PadComp(3) · carta

NAME

PadComp, PadView, PadGraphic, PSPad - pad connector subject, view, structured graphic, and PostScript external representation

SYNOPSIS

#include <Unidraw/Components/pad.h>

DESCRIPTION

PadComp is a Connector subclass that supports connectivity with two degrees of freedom. It uses a PadGraphic to store its graphical attributes. PadView is a GraphicView for displaying the pad. PSPad is a PostScriptView that externalizes the subject's information in PostScript form.

PADCOMP PUBLIC OPERATIONS

PadComp(PadGraphic* = nil): The constructor takes an optional PadGraphic that defines the pad's graphical attributes.

virtual void Interpret(Command*)

virtual void Uninterpret(Command*): PadComp (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): PadComp redefines these functions to return and assign its _mobility protected member. The pad has fixed mobility initially.

Pad* GetPad(): Return the Pad graphic that defines the line's attributes. GetPad is simply a more specific form of the GetGraphic operation.

PADVIEW PUBLIC OPERATIONS

PadView(PadComp* = nil): Create an PadView, optionally supplying the subject.

virtual void Interpret(Command*): PadView interprets AlignToGridCmd to align its lower left to the grid.

virtual Manipulator* CreateManipulator(

Viewer*, Event&, Transformer*, Tool*

)

virtual void InterpretManipulator(Manipulator*): PadViews respond only to manipulation by GraphicCompTools, MoveTools, and ConnectTools. PadView inherits its MoveTool response from ConnectorView. GraphicCompTool will let the user sweep out a rectangle that reflects the pad's size. Creation will be influenced by gravity, if any. PadView creates a ConnectManip in response to the ConnectTool, which will exhibit a gravational attraction to potential target connectors. PadView will produce a ConnectCmd to connect the pad to its target. A pad connected in this way will receive floating mobility.

PadComp* GetPadComp(): Return the subject.

PADVIEW PROTECTED OPERATIONS

PadGraphic* GetPad(): Return the PadGraphic that defines the pad's attributes. GetPad is simply a more specific form of the GetGraphic operation.

virtual PadComp* NewSubject(PadGraphic*): A helper function that creates a PadComp subject with the given pad graphic. This function produces the proper subject when the GraphicCompTool's manipulator is interpreted. Subclasses can redefine this operation to return a PadComp subclass, 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.

PADGRAPHIC PUBLIC OPERATIONS

PadGraphic(

Coord = 0, Coord = 0, Coord = 0, Coord = 0,

Graphic* = nil

): Create a PadGraphic, optionally specifying lower-left and upper-right corners and a graphic from which to obtain its default graphics attributes.

void GetOriginal(Coord&, Coord&, Coord&, Coord&): Return the PadGraphic's original coordinates as specified in the constructor.

PSPAD PUBLIC OPERATIONS

PSPad(PadComp* = nil): Construct a PostScript external representation of the given subject, if any.