com.mxgraph.swing.handler
Class mxEdgeHandler

java.lang.Object
  com.mxgraph.swing.handler.mxCellHandler
      com.mxgraph.swing.handler.mxEdgeHandler

Direct Known Subclasses:

mxElbowEdgeHandler

public class mxEdgeHandler
extends mxCellHandler

Field Summary

protected boolean	cloneEnabled
protected boolean	constrainedEvent Workaround for shift-key-state not correct in mouseReleased.
protected String	error
protected boolean	gridEnabledEvent Workaround for alt-key-state not correct in mouseReleased.
protected mxCellMarker	marker
protected Point[]	p

Fields inherited from class com.mxgraph.swing.handler.mxCellHandler

bounds, first, graphComponent, handles, handlesVisible, index, preview, state

Constructor Summary

mxEdgeHandler(mxGraphComponent graphComponent, mxCellState state)

Method Summary

protected void	connect(Object edge, Object terminal, boolean isSource, boolean isClone) Connects the given edge to the given source or target terminal.
protected mxPoint	convertPoint(mxPoint point, boolean gridEnabled)
protected Rectangle	createHandle(Point center)
protected Rectangle	createHandle(Point center, int size)
protected Rectangle[]	createHandles() Creates the rectangles that define the handles.
protected Point[]	createPoints(mxCellState s)
protected JComponent	createPreview() Creates the preview for this handler.
protected Cursor	getCursor(MouseEvent e, int index) Returns the cursor for the given event and handle.
protected Color	getHandleFillColor(int index) Returns the color to be used to fill the handle at the specified index.
int	getIndexAt(int x, int y) Returns the index of the handle at the given location.
protected Rectangle	getPreviewBounds()
Color	getSelectionColor() Returns the color used to draw the selection border.
Stroke	getSelectionStroke() Returns the stroke used to draw the selection border.
protected boolean	isCellBendable()
boolean	isCloneEnabled()
protected boolean	isFlipEvent(MouseEvent e)
protected boolean	isHandleVisible(int index) Hides the middle handle if the edge is not bendable.
protected boolean	isIgnoredEvent(MouseEvent e) No flip event is ignored.
boolean	isSource(int index) Returns true if the current index is 0.
boolean	isTarget(int index) Returns true if the current index is the last index.
void	mouseDragged(MouseEvent e) Processes the given event.
void	mousePressed(MouseEvent e) Processes the given event.
void	mouseReleased(MouseEvent e) Processes the given event.
protected void	moveLabelTo(mxCellState edgeState, double x, double y) Moves the label to the given position.
protected void	movePoint(Object edge, int pointIndex, mxPoint point) Moves the edges control point with the given index to the given point.
void	paint(Graphics g) Paints the visible handles of this handler.
void	reset() Extends the implementation to reset the current error and marker.
void	setCloneEnabled(boolean cloneEnabled)
String	validateConnection(Object source, Object target) Returns the error message or an empty string if the connection for the given source target pair is not valid.

Methods inherited from class com.mxgraph.swing.handler.mxCellHandler

destroy, getBounds, getGraphComponent, getHandleBorderColor, getHandleCount, getIndex, getState, getToolTipText, isActive, isHandleEnabled, isHandlesVisible, isLabel, isLabelMovable, mouseMoved, refresh, setHandlesVisible, start

Methods inherited from class java.lang.Object

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

Field Detail

cloneEnabled

protected boolean cloneEnabled

p

protected Point[] p

error

protected transient String error

gridEnabledEvent

protected transient boolean gridEnabledEvent

Workaround for alt-key-state not correct in mouseReleased.

constrainedEvent

protected transient boolean constrainedEvent

Workaround for shift-key-state not correct in mouseReleased.

marker

protected mxCellMarker marker

Constructor Detail

mxEdgeHandler

public mxEdgeHandler(mxGraphComponent graphComponent,
                     mxCellState state)

Parameters:

graphComponent -

state -

Method Detail

setCloneEnabled

public void setCloneEnabled(boolean cloneEnabled)

isCloneEnabled

public boolean isCloneEnabled()

isIgnoredEvent

protected boolean isIgnoredEvent(MouseEvent e)

No flip event is ignored.

