org.eclipse.emf.ecp.view.group.vaadin.GroupLayoutRendererVaadin.java Source code

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Here is the source code for org.eclipse.emf.ecp.view.group.vaadin.GroupLayoutRendererVaadin.java

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/*******************************************************************************
 * Copyright (c) 2014 Dennis Melzer and others.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * Dennis - initial API and implementation
 ******************************************************************************/
package org.eclipse.emf.ecp.view.group.vaadin;

import org.apache.commons.lang3.StringUtils;
import org.eclipse.emf.ecp.view.core.vaadin.AbstractContainerRendererVaadin;
import org.eclipse.emf.ecp.view.spi.group.model.GroupType;
import org.eclipse.emf.ecp.view.spi.group.model.VGroup;

import com.vaadin.server.Sizeable.Unit;
import com.vaadin.ui.AbstractOrderedLayout;
import com.vaadin.ui.Button;
import com.vaadin.ui.Button.ClickEvent;
import com.vaadin.ui.Component;
import com.vaadin.ui.NativeButton;
import com.vaadin.ui.VerticalLayout;

/**
 * The Vaadin Renderer for {@link VGroup}.
 *
 * @author Dennis Melzer
 *
 */
public class GroupLayoutRendererVaadin extends AbstractContainerRendererVaadin<VGroup> {

    /**
     * Group Style.
     */
    protected static final String GROUP_STYLE_NAME = "group"; //$NON-NLS-1$
    private static final String COLLAPSIBLE_PANEL_COLLAPSED = "collapsible-panel-collapsed"; //$NON-NLS-1$
    private static final String COLLAPSIBLE_PANEL_EXPAND = "collapsible-panel-expand"; //$NON-NLS-1$

    @Override
    protected boolean isMargin() {
        return GroupType.NORMAL.equals(getVElement().getGroupType());
    }

    @Override
    protected boolean isSpacing() {
        return !GroupType.COLLAPSIBLE.equals(getVElement().getGroupType());
    }

    @Override
    protected AbstractOrderedLayout getAbstractOrderedLayout() {
        final VerticalLayout formLayout = new VerticalLayout();
        if (GroupType.NORMAL.equals(getVElement().getGroupType())) {
            formLayout.addStyleName(GROUP_STYLE_NAME);
        }
        return formLayout;
    }

    @Override
    protected boolean shouldShowCaption() {
        return true;
    }

    @Override
    protected Component getRenderComponent(final AbstractOrderedLayout orderedLayout) {
        if (GroupType.COLLAPSIBLE.equals(getVElement().getGroupType())) {
            final VerticalLayout mainLayout = new VerticalLayout();
            final NativeButton collapseButton = new NativeButton(StringUtils.EMPTY, new Button.ClickListener() {

                @Override
                public void buttonClick(ClickEvent event) {
                    final boolean switchVisible = !orderedLayout.isVisible();
                    setCollapseStyle(event.getButton(), switchVisible);
                    orderedLayout.setVisible(switchVisible);
                }

            });
            collapseButton.setWidth(100, Unit.PERCENTAGE);
            mainLayout.addComponent(collapseButton);
            mainLayout.addComponent(orderedLayout);
            orderedLayout.setMargin(true);
            orderedLayout.setSpacing(true);
            orderedLayout.setVisible(getVElement().isCollapsed());
            setCollapseStyle(collapseButton, getVElement().isCollapsed());
            mainLayout.addStyleName(GROUP_STYLE_NAME);
            return mainLayout;
        }
        return super.getRenderComponent(orderedLayout);
    }

    private void setCollapseStyle(Button collapseButton, boolean collapse) {
        final String styleExpand = COLLAPSIBLE_PANEL_EXPAND;
        final String styleCollapsed = COLLAPSIBLE_PANEL_COLLAPSED;
        if (collapse) {
            collapseButton.addStyleName(styleExpand);
            collapseButton.removeStyleName(styleCollapsed);
        } else {
            collapseButton.addStyleName(styleCollapsed);
            collapseButton.removeStyleName(styleExpand);
        }
    }

    @Override
    protected void applyCaption() {
        if (GroupType.COLLAPSIBLE.equals(getVElement().getGroupType())) {
            final Component controlComponent = ((AbstractOrderedLayout) getControlComponent()).getComponent(0);
            setControlComponent(controlComponent);
            super.applyCaption();
            return;

        }
        super.applyCaption();
    }
}