Package com.luciad.view.gxy.controller

Class ALcdGXYNewControllerModel2

java.lang.Object

com.luciad.view.gxy.controller.ALcdGXYNewControllerModel2

All Implemented Interfaces:

ILcdUndoableSource

Direct Known Subclasses:

ALcdAPP6AGXYNewControllerModel, ALcdMS2525bGXYNewControllerModel, ALcyGXYNewControllerModel

public abstract class ALcdGXYNewControllerModel2
extends Object
implements ILcdUndoableSource

Contains the logic for creating objects on an ILcdGXYView.

Once a defining position is decided upon (e.g. by a mouse click), the method getGXYLayer is called to retrieve a relevant layer and a new, uninitialized object is created using the method create.

Further initialization steps (e.g. by a mouse click), are executed by the method edit, which by default delegates the real work to the ILcdGXYEditor of the object. Finally, when the creation finishes, the commit method ensures that the object is added to a model and/or layer. From this moment on, visualization of and interaction with the object is typically handed over to the layer.

While the creation process is ongoing (e.g., the user is moving the mouse), the objects are not edited all the time, they are just painted in their temporary state. The method paint takes care of this. This method is typically invoked often (e.g. on mouse move) while the creation process is ongoing.

At all times - before an edit, during an edit or after an edit - the correct mouse cursor is provided by the method mouseCursor.

This controller model fires undoable events for every edit step by reusing the undoable events fired by the ILcdGXYEditors, or by cloning the object if the editor does not implement ILcdUndoableSource.

Since:

9.0

See Also:

• TLcdGXYNewController2

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	ALcdGXYNewControllerModel2.CreationStatus	A description of the creation status an object is in, used to make decisions on whether a certain input event should trigger editing or other operations.
static class	ALcdGXYNewControllerModel2.SnapTargetInfo	Object representing all needed information about a snap target.

Constructor Summary

Constructors

Constructor	Description
ALcdGXYNewControllerModel2()	Creates an new instance, ready to be used with a TLcdGXYNewController2 controller.

Method Summary

Modifier and Type	Method	Description
void	addUndoableListener(ILcdUndoableListener aListener)	Adds a listener to this source, so this listener is notified when something undoable has happened.
void	cancel(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Cancels creation of the object.
void	commit(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Commits the created object.
abstract Object	create(int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Creates an uninitialized model object, ready for editing.
protected ILcdUndoable	createCommitUndoable(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Creates a new ILcdUndoable for committing the given object.
Object	edit(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Performs an edit operation on the object, given the context parameters.
protected void	fireUndoableHappened(ILcdUndoable aUndoable)	Notifies all undoable listeners that aUndoable has happened.
ALcdGXYNewControllerModel2.CreationStatus	getCreationStatus(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Returns the creation status of the object being created.
abstract ILcdGXYLayer	getGXYLayer(Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Returns a suitable layer for creating an object.
ILcdStringTranslator	getStringTranslator()	Returns the ILcdStringTranslator set on this controller model.
Cursor	mouseCursor(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Returns the desired cursor for the given parameters, or null if no specific cursor is needed.
void	paint(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Paints the object being created.
void	removeUndoableListener(ILcdUndoableListener aListener)	Removes the specified listener so it is no longer notified.
void	setStringTranslator(ILcdStringTranslator aStringTranslator)	Sets the ILcdStringTranslator that this controller model should use to translate the Strings that will be visible in the user interface.
boolean	shouldCommit(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Deprecated. This method depends on the kind of input (in this case a mouseEvent).
boolean	shouldEdit(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Deprecated. This method depends on the kind of input (in this case a mouseEvent).
boolean	shouldUndo(Object aObject, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Deprecated. This method depends on the kind of input (in this case a mouseEvent).
protected ALcdGXYNewControllerModel2.SnapTargetInfo	snapTarget(Object aObjectToSnap, int aEditCount, Graphics aGraphics, MouseEvent aMouseEvent, ILcdGXYLayerSubsetList aSnappables, ILcdGXYContext aContext)	Tries to retrieve a snap target from the given aSnappables.

Methods inherited from class java.lang.Object

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

Constructor Details

ALcdGXYNewControllerModel2

public ALcdGXYNewControllerModel2()

Creates an new instance, ready to be used with a TLcdGXYNewController2 controller.

Method Details

getGXYLayer

public abstract ILcdGXYLayer getGXYLayer(Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Returns a suitable layer for creating an object. The layer is made available in the other method calls through the ILcdGXYContext object.

