how to handle space-bar in taking input from user in a string.my code is
btnSearch.addEventListener(MouseEvent.CLICK, getData);
function getData(event:MouseEvent)
{
var input:String = textfieldName.text;
if((input != null)&&(input.length != 0)&&(input != ""))
{
func(input);
}
}
when user hits backspace, func is called and input string length increased as many times as the spacebar is clicked.
what you have to di first is to validate the input, e.g. you can trim all white space (you could also do it on the textfield e.g. by applying the allowed characters to the restrict property
textfieldName.restrict = "0-9";//this will restrict to only integer values
to strip in your getData handler you could do as follows:
//trim begin
while(input && input.charAt(0) == " ")
{
input = input.substr(1);
}
placed after you read the input value from textfield.
best regards
Related
I have an input field where the user can input a numeric value. I need to automatically insert commas after every 3rd digit. When the user deletes numbers, the commas need to be in the correct places (after every 3rd digit, starting from the first number) as well as stay in place instead of relocating to the end of the input value. I cannot use ngModel, this is a reactive form.
I have tried this method in my TS file, to mask the user input
maskInputAmount(e) {
const t = e.target.value.replace(/\D/g, '').match(/(\d{0,3})(\d{0,3})
(\d{0,3})/);
e.target.value = t[2] ? t[1] + ',' + t[2] + (t[3] ? ',' + t[3] : '') :
t[1];
}
And in my HTML input field
<input (input)="maskInputAmount($event)" maxlength=11
formControlName="businessNetWorth" id="businessNetWorth"
type="text" class="form-control col-3 col-lg-12" data-hint="yes">
I am having commas come after every 3rd number. However, when deleting numbers from the end of the input, the commas at the front of the number should update correctly. For example, I enter '123,456,789'. When I delete the last two numbers I get '123,456,7' when it should be '1,234,567'.
One other issue, when a user deletes one of the first numbers, the comma in the input box automatically repositions itself to the end of the input value, I need it to stay in place. For example: '123,456,789'. I delete '3' and have '124,567,89' and the cursor is now behind the '9' when it should stay in front of the '2'.
How can I change my maskInputAmount(e) method to make this behave correctly?
Following code worked for me. (Assume present currency is in Indian rupees. If you want to have your own currency then you need to mention your country's code in code).
app.component.html
<input type="text" [formControl]="currency" (input)="changeToCurrency(currencyTextRef)" #currencyTextRef>
//sending reference of input element #currencyTextRef to function
{{ currency.value }}
app.component.ts
currency = new FormControl();
temp;
currncyLength=0;
changeToCurrency(currencyTextRef) {
this.currncyLength = this.currency.value.length;
console.log("currency len is "+this.currncyLength);
let index:number;
// if(currencyTextRef.selectionStart || currencyTextRef.selectionStart == '0') {
// console.log("index isss "+currencyTextRef.selectionStart);
index = currencyTextRef.selectionStart; //getting caret(cursor) position
// }
console.log("index is "+index);
// console.log("value is "+this.currency.value);
let a = this.currency.value;
a = a.replace(/,/g,'');
let num:number = + a;
let temp = new Intl.NumberFormat('en-IN').format(num); //inplace of en-IN you can mention your country's code
// console.log("temp is "+temp);
this.currency.setValue(temp.toString());
console.log("pressent len iss "+this.currency.value.length)
if(this.currncyLength<this.currency.value.length) {
console.log("incoming to < ")
index+=1;
currencyTextRef.setSelectionRange(index,index);
}
else if(this.currncyLength >=this.currency.value.length) {
console.log("incoming to > ");
// index-=1;
currencyTextRef.setSelectionRange(index,index);
}
// else {
// currencyTextRef.setSelectionRange(index,index);
// }
}
Following link might help.
