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106 lines
2.2 KiB
106 lines
2.2 KiB
package mightypork.gamecore.gui.screens;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.TreeSet;
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import mightypork.gamecore.core.App;
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import mightypork.gamecore.graphics.Renderable;
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import mightypork.gamecore.gui.events.LayoutChangeEvent;
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import mightypork.gamecore.gui.events.ScreenRequestListener;
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import mightypork.gamecore.gui.events.ViewportChangeEvent;
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import mightypork.gamecore.gui.events.ViewportChangeListener;
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import mightypork.utils.eventbus.clients.BusNode;
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import mightypork.utils.logging.Log;
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/**
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* Game screens holder; Takes care of rendering and screen requests.
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*
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* @author Ondřej Hruška (MightyPork)
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*/
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public class ScreenRegistry extends BusNode implements ScreenRequestListener, ViewportChangeListener, Renderable {
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private final Map<String, Screen> screens = new HashMap<>();
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private final Collection<Overlay> overlays = new TreeSet<>();
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private volatile Screen active = null;
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/**
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* Add a screen
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*
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* @param name screen key for calling
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* @param screen added screen
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*/
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public void addScreen(String name, Screen screen)
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{
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screens.put(name, screen);
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addChildClient(screen);
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}
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/**
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* Add an overlay
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*
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* @param overlay added overlay
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*/
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public void addOverlay(Overlay overlay)
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{
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overlays.add(overlay);
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addChildClient(overlay);
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}
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@Override
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public void showScreen(String key)
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{
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Log.f3("Request to show screen \"" + key + "\"");
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// find screen to show
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final Screen toShow = screens.get(key);
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if (toShow == null) {
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throw new RuntimeException("Screen " + key + " not defined.");
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}
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// deactivate last screen
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if (active != null) {
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active.setActive(false);
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}
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// activate new screen
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toShow.setActive(true);
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active = toShow;
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fireLayoutUpdateEvent();
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}
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@Override
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public void render()
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{
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if (active != null) {
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active.render();
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for (final Overlay overlay : overlays) {
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if (overlay.isVisible()) overlay.render();
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}
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}
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}
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@Override
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public void onViewportChanged(ViewportChangeEvent event)
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{
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if (active != null) fireLayoutUpdateEvent();
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}
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private void fireLayoutUpdateEvent()
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{
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App.bus().sendDirectToChildren(this, new LayoutChangeEvent());
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}
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}
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