Java tutorial
/* * Copyright 2002-2005 the 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 info.jtrac.wicket; import info.jtrac.domain.Field; import info.jtrac.domain.Item; import info.jtrac.domain.Space; import info.jtrac.domain.User; import info.jtrac.wicket.behavior.ErrorHighlighter; import info.jtrac.wicket.yui.YuiCalendar; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.wicket.markup.html.WebMarkupContainer; import org.apache.wicket.markup.html.basic.Label; import org.apache.wicket.markup.html.form.DropDownChoice; import org.apache.wicket.markup.html.form.IChoiceRenderer; import org.apache.wicket.markup.html.form.TextField; import org.apache.wicket.markup.html.list.ListItem; import org.apache.wicket.markup.html.list.ListView; import org.apache.wicket.markup.html.panel.Fragment; import org.apache.wicket.model.BoundCompoundPropertyModel; import org.apache.wicket.model.Model; import org.apache.wicket.model.PropertyModel; import org.apache.wicket.util.convert.converters.DoubleConverter; /** * This class is responsible for the panel of custom fields that * can be reused in the item-create/item-view forms. */ public class CustomFieldsFormPanel extends BasePanel { /** * Constructor * * @param id * @param model * @param space */ public CustomFieldsFormPanel(String id, BoundCompoundPropertyModel model, Space space) { super(id); List<Field> fields = space.getMetadata().getFieldList(); addComponents(model, fields, true); } /** * Constructor * * @param id * @param model * @param item * @param user */ public CustomFieldsFormPanel(String id, BoundCompoundPropertyModel model, Item item, User user) { super(id); List<Field> fields = item.getEditableFieldList(user); addComponents(model, fields, false); } /** * This method allows to add components (custom fields). * * @param model * @param fields * @param isEditMode */ private void addComponents(final BoundCompoundPropertyModel model, List<Field> fields, final boolean isEditMode) { ListView listView = new ListView("fields", fields) { @Override protected void populateItem(ListItem listItem) { final Field field = (Field) listItem.getModelObject(); boolean isRequired = isEditMode ? false : !field.isOptional(); listItem.add(new Label("label", field.getLabel())); listItem.add(new Label("star", isRequired ? "*" : " ").setEscapeModelStrings(false)); if (field.isDropDownType()) { Fragment f = new Fragment("field", "dropDown", CustomFieldsFormPanel.this); final Map<String, String> options = field.getOptions(); List<String> keys; // bound value if (options != null) { keys = new ArrayList<String>(options.keySet()); } else { keys = new ArrayList<String>(); } DropDownChoice choice = new DropDownChoice("field", keys, new IChoiceRenderer() { @Override public Object getDisplayValue(Object o) { return options.get(o); }; @Override public String getIdValue(Object o, int i) { return o.toString(); }; }); choice.setNullValid(true); choice.setLabel(new Model(field.getLabel())); choice.setRequired(isRequired); WebMarkupContainer border = new WebMarkupContainer("border"); f.add(border); border.add(new ErrorHighlighter(choice)); border.add(model.bind(choice, field.getName().getText())); listItem.add(f); } else if (field.isDatePickerType()) { /* * ====================================== * Date picker * ====================================== */ YuiCalendar calendar = new YuiCalendar("field", new PropertyModel(model, field.getName().getText()), isRequired); listItem.add(calendar); calendar.setLabel(new Model(field.getLabel())); } else { /* * ====================================== * Text field * ====================================== */ Fragment f = new Fragment("field", "textField", CustomFieldsFormPanel.this); TextField textField = new TextField("field"); /* * Check if the field is used to display/edit * Double values. */ if (field.isDecimalNumberType()) { /* * The following code overwrites the default * DoubleConverter used by Wicket (getConverter(Class)). * The original implementation rounds after three * digits to the right of the decimal point. * * As there are requirements to show six digits to * the right of the decimal point the NumberFormat * is enhanced in the code below by the DecimalFormat * class. That has been used because the DecimalFormat * class supports a formatting pattern which allows * to use the digits to the right only if really * needed (currently limited to six digits to the * right of the decimal point). */ textField = new TextField("field", Double.class) { @Override public org.apache.wicket.util.convert.IConverter getConverter( @SuppressWarnings("rawtypes") Class type) { DoubleConverter converter = (DoubleConverter) DoubleConverter.INSTANCE; java.text.NumberFormat numberFormat = converter.getNumberFormat(getLocale()); java.text.DecimalFormat decimalFormat = (java.text.DecimalFormat) numberFormat; decimalFormat.applyPattern("###,##0.######"); converter.setNumberFormat(getLocale(), decimalFormat); return converter; }; }; } textField.add(new ErrorHighlighter()); textField.setRequired(isRequired); textField.setLabel(new Model(field.getLabel())); f.add(model.bind(textField, field.getName().getText())); listItem.add(f); } } }; listView.setReuseItems(true); add(listView); } // end method addComponents(...) }