I have created a simple TODO app with AngularJS.
So I have here a list of TODOs. I can delete , set as completed , and add new ones.
I can also edit the title via double clicking the bold text. And now - a text input will appear instead:
Basically , each row ( under the ng-repeat) has an invisible input which I play with its visibilkity :
<li ng-repeat="todo in vm.todos....." ...>
<div ng-hide="vm.isTheEdited(todo)"> //this is "read" mode
....show checkbox + Label + Delete button
</div>
<input ... show="vm.isTheEdited(todo)".... /> // this is the "edit" mode
</li>
All OK
But I saw this code which counts watchers in an App .
So I enhanced it to show unique items and in a string way.
(All I did was adding) :
Array.prototype.unique = function(a){
return function(){ return this.filter(a) }
}(function(a,b,c){ return c.indexOf(a,b+1) < 0 })
console.log(getWatchers().unique().length);
console.log(getWatchers().unique().map(function (a){return a.exp;}));
)*
This is not important.
The important thing is that it has many duplicates watchers !!!
Look at the results :
Question
why do I have so many duplicates entries and how can I reduce the number of the watchers? (and eliminate dups)
All I did was to use ng-show and hide via some value of function.
In fact I don't think there isn't any duplicate: both ngShow an ngHide create a watcher and you can't do anything to avoid that using native directives: you should expect at least two watcher for each row in this case.
The only way to remove watchers (all of them) is to create a custom directive that:
hides the label and show the input on double click
shows the label and hide the input when pressing enter
Example:
module.directive('myClick', function() {
return {
link: function(scope, element) {
var span = element.find('span'),
input = element.find('input');
input.hide();
span.on('dblclick', function() {
if (span.is(':visible')) {
span.hide();
input.show();
input.val(span.text());
}
});
input.on('keypress', function(e) {
if (e.which === 13) {
input.hide();
span.show();
span.text(input.val());
}
});
}
}
});
Html:
...
<div ng-repeat="todo in vm.todos" my-click>
<span>{{todo}}</span><input>
</div>
...
Related
I'm working on autocomplete textbox feature of angularjs. I want the user only to select name from the existing autocomplete list instead of typing a new name. Eg.,When user types 'Al' autocomplete list shows the matching list and user can select one name from the existing list instead of typing a new name.How to restrict user from submitting a new name which is not present in the existing list.
Demo : http://plnkr.co/edit/AdmtP1b6K9kQorMHmt7t?p=preview
Code Sample:
$scope.countryList = ["Afghanistan","Albania","Algeria","Andorra","Angola","Anguilla","Antigua & Barbuda","Argentina","Armenia","Aruba","Australia","Austria","Azerbaijan","Bahamas","Bahrain","Bangladesh","Barbados","Belarus","Belgium","Belize","Benin","Bermuda","Bhutan","Bolivia","Bosnia & Herzegovina","Botswana","Brazil","British Virgin Islands","Brunei"];
$scope.validateField = function(){
alert("Clicked on submit , validte field");
}
$scope.complete=function(string){
var output=[];
angular.forEach($scope.countryList,function(country){
if(country.toLowerCase().indexOf(string.toLowerCase())>=0){
output.push(country);
}
});
$scope.filterCountry=output;
}
$scope.fillTextbox=function(string){
$scope.country=string;
$scope.filterCountry=null;
}
Any inputs would be helpful.
You can disable submit button and also highlight the border of the input field red, telling user to select name from drop down list.
First you need to update your complete() function. Use an else if statement that will check if the value is from the list or not, if not then you can implement your desired logic in that else if statement.
This method is flexible and easy to customize your error generation messages. You can show and hide the div that has the error message or you can apply css style on input-field using ng-style or ng-class. Right now I'll show you how to disable or enable button. Here is the updated code snippet:
$scope.complete = function(string) {
var output = [];
angular.forEach($scope.countryList, function(country) {
if (country.toLowerCase().indexOf(string.toLowerCase()) >= 0) {
output.push(country);
$scope.enableDisable = false;
} else if (country.toLowerCase().indexOf(string.toLowerCase()) < 0) {
$scope.enableDisable = true;
}
});
$scope.filterCountry = output;
}
And the In the html section you just need to add ng-disabled attribute and set its value.
