame.time import * import sys

问题 I have an <input type = "text"> binded with a "keypress" event, as follows (see jsfiddle here: http://jsfiddle.net/periklis/RMyc7/): <form name = "myform" method = "post"> <input type = "text" name = "mytext" id = "text_id"/> <input type = "submit"/> </form> <script> $(document).ready(function() { $('#text_id').bind('keyup', function() { console.log('pressed!'); }); }); </script>​ My problem is that if I select one of the browser recommendations for the field (previously entered values), then