Java tutorial
/******************************************************************************* * Copyright (c) 2016 Red Hat, Inc. * Distributed under license by Red Hat, Inc. All rights reserved. * This program is made available under the terms of the * Eclipse Public License v1.0 which accompanies this distribution, * and is available at http://www.eclipse.org/legal/epl-v10.html * * Contributors: * Red Hat, Inc. - initial API and implementation ******************************************************************************/ package org.jboss.tools.openshift.internal.common.ui; import org.eclipse.core.databinding.Binding; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.conversion.Converter; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.databinding.validation.IValidator; import org.eclipse.core.databinding.validation.ValidationStatus; import org.eclipse.core.resources.IProject; import org.eclipse.core.runtime.IStatus; import org.eclipse.jface.databinding.fieldassist.ControlDecorationSupport; import org.eclipse.jface.databinding.swt.ISWTObservableValue; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.jface.fieldassist.AutoCompleteField; import org.eclipse.jface.fieldassist.ControlDecoration; import org.eclipse.jface.fieldassist.FieldDecoration; import org.eclipse.jface.fieldassist.FieldDecorationRegistry; import org.eclipse.jface.fieldassist.TextContentAdapter; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.osgi.util.NLS; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionListener; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Text; import org.jboss.tools.common.ui.databinding.ValueBindingBuilder; import org.jboss.tools.openshift.common.core.utils.ProjectUtils; import org.jboss.tools.openshift.common.core.utils.StringUtils; import org.jboss.tools.openshift.internal.common.ui.databinding.RequiredControlDecorationUpdater; import org.jboss.tools.openshift.internal.common.ui.utils.UIUtils; public class SelectProjectComponentBuilder { String textLabel = "Use existing workspace project:"; String browseLabel = "Browse..."; String errorText = "Select an existing project"; int hSpan = 1; boolean required = true; IObservableValue<?> eclipseProjectObservable; SelectionListener selectionListener; ISWTObservableValue projectNameTextObservable; public SelectProjectComponentBuilder() { } public void build(Composite container, DataBindingContext dbc) { Label existingProjectLabel = new Label(container, SWT.NONE); existingProjectLabel.setText("Eclipse Project: "); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).applyTo(existingProjectLabel); final Text existingProjectNameText = new Text(container, SWT.BORDER); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).span(hSpan, 1).align(SWT.FILL, SWT.CENTER) .grab(true, false).applyTo(existingProjectNameText); projectNameTextObservable = WidgetProperties.text(SWT.Modify).observe(existingProjectNameText); Binding eclipseProjectBinding = ValueBindingBuilder.bind(projectNameTextObservable) .validatingAfterConvert(new IValidator() { @Override public IStatus validate(Object value) { if (value instanceof String) { return ValidationStatus.ok(); } else if (value == null) { if (required) { return ValidationStatus.error("Select an existing project"); } else if (!StringUtils.isEmpty(existingProjectNameText.getText())) { return ValidationStatus.error( NLS.bind("Project {0} does not exist", existingProjectNameText.getText())); } } return ValidationStatus.ok(); } }).converting(new Converter(String.class, IProject.class) { @Override public Object convert(Object fromObject) { String name = (String) fromObject; return ProjectUtils.getProject(name); } }).to(eclipseProjectObservable).converting(new Converter(IProject.class, String.class) { @Override public Object convert(Object fromObject) { return fromObject == null ? "" : ((IProject) fromObject).getName(); } }).in(dbc); ControlDecorationSupport.create(eclipseProjectBinding, SWT.LEFT | SWT.TOP, null, new RequiredControlDecorationUpdater(true)); // project name content assist ControlDecoration dec = new ControlDecoration(existingProjectNameText, SWT.TOP | SWT.RIGHT); FieldDecoration contentProposalFieldIndicator = FieldDecorationRegistry.getDefault() .getFieldDecoration(FieldDecorationRegistry.DEC_CONTENT_PROPOSAL); dec.setImage(contentProposalFieldIndicator.getImage()); dec.setDescriptionText("Auto-completion is enabled when you start typing a project name."); dec.setShowOnlyOnFocus(true); new AutoCompleteField(existingProjectNameText, new TextContentAdapter(), ProjectUtils.getAllAccessibleProjectNames()); // browse projects Button browseProjectsButton = new Button(container, SWT.NONE); browseProjectsButton.setText("Browse..."); GridDataFactory.fillDefaults().align(SWT.LEFT, SWT.CENTER).grab(false, false).applyTo(browseProjectsButton); UIUtils.setDefaultButtonWidth(browseProjectsButton); browseProjectsButton.addSelectionListener(selectionListener); } /** * Set value of label at text input. Has only effect if called before build(). * * @param label * @return self for chaining */ public SelectProjectComponentBuilder setTextLabel(String label) { textLabel = label; return this; } /** * Set value of model observable. Has only effect if called before build(). * * @param label * @return self for chaining */ public SelectProjectComponentBuilder setEclipseProjectObservable(IObservableValue<?> eclipseProjectObservable) { this.eclipseProjectObservable = eclipseProjectObservable; return this; } /** * Set number of columns in the grid to take by text input. * Grid needs one column for label, hSpan columns for text input, and one column for browse button. * Has only effect if called before build(). * * @param label * @return */ public SelectProjectComponentBuilder setHorisontalSpan(int hSpan) { this.hSpan = hSpan; return this; } /** * By default input is required. * Set to false if selecting a project is not required. * Has only effect if called before build(). * @param required * @return self for chaining */ public SelectProjectComponentBuilder setRequired(boolean required) { this.required = required; return this; } /** * Set selection listener that will run a customized dialog and consume selected project. * Has only effect if called before build(). * * @param label * @return self for chaining */ public SelectProjectComponentBuilder setSelectionListener(SelectionListener listener) { selectionListener = listener; return this; } /** * Returns swt observable for text input. Has only effect if called after build(). * * @param label * @return */ public ISWTObservableValue getProjectNameTextObservable() { return projectNameTextObservable; } }