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.Arrays; import java.util.List; import org.eclipse.core.databinding.DataBindingContext; import org.eclipse.core.databinding.beans.BeanProperties; import org.eclipse.core.databinding.observable.value.IValueChangeListener; 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.IDockerConnection; import org.eclipse.linuxtools.docker.core.IDockerContainer; import org.eclipse.linuxtools.internal.docker.ui.databinding.BaseDatabindingModel; import org.eclipse.linuxtools.internal.docker.ui.wizards.ImageRunSelectionModel.ContainerLinkModel; 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.Label; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Text; public class ContainerLinkDialog extends Dialog { private final IDockerConnection connection; private final ContainerLinkDialogModel model; private final List<String> containerNames; private final DataBindingContext dbc = new DataBindingContext(); public ContainerLinkDialog(final Shell shell, final IDockerConnection connection) { super(shell); this.connection = connection; this.model = new ContainerLinkDialogModel(); this.containerNames = WizardUtils.getContainerNames(connection); } public ContainerLinkDialog(final Shell shell, final IDockerConnection connection, final ContainerLinkModel selectedContainerLink) { super(shell); this.connection = connection; this.model = new ContainerLinkDialogModel(selectedContainerLink); this.containerNames = WizardUtils.getContainerNames(connection); } @Override protected void configureShell(final Shell shell) { super.configureShell(shell); setShellStyle(getShellStyle() | SWT.RESIZE); shell.setText(WizardMessages.getString("ContainerLinkDialog.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("ContainerLinkDialog.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("ContainerLinkDialog.containerLabel")); //$NON-NLS-1$ 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 containerSelectionComboViewer = new ComboViewer(containerSelectionCombo); containerSelectionComboViewer.setContentProvider(new ArrayContentProvider()); containerSelectionComboViewer.setInput(model.getContainerNames()); 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); final Label aliasLabel = new Label(container, SWT.NONE); aliasLabel.setText(WizardMessages.getString("ContainerLinkDialog.aliasLabel")); //$NON-NLS-1$ GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(false, false).applyTo(aliasLabel); final Text containerAliasText = new Text(container, SWT.BORDER); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).grab(true, false).applyTo(containerAliasText); // error message final Label errorMessageLabel = new Label(container, SWT.NONE); GridDataFactory.fillDefaults().align(SWT.FILL, SWT.CENTER).span(COLUMNS, 1).grab(true, false) .applyTo(errorMessageLabel); final ISWTObservableValue containerNameObservable = WidgetProperties.selection() .observe(containerSelectionComboViewer.getCombo()); dbc.bindValue(containerNameObservable, BeanProperties .value(ContainerLinkDialogModel.class, ContainerLinkDialogModel.CONTAINER_NAME).observe(model)); final ISWTObservableValue containerAliasObservable = WidgetProperties.text(SWT.Modify) .observe(containerAliasText); dbc.bindValue(containerAliasObservable, BeanProperties .value(ContainerLinkDialogModel.class, ContainerLinkDialogModel.CONTAINER_ALIAS).observe(model)); containerNameObservable.addValueChangeListener(onContainerLinkSettingsChanged()); containerAliasObservable.addValueChangeListener(onContainerLinkSettingsChanged()); return container; } private IValueChangeListener onContainerLinkSettingsChanged() { return event -> validateInput(); } public String getContainerName() { return model.getContainerName(); } public String getContainerAlias() { return model.getContainerAlias(); } /** * 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 void validateInput() { final String selectedContainerName = model.getContainerName(); final Object[] containerNames = model.getContainerNames().toArray(); final String containerAlias = model.getContainerAlias(); if (selectedContainerName == null || selectedContainerName.isEmpty()) { setOkButtonEnabled(false); } else if (Arrays.binarySearch(containerNames, 0, containerNames.length, selectedContainerName) < 0) { setOkButtonEnabled(false); } else if (containerAlias == null || containerAlias.isEmpty()) { setOkButtonEnabled(false); return; } else { setOkButtonEnabled(true); } } private void setOkButtonEnabled(final boolean enabled) { getButton(IDialogConstants.OK_ID).setEnabled(enabled); } class ContainerLinkDialogModel extends BaseDatabindingModel { public static final String CONTAINER_NAME = "containerName"; //$NON-NLS-1$ public static final String CONTAINER_ALIAS = "containerAlias"; //$NON-NLS-1$ private String containerName; private String containerAlias; public ContainerLinkDialogModel() { } public ContainerLinkDialogModel(final ContainerLinkModel selectedContainerLink) { this(); this.containerName = selectedContainerLink.getContainerName(); this.containerAlias = selectedContainerLink.getContainerAlias(); } public IDockerConnection getConnection() { return connection; } private List<String> getContainerNames() { return containerNames; } public List<IDockerContainer> getContainers() { return getConnection().getContainers(); } public String getContainerName() { return containerName; } public void setContainerName(final String containerName) { firePropertyChange(CONTAINER_NAME, this.containerName, this.containerName = containerName); } public String getContainerAlias() { return containerAlias; } public void setContainerAlias(final String containerAlias) { firePropertyChange(CONTAINER_ALIAS, this.containerAlias, this.containerAlias = containerAlias); } @Override public int hashCode() { final int prime = 31; int result = 1; result = prime * result + getOuterType().hashCode(); result = prime * result + ((containerAlias == null) ? 0 : containerAlias.hashCode()); result = prime * result + ((containerName == null) ? 0 : containerName.hashCode()); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj == null) return false; if (getClass() != obj.getClass()) return false; ContainerLinkDialogModel other = (ContainerLinkDialogModel) obj; if (!getOuterType().equals(other.getOuterType())) return false; if (containerAlias == null) { if (other.containerAlias != null) return false; } else if (!containerAlias.equals(other.containerAlias)) return false; if (containerName == null) { if (other.containerName != null) return false; } else if (!containerName.equals(other.containerName)) return false; return true; } private ContainerLinkDialog getOuterType() { return ContainerLinkDialog.this; } } }