Require Genesis for plugin activation

gistfile1.php

/**
   * Method that runs only when the plugin is activated.
	 * @since  0.1.0
	 * @return void
	 */
	public function activation( $network_wide ) {

		if ( $this->is_genesis_active() && $this->is_genesis_version_compatible() ) {
			// do activation stuff
		}
		else {
			$this->trigger_error( 'This plugin requires Genesis to be installed and activated', E_USER_ERROR );
		}

	}
	
	/**
	 * Triggers a PHP error given a message and an error level
	 * @since  0.1.0
	 * @return void
	 * @param $message
	 * @param $errno
	 */
	public function trigger_error( $message, $errno ) {

		if ( isset( $_GET['action'] ) && $_GET['action'] == 'error_scrape' ) {

			echo '<strong>' . $message . '</strong>';

			exit;

		}
		else {

			trigger_error( $message, $errno );

		}

	}

	/**
	 * Tests if the Genesis Theme is the active theme
	 * @since 0.1.0
	 * @return bool
	 */
	public function is_genesis_active() {
		$current_theme  = wp_get_theme();
		$required_theme = wp_get_theme( 'genesis' );

		// If Genesis is installed and current theme is a Genesis child theme or Genesis is active theme
		if ( $required_theme->exists() && ( ( $this->is_genesis_child() ) || ( 'genesis' == $current_theme ) ) ) {
			return true;
		}
		return false;
	}

	/**
	 * Tests if current theme is a child theme of Genesis
	 * @since 0.1.0
	 * @return bool
	 */
	public function is_genesis_child() {
		$current_theme = wp_get_theme();
		if ( 'genesis' !== $current_theme->get_template() ) {
			return false;
		}
		return true;
	}

	/**
	 * Tests if required version of Genesis is available
	 * @since 0.1.0
	 * @return bool
	 */
	public function is_genesis_version_compatible() {
		$version_required  = '1.9.1';
		$theme             = wp_get_theme( 'genesis' );
		$version_installed = $theme->Version;
		if ( version_compare( $version_installed, $version_required, '<' ) ) {
			return false;
		}
		return true;
	}