Custom listbox/splitbutton

Source

Below is all you need to setup the example.

<script type="text/javascript" src="<your installation path>/tiny_mce/tiny_mce.js"></script>
<script type="text/javascript">
// Creates a new plugin class and a custom listbox
tinymce.create('tinymce.plugins.ExamplePlugin', {
    createControl: function(n, cm) {
        switch (n) {
            case 'mylistbox':
                var mlb = cm.createListBox('mylistbox', {
                     title : 'My list box',
                     onselect : function(v) {
                         tinyMCE.activeEditor.windowManager.alert('Value selected:' + v);
                     }
                });

                // Add some values to the list box
                mlb.add('Some item 1', 'val1');
                mlb.add('some item 2', 'val2');
                mlb.add('some item 3', 'val3');

                // Return the new listbox instance
                return mlb;

            case 'mysplitbutton':
                var c = cm.createSplitButton('mysplitbutton', {
                    title : 'My split button',
                    image : 'img/example.gif',
                    onclick : function() {
                        tinyMCE.activeEditor.windowManager.alert('Button was clicked.');
                    }
                });

                c.onRenderMenu.add(function(c, m) {
                    m.add({title : 'Some title', 'class' : 'mceMenuItemTitle'}).setDisabled(1);

                    m.add({title : 'Some item 1', onclick : function() {
                        tinyMCE.activeEditor.windowManager.alert('Some  item 1 was clicked.');
                    }});

                    m.add({title : 'Some item 2', onclick : function() {
                        tinyMCE.activeEditor.windowManager.alert('Some  item 2 was clicked.');
                    }});
                });

                // Return the new splitbutton instance
                return c;
        }

        return null;
    }
});

// Register plugin with a short name
tinymce.PluginManager.add('example', tinymce.plugins.ExamplePlugin);

// Initialize TinyMCE with the new plugin and listbox
tinyMCE.init({
    plugins : '-example', // - tells TinyMCE to skip the loading of the plugin
    mode : "textareas",
    theme : "advanced",
    theme_advanced_buttons1 : "mylistbox,mysplitbutton,bold,italic,underline,separator,strikethrough,justifyleft,justifycenter,justifyright,justifyfull,bullist,numlist,undo,redo,link,unlink",
    theme_advanced_buttons2 : "",
    theme_advanced_buttons3 : "",
    theme_advanced_toolbar_location : "top",
    theme_advanced_toolbar_align : "left",
    theme_advanced_statusbar_location : "bottom"
});
</script>

<form method="post" action="somepage">
	<textarea name="content" style="width:100%">
	</textarea>
</form>