org.das2.event

Class EmptyDragRenderer

java.lang.Object

org.das2.event.EmptyDragRenderer

All Implemented Interfaces:

DragRenderer

public class EmptyDragRenderer
extends java.lang.Object
implements DragRenderer

Field Summary

Fields

Modifier and Type	Field and Description
static EmptyDragRenderer	renderer

Fields inherited from interface org.das2.event.DragRenderer

ghostColor

Method Summary

Modifier and Type	Method and Description
void	clear(java.awt.Graphics g) clears whatever renderDrag rendered.
MouseDragEvent	getMouseDragEvent(java.lang.Object source, java.awt.Point p1, java.awt.Point p2, boolean isModified) promotes the drag begin and end into a mouseDragEvent.
boolean	isPointSelection() indicates that the mouse module's mousePointSelected() should be called as new mouse events come in.
boolean	isUpdatingDragSelection() range selection events should be fired during drag.
java.awt.Rectangle[]	renderDrag(java.awt.Graphics g, java.awt.Point p1, java.awt.Point p2) draws the drag for mousing from p1 to p2, and returns an array of Rectangles covering the rendering.

Methods inherited from class java.lang.Object

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

Field Detail

renderer

public static final EmptyDragRenderer renderer

Method Detail

renderDrag

public java.awt.Rectangle[] renderDrag(java.awt.Graphics g,
                                       java.awt.Point p1,
                                       java.awt.Point p2)

Description copied from interface: DragRenderer

draws the drag for mousing from p1 to p2, and returns an array of Rectangles covering the rendering. If nothing is drawn, then an array of length zero should be returned, and nulls are allowed in the array. p1 and p2, and g are in the canvas frame of reference.

Specified by:

renderDrag in interface DragRenderer

Parameters:

g - the graphics context for rendering

p1 - the click point

p2 - the current mouse position during drag and release.

Returns:

getMouseDragEvent

public MouseDragEvent getMouseDragEvent(java.lang.Object source,
                                        java.awt.Point p1,
                                        java.awt.Point p2,
                                        boolean isModified)

Description copied from interface: DragRenderer

promotes the drag begin and end into a mouseDragEvent.

Specified by:

getMouseDragEvent in interface DragRenderer

p1 - the click point

p2 - the current mouse position during drag and release.

Returns:

clear

public void clear(java.awt.Graphics g)

Description copied from interface: DragRenderer

clears whatever renderDrag rendered. This is not used by the DasMouseInputAdapter, but must still be supported for now. Originally the drag renderer would have to unpaint itself as well, but this is no longer used.

Specified by:

clear in interface DragRenderer

Parameters:

g - the graphics context

isPointSelection

public boolean isPointSelection()

Description copied from interface: DragRenderer

indicates that the mouse module's mousePointSelected() should be called as new mouse events come in.

Specified by:

isPointSelection in interface DragRenderer

Returns:

true if the mouse module should receive events during the drag.

isUpdatingDragSelection

public boolean isUpdatingDragSelection()

Description copied from interface: DragRenderer

range selection events should be fired during drag.

Specified by:

isUpdatingDragSelection in interface DragRenderer

Returns:

true if selection events should be fired during drag.