<input type="submit" value="submit" ng-disabled="enableDisable" ng-click="validateField()">
So, you can do whatever you want in that else if statement to get the desire error message.
Take a look at this plunkr.
you can check for the validity of input using something like below and monitoring the value using ng-change
$scope.checkInput = function(){
$scope.validInput = $scope.countryList.indexOf($scope.country) > -1;
}
I've created this jsBin to demonstrate the issue I'm having. If you go here, try type "Five" and move on. Your natural reaction would be to type "Five" and then press tab, and if you wanted "Five-Hundred," you'd arrow-down once; however, in this case, you have to type "Five" and then either press escape or physically mouse out of the box without clicking any of the other options
So, basically, when you're using typeahead, if there is at least one matching result for your current criteria, pressing tab will select it. My expected behavior is that as you type, the current selected option is exactly what you're typing, and if you want one of the other results you must down-arrow one or more times.
Here is the code that's in the jsBin:
<div ng-controller="TestController">
<div>
{{selected}}
</div>
<input type="text" ng-model="selected" typeahead="item for item in typeaheadOptions | filter:$viewValue">
</div>
And the JavaScript:
var app = angular.module('app', ['ui.bootstrap'])
.controller('TestController', function($scope) {
$scope.typeaheadOptions = [
'One','Two','Three','Four','Five-Hundred','Fifteen','Fourteen','Fifty','Six','Seven','Eight','Nine','Ten'
]
});
I ended up modifying ui-bootstrap to work how I want it to.
I added a mustMouseDownToMatch property/attribute to the directive, like:
<input type="text" ng-model="selected" typeahead="item for item in typeaheadOptions | filter:$viewValue" typeahead-mouse-down-to-match="true">
And the javascript:
var mustMouseDownToMatch = originalScope.$eval(attrs.typeaheadMouseDownToMatch) ? originalScope.$eval(attrs.typeaheadMouseDownToMatch) : false;
I also added this function which will put the current text into the first item of the typeahead list, and make it the selected item:
var setFirstResultToViewValue = function (inputValue) {
scope.matches.splice(0, 0, {
id: 0,
label: inputValue,
model: inputValue
});
// set the selected item to the first item in the list, which is this guy
scope.activeIdx = 0;
}
And that is called in the getMatchesAsync call in the typeahead directive:
var getMatchesAsync = function(inputValue) {
// do stuff
$q.when(parserResult.source(originalScope, locals)).then(function(matches) {
// do stuff
if (matches.length > 0) {
// do stuff
}
if (mustMouseDownToMatch) {
setFirstResultToViewValue(inputValue);
}
// do stuff
};
A more recent way to do this since I ran into the same issue and maybe wasn't available back then.
You can add this now as an attribute
typeahead-should-select="$ctrl.typeaheadShouldSelect($event)"
In your controller or custom component add the following which will allow you to tab now and also if you tab over the item you can press enter to select it.
self.typeaheadShouldSelect = function($event) {
if ($event.key === 'Tab') {
var e = $.Event('keydown');
e.which = 40;
$($event.currentTarget).trigger(e);
}
if ($event.key === 'Enter') {
return true;
}
}
I have a webpage I'm building where I need to be able to select 1-9 members via a dropdown, which then provides that many input fields to enter their name. Each name field has a "suggestion" div below it where an ajax-fed member list is populated. Each item in that list has an "onclick='setMember(a, b, c)'" field associated with it. Once the input field loses focus we then validate (using ajax) that the input username returns exactly 1 database entry and set the field to that entry's text and an associated hidden memberId field to that one entry's id.
The problem is: when I click on the member name in the suggestion box the lose focus triggers and it attempts to validate a name which has multiple matches, thereby clearing it out. I do want it to clear on invalid, but I don't want it to clear before the onclick of the suggestion box name.
Example:
In the example above Paul Smith would populate fine if there was only one name in the suggestion list when it lost focus, but if I tried clicking on Raphael's name in the suggestion area (that is: clicking the grey div) it would wipe out the input field first.
