org.openbp.cockpit.modeler.figures.spline
Class ChangeConnectionHandle

java.lang.Object
  CH.ifa.draw.standard.AbstractHandle
      org.openbp.cockpit.modeler.figures.spline.ChangeConnectionHandle

All Implemented Interfaces:

CH.ifa.draw.framework.Handle

Direct Known Subclasses:

ChangeConnectionEndHandle, ChangeConnectionStartHandle

public abstract class ChangeConnectionHandle
extends CH.ifa.draw.standard.AbstractHandle

ChangeConnectionHandle factors the common code for handles that can be used to reconnect connections.

Author:

Stephan Moritz

See Also:

ChangeConnectionEndHandle, ChangeConnectionStartHandle

Nested Class Summary

class

ChangeConnectionHandle.CanConnectDecorator Decorator that decorates a figure if the source of the connection can connect to it with a transparent green overlay rectangle.

Field Summary

protected PolySplineConnection

connectionFigure Connection the handle belongs to

Fields inherited from class CH.ifa.draw.standard.AbstractHandle

HANDLESIZE

Constructor Summary

protected

ChangeConnectionHandle(CH.ifa.draw.framework.Figure owner) Initializes the change connection handle.

Method Summary

boolean	canLinkFigures(CH.ifa.draw.framework.Figure start, CH.ifa.draw.framework.Figure target) Checks if two figures can be connected using a control link.
protected abstract void	connect(CH.ifa.draw.framework.Connector c) Connect the spline with the given figure.
protected abstract void	disconnect() Disconnects the connection.
void	draw(java.awt.Graphics g)
protected CH.ifa.draw.framework.Connector	findConnector(int x, int y, CH.ifa.draw.framework.Figure figure) Finds a connection target of the given figure at the given position.
void	invokeEnd(int x, int y, int anchorX, int anchorY, CH.ifa.draw.framework.DrawingView view) Connects the figure to the new target.
void	invokeStart(int x, int y, CH.ifa.draw.framework.DrawingView view) Disconnects the connection.
void	invokeStep(int x, int y, int anchorX, int anchorY, CH.ifa.draw.framework.DrawingView view) Finds a new target of the connection.
protected abstract void	setPoint(int x, int y) Sets the location of the target point.
protected CH.ifa.draw.framework.Connector	source() Gets the side of the connection that is unaffected by the change.
protected abstract CH.ifa.draw.framework.Connector	target() Returns the target connector of the change.

Methods inherited from class CH.ifa.draw.standard.AbstractHandle

containsPoint, displayBox, getUndoActivity, invokeEnd, invokeStart, invokeStep, locate, owner, setUndoActivity

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

connectionFigure

protected PolySplineConnection connectionFigure

Connection the handle belongs to

Constructor Detail

ChangeConnectionHandle

protected ChangeConnectionHandle(CH.ifa.draw.framework.Figure owner)

Initializes the change connection handle.

Parameters:

owner - Owner figure of the handle

Method Detail

disconnect

protected abstract void disconnect()

Disconnects the connection.

connect

protected abstract void connect(CH.ifa.draw.framework.Connector c)

Connect the spline with the given figure.

Parameters:

c - Connector of the figure to connect to

setPoint

protected abstract void setPoint(int x,
                                 int y)

Sets the location of the target point.

Parameters:

x - Document coordinate

y - Document coordinate

target

protected abstract CH.ifa.draw.framework.Connector target()

Returns the target connector of the change.

source

protected CH.ifa.draw.framework.Connector source()

Gets the side of the connection that is unaffected by the change.

invokeStart

public void invokeStart(int x,
                        int y,
                        CH.ifa.draw.framework.DrawingView view)

Disconnects the connection.

Specified by:

invokeStart in interface CH.ifa.draw.framework.Handle

Overrides:

invokeStart in class CH.ifa.draw.standard.AbstractHandle

Parameters:

x - Document coordinate

y - Document coordinate

view - View to draw on

invokeStep

public void invokeStep(int x,
                       int y,
                       int anchorX,
                       int anchorY,
                       CH.ifa.draw.framework.DrawingView view)

Finds a new target of the connection.

Specified by:

invokeStep in interface CH.ifa.draw.framework.Handle

Overrides:

invokeStep in class CH.ifa.draw.standard.AbstractHandle

Parameters:

x - Document coordinate

y - Document coordinate

anchorX - Document coordinate of the anchor point of the handle

anchorY - Document coordinate of the anchor point of the handle

view - View to draw on

invokeEnd

public void invokeEnd(int x,
                      int y,
                      int anchorX,
                      int anchorY,
                      CH.ifa.draw.framework.DrawingView view)

Connects the figure to the new target. If there is no new target the connection reverts to its original one.

Specified by:

invokeEnd in interface CH.ifa.draw.framework.Handle

Overrides:

invokeEnd in class CH.ifa.draw.standard.AbstractHandle

Parameters:

x - Document coordinate

y - Document coordinate

anchorX - Document coordinate of the anchor point of the handle

anchorY - Document coordinate of the anchor point of the handle

view - View to draw on

findConnector

protected CH.ifa.draw.framework.Connector findConnector(int x,
                                                        int y,
                                                        CH.ifa.draw.framework.Figure figure)

Finds a connection target of the given figure at the given position.

Parameters:

x - Document coordinate

y - Document coordinate

figure - Figure to search

Returns:

The connector of the target or null if there is none at this position

draw

public void draw(java.awt.Graphics g)

Specified by:

draw in interface CH.ifa.draw.framework.Handle

Overrides:

draw in class CH.ifa.draw.standard.AbstractHandle

canLinkFigures

public boolean canLinkFigures(CH.ifa.draw.framework.Figure start,
                              CH.ifa.draw.framework.Figure target)

Checks if two figures can be connected using a control link. In case of parameter figures, the method will check if the data types expected/returned by the parameters are compatible. If the CTRL key is pressed, this check will be omitted. This is useful if the data link properties (source/target member path) need to be edited in order to make the figure data types compatible.

Parameters:

start - Start figure

target - Target figure

Returns:

true: The figures can be connected.
false: The figures can be connected.