I'm new at Angularjs and I'm trying to create an AngularJS project with jQuery File Upload but I could not distinguish between directives file controllers file and the view.
Can anyone help me by providing me a clear structure of how files should be placed? (controllers, directives, and view)
I wrote something for my very first Angular.js project. It's from before there was an Angular.js example, but if you want to see the hard way, you can have it. It's not the best, but it may be a good place for you to start. This is my directives.js file.
(function(angular){
'use strict';
var directives = angular.module('appName.directives', []);
directives.directive('imageUploader', [
function imageUploader() {
return {
restrict: 'A',
link : function(scope, elem, attr, ctrl) {
var $imgDiv = $('.uploaded-image')
, $elem
, $status = elem.next('.progress')
, $progressBar = $status.find('.bar')
, config = {
dataType : 'json',
start : function(e) {
$elem = $(e.target);
$elem.hide();
$status.removeClass('hide');
$progressBar.text('Uploading...');
},
done : function(e, data) {
var url = data.result.url;
$('<img />').attr('src', url).appendTo($imgDiv.removeClass('hide'));
scope.$apply(function() {
scope.pick.photo = url;
})
console.log(scope);
console.log($status);
$status.removeClass('progress-striped progress-warning active').addClass('progress-success');
$progressBar.text('Done');
},
progress : function(e, data) {
var progress = parseInt(data.loaded / data.total * 100, 10);
$progressBar.css('width', progress + '%');
if (progress === 100) {
$status.addClass('progress-warning');
$progressBar.text('Processing...');
}
},
error : function(resp, er, msg) {
$elem.show();
$status.removeClass('active progress-warning progress-striped').addClass('progress-danger');
$progressBar.css('width', '100%');
if (resp.status === 415) {
$progressBar.text(msg);
} else {
$progressBar.text('There was an error. Please try again.');
}
}
};
elem.fileupload(config);
}
}
}
]);
})(window.angular)
I didn't do anything special for the controller. The only part of the view that matters is this:
<div class="control-group" data-ng-class="{ 'error' : errors.image }">
<label class="control-label">Upload Picture</label>
<div class="controls">
<input type="file" name="files[]" data-url="/uploader" image-uploader>
<div class="progress progress-striped active hide">
<div class="bar"></div>
</div>
<div class="uploaded-image hide"></div>
</div>
</div>
Related
I'm running into an issue where I'm trying to bind an object property to a ref in Vue, using the new composition API. I'm expecting the template to re-render with the new value after setting the ref value, but I'm however getting a RefImpl {} instead. How would I solve this?
<template>
<v-card>
<v-card-text class="pa-2">
<div v-for="(social, index) in socials" :key="index">
<p>{{ social.value }}</p>
</div>
</v-card-text>
</v-card>
</template>
<script>
import { onMounted, ref } from "#vue/composition-api/dist/vue-composition-api";
export default {
setup() {
const testVariable = ref(0);
const socials = [
{
value: testVariable,
}
];
onMounted(() => {
setTimeout(() => testVariable.value = 100, 1000);
});
return {
socials,
}
},
}
</script>
<style scoped></style>
Your socials variable does not unref inner refs in template. Basically what you have to do in your template is using social.value.value. So I think renaming that variable would be better to something like
const socials = [
{
variable: testVariable,
}
];
So that you could do social.variable.value.
Details from Vue docs:
Note the unwrapping only applies to top-level properties - nested access to refs will not be unwrapped: Read More
Looks like your code works:
const { onMounted, ref } = Vue
const app = Vue.createApp({
setup() {
const testVariable = ref(0);
const socials = [{ value: testVariable, }];
onMounted(() => {
setTimeout(() => testVariable.value = 100, 1000);
});
return { socials, }
},
})
app.mount('#demo')
<script src="https://unpkg.com/vue#3.2.29/dist/vue.global.prod.js"></script>
<div id="demo">
<div v-for="(social, index) in socials" :key="index">
<p>{{ social.value }}</p>
</div>
</div>
I have the following pagination component.
If users adds remove items dynamically i.e via some ajax call, how do i ensure the correct active or disabled classes are applied on the pagination links?
For example if the user is currently on the last page which only has 1 item, if the user deletes that item, the pagination links re-render but then i lose the active disable class becuase that page no longer exists. i.e. the links should update to move the user to previous page.
