From dd02492f08248bf9b53a20b54a3d49a9f78fc0ad Mon Sep 17 00:00:00 2001
From: xue <>
Date: Wed, 29 Aug 2007 19:57:50 +0000
Subject: finished TCaptcha.

---
 .../protected/pages/Controls/Captcha.page          | 39 ++++++++++++++++++++++
 .../pages/Controls/Samples/TCaptcha/Home.page      | 32 ++++++++++++++++++
 .../pages/Controls/Samples/TCaptcha/Home.php       | 27 +++++++++++++++
 .../protected/pages/Controls/Standard.page         |  4 +++
 .../pages/GettingStarted/NewFeatures.page          |  2 +-
 5 files changed, 103 insertions(+), 1 deletion(-)
 create mode 100644 demos/quickstart/protected/pages/Controls/Captcha.page
 create mode 100644 demos/quickstart/protected/pages/Controls/Samples/TCaptcha/Home.page
 create mode 100644 demos/quickstart/protected/pages/Controls/Samples/TCaptcha/Home.php

(limited to 'demos')

diff --git a/demos/quickstart/protected/pages/Controls/Captcha.page b/demos/quickstart/protected/pages/Controls/Captcha.page
new file mode 100644
index 00000000..244a3adc
--- /dev/null
+++ b/demos/quickstart/protected/pages/Controls/Captcha.page
@@ -0,0 +1,39 @@
+<com:TContent ID="body" >
+
+<h1>TCaptcha</h1>
+<com:DocLink ClassPath="System.Web.UI.WebControls.TCaptcha" />
+
+<p>
+<tt>TCaptcha</tt> displays a <a href="http://en.wikipedia.org/wiki/Captcha">CAPTCHA</a> that can be used to determine if the input is entered by a real user instead of some program. <tt>TCaptcha</tt> displays a token (a string consisting of alphanumeric characters) as an image and the user is expected to repeat the token in a text box. The token image is generated in a way such that it can be recognized by a human being, but not a program.
+</p>
+
+<p>
+To use <tt>TCaptcha</tt>, you must enable the PHP GD2 extension with TrueType font support. Unlike other CAPTCHA scripts, <tt>TCaptcha</tt> does not need session or cookie.
+</p>
+
+<p>
+The token generated by <tt>TCaptcha</tt> can be configured in several ways. To specify the length of characters in the token, set <tt>MinTokenLength</tt> and <tt>MaxTokenLength</tt>. To use case-insensitive token comparison and generate upper-case-only token, set <tt>CaseSensitive</tt> to false. More advanced users can try to set <tt>TokenAlphabet</tt> to specify which characters may appear in the generated tokens.
+</p>
+
+<p>
+To specify the appearance of the generated token image, set <tt>TokenImageTheme</tt> to be an integer between 0 and 31. You may try the following example to see how this value affects the generated token image. The size of the generated token image is determined by <tt>TokenFontSize</tt>. In particular, the image width is proportional to the font size. You may also set <tt>Width</tt> to scale the generated image to your desired size, but the scaled image may not look good.
+</p>
+
+<p>
+Upon postback, user input can be validated by calling the method <tt>TCaptcha.validate()</tt>. More easily, you can use a <tt>TCaptchaValidator</tt> to automate the validation work for you. The <tt>TCaptchaValidator</tt> has the additional benefit of being able to validate the user input on the client-side. By default, a generated token will remain unchanged during postbacks. A new token can be generated by calling <tt>TCaptcha.regenerateToken()</tt> manually.
+</p>
+
+<p>
+The following template shows a typical use of the <tt>TCaptcha</tt> control:
+</p>
+<com:TTextHighlighter Language="prado" CssClass="source">
+&lt;com:TCaptcha ID="Captcha" />
+&lt;com:TTextBox ID="Input" />
+&lt;com:TCaptchaValidator CaptchaControl="Captcha"
+                          ControlToValidate="Input"
+                          ErrorMessage="You are challenged!" />
+</com:TTextHighlighter>
+
+<com:RunBar PagePath="Controls.Samples.TCaptcha.Home" />
+
+<div class="last-modified">$Id$</div></com:TContent>
\ No newline at end of file
diff --git a/demos/quickstart/protected/pages/Controls/Samples/TCaptcha/Home.page b/demos/quickstart/protected/pages/Controls/Samples/TCaptcha/Home.page
new file mode 100644
index 00000000..f47583e9
--- /dev/null
+++ b/demos/quickstart/protected/pages/Controls/Samples/TCaptcha/Home.page
@@ -0,0 +1,32 @@
+<com:TContent ID="body">
+<h1>TCaptcha Samples</h1>
+
+<h2>Validating CAPTCHA</h2>
+<com:TCaptcha ID="Captcha" TokenImageTheme="5"/>
+<com:TTextBox ID="Input" />
+<com:TButton Text="Regenerate" OnClick="regenerateToken" CausesValidation="false" />
+<com:TButton Id="SubmitButton" Text="Submit" OnClick="buttonClicked" />
+<com:TCaptchaValidator CaptchaControl="Captcha" ControlToValidate="Input" Text="error" />
+
+<h2>Different Themes of TCaptcha</h2>
+
+<table border="1">
+<tr>
+<th>Theme</th><th>Image</th>
+</tr>
+<com:TRepeater ID="CaptchaList">
+  <prop:ItemTemplate>
+<tr>
+  <td>
+  <%# $this->Data %>
+  </td>
+  <td>
+  <com:TCaptcha TokenImageTheme="<%# $this->Data %>" MaxTokenLength="5"/>
+  </td>
+</tr>
+  </prop:ItemTemplate>
+</com:TRepeater>
+</table>
+
+<div class="last-modified">$Id$</div>
+</com:TContent>
\ No newline at end of file
diff --git a/demos/quickstart/protected/pages/Controls/Samples/TCaptcha/Home.php b/demos/quickstart/protected/pages/Controls/Samples/TCaptcha/Home.php
new file mode 100644
index 00000000..4d54ce87
--- /dev/null
+++ b/demos/quickstart/protected/pages/Controls/Samples/TCaptcha/Home.php
@@ -0,0 +1,27 @@
+<?php
+
+class Home extends TPage
+{
+	public function onInit($param)
+	{
+		if(!$this->IsPostBack)
+		{
+			$this->CaptchaList->DataSource=range(0,31);
+			$this->CaptchaList->dataBind();
+		}
+	}
+
+	public function regenerateToken($sender,$param)
+	{
+		$this->Captcha->regenerateToken();
+		$this->SubmitButton->Text="Submit";
+	}
+
+	public function buttonClicked($sender,$param)
+	{
+		if($this->IsValid)
+			$sender->Text="You passed!";
+	}
+}
+
+?>
\ No newline at end of file
diff --git a/demos/quickstart/protected/pages/Controls/Standard.page b/demos/quickstart/protected/pages/Controls/Standard.page
index d481525c..7d961a84 100644
--- a/demos/quickstart/protected/pages/Controls/Standard.page
+++ b/demos/quickstart/protected/pages/Controls/Standard.page
@@ -7,6 +7,10 @@
   <a href="?page=Controls.Button">TButton</a> represents a click button on a Web page. It is mainly used to trigger page postback.
   </li>
 
