Format Extension for Aloha Editor

Is there any real help on how to extend aloha editor?

What I'm trying to do is expand their floating menu - I want to add a drop-down list with custom fields.

For example, if the user selects a custom field, then the label is added to html and something like: <special_field>appears inside the editable content.

Update: my code for the plugin initialization part is still ...

EXAMPLE.Product.init = function() {
    var that = this;

    // floating menu "Insert template field"-button
    var insertButton = new GENTICS.Aloha.ui.Button({
        label: 'template field',
        'size': 'small',
        'onclick': function() {
            that.insertfield();
        },
        'tooltip': this.i18n('button.insertfield'),
        'toggle': false
    });
    GENTICS.Aloha.FloatingMenu.addButton(
        'GENTICS.Aloha.continuoustext',
        insertButton,
        GENTICS.Aloha.i18n(GENTICS.Aloha, 'floatingmenu.tab.insert'),
        2
    );

    // product scope & product attribute field
    GENTICS.Aloha.FloatingMenu.createScope(this.getUID('product'), 'GENTICS.Aloha.global');

    this.productField = new GENTICS.Aloha.ui.AttributeField();

    //style for the drop down that appears when user searches for a fieldname
    this.productField.setTemplate('<span><b>{name}</b>' +
    '<br class="clear" /><i>{type}</i></span>');

    // set the type of field that are allowed to be visible of field search
    this.productField.setObjectTypeFilter(['specialfield','systemfield']);
    this.productField.setDisplayField('name');

    GENTICS.Aloha.FloatingMenu.addButton(
        this.getUID('product'),
        this.productField,
        this.i18n('floatingmenu.tab.specialfield'),
        1
    );

    // handle event as soon as a product block is clicked
    GENTICS.Aloha.EventRegistry.subscribe(GENTICS.Aloha, 'selectionChanged', function(event, rangeObject) {
        var foundMarkup = that.findProduct(rangeObject);
        jQuery('.product-selected').removeClass('product-selected');

        if (foundMarkup.length != 0) {
            GENTICS.Aloha.FloatingMenu.setScope(that.getUID('product'));
            that.productField.setTargetObject(foundMarkup, 'data-field-name');

            foundMarkup.addClass('product-selected');
        }
        // re-layout the Floating Menu
        GENTICS.Aloha.FloatingMenu.doLayout();
    });

    GENTICS.Aloha.EventRegistry.subscribe(
GENTICS.Aloha,
"editableDeactivated",
function(jEvent, aEvent) {
    jQuery('.product-selected').removeClass('product-selected');
}
);

This adds only one field to the editor, then I have to click on the field itself to change it to the correct field type.

Update2: my last code: (with screenshot below)

/**
* insert a template field at the cursor position
*/
function SetupButton(button) {
    var scope = 'GENTICS.Aloha.continuoustext';
    var definefield = '<label class="ui-specialfield" data-field-name="{0}" data-field-type="{1}" contentEditable="false">[{2}]</label>';

    // floating menu "Insert template field"-button
    var insertButton = new GENTICS.Aloha.ui.Button({
        label: button.Name.substring(0, 11), //truncate fields to enable easy viewing for now
        size: 'small',
        onclick: function() {
            console.debug(" field: " + button);

            var range = GENTICS.Aloha.Selection.getRangeObject();
            definefield = definefield.replace("{0}", button.Name);
            definefield = definefield.replace("{1}", button.Type);
            definefield = definefield.replace("{2}", button.Name);

            var newTemplate = jQuery(definefield);
            GENTICS.Utils.Dom.insertIntoDOM(newTemplate, range, jQuery(GENTICS.Aloha.activeEditable.obj));
            range.startContainer = range.endContainer = newTemplate.contents().get(0);
            range.select();
        },
        tooltip: button.Name,
        toggle: false
    });

    switch (button.Type) {
        case "sfield":
            GENTICS.Aloha.FloatingMenu.addButton(scope, insertButton, button.Type, 1);
            break;
        case "pfield":
            GENTICS.Aloha.FloatingMenu.addButton(scope, insertButton, button.Type, 1);
            break;
        case "afield":
            GENTICS.Aloha.FloatingMenu.addButton(scope, insertButton, button.Type, 1);
            break;
        case "cfield":
            GENTICS.Aloha.FloatingMenu.addButton(scope, insertButton, button.Type, 1);
            break;
        default:
            break;
    }

}

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