imagick_preview.module in Imagick 7

File

imagick_preview/imagick_preview.module

<?php

/**
 * Implements hook_form_FORM_ID_alter()
 */
function imagick_preview_form_image_effect_form_alter(&$form, $form_state) {

  // #2485715 Do nothing when image toolkit is not used
  if (variable_get('image_toolkit', 'gd') != 'imagick') {
    return;
  }
  $style = image_style_load(arg(5));
  if (is_numeric(arg(7))) {
    $effect = $style['effects'][arg(7)];
    $data = $effect['data'];
  }
  else {
    $effect = image_effect_definition_load(arg(7));
    if (!empty($effect) && isset($effect['default settings'])) {
      $function = $effect['default settings'];
      $data = $function();
    }
  }
  _imagick_preview_form($data, $form['data'], $style, $effect);
}

/**
 * Helper function to update the preview image
 */
function _imagick_preview_update_preview($form, $form_state) {
  $style = $form_state['image_style'];
  $effect = $form_state['image_effect'];
  $data = $form_state['values']['data'];
  $form = _imagick_preview_form($data, $form, $style, $effect);
  return $form['preview']['images'];
}

/**
 * Helper function to show a preview image on the effect edit form
 */
function _imagick_preview_form($data, &$setting_form, $style, $effect) {
  $effect['data'] = $data;
  $combined = $style;
  if (isset($effect['ieid'])) {
    $combined['effects'][$effect['ieid']] = $effect;
  }
  else {
    $combined['effects'][] = $effect;
  }
  $style['effects'] = array(
    $effect,
  );

  // If preview setting has been enabled
  $form['preview']['title'] = array(
    '#theme' => 'html_tag',
    '#tag' => 'h4',
    '#value' => t('Preview'),
  );
  $form['preview']['images'] = array(
    '#type' => 'item',
    '#markup' => theme('imagick_style_preview', array(
      'style' => $style,
      'combined' => $combined,
    )),
    '#prefix' => '<div id="image-style-preview">',
    '#suffix' => '</div>',
  );
  $form['settings']['title'] = array(
    '#theme' => 'html_tag',
    '#tag' => 'h4',
    '#value' => t('Effect settings'),
  );
  foreach ($setting_form as $key => &$element) {
    _imagick_preview_add_element_ajax($element);
  }
  $setting_form = array_merge($form, $setting_form);
  return $form;
}

/**
 * Helper function to show a preview image on the effect edit form
 */
function _imagick_preview_add_element_ajax(&$element) {
  if (is_array($element) && isset($element['#type'])) {
    if ($element['#type'] == 'fieldset') {
      $children = element_children($element);
      foreach ($element as $key => &$child) {
        if (in_array($key, $children)) {
          _imagick_preview_add_element_ajax($child);
        }
      }
    }
    else {
      $element['#ajax'] = array(
        'callback' => '_imagick_preview_update_preview',
        'wrapper' => 'image-style-preview',
        'method' => 'replace',
      );
    }
  }
}

Functions

Name	Description
imagick_preview_form_image_effect_form_alter	Implements hook_form_FORM_ID_alter()
_imagick_preview_add_element_ajax	Helper function to show a preview image on the effect edit form
_imagick_preview_form	Helper function to show a preview image on the effect edit form
_imagick_preview_update_preview	Helper function to update the preview image