<div class="comment-pager ">
<div class="panel panel-default panel-highlight no-border ">
<div class="panel-body padded-5">
<nav v-if="totalItems > pageSize">
<ul class="pagination">
<li v-bind:class="[currentPage == 1 ? disabled : '']">
<a v-on:click.prevent="previous()" aria-label="Previous">
<span aria-hidden="true">«</span>
</a>
</li>
<li v-bind:class="[currentPage == pages ? active : '']" v-for="page in pages" v-on:click.prevent="changePage(page)">
<a>{{ page }}</a>
</li>
<li v-bind:class="[currentPage == pages.length ? disabled : '']">
<a v-on:click.prevent="next()" aria-label="Next">
<span aria-hidden="true">»</span>
</a>
</li>
</ul>
</nav>
</div>
</div>
</div>
</template>
<script>
export default {
props: ['totalItems', 'pageSize']
data: function () {
return {
currentPage: 1,
pages: [],
}
},
watch: {
totalItems: function () {
var pagesCount = Math.ceil(this.totalItems / this.pageSize);
this.pages = [];
for (var i = 1; i <= pagesCount; i++)
this.pages.push(i);
}
},
methods: {
changePage: function (page){
this.currentPage = page;
this.$emit('pageChanged', page);
}
previous: function (){
if (this.currentPage == 1)
return;
this.currentPage--;
this.$emit('pageChanged', this.currentPage);
}
next: function () {
if (this.currentPage == this.pages.length)
return;
this.currentPage++;
this.$emit('pageChanged', this.currentPage);
}
},
}
</script>
<paginator v-bind:total-items="totalItems" v-bind:page-size="query.pageSize" v-on:pageChanged="onPageChange"></paginator>
There is no complete equivalent to ngOnChanges() in vue.
ngOnChanges() is a lifecycle hook which takes in an object that maps each changed property name to a SimpleChange object holding the current and previous property values.
If you want the lifecycle hook that gets invoked after every change in data and before re-rendering the virtual DOM then you should be using beforeUpdate() hook.
But as in ngOnChanges() you can't get the hold of which property is updated or what is it's oldvalue or newValue is.
As mklimek answered you can set up watcher on the properties you want to watch for changes.
In watcher you get what the oldValue is and what it's changed new value is
new Vue({
el:'#app',
data:{
prop1: '',
prop2: '' // property to watch changes for
},
watch:{
prop#(newValue, oldValue){
console.log(newValue);
console.log(oldValue);
}
}
});
EDIT
For your case you do not need a watcher. You can setup the pages[] property as a computed property:
computed:{
pages(){
var pageArray = [];
var pagesCount = Math.ceil(this.totalItems / this.pageSize);
for (var i = 1; i <= pagesCount; i++)
pages.push(i);
}
return pageArray;
}
computed properties are cached based on their dependencies. A computed property will only re-evaluate when some of its dependencies have changed in your case the props
totalItems and pageSize
Now you can use the pages computed property as normal data property
You probably want to use watch property of a Vue instance.
var vm = new Vue({
data: {
count: 1
},
watch: {
count: function (val, oldVal) {
console.log('new: %s, old: %s', val, oldVal)
}
})
Changing src attribute for an audio element doesn't work:
var Audio = React.createClass({
render : function() {
return (
<audio src={this.props.data.songUrl}/>
);
}
});
var Music = React.createClass({
render : function() {
return (
<article className="music">
<article className="musicContent">
<MusicButton data={Data} />
<List />
<Footer />
</article>
</article>
);
}
});
var MusicButton = React.createClass({
getInitialState : function() {
return {
isPlay : true,
count : 0
}
},
musicPlay : function () {
var audio = React.findDOMNode(this.refs.audio);
if(this.state.isPlay) {
audio.play();
this.setState({isPlay: false});
} else {
audio.pause();
this.setState({isPlay: true});
}
},
getBackWardMusic : function() {
this.setState({count: ++this.state.count});
var audio = React.findDOMNode(this.refs.audio);
audio.play();
},
getForwardMusic : function() {
this.setState({count: --this.state.count});
var audio = React.findDOMNode(this.refs.audio);
audio.play();
},
render : function() {
var classString = 'iconMusic icon-pause';
if(this.state.isPlay) {
classString = 'iconMusic icon-pause';
} else {
classString += ' rotate';
}
return (
<header className="musicHeader">
<Audio ref="audio" data={this.props.data[this.state.count]} />
<span onClick={this.getBackWardMusic} className="iconMusic icon-backward"></span>
<span onClick={this.musicPlay} className={classString}></span>
<span onClick={this.getForwardMusic} className="iconMusic icon-forward"></span>
</header>
);
}
});
after changing the source of audio you need to .load() first, before play() plays the new source.
you may like to use .oncanplaythroug = .play()
I don't have a specific answer for your question but I've found that media elements have their own lifecycle that I'm not sure is handled correctly in the React wrappers. The React and media element lifecycles have subtle interactions that are difficult to get right.
