如何在平铺 map 中为平铺 map 添加点击侦听器,以便在用鼠标选择平铺 map 时将其突出显示?
最佳答案
libGDX不直接支持该功能,因为TiledMap内容仅用于渲染。
不过,您可以轻松创建一个Stage
,它将充当TiledMap的某种叠加输入层。只需为每个图块创建一个Actor
,该图的大小与该图块的位置相同。然后,您可以向这些参与者添加EventListener
,从而能够识别诸如点击这些参与者的事情。
这些参与者应保留对其“起源”的引用,即TiledMapTileLayer.Cell
。因此,在处理这些事件时,您可以随时从角色返回到单元。
下面显示了如何执行此操作:
该Actor负责捕获事件并根据以下内容保留有关其图块的信息:
public class TiledMapActor extends Actor {
private TiledMap tiledMap;
private TiledMapTileLayer tiledLayer;
private TiledMapTileLayer.Cell cell;
public TiledMapActor(TiledMap tiledMap, TiledMapTileLayer tiledLayer, TiledMapTileLayer.Cell cell) {
this.tiledMap = tiledMap;
this.tiledLayer = tiledLayer;
this.cell = cell;
}
}
这个小侦听器可以附加到其中一个参与者上,并且可以执行任何逻辑:
public class TiledMapClickListener extends ClickListener {
private TiledMapActor actor;
public TiledMapClickListener(TiledMapActor actor) {
this.actor = actor;
}
@Override
public void clicked(InputEvent event, float x, float y) {
System.out.println(actor.cell + " has been clicked.");
}
}
下面的类实际上是根据给定的映射创建actor并将其连接到侦听器:
public class TiledMapStage extends Stage {
private TiledMap tiledMap;
public TiledMapStage(TiledMap tiledMap) {
this.tiledMap = tiledMap;
for (MapLayer layer : tiledMap.getLayers()) {
TiledMapTileLayer tiledLayer = (TiledMapTileLayer)layer;
createActorsForLayer(tiledLayer);
}
}
private void createActorsForLayer(TiledMapTileLayer tiledLayer) {
for (int x = 0; x < tiledLayer.getWidth(); x++) {
for (int y = 0; y < tiledLayer.getHeight(); y++) {
TiledMapTileLayer.Cell cell = tiledLayer.getCell(x, y);
TiledMapActor actor = new TiledMapActor(tiledMap, tiledLayer, cell);
actor.setBounds(x * tiledLayer.getTileWidth(), y * tiledLayer.getTileHeight(), tiledLayer.getTileWidth(),
tiledLayer.getTileHeight());
addActor(actor);
EventListener eventListener = new TiledMapClickListener(actor);
actor.addListener(eventListener);
}
}
}
}
现在,
TiledMapStage
将为您完成所有工作。您需要做的只是以下几点:Stage stage = new TiledMapStage(tiledMap);
Gdx.input.setInputProcessor(stage);
在render(...)中,您需要调用
stage.act()
。请记住,在渲染TiledMap时,请在舞台上使用相同的Viewport
。否则,输入和渲染的 map 将无法对齐。