This method may be called several times during the creation process; upon the first call, aContext.getGXYLayer will return null. If the controller model does not support changing the layer during creation (e.g. due to incompatible objects), it should return aContext.getGXYLayer when this is not null.

Parameters:

aGraphics - the graphics onto which created objects will be painted

aMouseEvent - the mouse event causing the edit operation, or null if another input method is used.

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

a suitable layer to create an object for

See Also:

• create(int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)

create

public abstract Object create(int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Creates an uninitialized model object, ready for editing. The object may be edited and cloned several times before it is added to a model by the commit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext) method.

Parameters:

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which created objects will be painted

aMouseEvent - the mouse event causing the edit operation, or null if another input method is used

aSnappables - the list of potential snap targets

aContext - the GXY context information, including the layer to create the object for

Returns:

an uninitialized model object that may be edited and cloned, or null to cancel the creation process.

See Also:

• edit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)
• getGXYLayer(java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)
• commit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)

edit

public Object edit(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Performs an edit operation on the object, given the context parameters. The default implementation uses the object's editor, snapping when possible.

Parameters:

aObject - the object to edit

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event causing the edit operation, or null if another input method is used

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

an edited version of aObject, or null if no edit was performed

See Also:

• create(int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)
• shouldEdit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)
• commit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)

commit

public void commit(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Commits the created object. From this moment on, the object is no longer under creation. Hence, no further edit operations are performed, and the object will no longer be painted by this controller model. The default implementation adds the object to the context's layer, taking a write lock on the layer's model. Also, an undoable is created using createCommitUndoable(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext) and fired and the object is selected.

Parameters:

aObject - the object to edit

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event causing the edit operation, or null if another input method is used.

aSnappables - the list of potential snap targets

aContext - the GXY context information

See Also:

• shouldCommit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)

createCommitUndoable

protected ILcdUndoable createCommitUndoable(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Creates a new ILcdUndoable for committing the given object. The default implementation creates an undoable with display name "Create {0}", translated with the set ILcdStringTranslator and the domain object's toString value. The undo operation removes the object from the model. The default redo behavior re-inserts the object into the layer.

Parameters:

aObject - the object to edit

aEditCount - a list of previous versions of the object. These versions are acquired when calling the edit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext) operation.

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event causing the edit operation, or null if another input method is used.

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

the undoable for comitting the given object.

See Also:

• commit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)

cancel

public void cancel(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Cancels creation of the object. From this moment on, the object is no longer under creation. Hence, no further edit operations are performed, and the object will no longer be painted by this controller model. The default implementation does nothing.

Parameters:

aObject - the object to edit

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event causing the edit operation, or null

aSnappables - the list of potential snap targets

aContext - the GXY context information

paint

public void paint(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Paints the object being created. The default implementation paints the object using ILcdGXYPainter.BODY | ILcdGXYPainter.CREATING as render mode, and adds snaps when necessary.

Parameters:

aObject - the object being edited

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the last relevant mouse event before calling this method, or null if another input method is used.

aSnappables - the list of potential snap targets

aContext - the GXY context information

shouldEdit

public boolean shouldEdit(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Deprecated.

This method depends on the kind of input (in this case a mouseEvent). To allow using existing controller models for other kinds of input (eg. touchEvents), this method should be moved to the (input specific) controller. The method is deprecated here because the controller should decide when to edit. See TLcdGXYNewController2.shouldEdit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext).

Returns whether the mouse event should trigger an edit of the object, given the context parameters. The default implementation returns true for left and right single clicks, and also for drag operations that have not been preceded by clicks.

Parameters:

aObject - the object that may be edited

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event that is eligible for causing an edit operation

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

true if the object should be edited

See Also:

• getCreationStatus(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)
• edit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)

shouldUndo

public boolean shouldUndo(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Deprecated.

This method depends on the kind of input (in this case a mouseEvent). To allow using existing controller models for other kinds of input (eg. touchEvents), this method should be moved to the (input specific) controller. The method is deprecated here because the controller should decide when to undo. See TLcdGXYNewController2.shouldUndo(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext).

Returns whether the mouse event should undo the last edit operation, given the context parameters. The default implementation always returns false.

Parameters:

aObject - the object that may be reverted

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event that is eligible for causing a revert operation

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

true if the object should be committed

See Also:

• edit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)

shouldCommit

public boolean shouldCommit(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Deprecated.

This method depends on the kind of input (in this case a mouseEvent). To allow using existing controller models for other kinds of input (eg. touch events), this method should be moved to the (input specific) controller. The method is deprecated here because the controller should decide when to commit. See TLcdGXYNewController2.shouldCommit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext).

