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Resetting select menu
[7Replies]
- 28-Jun-2012 11:35 PM
- Forum: Using jQuery
Dear collective wisdom,
I have the following code to reset select menu controls:

// reset menu controls; TODO - need to loop through all categories
$('#btn-reset').live('click', function() {

var myselect = $("select#useOfColor");
myselect[0].selectedIndex = 0;
myselect.selectmenu("refresh");

myselect = $("select#plantVariety");
myselect[0].selectedIndex = 0;
myselect.selectmenu("refresh");

myselect = $("select#design");
myselect[0].selectedIndex = 0;
myselect.selectmenu("refresh");

myselect = $("select#maintenance");
myselect[0].selectedIndex = 0;
myselect.selectmenu("refresh");

myselect = $("select#environmentalStewardship");
myselect[0].selectedIndex = 0;
myselect.selectmenu("refresh");

});

However, this list will only grow. Is there a more elegant method for making sure that all desired select menus in my web page will get cleared without having to add each specific one to this code?

Danke Schoen!

Greg--

Problem with SQLite call
[2Replies]
- 27-Jun-2012 11:36 PM
- Forum: Using jQuery
I have similar functions in my app that work just swimmingly. The thing that sets this apart is that I am passing a variable to the function to use as parameter in the WHERE clause of a SELECT.

The function is as follows:

function LoadSite(id) {
if (!window.openDatabase) {
alert('Databases are not supported in this browser.');
return;
}

var selectStatement = 'SELECT * FROM site WHERE id = ?';

console.log('Select me:' + selectStatement);
console.log('Session id:' + id);
// this next section will select all the content from the site table as
// queried by the passed variable

db.transaction(function(transaction) { // ****!!!!****

transaction.executeSql(selectStatement, [id], function(transaction,
result) {
if (result != null && result.rows != null) {

for ( var i = 0; i < result.rows.length; i++) {
// load row into object
var row = result.rows.item(i);
var location = row.id + ' ' + row.site_id + ' ' +
row.address + ' ' + row.city + ' ' + row.state + ' ' + row.zip;

$('#lbWhere').append(location);

console.log(location);
}

}
}, errorHandler);
}, errorHandler, nullHandler);
return;
};

The issue is that I am getting an "Uncaught TypeError: Cannot call method 'transaction' of undefined..." (at the line with the ****!!!!**** above, where I have the closure db.transaction(function(transaction)) when the application fires in the console output. I assume that something is wrong with my SELECT statement, but for the life of me, I cannot figure it out. All documentation on use of parameters in SQLite queries are for everything but SELECT, but I figured I could use the syntax of a DELETE with a WHERE clause just as easily.

Any ideas as to why this is choking?

Thanks very much in advance!

Greg--

Problems with Uncaught TypeError
[4Replies]
- 08-Jun-2012 10:46 PM
- Forum: jQuery Mobile
Dear Collective Wisdom,
Not sure if this is specific to jQuery mobile, but I am writing an HTML5/Phonegap/jQuery app and am having some strange behavior. I am doing all my debugging in Chrome using the Developer Tools.

One feature of my app is that I am grabbing a very large dataset via a JSONP call to a remote server (which works fine) so that I can preload these data into my app.

Here is my code:

var json = (function() {

var url = "http://www.inserturl.org/app/gardens.php?output=json&callback=?";
var json = [];

$.ajax({
'async' : false,
'global' : false,
'url' : url,
'dataType' : "jsonp",
'success' : function(data) {
json = data;
// alert("Success!");
console.log('JSON ' + json[2].garden_id);
LoadJsonObject(json);
}
});

})();

json(); // run the function to initialize json object

// do stuff with the returned data from success closure defined above
function LoadJsonObject(val) {

var garden_id;
var address;
var city;
var state;
var zip;

garden_id = val[2].garden_id;
address = val[2].address.address
city = val[2].address.city
state = val[2].address.state
zip = val[2].address.zip
console.log('GARDEN info: ' + garden_id + ' ' + address + ' ' + city + ' ' + state + ' ' + zip)
//LoadDb(garden_id,address,city,state,zip)

};

When the Web page initially loads, I get all the requested JSON data loaded into my json variable just fine. Also, when I comment out the call to initialize the variable json(); i also get the data as expected. However, I want to load the json object from a function that would initialize the json variable and then grab the object from the ajax success closure and then do some stuff with it (in particular, insert it into an SQLite db). I cannot figure out how to successfully do this, since when I try this, my call to initialize the json variable, json(); is throwing an error of "Uncaught TypeError: Property 'json' of object [object Window] is not a function."

According to the Resources in Developer Tools, all my js files are loading just fine, except for the above error and another error that is similar. Here are the js files, in order of loading:
Here is a list of them in the order being loaded:

<script type="text/javascript" charset="utf-8" src="js/cordova-1.7.0rc1.js"></script>
<script type='text/javascript' src='js/jquery-1.6.4.js'></script>
<script type='text/javascript' src="js/jquery.validate.min.js"></script>
<script type='text/javascript' src="js/jquery.mobile-1.0.1.js"></script>
<script type='text/javascript' src="js/jquery.json-2.3.js"></script>

<script type='text/javascript' src='js/evaluate.it.db.js'></script>

The only other errors being reported outside of the js errors are that two of my CSS files are not being seen under my www/assets root directory.

Any suggestions?

Thanks very much in advance!

Greg--

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