I want to use an observable object within a ListView in the Windows 8 RT (Developer Preview from BUILD 2011) (using JavaScript).
The code below seems like it should work. It has a simple template for displaying a title and a description of each object in the HTML and a basic use of the WinJS.UI.Listview component.
I expect to see a list of objects, but always see the "wait spinner" when the list contains observables.
Experimentally, I've noticed that if the code doesn't convert the entire list (all but 3) to observables, then the list will show up. From doing some debugging, it would appear that it's somehow timing related and that the WinJS framework miscounts and fails to render the ListView entirely (as some of the objects are "pending") for some reason (the miscount confusion happens deep in a call to realizeItems in the ScrollView code). If I comment out the enableFirstChanceException function call, it fails while comparing two objects (but I don't know if it's relevant) in the function itemChanged (circular reference in value argument not supported).
Any idea on how to make this work with observable objects?
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=1024, height=768" />
<title>WinWebApp1</title>
<!-- WinJS references -->
<link rel="stylesheet" href="/winjs/css/ui-dark.css" />
<script type="text/javascript" src="/WinJS/js/base.js"></script>
<script type="text/javascript" src="/WinJS/js/ui.js"></script>
<script type="text/javascript" src="/WinJS/js/binding.js"></script>
<script type="text/javascript" src="/WinJS/js/controls.js"></script>
<script type="text/javascript" src="/WinJS/js/res.js"></script>
<script type="text/javascript" src="/WinJS/js/animations.js"></script>
<script type="text/javascript" src="/WinJS/js/uicollections.js"></script>
<script type="text/javascript" src="/WinJS/js/wwaapp.js"></script>
<!-- WinWebApp1 references -->
<link rel="stylesheet" href="/css/default.css" />
<script src="/js/default.js"></script>
</head>
<body>
<div id="itemTemplate" data-win-control="WinJS.Binding.Template" >
<div class="itemContainer">
<!-- Displays the "title" field. -->
<div class="itemTitle" data-win-bind="innerText: title">
</div>
<!-- Displays the "description" field. -->
<div class="itemDescription" data-win-bind="innerText: description">
</div>
</div>
</div>
<div data-win-control="WinJS.UI.ViewBox">
<div class="fixed-layout">
<div id="basicListView" data-win-control="WinJS.UI.ListView" data-win-options="{itemRenderer: itemTemplate}">
</div>
</div>
</div>
</body>
</html>
And the JavaScript:
(function () {
'use strict';
// Uncomment the following line to enable first chance exceptions.
//Debug.enableFirstChanceException(true);
var myData = [
{ title: "Banana", description: "Banana Frozen Yogurt"},
{ title: "Orange", description: "Orange Sherbet"},
{ title: "Vanilla", description: "Vanilla Ice Cream"},
{ title: "Mint", description: "Mint Gelato"},
{ title: "Strawberry", description: "Strawberry Sorbet"},
{ title: "Kiwi", description: "Kiwi Sorbet" }
];
// this works:
//var myDataSource = new WinJS.UI.ArrayDataSource(myData);
// this does not:
for (var i = 0; i < myData.length ; i++) {
myData[i] = WinJS.Binding.as(myData[i]);
}
var myDataSource = new WinJS.UI.ArrayDataSource(myData);
document.addEventListener("DOMContentLoaded", function (e) {
WinJS.UI.processAll()
.then(function () {
var basicListView = WinJS.UI.getControl(document.getElementById("basicListView"));
basicListView.dataSource = myDataSource;
// when the observable works correctly, this should work (and live change the list)
//setTimeout(function () {
// basicListView.refresh();
// myData[0].title = "Yellow Banana";
// myData[5].title = "Kiwisicle";
//}, 3000);
});
});
WinJS.Application.start();
})();
Related
I have a problem when initiating jqxButton inside jqxWindow:
Expected: When I click Add button, the Confirm button caption will be set to "Add", otherwise when I click Edit button.
Problem: The Confirm button caption is set to proper button at the first time I clicked, but then the caption will not changed.
Note: The problem raised if i set window property autoOpen: false.
This problem raised when I use jQWidgets V5.1.0.
When I use jQWidgets v4.3.0, this problem does not happen.
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="description" content="" />
<title></title>
<link rel="stylesheet" href="../../jqwidgets/styles/jqx.base.css" type="text/css" />
<script type="text/javascript" src="../../scripts/jquery-1.11.1.min.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxcore.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxwindow.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxbuttons.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxscrollbar.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxpanel.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxtabs.js"></script>
<script type="text/javascript" src="../../jqwidgets/jqxcheckbox.js"></script>
<script type="text/javascript" src="../../scripts/demos.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$('#btnAdd').click(function () {
$('#window').jqxWindow('open');
$("#confirm").jqxButton({ value: "Add" });
});
$('#btnEdit').click(function () {
$('#window').jqxWindow('open');
$("#confirm").jqxButton({ value: "Edit" });
});
var jqxWidget = $('#jqxWidget');
var offset = jqxWidget.offset();
$('#window').jqxWindow({
autoOpen: false,
minWidth: 200,
height: 300,
width: 500,
initContent: function ()
{
$("#confirm").jqxButton();
}
});
});
</script>
</head>
<body class='default'>
<div id="jqxWidget">
<div style="float: left;">
<div>
<input type="button" value="Add" id="btnAdd" />
<input type="button" value="Edit" id="btnEdit" />
</div>
</div>
<div id="mainDemoContainer">
<div id="window">
<div id="windowContent">
<input type="button" id="confirm" />
</div>
</div>
</div>
</div>
</body>
</html>
This comes late of course, but does the change in the caption have to occur through the jqxButtons properties only? After testing your code I came to following:
$('#btnAdd').click(function () {
$('#window').jqxWindow('open');
$("#confirm").attr('value', "Add"); // Works !
