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.cdt.internal.docker.launcher; import java.io.File; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import org.eclipse.cdt.internal.docker.launcher.ContainerPropertyVolumesModel.MountType; import org.eclipse.core.databinding.Binding; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.UpdateValueStrategy; import org.eclipse.core.databinding.beans.BeanProperties; import org.eclipse.core.databinding.observable.IChangeListener; import org.eclipse.core.databinding.observable.value.IObservableValue; import org.eclipse.core.databinding.validation.ValidationStatus; import org.eclipse.core.runtime.IStatus; 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.ControlDecoration; 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.IDockerConnection; import org.eclipse.linuxtools.docker.core.IDockerContainer; import org.eclipse.linuxtools.docker.core.IDockerContainerInfo; import org.eclipse.linuxtools.internal.docker.ui.wizards.WizardMessages; import org.eclipse.linuxtools.internal.docker.ui.wizards.WizardUtils; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionListener; 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.DirectoryDialog; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.FileDialog; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; /** * @author xcoulon * */ public class ContainerDataVolumeDialog extends Dialog { private final DataVolumeModel model; private final DataBindingContext dbc = new DataBindingContext(); private final List<String> containerNames; private final IDockerConnection connection; public ContainerDataVolumeDialog(final Shell parentShell, final IDockerConnection connection, final DataVolumeModel selectedDataVolume) { super(parentShell); this.connection = connection; this.model = new DataVolumeModel(selectedDataVolume); this.containerNames = WizardUtils.getContainerNames(connection); } public ContainerDataVolumeDialog(final Shell parentShell, final IDockerConnection connection) { super(parentShell); this.connection = connection; this.model = new DataVolumeModel(); this.containerNames = WizardUtils.getContainerNames(connection); } public DataVolumeModel getDataVolume() { return model; } @Override protected void configureShell(final Shell shell) { super.configureShell(shell); setShellStyle(getShellStyle() | SWT.RESIZE); shell.setText(WizardMessages.getString("ContainerDataVolumeDialog.title")); //$NON-NLS-1$ } /** * 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 Point getInitialSize() { return new Point(450, super.getInitialSize().y); } @Override protected Control createDialogArea(final Composite parent) { final Composite container = new Composite(parent, SWT.NONE); final int COLUMNS = 3; GridDataFactory.fillDefaults().align(SWT.FILL, SWT.FILL).span(1, 1).grab(true, true).applyTo(container); GridLayoutFactory.fillDefaults().margins(10, 10).numColumns(COLUMNS).applyTo(container); // Container path final Label containerPathLabel = new Label(container, SWT.NONE); containerPathLabel.setText(WizardMessages.getString("ContainerDataVolumeDialog.containerPathLabel")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(false, false).applyTo(containerPathLabel); final Text containerPathText = new Text(container, SWT.BORDER); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(containerPathText); final IObservableValue containerPathObservable = BeanProperties .value(DataVolumeModel.class, DataVolumeModel.CONTAINER_PATH).observe(model); dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(containerPathText), containerPathObservable); // mount type final Label explanationLabel = new Label(container, SWT.NONE); explanationLabel.setText(WizardMessages.getString("ContainerDataVolumeDialog.explanationLabel")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).span(COLUMNS, 1).grab(true, false) .applyTo(explanationLabel); final int INDENT = 20; // No mount final Button noMountButton = new Button(container, SWT.RADIO); noMountButton.setText(WizardMessages.getString("ContainerDataVolumeDialog.noMountButton")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).indent(INDENT, 0).span(COLUMNS, 1) .grab(true, false).applyTo(noMountButton); bindButton(noMountButton, MountType.NONE); // File System mount final Button fileSystemMountButton = new