Intl number MDN
My code works, except it is requiring and extra "Space" at the end to be placed in order for the button to activate? Any ideas? I obviously don't have the space at the end of the user names or passwords in the code. This happens on another frame as well where I have the user type in a web address, I have the conditional set as == "md.website.com" but it is requiring "md.website.com " (extra space at the end) in order for the button to activate.
This code is expecting "AB1234 " and "newuser " instead of "AB1234" "newuser" like I need and I am telling it... I'm sorry, I'm new to AS3 and learning ALL I can, this site rocks for all the help I've already gotten!
username_txt.addEventListener(TextEvent.TEXT_INPUT,paramChanged3);
password_txt.addEventListener(TextEvent.TEXT_INPUT,paramChanged3);
next_btn.enabled = false;
next_btn.alpha = .5;
function paramChanged3(event:TextEvent):void
{
if (username_txt.text == "AB1234" && password_txt.text == "newuser" )
{
trace("go")
next_btn2.enabled = true;
next_btn2.alpha = 1;
next_btn2.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndPlay_20)
}
else
{
next_btn2.enabled = false;
next_btn2.alpha = .5;
}
}
function fl_ClickToGoToAndPlay_20(event:MouseEvent):void
{
gotoAndPlay(20);
}
The problem is that the TextEvent.TEXT_INPUT fires before the text field is actually updated. Try using Event.CHANGE instead (or using two TextEvent.TEXT_INPUT callbacks and appending the input character with event.text within each).
I don't know why AS3 is requiring the extra space, but I removed the exact conditional, and just did a minimum character count. Of course the trainee can then type in anything as long as it matches the minimum requirement, but again, the actual usernames and passwords don't matter, its all simulation anyways, here is the code with the character count....
username_txt.addEventListener(TextEvent.TEXT_INPUT,paramChanged3);
password_txt.addEventListener(TextEvent.TEXT_INPUT,paramChanged3);
next_btn.enabled = false;
next_btn.alpha = .5;
function paramChanged3(event:TextEvent):void
{
if (username_txt.text != "" && username_txt.length >=5 &&
password_txt.text != "" && password_txt.length >=6)
{
trace("go")
next_btn2.enabled = true;
next_btn2.alpha = 1;
next_btn2.addEventListener(MouseEvent.CLICK, fl_ClickToGoToAndPlay_20)
}
else
{
next_btn2.enabled = false;
next_btn2.alpha = .5;
}
}
function fl_ClickToGoToAndPlay_20(event:MouseEvent):void
{
gotoAndPlay(20);
}
When I create a list of button and I addTouchEventListener for it, like below code
for (int i = 0; i < btmPlay.size(); i++ )
{
btmPlay.at(i)->addTouchEventListener([&](Ref *sender, ui::Widget::TouchEventType type){
if (type == ui::Widget::TouchEventType::ENDED)
{
CCLOG("%i", i);
}
});
}
when I touch to the first button, the result is 12 ( btmPlay.size() = 13).
What errors?
In your closure, you're capturing the variable i by reference, and that's why clicking any button will print the same value, in this case 12. If, instead, you capture the variable i by value (by replacing [&] with [=]) then each button will print a different value in the range 0-12.
Btw, capturing i by reference in your example is also wrong, because by the time the closure is invoked, the variable is already out of scope, and printing it is UB.
I'm trying to create a new keyboard somehow, for educational purposes.
I've written this code using actionscript 3.I've created an input text field (named it t1) .when the user presses q button on keyboard(which has an ASCII aquals 81 ) I want the letter b to be printed out on the text field so i've written this code :
stage.addEventListener(KeyboardEvent.KEY_DOWN, pressing);
function pressing(event:KeyboardEvent):void
{
//trace(event.keyCode);
if(event.keyCode==81)
t1.replaceSelectedText("b");
}
the problem was that the method replaceSelectedText prints the tow letters on the screen(q&b) which method can i use instead?
Any help would be appreciated.
