NAME¶
SlotComp, SlotView, HSlotComp, HSlotView, VSlotComp, VSlotView, SlotGraphic,
PSSlot - abstract base class and subclasses for slot connector subject and
view; and structured graphic and PostScript external representation classes
for slots
SYNOPSIS¶
#include <Unidraw/Components/slot.h>
DESCRIPTION¶
SlotComp is a Connector subclass that supports connectivity with one degree of
freedom. It serves as an abstract base class from which to derive HSlotComp
and VSlotComp, which support horizontal and vertical orientations. The slot
component classes use SlotGraphics to store their graphical attributes.
SlotView is an abstract subclass of ConnectorView for displaying slots.
HSlotView and VSlotView are SlotViews that display slots with the
corresponding orientations. Finally, PSSlot is a PostScriptView that
externalizes the slot subject's information in PostScript form.
SLOTCOMP PUBLIC OPERATIONS¶
- virtual void Interpret(Command*)
- virtual void Uninterpret(Command*)
- SlotComp (un)interprets a subset of commands that
connectors can generally interpret, namely MoveCmd, BrushCmd, AlignCmd,
MobilityCmd, DeleteCmd, and CutCmd.
- virtual Mobility GetMobility()
- virtual void SetMobility(Mobility)
- SlotComp redefines these functions to return and assign its
_mobility protected member. Slots have fixed mobility
initially.
- Slot* GetSlot()
- Return the Slot graphic that defines the line's attributes.
GetSlot is simply a more specific form of the GetGraphic operation.
SLOTCOMP PROTECTED OPERATIONS¶
- SlotComp(SlotGraphic* = nil)
- The constructor takes an optional SlotGraphic that defines
the slot's graphical attributes. It is protected to prevent instantiation,
since SlotComp is an abstract class.
- void SetOrientation(SlotGraphic*, Orientation)
- Define the orientation of the SlotComp's SlotGraphic. Only
SlotComp can specify this SlotGraphic attribute; HSlotComp and VSlotComp
subclasses set it to reflect their respective orientations.
SLOTVIEW PUBLIC OPERATIONS¶
- virtual void Interpret(Command*)
- SlotView interprets AlignToGridCmd to align its starting
point to the grid.
- virtual Manipulator* CreateManipulator(
- Viewer*, Event&, Transformer*, Tool*
- )
- virtual void InterpretManipulator(Manipulator*)
- SlotViews respond only to manipulation by GraphicCompTools,
MoveTools, and ConnectTools. SlotView inherits its MoveTool response from
ConnectorView. GraphicCompTool will let the user sweep out a crosshaired
rectangle that reflects the slot's size and orientation. Creation will be
influenced by gravity, if any. SlotView creates a ConnectManip in response
to the ConnectTool, which will exhibit a gravational attraction to
potential target connectors. SlotView will produce a ConnectCmd to connect
the slot to its target. A slot connected in this way will receive floating
mobility.
- SlotComp* GetSlotComp()
- Return the subject.
SLOTVIEW PROTECTED OPERATIONS¶
- SlotView(SlotComp* = nil)
- Create an SlotView, optionally supplying the subject. The
constructor is protected to prevent instantiation.
- SlotGraphic* GetSlot()
- Return the SlotGraphic that defines the slot's attributes.
GetSlot is simply a more specific form of the GetGraphic operation.
- virtual SlotComp* NewSubject(SlotGraphic*)
- A helper function that creates a SlotComp subject with the
given slot graphic. This function produces the proper subject when the
GraphicCompTool's manipulator is interpreted. HSlotView and VSlotView
redefine this operation to return the corresponding SlotComp subclasses,
thus eliminating the need to reimplement InterpretManipulator.
- Manipulator* CreateGraphicCompManip(
- Viewer*, Event&, Transformer*, Tool*
- )
- Manipulator* CreateConnectManip(
- Viewer*, Event&, Transformer*, Tool*
- )
- Command*
InterpretGraphicCompManip(Manipulator*)
- Command* InterpretConnectManip(Manipulator*)
- Helper functions used by CreateManipulator and
InterpretManipulator to create and interpret the manipulators associated
with GraphicCompTool and ConnectTool.
SLOTGRAPHIC PUBLIC OPERATIONS¶
- SlotGraphic(Coord, Coord, Coord, Graphic* =
nil)
- Create a SlotGraphic, specifying the starting point,
length, and optionally a graphic from which to obtain its default graphics
attributes.
- void GetOriginal(Coord&, Coord&,
Coord&)
- Return the SlotGraphic's original geometry parameters as
specified in the constructor.
PSSLOT PUBLIC OPERATIONS¶
- PSSlot(SlotComp* = nil)
- Construct a PostScript external representation of the given
subject, if any.
SEE ALSO¶
BrushCmd(3U), ConnectTool(3U), Connector(3U), ConnectorView3U), Event(3I),
Graphic(3U), GraphicCompTool(3U), Grid(3U), MoveTool(3U), PatternCmd(3U),
PostScriptView(3U), Transformer(3I), Viewer(3U), align(3U), edit(3U),
globals(3U), manips(3U), transforms(3U)