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package jcgp.gui.handlers;
import javafx.event.EventHandler;
import javafx.scene.input.MouseEvent;
import jcgp.backend.population.Gene;
import jcgp.gui.GUI;
import jcgp.gui.population.GUIGene;
import jcgp.gui.population.GUIGene.GUIGeneState;
import jcgp.gui.population.GUINode;
/**
* Holds the handlers that define the behaviour of {@code GUINode}.
* <br><br>
* The handlers are instantiated here statically and added to {@code GUINode}
* instances using {@code NodeHandlers.addHandlers(...)}. This guarantees that
* all nodes behave the same way without instantiating a new set of handlers for
* each node instance.
*
* @author Eduardo Pedroni
*
*/
public final class NodeHandlers {
/**
* Set the node to {@code GUIGeneState.HOVER} state, and set its immediate connections to {@code GUIGeneState.EXTENDED_HOVER}.
*/
private static EventHandler<MouseEvent> mouseEnteredHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
// acquire the source, we can safely cast it to GUINode
GUINode source = (GUINode) event.getSource();
source.setState(GUIGeneState.HOVER);
for (int i = 0; i < GUI.resources.arity(); i++) {
((GUIGene) ((Gene) source.getNode().getConnection(i)).getGUIObject()).setState(GUIGeneState.EXTENDED_HOVER);
}
}
};
/**
* Set the node and its immediate connections to {@code GUIGeneState.NEUTRAL} state.
*/
private static EventHandler<MouseEvent> mouseExitedHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
// acquire the source, we can safely cast it to GUINode
GUINode source = (GUINode) event.getSource();
source.setState(GUIGeneState.NEUTRAL);
for (int i = 0; i < GUI.resources.arity(); i++) {
((GUIGene) ((Gene) source.getNode().getConnection(i)).getGUIObject()).setState(GUIGeneState.NEUTRAL);
}
}
};
/**
* Adds all handlers to the specified node.
*
* @param node the {@code GUINode} to which the handlers will be added.
*/
public static void addHandlers(GUINode node) {
node.addEventHandler(MouseEvent.MOUSE_ENTERED, mouseEnteredHandler);
node.addEventHandler(MouseEvent.MOUSE_EXITED, mouseExitedHandler);
}
}
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