When using the replaceSelectedText method, you first need to select the text you want to replace. This can be done with the "setSelection" method. This from the adobe help website:
setSelection(beginIndex:int, endIndex:int):void
"Sets as selected the text designated by the index values of the first and last characters, which are specified with the beginIndex and endIndex parameters."
At the moment, since you don't have any text selected, it appears to just be adding the text "b" as it's replacing nothing. Therefore, you should try first selecting the "q".
Alternatively, you can just use a different method. from the adobe help website:
replaceText(beginIndex:int, endIndex:int, newText:String):void
"Replaces the range of characters that the beginIndex and endIndex parameters specify with the contents of the newText parameter."
This would cut out an extra line of code.
I haven't actually done this myself, so if that doesn't work, here's the link to the adobe help page for Text Fields: http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/text/TextField.html
I think that to do what you are looking for ( replace a char when it's typed ), a KeyboardEvent.KEY_DOWN is not enough, because when that event is fired, the text is not yet changed, so any change that you did in its handler to your text field will not cancel the insertion of the current typed char. Also, using KeyboardEvent.KEY_UP ( in addition to KeyboardEvent.KEY_DOWN ) will not resolve the problem, because you can fire n times a KeyboardEvent.KEY_DOWN event with the KeyboardEvent.KEY_UP event fired once !
So, I think that the best event that can do the job is the Event.CHANGE event which is fired every time the text of your text field is changed, so you can do like this :
// is there a char to replace ?
var replace_char:Boolean = false;
// the position of the char that we want to replace
var char_position:int = -1;
var text_input:TextField = new TextField();
text_input.type = 'input';
text_input.border = true;
text_input.addEventListener(Event.CHANGE, onTextChange);
function onTextChange(e:Event):void {
if(replace_char && char_position >= 0){
text_input.replaceText(char_position, char_position + 1, 'b');
replace_char = false;
}
}
addChild(text_input);
stage.addEventListener(KeyboardEvent.KEY_DOWN, _onKeyDown);
function _onKeyDown(e:KeyboardEvent):void {
if(e.keyCode == 81) {
replace_char = true;
char_position = text_input.selectionBeginIndex;
}
}
EDIT :
To use a list of keys and their equivalents, you can use an object to stock your keys like this :
// list of all keys (chars) and their equivalents
var chars:Object = {
81: 'b', // q => b
83: 'v', // s => v
68: 'c' // d => c
// other chars
}
var char_to_replace:int = -1;
// other instructions
function onTextChange(e:Event):void {
if(replace_char && char_position >= 0 && char_to_replace >= 0){
// get the equivalent of the pressed key from chars object using : chars[key_pressed]
text_input.replaceText(char_position, char_position + 1, chars[char_to_replace]);
replace_char = false;
}
}
// other instructions
function _onKeyDown(e:KeyboardEvent):void {
if(chars[e.keyCode]) {
replace_char = true;
// save the last pressed key to get its equivalent, or save this last one directly, to replace it next
char_to_replace = e.keyCode;
char_position = text_input.selectionBeginIndex;
}
}
Hope that can help.
In action script var x:String="123abc" I have to check any character, for that string.
i.e. here "abc" is that string so I give an alert that this string should contain only numbers.
How can I do that?
Do you mean to say that you would like to dispatch an alert if a string contains letters
var testVar:String = '123abc';
var pattern:RegExp = /[a-zA-Z]/g;
if( testVar.search(pattern) == -1 )
{
//all good there's no letters in here
}
else
{
//Alert, alert, letter detected!
}
the "pattern" variable is a RegularExpression that's adaptable. Here I'm only checking for letters... If you need more control, get more info about RegularExpressions or come back here with the specific filter you'd like to implement.
I think you are looking for Regular Expression support in AS3.
If the user is inputting text via a TextField then you can set the restrict property to limit the characters that can be entered into the textfield:
textFieldInstance.restrict = "0-9";
TextField.restrict documentation:
http://livedocs.adobe.com/flex/3/langref/flash/text/TextField.html#restrict