Java tutorial
package uk.co.intec.keyDatesApp.pages; /* <!-- Copyright 2015 Paul Withers 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 --> */ import java.util.Calendar; import java.util.Date; import org.apache.commons.lang.StringUtils; import com.vaadin.data.Property; import com.vaadin.data.fieldgroup.BeanFieldGroup; import com.vaadin.data.fieldgroup.DefaultFieldGroupFieldFactory; import com.vaadin.navigator.View; import com.vaadin.navigator.ViewChangeListener.ViewChangeEvent; import com.vaadin.server.FontAwesome; import com.vaadin.shared.ui.combobox.FilteringMode; import com.vaadin.ui.Button; import com.vaadin.ui.Button.ClickEvent; import com.vaadin.ui.ComboBox; import com.vaadin.ui.CssLayout; import com.vaadin.ui.DateField; import com.vaadin.ui.FormLayout; import com.vaadin.ui.HorizontalLayout; import com.vaadin.ui.Notification; import com.vaadin.ui.Notification.Type; import com.vaadin.ui.TextArea; import com.vaadin.ui.TextField; import com.vaadin.ui.themes.ValoTheme; import uk.co.intec.keyDatesApp.MainUI; import uk.co.intec.keyDatesApp.model.KeyDateBean; import uk.co.intec.keyDatesApp.model.KeyDateDatabaseUtils; import uk.co.intec.keyDatesApp.model.KeyDateDocumentWrapper; /** * @author Paul Withers<br/> * <br/> * Edit page for an individual Key Date. * */ public class KeyDateView extends CssLayout implements View { private static final long serialVersionUID = 1L; public static final String VIEW_NAME = "KeyDate"; public static final String VIEW_LABEL = "New Key Date"; private boolean loaded = false; private FormLayout editForm = new FormLayout(); private KeyDateDocumentWrapper currDoc; private KeyDateBean currDocBean = new KeyDateBean(); private BeanFieldGroup<KeyDateBean> beanFields = new BeanFieldGroup<KeyDateBean>(KeyDateBean.class); private ComboBox customerCombo; private ComboBox contactCombo; private Button editButton; private Button saveButton; /** * Constructor, sets CssLayout to take full area */ public KeyDateView() { setSizeFull(); } /** * Shows an error message on the screen * * @param msg * String error to display */ public void showError(String msg) { Notification.show(msg, Type.ERROR_MESSAGE); } /* * (non-Javadoc) * * @see * com.vaadin.navigator.View#enter(com.vaadin.navigator.ViewChangeListener. * ViewChangeEvent) */ @Override public void enter(ViewChangeEvent event) { try { final String[] params = event.getParameters().split("/"); if (StringUtils.isEmpty(params[0])) { setCurrDoc(new KeyDateDocumentWrapper("", true)); } else { final String docId = params[0]; setCurrDoc(new KeyDateDocumentWrapper(docId, false)); } getCurrDocBean().loadFromDocumentWrapper(getCurrDoc()); if (!isLoaded()) { loadContent(); setLoaded(true); } } catch (final Exception e) { e.printStackTrace(); } } /** * Loads the main content for the page. Only called on first entry to the * page, because calling method sets <i>isLoaded</i> to true after * successfully completing. */ public void loadContent() { getEditForm().setSizeUndefined(); getEditForm().setWidth("100%"); getBeanFields().setBuffered(false); getBeanFields().setItemDataSource(getCurrDocBean()); getBeanFields().setFieldFactory(DefaultFieldGroupFieldFactory.get()); getBeanFields().setReadOnly(getCurrDoc().isReadOnly()); final TextField t1 = (TextField) getBeanFields().buildAndBind("Title: ", "title"); t1.setNullRepresentation(""); t1.setSizeFull(); t1.setRequired(true); t1.setRequiredError("Please enter title"); final DateField d1 = getBeanFields().buildAndBind("Date: ", "date", DateField.class); d1.setRequired(true); d1.setRequiredError("Please enter