keycode

I am attempting to parse keydown events from the numberpad with the following: $('#myDiv').keydown(function(e) { val = String.fromCharCode(e.which) }); The problem is that keypad 0-9 return keyCodes of 96-105 which, according to fromCharCode() are the lower case letters a-i . How do I get keydown events of the numberpad to resolve to the appropriate number? You don't: you use the keypress event. The keypress event is the only event that will give you reliable information about typed characters. Your existing code will work if you simply change keydown to keypress . The which value passed to

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have this broadcast receiver for ACTION_MEDIA_BUTTON which actually works for both Android 2.x and Android 4.1, but for some strange reason, on Android 2.x (only) , I get each even twice (for a single click on the pause button, of course): public class RemoteControlReceiver extends BroadcastReceiver { private static long prevEventTime = 0; @Override public void onReceive(Context ctx, Intent intent) { if (Intent.ACTION_MEDIA_BUTTON.equals(intent.getAction())) { KeyEvent event = (KeyEvent)intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { this.getWindow().getDecorView().setSystemUiVisibility(getSystemUiFlags()); super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); } private static int getSystemUiFlags() { return View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION | View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION; } } After first start After volume buttons

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: using jQuery here, however unable to prevent numbers from being typed into the input field http://codepen.io/leongaban/pen/owbjg Input jQuery function alphaOnly ( event ) { alert ( event ); var key ; if ( window . event ) { key = window . event . key ; } else if ( e ) { key = e . which ; } //var key = window.event.key || event.key; alert ( key . value ); return (( key >= 65 && key = 95 && key I've seen plenty of examples here on how to restrict to only Numbers, and I'm using the correct key codes for a-z and A-Z. Do you see what I

I have question about the KeyEventArgs 's KeyCode and KeyData and KeyValue . KeyCode and Keydata are Keys type, but I don't know what the difference between them is. For KeyValue , I don't know what it is -- it has an int type, does it return the char value of the pressed key? I don't have much experience with Key events; any explanation of how they function and how to use them would be greatly appreciated. KeyCode contains data for the key that produced the KeyUp or KeyDown event. KeyData contains the combination of that key together with CTRL, SHIFT or ALT if any of those were pressed.

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Just wondering whether anyone could tell me how to capture the long keypress of the volume down key in android. Elaborated question: I wanted to create a BroadcastReceiver which will receive volume long keypress event. (without any UI interaction). I know it's possible for the search button. is it available for the Volume Keys? Thanks 回答1: may be below code will help you: @Override public boolean onKeyLongPress(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN) { // to your stuff here return true; } return super

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: i wrote few line to accept only numeric character but my script is not working. when i type any alphabet then it is getting inserted into textbox which i do not want. i want that textbox should accept only numeric value and "." point for decimal. here is my script. just tell me what is wrong there. $ (). ready ( function () { $ ( "input[id*='txtQty']" ). keyup ( function ( event ) { var flag = false ; if ( event . shiftKey == true ) { event . preventDefault (); } // Allow Only: keyboard 0-9, numpad 0-9, backspace, tab, left arrow,

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: using jQuery here, however unable to prevent numbers from being typed into the input field http://codepen.io/leongaban/pen/owbjg Input <input type="text" name="field" maxlength="8" title="Only Letters" value="Type Letters Only" onkeydown="return alphaOnly(event);" onblur="if (this.value == '') {this.value = 'Type Letters Only';}" onfocus="if (this.value == 'Type Letters Only') {this.value = '';}"/> jQuery function alphaOnly(event) { alert(event); var key; if (window.event) { key = window.event.key; } else if (e) { key = e.which; } //var key

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: The problem: Limit allowed characters in a HTML input to a-z A-Z only. For business requirements this needs to be done on KeyPress so that the character simply isnt allowed to even appear in the input. Tab, enter, arrows, backspace, shift are all allowed. The user must be able to freely move in and out of the textbox, delete characters etc etc. This is the starting point of my code... var keyCode = ( e . keyCode ? e . keyCode : e . which ); However every value that I get in keyCode doesnt correspond to any of the character charts I

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I recently developed a virtual keyboard application for a customer. The program is working fine with almost all programs, but certain commands like {ENTER} or {DEL} are not working with Citrix. Is there are workaround or an alternative to SendKeys ? Edit 1: I tried the SendInput method (Windows Input Simulator uses SendInput) and the DEL key as well as the arrow keys are still not working. The ENTER key works however. Edit 2: Solved it. Tested with two different versions of Citrix. This question helped me a lot. : Citrix thin clients uses