Here is the javascript, trimmed for brevity:
function memberList() {
var count = document.getElementById('numMembers').value;
var current = document.getElementById('listMembers').childNodes.length;
if(count >= current) {
for(var i=current; i<=count; i++) {
var memberForm = document.createElement('div');
memberForm.setAttribute('id', 'member'+i);
var memberInput = document.createElement('input');
memberInput.setAttribute('name', 'memberName'+i);
memberInput.setAttribute('id', 'memberName'+i);
memberInput.setAttribute('type', 'text');
memberInput.setAttribute('class', 'ajax-member-load');
memberInput.setAttribute('value', '');
memberForm.appendChild(memberInput);
// two other fields (the ones next to the member name) removed for brevity
document.getElementById('listMembers').appendChild(memberForm);
}
}
else if(count < current) {
for(var i=(current-1); i>count; i--) {
document.getElementById('listMembers').removeChild(document.getElementById('listMembers').lastChild);
}
}
jQuery('.ajax-member-load').each(function() {
var num = this.id.replace( /^\D+/g, '');
// Update suggestion list on key release
jQuery(this).keyup(function(event) {
update(num);
});
// Check for only one suggestion and either populate it or clear it
jQuery(this).focusout(function(event) {
var number = this.id.replace( /^\D+/g, '');
memberCheck(number);
jQuery('#member'+number+'suggestions').html("");
});
});
}
// Looks up suggestions according to the partially input member name
function update(memberNumber) {
// AJAX code here, removed for brevity
self.xmlHttpReq.onreadystatechange = function() {
if (self.xmlHttpReq.readyState == 4) {
document.getElementById('member'+memberNumber+'suggestions').innerHTML = self.xmlHttpReq.responseText;
}
}
}
// Looks up the member by name, via ajax
// if exactly 1 match, it fills in the name and id
// otherwise the name comes back blank and the id is 0
function memberCheck(number) {
// AJAX code here, removed for brevity
if (self.xmlHttpReq.readyState == 4) {
var jsonResponse = JSON.parse(self.xmlHttpReq.responseText);
jQuery("#member"+number+"id").val(jsonResponse.id);
jQuery('#memberName'+number).val(jsonResponse.name);
}
}
}
function setMember(memberId, name, listNumber) {
jQuery("#memberName"+listNumber).val(name);
jQuery("#member"+listNumber+"id").val(memberId);
jQuery("#member"+listNumber+"suggestions").html("");
}
// Generate members form
memberList();
The suggestion divs (which are now being deleted before their onclicks and trigger) simply look like this:
<div onclick='setMember(123, "Raphael Jordan", 2)'>Raphael Jordan</div>
<div onclick='setMember(450, "Chris Raptson", 2)'>Chris Raptson</div>
Does anyone have any clue how I can solve this priority problem? I'm sure I can't be the first one with this issue, but I can't figure out what to search for to find similar questions.
Thank you!
If you use mousedown instead of click on the suggestions binding, it will occur before the blur of the input. JSFiddle.
<input type="text" />
Click
$('input').on('blur', function(e) {
console.log(e);
});
$('a').on('mousedown', function(e) {
console.log(e);
});
Or more specifically to your case:
<div onmousedown='setMember(123, "Raphael Jordan", 2)'>Raphael Jordan</div>
using onmousedown instead of onclick will call focusout event but in onmousedown event handler you can use event.preventDefault() to avoid loosing focus. This will be useful for password fields where you dont want to loose focus on input field on click of Eye icon to show/hide password
The following jQuery function filters my table columns by letter. There is an <a> for each letter. I'm not sure how to add another function though to filter column 1 using a different dropdown on the html side.
JavaScript:
function fil(rexp)
{
$('#tablestyle').dataTable().fnFilter(rexp, 0, true, false);
}
HTML:
<div style="float:left;" class="sortalpha">
ALL
| A
| B
<!-- [...] -->
| Z
</div>
What I have tried to do is copy the top part and change fil to fil2 then copy the HTML part and change those to fil2. Is that the correct way?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Just to give everyone a bit more info, I am using datatables {www.datatables.net} which is a jquery script that presents tables in a nice looking ui with various differnt functions to it like search, filter records per page etc.
I have implemented this mod that someone has listed here >> http://www.datatables.net/forums/discussion/6641/filtering-with-first-letter/p1
It works fine and when I select each letter it filters column 0 using whatever letter I have clicked on. What I am trying to do is have two different filters, one to filter column 0 which is the name of the person, and also another filter that does exaclty the same thing, but for column 1 which is business name, I just wasnt sure how to add the same piece of code twice?.
