macrocmd(3u) [debian man page]
MacroCmd(3U) InterViews Reference Manual MacroCmd(3U) NAME
MacroCmd - a command that composes other commands SYNOPSIS
#include <Unidraw/Commands/macro.h> DESCRIPTION
MacroCmd composes other commands in a linear fashion. Executing a MacroCmd is equivalent to executing its children in preorder. PUBLIC OPERATIONS
MacroCmd(ControlInfo*) MacroCmd( Editor* = nil, Command* first = nil, Command* second = nil, Command* third = nil, Command* fourth = nil ) Construct a MacroCmd instance, optionally supplying up to four of its child commands. virtual void Execute() virtual void Unexecute() virtual boolean Reversible() Execute simply executes each child, from first to last. Unexecute calls Unexecute on each child, from last to first. The MacroCmd is reversible if any of its children are. virtual void SetEditor(Editor*) SetEditor calls SetEditor on each child with the given argument. Command* GetCommand(Iterator) void SetCommand(Command*, Iterator&) GetCommand returns the child Command to which an iterator points. SetCommand initializes the iterator to point to a particular child Command; it initializes the iterator to point to a nil instance if the given Command is not a child. void Append( Command*, Command* = nil, Command* = nil, Command* = nil ) void Prepend( Command*, Command* = nil, Command* = nil, Command* = nil ) void InsertAfter(Iterator, Command*) void InsertBefore(Iterator, Command*) void Remove(Command*) void Remove(Iterator&) Operations that modify the MacroCmd's list of children. Append and Prepend add up to four Commands to the end and the beginning of the list, respectively. InsertAfter and InsertBefore insert a Command after and before the Command pointed to by the iterator, respectively. The Remove operations remove a child from the list without deleting it. You can remove a child by referring to it explicitly or by specifying an iterator. If an iterator is supplied, the Remove operation should advance it to point to the follow- ing child as a side effect. PROTECTED OPERATIONS
Command* Cmd(UList*) UList* Elem(Iterator) Convenience functions for extracting a Command from a UList element a UList from an iterator, respectively. SEE ALSO
Command(3U), Iterator(3U), UList(3U) Unidraw 24 January 1991 MacroCmd(3U)
Check Out this Related Man Page
ComponentView(3U) InterViews Reference Manual ComponentView(3U) NAME
ComponentView - base class for views of objects that model domain-specific elements SYNOPSIS
#include <Unidraw/Components/compview.h> DESCRIPTION
ComponentView is an abstract base class for views of component subjects. Component views provide a specialized presentation of the infor- mation in the component subject to which they are attached. Usually there is at least one view subclass defined for each subclass of com- ponent subject. PUBLIC OPERATIONS
virtual void Interpret(Command*) virtual void Uninterpret(Command*) These operations call the corresponding subject operations by default. They are included in the component view protocol for conve- nience, since other objects often deal with component views rather than their subjects. virtual void Update() Notify the view of a change in some state that it depends on, normally state in the subject. This operation does nothing by default. virtual Component* GetParent() Return the view's parent, if any. Like component subjects, component views may be structured hierarchically, and their structure may or may not reflect that of their subject. Component* GetSubject() Return the component view's subject. virtual void First(Iterator&) virtual void Last(Iterator&) virtual void Next(Iterator&) virtual void Prev(Iterator&) virtual boolean Done(Iterator) Operations for iterating over the component view's children, if any. First and Last initialize an iterator to point to the begin- ning and end of the list of children, respectively. Next increments the iterator to point to the following child, while Prev decre- ments the iterator to point to the preceding child. Done returns whether or not the iterator points beyond the first or last child in the list. virtual ClassId GetClassId() virtual boolean IsA(ClassId) GetClassId returns the unique class identifier for the ComponentView subclass, while IsA returns whether the instance is of a class or subclass corresponding to the given identifier. IsA typically checks the given identifier against the instance's own (as defined by its GetClassId operation) and, failing that, calls its parent classes' IsA operation. All subclasses must redefine GetClassId and IsA to ensure that their identifiers are unique and that view category information is defined properly. See classes(3U) for more information on class identifiers and view categories. PROTECTED OPERATIONS
ComponentView(Component* subject = nil) The constructor initializes the component view's subject pointer to the given value. The view will also attach itself to the sub- ject if the argument is non-nil. virtual void SetSubject(Component*) Set the component's subject pointer to the given value. By default, this operation does not call Attach or Detach on the sub- ject(s). virtual void SetParent(Component* child, Component* parent) Notify a child component that it has a new or different parent. This operation does nothing by default. Composite components should call this function in their structure-modifying operations, and components that keep information about their parents should redefine it to update this information. SEE ALSO
Command(3U), Component(3U), Iterator(3U), classes(3U) Unidraw 20 August 1990 ComponentView(3U)