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function initPage() {}
</script><link href="../PRODUCT_PLUGIN/book.css" rel="stylesheet" type="text/css"/><link href="css/s60/style.css" rel="stylesheet" type="text/css" media="all"/></head><body onload="initPage();"><div class="body"><div class="contentLeft prTxt"><h1 class="pageHeading" id="GUID-C4B403C9-FA4D-47E2-821B-53FE7ACC33E3">Creating HTML controls</h1><div>
<p>You can use the following standard HTML controls:</p>
<ul>
<li><p>Push buttons—Perform functions as specified by JavaScript that you associate with the button <code>onclick</code> event.</p></li>
<li><p>Check boxes—Allow users to select options by turning them on and off.</p></li>
<li><p>Radio buttons—Allow users to select options by turning them on and off. Only one radio button can be turned on at a time.</p></li>
<li><p>Menus—Offer users options to choose from.</p></li>
<li><p>Text fields—Allow users to input text. For more information, see <a href="GUID-1666F263-F1CB-4928-B2A7-E518B43983BA.html#GUID-1666F263-F1CB-4928-B2A7-E518B43983BA">Handling text input</a>.</p></li>
<li><p>Hidden controls—Allow you to submit values with a form and to store information between client/server exchanges that would otherwise be lost because HTTP connections are stateless.</p></li>
<li><p>Object controls—Allow you to submit associated values with other controls.</p></li>
</ul>
<p>The HTML elements are mapped to standard S60 components on mobile devices. You can use a cascading style sheet (CSS) to define the appearance of the controls. </p>
<div><h3>To use HTML controls</h3><ol>
<li id="GUID-E6243D93-E862-481F-9E8F-4C9506A45502"><a name="GUID-E6243D93-E862-481F-9E8F-4C9506A45502"><!----></a><p>Use the HTML <code>input</code> element to create screen controls, such as text fields, check boxes, and buttons.</p><pre class="codeblock"><div class="login_container">
<table cellspacing="0">
<tr>
<th>Login</th>
</tr>
<tr>
<td>Please login using you Twitter credentials...</td>
</tr>
<tr>
<td class="table_subtitle">Username</td>
</tr>
<tr>
<td class="input_container">
<input id="login_username" type="text">
</td>
</tr>
<tr>
<td class="table_subtitle">Password</td>
</tr>
<tr>
<td class="input_container">
<input id="login_password" type="password">
</td>
</tr>
<tr>
<td>
<input id="login_remember_me" type="checkbox"><label for="login_remember_me">Remember Me</label>
</td>
</tr>
<tr>
<td class="button_container"><a id="login_button" href="#" class="button">Login</a></td>
</tr>
</table>
</div></pre><div class="figure" id="GUID-5BC7985B-2F1C-47B9-9E74-B1B7A825454D"><img src="GUID-38EF5741-0A6A-4A55-BDE5-4DB3F686D21E_d0e3492_href.jpg"/><p class="figure-title"><strong>Figure: </strong>STEW Login view</p></div></li>
<li id="GUID-FD577FEC-1850-4AB9-A713-0B012223710C"><a name="GUID-FD577FEC-1850-4AB9-A713-0B012223710C"><!----></a><p>Create JavaScript to implement the functionality of the controls:</p><pre class="codeblock">function LoginScreen() {
// Get the login button element and assign an 'onclick' event to it.
var self = this;
var loginButton = document.getElementById( "login_button" );
loginButton.onclick = function() {
self.onLoginClicked();
};
// Get all the UI elements that we can interact with.
this.tbUsername = document.getElementById( "login_username" );
this.tbPassword = document.getElementById( "login_password" );
this.cbRememberMe = document.getElementById( "login_remember_me" );
}
LoginScreen.prototype.onLoginClicked = function() {
var username = this.tbUsername.value;
var password = this.tbPassword.value;
var rememberMe = this.cbRememberMe.checked;
// Save the data to the storage if the user checked "Remember Me".
widget.setPreferenceForKey( rememberMe.toString(), LoginScreen.KEY_REMEMBER_ME );
// If "Remember Me" is unchecked, the username and password are cleared because
// default values for username and password values are null.
widget.setPreferenceForKey( rememberMe ? username : null, LoginScreen.KEY_USERNAME );
// REMEMBER: Never store passwords uncoded. See encryption algorithms on
// how to encode the password before saving it.
widget.setPreferenceForKey( rememberMe ? password : null, LoginScreen.KEY_PASSWORD );
// Remember the username and password.
twitterService.setCredentials( username, password );
// Check which page is the startup page.
var startupPage = widget.preferenceForKey( SettingsScreen.KEY_STARTUP_PAGE );
if ( startupPage == SettingsScreen.SEARCH_PAGE ) {
widgetMenu.activate( Menu.SEARCH_SCREEN );
} else {
widgetMenu.activate( Menu.UPDATE_STATUS_SCREEN );
}
}</pre></li>
</ol></div>
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