Panel that stacks children vertically.

Abstract class for elements that display text or images.

Derived classes should override ContentElement.GetValue method to provide the content (text, images, formatted values).

This class does not have child elements.

Base class for all elements, handles layout and styles. Instances of this class have no content and no children.

Elements with content (and no children) derive from ContentElement.

Elements with children derive from BasePanel.

This class doesn't do much by itself except call virtual methods that can be overridden in derived classes. It can draw a background and borders with no content, so it can be used to implement things like bars and spacers.

It is designed to be very light-weight, since typical documents may create thousands of these. Additional elements should be added to not-so-common derived classes.

Element that displays an ImageElement.Image.

Alignment and scaling are controlled by the element's Style.

Panel that stacks children horizontally.

The Style class contains display attributes that determine the appearance of content on the screen/printer. It includes most elements found in Css styles.

The Style class also contains methods for rendering and measuring content (strings and images) based on the style settings (fonts, margins, etc).

The Style objects are not hierarchical in the sense that they don't have parent styles and don't inherit attributes from the parent style. To create a new style based on an existing one, you would clone the original style, then apply whatever attributes you want to the new style.

The Style objects are hierarchical in the sense that two style attributes (Style.Font and Style.ForeBrush) don't need to be set. If these attributes are not set, they are inherited, but not from a parent Style object. Rather, these attributes are inherited from the parent UI object.

This type of inheritance make it easy to define a font on a Style associated with a parent UI object and have that font be automatically applied to all UI objects contained in the parent. By contrast, a Style.BackBrush attribute is not explicitly inherited. Instead, the parent UI object paints its client area with a brush, and child UI objects have a transparent background by default, so the parent background shows through by default. Other attributes such as alignment, margins, padding, etc are also not inherited.

Element that displays a string.

Alignment and formatting are controlled by the element's Style.

Element that displays a simple value (numbers, dates, etc).

The element's Style is responsible for formatting the value (with System.IFormattable).

Control that hosts X elements.

The control has an XView.Element property that gets or sets the element to be displayed.

The control is responsible for displaying the element, providing scrolling, and routing mouse and keyboard events to the hosted element.