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Author: Gornova (posted 2018-03-02 22:15:33, viewed 618 times)

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package it.randomtower.nyr.desktop.test;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input.Keys;
import com.badlogic.gdx.InputMultiplexer;
import com.badlogic.gdx.InputProcessor;
import com.badlogic.gdx.backends.lwjgl.LwjglApplication;
import com.badlogic.gdx.backends.lwjgl.LwjglApplicationConfiguration;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Dialog;
import com.badlogic.gdx.scenes.scene2d.ui.Image;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;

public class MapPanZoomExample extends ApplicationAdapter {

   private OrthographicCamera cam;
   private Image map;
   public SpriteBatch batch;
   private Stage stage;
   private Skin skin;

   @Override
   public void create() {
      batch = new SpriteBatch();
      // create ui
      stage = new Stage();
      skin = new Skin(Gdx.files.internal("defaultSkin/uiskin.json"));
      final Dialog dialog = new Dialog("Welcome", skin, "dialog") {
         public void result(Object obj) {
            System.out.println("Closed dialog!");
         }
      };
      dialog.setPosition(Gdx.graphics.getWidth() / 2, Gdx.graphics.getHeight() / 2, 0);
      dialog.text("Hello World ! Try to move with mouse and zoom with mouse wheel");
      dialog.button("Close", true); // sends "true" as the result
      dialog.pack();
      dialog.setVisible(true);
      stage.addActor(dialog);
      // init camera
      cam = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
      cam.setToOrtho(false, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
      // init map image
      map = new Image(new Texture("exampleMap.jpg"));
      // init input processor
      InputMultiplexer multi = new InputMultiplexer();
      multi.addProcessor(stage);
      multi.addProcessor(new InputProcessor() {

         @Override
         public boolean touchUp(int screenX, int screenY, int pointer, int button) {
            return false;
         }

         @Override
         public boolean touchDragged(int screenX, int screenY, int pointer) {
            return false;
         }

         @Override
         public boolean touchDown(int screenX, int screenY, int pointer, int button) {
            System.out.println("clicked: " + screenX + "," + screenY);
            return false;
         }

         @Override
         public boolean scrolled(int amount) {
            // arbitrary max zoomIn and max zoomOut values here
            if (cam.zoom - amount >= -0.25f && cam.zoom - amount <= 2) {
               cam.zoom -= (float) amount / 10f;
            }
            return true;
         }

         @Override
         public boolean mouseMoved(int screenX, int screenY) {
            return false;
         }

         @Override
         public boolean keyUp(int keycode) {
            return false;
         }

         @Override
         public boolean keyTyped(char character) {
            return false;
         }

         @Override
         public boolean keyDown(int keycode) {
            System.out.println("Key down: " + keycode);
            int step = 20;
            int dx = 0;
            int dy = 0;
            if (keycode == Keys.LEFT) {
               dx = -step;
            }
            if (keycode == Keys.RIGHT) {
               dx = step;
            }
            if (keycode == Keys.UP) {
               dy = step;
            }
            if (keycode == Keys.DOWN) {
               dy = -step;
            }
            cam.translate(dx, dy);
            return true;
         }
      });

      Gdx.input.setInputProcessor(multi);
   }

   @Override
   public void render() {
      Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
      cam.update();
      batch.setProjectionMatrix(cam.combined);
      batch.begin();
      map.draw(batch, 1);
      batch.end();
      stage.act(Gdx.graphics.getDeltaTime());
      stage.draw();
   }

   public static void main(String[] arg) {
      LwjglApplicationConfiguration config = new LwjglApplicationConfiguration();
      config.width = 1024;
      config.height = 768;
      new LwjglApplication(new MapPanZoomExample(), config);
   }

}





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