Returns whether the mouse event should trigger a commit of the object, given the context parameters. The default implementation uses the getCreationStatus(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext) method and returns true in any of the following cases:

• the object is FINISHED and a left-drag operation is not ongoing
• the object is COMMITTABLE and the mouse event is a right click, a double left click, or the end of a left-drag operation that has not been preceded by a click operation

Parameters:

aObject - the object that may be committed

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event that is eligible for causing a commit operation

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

true if the object should be committed

See Also:

• getCreationStatus(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)
• commit(java.lang.Object, int, java.awt.Graphics, java.awt.event.MouseEvent, com.luciad.view.gxy.ILcdGXYLayerSubsetList, com.luciad.view.gxy.ILcdGXYContext)

getCreationStatus

public ALcdGXYNewControllerModel2.CreationStatus getCreationStatus(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Returns the creation status of the object being created.
After a number of interactions the object might be finished (for example, a circle for instance can be created using two points: the center and one of the points on its outer rim). If that's the case the created domain object can be immediately committed and added to the layer. There are however some objects that can't be finished within a set amount of steps (for example, when creating a polyline, yu can add as many points as you want). For those cases we have the ALcdGXYNewControllerModel2.CreationStatus.COMMITTABLE status. The default implementation compares the edit count with the editor's creation click count.

Parameters:

aObject - the object being edited

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event that is causing the method call, or null if another input method is used.

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

UNCOMMITTABLE if more editing steps are required, COMMITTABLE if more editing steps are optional, FINISHED if no more clicks can be accepted.

See Also:

• ALcdGXYNewControllerModel2.CreationStatus
• ILcdGXYEditor.getCreationClickCount()

snapTarget

protected ALcdGXYNewControllerModel2.SnapTargetInfo snapTarget(Object aObjectToSnap,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Tries to retrieve a snap target from the given aSnappables. It does so by invoking snapTarget. If the snap target returned by the painter is accepted by the ILcdGXYEditor of aObjectToSnap, it is returned.

When no snap target can be found this method returns null.

Parameters:

aObjectToSnap - the object that would like to snap to one of the candidates in aSnappables, so basically the object that is being edited.

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event that is causing the method call, or null if another input method is used.

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

The snap info.

mouseCursor

public Cursor mouseCursor(Object aObject,
 int aEditCount,
 Graphics aGraphics,
 MouseEvent aMouseEvent,
 ILcdGXYLayerSubsetList aSnappables,
 ILcdGXYContext aContext)

Returns the desired cursor for the given parameters, or null if no specific cursor is needed.

The default implementation returns null.

Parameters:

aObject - the object under creation

aEditCount - the number of previous edit operations

aGraphics - the graphics onto which the object is painted

aMouseEvent - the mouse event causing this method call

aSnappables - the list of potential snap targets

aContext - the GXY context information

Returns:

a suitable cursor, or null to use a default cursor

addUndoableListener

public void addUndoableListener(ILcdUndoableListener aListener)

Description copied from interface: ILcdUndoableSource

Adds a listener to this source, so this listener is notified when something undoable has happened.

Specified by:

addUndoableListener in interface ILcdUndoableSource

Parameters:

aListener - The listener to be notified when something undoable has happened.

removeUndoableListener

public void removeUndoableListener(ILcdUndoableListener aListener)

Description copied from interface: ILcdUndoableSource

Removes the specified listener so it is no longer notified.

Specified by:

removeUndoableListener in interface ILcdUndoableSource

Parameters:

aListener - The listener to remove.

fireUndoableHappened

protected void fireUndoableHappened(ILcdUndoable aUndoable)

Notifies all undoable listeners that aUndoable has happened.

Parameters:

aUndoable - The undoable of which the listeners should be notified.

getStringTranslator

public ILcdStringTranslator getStringTranslator()

Returns the ILcdStringTranslator set on this controller model.

Returns:

The translator set on this controller model. Never null.

setStringTranslator

public void setStringTranslator(ILcdStringTranslator aStringTranslator)

Sets the ILcdStringTranslator that this controller model should use to translate the Strings that will be visible in the user interface.

The following list of Strings are translated by the given instance:

• "Creation step"
• "Create {0}". The translated String is used as the pattern for a MessageFormat.
• "Undo {0}". The translated String is used as the pattern for a MessageFormat.
• "Redo {0}". The translated String is used as the pattern for a MessageFormat.

Parameters:

aStringTranslator - The ILcdStringTranslator that should be used. Must not be null.