+  <li>
+  <a href="?page=Controls.Captcha">TCaptcha</a> displays a CAPTCHA to keep spammers from signing up for certain accounts online.
+  </li>
+
   <li>
   <a href="?page=Controls.CheckBox">TCheckBox</a> represents a checkbox on a Web page. It can be used to collect two-state user input.
   </li>
diff --git a/demos/quickstart/protected/pages/GettingStarted/NewFeatures.page b/demos/quickstart/protected/pages/GettingStarted/NewFeatures.page
index a5136d72..53b516cc 100644
--- a/demos/quickstart/protected/pages/GettingStarted/NewFeatures.page
+++ b/demos/quickstart/protected/pages/GettingStarted/NewFeatures.page
@@ -10,7 +10,7 @@ This page summarizes the main new features that are introduced in each PRADO rel
 <ul>
 <li>Added a new control <a href="?page=Controls.TabPanel">TTabPanel</a> that displays tabbed views.</li>
 <li>Added a new control <a href="?page=Controls.Keyboard">TKeyboard</a> that displays a virtual keyboard for text input.</li>
-<li>Added a new module TCacheHttpSession that stores session data using a cache module to improve the session performance.</li>
+<li>Added a new control <a href="?page=Controls.Captcha">TCaptcha</a> that displays a CAPTCHA to keep spammers from signing up for certain accounts online. A related validator <tt>TCaptchaValidator</tt> is also implemented.</li>
 <li>Added Oracle DB support to Active Record</li>
 </ul>
 
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