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Maker Code-39 in C# LAYING OUT THE FOUNDATIONS

CHAPTER 2 LAYING OUT THE FOUNDATIONS
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In the remainder of this chapter, you will Create the main web page and the header template. Implement the foundations of the error-handling system in HatShop. Create the HatShop database.
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Building the First Page
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The main page in HatShop will be generated by the files index.php and index.tpl. You ll write the index.tpl Smarty template with placeholders for the three major parts of the site the header, the table of departments, and the page contents cell. Implement the main page in the following exercise, and we ll discuss the details in the How It Works section thereafter.
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Exercise: Implementing the First Page and Its Header
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1. Create a new folder named images inside the hatshop folder. 2. Copy the files in images_folder/images from the Source Code/Download of the book (which you can find at the book details page on http://www.apress.com or http://www.cristiandarie.ro) to hatshop/images (the folder you just created). 3. Create a file named site.conf in the hatshop/include/configs folder (used by the Smarty templates engine), and add the following line to it: site_title = "HatShop : Demo Site for Beginning PHP and PosgreSQL E-Commerce" 4. Create a file named index.tpl in hatshop/presentation/templates, and add the following code to it: {* smarty *} {config_load file="site.conf"} <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <html> <head> <title>{#site_title#}</title> <link href="hatshop.css" type="text/css" rel="stylesheet" /> </head> <body> <div> <div class="left_box"> Place list of departments here </div> {include file="header.tpl"} <div id="content"> Place contents here
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CHAPTER 2 LAYING OUT THE FOUNDATIONS
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</div> </div> </body> </html> 5. Create a template file named header.tpl in hatshop/presentation/templates, and add the following contents to it: <div id="header"> <a href="index.php"> <img src="images/title.png" alt="Site title" /> </a> </div> 6. Create a file named hatshop.css in the root folder of your project (hatshop), and write this code: body { font-family: tahoma, verdana, arial; font-size: 11px; margin: 0px; padding: 5px; text-align: center; } body div { margin: 0px; padding: 5px; text-align: left; } .left_box { margin: 0px 15px 15px 0px; padding: 2px; width: 170px; } img { border: 0; } #header { left: 194px; margin: 0px; padding: 0px; position: absolute; text-align: right; top: 10px; width: 570px;
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CHAPTER 2 LAYING OUT THE FOUNDATIONS
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} #content { left: 194px; margin: 0px; padding: 0px 0px 10px 10px; position: absolute; top: 110px; width: 558px; } 7. Add a file named config.php to the hatshop/include folder, with the following contents: < php // SITE_ROOT contains the full path to the hatshop folder define('SITE_ROOT', dirname(dirname(__FILE__))); // Application directories define('PRESENTATION_DIR', SITE_ROOT . '/presentation/'); define('BUSINESS_DIR', SITE_ROOT . '/business/'); // Settings needed to configure the Smarty template engine define('SMARTY_DIR', SITE_ROOT . '/libs/smarty/'); define('TEMPLATE_DIR', PRESENTATION_DIR . '/templates'); define('COMPILE_DIR', PRESENTATION_DIR . '/templates_c'); define('CONFIG_DIR', SITE_ROOT . '/include/configs'); > Before moving on, let s see what happens here. dirname(__FILE__) returns the parent directory of the current file; naturally, dirname(dirname(__FILE__)) returns the parent of the current file s directory. This way our SITE_ROOT constant will be set to the full path of hatshop. With the help of the SITE_ROOT constant, we set up absolute paths of Smarty folders. 8. Create a file named app_top.php in the hatshop/include folder, and add the following contents to it: < php // Include utility files require_once 'include/config.php'; // Load the page template require_once PRESENTATION_DIR . 'page.php'; > This file (app_top.php) will be included at the top of the main web pages to perform the necessary initializations. 9. Create a file named page.php in the hatshop/presentation folder, and add the following contents to it: < php // Reference Smarty library require_once SMARTY_DIR . 'Smarty.class.php';
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CHAPTER 2 LAYING OUT THE FOUNDATIONS
/* Class that extends Smarty, used to process and display Smarty files */ class Page extends Smarty { // Class constructor public function __construct() { // Call Smarty's constructor parent::Smarty(); // Change the default template directories $this->template_dir = TEMPLATE_DIR; $this->compile_dir = COMPILE_DIR; $this->config_dir = CONFIG_DIR; } } > In page.php, you extend the Smarty class with a wrapper class named Page, which changes Smarty s default behavior. The Page class configures in its constructor the Smarty folders you created earlier.
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