arrow-keys

问题 I have successfully implemented the scrollTo jQuery plugin which scrolls to the next div with the class "new" when a link is clicked. However, I would also like to be able to use the arrow keys to scroll up and down to the next/previous divs of the same class. I have looked all over the internet but have been unable to find out how to do this. I am very new to JS so very simple instructions would be appreciated! Here is the relevant code: <script type="text/javascript"> jQuery(function($){ $(

问题 I want to make links and input elements on my page have foucs that is navigable by arrowkeys. This is easy if I just think about up/down arrow keys, which are the same pattern as tab/shift+tab. Just find the next element and focus it. Can anyone suggest a neat way to handle the case where the user wants to left/right across the the closest element? 回答1: I think the best method is to define a custom, arrow_nav ordering index, something along these lines: screen.addInput({ name:'height', arrow

问题 I recently added some predictive text input fields to the web-app I am supporting. Big deal, right? Not really, seems like if your web-app doesn't do this -- you are already behind the times and your end-users are complaining. (At least that's how it is over here). So, my question has to do with the "up" arrow key. The predictive textbox has a onkeyup listener. The handler segregates the key strokes and does something depending on the character the user entered. The up arrow key allows the

问题 I'm independently developing keyboard support for openerp (an open source erp solution) and so far the job is done. But there's one last part that I can't solve no matter, no how. The challenge is to create navigation through arrows and highlight the object you're currently in. Here's the structure of the xml for better understanding, I want to make sure the user knows which product the focus is on. <t t-name="ScaleScreenWidget"> "<div class="scale-screen screen"> > <header><h2>Product

问题 I'm working on making a simple space game where a ship moves left and right to dodge asteroids. I learned to move my ship left and right from this video. But the movement is pretty blocky. How do I move the ship smoothly? Here is all my code: // JavaScript Document ////// Variables ////// var canvas = {width:300, height:300 }; var score = 0; var player = { x:canvas.width/2, y:canvas.height-100, speed: 20 }; ////// Arrow keys ////// function move(e) { if(e.keyCode == 37) { player.x -= player

问题 This bug is known for years, yet is is still present in Java 1.7.0_25 version which I'm using on Windows 8. The following result are same regardless of wether i have numlock turned on or not: Robot bot = new Robot(); bot.keyPress(KeyEvent.VK_UP); //this in documentation is non-numpad up arrow key bot.keyRelease(KeyEvent.VK_UP); //pressed the numpad up arrow key //folowing line is line #43 bot.keyPress(KeyEvent.VK_KP_UP); //this in documentation is numpad up arrow key bot.keyRelease(KeyEvent

问题 I am trying to write a (currently very) simple PyQt application, and wanted to allow users to navigate using the arrow keys, rather than clicking buttons. I have the basics implemented, and in my main QWidget , I override keyPressEvent , and right now, all I ask is that it raise an alert ( QMessageBox.information(self, "Hey", "pressed:{}".format(event), QMessageBox.Ok) ). This works perfectly well for standard ASCII keys (such as letters and the Enter key), but it is completely ignoring when

问题 If I press and hold down either the UP or DOWN arrow key when focused on a DataGridView, the cursor (blue highlighted cell) doesn't move evenly down the rows, instead it jumps several rows at a time in batches. Sometimes it doesn't even seem to move at all until the key is finally released, then the cursor jumps directly to several rows ahead having presumably stored all the key presses. Here is a GIF image showing the behaviour when pressing and holding the DOWN arrow, then releasing it and

问题 I am trying to control google earth using the arrow keys, however, I want to do this with applescript. Essentially this code should work and I'll tell you what it actually does. tell application "System Events" delay 3 key down 124 #Value of key right delay 3 key up 124 end tell This code should wait for me to go to google earth, then it will hold the right arrow key for 3 seconds. However, it just hits 'a'. I saw some recommendations to do the following: key down (key code 124) This sort of

问题 How can I handle ArrowKeys and < (Greater Than) in a Javascript function? Which event and which code (charCode Or keyCode)? I am very confused how to do this. I have read this link very carefully, Events and keyCode+charCode, but I could not find any solution for my scenario. 回答1: Using event.keyCode is sufficient. You only need to browser compatibility issues with regard to obtaining the key event into account. Here's a basic kickoff example which captures arrow keys, copy'n'paste'n'run it: