me.uni.emuseo.view.common.ExpandingPanel.java Source code

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Here is the source code for me.uni.emuseo.view.common.ExpandingPanel.java

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/*******************************************************************************
 * Copyright (c) 2016 Darian Jakubik.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *     Darian Jakubik - initial API and implementation
 ******************************************************************************/
package me.uni.emuseo.view.common;

import com.vaadin.server.FontAwesome;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Component;
import com.vaadin.ui.VerticalLayout;

public class ExpandingPanel extends VerticalLayout {
    /**
     * 
     */
    private static final long serialVersionUID = -7932244176994357635L;
    protected Component expandingContent;
    protected Button expandingButton;
    protected boolean expanded;

    public ExpandingPanel() {
        expandingButton = new Button();
        expandingButton.addClickListener(new Button.ClickListener() {

            /**
             * 
             */
            private static final long serialVersionUID = -441812999850345526L;

            @Override
            public void buttonClick(ClickEvent event) {
                onToggle();
            }

        });
        expandingButton.setWidth(100, Unit.PERCENTAGE);
        expandingButton.setStyleName("expanding-panel-button");
        setWidth(100, Unit.PERCENTAGE);
        addComponent(expandingButton);
        setExpandRatio(expandingButton, 0);
        this.setSizeFull();
        setStyleName("expanding-panel");

        expanded = false;
        expandingButton.setIcon(FontAwesome.CHEVRON_DOWN);
    }

    public void setContent(Component expandingContent) {
        if (expanded) {
            onToggle();
            this.expandingContent = expandingContent;
            onToggle();
        } else {
            this.expandingContent = expandingContent;
        }
    }

    public Component getContent() {
        return expandingContent;
    }

    protected void onToggle() {
        boolean toExpand = !this.expanded;
        if (toExpand) {
            this.addComponent(expandingContent);
            this.setExpandRatio(expandingContent, 1);
            addStyleName("expanded");
            expandingButton.setIcon(FontAwesome.CHEVRON_RIGHT);
        } else {
            this.removeComponent(expandingContent);
            removeStyleName("expanded");
            expandingButton.setIcon(FontAwesome.CHEVRON_DOWN);
        }
        this.expanded = !this.expanded;
    }

    public void setExpanded(boolean expanded) {
        if (this.expanded ^ expanded) {
            onToggle();
        }
    }

    public String getCaption() {
        return expandingButton.getCaption();
    }

    public void setCaption(String caption) {
        expandingButton.setCaption(caption);
    }

}