jv.project
Class PjProject

java.lang.Object
  |
  +--jv.object.PsObject
        |
        +--jv.project.PjProject

All Implemented Interfaces:

java.lang.Cloneable, PsTimeListenerIf, PsUpdateIf, PvPickListenerIf, java.io.Serializable

Direct Known Subclasses:

MyProject, PjCatenoid, PjClosedPoly, PjConformal, PjConjugate, PjCurve, PjCycloid, PjElasticCurve, PjEllipse, PjEventCamera, PjEvolve, PjExprOde, PjFractalImage, PjGeodesic, PjHarmonic, PjHeight, PjHodge, PjImportModel, PjKeyframe, PjLIC, PjLife, PjLinear, PjMaxPrinciple, PjMinesweeper, PjModel, PjParmSurface, PjPickEvent, PjPlatonic, PjPolygonSet, PjRivara, PjRootFinder, PjRuler, PjSlider, PjSubdivision, PjSurface, PjTextureCube, PjTexturedSurface, PjTorusKnot, PjTransform, PjVectorField, PjWeierstrass, PnCellOperator

public class PjProject

extends PsObject

implements PsTimeListenerIf, PvPickListenerIf, PsUpdateIf

Central control class whose subclasses are application specific user projects. Projects might compute surfaces, load geometries from file, or solve differential equations. They are specialized classes making use of all the functionality available in JavaView. Projects can be used as building blocks in other projects.

The advantage of wrapping an application inside a project rather than an applet is the fact, that projects are considered as building blocks respectively modules in JavaView, which can be used by other projects to perform specific tasks. Although applets usually wrap an application but they contain too many presentation specific functionality to serve as reusable modules. An alternative to JavaView projects is the use of Java beans.

Subclasses are usually instantiated at following occasions:

1. Inside an applet and passed to the PvViewer as current project. This mainly determines the initial functionality of the applet.
2. Inside other projects to enhance their functionality. In such a case the project has usually no connection to the viewer and display.
3. Interactively through the control menu. This is similar to step 1.

If projects are registered in PvViewer, then PvViewer registers itself as parent of the project. This happens e.g. in cases 1. and 3. above, In case 2. the container project may, for example, register itself as parent. When the project is selected in PvViewer by selectProject(String), then that method in turn registers a default display and invokes the start() method of this project.

A project has a main geometry, although it may have more geometries and even a network of geometries. It may have associated displays (might not be true in future), it may have an associated animation to receive update(time) events, and it may receive pick events from an associated PvDisplay.

A project may have an animation object which handles the projects animations. If a project has an animation object, then the animation panel is shown when the project's start() method is invoked during loading of the project. Only one animation object may be set in a project, but a user might register the project in other animation objects. Use setAnimation(PsAnimation) to register an animation.

To be able to access the global viewer the project must either be registered in PvViewer using addProject() or the viewer should be set directly using setViewer().

Version:

02.02.01, 3.10 revised (kp) Flag and methods to steer auto fit added.
29.09.00, 3.00 revised (kp) Renamed to PjProject from PgProject.
03.03.00, 2.20 revised (kp) New instance variable m_viewer with access methods added.
02.01.00, 2.13 revised (kp) Method added in v2.12 removed, maybe added by subclasses.
04.10.99, 2.12 revised (ur) Four dummy methods getTimeOfFirst/Previous/Next/LastKey added.
06.06.99, 2.11 revised (kp) Bug in removeGeometry removed: set m_geometry==null if no further registered geometries.
17.05.99, 2.10 revised (kp) Method getAnimationPanel() added.
16.09.98, 2.00 revised (kp)
00.00.97, 1.00 created (kp)

Author:

Konrad Polthier

See Also:

PsTimeListenerIf, PsAnimation, PvDisplay, PvViewer, Serialized Form

Fields inherited from class jv.object.PsObject

HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_MATERIAL_PANEL, HAS_TEXTURE_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_SELECTED, IS_USED, NUM_TAGS

Constructor Summary

PjProject(java.lang.String aName)
Constructor with unique name.