//$("#confirm").jqxButton('val', "New Value"); // Does not work the first time only
//$('#confirm').jqxButton({ value: "Button" }); // uncaught exception: Invalid property: value
});
$('#btnEdit').click(function () {
$('#window').jqxWindow('open');
$("#confirm").attr('value', 'Edit');
});
May this answer help others who meet this issue.
I am in process of learning so kindly help me to do how the retrieval of table from mysql in ibm mobile first by just clicking an button from my html page. I have tried but not working help please
<!DOCTYPE HTML>
<html>
<head>
<meta charset="UTF-8">
<title>vikdemodb</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=0">
<!--
<link rel="shortcut icon" href="images/favicon.png">
<link rel="apple-touch-icon" href="images/apple-touch-icon.png">
-->
<link rel="stylesheet" href="css/main.css">
<script>window.$ = window.jQuery = WLJQ;</script>
</head>
<body style="display: none;">
<!--application UI goes here-->
<div id="header">
<h1>database Demo</h1>
</div>
<div id="wrapper">
<input type="button" id="databasecon" value="click me to get data from db" /><br />
</div>
<script src="js/initOptions.js"></script>
<script src="js/main.js"></script>
<script src="js/messages.js"></script>
</body>
</html>
My main.js
function wlCommonInit(){
$('#databasecon').click(loadSQLRecords);
}
function loadSQLRecords(){
var invocationData = {
adapter : 'vikadap',
procedure : 'getstudinfo',
parameters : []
};
WL.Client.invokeProcedure(invocationData,{
onSuccess : loadSQLQuerySuccess,
onFailure : loadSQLQueryFailure
});
}
function loadSQLQuerySuccess(result){
window.alert("success");
console.log("Retrieve success" + result);
console.log(result.invocationResult.resultSet);
}
function loadSQLQueryFailure(result){
WL.Logger.error("Retrieve failure");
}
You have a button in your HTML:
<input type="button" id="databasecon" value="click me to get data from db" />
You handle this button in wlCommonInit():
$('#databasecon').click(loadSQLRecords);
In loadSQLRecords() you call an adapter procedure to retrieve data from the database. If this operation succeeds then it calls the loadSQLQuerySuccess callback function.
It is this function that you are supposed to handle the display of the response from the backend (your database). But what are you doing? You only print to the console the response. You do not handle at all, displaying it in the application - in the HTML.
So in your HTML, you need to prepare a place holder that you will append the result into. For example: <table id="mytable"></table>
Then you need to populate the table with the data...
So in loadSQLQuerySuccess, you could for example do the following... this is where you need to learn HTML and JavaScript to accomplish what YOU want it to look like:
function loadFeedsSuccess(result) {
if (result.invocationResult.resultSet.length > 0)
displayFeeds(result.invocationResult.resultSet);
else
loadFeedsFailure();
}
function loadFeedsFailure() {
alert ("failure");
}
function displayFeeds(result) {
for (var i = 0; i < result.length; i++) {
$("#mytable").append("<tr><td>" + result[i].firstName + "</td></tr>");
$("#mytable").append("<tr><td>" + result[i].lastName + "</td></tr>");
}
}
Note that you need to create your own code in the for loop to make it look like how you want it to look, and of course append your own properties from the database, instead of "firstName" and "lastName".
I am having trouble getting a reference to the dijit form widget when the form contains a DateTextBox. The code snippet below demonstrates the problem. When executed, the alert box says "undefined". However, if I get rid of <input ... id="dateTextBox"... />, I am able to get a reference to the form widget.
<!DOCTYPE HTML>
<html lang="en">
<head>
<meta charset="utf-8">
<title></title>
<link rel="stylesheet" type="text/css" href="//ajax.googleapis.com/ajax/libs/dojo/1.9.1/dijit/themes/claro/claro.css" media="screen">
<!-- load dojo and provide config via data attribute -->
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/dojo/1.9.1/dojo/dojo.js"
data-dojo-config="async: true, parseOnLoad: true">
</script>
<script type="text/javascript">
require(["dijit/form/TextBox", "dijit/form/DateTextBox"]);
</script>
<script type="text/javascript">
require(["dojo/parser", "dijit/registry", "dijit/form/Form", "dojo/domReady!"],
function(parser, registry) {
parser.parse();
alert(registry.byId("frm_test"));
});
</script>
</head>
<body class="claro">
<div data-dojo-type="dijit/form/Form" id="frm_test" encType="multipart/form-data" action="" method="">
<input type="text" id="textBox" name="textBox" data-dojo-type="dijit/form/TextBox" />
<input type="text" id="dateTextBox" name="dateTextBox" data-dojo-type="dijit/form/DateTextBox" />
</div>
</body>
</html>
I'd recommend wrapping the registry.byId into a ready call.
