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package jcgp.gui.handlers;
import javafx.event.EventHandler;
import javafx.scene.input.MouseEvent;
import jcgp.gui.population.GUIGene.GUIGeneState;
import jcgp.gui.population.GUIInput;
/**
* Holds the handlers that define the behaviour of {@code GUIInput}.
* <br><br>
* The handlers are instantiated here statically and added to {@code GUIInput}
* instances using {@code InputHandlers.addHandlers(...)}. This guarantees that
* all inputs behave the same way without instantiating a new set of handlers for
* each input instance.
*
* @author Eduardo Pedroni
*
*/
public final class InputHandlers {
/**
* Private constructor to prevent instantiation.
*/
private InputHandlers() {}
/**
* Inputs don't do much; set state to hover when mouse enters.
*/
private static EventHandler<MouseEvent> mouseEnteredHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
((GUIInput) event.getSource()).setState(GUIGeneState.HOVER);
}
};
/**
* Inputs don't do much; set state to neutral when mouse exits.
*/
private static EventHandler<MouseEvent> mouseExitedHandler = new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent event) {
((GUIInput) event.getSource()).setState(GUIGeneState.NEUTRAL);
}
};
/**
* Adds all handlers to the specified input.
*
* @param input the {@code GUIInput} to which the handlers will be added.
*/
public static void addHandlers(GUIInput input) {
input.addEventHandler(MouseEvent.MOUSE_ENTERED, mouseEnteredHandler);
input.addEventHandler(MouseEvent.MOUSE_EXITED, mouseExitedHandler);
}
}
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