com.badlogic.gdx.tests.ScrollPaneWithDynamicScrolling.java Source code

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Here is the source code for com.badlogic.gdx.tests.ScrollPaneWithDynamicScrolling.java

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/*******************************************************************************
 * Copyright 2019 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.tests;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.InputListener;
import com.badlogic.gdx.scenes.scene2d.Stage;
import com.badlogic.gdx.scenes.scene2d.ui.Label;
import com.badlogic.gdx.scenes.scene2d.ui.ScrollPane;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.Slider;
import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton;
import com.badlogic.gdx.scenes.scene2d.ui.TextButton.TextButtonStyle;
import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener;
import com.badlogic.gdx.scenes.scene2d.utils.ClickListener;
import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener.ChangeEvent;
import com.badlogic.gdx.tests.utils.GdxTest;
import com.badlogic.gdx.utils.Align;

public class ScrollPaneWithDynamicScrolling extends GdxTest {
    private Stage stage;
    private Table container;
    Label dynamicLabel;
    ScrollPane scrollPane;
    int count;

    public void create() {
        stage = new Stage();
        Skin skin = new Skin(Gdx.files.internal("data/uiskin.json"));
        Gdx.input.setInputProcessor(stage);

        dynamicLabel = new Label("Chat box begin here", skin);

        float chatWidth = 200;
        float controlHeight = 300;

        scrollPane = new ScrollPane(dynamicLabel, skin);

        Table main = new Table();

        main.setFillParent(true);

        TextButton btAdd = new TextButton("Add text and scroll down", skin);

        main.add(btAdd).row();
        main.add(scrollPane).size(200, 100);

        stage.addActor(main);

        stage.setDebugAll(true);

        btAdd.addListener(new ChangeListener() {
            @Override
            public void changed(ChangeEvent event, Actor actor) {
                dynamicLabel.setText(dynamicLabel.getText() + "\nline " + count++);
                scrollPane.scrollTo(0, 0, 0, 0);
            }
        });

    }

    public void render() {
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);
        stage.act(Gdx.graphics.getDeltaTime());
        stage.draw();
    }

    public void resize(int width, int height) {
        stage.getViewport().update(width, height, true);
    }

    public void dispose() {
        stage.dispose();
    }

    public boolean needsGL20() {
        return false;
    }
}