java 如何在 libgdx scene2d 上拖放演员？
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how to drag and drop actors on libgdx scene2d?
提问by Juan Mitchell
I'm developing a game using libGDX and I would like to know how I can drag and drop an Actor. I've made my stage and drawn the actor, but I don't know how to trigger that event.
我正在使用 libGDX 开发游戏，我想知道如何拖放 Actor。我已经搭建了舞台并绘制了演员，但我不知道如何触发该事件。
Please try to help me using my own architecture.
请尝试使用我自己的架构来帮助我。
public class MyGame implements ApplicationListener
{
Stage stage;
Texture texture;
Image actor;
@Override
public void create()
{
texture = new Texture(Gdx.files.internal("actor.png"));
Gdx.input.setInputProcessor(stage);
stage = new Stage(512f,512f,true);
actor = new Image(texture);
stage.addActor(actor);
}
@Override
public void render()
{
Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT);
stage.draw();
}
}
采纳答案by BennX
Take a look at the Example in the libgdx examples. Here is the drag and drop test from the libgdx test classes: DragAndDropTest
查看 libgdx 示例中的示例。这是来自 libgdx 测试类的拖放测试：DragAndDropTest
If you just want to drag/slide your Actor around you need to add a GestureListener to it and pass your Stage to the Inputprocessor like this:Gdx.input.setInputProcessor(stage);.
Here is the GestureDetectorTestfrom libgdx.
For drag events its the Flinglistener.
如果你只是想拖/在你身边需要一个GestureListener添加到它，并通过你的舞台在Inputprocessor这样的滑动演员：Gdx.input.setInputProcessor(stage);。这里是GestureDetectorTest从libgdx。对于拖动事件，它是 Flinglistener。
回答by pablo2303
If you don't want to use DragAndDropclass, you can use this:
如果你不想使用DragAndDrop类，你可以使用这个：
actor.addListener(new DragListener() {
public void drag(InputEvent event, float x, float y, int pointer) {
actor.moveBy(x - actor.getWidth() / 2, y - actor.getHeight() / 2);
}
});
Edit: method draginstead touchDragged
编辑：方法drag代替touchDragged
回答by GothicFan
In your main gamescreen class add a multiplexer so you can access events from different classes:
在您的主游戏屏幕类中添加一个多路复用器，以便您可以访问来自不同类的事件：
private InputMultiplexer inputMultiplexer = new InputMultiplexer(this);
After the gamescreen constructor add as an example:
在 gamescreen 构造函数后添加作为示例：
inputMultiplexer = new InputMultiplexer(this);
inputMultiplexer.addProcessor(1, renderer3d.controller3d);
inputMultiplexer.addProcessor(2, renderer.controller2d);
inputMultiplexer.addProcessor(3, renderer3d.stage);
Gdx.input.setInputProcessor(inputMultiplexer);
In your class that is using the actors use a DragListener as and example:
在您使用演员的课程中，使用 DragListener 作为示例：
Actor.addListener((new DragListener() {
public void touchDragged (InputEvent event, float x, float y, int pointer) {
// example code below for origin and position
Actor.setOrigin(Gdx.input.getX(), Gdx.input.getY());
Actor.setPosition(x, y);
System.out.println("touchdragged" + x + ", " + y);
}
}));
