/**
* Paints all the objects.
*
* <p>Must be synchronized on the World.lock.
*/
public void paintObjects(Graphics2D g) {
Set<Actor> objects = WorldVisitor.getObjectsListInPaintOrder(world);
int paintSeq = 0;
for (Iterator<Actor> iter = objects.iterator(); iter.hasNext(); ) {
Actor thing = iter.next();
int cellSize = WorldVisitor.getCellSize(world);
GreenfootImage image = ActorVisitor.getDisplayImage(thing);
if (image != null) {
ActorVisitor.setLastPaintSeqNum(thing, paintSeq++);
double halfWidth = image.getWidth() / 2.;
double halfHeight = image.getHeight() / 2.;
AffineTransform oldTx = null;
try {
int ax = ActorVisitor.getX(thing);
int ay = ActorVisitor.getY(thing);
double xCenter = ax * cellSize + cellSize / 2.;
int paintX = (int) Math.floor(xCenter - halfWidth);
double yCenter = ay * cellSize + cellSize / 2.;
int paintY = (int) Math.floor(yCenter - halfHeight);
int rotation = ActorVisitor.getRotation(thing);
if (rotation != 0) {
// don't bother transforming if it is not rotated at
// all.
oldTx = g.getTransform();
g.rotate(Math.toRadians(rotation), xCenter, yCenter);
}
ImageVisitor.drawImage(image, g, paintX, paintY, this, true);
} catch (IllegalStateException e) {
// We get this if the object has been removed from the
// world. That can happen when interactively invoking a
// method that removes an object from the world, while the
// scenario is executing.
}
// Restore the old state of the graphics
if (oldTx != null) {
g.setTransform(oldTx);
}
}
}
}
/**
* If it is a new actor, that has not been added to the world yet, the dragging is handled here.
*/
public boolean drag(Object o, Point p) {
Insets insets = getInsets();
Point p2 = new Point(p.x - insets.left, p.y - insets.top);
if (o instanceof Actor && ActorVisitor.getWorld((Actor) o) == null) {
if (!getVisibleRect().contains(p)) {
return false;
}
if (o != dragActor) {
// It is the first time we are dragging this actor. Create the drag image.
dragActor = (Actor) o;
dragImage =
GreenfootUtil.createDragShadow(ActorVisitor.getDragImage(dragActor).getAwtImage());
}
dragLocation = p2;
repaint();
return true;
} else if (dropTargetListener != null) {
return dropTargetListener.drag(o, p2);
} else {
return false;
}
}