Java tutorial
/* * Copyright 2014-2016 CyberVision, Inc. * * 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.kaaproject.kaa.server.admin.client.mvp.view.struct; import static org.kaaproject.kaa.server.admin.client.util.Utils.millisecondsToDateTimeString; import static org.kaaproject.kaa.server.admin.shared.util.Utils.isEmpty; import java.util.ArrayList; import java.util.List; import com.google.gwt.user.client.Window; import org.kaaproject.avro.ui.gwt.client.input.InputEvent; import org.kaaproject.avro.ui.gwt.client.input.InputEventHandler; import org.kaaproject.avro.ui.gwt.client.widget.SizedTextArea; import org.kaaproject.avro.ui.gwt.client.widget.SizedTextBox; import org.kaaproject.kaa.common.dto.AbstractStructureDto; import org.kaaproject.kaa.common.dto.UpdateStatus; import org.kaaproject.kaa.server.admin.client.mvp.view.widget.KaaAdminSizedTextBox; import org.kaaproject.kaa.server.admin.client.util.HasErrorMessage; import org.kaaproject.kaa.server.admin.client.util.Utils; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.dom.client.ClickHandler; import com.google.gwt.event.dom.client.HasClickHandlers; import com.google.gwt.event.shared.HandlerRegistration; import com.google.gwt.user.client.ui.Button; import com.google.gwt.user.client.ui.FlexTable; import com.google.gwt.user.client.ui.HasHorizontalAlignment; import com.google.gwt.user.client.ui.HasValue; import com.google.gwt.user.client.ui.HasVerticalAlignment; import com.google.gwt.user.client.ui.HorizontalPanel; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.Widget; public abstract class BaseStructView<T extends AbstractStructureDto, V> extends FlexTable implements InputEventHandler { private static final String REQUIRED = Utils.avroUiStyle.requiredField(); private HasErrorMessage hasErrorMessage; private Label dateTimeCreatedLabel; private SizedTextBox createdDateTime; private Label authorLabel; private SizedTextBox createdUsername; private Label dateTimeModifiedLabel; private SizedTextBox modifiedDateTime; private Label modifiedByLabel; private SizedTextBox modifiedUsername; private Label dateTimeActivatedLabel; private SizedTextBox activatedDateTime; private Label activatedByLabel; private SizedTextBox activatedUsername; private Label dateTimeDeactivatedLabel; private SizedTextBox deactivatedDateTime; private Label deactivatedByLabel; private SizedTextBox deactivatedUsername; private SizedTextArea description; protected HasValue<V> body; private Button saveButton; private Button activateButton; private Button deactivateButton; private Button downloadConfigurationButton; private boolean active; private Label bodyLabel; private HorizontalPanel buttonsPanel; protected List<HandlerRegistration> registrations = new ArrayList<HandlerRegistration>(); public BaseStructView(HasErrorMessage hasErrorMessage) { this.hasErrorMessage = hasErrorMessage; init(); } private void init() { getColumnFormatter().setWidth(0, "400px"); getColumnFormatter().setWidth(1, "400px"); // IE workaround getColumnFormatter().getElement(2).setAttribute("width", "0px"); FlexTable dateTable = new FlexTable(); FlexTable userTable = new FlexTable(); dateTable.getColumnFormatter().setWidth(0, "200px"); dateTable.getColumnFormatter().setWidth(1, "200px"); userTable.getColumnFormatter().setWidth(0, "200px"); userTable.getColumnFormatter().setWidth(1, "200px"); dateTimeCreatedLabel = new Label(Utils.constants.dateTimeCreated()); dateTimeCreatedLabel.setWidth("200px"); createdDateTime = new KaaAdminSizedTextBox(-1, false, false); createdDateTime.setWidth("200px"); dateTable.setWidget(0, 0, dateTimeCreatedLabel); dateTable.setWidget(0, 1, createdDateTime); dateTimeModifiedLabel = new Label(Utils.constants.dateTimeModified()); dateTimeModifiedLabel.setWidth("200px"); modifiedDateTime = new KaaAdminSizedTextBox(-1, false, false); modifiedDateTime.setWidth("200px"); dateTable.setWidget(1, 0, dateTimeModifiedLabel); dateTable.setWidget(1, 1, modifiedDateTime); dateTimeActivatedLabel = new Label(Utils.constants.dateTimeActivated()); dateTimeActivatedLabel.setWidth("200px"); activatedDateTime = new KaaAdminSizedTextBox(-1, false, false); activatedDateTime.setWidth("200px"); dateTable.setWidget(2, 0, dateTimeActivatedLabel); dateTable.setWidget(2, 1, activatedDateTime); dateTimeDeactivatedLabel = new