About display of controls in the ViewApp navigation hierarchy

Aside from the standard Content and Pane properties of all objects and graphics, the NavTree app includes sets of Behavior, Alarms, Appearance, and Search properties:

• Enable the Show Root property to show the root navigation item of the navigation model during runtime.

• Enable the Show Alarms property to show any active local and aggregated alarms on the individual items within the navigation model.

• Enable the Show Search Bar property to show a search field above the runtime Navigation tree to enter a search string. For more information about searching a ViewApp's navigation model during runtime, see Search View App Content During Runtime in the AVEVA OMI help.

• The Appearance properties determine the color, size, and font family of text shown on the navigation tree.

  Each property contains a drop-down list of binding options. Some properties only provide a Reset option to reset a property value to its default.

  In addition to a static binding, dynamic binding values can also be configured.

  

  The type of control property /attribute binding can be specified by selecting a value from the drop-down list.

  Constant	Static binding to the specified path. Enter a value in the data entry field.
  In	Dynamic root path with read only binding by the control to a reference.
  Out	Dynamic root path with write only binding by the control to a reference.
  InOut	Dynamic root path with read/write binding by the control to a reference.
  Reset	Reset the current property to its default value.

  

When Show Root is selected, the root navigation item appears at the top of the NavigationTree's hierarchical list of navigation items. The root navigation item is the default, selected startup item when a ViewApp starts.

The root navigation item is a custom navigation item, which supports the following common behaviors of all navigation items:

• The default name of the root navigation item is Home.

• The root navigation item can be renamed like any navigation item.

• The root navigation item can be a reference to an asset or a graphic item.

• The root navigation item can hold custom actions defining layouts and content in layouts.

The following behaviors are specific to the root navigation item:

• The root navigation item cannot be deleted.

• Sibling items to the root cannot be created.

When Show Alarms is selected (it is selected by default), alarm counts from the AlarmCntsBySeverity attribute are displayed on any NavigationTree item with an active alarm. If the alarm has been aggregated from a contained object, alarms are shown at 50% opacity (transparency) on the containing object. If alarm is on the object, it is shown as a solid color. The alarm color and graphic reflect the severity of the alarm. Graphics and animations for the alarm counts are taken from the Galaxy style library.

Set values for the color and font properties. Select the color property and then select the small triangle at the right of both property fields to show the color picker.

If you want to create event handler scripts, select the Available Events field to show a list of NavTreeControl events.