From 3d85de0c957c614daa95d78cb4111a44afde2b41 Mon Sep 17 00:00:00 2001
From: Mikkel Breum <mikkel@wpkitchen.com>
Date: Sun, 7 Apr 2013 23:14:44 +0200
Subject: [PATCH] Restricted scripts and styles to load only on plugin settings
 page if it is enabled.

If the Settings page has been activated, the scripts and styles will only be loaded on the settings page. If not, they will be loaded for all admin pages (like before this commit)

Also added the __FILE__ magic constant as a second parameter to the admin_enqueue_style and admin_enqueue_script, the user no longer needs to change 'plugin-name'. This also makes the code more robust.
---
 plugin-boilerplate/plugin.php | 47 ++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 4 deletions(-)

diff --git a/plugin-boilerplate/plugin.php b/plugin-boilerplate/plugin.php
index 59c0cd9..402dade 100644
--- a/plugin-boilerplate/plugin.php
+++ b/plugin-boilerplate/plugin.php
@@ -46,6 +46,9 @@ class PluginName {
 	  # add_action('admin_menu', array( $this, 'plugin_admin_menu' ) );
 
 		// Register admin styles and scripts
+		// If the Settings page has been activated (above), the scripts and styles
+		// will only be loaded on the settings page. If not, they will be loaded for all
+		// admin pages. 
 		add_action( 'admin_enqueue_scripts', array( $this, 'register_admin_styles' ) );
 		add_action( 'admin_enqueue_scripts', array( $this, 'register_admin_scripts' ) );
 
@@ -119,18 +122,53 @@ class PluginName {
 	 */
 	public function register_admin_styles() {
 
-		// TODO:	Change 'plugin-name' to the name of your plugin
-		wp_enqueue_style( 'plugin-name-admin-styles', plugins_url( 'plugin-name/css/admin.css' ) );
+		/*
+		 * Check if the plugin has registered a settings page
+		 * and if it has, make sure only to enqueue the scripts on the relevant screens
+		 */
+		
+	    if ( isset($this->plugin_screen_slug) ){
+	    	
+	    	/*
+			 * Check if current screen is the admin page for this plugin
+			 * Don't enqueue script/style if it's not
+			 */
+	    
+			 $screen = get_current_screen();
+			 if ( $screen->id != $this->plugin_screen_slug )
+			 	return;
+	    
+	    }
+
+		wp_enqueue_style( 'plugin-name-admin-styles', plugins_url( 'css/admin.css', __FILE__ ) );
 
 	} // end register_admin_styles
 
+
 	/**
 	 * Registers and enqueues admin-specific JavaScript.
 	 */
 	public function register_admin_scripts() {
 
-		// TODO:	Change 'plugin-name' to the name of your plugin
-		wp_enqueue_script( 'plugin-name-admin-script', plugins_url( 'plugin-name/js/admin.js' ), array('jquery') );
+		/*
+		 * Check if the plugin has registered a settings page
+		 * and if it has, make sure only to enqueue the scripts on the relevant screens
+		 */
+		
+	    if ( isset($this->plugin_screen_slug) ){
+	    	
+	    	/*
+			 * Check if current screen is the admin page for this plugin
+			 * Don't enqueue script/style if it's not
+			 */
+	    
+			 $screen = get_current_screen();
+			 if ( $screen->id != $this->plugin_screen_slug )
+			 	return;
+	    
+	    }
+
+		wp_enqueue_script( 'plugin-name-admin-script', plugins_url( 'js/admin.js', __FILE__ ), array('jquery') );
 
 	} // end register_admin_scripts
 
@@ -172,6 +210,7 @@ class PluginName {
 	} // end plugin_admin_page
 
 
+
 	/*--------------------------------------------*
 	 * Core Functions
 	 *---------------------------------------------*/