これは、単純な画像のロールオーバー効果を作成する機能を備えたウィジェットを作成する最初の試みです (完成したときに誰かがそれを望んでいる場合は、私にメッセージを残してください)。
サンプル ウィジェットをダウンロードしていくつかの変更を加えましたが、出力の html 部分にはまだ手を加えていないので、その部分は無視してください。今私の問題は、保存をクリックすると、フィールドの値がデフォルト値に戻り、サンプルウィジェットでこれを行わなかったことです。これが私のコードです:
<?php
/**
* Plugin Image: Rollover Widget
* Description: A widget that creates a rollover image effect with a hyperlink.
* Version: 0.1
* Author: Zak Elas
* Author URI:
*/
add_action( 'widgets_init', 'my_widget' );
function my_widget() {
register_widget( 'MY_Widget' );
}
class MY_Widget extends WP_Widget {
function MY_Widget() {
$widget_ops = array( 'classname' => 'example', 'description' => __('A widget that creates a rollover image effect with a hyperlink. ', 'example') );
$control_ops = array( 'width' => 300, 'height' => 350, 'id_base' => 'Rollover Widget' );
$this->WP_Widget( 'example-widget', __('Example Widget', 'example'), $widget_ops, $control_ops );
}
function widget( $args, $instance ) {
extract( $args );
//Our variables from the widget settings.
$link = apply_filters('widget_link', $instance['link'] );
$image = $instance['image'];
$rollover_image = $instance['rollover_image'];
echo $before_widget;
// Display the widget link
if ( $link )
echo $before_link . $link . $after_link;
//Display the name
printf( '<p>' . __('Hey their Sailor! My name is %1$s.', 'example') . '</p>', $image );
printf( '<p>' . __('Hey their Sailor! My name is %1$s.', 'example') . '</p>', $rollover_image );
echo $after_widget;
}
//Update the widget
function update( $new_instance, $old_instance ) {
$instance = $old_instance;
//Strip tags from link and name to remove HTML
$instance['link'] = strip_tags( $new_instance['link'] );
$instance['image'] = strip_tags( $new_instance['image'] );
$instance['rollover_image'] = strip_tags( $new_instance['rollover_image'] );
return $instance;
}
function form( $instance ) {
//Set up some default widget settings.
$defaults = array( 'link' => __('Example', 'example'), 'image' => __('/images/editorial.png', 'example') , 'rollover_image' => __('/images/editorial.png', 'example') );
$instance = wp_parse_args( (array) $instance, $defaults ); ?>
<p>
<label for="<?php echo $this->get_field_id( 'link' ); ?>"><?php _e('link', 'example'); ?></label>
<input id="<?php echo $this->get_field_id( 'link' ); ?>" name="<?php echo $this->get_field_name( 'link' ); ?>" value="<?php echo $instance['link']; ?>" style="width:100%;" />
</p>
<p>
<label for="<?php echo $this->get_field_id( 'image' ); ?>"><?php _e('image', 'example'); ?></label>
<input id="<?php echo $this->get_field_id( 'image' ); ?>" name="<?php echo $this->get_field_name( 'image' ); ?>" value="<?php echo $instance['image']; ?>" style="width:100%;" />
</p>
<p>
<label for="<?php echo $this->get_field_id( 'rollover_image' ); ?>"><?php _e('rollover_image:', 'example'); ?></label>
<input id="<?php echo $this->get_field_id( 'rollover_image' ); ?>" name="<?php echo $this->get_field_name( 'image' ); ?>" value="<?php echo $instance['rollover_image']; ?>" style="width:100%;" />
</p>
<?php
}
}
?>
そして、ここにサンプルウィジェットコードがあります
<?php
/**
* Plugin Name: A simple Widget
* Description: A widget that displays authors name.
* Version: 0.1
* Author: Bilal Shaheen
* Author URI: http://gearaffiti.com/about
*/
add_action( 'widgets_init', 'my_widget' );
function my_widget() {
register_widget( 'MY_Widget' );
}
class MY_Widget extends WP_Widget {
function MY_Widget() {
$widget_ops = array( 'classname' => 'example', 'description' => __('A widget that displays the authors name ', 'example') );
$control_ops = array( 'width' => 300, 'height' => 350, 'id_base' => 'example-widget' );
$this->WP_Widget( 'example-widget', __('Example Widget', 'example'), $widget_ops, $control_ops );
}
function widget( $args, $instance ) {
extract( $args );
//Our variables from the widget settings.
$title = apply_filters('widget_title', $instance['title'] );
$name = $instance['name'];
$show_info = isset( $instance['show_info'] ) ? $instance['show_info'] : false;
echo $before_widget;
// Display the widget title
if ( $title )
echo $before_title . $title . $after_title;
//Display the name
if ( $name )
printf( '<p>' . __('Hey their Sailor! My name is %1$s.', 'example') . '</p>', $name );
if ( $show_info )
printf( $name );
echo $after_widget;
}
//Update the widget
function update( $new_instance, $old_instance ) {
$instance = $old_instance;
//Strip tags from title and name to remove HTML
$instance['title'] = strip_tags( $new_instance['title'] );
$instance['name'] = strip_tags( $new_instance['name'] );
$instance['show_info'] = $new_instance['show_info'];
return $instance;
}
function form( $instance ) {
//Set up some default widget settings.
$defaults = array( 'title' => __('Example', 'example'), 'name' => __('Bilal Shaheen', 'example'), 'show_info' => true );
$instance = wp_parse_args( (array) $instance, $defaults ); ?>
//Widget Title: Text Input.
<p>
<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e('Title:', 'example'); ?></label>
<input id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo $instance['title']; ?>" style="width:100%;" />
</p>
//Text Input.
<p>
<label for="<?php echo $this->get_field_id( 'name' ); ?>"><?php _e('Your Name:', 'example'); ?></label>
<input id="<?php echo $this->get_field_id( 'name' ); ?>" name="<?php echo $this->get_field_name( 'name' ); ?>" value="<?php echo $instance['name']; ?>" style="width:100%;" />
</p>
//Checkbox.
<p>
<input class="checkbox" type="checkbox" <?php checked( $instance['show_info'], true ); ?> id="<?php echo $this->get_field_id( 'show_info' ); ?>" name="<?php echo $this->get_field_name( 'show_info' ); ?>" />
<label for="<?php echo $this->get_field_id( 'show_info' ); ?>"><?php _e('Display info publicly?', 'example'); ?></label>
</p>
<?php
}
}
?>