keydown

问题 I am having a difficult time with keydown and stop propagation i do not want my page to refresh, i have tried every which way i can think of, my current code is <script> $(document).ready(function() { var e = jQuery.event( 'keydown', { which: $.ui.keyCode.ENTER } ); $('#id_number').trigger(e, function(event){ event.preventDefault(); event.stopPropagation(); }); }); </script> any idea on what i am doing wrong here? I thought that the event was called correctly, i have jquery and jquery ui

问题 What's the better way to handle the ctrl + mouse wheel in C#? I've figured out how to handle the MouseWheel event but how to know that the ctrl key is being pressed too? Thanks in advance. 回答1: Use the static property like: System.Windows.Forms.Control.ModifierKeys 来源： https://stackoverflow.com/questions/268796/control-key-plus-mouse-wheel

问题 That's my code: override func keyDown(theEvent: NSEvent) { super.keyDown(theEvent) switch theEvent.character { case NSLeftArrowFunctionKey: println(1) case NSRightArrowFunctionKey: println(2) case NSDownArrowFunctionKey: println(3) case NSUpArrowFunctionKey: println(4) default: break } } As you can see, I try to recognize if one of arrow buttons was pressed, but it never works. Even the function keyDown never seems to be called. That's what is written in viewDidAppear , if this can help you

问题 I'm trying to find a way to validate a text input on key press, I want to allow numbers only inside my text input including decimals. I was taking the approach of using jQuery.keydown, and checking what the key was and using event.preventDefault() if the key was not in the allowed list. But since then I've read that keys aren't consistent throughout browsers and I'm also worries about different OS's. I've come across this question but I'm not fluent in regex and not sure whether this would

问题 I have a webform and i want to detect if F5 button was pressed or if the page was refreshed. I know about postback but it is not what i'm looking for. I have a gridview that loads in a modal popup when a button is clicked and a parameter's value is set for the gridview. When refresh is hit and if the modal popup button was previously clicked the modal popup is visible right after refresh. I want to detect if the page is refreshed to prevent this. any ideas? I thought to try Override but I'm

问题 I used to have a jQuery app, that had a 'keydown' event once the document was ready. Basically, anytime a user hit a key, it would match the keycode and do something. Now I ported this app to Ember and life became difficult for 2 reasons: 1) The only time a 'keyDown' event can be registered is when the containing element/View has a focus on it. The only way this can be done with non-input fields is by setting the tabindex value, to achieve this, I do this: didInsertElement:function(){ this.$(

问题 This seems like something that should be easy, but I am having a tough time figuring out what needs to happen here. In the "KeyDown" eventhandler, if the "e.KeyValue" is a number, I want to treat it as a number and store it as an int. So, if I hit "8" on the number pad, I don't want "Numpad8" I want the int value 8 that I can add or subtract or whatever. So, how do I convert from the KeyValue to an int? 回答1: I'd go with this solution: int value = -1; if (e.KeyValue >= ((int) Keys.NumPad0) &&

问题 In xcode last version, I am trying to get the keyDown event of an NSTextField. However, despite following multiple tutorials on the internet (delegates, controllers...), I still can't receive it. Any easy hint for me ? Thanks ! 回答1: I got sick of all the non answers to do it some other way people so I put my nose down and figured out a way to make this work. This isn't using keydown event directly but it is using the keydown in the block. And the behavior is exactly what I wanted. Subclass

问题 I have a NavigationWindow with Page : Page XAML: <Page x:Class="Existence.IntroPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" mc:Ignorable="d" ShowsNavigationUI="False" d:DesignHeight="300" d:DesignWidth="300" Title="IntroPage" Loaded="Page_Loaded"> <Grid Name="gridzik"> <Grid

问题 Hi everyone i have a key down event as follows if (e.KeyCode == Keys.C && e.KeyCode == Keys.Enter || e.KeyCode == Keys.Return) { var amount = textBox1.Text; var total = label3.Text; decimal damount = Math.Round(Convert.ToDecimal(amount), 2); decimal dtotal = Convert.ToDecimal(total); var ntotal = dtotal - damount; var ndue = Math.Round(Convert.ToDecimal(ntotal), 2); var ntotal1 = Convert.ToString(ndue); if (ndue <= 0) { panel4.Show(); label4.Text = ntotal1; } else { label3.Text = ntotal1; }