Button(container, SWT.RADIO); fileSystemMountButton.setText(WizardMessages.getString("ContainerDataVolumeDialog.fileSystemMountButton")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).indent(INDENT, 0).span(COLUMNS, 1) .grab(true, false).applyTo(fileSystemMountButton); final Label hostPathLabel = new Label(container, SWT.NONE); hostPathLabel.setText(WizardMessages.getString("ContainerDataVolumeDialog.hostPathLabel")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).indent(2 * INDENT, SWT.DEFAULT) .grab(false, false).applyTo(hostPathLabel); final Text hostPathText = new Text(container, SWT.BORDER); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(hostPathText); final IObservableValue hostPathObservable = BeanProperties .value(DataVolumeModel.class, DataVolumeModel.HOST_PATH_MOUNT).observe(model); dbc.bindValue(WidgetProperties.text(SWT.Modify).observe(hostPathText), hostPathObservable); // browse for directory final Button hostPathDirectoryButton = new Button(container, SWT.NONE); hostPathDirectoryButton.setText(WizardMessages.getString("ContainerDataVolumeDialog.directoryButton")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(false, false) .applyTo(hostPathDirectoryButton); hostPathDirectoryButton.addSelectionListener(onHostDirectoryPath()); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(false, false) .applyTo(new Label(container, SWT.NONE)); // optional read-only access final Button readOnlyButton = new Button(container, SWT.CHECK); readOnlyButton.setText(WizardMessages.getString("ContainerDataVolumeDialog.readOnlyButton")); //$NON-NLS-1$ readOnlyButton.setToolTipText(WizardMessages.getString("ContainerDataVolumeDialog.readOnlyButtonTooltip")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).span(COLUMNS - 2, 1).grab(true, false) .applyTo(readOnlyButton); final ISWTObservableValue readOnlyButtonObservable = WidgetProperties.selection().observe(readOnlyButton); dbc.bindValue(readOnlyButtonObservable, BeanProperties.value(DataVolumeModel.class, DataVolumeModel.READ_ONLY_VOLUME).observe(model)); // browse for file final Button hostPathFileButton = new Button(container, SWT.NONE); hostPathFileButton.setText(WizardMessages.getString("ContainerDataVolumeDialog.fileButton")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(false, false).applyTo(hostPathFileButton); hostPathFileButton.addSelectionListener(onHostFilePath()); bindButton(fileSystemMountButton, MountType.HOST_FILE_SYSTEM, hostPathText, hostPathDirectoryButton, hostPathFileButton, readOnlyButton); // Container mount final Button containerMountButton = new Button(container, SWT.RADIO); containerMountButton.setText(WizardMessages.getString("ContainerDataVolumeDialog.containerMountButton")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).indent(INDENT, 0).span(COLUMNS, 1) .grab(true, false).applyTo(containerMountButton); final Label containerSelectionLabel = new Label(container, SWT.NONE); containerSelectionLabel .setText(WizardMessages.getString("ContainerDataVolumeDialog.containerSelectionLabel")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).indent(2 * INDENT, SWT.DEFAULT) .applyTo(containerSelectionLabel); final Combo containerSelectionCombo = new Combo(container, SWT.BORDER); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).span(1, 1) .applyTo(containerSelectionCombo); new ControlDecoration(containerSelectionCombo, SWT.TOP | SWT.LEFT); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(false, false) .applyTo(new Label(container, SWT.NONE)); bindButton(containerMountButton, MountType.CONTAINER, containerSelectionCombo); final ComboViewer containerSelectionComboViewer = new ComboViewer(containerSelectionCombo); containerSelectionComboViewer.setContentProvider(new ArrayContentProvider()); containerSelectionComboViewer.setInput(this.containerNames); final IObservableValue selectedContainerObservable = BeanProperties .value(DataVolumeModel.class, DataVolumeModel.CONTAINER_MOUNT).observe(model); dbc.bindValue(WidgetProperties.selection().observe(containerSelectionCombo), selectedContainerObservable); 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); } }, getContainerNameContentProposalProvider(containerSelectionCombo), null, null); // 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); 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(onDataVolumeSettingsChanged(errorMessageIcon, errorMessageLabel)); } } /** * Binds the