Method Summary

boolean	addDisplay(PvDisplayIf display) Register a new display, e.g. to be deleted when project is removed.
boolean	addGeometry(PgGeometryIf aGeometry) Register new geometry in project and the selected display.
boolean	addGeometry(PgGeometryIf aGeometry, boolean bUpdateDisplay) Register new geometry in project and the selected display, but do not update the display if not requested.
void	dispose() Disconnect all links to other classes and prepare for deletion.
void	dragDisplay(PvPickEvent pos) Drag a location in the display with 2d display and 3d world coordinates.
void	dragInitial(PvPickEvent pos) Drag an arbitrary point along a geometry, point may lie inside an element.
void	dragVertex(PgGeometryIf geom, int vertexIndex, PdVector vertex) Drag a picked vertex of a geometry.
void	fitDisplays() Scale the current camera in all displays such that geometry fills the display.
PsAnimation	getAnimation() Get the animation object of the project which handles the projects animations.
PvDisplayIf	getDisplay() Get currently selected display.
java.util.Enumeration	getDisplays() Get all registered displays as enumeration.
PgGeometryIf	getGeometry() Get currently selected geometry of project.
PgGeometryIf	getGeometry(int anInd) Get a registered geometry with given index.
int	getNumGeometries() Get number of registered geometries of project.
java.lang.String	getParameter(java.lang.String parmLabel) Get project parameter.
PvViewerIf	getViewer() Get viewer.
boolean	hasAnimation() Check whether this project is registered as listener of an animation object.
boolean	hasDisplay(PvDisplayIf display) Check for a registered display.
void	init() Initialize and reset project, stops the running animation if any.
boolean	isEnabledAutoFit() Determine flag which determines whether scenery is scaled to fit display when start() is called.
void	markVertices(PvPickEvent markBox) Mark a set of vertices of a geometry within a given bounding box.
void	pickDisplay(PvPickEvent pos) Get a location in the display with 2d display and 3d world coordinates.
void	pickInitial(PvPickEvent pos) Pick an arbitrary point on a geometry, point may lie inside an element.
void	pickVertex(PgGeometryIf geom, int vertexIndex, PdVector vertex) Get a picked vertex of a geometry.
boolean	removeDisplay(PvDisplayIf display) Remove a registered display from list of registered displays.
void	removeGeometries() Remove all registered geometries from project and registered displays.
void	removeGeometry(PgGeometryIf aGeometry) Remove previously registered geometry from project and the selected display.
boolean	selectDisplay(PvDisplayIf disp) Select a display to become the default display to which geometries are added.
void	selectGeometry(PgGeometryIf aGeometry) Select registered geometry in the project and in the selected display.
void	setAnimation(PsAnimation anAnimation) Assign the animation object where this listener is registered.
void	setDisplay(PvDisplayIf disp) Register display, and add all geometries of project to display.
void	setEnabledAutoFit(boolean flag) Set flag which determines whether scenery is scaled to fit display when start() is called.
void	setParameter(java.lang.String[][] parm) Set project parameter.
boolean	setTime(PsTimeEvent time) Empty method, must be overwritten by subclasses to update dynamic object.
void	setViewer(PvViewerIf viewer) Set viewer for direct access to central dialogs, windows, and projects of JavaView.
void	start() Method is invoked during loading of a project in JavaView.
void	stop() Stop all animations and auto-rotation in display.
void	unmarkVertices(PvPickEvent markBox) Unmark a set of vertices of a geometry within a given bounding box.

Methods inherited from class jv.object.PsObject

addInspector, addUpdateListener, assureInspector, clearTag, clone, clone, clone, copy, getFather, getInfoPanel, getInspector, getName, getNumObjects, hasInspector, hasTag, hasUpdateListener, instanceOf, instanceOf, removeInspector, removeUpdateListener, setName, setParent, setTag, toString, update, updatePanels

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface jv.anim.PsTimeListenerIf

getName

Methods inherited from interface jv.project.PvPickListenerIf

getName

Methods inherited from interface jv.object.PsUpdateIf

getFather, getName, setParent, update

Constructor Detail

PjProject

public PjProject(java.lang.String aName)

Constructor with unique name.

Method Detail

init

public void init()

Initialize and reset project, stops the running animation if any. Does not reset any registered display nor geometry. They must be reset individually in each subclass.

Overrides:

init in class PsObject

dispose

public void dispose()

Disconnect all links to other classes and prepare for deletion. After this call the object cannot be reinvoked using init().

start

public void start()

Method is invoked during loading of a project in JavaView.

If a project has an animation object, then the animation panel is shown when the project's this start() method is invoked during loading of the project. Use setAnimation(PsAnimation) to register an animation.

If auto fit is enabled then scenery is scaled to fit in each display.

See Also:

PvViewerIf.start(), #isEnabledAutoFit(boolean)

stop

public void stop()

Stop all animations and auto-rotation in display. Hide animation panel, remove itself as pick listener from displays. The object can be reinvoked using init() and start().

See Also:

PvViewerIf.stop()

isEnabledAutoFit

public boolean isEnabledAutoFit()

Determine flag which determines whether scenery is scaled to fit display when start() is called. On default, auto fit is enabled.

