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)