/*
* BSXDisplay -- a graphics component for drawing BSX Objects on
* --
* $Id: BSXDisplay.java,v 1.1 1997/12/16 10:59:49 leo Exp $
* $timestamp: Thu Feb 15 00:47:34 1996 by Matthias L. Jugel :$
*/
package modules.bsx;
import java.awt.*;
import java.util.Hashtable;
import java.util.Enumeration;
import java.util.Vector;
public class BSXDisplay extends Frame
{
private int Scale = 100; /* display scale */
private Hashtable scenes; /* scene store */
private Hashtable objects; /* object store */
private String curScene = ""; /* current scene */
private Image imageBuffer;
private Graphics gBuffer;
public BSXDisplay() { this("BSXModule - Visit Regenbogen rb.mud.de:4780"); }
public BSXDisplay(String title) {
super(title);
addNotify();
imageBuffer = createImage(511,255);
if(imageBuffer==null) {
System.out.println("Couldn't create an offscreen-image :(");
System.exit(1);
}
gBuffer = imageBuffer.getGraphics();
scenes = new Hashtable();
objects = new Hashtable();
setScale(100);
resize(510,255);
show();
}
public void setScale(int scale) {
Scale = scale;
resize(511 * Scale / 100, 255 * Scale / 100);
}
/* add a scene to the store, do not yet display */
public void addScene(String id, BSXGraphic picture)
{
BSXScene scene = new BSXScene(picture);
BSXScene sc = (BSXScene)scenes.get(id);
if(sc != null)
{
scene.objects = sc.objects;
scenes.remove(id);
}
scenes.put(id, scene);
if(curScene.equals(id)) redraw();
}
/* show current scene */
public boolean showScene() { return showScene(curScene); }
/* show scene given as argument */
public boolean showScene(String id)
{
curScene = id;
if(!scenes.containsKey(id))
{
addScene(id, new BSXGraphic());
return false;
}
redraw();
return true;
}
/* add object to store */
public void addObject(String id, BSXGraphic o)
{
objects.put(id, o);
BSXScene scene = (BSXScene)scenes.get(curScene);
if(scene != null && scene.objects.containsKey(id)) redraw();
}
/* show object at position 0, layer 0 */
public boolean showObject(String id) { return showObject(id, 0, 0); }
/* show object at position in layer */
public boolean showObject(String id, int position, int layer)
{
BSXScene scene = (BSXScene)scenes.get(curScene);
/* add object to scene database */
if((scene = (BSXScene)scenes.get(curScene)) == null)
{
addScene(curScene, new BSXGraphic());
scene = (BSXScene)scenes.get(curScene);
}
BSXObject o = new BSXObject(position, layer);
scene.objects.put(id, o);
/* check if object is in our database */
if(!objects.containsKey(id)) return false;
redraw();
return true;
}
/* remove object from scene, if scene exists */
public boolean removeObject(String id)
{
BSXScene scene = (BSXScene)scenes.get(curScene);
if(scene != null)
{
BSXObject o = (BSXObject)scene.objects.get(id);
scene.objects.remove(id);
if(o != null)
redraw();
}
return true;
}
/* redraw image buffer */
public void redraw()
{
BSXScene scene = (BSXScene)scenes.get(curScene);
if(scene == null) return;
Vector[] layer = new Vector[8];
/* create layers */
for(Enumeration e = scene.objects.keys(); e.hasMoreElements();)
{
String key; key = (String)e.nextElement();
BSXObject o = (BSXObject)scene.objects.get(key);
if(layer[o.layer] == null) layer[o.layer] = new Vector();
layer[o.layer].addElement(key);
}
/* draw background graphic */
if(scene.background != null && scene.background.size() > 0)
drawPicture(scene.background);
else
return;
/* display layers from back to front */
for(int l = 7; l >= 0; l--)
if(layer[l] != null)
for(int o = layer[l].size()-1; o >= 0; o--)
{
BSXObject obj = (BSXObject)
scene.objects.get(layer[l].elementAt(o));
drawPicture((BSXGraphic)objects.get(layer[l].elementAt(o)),
16 * obj.position, 4 * obj.layer);
}
paint(getGraphics());
}
public Point Translate(int x, int y,
int centreX, int centreY, int scale)
{
return new Point(( x - 127 + centreX) * 2 * scale / 100,
(255 - (y - 127 + centreY)) * scale / 100);
}
public void drawPicture(BSXGraphic pic) { drawPicture(pic, 127, 127); }
public void drawPicture(BSXGraphic pic, int position, int layer)
{
if(pic == null) return;
int ap = pic.size();
for(int i = 0; i < ap; i++)
{
BSXPolygon poly = (BSXPolygon)pic.elementAt(i);
Polygon p = new Polygon();
gBuffer.setColor(poly.getColor());
for(int j = poly.npoints - 1; j >= 0; j--)
{
Point pt = Translate(poly.xpoints[j], poly.ypoints[j],
position, layer, Scale);
p.addPoint(pt.x, pt.y);
}
gBuffer.fillPolygon(p);
}
}
public boolean mouseEnter(Event evt, int x, int y)
{
//System.out.println("MOUSE ENTERS");
requestFocus();
return true;
}
public void update(Graphics g)
{
paint(g);
}
public void paint(Graphics g)
{
g.drawImage(imageBuffer, 0, 0, this);
}
}