See Also:

setEnabledAutoFit(boolean)

setEnabledAutoFit

public void setEnabledAutoFit(boolean flag)

Set flag which determines whether scenery is scaled to fit display when start() is called. On default, auto fit is enabled.

See Also:

#isEnabledAutoFit(boolean)

getViewer

public PvViewerIf getViewer()

Get viewer. Viewer manages the 3d-displays, control window, and list of projects. It is the central class in JavaView, and usually created at the beginning of an applet or application. This instance variable gives access to PvViewer, e.g. to show/hide dialogs and panels.

See Also:

PsViewerIf, PvViewer.PvViewer(Applet, Frame)

setViewer

public void setViewer(PvViewerIf viewer)

Set viewer for direct access to central dialogs, windows, and projects of JavaView. Viewer manages the 3d-displays, control window, and list of projects. It is the central class in JavaView, and usually created at the beginning of an applet or application. This instance variable gives access to PvViewer, e.g. to show/hide dialogs and panels.

See Also:

getViewer(), PvViewerIf, PvViewer.PvViewer(Applet, Frame)

getParameter

public java.lang.String getParameter(java.lang.String parmLabel)

Get project parameter.

setParameter

public void setParameter(java.lang.String[][] parm)

Set project parameter.

pickDisplay

public void pickDisplay(PvPickEvent pos)

Get a location in the display with 2d display and 3d world coordinates. Point may be independent of any geometry. This method does nothing and must be overwritten.

Specified by:

pickDisplay in interface PvPickListenerIf

Parameters:

pos - Pick event issued by the display

See Also:

PvPickListenerIf

dragDisplay

public void dragDisplay(PvPickEvent pos)

Drag a location in the display with 2d display and 3d world coordinates. Point may be independent of any geometry. This method invokes pickDisplay() and should be overwritten.

Specified by:

dragDisplay in interface PvPickListenerIf

Parameters:

pos - Pick event issued by the display

See Also:

PvPickListenerIf

pickInitial

public void pickInitial(PvPickEvent pos)

Pick an arbitrary point on a geometry, point may lie inside an element. This method does nothing and must be overwritten.

Specified by:

pickInitial in interface PvPickListenerIf

Parameters:

pos - Pick event issued by the display

See Also:

PvPickListenerIf

dragInitial

public void dragInitial(PvPickEvent pos)

Drag an arbitrary point along a geometry, point may lie inside an element. This method invokes pickInitial() and should be overwritten.

Specified by:

dragInitial in interface PvPickListenerIf

Parameters:

pos - Pick event issued by the display

See Also:

PvPickListenerIf

pickVertex

public void pickVertex(PgGeometryIf geom,
                       int vertexIndex,
                       PdVector vertex)

Get a picked vertex of a geometry. This method does nothing and must be overwritten.

Specified by:

pickVertex in interface PvPickListenerIf

Parameters:

geom - Picked geometry on which vertex lies

index - Index of vertex in vertex array of geometry

vertex - 3d coordinates of vertex position

See Also:

PvPickListenerIf

dragVertex

public void dragVertex(PgGeometryIf geom,
                       int vertexIndex,
                       PdVector vertex)

Drag a picked vertex of a geometry. This method invokes pickVertex() and should be overwritten.

Specified by:

dragVertex in interface PvPickListenerIf

Parameters:

geom - Picked geometry on which vertex lies

index - Index of vertex in vertex array of geometry

vertex - 3d coordinates of vertex position

See Also:

PvPickListenerIf

markVertices

public void markVertices(PvPickEvent markBox)

Mark a set of vertices of a geometry within a given bounding box.

Specified by:

markVertices in interface PvPickListenerIf

Parameters:

markBox - contains four coplanar points on the bounding prism, and direction of prism.

unmarkVertices

public void unmarkVertices(PvPickEvent markBox)

Unmark a set of vertices of a geometry within a given bounding box.

Specified by:

unmarkVertices in interface PvPickListenerIf

Parameters:

markBox - contains four coplanar points on the bounding prism, and direction of prism.

addGeometry

public boolean addGeometry(PgGeometryIf aGeometry)

Register new geometry in project and the selected display. The display is updated after this call. This method simply calls addGeometry(aGeometry, true).

Parameters:

aGeometry - geometry to be added to this project and the current display.

Returns:

false if geometry was null or already registered in project.

addGeometry

public boolean addGeometry(PgGeometryIf aGeometry,
                           boolean bUpdateDisplay)

Register new geometry in project and the selected display, but do not update the display if not requested. If this method is used then a call like m_display.update(m_display) must be issued sometime when all geometries have been registered.

Even if the geometry was previously added to this project, this method re-registers in the display since it might have been deleted in the display.

