arrow-keys

问题 I am trying to override the volume buttons to act as Up/Down arrow keys (i.e. they should move focus around on all of my activities focus-able Views.) To do so I am overriding my activities dispatchKeyEvent() method note that I also tried onKeyDown() but some portion of my volume key events was still going thru to the system, my device has audible feedback when you change the volume. I could still hear the beep but the volume was not actually being changed. Switching to dispatchKeyEvent()

问题 I'm trying to set up a menu that can be navigated via the arrow keys. I have this working fin in Firefox. Trying to get it to work in IE8 and after a bit of struggle, found that it was because IE8 wouldn't register a keypress on the arrows. To test: $(document).keypress(function (eh){ alert(eh.keyCode); }; In Firefox, pressing any of the arrow keys would trigger an alert of 37, 38, 39 or 40. In IE8, nothing. Any other key on the standard QWERTY keyboard would register, but not the arrow keys.

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 Moving hands all the way down to the arrow keys can be boring... Is there a way to rebind the arrow keys to shortcuts, like in emacs ? Thank you! 回答1: Found it ! Tools -> Options -> Environment -> Keyboard The commands are Edit.LineUp, Edit.LineDown, Edit.CharLeft, Edit.CharRight. 回答2: I think (tools)(options)(macro)(keyboard) will get you to the screen where you can assign stuff to keys. (i don't have 2010 handy from here) 来源： https://stackoverflow.com/questions/5912974/rebinding-the-arrow

问题 I am following a tutorial [here][1] to make a Facebook like friend tagging system. But the tutorial lacks the "arrow navigating" capability like Facebook. I would like to figure out how to achieve this. Basically, when I input text on the contenteditable area, it will generate divs of suggested friends like the following: <div class="display_box"> <img src="user_img/John.jpg"> <a href="#" class="addname" title="John">John</a><br> <span>India</span> </div> <div class="display_box"> <img src=

问题 I'm making a game for my computer Science class and I am trying to move a character object that extends Bug with the arrow keys. Should I put the code to move with the arrow keys in the Character class or in the World class? And what should the code look like? Right now I've got this code in the Character class and it complies fine, but when I try to to run it in the grid nothing happens when I press the arrow keys. public class Character extends Bug { Random pokemon; public Character() { }

问题 I am having some issues with jQuery Autocomplete and moving DownArrow and UpArrow ? The problem seems to be that <input id="autocomplete-input" value=""> focus: function (event, ui) { $('#autocomplete-input').val(ui.item.label); } This works great for MOUSE focus - but when I use arrowUp and arrowDown - it selects the ui.item.id over and above the ui.item.label How can I fix this so that either: the input val isn't changed at all [i.e. it keeps the users inputted term] it updates the input

问题 How can I capture arrow keys in a terminal, without the user having to press "enter" after the arrow key? 回答1: Look into the Ruby console libraries ruby-termios and ncurses-ruby. 来源： https://stackoverflow.com/questions/3301777/how-can-i-capture-terminal-arrow-keys-in-ruby

问题 I was curious if there was a way to use the arrow keys on your keyboard to be able to receive input form them and use this information in a batch file? Thanks BurnE 回答1: There a few ways that you can assign arrows symbols/keys to variable, but u can't use them as input as they are operational buttons in command prompt (move cursor and iterate trough the already executed commands) and you cant's detect their pressing. EDIT: @echo off CHCP 1251 ::Define a Linefeed variable set LF=^ ::above 2

问题 I'm working on programming a Tetris game in Visual C# 2005. This is the most extensive program I have designed yet. I create a shape class and a block class to control the location, movement, and display of the different Tetris pieces. I have moveDown(), moveLeft(), and moveRight() functions for each shape (and corresponding canMoveDown(), canMoveLeft(), canMoveRight() boolean functions that verify it's ok to move). This is all working beautifully. I want to use the down, right, and left