SugarCRM Subpanel lazy loadding

custom\Extension\application\Ext\LogicHooks\LazyloadHooks.php

<?php
if (!isset($hook_array) || !is_array($hook_array)) {
    $hook_array = array();
}
if (!isset($hook_array['after_ui_frame']) || !is_array($hook_array['after_ui_frame'])) {
    $hook_array['after_ui_frame'] = array();
}
$hook_array['after_ui_frame'][] = array(
    1, 
    'Lazyload', 
    'custom/vendor/Lazyload/LogicHooks/LazyloadLauncher.php', 
    'Lazyload_LogicHooks_LazyloadLauncher', 
    'run'
);

custom\vendor\Lazyload\LogicHooks\LazyloadLauncher.php

<?php

class Lazyload_LogicHooks_LazyloadLauncher 
{

    /**
     * Add JS to launch Subpanel with lazyload
     *
     * @param string $event -- What kind of logic_hook is it (after_ui_frame, after_ui_footer...)
     * @param string $arguments -- unused
     * @return unknown -- No return
     */
    public function run($event, $arguments)
    {
        if ($GLOBALS['app']->controller->action == 'DetailView') {
            echo '<script type="text/javascript"">
                  if ( typeof(Lazyload) == \'undefined\' ) Lazyload = {};
                  if ( typeof(Lazyload.util) == \'undefined\' ) Lazyload.util = {};
                  Lazyload.util.loadVisibleSubpanel = function () { 
                      var subPanelLayouts = SUGAR.subpanelUtils.getLayout();
                      for( i=0; i < subPanelLayouts.length; i++) { 
                          var subPanelName = subPanelLayouts[i];
                          var position = $("#subpanel_title_"+subPanelName).offset().top;
                          var scllwidth = $(window).scrollTop() + $(window).height();
                          if ( scllwidth > position && $.inArray(subPanelName, subPanelDisplayed) == -1) {
                              subPanelDisplayed.push(subPanelName);
                              current_child_field = subPanelName;
                              showSubPanel(subPanelName,null,null, \'' .$GLOBALS['app']->controller->module . '\');
                              $(\'#show_link_\'+subPanelName).css(\'display\', \'none\');
                              $(\'#hide_link_\'+subPanelName).css(\'display\', \'\');
                          }
                      }   
                  }

                  var subPanelDisplayed = new Array();
                  SUGAR.util.doWhen("typeof(SUGAR.subpanelUtils) == \'object\' && typeof(SUGAR.subpanelUtils.onDrag) == \'function\' && document.getElementById(\'subpanel_list\') && typeof($) != \'undefined\'", function() {
                      Lazyload.util.loadVisibleSubpanel();
                      $(window).scroll(Lazyload.util.loadVisibleSubpanel);
                  });
            </script>';
        }
    }
}

SugarCRM Subpanel lazy loadding.rst

Steps to add lazy loadding on SugarCRM 6.5.x subpanel:

• Step 1: Configure "hide_subpanel" core setting to false in config_override.php file to disable subpanel loading : http://support.sugarcrm.com/02_Documentation/04_Sugar_Developer/Sugar_Developer_Guide_6.5/02_Application_Framework/Helper_Classes/Configurator/Core_Settings#hide_subpanels
• Step 2: Define a logic hook for the entire application
• Step 3: Design the JS of the logic hook
• Step 4: Make a Quick Repair & Rebuild :-)