E.g., in Chrome, media elements don't release their resources unless you set src='' and if you do this in a React class, followed by a src='something-else' then I suspect the src='' can get optimised away.
To manage a video element, for example, I wrapped it in a React component and attached my own event listeners to the video DOM element to help manage its state and also managed cases like src='' and others by directly manipulating the DOM element in componentWillReceiveProps and componentWillUpdate based on what was changing.
Sorry I've not given a complete answer. It would take a lot of time to completely describe everything but I hope this helps a bit.
I am new to YUI but I veteran of JQuery UI. So this one has me stumped. I cannot get my Datatable to render with the Rest service. I have two version of the code. One that I use the captured JSON object from the service as just a data object and a local datasource. That one works fine. When I attempt to switch to the GET plugin and get it from the service. It just never renders.
My local example:
#main("Play 2.1") {
<script type="text/javascript">
YUI().use("datatable", "datasource-local", "datasource-jsonschema", "datatable-datasource", function (Y) {
var data = [
{"script":{"id":34534,
"scriptText":"234523452345234",
"modifiedDate":1367525647000,
"status":"Reviewed",
"qcDate":1367526006000,
"location":{"id":1},
"orderInfo":{"id":1,
"orderName":"Order Name",
"dealerName":"Dealer Name"}
}},
{"script":{"id":656435,
"scriptText":"36536543636365",
"modifiedDate":1367525646000,
"status":"Reviewed",
"qcDate":1367526017000,
"location":{"id":1},
"orderInfo":{"id":43534534,
"orderName":"Order Name",
"dealerName":"Dealer Name"}
}}
];
var localDataSource = new Y.DataSource.Local({source:data});
localDataSource.plug(Y.Plugin.DataSourceJSONSchema, {
schema:{
resultListLocator:"",
resultFields:[
{
key:"id",
locator:"script.id"
},
{
key:"scriptText",
locator:"script.scriptText"
},
{
key:"modifiedDate",
locator:"script.modifiedDate"
}
]
}
});
var simple = new Y.DataTable({
columns:["id", "scriptText", "modifiedDate"],
summary:"Example Summary",
caption:"Example Caption"
});
simple.plug(Y.Plugin.DataTableDataSource, {
datasource:localDataSource
});
simple.render("#dataGrid");
simple.datasource.load();
});
</script>
<span id="listView">
<div id="dataGrid" style="height: 95%;width: 100%;"></div>
</span>
<div id="dataCheckArea">
<h3>RAW DATA AREA</h3>
<ul>
#records.map {record =>
<li>#record.toString</li>
}
</ul>
</div>
}
My REST Service example:
#main("Welcome to Play 2.1") {
<script type="text/javascript">
YUI().use("datatable", "datasource-get", "datasource-jsonschema", "datatable-datasource", function (Y) {
var dataSource = new Y.DataSource.Get({
source:"http://localhost:9000/reviewRecords?q=query"
});
dataSource.plug(Y.Plugin.DataSourceJSONSchema, {
schema:{
resultListLocator:"",
resultFields:[
{
key:"id",
locator:"script.id"
},
{
key:"scriptText",
locator:"script.scriptText"
},
{
key:"modifiedDate",
locator:"script.modifiedDate"
}
]
}
});
var dataGrid = new Y.DataTable({
columns:["id", "scriptText", "modifiedDate"],
summary:"Example Summary",
caption:"Example Caption"
});
dataGrid.plug(Y.Plugin.DataTableDataSource, { datasource:dataSource });
dataGrid.render("#dataGrid");
dataGrid.datasource.load();
});
</script>
<span id="listView">
<div id="dataGrid" style="height: 95%;width: 100%;"></div>
</span>
** edited because the original submission lost my second code block.
The problem wasn't with my javascript code. The issue was with how I was sending the response. The YUI framework expects that the response will be wrapped in a callback function. When I changed my response to give a JSONP response with the callback it all started working.