given {@link MountType} to the given {@link Button} when it is * selected, and set the enablement of the associated {@link Control} at the * same time (ie: the {@link Control} are only enabled when the given * {@link Button} is selected. * * @param button * the {@link Button} to bind * @param mountType * the {@link MountType} to bind to the {@link Button} * @param controls * the {@link Control}s to enable or disable when the Button is * selected/unselected. * @return */ private Binding bindButton(final Button button, final MountType mountType, final Control... controls) { return dbc.bindValue(WidgetProperties.selection().observe(button), BeanProperties.value(DataVolumeModel.class, DataVolumeModel.MOUNT_TYPE).observe(model), new UpdateValueStrategy() { @Override public Object convert(Object value) { if (value.equals(Boolean.TRUE)) { setEnabled(controls, true); return mountType; } setEnabled(controls, false); return null; } private void setEnabled(final Control[] controls, final boolean enabled) { for (Control control : controls) { control.setEnabled(enabled); } } }, new UpdateValueStrategy() { @Override public Object convert(final Object value) { if (mountType.equals(value)) { button.setEnabled(true); } return mountType.equals(value); } }); } private SelectionListener onHostDirectoryPath() { return SelectionListener.widgetSelectedAdapter(e -> { final DirectoryDialog directoryDialog = new DirectoryDialog(getShell()); final String selectedPath = directoryDialog.open(); if (selectedPath != null) { model.setHostPathMount(selectedPath); } }); } private SelectionListener onHostFilePath() { return SelectionListener.widgetSelectedAdapter(e -> { final FileDialog fileDialog = new FileDialog(getShell()); final String selectedPath = fileDialog.open(); if (selectedPath != null) { model.setHostPathMount(selectedPath); } }); } /** * Creates an {@link IContentProposalProvider} to propose * {@link IDockerContainer} names based on the current text. * * @param items * @return */ private IContentProposalProvider getContainerNameContentProposalProvider(final Combo containerSelectionCombo) { return (contents, position) -> { final List<IContentProposal> proposals = new ArrayList<>(); for (String containerName : containerSelectionCombo.getItems()) { if (containerName.contains(contents)) { proposals.add(new ContentProposal(containerName, containerName, containerName, position)); } } return proposals.toArray(new IContentProposal[0]); }; } private IChangeListener onDataVolumeSettingsChanged(final Label errorMessageIcon, final Label errorMessageLabel) { return event -> { // skip if dialog has been closed if (Display.getCurrent() == null || getShell().isDisposed()) { return; } final IStatus status = validateInput(); 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); } }); }; } private IStatus validateInput() { final String containerPath = model.getContainerPath(); final MountType mountType = model.getMountType(); final String hostPath = model.getHostPathMount(); if (containerPath == null || containerPath.isEmpty()) { return ValidationStatus.error(null); } else if (mountType == null) { return ValidationStatus.error(null); } else if (mountType == MountType.HOST_FILE_SYSTEM && (hostPath == null || hostPath.isEmpty())) { return ValidationStatus.error(null); } else if (mountType == MountType.HOST_FILE_SYSTEM && !new File(hostPath).exists()) { return ValidationStatus.warning("The specified path does not exist on the host."); //$NON-NLS-1$ } else if (mountType == MountType.CONTAINER) { final IDockerContainer container = WizardUtils.getContainer(connection, model.getContainerMount()); if (container == null) { // just make sure that the dialog cannot complete return ValidationStatus.error(null); } final IDockerContainerInfo selectedContainerInfo = container.info(); if (selectedContainerInfo != null && selectedContainerInfo.volumes() != null && !selectedContainerInfo.volumes().containsKey(model.getContainerPath())) { return ValidationStatus .warning(WizardMessages.getFormattedString("ContainerDataVolumeDialog.volumeWarning", //$NON-NLS-1$ model.getContainerPath())); } } return ValidationStatus.ok(); } private void setOkButtonEnabled(final boolean enabled) { final Button okButton = getButton(IDialogConstants.OK_ID); // skip if 'OK' button does not exist yet. if (okButton != null) { okButton.setEnabled(enabled); } } }