Java tutorial
/******************************************************************************* * Copyright (c) 2015, 2016 Red Hat Inc. and others. * All rights reserved. This program and the accompanying materials * are 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 - Initial Contribution *******************************************************************************/ package org.eclipse.linuxtools.internal.docker.ui.wizards; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.core.databinding.Binding; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.beans.BeanProperties; import org.eclipse.core.databinding.observable.IChangeListener; import org.eclipse.core.databinding.validation.ValidationStatus; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.databinding.swt.ISWTObservableValue; import org.eclipse.jface.databinding.swt.WidgetProperties; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.jface.dialogs.IDialogConstants; import org.eclipse.jface.fieldassist.ComboContentAdapter; import org.eclipse.jface.fieldassist.ContentProposal; import org.eclipse.jface.fieldassist.ContentProposalAdapter; import org.eclipse.jface.fieldassist.IContentProposal; import org.eclipse.jface.fieldassist.IContentProposalProvider; import org.eclipse.jface.layout.GridDataFactory; import org.eclipse.jface.layout.GridLayoutFactory; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.ComboViewer; import org.eclipse.linuxtools.docker.core.DockerConnectionManager; import org.eclipse.linuxtools.docker.core.IDockerConnection; import org.eclipse.linuxtools.docker.core.IDockerContainer; import org.eclipse.linuxtools.internal.docker.ui.SWTImagesFactory; import org.eclipse.linuxtools.internal.docker.ui.databinding.BaseDatabindingModel; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Combo; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; /** * {@link Dialog} to specify Docker Image build options at launch time. */ public class ImageBuildDialog extends Dialog { private final ImageBuildDialogModel model = new ImageBuildDialogModel(); private final DataBindingContext dbc = new DataBindingContext(); public ImageBuildDialog(Shell parentShell) { super(parentShell); } @Override protected void configureShell(final Shell shell) { super.configureShell(shell); setShellStyle(getShellStyle() | SWT.RESIZE); shell.setText(WizardMessages.getString("ImageBuildDialog.title")); //$NON-NLS-1$ } @Override protected Point getInitialSize() { return new Point(400, super.getInitialSize().y); } /** * Disable the 'OK' button by default */ @Override protected Button createButton(Composite parent, int id, String label, boolean defaultButton) { final Button button = super.createButton(parent, id, label, defaultButton); if (id == IDialogConstants.OK_ID) { button.setEnabled(false); } return button; } @Override protected Control createDialogArea(final Composite parent) { final int COLUMNS = 2; final Composite container = new Composite(parent, SWT.NONE); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).span(COLUMNS, 1).grab(true, false) .applyTo(container); GridLayoutFactory.fillDefaults().numColumns(COLUMNS).margins(10, 10).applyTo(container); final Label explanationLabel = new Label(container, SWT.NONE); explanationLabel.setText(WizardMessages.getString("ImageBuildDialog.explanationLabel")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).span(COLUMNS, 1).grab(false, false) .applyTo(explanationLabel); final Label containerLabel = new Label(container, SWT.NONE); containerLabel.setText(WizardMessages.getString("ImageBuildDialog.connectionLabel")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(false, false).applyTo(containerLabel); final Combo containerSelectionCombo = new Combo(container, SWT.NONE); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false) .applyTo(containerSelectionCombo); final ComboViewer connectionSelectionComboViewer = new ComboViewer(containerSelectionCombo); connectionSelectionComboViewer.setContentProvider(new ArrayContentProvider()); final List<String> connectionNames = model.getConnectionNames(); connectionSelectionComboViewer.setInput(connectionNames); new ContentProposalAdapter(containerSelectionCombo, new ComboContentAdapter() { @Override public void insertControlContents(Control control, String text, int cursorPosition) { final Combo combo = (Combo) control; final Point selection = combo.getSelection(); combo.setText(text); selection.x = text.length(); selection.y = selection.x; combo.setSelection(selection); } }, getConnectionNameContentProposalProvider(containerSelectionCombo), null, null); final Label repoNameLabel = new Label(container, SWT.NONE); repoNameLabel.setText(WizardMessages.getString("ImageBuildDialog.repoNameLabel")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(false, false).applyTo(repoNameLabel); final Text repoNameText = new Text(container, SWT.BORDER); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(repoNameText); final ISWTObservableValue connnectionNameObservable = WidgetProperties.selection() .observe(connectionSelectionComboViewer.getCombo()); // pre-select with first connection if (!connectionNames.isEmpty()) { model.setConnectionName(connectionNames.get(0)); } // error message final Composite errorContainer = new Composite(container, SWT.NONE); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).span(COLUMNS, 1).grab(true, true) .applyTo(errorContainer); GridLayoutFactory.fillDefaults().margins(6, 6).numColumns(2).applyTo(errorContainer); final Label errorMessageIcon = new Label(errorContainer, SWT.NONE); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).hint(20, SWT.DEFAULT).applyTo(errorMessageIcon); final Label errorMessageLabel = new Label(errorContainer, SWT.NONE); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(errorMessageLabel); dbc.bindValue(connnectionNameObservable, BeanProperties .value(ImageBuildDialogModel.class, ImageBuildDialogModel.CONNECTION_NAME).observe(model)); final ISWTObservableValue repoNameObservable = WidgetProperties.text(SWT.Modify).observe(repoNameText); dbc.bindValue(repoNameObservable, BeanProperties.value(ImageBuildDialogModel.class, ImageBuildDialogModel.REPO_NAME).observe(model)); // must be called after bindings were set setupValidationSupport(errorMessageIcon, errorMessageLabel); return container; } private void setupValidationSupport(final Label errorMessageIcon, final Label errorMessageLabel) { for (@SuppressWarnings("unchecked") Iterator<Binding> iterator = dbc.getBindings().iterator(); iterator.hasNext();) { final Binding binding = iterator.next(); binding.getModel().addChangeListener(onBuildSettingsChanged(errorMessageIcon, errorMessageLabel)); } } private IChangeListener onBuildSettingsChanged(final Label errorMessageIcon, final Label errorMessageLabel) { return event -> { final IStatus status = validateInput(); if (Display.getCurrent() == null) { return; } Display.getCurrent().syncExec(() -> { if (status.isOK()) { errorMessageIcon.setVisible(false); errorMessageLabel.setVisible(false); setOkButtonEnabled(true); } else if (status.matches(IStatus.WARNING)) { errorMessageIcon.setVisible(true); errorMessageIcon.setImage(SWTImagesFactory.DESC_WARNING.createImage()); errorMessageLabel.setVisible(true); errorMessageLabel.setText(status.getMessage()); setOkButtonEnabled(true); } else if (status.matches(IStatus.ERROR)) { if (status.getMessage() != null && !status.getMessage().isEmpty()) { errorMessageIcon.setVisible(true); errorMessageIcon.setImage(SWTImagesFactory.DESC_ERROR.createImage()); errorMessageLabel.setVisible(true); errorMessageLabel.setText(status.getMessage()); } setOkButtonEnabled(false); } }); }; } /** * Validates that the selected {@link IDockerConnection} exists and that the * optional image name is valid. * * @return a validation status */ private IStatus validateInput() { final String selectedConnectionName = model.getConnectionName(); final String repoName = model.getRepoName(); if (selectedConnectionName == null || selectedConnectionName.isEmpty()) { return Status.CANCEL_STATUS; } else if (!model.getConnectionNames().contains(selectedConnectionName)) { return ValidationStatus .error(WizardMessages.getFormattedString("ImageBuildDialog.error.unknownConnection", //$NON-NLS-1$ selectedConnectionName)); } else if (repoName == null || repoName.isEmpty()) { return ValidationStatus.warning(WizardMessages.getString("ImageBuildDialog.warning.missingRepoName")); //$NON-NLS-1$ } else { final ImageNameValidator imageNameValidator = new ImageNameValidator(); return imageNameValidator.validate(repoName); } } public IDockerConnection getConnection() { return DockerConnectionManager.getInstance().findConnection(model.connectionName); } public String getRepoName() { return model.getRepoName(); } /** * Creates an {@link IContentProposalProvider} to propose * {@link IDockerContainer} names based on the current text. * * @param items * @return */ private IContentProposalProvider getConnectionNameContentProposalProvider( final Combo connectionNamesSelectionCombo) { return (contents, position) -> { final List<IContentProposal> proposals = new ArrayList<>(); for (String connectionName : connectionNamesSelectionCombo.getItems()) { if (connectionName.contains(contents)) { proposals.add(new ContentProposal(connectionName, connectionName, connectionName, position)); } } return proposals.toArray(new IContentProposal[0]); }; } private void setOkButtonEnabled(final boolean enabled) { getButton(IDialogConstants.OK_ID).setEnabled(enabled); } class ImageBuildDialogModel extends BaseDatabindingModel { public static final String CONNECTION_NAME = "connectionName"; //$NON-NLS-1$ public static final String REPO_NAME = "repoName"; //$NON-NLS-1$ private String connectionName; private String repoName; private final List<String> connectionNames = DockerConnectionManager.getInstance().getConnectionNames(); public String getRepoName() { return repoName; } public List<String> getConnectionNames() { return connectionNames; } public void setRepoName(final String repoName) { firePropertyChange(REPO_NAME, this.repoName, this.repoName = repoName); } public String getConnectionName() { return connectionName; } public void setConnectionName(final String connectionName) { firePropertyChange(CONNECTION_NAME, this.connectionName, this.connectionName = connectionName); } } }