I don't really know your context, but I would suggest you try using event handlers instead of JavaScript URLs.
So instead of this:
ALL
You could do this:
$('.sortalpha a').on('click', function() {
fil('');
});
Of course, this would make all links filter on ''. To fix that, you could get the text from the <a> that was clicked and use that to call fil(), like so:
function fil(rexp) {
if (rexp.length > 0) {
rexp = '^' + rexp;
}
//$('#tablestyle').dataTable().fnFilter(rexp, 0, true, false);
alert('Filter on: "' + rexp + '"');
}
$('.sortalpha a').on('click', function(event) {
var letter = $(this).text().toLowerCase();
if (letter === 'all') {
fil('');
} else {
fil(letter);
}
});
Here's a working example: http://jsfiddle.net/uzGat/2/
Edit: I updated the answer to account for capital letter and the ^ in the regular expressions.
if the plugin is well written, it must maintain chainbilty so you can do like:
function fil(rexp)
{
$('#tablestyle').dataTable().fnFilter(rexp, 0, true, false).fnFilter(rexp2, 0, true, false);
}
I'm using a custom jQuery plugin to convert radio buttons to actual images, and it works with basic checkboxes, but when using Cake's built-in input form helper, it acts more as a checkbox by not unchecking the already clicked options. Not only that, but it isn't populating $this->data (or sending anything when the form is submitted).
The js looks like this:
//##############################
// jQuery Custom Radio-buttons and Checkbox; basically it's styling/theming for Checkbox and Radiobutton elements in forms
// By Dharmavirsinh Jhala - dharmavir#gmail.com
// Date of Release: 13th March 10
// Version: 0.8
/*
USAGE:
$(document).ready(function(){
$(":radio").behaveLikeCheckbox();
}
*/
$(document).ready(function() {
$("#bananas").dgStyle();
var elmHeight = "15"; // should be specified based on image size
// Extend JQuery Functionality For Custom Radio Button Functionality
jQuery.fn.extend({
dgStyle: function()
{
// Initialize with initial load time control state
$.each($(this), function(){
var elm = $(this).children().get(0);
elmType = $(elm).attr("type");
$(this).data('type',elmType);
$(this).data('checked',$(elm).attr("checked"));
$(this).dgClear();
});
$(this).mouseup(function() {
$(this).dgHandle();
});
},
dgClear: function()
{
if($(this).data("checked") == true)
{
$(this).addClass("checked");
}
else
{
$(this).removeClass("checked");
}
},
dgHandle: function()
{
var elm = $(this).children().get(0);
if($(this).data("checked") == true)
$(elm).dgUncheck(this);
else
$(elm).dgCheck(this);
if($(this).data('type') == 'radio')
{
$.each($("input[name='"+$(elm).attr("name")+"']"),function()
{
if(elm!=this)
$(this).dgUncheck(-1);
});
}
},
dgCheck: function(div)
{
$(this).attr("checked",true);
$(div).data('checked',true).addClass('checked');
},
dgUncheck: function(div)
{
$(this).attr("checked",false);
if(div != -1)
$(div).data('checked',false).css({
backgroundPosition:"center 0"
});
else
$(this).parent().data("checked",false).removeClass("checked");
}
});
The PHP/Html looks like this:
<span id="bananas-cat" class="cat">
<?= $this->Form->radio('bananas',array(),array('legend' => false, 'id' => 'bananas', 'name' => 'category')); ?>
<label for="bananas">Bananas</label>
</span>
While it upon first inspection may look correct, when clicked, nothing gets passed within $this->data and it acts like a checkbox and doesn't unselect the value when I add an additional radio checkbox.
Although the radio functionality does work without CakePHP's html form helper like so:
<span id="animals-cat" class="cat">
<input type="radio" name="category" id="animals" />
<label for="animals">Animals</label>
</span>
If anyone can help me out here, I would be forever indebted. I've been trying to solve this for way too long now that I'm considering just scrapping the whole idea to begin with.
What I would suggest is see and compare the HTML output of example and one being generated by CakPHP, try to make it similar to example so that you can get your custom-radio-buttons working.
But if you can not do that I would highly recommend to override those helpers by some parameters so that you can get the exact HTML as an output and Javascript should work flawlessly.
Let me know if that does not work for you.