textfield

问题 I need to configure my ExtJs textfield to accept only numbers which can be positive , negative , integer and decimals upto 2 decimals . I tried with maskeRe and regular expression /^-?[0-9]\d*(\.\d+)?$/ . But its accepting only positive integers. User should not be able to type restricted characters. Also it should accept '-' only at first place and '.' in between and only once. So it should accept : 10, -10, 10.12, -10.34 etc Link to my fiddle Thanks 回答1: Change your maskRe to maskRe: /[0-9.

问题 I need to configure my ExtJs textfield to accept only numbers which can be positive , negative , integer and decimals upto 2 decimals . I tried with maskeRe and regular expression /^-?[0-9]\d*(\.\d+)?$/ . But its accepting only positive integers. User should not be able to type restricted characters. Also it should accept '-' only at first place and '.' in between and only once. So it should accept : 10, -10, 10.12, -10.34 etc Link to my fiddle Thanks 回答1: Change your maskRe to maskRe: /[0-9.

问题 I've got the most annoying problem with my GUI Exporter in Maya. I've made the textField etc. work, but I can't change the value of the textField after it's created, which is what I need to do. What I want to do for example is, let's say the filepath is none from the beginning. The textField has now printed out: "None" in it, but after you press browse and select a directory, I want it to change None to the directory path etc. That's the only problem I currently have and the error code

问题 I'm able to resize Text Field in Chrome & other browsers. However, I'm not able to make the same work in IE9, even after installing the Chrome frame for IE. I use for Ex: style="resize:horizontal;" Ex: Can someone suggest me how to make it work in IE browsers? Thanks. * EDIT * Ok, So after a lot of tweaking around, I finally made it to work for IE9 !! Yay :) First things first : You need to install the Chrome Frame on IE9. Then you add some tags for it to render on IE. <meta http-equiv="X-UA

问题 This is my current code, all it does is set up a GUI interface for a calculator I made. I want the user to enter in two values and then when the "Sum" button is pressed it adds the two values together and displays it in the "Sum:" TextField. I'm experimenting with JavaFX, some help would be greatly appreciated. import javafx.application.*; import javafx.scene.*; import javafx.scene.control.*; import javafx.stage.*; import javafx.scene.layout.*; import javafx.geometry.*; import javafx.event.*;

问题 How to create a swiftui textfield that allows the user to only input numbers and a single dot? In other words, it checks digit by digit as the user inputs, if the input is a number or a dot and the textfield doesn't have another dot the digit is accepted, otherwise the digit entry is ignored. Using a stepper isn't an option. 回答1: SwiftUI doesn't let you specify a set of allowed characters for a TextField . Actually, it's not something related to the UI itself, but to how you manage the model

问题 Because I'm a terrible, bad person who likes to do things differently for no reason, I'd love to be able to do something like mySprite.graphics.drawText(...). As I understand things, the only way to get text currently is to create a TextField and add it as a child of mySprite. In my particular situation I'd rather not do that. Any advice appreciated! ooo 回答1: If you wanted to wrap it up in a method of Sprite I would simply extend the Sprite class, add the function drawText to it. Within that

问题 I would like to know the working of the following code. - (BOOL) textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string { NSString *newString = [textField.text stringByReplacingCharactersInRange:range withString:string]; return !([newString length] > 10); } What does "stringByReplacingCharactersInRange" do? And how does the above method limit the number of characters that can be entered in the textField? Thanks in advance! 回答1:

问题 The TextField widget doesn't seem to have a "limit" attribute to limit the number of characters that can be typed. How I can enforce that only a certain number of characters can be provided as input in a TextField Widget. I tried looking at the decoration property and potentially setting the limit there somehow but that didn't seem to work either. Is there a different widget I should be using? 回答1: maxLength property is available in Flutter https://docs.flutter.io/flutter/material/TextField

问题 The TextField widget doesn't seem to have a "limit" attribute to limit the number of characters that can be typed. How I can enforce that only a certain number of characters can be provided as input in a TextField Widget. I tried looking at the decoration property and potentially setting the limit there somehow but that didn't seem to work either. Is there a different widget I should be using? 回答1: maxLength property is available in Flutter https://docs.flutter.io/flutter/material/TextField