date"); d1.setRangeStart(getStartDate()); d1.setRangeEnd(getEndDate()); final TextArea ta1 = getBeanFields().buildAndBind("Description: ", "description", TextArea.class); ta1.setSizeFull(); setCustomerCombo(new ComboBox("Customer:", KeyDateDatabaseUtils.getCustContainer())); getCustomerCombo().setInputPrompt("No Customer Selected"); getCustomerCombo().setFilteringMode(FilteringMode.STARTSWITH); getCustomerCombo().setImmediate(true); getCustomerCombo().setNewItemsAllowed(true); getCustomerCombo().setInvalidAllowed(false); getCustomerCombo().setNullSelectionAllowed(true); getCustomerCombo().setPageLength(5); getCustomerCombo().setWidth("100%"); getCustomerCombo().setResponsive(true); getBeanFields().bind(getCustomerCombo(), "customer"); getCustomerCombo().addValueChangeListener(new Property.ValueChangeListener() { private static final long serialVersionUID = 1L; /* * (non-Javadoc) * * @see * com.vaadin.data.Property.ValueChangeListener#valueChange(com. * vaadin.data.Property.ValueChangeEvent) */ @Override public void valueChange(com.vaadin.data.Property.ValueChangeEvent event) { getContactCombo().setContainerDataSource( KeyDateDatabaseUtils.getContactContainer((String) event.getProperty().getValue())); getContactCombo().setValue(""); } }); setContactCombo(new ComboBox("Contact:")); getContactCombo().setInputPrompt("No Contact Selected"); getContactCombo().setFilteringMode(FilteringMode.STARTSWITH); getContactCombo().setImmediate(true); getContactCombo().setNewItemsAllowed(true); getContactCombo().setInvalidAllowed(false); getContactCombo().setNullSelectionAllowed(true); getContactCombo().setPageLength(5); getContactCombo().setWidth("100%"); getContactCombo().setResponsive(true); getBeanFields().bind(getContactCombo(), "contact"); final HorizontalLayout buttonRow = new HorizontalLayout(); setSaveButton(new Button("Save")); getSaveButton().addStyleName(ValoTheme.BUTTON_PRIMARY); getSaveButton().setIcon(FontAwesome.SAVE); getSaveButton().setVisible(getCurrDoc().isEditable()); getSaveButton().addClickListener(new Button.ClickListener() { private static final long serialVersionUID = 1L; /* * (non-Javadoc) * * @see * com.vaadin.ui.Button.ClickListener#buttonClick(com.vaadin.ui. * Button.ClickEvent) */ @Override public void buttonClick(ClickEvent event) { getCurrDocBean().saveDocumentWrapper(getCurrDoc()); getCurrDoc().setEditMode(false); getCurrDoc().setReadOnly(true); getBeanFields().setReadOnly(true); getSaveButton().setVisible(false); getEditButton().setVisible(true); } }); setEditButton(new Button("Edit")); getEditButton().addStyleName(ValoTheme.BUTTON_PRIMARY); getEditButton().setIcon(FontAwesome.EDIT); getEditButton().setVisible(!getCurrDoc().isEditable()); getEditButton().addClickListener(new Button.ClickListener() { private static final long serialVersionUID = 1L; /* * (non-Javadoc) * * @see * com.vaadin.ui.Button.ClickListener#buttonClick(com.vaadin.ui. * Button.ClickEvent) */ @Override public void buttonClick(ClickEvent event) { getCurrDoc().setEditMode(true); getCurrDoc().setReadOnly(false); getBeanFields().setReadOnly(false); getEditButton().setVisible(false); getSaveButton().setVisible(true); } }); final Button cancelButton = new Button("Cancel"); cancelButton.addStyleName(ValoTheme.BUTTON_QUIET); cancelButton.setIcon(FontAwesome.UNDO); cancelButton.addClickListener(new Button.ClickListener() { private static final long serialVersionUID = 1L; /* * (non-Javadoc) * * @see * com.vaadin.ui.Button.ClickListener#buttonClick(com.vaadin.ui. * Button.ClickEvent) */ @Override public void buttonClick(ClickEvent