外掛說明
Integrates Canvas into WordPress.
- Provide canvas shortcode.
- Provides a filter hook when saving the canvas.
- It supports both mouse and touch.
- It supports both the management screen and the public screen. The appearance of buttons and select boxes on the public screen depends on the CSS of the theme.
How to use the canvas
Sample of how to use the filter hook
- Shortcode for canvas display
echo do_shortcode( '[freecanvas height=500]' );
- shortcode
Attribute : Default : Description
width : 700 : Canvas width
height : 700 : Canvas height
name : The date and time string when the canvas was loaded : Unique name for this canvas
form_name: null : The name of the form value you want to get
form_name2: null : The name of the form value you want to get
form_name3: null : The name of the form value you want to get - Filter hook & Function
/**
* Filter hook & function for outputs a PNG image file */
*
* @param string $image_data image_data.
* @param string $name name.
* @param string $form_value form_value.
* @param string $form_value2 form_value2.
* @param string $form_value3 form_value3.
*/
function canvas_save( $image_data, $name, $form_value, $form_value2, $form_value3 ) {
$wp_uploads = wp_upload_dir();
$relation_path_true = strpos( $wp_uploads['baseurl'], '../' );
if ( $relation_path_true > 0 ) {
$upload_dir = wp_normalize_path( realpath( $wp_uploads['basedir'] ) );
} else {
$upload_dir = wp_normalize_path( $wp_uploads['basedir'] );
}
$filename = $upload_dir . '/' . $name . '.png';
$image = imagecreatefromstring( $image_data );
imagepng( $image, $filename );
}
add_filter( 'free_canvas_save', 'canvas_save', 10, 5 );
- Filter hook
Variable : Description : From
$image_data : PNG image data by Base64 : Value of Canvas
$name : Unique name for this canvas : Value of Free Canvas
$form_value : Form value obtained from form_name : Value of Form
$form_value2 : Form value obtained from form_name2 : Value of Form
$form_value3 : Form value obtained from form_name3 : Value of Form
安裝方式
- Upload
free-canvas
directory to the/wp-content/plugins/
directory - Activate the plugin through the ‘Plugins’ menu in WordPress
常見問題集
none
使用者評論
這個外掛目前沒有任何使用者評論。
參與者及開發者
變更記錄
1.10
Modified admin screen.
1.09
Supported WordPress 5.6.
1.08
Fixed ajax.
1.07
Fixed sample code.
1.06
Add shortcode attributes of form name.
1.05
Modified documentation.
1.04
Add shortcode attributes of form name.
1.03
Suppress screen transition when clicking save button in form.
1.02
Corrected the description.
1.01
Change readme.txt.
1.00
Initial release.