customtoolbar.java

JMesa是一个动态的HTML表

/*
 * Copyright 2004 original author or authors.
 *
 * 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 org.jmesaweb.controller;

import java.util.List;
import org.jmesa.core.CoreContext;
import org.jmesa.view.ViewUtils;
import org.jmesa.view.component.Row;
import org.jmesa.view.html.HtmlUtils;
import org.jmesa.view.html.toolbar.AbstractItemRenderer;
import org.jmesa.view.html.toolbar.MaxRowsItem;
import org.jmesa.view.html.toolbar.AbstractToolbar;
import org.jmesa.view.html.toolbar.ImageItem;
import org.jmesa.view.html.toolbar.ImageItemImpl;
import org.jmesa.view.html.toolbar.ToolbarItem;
import org.jmesa.view.html.toolbar.ToolbarItemRenderer;
import org.jmesa.view.html.toolbar.ToolbarItemType;
import org.jmesa.web.WebContext;

/**
 * @author Jeff Johnston
 */
public class CustomToolbar extends AbstractToolbar {
    @Override
    public String render() {
        addToolbarItem(ToolbarItemType.FIRST_PAGE_ITEM);
        addToolbarItem(ToolbarItemType.PREV_PAGE_ITEM);
        addToolbarItem(ToolbarItemType.NEXT_PAGE_ITEM);
        addToolbarItem(ToolbarItemType.LAST_PAGE_ITEM);

        addToolbarItem(ToolbarItemType.SEPARATOR);

        MaxRowsItem maxRowsItem = (MaxRowsItem) addToolbarItem(ToolbarItemType.MAX_ROWS_ITEM);
        if (getMaxRowsIncrements() != null) {
            maxRowsItem.setIncrements(getMaxRowsIncrements());
        }

        boolean exportable = ViewUtils.isExportable(getExportTypes());

        if (exportable) {
            addToolbarItem(ToolbarItemType.SEPARATOR);
        }

        if (exportable) {
            addExportToolbarItems(getExportTypes());
        }

        Row row = getTable().getRow();
        List columns = row.getColumns();

        boolean filterable = ViewUtils.isFilterable(columns);

        if (filterable) {
            addToolbarItem(ToolbarItemType.SEPARATOR);
        }

        if (filterable) {
            addToolbarItem(ToolbarItemType.FILTER_ITEM);
            addToolbarItem(ToolbarItemType.CLEAR_ITEM);
        }
        
        addToolbarItem(ToolbarItemType.SEPARATOR);
        
        addToolbarItem(createCustomItem());

        return super.render();
    }
    
    private ImageItem createCustomItem() {
        ImageItemImpl item = new ImageItemImpl();
        
        item.setCode("custom-item");
        item.setTooltip("Hello World");
        
        item.setImage(getImage("custom.gif", getWebContext(), getCoreContext()));
        item.setAlt("custom");

        ToolbarItemRenderer renderer = new CustomItemRenderer(item, getCoreContext());
        renderer.setOnInvokeAction("onInvokeAction");
        item.setToolbarItemRenderer(renderer);

        return item;
    }
    
    private String getImage(String image, WebContext webContext, CoreContext coreContext) {
        String imagesPath = HtmlUtils.imagesPath(webContext, coreContext);
        return imagesPath + image;
    }
    
    private static class CustomItemRenderer extends AbstractItemRenderer {
        public CustomItemRenderer(ToolbarItem item, CoreContext coreContext) {
            setToolbarItem(item);
            setCoreContext(coreContext);
        }

        public String render() {
            ToolbarItem item = getToolbarItem();
            StringBuilder action = new StringBuilder("javascript:");
            action.append("alert('Hello World')");
            item.setAction(action.toString());
            return item.enabled();
        }
    }
}