event) { MainUI.get().getNavigator().navigateTo(MainView.VIEW_NAME); } }); buttonRow.addComponents(getEditButton(), getSaveButton(), cancelButton); getEditForm().addComponents(t1, d1, ta1, getCustomerCombo(), getContactCombo(), buttonRow); addComponent(editForm); } /** * Getter for loaded * * @return boolean whether the content has already been loaded */ public boolean isLoaded() { return loaded; } /** * Setter for loaded * * @param loaded * boolean whether or not the content has already been loaded */ public void setLoaded(boolean loaded) { this.loaded = loaded; } /** * Getter for currDoc * * @return KeyDateDocumentWrapper wrapper for backend document being edited */ public KeyDateDocumentWrapper getCurrDoc() { return currDoc; } /** * Setter for currDoc * * @param currDoc * KeyDateDocumentWrapper wrapper for backend document being * edited */ public void setCurrDoc(KeyDateDocumentWrapper currDoc) { this.currDoc = currDoc; } /** * @return the currDocBean */ public KeyDateBean getCurrDocBean() { return currDocBean; } /** * @param currDocBean * the currDocBean to set */ public void setCurrDocBean(KeyDateBean currDocBean) { this.currDocBean = currDocBean; } /** * Getter for endDate * * @return Date end date up to which users can create a Key Date, 5 years in * the future */ public Date getEndDate() { final Calendar cal = Calendar.getInstance(); cal.setTime(new Date()); cal.add(Calendar.YEAR, 5); return cal.getTime(); } /** * Getter for endDate * * @return Date end date up to which users can create a Key Date, 1 month in * the past */ public Date getStartDate() { final Calendar cal = Calendar.getInstance(); cal.setTime(new Date()); cal.add(Calendar.MONTH, -1); return cal.getTime(); } /** * Getter for editForm * * @return FormLayout editable form area, required to switch readOnly on and * off */ public FormLayout getEditForm() { return editForm; } /** * Setter for editForm * * @param editForm * FormLayout editable form area, required to switch readOnly on * and off */ public void setEditForm(FormLayout editForm) { this.editForm = editForm; } /** * Getter for customerCombo * * @return ComboBox for selecting (or adding) a customer */ public ComboBox getCustomerCombo() { return customerCombo; } /** * Setter for customerCombo * * @param customerCombo * ComboBox for selecting (or adding) a customer */ public void setCustomerCombo(ComboBox customerCombo) { this.customerCombo = customerCombo; } /** * Getter for contactCombo * * @return ComboBox for selecting (or adding) a contact */ public ComboBox getContactCombo() { return contactCombo; } /** * Setter for contactCombo * * @param contactCombo * ComboBox for selecting (or adding) a contact */ public void setContactCombo(ComboBox contactCombo) { this.contactCombo = contactCombo; } /** * Getter for beanFields * * @return BeanFieldGroup of fields from KeyDateBean object */ public BeanFieldGroup<KeyDateBean> getBeanFields() { return beanFields; } /** * Setter for beanFields * * @param beanFields * BeanFieldGroup of fields from KeyDateBean object */ public void setBeanFields(BeanFieldGroup<KeyDateBean> beanFields) { this.beanFields = beanFields; } /** * Getter for editButton * * @return Button for editing */ public Button getEditButton() { return editButton; } /** * Setter for editButton * * @param editButton * Button for editing */ public void setEditButton(Button editButton) { this.editButton = editButton; } /** * Getter for saveButton * * @return Button for saving */ public Button getSaveButton() { return saveButton; } /** * Setter for saveButton * * @param saveButton * Button for saving */ public void setSaveButton(Button saveButton) { this.saveButton = saveButton; } }