es.eucm.ead.editor.view.widgets.SliderPagesWidget.java Source code

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Here is the source code for es.eucm.ead.editor.view.widgets.SliderPagesWidget.java

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/**
 * eAdventure is a research project of the
 *    e-UCM research group.
 *
 *    Copyright 2005-2014 e-UCM research group.
 *
 *    You can access a list of all the contributors to eAdventure at:
 *          http://e-adventure.e-ucm.es/contributors
 *
 *    e-UCM is a research group of the Department of Software Engineering
 *          and Artificial Intelligence at the Complutense University of Madrid
 *          (School of Computer Science).
 *
 *          CL Profesor Jose Garcia Santesmases 9,
 *          28040 Madrid (Madrid), Spain.
 *
 *          For more info please visit:  <http://e-adventure.e-ucm.es> or
 *          <http://www.e-ucm.es>
 *
 * ****************************************************************************
 *
 *  This file is part of eAdventure
 *
 *      eAdventure is free software: you can redistribute it and/or modify
 *      it under the terms of the GNU Lesser General Public License as published by
 *      the Free Software Foundation, either version 3 of the License, or
 *      (at your option) any later version.
 *
 *      eAdventure is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *      GNU Lesser General Public License for more details.
 *
 *      You should have received a copy of the GNU Lesser General Public License
 *      along with eAdventure.  If not, see <http://www.gnu.org/licenses/>.
 */
package es.eucm.ead.editor.view.widgets;

import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.ui.ScrollPane;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.scenes.scene2d.utils.ClickListener;
import com.badlogic.gdx.utils.Array;

import es.eucm.ead.editor.view.SkinConstants;
import es.eucm.ead.editor.view.widgets.layouts.LinearLayout;

public class SliderPagesWidget extends Table {

    private ScrollPane scroll;

    private boolean wasPanDragFling;

    private int numPages;

    private Array<Actor> iconPages;

    public SliderPagesWidget(String background, Skin skin, Actor... actors) {
        super(skin);
        setFillParent(true);
        setBackground(skin.getDrawable(background));
        wasPanDragFling = false;
        numPages = actors.length;

        LinearLayout linearCircles = new LinearLayout(true);
        LinearLayout linearPages = new LinearLayout(true);

        scroll = new ScrollPane(linearPages) {

            @Override
            public void act(float delta) {
                super.act(delta);
                if (isPanning() || isDragging() || isFlinging()) {
                    SliderPagesWidget.this.actualizePagesIcon();
                }
                if (wasPanDragFling && !isPanning() && !isDragging() && !isFlinging()) {
                    scrollToPage();
                } else if (!wasPanDragFling && isPanning() || isDragging() || isFlinging()) {
                    wasPanDragFling = true;
                }
            }
        };
        scroll.setOverscroll(false, false);

        iconPages = linearCircles.getChildren();

        ClickListener listener = new ClickListener() {
            @Override
            public void clicked(InputEvent event, float x, float y) {
                Actor actor = event.getListenerActor();
                int index = iconPages.indexOf(actor, true);
                scrollToPage(index);
            }
        };

        for (Actor page : actors) {
            linearPages.add(page);

            IconButton pageCircle = new IconButton(SkinConstants.IC_CIRCLE, skin, SkinConstants.STYLE_SLIDER_PAGES);
            pageCircle.addListener(listener);
            linearCircles.add(pageCircle);
        }

        add(scroll).expand().fill();
        row();
        add(linearCircles);

        scrollToPage(0);
    }

    public void scrollToPage() {
        float diff = scroll.getScrollX() % getWidth();
        int index = (int) Math.floor(scroll.getScrollX() / getWidth()) + (diff > getWidth() / 2 ? 1 : 0);
        scrollToPage(index);

    }

    private void actualizePagesIcon() {
        float diff = scroll.getScrollX() % getWidth();
        int index = (int) Math.floor(scroll.getScrollX() / getWidth()) + (diff > getWidth() / 2 ? 1 : 0);
        for (Actor page : iconPages) {
            ((IconButton) page).setDisabled(false);
        }
        ((IconButton) iconPages.get(index)).setDisabled(true);
    }

    public void scrollToPage(int index) {
        if (index < 0) {
            index = 0;
        } else if (index >= numPages) {
            index = numPages - 1;
        }
        wasPanDragFling = false;
        scroll.scrollTo(index * getWidth(), scroll.getScrollY(), scroll.getWidth(), scroll.getHeight());
        actualizePagesIcon();
    }
}