/**
* Updates the list of drawers registered to the graphics panel. There are one drawer per layer
* including the background and foreground layers that need to be registered.
*/
private void updateGraphicsPanelDrawers() {
if (layers
== null) { // case where there is no other layer than the foreground and the background
Drawer[] drawers = {backgroundLayer, foregroundLayer};
graphicsPanel.setDrawers(drawers);
} else { // case where there are other layers
Drawer[] drawers = new Drawer[layers.size() + 2];
drawers[0] = backgroundLayer;
int i = 1;
// we want to draw the layers in reverse order because the first layers
// of the list should be on top
for (int j = layers.size() - 1; j >= 0; j--) {
Drawer currentDrawer = layers.getLayers()[j];
drawers[i] = currentDrawer;
i++;
}
drawers[i] = foregroundLayer;
graphicsPanel.setDrawers(drawers);
}
}
/**
* Method used for serialization
*
* @param out
* @throws IOException
*/
private void writeObject(ObjectOutputStream out) throws IOException {
out.writeInt(SAVED_FORMAT_VERSION_NUMBER);
out.writeInt(trackNumber);
out.writeObject(backgroundLayer);
out.writeObject(foregroundLayer);
// write the number of layers
if ((layers == null) || layers.isEmpty()) {
out.writeInt(0);
} else {
out.writeInt(layers.size());
out.writeObject(layers);
// make sure the active layer is not null
if (activeLayer == null) {
setActiveLayer(layers.getLayers()[0]);
}
out.writeObject(activeLayer);
}
out.writeObject(score);
// save the height of the track
out.writeInt(trackPanel.getHeight());
if (SAVED_FORMAT_VERSION_NUMBER >= 1) {
out.writeObject(getName());
}
}