* In this project a classes is embedded in a JavaView project. Nearly all applications * in JavaView are embedded into projects, each with a special functionality. Such * projects can be reused as a building blocks in other cirumstances, similar to a class. * In fact, a project is a subclass of {@link jv.project.PjProject jv.project.PjProject} * which allows to manage a set of geometries, a display(s), and other projects, and * to react on animation and pick events. *
* This project also shows how to work with animations. Here an instance of class
* {@link jv.anim.PsAnimation PsAnimation} is created where the current project registers
* itself as dynamic object to be able to receive time events. Whenever the time changes
* the animation manager invokes the method {@link #setTime(PsTimeEvent) setTime(PsTimeEvent)} of
* this project.
*
* @see jv.anim.PsAnimation
* @see jv.geom.PgElementSet
* @see jv.project.PjProject
* @author Konrad Polthier
* @version 25.02.01, 1.51 revised (kp) Obsolete call to method setAnimation() removed.
* 28.11.00, 1.50 revised (kp) Applet simplified for beginners.
* 05.08.99, 1.00 created (kp)
*/
public class MyProject extends PjProject {
protected MySurface m_geom; // Surface of geometry
protected PuInteger m_numULines; // Discretization along u parameter line with slider
protected PuInteger m_numVLines; // Discretization along v parameter line with slider
/**
* Constructor, without arguments to allow loading of project from menu.
*/
public MyProject() {
super("MyProject");
m_geom = new MySurface(); // Create an own geometry
m_geom.setName("Catenoid"); // Optionally, give it a name
PsAnimation anim = new PsAnimation(); // Create an animation, which sends timer events
anim.setName("Associate Family"); // Set title of the animation dialog.
anim.addTimeListener(this); // Register this project in animation to receive setTime(time) events.
// In return, the animation automatically registers itself in this project's superclass
// since the superclass implements the interface PsTimeListenerIf. This enables this
// class to access the animation class using super.getAnimation(), and it enables the
// user to access the animation panel within the display via ctrl-a or menu.
// Create integers with given label and this project as parent, i.e. sliders
// are now children of this project and send update(Object) to project whenever they change.
m_numULines = new PuInteger("Number u-Lines", this);
m_numVLines = new PuInteger("Number v-Lines", this);
init(); // Call to init() is required.
}
/**
* Do initialization of data structures; method is also used to reset instances.
*/
public void init() {
super.init();
// Initialize integers bounds and values.
m_numULines.setDefBounds(2, 50, 1, 5);
m_numULines.setDefValue(15);
m_numULines.init();
m_numVLines.setDefBounds(2, 50, 1, 5);
m_numVLines.setDefValue(9);
m_numVLines.init();
m_geom.setGlobalElementColor(new Color(255, 37, 113));
m_geom.showElementColors(false);
m_geom.setGlobalElementBackColor(new Color(200, 200, 0));
m_geom.showElementBackColor(true);
m_geom.computeSurface(m_numULines.getValue(), m_numVLines.getValue()); // Compute initial surface
}
/**
* Start project, e.g. start an animation. Method is called once when project is
* selected in PvViewer#selectProject(). Method is optional. For example, if an
* applet calls the start() method of PvViewer, then PvViewer tries to invoke
* the start() method of the currently selected project.
*/
public void start() {
addGeometry(m_geom);
selectGeometry(m_geom);
if (super.hasAnimation()) {
PsAnimation anim = super.getAnimation();
anim.setTimeInterval(0., 720., 10., 20.);
anim.getAnimationPanel().setVisible(true); // Show anmiation panel
anim.start(); // Start animation
}
super.start();
}
/**
* Method is called from animation(-panel) whenever time has changed
* since this project is registered as dynamic object in the animation.
* Method is optional, but allows a project to update geometry to new current time.
*/
public boolean setTime(PsTimeEvent timeEvent) {
double time = timeEvent.getTime();
m_geom.computeAnimation(time); // Compute new vertices of geometry
m_geom.update(m_geom); // Send update to geometry to refresh display
return super.update(this); // Update info panel of this project
}
/**
* Update method of project to react on changes in its panel or of its children.
* This method is optional, but required if project is parent of a child.
* Project becomes parent if child calls child.setParent(this) with
* this project as argument. For example, see the constructor of MyProject.
* Project must react on child events, or forward them to its superclass.
*
* Catch events of integer children and recompute surface. */ public boolean update(Object event) { if (event == getInfoPanel()) { m_geom.computeSurface(m_numULines.getValue(), m_numVLines.getValue()); // Recompute surface m_geom.update(m_geom); return super.update(this); } else if (event==m_numULines || event==m_numVLines) { m_geom.computeSurface(m_numULines.getValue(), m_numVLines.getValue()); // Recompute surface m_geom.update(m_geom); return super.update(this); } return super.update(event); } }