Java tutorial
// Copyright 2010 Google Inc. All Rights Reseved. // // 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 com.google.testing.testify.risk.frontend.client.view.impl; import com.google.common.collect.Lists; import com.google.gwt.core.client.GWT; import com.google.gwt.event.dom.client.ChangeEvent; import com.google.gwt.event.dom.client.ClickEvent; import com.google.gwt.event.logical.shared.ValueChangeEvent; import com.google.gwt.event.logical.shared.ValueChangeHandler; import com.google.gwt.uibinder.client.UiBinder; import com.google.gwt.uibinder.client.UiField; import com.google.gwt.uibinder.client.UiHandler; import com.google.gwt.user.client.Window; import com.google.gwt.user.client.ui.CheckBox; import com.google.gwt.user.client.ui.Composite; import com.google.gwt.user.client.ui.FlowPanel; import com.google.gwt.user.client.ui.Image; import com.google.gwt.user.client.ui.Label; import com.google.gwt.user.client.ui.TextArea; import com.google.gwt.user.client.ui.Widget; import com.google.testing.testify.risk.frontend.client.util.NotificationUtil; import com.google.testing.testify.risk.frontend.client.view.AttributeView; import com.google.testing.testify.risk.frontend.client.view.widgets.EditableLabel; import com.google.testing.testify.risk.frontend.client.view.widgets.LabelWidget; import com.google.testing.testify.risk.frontend.model.AccLabel; import java.util.Collection; import java.util.List; // TODO(chrsmith): Merge ComponentViewImpl and AttributeViewImpl into a single widget. /** * Widget for displaying an Attribute. * * @author chrsmith@google.com (Chris Smith) */ public class AttributeViewImpl extends Composite implements AttributeView { /** * Used to wire parent class to associated UI Binder. */ interface AttributeViewImplUiBinder extends UiBinder<Widget, AttributeViewImpl> { } private static final AttributeViewImplUiBinder uiBinder = GWT.create(AttributeViewImplUiBinder.class); @UiField protected Label attributeGripper; @UiField protected EditableLabel attributeName; @UiField protected TextArea description; @UiField protected Label attributeId; @UiField protected Image deleteAttributeImage; @UiField protected FlowPanel labelsPanel; @UiField protected CheckBox signoffBox; private LabelWidget addLabelWidget; private boolean editingEnabled = false; /** Presenter associated with this View */ private Presenter presenter; private final Collection<String> labelSuggestions = Lists.newArrayList(); public AttributeViewImpl() { initWidget(uiBinder.createAndBindUi(this)); description.getElement().setAttribute("placeholder", "Enter description of this attribute..."); } @UiHandler("signoffBox") protected void onSignoffClicked(ClickEvent event) { presenter.updateSignoff(signoffBox.getValue()); } @UiHandler("description") protected void onDescriptionChange(ChangeEvent event) { presenter.onDescriptionEdited(description.getText()); } /** Wires renaming the Attribute in the UI to the backing presenter. */ @UiHandler("attributeName") protected void onAttributeNameChanged(ValueChangeEvent<String> event) { if (presenter != null) { if (event.getValue().length() == 0) { NotificationUtil.displayErrorMessage("Invalid name for Attribute."); presenter.refreshView(); } else { presenter.onRename(event.getValue()); } } } /** * Handler for the deleteComponentButton's click event, removing the Component. */ @UiHandler("deleteAttributeImage") protected void onDeleteAttributeImageClicked(ClickEvent event) { String promptText = "Are you sure you want to remove " + attributeName.getText() + "?"; if (Window.confirm(promptText)) { presenter.onRemove(); } } /** * Updates the label suggestions for all labels on this view. */ public void setLabelSuggestions(Collection<String> labelSuggestions) { this.labelSuggestions.clear(); this.labelSuggestions.addAll(labelSuggestions); for (Widget w : labelsPanel) { if (w instanceof LabelWidget) { LabelWidget l = (LabelWidget) w; l.setLabelSuggestions(this.labelSuggestions); } } } /** * Displays a new Component Label on this Widget. */ public void displayLabel(final AccLabel label) { final LabelWidget labelWidget = new LabelWidget(label.getLabelText()); labelWidget.setLabelSuggestions(labelSuggestions); labelWidget.setEditable(editingEnabled); labelWidget.addValueChangeHandler(new ValueChangeHandler<String>() { @Override public void onValueChange(ValueChangeEvent<String> event) { if (event.getValue() == null) { labelsPanel.remove(labelWidget); presenter.onRemoveLabel(label); } else { presenter.onUpdateLabel(label, event.getValue()); } } }); labelsPanel.add(labelWidget); } /** Updates the Widget's list of regular labels. */ @Override public void setLabels(List<AccLabel> labels) { labelsPanel.clear(); for (AccLabel label : labels) { displayLabel(label); } addBlankLabel(); } private void addBlankLabel() { final String newText = "new label"; addLabelWidget = new LabelWidget(newText, true); addLabelWidget.setLabelSuggestions(labelSuggestions); addLabelWidget.setVisible(editingEnabled); addLabelWidget.addValueChangeHandler(new ValueChangeHandler<String>() { @Override public void onValueChange(ValueChangeEvent<String> event) { presenter.onAddLabel(event.getValue()); labelsPanel.remove(addLabelWidget); addBlankLabel(); } }); addLabelWidget.setEditable(true); labelsPanel.add(addLabelWidget); } @Override public Widget asWidget() { return this; } /** * Hides this widget, equivalent to setVisible(false). */ @Override public void hide() { setVisible(false); } /** * Binds this View to a given Presenter for two-way communication. */ @Override public void setPresenter(Presenter presenter) { this.presenter = presenter; } /** * Sets the UI to display the Attribute's name. */ @Override public void setAttributeName(String name) { if (name != null) { attributeName.setText(name); } } /** * Sets the UI to display the Attribute's ID. */ @Override public void setAttributeId(Long id) { if (id != null) { attributeId.setText(id.toString()); } } @Override public void enableEditing() { editingEnabled = true; attributeGripper.setVisible(true); signoffBox.setEnabled(true); attributeName.setReadOnly(false); deleteAttributeImage.setVisible(true); description.setEnabled(true); for (Widget widget : labelsPanel) { LabelWidget label = (LabelWidget) widget; label.setEditable(true); } if (addLabelWidget != null) { addLabelWidget.setVisible(true); } } @Override public void setSignedOff(boolean signedOff) { signoffBox.setValue(signedOff); } /** Returns the ID of the underlying Attribute if applicable. Otherwise returns -1. */ public long getAttributeId() { try { return Long.parseLong(attributeId.getText()); } catch (NumberFormatException nfe) { return -1; } } @Override public void setDescription(String description) { this.description.setText(description == null ? "" : description); } }