keydown

I asked a question earlier about keyhooks in vb.net. My current issue is such: I have created a program which should perform a certain action whenever a certain group of keys is pressed at the same time. The program must be able to run in the background, or in the system tray or something. Essentially, this should work like the KeyDown event on a form, except the form in this case is everything. I'm not certain if there is a way to do this directly from within the .net API, but if there is I certainly have not found it. That doesn't require a keyboard hook, you'll want to register a hot key.

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. Because SVG is not an input-type, listen for the event on the window instead: $(window).on('keypress', function (evt){ ... }) 来源： https://stackoverflow.com/questions/28323977/how-to-listen-keyboard

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 = false; } } } This function works fine with all the numbers but my problem happens when the shift key is

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 single condition, so I've made a switch case construct to deal with all the possible numeric keys, like

I can't figure out how to trigger a keydown event on a textarea element, e.g. imagine i have two textarea elements and when i type something in the first one, I want the second box to show the typing as well, but for a certain reason I have to do it via events. This is what I tried and it doesn't work: <script language="javascript" type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.js"></script> <textarea id='first'></textarea> <textarea id='second'></textarea> <script> jQuery("#first").keydown(function(event) { var keydown = jQuery.Event("keydown") keydown

I have a form with several controls. I want to run a specific sub on keydown event regardless any controls event. I mean if user press Ctrl+S anywhere on form it execute a subroutine. You should set the KeyPreview property on the form to True and handle the keydown event there When this property is set to true, the form will receive all KeyPress, KeyDown, and KeyUp events. After the form's event handlers have completed processing the keystroke, the keystroke is then assigned to the control with focus. .......... To handle keyboard events only at the form level and not allow controls to receive

I have some textboxes on a .net-page and want to achieve the following with jQuery: if the user presses return, the program should behave "as if" he had used the tab key, thus, selecting the next element. I tried the following code (and some more): <script type="text/javascript"> jQuery(document).ready(function () { $('.tb').keypress(function (e) { if (e.keyCode == 13) { $(this).trigger("keydown", [9]); alert("return pressed"); } }); }); <asp:TextBox ID="TextBox1" runat="server" CssClass="tb"></asp:TextBox> <asp:TextBox ID="TextBox2" runat="server" CssClass="tb"></asp:TextBox> but it just does

The objective is manually set a held key's "repeat rate". For example, when in a text box and pressing and holding the X key, I understand that there is browser-specific ways of repeating the pressed character . In some, it pauses, then continuously triggers the pressed key. In others, it doesn't repeat at all. I want to mitigate this by forcing the pressed key to repeat at a specific interval, regardless of browser. Through research, I've come up with a timer-based attempt, but in Safari, it does not repeat the character. I've got a menu system where holding down arrow scrolls through the

I want to capture the backspace event, just do the backspace's action, then add other action, but I am not sure the backspace's original action:Selection. Delete , -1 ? Sub AddKeyBinding() With Application ' \\ Do customization in THIS document .CustomizationContext = ThisDocument ' \\ Add keybinding to this document Shorcut: Backspace .KeyBindings.Add KeyCode:=BuildKeyCode(wdKeyBackspace), _ KeyCategory:=wdKeyCategoryCommand, Command:="TestKeybinding" End With End Sub ' \\ Test sub for keybinding Sub TestKeybinding() Selection.Delete , -1 ' I am not sure how to impl the original command If