Views ===== As mentioned in the previous section, views may show editable attribute resources or trees of descriptive phrases. Configuration information is different for each of these types. Attribute views --------------- This view information is used to configure :smtk:`qtBaseView` instances. Views of an attribute resource may need to display many attributes, some of which may be created upon user input (i.e., by adding a new material or boundary condition). However, there must be one view marked as the top-level view for any given attribute resource. This view may have child views that it uses to organize (1) fixed, one-per-simulation attribute instances as well as (2) attribute instances that may vary in number to fit the needs of the simulation. Phrase views ------------ These views appear in 2 types of widgets in SMTK: panels holding tree views (such as the :smtk:`resource panel `) and widgets for selecting components or resources, where only a flat list is presented (such as the :smtk:`reference item widget `). Diagram views ------------- A :smtk:`diagram ` is a schematic view that uses nodes and arcs to represent the organization of information in a two-dimensional graph. This type of view is entirely dependent on Qt and further documentation for it is in the :ref:`smtk-qt-sys` extension section.