The popup mechanism allows blocks of content to be selectively displayed and positioned with respect to an anchor. It has several parts:
- StateTiddlers to record whether a popup is currently displayed or not
- The RevealWidget to selectively display the popup content
- For "sticky" popups — those that don't close when clicking inside one — set the class attribute to
tc-popup-keep
- The ButtonWidget to trigger the display of the popup by setting the state tiddler appropriately