ctx::ui

add parent_tag

Adds a new item to the active context.

blockredraw ?value?

Blocks the context GUI update. Valid values are 0 (off) and 1 (on). If no value is provided, the command returns the active state.

delete item_tag

Removes the specified item from the active context.

get item_tag attribute

Returns the specified attribute for the given item.

set item_tag -attribute value

Updates the value of the specified attribute for the given item.

insert parent_tag position_tag

Adds a new item to the active context at a specific position.

post item_tag

Displays the item with the specified tag.

unpost item_tag

Hides the item with the specified tag.

print ?item_tag?

Returns the XML definition of the active context or of a specific item if an item tag is provided.

To print the entire XML definition of the active context:

 ctx::ui print 

To update the value of the attribute named “values” of a context item “meshtype”:

ctx::ui set meshtype -values “Advanced Free Mapped” 

Incorrect usage results in a Tcl error. To detect errors, you can use the catch command:

if { [ catch {command_name...} ] } {
   # Handle error
}