Overrides:

isIgnoredEvent in class mxCellHandler

isFlipEvent

protected boolean isFlipEvent(MouseEvent e)

validateConnection

public String validateConnection(Object source,
                                 Object target)

Returns the error message or an empty string if the connection for the given source target pair is not valid. Otherwise it returns null.

isSource

public boolean isSource(int index)

Returns true if the current index is 0.

isTarget

public boolean isTarget(int index)

Returns true if the current index is the last index.

isHandleVisible

protected boolean isHandleVisible(int index)

Hides the middle handle if the edge is not bendable.

Overrides:

isHandleVisible in class mxCellHandler

isCellBendable

protected boolean isCellBendable()

createHandles

protected Rectangle[] createHandles()

Description copied from class: mxCellHandler

Creates the rectangles that define the handles.

Overrides:

createHandles in class mxCellHandler

getHandleFillColor

protected Color getHandleFillColor(int index)

Description copied from class: mxCellHandler

Returns the color to be used to fill the handle at the specified index.

Overrides:

getHandleFillColor in class mxCellHandler

getIndexAt

public int getIndexAt(int x,
                      int y)

Description copied from class: mxCellHandler

Returns the index of the handle at the given location.

Overrides:

getIndexAt in class mxCellHandler

Parameters:

x -

y -

Returns:

Returns the inde of the handle at the given location.

createHandle

protected Rectangle createHandle(Point center)

createHandle

protected Rectangle createHandle(Point center,
                                 int size)

createPoints

protected Point[] createPoints(mxCellState s)

createPreview

protected JComponent createPreview()

Description copied from class: mxCellHandler

Creates the preview for this handler.

Overrides:

createPreview in class mxCellHandler

convertPoint

protected mxPoint convertPoint(mxPoint point,
                               boolean gridEnabled)

Parameters:

point -

gridEnabled -

Returns:

Returns the scaled, translated and grid-aligned point.

getPreviewBounds

protected Rectangle getPreviewBounds()

Returns:

Returns the bounds of the preview.

mousePressed

public void mousePressed(MouseEvent e)

Description copied from class: mxCellHandler

Processes the given event.

Overrides:

mousePressed in class mxCellHandler

mouseDragged

public void mouseDragged(MouseEvent e)

Description copied from class: mxCellHandler

Processes the given event.

Overrides:

mouseDragged in class mxCellHandler

mouseReleased

public void mouseReleased(MouseEvent e)

Description copied from class: mxCellHandler

Processes the given event.

Overrides:

mouseReleased in class mxCellHandler

reset

public void reset()

Extends the implementation to reset the current error and marker.

Overrides:

reset in class mxCellHandler

movePoint

protected void movePoint(Object edge,
                         int pointIndex,
                         mxPoint point)

Moves the edges control point with the given index to the given point.

connect

protected void connect(Object edge,
                       Object terminal,
                       boolean isSource,
                       boolean isClone)

Connects the given edge to the given source or target terminal.

Parameters:

edge -

terminal -

isSource -

moveLabelTo

protected void moveLabelTo(mxCellState edgeState,
                           double x,
                           double y)

Moves the label to the given position.

getCursor

protected Cursor getCursor(MouseEvent e,
                           int index)

Description copied from class: mxCellHandler

Returns the cursor for the given event and handle.

Overrides:

getCursor in class mxCellHandler

getSelectionColor

public Color getSelectionColor()

Description copied from class: mxCellHandler

Returns the color used to draw the selection border. This implementation returns null.

Overrides:

getSelectionColor in class mxCellHandler

getSelectionStroke

public Stroke getSelectionStroke()

Description copied from class: mxCellHandler

Returns the stroke used to draw the selection border. This implementation returns null.

Overrides:

getSelectionStroke in class mxCellHandler

paint

public void paint(Graphics g)

Description copied from class: mxCellHandler

Paints the visible handles of this handler.

Overrides:

paint in class mxCellHandler