Package com.luciad.view.lightspeed.editor

Class TLspPointEditor

java.lang.Object

com.luciad.view.lightspeed.editor.ALspEditor

com.luciad.view.lightspeed.editor.TLspPointEditor

All Implemented Interfaces:

ILspEditor

public class TLspPointEditor
extends ALspEditor

Enables visual editing of ILcd2DEditablePoint and ILcd3DEditablePoint objects in an ILspView.

Handles

The point editor defines the following edit handles for a point object:

• Location handle: allows the user to change the XY location of the point. For 3D points in a 3D view, this handle is painted on the terrain. This handle generates MOVE operations, with an XY constraint, and without properties.
• Height handle: (only for 3D points in a 3D view) allows the user to change the height (above the terrain) of the 3D point. This handle generates MOVE operations, with a Z constraint, and without properties.

The following figure illustrates these handles for both the 2D point case (left) and the 3D point case (right): the red dots represent the point handles and the blue dot represents the height handle for a 3D point.

Editing

Based on the TLspEditOperation, generated by an edit handle (see description of handles above), this editor performs different edit operations on the associated point object. The images below illustrate the effect of the different handles. In each image the gray color represents the previous state of the object and the red color represents the edited object:

• Location handle: Modifies the location of the point.
  
  
  (left) editing the location of a 2D point (right) editing the location of a 3d point
  
• Height handle: Modifies the height of the point.
  
  
  

Creation

The creation process of a 2D point object (and 3D points in a 2D view) consists of one step:

1. initialize the XY position of the point

For 3D points in a 3D view, another step is added to initialize the height (above the terrain) of the point:

2. a second step initializes the height of the 3D point

The figures below illustrate the creation process. Relevant changes that are new in each step are marked in red:

Setting the XY location of the point.		(only for 3D points in a 3D view) Initializing the height of a 3D point.

Since:

2012.0

Constructor Summary

Constructors

Constructor	Description
TLspPointEditor()	Creates a new TLspPointEditor.

Method Summary

Modifier and Type	Method	Description
boolean	canEdit(TLspEditContext aContext)	Returns true if super returns true and the given object is an instance of ILcd2DEditablePoint.
protected ALspEditHandle	createHeightHandle(ILcd3DEditablePoint aPoint, TLspEditContext aContext)	Creates a handle to modify the point's height.
protected ALspEditHandle	createLocationHandle(ILcd2DEditablePoint aPoint, TLspEditContext aContext)	Creates a handle to modify the point's location.
protected TLspEditOperationResult	editImpl(TLspEditOperation aOperation, ELspInteractionStatus aInteractionStatus, TLspEditContext aContext)	Called by the edit method to edit the given object based on the given edit operation.
ALspEditHandle	getCreateHandle(TLspEditContext aContext)	Returns a handle that is used to create the given object.
List<ALspEditHandle>	getEditHandles(TLspEditContext aContext)	Returns a set of handles for editing the given object.

Methods inherited from class com.luciad.view.lightspeed.editor.ALspEditor

canCopyGeometry, canPerformOperation, copyGeometrySFCT, edit, fireUndoableHappened

Methods inherited from class java.lang.Object

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

Constructor Details

TLspPointEditor

public TLspPointEditor()

Creates a new TLspPointEditor. This constructor does not initialize any state.

Method Details

canEdit

public boolean canEdit(TLspEditContext aContext)

Returns true if super returns true and the given object is an instance of ILcd2DEditablePoint.

Specified by:

canEdit in interface ILspEditor

Overrides:

canEdit in class ALspEditor

Parameters:

aContext - provides context information to the editor

Returns:

true if the above conditions are met, false otherwise.

createLocationHandle

protected ALspEditHandle createLocationHandle(ILcd2DEditablePoint aPoint,
 TLspEditContext aContext)

Creates a handle to modify the point's location. This handle generates MOVE operations, with an XY constraint, and without properties.

By default this method returns a TLspPointTranslationHandle for 3D points, when visualized in a 3D view. Otherwise a TLspObjectTranslationHandle is returned.

Parameters:

aPoint - the point to be edited

aContext - the given context

Returns:

an edit handle or null if no handle is needed

createHeightHandle

protected ALspEditHandle createHeightHandle(ILcd3DEditablePoint aPoint,
 TLspEditContext aContext)

Creates a handle to modify the point's height. This handle generates MOVE operations, with an XY constraint, and without properties.

Parameters:

aPoint - the point to be edited

aContext - the given context

Returns:

an edit handle or null if no handle is needed

editImpl

protected TLspEditOperationResult editImpl(TLspEditOperation aOperation,
 ELspInteractionStatus aInteractionStatus,
 TLspEditContext aContext)

Called by the edit method to edit the given object based on the given edit operation.

Note that this method does not need to lock the model of the object, this already happens in the edit method.

By default, this editor can handle the following operations:

• TLspEditOperationType.MOVE

Specified by:

editImpl in class ALspEditor

Parameters:

aOperation - the event that contains the information on how to edit the object

aInteractionStatus - the interaction status

aContext - the edit context

Returns:

The result of the operation: Whether or not there was success, and whether or not the current handles of the object should be invalidated.

getEditHandles

public List<ALspEditHandle> getEditHandles(TLspEditContext aContext)

Returns a set of handles for editing the given object.

These handles will be able to generate edit operations, that are passed to the edit method. As a way to communicate with this method, handles will copy their properties to the edit operation properties. By default this method delegates to the following methods:

• createLocationHandle
• createHeightHandle

It returns a list containing the handles returned by those methods. These methods are added for convenience, so they can easily be overridden.

Parameters:

aContext - provides context information such as the layer for which the object is being edited

Returns:

the edit handles to edit the given object, or an empty list if it should not be possible to edit the given object.

See Also:

• TLspEditController

getCreateHandle

public ALspEditHandle getCreateHandle(TLspEditContext aContext)

Returns a handle that is used to create the given object. The returned handle is used by the controller to initialize the other of the object.

Typically the returned handle is an instance of ALspCreateHandle which is a specialized handle implementation used for creating an object.

By default, this method returns an ALspCreateHandle capable of creating an ILcd2DEditablePoint, as described in the class javadoc.

Parameters:

aContext - provides context information such as the layer for which the object is being created

Returns:

an edit handle, or null if creation should not be allowed.

See Also:

• ALspCreateHandle
• TLspCreateController