Keep parse onLoad: true, remove
require(["dijit/form/TextBox", "dijit/form/DateTextBox"]);
as the parser will auto require (when dojo>= 1.8) and use the following:
<script type="text/javascript">
require(["dojo/ready", "dijit/registry", "dojo/domReady!"],
function(ready, registry) {
// by default the prioirty of this ready call will be after the
// ready call used to parse when parseOnLoad is true
ready(function() {
alert(registry.byId("frm_test"));
});
});
</script>
Note that waiting for dojo/domReady! to fire is often not sufficient
when working with widgets. Many widgets shouldn’t be initialized or
accessed until the following modules load and execute:
dojo/uacss
dijit/hccss
dojo/parser
Thus when working with widgets you should generally put your code
inside of a dojo/ready() callback
http://dojotoolkit.org/reference-guide/1.9/dojo/domReady.html
http://dojotoolkit.org/reference-guide/1.9/dojo/ready.html#dojo-ready
I have been trying all day to "catch" or assign/bind to the chosen state and assign it to a variable called "text" so that I can use it in yet another API call for the other drop down box "Products".
I figured I must just be missing something and was hoping for a little help.
Thanks.
<html dir="ltr" lang="en-US">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, minimum-scale=1.0, maximum-scale=1.0" />
<title>Legis Connect</title>
<script type="text/javascript" src="js/jquery-1.7.2.min.js"></script>
<link rel="stylesheet" href="css/kendo.common.min.css">
<link rel="stylesheet" href="css/kendo.black.min.css">
<link rel="stylesheet" href="css/kendo.mobile.all.min.css">
<link rel="stylesheet" href="css/kendo.dataviz.min.css">
<script src="js/kendo.all.min.js"></script>
</head>
<body>
<div class="k-widget k-header">
<span class="infoHead">Information</span>
<p>
<input id="state" placeholder="Select State..." />
</p>
<p>
<input id="products"/>
</p>
<script>
$(document).ready(function() {
$("#state").kendoDropDownList({
// optionLabel: "Select State...",
dataTextField: "name",
dataValueField: "abbreviation",
dataSource: {
transport: {
read: {
url: "http://openstates.org/api/v1/metadata/?apikey=????????",
dataType: "jsonp"
}
}
}
});
// change: function(test){
// var text = this.value()
var states=$("#state").data("kendoDropDownList");
states.bind("change", function(e) {
var text = (this.value())
alert (text)
});
$("#products").kendoDropDownList({
optionLabel: "Select product...",
dataTextField: "legislature_name",
dataValueField: "legislature_name",
dataSource: {
transport: {
read: {
url: "http://openstates.org/api/v1/metadata/"+text+"/?apikey=???????????????????",
dataType: "jsonp"
}
}
}
})
$("#products").data("kendoDropDownList");
});
</script>
</div>
</body>
</html>
It appears that you're trying to create cascading dropdowns; when you choose a value in the states dropdown list, it loads the products available for the selected state. There's a helpful article from Telerik on how to do that with the combo box controls (works the same from dropdown lists): http://docs.kendoui.com/getting-started/web/combobox/cascading. There's actually a property called cascadeFrom which you can set on the products dropdown list to tell it to cascade from the states dropdown list. Hope that helps!
I have downloaded dojo build, now I have an doubt, in the below example code, I am using "dojo.js.uncompressed.js" as a start of source file, is it right? Just I want to display a button in the web page. Which one is the start file? in dojo library.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html dir="ltr">
<head>
<style type="text/css">
body, html { font-family:helvetica,arial,sans-serif; font-size:90%; }
</style>
<script src="../dojo/lib/dojo/dojo.js.uncompressed.js"
djConfig="parseOnLoad: true">
</script>
<script type="text/javascript">
dojo.require("dijit.form.Button");
dojo.addOnLoad(function() {
// Create a button programmatically:
var button = new dijit.form.Button({
label: "Click me!",
onClick: function() {
// Do something:
dojo.byId("result1").innerHTML += "Thank you! ";
}
},
"progButtonNode");
});
</script>
<link rel="stylesheet" type="text/css" href="../dojo/lib/dijit/themes/claro/claro.css" />
</head>
<body class=" claro ">
<button id="progButtonNode" type="button">
</button>
<div id="result1">
</div>
<!-- NOTE: the following script tag is not intended for usage in real
world!! it is part of the CodeGlass and you should just remove it when
you use the code -->
<script type="text/javascript">
dojo.addOnLoad(function() {
if (document.pub) {
document.pub();
}
});
</script>
</body>
</html>
dojo (and any js file) should be put next to your html files so that it is served by the server. Then you don't have to relate to long relative paths