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

Fields

Modifier and Type	Field and Description
protected boolean	cloneEnabled
protected boolean	constrainedEvent Workaround for shift-key-state not correct in mouseReleased.
protected java.lang.String	error
protected boolean	gridEnabledEvent Workaround for alt-key-state not correct in mouseReleased.
protected mxCellMarker	marker
protected java.awt.Point[]	p

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

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

Constructor Summary

Constructors

Constructor and Description
mxEdgeHandler(mxGraphComponent graphComponent, mxCellState state)

Method Summary

Modifier and Type	Method and Description
protected void	connect(java.lang.Object edge, java.lang.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 java.awt.Rectangle	createHandle(java.awt.Point center)
protected java.awt.Rectangle	createHandle(java.awt.Point center, int size)
protected java.awt.Rectangle[]	createHandles() Creates the rectangles that define the handles.
protected java.awt.Point[]	createPoints(mxCellState s)
protected javax.swing.JComponent	createPreview() Creates the preview for this handler.
protected java.awt.Cursor	getCursor(java.awt.event.MouseEvent e, int index) Returns the cursor for the given event and handle.
protected java.awt.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 java.awt.Rectangle	getPreviewBounds()
java.awt.Color	getSelectionColor() Returns the color used to draw the selection border.
java.awt.Stroke	getSelectionStroke() Returns the stroke used to draw the selection border.
protected boolean	isCellBendable()
boolean	isCloneEnabled()
protected boolean	isFlipEvent(java.awt.event.MouseEvent e)
protected boolean	isHandleVisible(int index) Hides the middle handle if the edge is not bendable.
protected boolean	isIgnoredEvent(java.awt.event.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(java.awt.event.MouseEvent e) Processes the given event.
void	mousePressed(java.awt.event.MouseEvent e) Processes the given event.
void	mouseReleased(java.awt.event.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(java.lang.Object edge, int pointIndex, mxPoint point) Moves the edges control point with the given index to the given point.
void	paint(java.awt.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)
java.lang.String	validateConnection(java.lang.Object source, java.lang.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 java.awt.Point[] p

error

protected transient java.lang.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(java.awt.event.MouseEvent e)

No flip event is ignored.

Overrides:

isIgnoredEvent in class mxCellHandler

isFlipEvent

protected boolean isFlipEvent(java.awt.event.MouseEvent e)

validateConnection

public java.lang.String validateConnection(java.lang.Object source,
                                           java.lang.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 java.awt.Rectangle[] createHandles()

Description copied from class: mxCellHandler

Creates the rectangles that define the handles.

Overrides:

createHandles in class mxCellHandler

getHandleFillColor

protected java.awt.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 java.awt.Rectangle createHandle(java.awt.Point center)

createHandle

protected java.awt.Rectangle createHandle(java.awt.Point center,
                                          int size)

createPoints

protected java.awt.Point[] createPoints(mxCellState s)

createPreview

protected javax.swing.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 java.awt.Rectangle getPreviewBounds()

Returns:

Returns the bounds of the preview.

mousePressed

public void mousePressed(java.awt.event.MouseEvent e)

Description copied from class: mxCellHandler

Processes the given event.

Overrides:

mousePressed in class mxCellHandler

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent e)

Description copied from class: mxCellHandler

Processes the given event.

Overrides:

mouseDragged in class mxCellHandler

mouseReleased

public void mouseReleased(java.awt.event.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(java.lang.Object edge,
                         int pointIndex,
                         mxPoint point)

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

connect

protected void connect(java.lang.Object edge,
                       java.lang.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 java.awt.Cursor getCursor(java.awt.event.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 java.awt.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 java.awt.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(java.awt.Graphics g)

Description copied from class: mxCellHandler

Paints the visible handles of this handler.

Overrides:

paint in class mxCellHandler