Label(Utils.constants.dateTimeDectivated()); dateTimeDeactivatedLabel.setWidth("200px"); deactivatedDateTime = new KaaAdminSizedTextBox(-1, false, false); deactivatedDateTime.setWidth("200px"); dateTable.setWidget(3, 0, dateTimeDeactivatedLabel); dateTable.setWidget(3, 1, deactivatedDateTime); authorLabel = new Label(Utils.constants.author()); authorLabel.setWidth("200px"); createdUsername = new KaaAdminSizedTextBox(-1, false, false); createdUsername.setWidth("200px"); userTable.setWidget(0, 0, authorLabel); userTable.setWidget(0, 1, createdUsername); modifiedByLabel = new Label(Utils.constants.lastModifiedBy()); modifiedByLabel.setWidth("200px"); modifiedUsername = new KaaAdminSizedTextBox(-1, false, false); modifiedUsername.setWidth("200px"); userTable.setWidget(1, 0, modifiedByLabel); userTable.setWidget(1, 1, modifiedUsername); activatedByLabel = new Label(Utils.constants.activatedBy()); activatedByLabel.setWidth("200px"); activatedUsername = new KaaAdminSizedTextBox(-1, false, false); activatedUsername.setWidth("200px"); userTable.setWidget(2, 0, activatedByLabel); userTable.setWidget(2, 1, activatedUsername); deactivatedByLabel = new Label(Utils.constants.deactivatedBy()); deactivatedByLabel.setWidth("200px"); deactivatedUsername = new KaaAdminSizedTextBox(-1, false, false); deactivatedUsername.setWidth("200px"); userTable.setWidget(3, 0, deactivatedByLabel); userTable.setWidget(3, 1, deactivatedUsername); setWidget(0, 0, dateTable); setWidget(0, 1, userTable); FlexTable detailsTable = new FlexTable(); setWidget(1, 0, detailsTable); getFlexCellFormatter().setColSpan(1, 0, 3); detailsTable.getColumnFormatter().setWidth(0, "200px"); detailsTable.getColumnFormatter().setWidth(1, "600px"); // IE workaround detailsTable.getColumnFormatter().getElement(2).setAttribute("width", "0px"); description = new SizedTextArea(1024); description.setWidth("600px"); description.getTextArea().getElement().getStyle().setPropertyPx("minHeight", 100); Label descriptionLabel = new Label(Utils.constants.description()); descriptionLabel.setWidth("200px"); detailsTable.setWidget(0, 0, descriptionLabel); detailsTable.setWidget(0, 1, description); detailsTable.getCellFormatter().setVerticalAlignment(0, 0, HasVerticalAlignment.ALIGN_TOP); body = createBody(hasErrorMessage); if (hasLabel()) { bodyLabel = new Label(Utils.constants.body()); bodyLabel.setWidth("200px"); ((Widget) body).setWidth("600px"); detailsTable.setWidget(1, 0, bodyLabel); detailsTable.setWidget(1, 1, (Widget) body); detailsTable.getCellFormatter().setVerticalAlignment(1, 0, HasVerticalAlignment.ALIGN_TOP); } else { detailsTable.setWidget(1, 0, (Widget) body); detailsTable.getFlexCellFormatter().setColSpan(1, 0, 3); } buttonsPanel = new HorizontalPanel(); buttonsPanel.setSpacing(5); detailsTable.setWidget(2, 0, buttonsPanel); detailsTable.getCellFormatter().setHorizontalAlignment(2, 0, HasHorizontalAlignment.ALIGN_RIGHT); detailsTable.getFlexCellFormatter().setColSpan(2, 0, 2); saveButton = new Button(Utils.constants.save()); activateButton = new Button(Utils.constants.activate()); deactivateButton = new Button(Utils.constants.deactivate()); downloadConfigurationButton = new Button(Utils.constants.downloadConfiguration()); buttonsPanel.add(saveButton); buttonsPanel.add(activateButton); buttonsPanel.add(deactivateButton); buttonsPanel.add(downloadConfigurationButton); description.setFocus(true); saveButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent event) { updateSaveButton(false, false); } }); downloadConfigurationButton.addClickHandler(new ClickHandler() { @Override public void onClick(ClickEvent clickEvent) { String url = Window.Location.getHref(); Window.open("/kaaAdmin/servlet/kaaConfigurationDownloadServlet?schemaId=" + Utils.getSchemaIdFromUrl(url) + "&endGroupId=" + Utils.getEndpointGroupIdFromUrl(url), "_blank", "status=0,toolbar=0,menubar=0,location=0"); } }); } protected void prependButton(Button button) { buttonsPanel.insert(button, 0); } protected void addButton(Button button) { buttonsPanel.add(button); } protected abstract HasValue<V> createBody(HasErrorMessage hasErrorMessage); protected abstract boolean hasLabel(); protected abstract void setBodyReadOnly(boolean readOnly); protected abstract void setBodyValue(T struct); protected abstract HandlerRegistration addBodyChangeHandler(); protected abstract boolean validateBody(); protected