YUI.Env.DataSource.callbacks.yui_3_11_0_1_1379097239018_187([
{"script":{"id":34534,
"scriptText":"234523452345234",
"modifiedDate":1367525647000,
"status":"Reviewed",
"qcDate":1367526006000,
"location":{"id":1},
"orderInfo":{"id":1,
"orderName":"Order Name",
"dealerName":"Dealer Name"}
}},
{"script":{"id":656435,
"scriptText":"36536543636365",
"modifiedDate":1367525646000,
"status":"Reviewed",
"qcDate":1367526017000,
"location":{"id":1},
"orderInfo":{"id":43534534,
"orderName":"Order Name",
"dealerName":"Dealer Name"}
}}
])
I did this by using a JSONP call in the method response from Scala/Play 2.1
def reviewRecords(q: String, callback: String) = Action {
val reviewRecords = reviewRecordsService.currentReviewRecords
Ok(new Jsonp(callback, Json.toJson(DataTablesReturnObject(reviewRecords.size, reviewRecords.toArray)))).as("application/json")
}
I am going to edit the title of my original question to include the keywords for Play 2.1 and Scala because this ends up being a little different than a Java response.
Does anyone have an example of sending a geolocation from a mobile phone to a JSF backing bean?
Would like to get the customers address using geolocation? (Will need to convert from geolocation co-ordinates to a drop down list of nearby roads).
Thanks,
D
Not sure if this will help u get started...
This pulls GPS Geolocation Data from Mobile Devices into a Form...
Then do whatever with it from there...
<script type="text/javascript">
function getLocationConstant()
{
if(navigator.geolocation)
{
navigator.geolocation.getCurrentPosition(onGeoSuccess,onGeoError);
} else {
alert("Your browser or device doesn't support Geolocation");
}
}
// If we have a successful location update
function onGeoSuccess(event)
{
document.getElementById("Latitude").value = event.coords.latitude;
document.getElementById("Longitude").value = event.coords.longitude;
}
// If something has gone wrong with the geolocation request
function onGeoError(event)
{
alert("Error code " + event.code + ". " + event.message);
}
</script>
<cfform action="gps2.cfm" method="post">
Latitude: <input type="text" id="Latitude" name="Latitude" value="">
<br><br>
Longitude: <input type="text" id="Longitude" name="Longitude" value="">
<br><br>
<input type="button" value="Get Location" onclick="getLocationConstant()"/>
<br><br>
<input type="submit" value="Add GPS Location" class=small>
</cfform>
View this links please:
https://developers.google.com/maps/documentation/javascript/examples/map-geolocation - Google Developers
https://goo.gl/TD7aiq - JsFiddle
JS:
// Note: This example requires that you consent to location sharing when
// prompted by your browser. If you see the error "The Geolocation service
// failed.", it means you probably did not give permission for the browser to
// locate you.
function initMap() {
var map = new google.maps.Map(document.getElementById('map'), {
center: {lat: -34.397, lng: 150.644},
zoom: 6
});
var infoWindow = new google.maps.InfoWindow({map: map});
// Try HTML5 geolocation.
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(function(position) {
var pos = {
lat: position.coords.latitude,
lng: position.coords.longitude
};
infoWindow.setPosition(pos);
infoWindow.setContent('Location found.');
map.setCenter(pos);
}, function() {
handleLocationError(true, infoWindow, map.getCenter());
});
} else {
// Browser doesn't support Geolocation
handleLocationError(false, infoWindow, map.getCenter());
}
}
function handleLocationError(browserHasGeolocation, infoWindow, pos) {
infoWindow.setPosition(pos);
infoWindow.setContent(browserHasGeolocation ?
'Error: The Geolocation service failed.' :
'Error: Your browser doesn\'t support geolocation.');
}
Using the Javascript you can get the co-ordinates and you can set the backend variable using document.getElementById("id")) in javascript.
Example:
<h:inputText value="{myBean.latitude}" id="latitudeID" />
<!DOCTYPE html>
<html>
<body>
<p>Click the button to get your coordinates.</p>
<button onclick="getLocation()">Try It</button>
<p id="demo"></p>
<script>
var x = document.getElementById("demo");
function getLocation() {
if (navigator.geolocation) {
navigator.geolocation.getCurrentPosition(showPosition);
} else {
x.innerHTML = "Geolocation is not supported by this browser.";
}
}
function showPosition(position) {
x.innerHTML = "Latitude: " + position.coords.latitude +
"<br>Longitude: " + position.coords.longitude;
document.getElementById("formName:latitudeID").value=position.coords.latitude; /* this will set the value in variable */
}
</script>
</body>
</html>