com.gdx.extension.ui.slide.SlideShow.java Source code

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Here is the source code for com.gdx.extension.ui.slide.SlideShow.java

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/** Copyright 2013
 * 
 * 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.gdx.extension.ui.slide;

import com.badlogic.gdx.scenes.scene2d.Actor;
import com.badlogic.gdx.scenes.scene2d.InputEvent;
import com.badlogic.gdx.scenes.scene2d.ui.Cell;
import com.badlogic.gdx.scenes.scene2d.ui.HorizontalGroup;
import com.badlogic.gdx.scenes.scene2d.ui.ImageButton;
import com.badlogic.gdx.scenes.scene2d.ui.ImageButton.ImageButtonStyle;
import com.badlogic.gdx.scenes.scene2d.ui.ScrollPane;
import com.badlogic.gdx.scenes.scene2d.ui.ScrollPane.ScrollPaneStyle;
import com.badlogic.gdx.scenes.scene2d.ui.Skin;
import com.badlogic.gdx.scenes.scene2d.ui.Table;
import com.badlogic.gdx.scenes.scene2d.ui.VerticalGroup;
import com.badlogic.gdx.scenes.scene2d.ui.WidgetGroup;
import com.badlogic.gdx.scenes.scene2d.utils.ClickListener;
import com.badlogic.gdx.scenes.scene2d.utils.Drawable;

public class SlideShow extends Table {

    private SlideShowStyle style;

    private ScrollPane contentScroll;
    private WidgetGroup content;

    private ImageButton previousScrollButton;
    private ImageButton nextScrollButton;

    private Cell<ImageButton> previousScrollButtonCell;
    private Cell<ImageButton> nextScrollButtonCell;

    private boolean isVertical;
    private boolean showButtons = true;

    public SlideShow(Skin skin) {
        this(false, skin);
    }

    public SlideShow(boolean isVertical, Skin skin) {
        this(isVertical, skin, (isVertical) ? "default-vertical" : "default-horizontal");
    }

    public SlideShow(boolean isVertical, Skin skin, String styleName) {
        super(skin);

        setStyle(skin.get(styleName, SlideShowStyle.class));

        this.isVertical = isVertical;

        content = (isVertical) ? new VerticalGroup() : new HorizontalGroup();

        ScrollPaneStyle _scrollStyle = new ScrollPaneStyle();
        contentScroll = new ScrollPane(content, _scrollStyle);
        contentScroll.setScrollingDisabled(isVertical, !isVertical);
        contentScroll.setOverscroll(false, false);

        setBackground(style.background);

        previousScrollButton = new ImageButton(getStyle().previousScroll);
        previousScrollButtonCell = add(previousScrollButton);
        if (isVertical)
            previousScrollButtonCell.row();
        Cell<ScrollPane> _contentCell = add(contentScroll);
        if (isVertical)
            _contentCell.row();
        nextScrollButton = new ImageButton(getStyle().nextScroll);
        nextScrollButtonCell = add(nextScrollButton);

        previousScrollButton.addListener(new ClickListener() {

            @Override
            public void clicked(InputEvent event, float x, float y) {
                if (SlideShow.this.isVertical)
                    contentScroll.setScrollPercentY(contentScroll.getScrollPercentY() - 0.1f);
                else
                    contentScroll.setScrollPercentX(contentScroll.getScrollPercentX() - 0.1f);
            }

        });
        nextScrollButton.addListener(new ClickListener() {

            @Override
            public void clicked(InputEvent event, float x, float y) {
                if (SlideShow.this.isVertical)
                    contentScroll.setScrollPercentY(contentScroll.getScrollPercentY() + 0.1f);
                else
                    contentScroll.setScrollPercentX(contentScroll.getScrollPercentX() + 0.1f);
            }

        });
    }

    public void addItem(Actor actor) {
        content.addActor(actor);
    }

    public void setStyle(SlideShowStyle style) {
        this.style = style;
    }

    @Override
    public void validate() {
        super.validate();

        if (isVertical)
            contentScroll.setWidth(content.getWidth());
        else
            contentScroll.setHeight(content.getHeight());

        if (showButtons) {
            float _scrollPercent;
            if (isVertical)
                _scrollPercent = contentScroll.getScrollPercentY();
            else
                _scrollPercent = contentScroll.getScrollPercentX();

            if (_scrollPercent > 0f)
                previousScrollButtonCell.setActor(previousScrollButton);
            else
                previousScrollButtonCell.setActor(null);
            if (_scrollPercent < 1f)
                nextScrollButtonCell.setActor(nextScrollButton);
            else
                nextScrollButtonCell.setActor(null);
        }
    }

    public void setShowButtons(boolean show) {
        this.showButtons = show;

        if (!show) {
            previousScrollButtonCell.setActor(null);
            nextScrollButtonCell.setActor(null);
        }
    }

    public boolean getShowButtons() {
        return showButtons;
    }

    public boolean isVertical() {
        return isVertical;
    }

    public SlideShowStyle getStyle() {
        return style;
    }

    public static class SlideShowStyle {

        /** Optional */
        public Drawable background;

        public ImageButtonStyle previousScroll, nextScroll;
    }

}