--- Frame is in many ways the most fundamental widget object. Other types of widget derivatives such as FontStrings, Textures and Animations can only be created attached to a Frame or other derivative of a Frame.
--- FontStrings are one of the two types of LayoutFrame that is visible on the screen. It draws a block of text on the screen using the characteristics in an associated FontObject.
--- Textures are visible areas descended from LayoutFrame, that display either a color block, a gradient, or a graphic raster taken from a .tga or .blp file
--- An AnimationGroup is how various animations are actually applied to a region; this is how different behaviors can be run in sequence or in parallel with each other, automatically. When you pause an AnimationGroup, it tracks which of its child animations were playing and how far advanced they were, and resumes them from that point.
-- An Animation in a group has an order from 1 to 100, which determines when it plays; once all animations with order 1 have completed, including any delays, the AnimationGroup starts all animations with order 2.
-- An AnimationGroup can also be set to loop, either repeating from the beginning or playing backward back to the beginning. An AnimationGroup has an OnLoop handler that allows you to call your own code back whenever a loop completes. The :Finish() method stops the animation after the current loop has completed, rather than immediately.
--- Animations are used to change presentations or other characteristics of a frame or other region over time. The Animation object will take over the work of calling code over time, or when it is done, and tracks how close the animation is to completion.
-- The Animation type doesn't create any visual effects by itself, but it does provide an OnUpdate handler that you can use to support specialized time-sensitive behaviors that aren't provided by the transformations descended from Animations. In addition to tracking the passage of time through an elapsed argument, you can query the animation's progress as a 0-1 fraction to determine how you should set your behavior.
-- You can also change how the elapsed time corresponds to the progress by changing the smoothing, which creates acceleration or deceleration, or by adding a delay to the beginning or end of the animation.
-- You can also use an Animation as a timer, by setting the Animation's OnFinished script to trigger a callback and setting the duration to the desired time.
--- Alpha is a type of animation that automatically changes the transparency level of its attached region as it progresses. You can set the degree by which it will change the alpha as a fraction; for instance, a change of -1 will fade out a region completely
--- Rotation is an Animation that automatically applies an affine rotation to the region being animated. You can set the origin around which the rotation is being done, and the angle of rotation in either degrees or radians.
--- Scale is an Animation type that automatically applies an affine scalar transformation to the region being animated as it progresses. You can set both the multiplier by which it scales, and the point from which it is scaled.
--- CheckButtons are a specialized form of Button; they maintain an on/off state, which toggles automatically when they are clicked, and additional textures for when they are checked, or checked while disabled.
--- Cooldown is a specialized variety of Frame that displays the little "clock" effect over abilities and buffs. It can be set with its running time, whether it should appear to "fill up" or "empty out", and whether or not there should be a bright edge where it's changing between dim and bright.
--- ScrollFrame is used to show a large body of content through a small window. The ScrollFrame is the size of the "window" through which you want to see the larger content, and it has another frame set as a "ScrollChild" containing the full content.
--- The most sophisticated control over text display is offered by SimpleHTML widgets. When its text is set to a string containing valid HTML markup, a SimpleHTML widget will parse the content into its various blocks and sections, and lay the text out. While it supports most common text commands, a SimpleHTML widget accepts an additional argument to most of these; if provided, the element argument will specify the HTML elements to which the new style information should apply, such as formattedText:SetTextColor("h2", 1, 0.3, 0.1) which will cause all level 2 headers to display in red. If no element name is specified, the settings apply to the SimpleHTML widget's default font.
--- Model provide a rendering environment which is drawn into the backdrop of their frame, allowing you to display the contents of an .m2 file and set facing, scale, light and fog information, or run motions associated
--- PlayerModels are the most commonly used subtype of Model frame. They expand on the Model type by adding functions to quickly set the model to represent a particular player or creature, by unitID or creature ID.
