keydown

Get the char on Control.KeyDown?

会有一股神秘感。 提交于 2019-11-28 13:35:57
When handling Control.OnKeyPress event, there is a KeyPressEventArgs that contains a KeyChar . For usability reasons I need exactly the same KeyChar but when handling OnKeyDown event. The KeyEventArgs does not contains any char related data. I mean, if press the A key with or without Shift its not affecting the KeyCode , KeyData or KeyValue . The same when using another language, i still getting capital english values. How to get a KeyPressEventArgs.KeyChar inside KeyDown event? Thanks. Convert it. Here is simple function for converting 'A' to 'a'. It converts only capital chars from [A-Z] set

Using addKeyListener to bind keys Javascript

微笑、不失礼 提交于 2019-11-28 12:51:56
问题 I'm making a small game for a class and I am having trouble finding a way to bind keys to functions. One solution I found was using addEventListener, however I cannot find a way to take the key value and bind it to an animation. document.addEventListener("keydown", function(event){ if(event.which === 65) { $("#player").animate({left: '5px'}); } }); 回答1: var x = event.which || event.keyCode; // Use either which or keyCode, depending on browser support 回答2: Try to do it in jQuery way. jsfiddle

Detect CTRL and SHIFT key without keydown event?

本小妞迷上赌 提交于 2019-11-28 12:13:12
I've been wondering if I can detect CTRL and SHIFT key being pressed WITHOUT using keydown event. The reason is that I am creating some sort of Grid Viewer in JavaScript, and I implemented selecting different items by holding CTRL or SHIFT key as it functions in most common viewers, editors and so on. The problem is that when the focus is not anywhere on the page. For example I'm adding page to the bookmarks. Then I hold CTRL or SHIFT and click on the item, but it acts normally as keydown hasn't been triggered. Any way of omitting this? Perhaps not, but it can be confusing for customers who

How use the combobox keydown event without selecting the listed item

你离开我真会死。 提交于 2019-11-28 11:50:53
I have in my Excel VBA project, a combobox which uses a range of cells as it's list of items. I have used a filter in it, so that whenever a value is entered, the list shrinks down to the items containing the string, and dropdown list is shown. However, the problem appears, when the dropdown is shown, the navigation keys can't be used to scroll within the items. As soon as the down key is pressed the dropdown list will be filtered again. I guess its happening because the down key while focusing on the items, is also selecting it. Hence, the combobox_change event is called automatically. Is

Cross-browser way to get automatically repeating keydown events when key is held down

故事扮演 提交于 2019-11-28 11:36:24
Using Javascript / jQuery, how can I get automatically repeating keydown events, or equivalent, when someone holds down a key? What I actually want is to be able to check whether a key is down, but from other questions here it looks like that's not possible. The suggested workaround seems to be recording keydown and keyup events and then assuming the key is down if a keydown event has been recorded and no subsequent keyup. That solution runs into a problem in my case. I am designing an online experiment. The user is supposed to hold down the "T" key for the entire experiment, never letting it

keydown in c# doesn't work for some reason

隐身守侯 提交于 2019-11-28 08:49:12
问题 I'm trying to do a calculator and all I have to do is make it work with the keyboard. This should work but it doesn't. private void Form1_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.D1) { resultarea.Text = "fgdgd"; //number(1); } .... } Any idea what could have gone wrong? Edit: it's still not working. I figured I might aswell post the whole code. public partial class Form1 : Form { public Form1() { InitializeComponent(); KeyPreview = true; } double first = 0; double second

How to listen keyboard events on svg

余生长醉 提交于 2019-11-28 05:49:43
问题 I have a svg and I can draw multiple shapes on this svg. Now my requirement is I want to listen keyboard events like ctrl+C, ctrl+V, ctrl+D, Esc, Delete so that I can copy, paste , duplicate selected shape. But I have no idea about listening keyboard events on SVG . I tried following code but no luck !! mySVG.on("keydown", function () { //code to handle keydown }); Any help ? Thanks in advance. 回答1: Because SVG is not an input-type, listen for the event on the window instead: $(window).on(

Detecting “value” of input text field after a keydown event in the text field?

孤人 提交于 2019-11-28 05:26:48
So my site has an input box, which has a onkeydown event that merely alerts the value of the input box. Unfortunately the value of the input does not include the changes due to the key being pressed. For example for this input box: <input onkeydown="alert(this.value)" type="text" value="cow" /> The default value is "cow". When you press the key "s" in the input, you get an alert("cow") instead of an alert("cows"). How can I make it alert("cows") without using onkeyup ? I don't want to use onkeyup because it feels less responsive. One partial solution is to detect the key pressed and then

Is the shiftkey held down in JavaScript

◇◆丶佛笑我妖孽 提交于 2019-11-28 04:25:50
问题 I have written a JS function that only allow numbers to be entered. A copy of that function is below: function NumbersOnly(e) { var evt = e || window.event; if (evt) { var keyCode = evt.charCode || evt.keyCode; //Allow tab, backspace and numbers to be pressed, otherwise return false for everything. //(keyCode>=96 && keyCode<=105) are the numpad numbers if ((keyCode >= 48 && keyCode <= 57) || (keyCode >= 96 && keyCode <= 105) || keyCode === 9 || keyCode === 8) { } else { evt.returnValue =

KeyDown event - how to easily know if the key pressed is numeric?

孤者浪人 提交于 2019-11-28 03:13:26
问题 I am currently handling the KeyDown event of a DataGridView control. One of the columns is filled by calculated values and I want the user to be able to override the cell value if they want. When the user presses a numeric key, the cell goes into EditMode and allows the user to override the value. If the key is not numeric, nothing happens... That is working pretty well... the problem is that I find the code for it ugly... I can't seem to find a neat way to handle all the numeric keys in a