Helma Logo
main list history
previous version  overview  next version

Version 23 by zumbrunn on 07. December 2005, 16:18


    // function at Site.prototype.views.list.control(that)
    if (this.topics.count()) {
        that.topics = {};
        for (var topic in this.topics) {
            that.topics.name = this.topics[topic].name;
            that.topics.count = this.topics[topic].comments.count();


    <table border="1">
        <tr if="topics">
            <th lookup="true">Topic Name</th>
            <th lookup="true">Comment Count</th>
        <tr for="topics" class="rowcolor{ $topics % 2 }">
            <td>{ topics$.name }</td>
            <td if="!topics$.count" lookup="true">No comments yet</td>
            <td if="topics$.count == 1" lookup="true">{ topics$.count } comment</td>
            <td if="topics$.count > 1" lookup="true">{ topics$.count } comments</td>
        <tr if="!topics">
            <td colspan="2" align="center" lookup="true">This list is empty</td>


    // function at Site.prototype.controls.list
    var content = {
        main : this.views.list.render()
    var page = Page.views.default.render(content);
    return page;

this.views.list.control() is invoked when the list view is rendered. When it is invoked, "that" is the object which was passed as parameter of the render() method or otherwise an empty/default object. "that" is the object that will be used as the Javascript context when rendering the view.

Views would be E4X Javascript XML objects. When Helma would render these views, it would parse them for "lookup", "if" and "for" attributes and then evaluate them in the context of "that".

When parsing the "for" attributes, Helma would loop through the indicated object (topics) with <nobr>"for(var $topics in topics)"</nobr> and repeat the specified element (the table row) with <nobr>topics$ == topics[$topics]</nobr>

When parsing the "lookup" attributes, Helma would check if a lookup handler function exists and if so would apply it to the element's content.

this.controls.list would be the function that is called in order to handle the request, similar to todays this.list_action.