The update of the display is performed only if the argument geometry is not already registered in the display.

Parameters:

aGeometry - geometry to be added to this project and the current display.

bUpdateDisplay - flag whether display shall be updated when geometry is added.

Returns:

false if geometry was null or already registered in project.

removeGeometry

public void removeGeometry(PgGeometryIf aGeometry)

Remove previously registered geometry from project and the selected display.

selectGeometry

public void selectGeometry(PgGeometryIf aGeometry)

Select registered geometry in the project and in the selected display.

Specified by:

selectGeometry in interface PvPickListenerIf

removeGeometries

public void removeGeometries()

Remove all registered geometries from project and registered displays.

getNumGeometries

public int getNumGeometries()

Get number of registered geometries of project.

See Also:

addGeometry(PgGeometryIf)

getGeometry

public PgGeometryIf getGeometry(int anInd)

Get a registered geometry with given index. Geometries are ordered like a vector, i.e. geometries added later have larger index. Index may change if geometries are removed.

See Also:

addGeometry(PgGeometryIf)

getGeometry

public PgGeometryIf getGeometry()

Get currently selected geometry of project. Subclasses should return the major geometry offered to other module projects.

See Also:

selectGeometry(PgGeometryIf)

getAnimation

public PsAnimation getAnimation()

Get the animation object of the project which handles the projects animations. This listener may only have a single animation object which is assigned by the animation object when this listener is registered using setAnimation(PsAnimation).

Specified by:

getAnimation in interface PsTimeListenerIf

See Also:

hasAnimation(), setAnimation(PsAnimation)

hasAnimation

public boolean hasAnimation()

Check whether this project is registered as listener of an animation object.

Specified by:

hasAnimation in interface PsTimeListenerIf

See Also:

getAnimation(), setAnimation(PsAnimation)

setAnimation

public void setAnimation(PsAnimation anAnimation)

Assign the animation object where this listener is registered. This method is invoked by the animation object during registration of this listener, and usually is not required to be called by a user. If this listener has an assigned animation object, then its animation panel may be shown to change the current time of this listener.

If this project has an animation object assigned in its constructor or init() method, then the animation panel is shown when the project's start() method is invoked during loading of the project.

Only one animation object may be assigned to this listener. Subsequent assignments will replace the previous assignment.

Specified by:

setAnimation in interface PsTimeListenerIf

See Also:

getAnimation(), hasAnimation()

setTime

public boolean setTime(PsTimeEvent time)

Empty method, must be overwritten by subclasses to update dynamic object.

Specified by:

setTime in interface PsTimeListenerIf

fitDisplays

public void fitDisplays()

Scale the current camera in all displays such that geometry fills the display.

setDisplay

public void setDisplay(PvDisplayIf disp)

Register display, and add all geometries of project to display. Currently selected geometry of project is selected display.

Project registers itself as pick listener of the display.

For example, method is called from PvViewer when display exists and project is selected, or when default display is requested from PvViewer from somewhere else.

See Also:

addDisplay(PvDisplayIf)

getDisplay

public PvDisplayIf getDisplay()

Get currently selected display. Geometries, which are added to a project, are automatically added to the currently selected display.

See Also:

selectDisplay(PvDisplayIf)

selectDisplay

public boolean selectDisplay(PvDisplayIf disp)

Select a display to become the default display to which geometries are added. The selected display should be the main display of a project, and usually does not change during a program run. The selected display of a project does not change when the window focus is changed interactively - these are two different concepts.

For example, method is called from PvViewer when display exists and project is selected, or when default display is requested from PvViewer from somewhere else.

See Also:

setDisplay(PvDisplayIf)

addDisplay

public boolean addDisplay(PvDisplayIf display)

Register a new display, e.g. to be deleted when project is removed.

Note: project is not registered as pick listener in display neither are any geometries automatically registered in display. This should all be done by hand.

Returns:

false if instance already registered.

See Also:

getDisplays()

getDisplays

public java.util.Enumeration getDisplays()

Get all registered displays as enumeration.

Returns:

Enumeration of registered displays, null if no displays found.

See Also:

addDisplay(PvDisplayIf)

hasDisplay

public boolean hasDisplay(PvDisplayIf display)

Check for a registered display.

Returns:

true if registered display found.

See Also:

addDisplay(PvDisplayIf), getDisplays()

removeDisplay

public boolean removeDisplay(PvDisplayIf display)

Remove a registered display from list of registered displays. For example, method is called from PvDisplay when removing the geometry from the display.

Parameters:

Display -

Returns:

false if display does not exists.

See Also:

addDisplay(PvDisplayIf)