de.lmu.ifi.dbs.elki.visualization.batikutil

Class DragableArea

java.lang.Object

de.lmu.ifi.dbs.elki.visualization.batikutil.DragableArea

All Implemented Interfaces:

EventListener

public class DragableArea
extends Object
implements EventListener

A simple dragable area for Batik.

Author:

Erich Schubert

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	DragableArea.DragListener Listener interface for drag events.

Field Summary

Fields

Modifier and Type	Field and Description
protected Element	coordref The coordinate system node.
protected Element	element Our element node.
protected DragableArea.DragListener	listener A listener to notify on drags (when not subclassing).
protected org.w3c.dom.svg.SVGPoint	startDragPoint The point where the drag started.
protected SVGPlot	svgp The plot we are attached to.

Constructor Summary

Constructors

Constructor and Description
DragableArea(SVGPlot plot, double x, double y, double w, double h) Constructor for a dragable area. use getElement() to get the DOM node.
DragableArea(SVGPlot plot, double x, double y, double w, double h, DragableArea.DragListener listener) Constructor for a dragable area. use getElement() to get the DOM node.
DragableArea(SVGPlot plot, Element coordref, double x, double y, double w, double h) Constructor for a dragable area. use getElement() to get the DOM node.
DragableArea(SVGPlot plot, Element coordref, double x, double y, double w, double h, DragableArea.DragListener listener) Constructor for a dragable area. use getElement() to get the DOM node.

Method Summary

Methods

Modifier and Type	Method and Description
void	destroy() Remove the listeners
void	disableStart() Disable capturing of 'mousedown' events.
protected void	disableStop() Disable capturing of 'mousemove' and 'mouseup' events.
protected boolean	duringDrag(org.w3c.dom.svg.SVGPoint startPoint, org.w3c.dom.svg.SVGPoint dragPoint, Event evt, boolean inside) Method called during drags.
void	enableStart() Enable capturing of 'mousedown' events.
protected void	enableStop() Enable capturing of 'mousemove' and 'mouseup' events.
protected boolean	endDrag(org.w3c.dom.svg.SVGPoint startPoint, org.w3c.dom.svg.SVGPoint dragPoint, Event evt, boolean inside) Method called when a drag was ended.
protected org.w3c.dom.svg.SVGPoint	getCoordinates(Event evt) Return the event coordinates for this event.
Element	getElement() The DOM element.
void	handleEvent(Event evt)
void	makeInvisible() Make the rectangle invisible.
void	makeVisible() Make the rectangle visible, for debug purposes.
protected boolean	startDrag(org.w3c.dom.svg.SVGPoint startPoint, Event evt) Action to do on drag start.

Methods inherited from class java.lang.Object

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

Field Detail

element

protected final Element element

Our element node.

coordref

protected final Element coordref

The coordinate system node.

svgp

protected final SVGPlot svgp

The plot we are attached to.

startDragPoint

protected org.w3c.dom.svg.SVGPoint startDragPoint

The point where the drag started.

listener

protected DragableArea.DragListener listener

A listener to notify on drags (when not subclassing).

Constructor Detail

DragableArea

public DragableArea(SVGPlot plot,
            double x,
            double y,
            double w,
            double h)

Constructor for a dragable area. use getElement() to get the DOM node. Note: always remember to call 'destroy()' to remove listeners!

Parameters:

plot - Plot we'll be added to

x - X position

y - Y position

w - Width

h - Height

DragableArea

public DragableArea(SVGPlot plot,
            Element coordref,
            double x,
            double y,
            double w,
            double h)

Constructor for a dragable area. use getElement() to get the DOM node. Note: always remember to call 'destroy()' to remove listeners!

Parameters:

plot - Plot we'll be added to

coordref - Element defining the coordinate system

x - X position

y - Y position

w - Width

h - Height

DragableArea

public DragableArea(SVGPlot plot,
            double x,
            double y,
            double w,
            double h,
            DragableArea.DragListener listener)

Constructor for a dragable area. use getElement() to get the DOM node. Note: always remember to call 'destroy()' to remove listeners!

Parameters:

plot - Plot we'll be added to

x - X position

y - Y position

w - Width

h - Height

listener - Drag listener

DragableArea

public DragableArea(SVGPlot plot,
            Element coordref,
            double x,
            double y,
            double w,
            double h,
            DragableArea.DragListener listener)

Constructor for a dragable area. use getElement() to get the DOM node. Note: always remember to call 'destroy()' to remove listeners!

Parameters:

plot - Plot we'll be added to

coordref - Element defining the coordinate system

x - X position

y - Y position

w - Width

h - Height

listener - Drag listener

Method Detail

destroy

public void destroy()

Remove the listeners

getElement

public Element getElement()

The DOM element.

Returns:

the element

enableStart

public void enableStart()

Enable capturing of 'mousedown' events.

disableStart

public void disableStart()

Disable capturing of 'mousedown' events.

enableStop

protected void enableStop()

Enable capturing of 'mousemove' and 'mouseup' events.

disableStop

protected void disableStop()

Disable capturing of 'mousemove' and 'mouseup' events.

handleEvent

public void handleEvent(Event evt)

Specified by:

handleEvent in interface EventListener

getCoordinates

protected org.w3c.dom.svg.SVGPoint getCoordinates(Event evt)

Return the event coordinates for this event.

Parameters:

evt - Event

Returns:

Coordinates

startDrag

protected boolean startDrag(org.w3c.dom.svg.SVGPoint startPoint,
                Event evt)

Action to do on drag start.

Parameters:

startPoint - Point where the drag was started.

evt - The event object

Returns:

true to start the drag operation

duringDrag

protected boolean duringDrag(org.w3c.dom.svg.SVGPoint startPoint,
                 org.w3c.dom.svg.SVGPoint dragPoint,
                 Event evt,
                 boolean inside)

Method called during drags.

Parameters:

startPoint - Drag starting point

dragPoint - Drag end point

evt - The event object

inside - Inside the tracked element

Returns:

true to continue the drag

endDrag

protected boolean endDrag(org.w3c.dom.svg.SVGPoint startPoint,
              org.w3c.dom.svg.SVGPoint dragPoint,
              Event evt,
              boolean inside)

Method called when a drag was ended.

Parameters:

startPoint - Drag starting point

dragPoint - Drag end point

evt - The event object

inside - Success flag

Returns:

true to complete the drag

makeInvisible

public void makeInvisible()

Make the rectangle invisible.

makeVisible

public void makeVisible()

Make the rectangle visible, for debug purposes.