keydown

Triggering a keydown event programmatically in vanilla Javascript

由 大城市里の小女人 提交于 2019-12-08 19:17:14
问题 I have an event attached to the window running on keydown . I would like to test this by having a routine (per interval) programmatically hitting a key on the keyboard. The following code doesn't work - but works fine if I'm actually pressing a key on the keyboard. I originally tried: var evt = document.createEvent("KeyboardEvent"); setInterval(function() { evt.initKeyEvent("keydown", true, true, window, false, false, false, false, 13, 13); }, 500); Here's my current keydown event: window

Handling more than one keypress and detecting keyup event

由 霸气de小男生 提交于 2019-12-08 19:07:28
I am making a simple game and I use the following code to detect cursor keys: protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { if (Connection == null || Connection.IsOpen == false) return true; Thread.Sleep(SleepTime); switch (keyData) { case Keys.Up: GoForward(); return true; case Keys.Right: GoRight(); return true; case Keys.Left: GoLeft(); return true; case Keys.Down: GoBackward(); return true; case Keys.Space: Beep(); return true; } return base.ProcessCmdKey(ref msg, keyData); } I also use this code to figure out if the user has released perviously presed key: private

Python keydown combinations (ctrl + key or shift + key)

由 こ雲淡風輕ζ 提交于 2019-12-08 16:24:34
问题 I have some python code with keydown events happening, I am basically wondering if it is possible to have two keys pressed at a time, like ctrl+a or something like that. Is this possible, or will I have to find a workaround? 回答1: Use pygame.key.get_mods() to get state of special keys like Control or Shift . get_mods() gives one integer and you have to use bitwise operators to compare it with constants like KMOD_SHIFT See documentation: pygame.key EDIT: example import pygame import pygame

Bind multiple keys to KeyDown event (Shift + * (Asterisk))

由 淺唱寂寞╮ 提交于 2019-12-08 09:12:18
问题 I am trying to bind multiple keys on a KeyDown event to change a bool variable, but I can't seem to figure out how to trigger the asterisk/star key (*) with the Left Shift key in the following code: protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { if (keyData == Keys.Multiply || keyData == (Keys.LShiftKey | Keys.OemQuotes)) { Valgt = true; } } 回答1: This answer will not be keyboard layout invariant but this would do the trick on a US-EN keyboard. It's not robust but can

keydown event is not working for input type search in jquery mobile

由 旧时模样 提交于 2019-12-08 07:53:18
问题 I want to invoke keydown event for input type search in jquery mobile. Below is my html code. <!DOCTYPE html> <html> <head> <meta charset="ISO-8859-1"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Insert title here</title> <link rel="stylesheet" href="jquery.mobile-1.2.0.min.css"> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> $(document).ready(function() { $("#search1").keydown(function() { alert("keydown"); $("#search1

Handling more than one keypress and detecting keyup event

由 时光毁灭记忆、已成空白 提交于 2019-12-08 05:02:37
问题 I am making a simple game and I use the following code to detect cursor keys: protected override bool ProcessCmdKey(ref Message msg, Keys keyData) { if (Connection == null || Connection.IsOpen == false) return true; Thread.Sleep(SleepTime); switch (keyData) { case Keys.Up: GoForward(); return true; case Keys.Right: GoRight(); return true; case Keys.Left: GoLeft(); return true; case Keys.Down: GoBackward(); return true; case Keys.Space: Beep(); return true; } return base.ProcessCmdKey(ref msg,

How can I determine in KeyDown that Shift + Tab was pressed

由 只谈情不闲聊 提交于 2019-12-08 01:56:36
问题 How can I determine in KeyDown that ⇧ + Tab was pressed. private void DateTimePicker_BirthDate_KeyDown(object sender, KeyEventArgs e) { if (e.KeyCode == Keys.Tab && e.Modifiers == Keys.Shift) { //do stuff } } can't work, because never both keys are pressed exactly in the same second. You always to at first the Shift and then the other one.. 回答1: It can't work, because never both keys are pressed exactly in the same second. You're right that your code doesn't work, but your reason is wrong.

How do I capture the backspace key in IE8 with jquery?

由 烂漫一生 提交于 2019-12-08 01:38:39
问题 I've got a simple javascript keydown event coded via jquery. The event should just alert the key that is "down." This works for most keys but not the backspace key in Internet Explorer. I read that IE messes this up on the keypress event but was supposed to work for the keydown and keyup events. Is there anything I can do via jquery to capture the backspace in IE? The version of IE I'm currently testing in is: 8.0.7600.16385 $('.AddressField').bind("keydown", function (e) { alert(e.keyCode);

Basic WinForm KeyDown event handling

由 我只是一个虾纸丫 提交于 2019-12-07 20:18:23
问题 I'm using WinForms. I've created an event handler for the KeyDown event of the main form, thereby invoking a button's Click event handler. The Click event handler called is dependent upon the specific key pressed. If a user clicks the button rather than using the key, and then subsequently tries to use the key thereafter, the key (down arrow for example) acts as a tab-cycle, changing focus between each button control on the form (rather than executing the Keydown handler). Any ideas ? 回答1:

keydown event is not working for input type search in jquery mobile

由 允我心安 提交于 2019-12-07 18:12:27
I want to invoke keydown event for input type search in jquery mobile. Below is my html code. <!DOCTYPE html> <html> <head> <meta charset="ISO-8859-1"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>Insert title here</title> <link rel="stylesheet" href="jquery.mobile-1.2.0.min.css"> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript"> $(document).ready(function() { $("#search1").keydown(function() { alert("keydown"); $("#search1").css("background-color", "yellow"); }); $("#search1").keyup(function() { alert("keyup"); $("#search1"
订阅 keydown