backspace

问题 I've just noticed that DataGridView s have a default shortcut so that whenever you press Ctrl + H , the DataGridView 's editing control backspaces, and can delete your entire selection within the cell. This can get quite annoying since I want to open a Replace box whenever Ctrl + H is pressed. Is there any way to stop the backspacing while still being able to use it to open the replace box? I'm running C# 2.0, but I could update my application to 3.5 if the newer C# has a solution. 回答1: This

问题 I faced this issue in my AngularJS webapp. When a user enters a page with a form to fill and he starts typing, if he presses the backspace key and the focus is not on the input text, then the page goes to the previous state. I looked up this solution using jQuery, but it doesn't seem the appropiate way for achieve this in AngularJS. 回答1: There is $document in angular js: angular.module('yourModule', []) .controller('yourController', ['$scope', '$document', function($scope, $document) {

问题 I want to make a program that forces it's user to input text but doesn't allow him to erase any of it, what's a simple way of doing it in C? The only thing I've got is (c = getchar()) != EOF && c != '\b' which doesn't work. Any ideas? 回答1: POSIX - unix version #include <sys/types.h> #include <termios.h> #include <stdio.h> #include <string.h> int main() { int fd=fileno(stdin); struct termios oldtio,newtio; tcgetattr(fd,&oldtio); /* save current settings */ memcpy(&newtio, &oldtio, sizeof

问题 I want to make a program that forces it's user to input text but doesn't allow him to erase any of it, what's a simple way of doing it in C? The only thing I've got is (c = getchar()) != EOF && c != '\b' which doesn't work. Any ideas? 回答1: POSIX - unix version #include <sys/types.h> #include <termios.h> #include <stdio.h> #include <string.h> int main() { int fd=fileno(stdin); struct termios oldtio,newtio; tcgetattr(fd,&oldtio); /* save current settings */ memcpy(&newtio, &oldtio, sizeof

问题 This program copy its input to its output, replacing TAB( \t ) by \t backspace( \b ) by \b . But here in my code I am unable to read input character when I enter backspace its not replacing as a tab works . Compiling with GCC in Linux: #include<stdio.h> int main(void) { int c=0; while((c=getchar())!=EOF){ if(c=='\t'){ printf("\\t"); if(c=='\b') printf("\\b"); } else putchar(c); } return 0; } Suppose if I type vinay (tab) hunachyal Output:vinay\thunachyal If I type vinay(and 1 backspace)

问题 I need a web-based text/code editor that behaves well, for my App. I'm trying to use codemirror under Phonegap and currently I'm having problems getting backspace to work for previously entered text. This is a huge problem for my use case. Now I've had a look around and it seems like it's not a direct codemirror problem, but rather the android and virtual keyboard malarkey, see this question: Android: Backspace in WebView/BaseInputConnection I'm using Phonegap version 2.6.0, latest codemirror

问题 How can I detect when a user pressed "return" keyboard button while editing UITextField? I need to do this in order to dismiss keyboard when user pressed the "return" button. Thanks. 回答1: - (BOOL)textFieldShouldReturn:(UITextField *)textField { [textField resignFirstResponder]; return NO; } Don't forget to set the delegate in storyboard... 回答2: Delegation is not required, here's a one-liner: - (void)viewDidLoad { [textField addTarget:textField action:@selector(resignFirstResponder)

问题 Has any one ever seen a backspace delimited flat file? My requirement is to parse such a file but I am not able to put a backspace character into a file to check if I am able to detect it. 回答1: Splitting shouldn't be any harder than using any other delimiter. It's just another character, after all. In Python, for instance: >>> x = "apples\bbanana\bcoconut\bthese are delicious!" >>> x.split('\b') ['apples', 'banana', 'coconut', 'these are delicious!'] Most languages use \b as the escape

问题 I have an input form that has a jQuery event applied to it that creates square brackets around the users input. The issue is that the event prevents the ability to use backspace to delete the text. I'm looking for a way to check if backspace is being pressed and prevent the code from runnning. jQuery Script function test(obj) { var oldVal = obj.val().replace(/\[/g,\'\'); oldVal = oldVal.replace(/\]/g,\'\'); var val = \'[\' + oldVal + \']\'; obj.val(val); Input Form oninput="test($(this));"

问题 I am using Substance L&F and I have set a JComboBox to editable so that i can select the value that i want from its popup, or type a new value in its Editor. Typing a new value works fine, but if i want to delete a miss-typed letter from the Combo editor, and i click Backspace to do that it selects the letters in the editor instead of erasing them. Here is a screenshot : I want the Combo editor to work like a JTextField when typing keyboard letters or Backspace or Delete in it, so is there a