abstract void onShown(); public void reset() { dateTimeCreatedLabel.setVisible(false); createdDateTime.setVisible(false); authorLabel.setVisible(false); createdUsername.setVisible(false); dateTimeModifiedLabel.setVisible(false); modifiedDateTime.setVisible(false); modifiedByLabel.setVisible(false); modifiedUsername.setVisible(false); dateTimeActivatedLabel.setVisible(false); activatedDateTime.setVisible(false); activatedByLabel.setVisible(false); activatedUsername.setVisible(false); dateTimeDeactivatedLabel.setVisible(false); deactivatedDateTime.setVisible(false); deactivatedByLabel.setVisible(false); deactivatedUsername.setVisible(false); description.setValue(""); body.setValue(null); saveButton.setVisible(false); activateButton.setVisible(false); deactivateButton.setVisible(false); if (hasLabel()) { bodyLabel.removeStyleName(REQUIRED); } description.getTextArea().setReadOnly(true); setBodyReadOnly(true); updateSaveButton(false, false); for (HandlerRegistration registration : registrations) { registration.removeHandler(); } registrations.clear(); } public void setReadOnly() { saveButton.setVisible(false); activateButton.setVisible(false); deactivateButton.setVisible(false); description.getTextArea().setReadOnly(true); setBodyReadOnly(true); for (HandlerRegistration registration : registrations) { registration.removeHandler(); } registrations.clear(); } public void setData(T struct) { this.active = struct.getStatus() != UpdateStatus.INACTIVE; if (!isEmpty(struct.getCreatedUsername())) { dateTimeCreatedLabel.setVisible(true); createdDateTime.setVisible(true); authorLabel.setVisible(true); createdUsername.setVisible(true); createdDateTime.setValue(millisecondsToDateTimeString(struct.getCreatedTime())); createdUsername.setValue(struct.getCreatedUsername()); } if (!isEmpty(struct.getModifiedUsername())) { dateTimeModifiedLabel.setVisible(true); modifiedDateTime.setVisible(true); modifiedByLabel.setVisible(true); modifiedUsername.setVisible(true); modifiedDateTime.setValue(millisecondsToDateTimeString(struct.getLastModifyTime())); modifiedUsername.setValue(struct.getModifiedUsername()); } if (!isEmpty(struct.getActivatedUsername())) { dateTimeActivatedLabel.setVisible(true); activatedDateTime.setVisible(true); activatedByLabel.setVisible(true); activatedUsername.setVisible(true); activatedDateTime.setValue(millisecondsToDateTimeString(struct.getActivatedTime())); activatedUsername.setValue(struct.getActivatedUsername()); } if (!isEmpty(struct.getDeactivatedUsername())) { dateTimeDeactivatedLabel.setVisible(true); deactivatedDateTime.setVisible(true); deactivatedByLabel.setVisible(true); deactivatedUsername.setVisible(true); deactivatedDateTime.setValue(millisecondsToDateTimeString(struct.getDeactivatedTime())); deactivatedUsername.setValue(struct.getDeactivatedUsername()); } description.setValue(struct.getDescription()); setBodyValue(struct); if (this.active) { if (struct.getStatus() == UpdateStatus.ACTIVE) { deactivateButton.setVisible(true); } } else { description.getTextArea().setReadOnly(false); setBodyReadOnly(false); if (hasLabel()) { bodyLabel.addStyleName(REQUIRED); } registrations.add(description.addInputHandler(this)); registrations.add(addBodyChangeHandler()); saveButton.setVisible(true); if (isEmpty(struct.getId())) { saveButton.setText(Utils.constants.save()); } else { activateButton.setVisible(true); } } } public void fireSchemaSelected() { fireChanged(); } public void setBodyLabelText(String text) { if (hasLabel()) { bodyLabel.setText(text); } } public HasValue<String> getDescription() { return description; } public HasValue<V> getBody() { return body; } public HasClickHandlers getSaveButton() { return saveButton; } public HasClickHandlers getActivateButton() { return activateButton; } public HasClickHandlers getDeactivateButton() { return deactivateButton; } @Override public void onInputChanged(InputEvent event) { fireChanged(); } public void fireChanged() { if (!this.active) { boolean valid = validateBody(); updateSaveButton(valid, !valid); } } private void updateSaveButton(boolean enabled, boolean invalid) { if (invalid) { saveButton.setText(Utils.constants.save()); } else { saveButton.setText(enabled ? Utils.constants.save() : Utils.constants.saved()); } saveButton.setEnabled(enabled); activateButton.setEnabled(!invalid && !enabled); } }