ProfilerSystem.java

package net.mostlyoriginal.plugin.profiler;

import com.artemis.BaseSystem;
import com.artemis.annotations.Wire;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.Input;
import com.badlogic.gdx.graphics.Color;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.glutils.ShapeRenderer;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import net.mostlyoriginal.plugin.ProfilerPlugin;

/**
 * Example profiling system.
 *
 * @author piotr-j
 * @author Daan van Yperen
 * @see ProfilerPlugin
 */
@Wire
public class ProfilerSystem extends BaseSystem {

	public static final int DEFAULT_PROFILER_KEY = Input.Keys.P;

	OrthographicCamera camera;
	ShapeRenderer renderer;
	Stage stage;
	Skin skin;

	private int key = DEFAULT_PROFILER_KEY;

	SystemProfilerGUI gui;
	private boolean f3ButtonDown;

	@Override
	protected void initialize() {

		camera = new OrthographicCamera(Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
		camera.setToOrtho(false);
		camera.update();
		renderer = new ShapeRenderer();
		stage = new Stage();
		stage.getBatch().setProjectionMatrix(camera.combined);
		skin = new Skin(Gdx.files.classpath("net/mostlyoriginal/plugin/profiler/skin/uiskin.json"));

		// setup some static config like colors etc
		SystemProfilerGUI.GRAPH_H_LINE.set(Color.ORANGE);
		gui = new SystemProfilerGUI(skin, "default");
		gui.setResizeBorder(8);
		gui.show(stage);
		gui.setWidth(Gdx.graphics.getWidth());
	}

	@Override
	protected void processSystem() {
		if (!isEnabled() || !isConfigured()) {
			return;
		}

		checkActivationButton();

		if ( SystemProfiler.isRunning()) {
			processInput();
			render();
		}
	}

	private boolean isConfigured() {
		return gui.getParent() != null;
	}

	private void render() {
		stage.act(world.delta);
		stage.draw();
		renderer.setProjectionMatrix(camera.combined);
		renderer.begin(ShapeRenderer.ShapeType.Line);
		gui.updateAndRender(world.delta, renderer);
		renderer.end();
	}

	private void checkActivationButton() {
		if ( Gdx.input.isKeyPressed(key) ) {
			if ( !f3ButtonDown ) {
				if (!SystemProfiler.isRunning()) {
					gui.setHeight(Gdx.graphics.getHeight()/2);
					SystemProfiler.resume();
				} else if ( gui.getHeight() != Gdx.graphics.getHeight() ) {
					gui.setHeight(Gdx.graphics.getHeight());
				} else {
					SystemProfiler.pause();
				}
			}
			f3ButtonDown = true;
		} else f3ButtonDown = false;
	}

	private boolean leftMouseDown;
	/** Emulate stage input to maintain pre-existing input processor. */
	private void processInput() {
		if ( Gdx.input.isButtonPressed(Input.Buttons.LEFT)) {
			if ( !leftMouseDown) {
				leftMouseDown = true;
				stage.touchDown(Gdx.input.getX(), Gdx.input.getY(), 0, Input.Buttons.LEFT);
			} else {
				stage.touchDragged(Gdx.input.getX(), Gdx.input.getY(), 0);
			}
		} else if (leftMouseDown)  {
			leftMouseDown = false;
			stage.touchUp(Gdx.input.getX(), Gdx.input.getY(), 0, Input.Buttons.LEFT);
		}
	}

	@Override
	protected void dispose() {
		SystemProfiler.dispose();
	}

	public int getKey() {
		return key;
	}

	public void setKey(int key) {
		this.key = key;
	}
}