Java tutorial
/******************************************************************************* * Copyright (c) 2005, 2008 IBM Corporation 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: * IBM Corporation - initial API and implementation *******************************************************************************/ package com.siteview.mde.internal.ui.parts; import com.siteview.mde.core.monitor.*; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.jface.viewers.*; import org.eclipse.osgi.service.resolver.VersionRange; import com.siteview.mde.internal.core.MDECoreMessages; import com.siteview.mde.internal.core.util.VersionUtil; import com.siteview.mde.internal.ui.MDEPlugin; import com.siteview.mde.internal.ui.MDEUIMessages; import com.siteview.mde.internal.ui.util.PDELabelUtility; import org.eclipse.swt.SWT; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.*; import org.osgi.framework.Version; public class PluginVersionPart { private class PluginVersionTablePart extends TablePart { public PluginVersionTablePart(String[] buttonLabels) { super(buttonLabels); } protected void selectionChanged(IStructuredSelection selection) { if (selection.size() < 1) { setButtonEnabled(0, false); } else { setButtonEnabled(0, true); } } protected void handleDoubleClick(IStructuredSelection selection) { if (selection.size() == 1) { IMonitorModelBase entry = (IMonitorModelBase) selection.getFirstElement(); String version = VersionUtil .computeInitialPluginVersion(entry.getBundleDescription().getVersion().toString()); setVersion(version, ""); //$NON-NLS-1$ } } protected void buttonSelected(Button button, int index) { IStructuredSelection selection = (IStructuredSelection) getTableViewer().getSelection(); if (selection.size() == 1) { IMonitorModelBase entry = (IMonitorModelBase) selection.getFirstElement(); String version = VersionUtil .computeInitialPluginVersion(entry.getBundleDescription().getVersion().toString()); setVersion(version, ""); //$NON-NLS-1$ } else { // plug-ins come back in a sorted order so we assume min/max Object[] objects = selection.toArray(); IMonitorModelBase min = (IMonitorModelBase) objects[0]; IMonitorModelBase max = (IMonitorModelBase) objects[objects.length - 1]; String minVersion = VersionUtil .computeInitialPluginVersion(min.getBundleDescription().getVersion().toString()); String maxVersion = VersionUtil .computeInitialPluginVersion(max.getBundleDescription().getVersion().toString()); setVersion(minVersion, maxVersion); } } } private class PluginVersionContentProvider implements IStructuredContentProvider { public Object[] getElements(Object element) { if (element instanceof ModelEntry) { ModelEntry entry = (ModelEntry) element; return entry.getActiveModels(); } return new Object[0]; } public void dispose() { } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { } } private Text fMinVersionText; private Text fMaxVersionText; private Combo fMinVersionBound; private Combo fMaxVersionBound; private VersionRange fVersionRange; private boolean fIsRanged; private boolean fRangeAllowed; public PluginVersionPart(boolean rangeAllowed) { fRangeAllowed = rangeAllowed; } public void setVersion(String version) { try { if (version != null && !version.equals("")) { //$NON-NLS-1$ fVersionRange = new VersionRange(version); Version max = fVersionRange.getMaximum(); if (max.getMajor() != Integer.MAX_VALUE && fVersionRange.getMinimum().compareTo(fVersionRange.getMaximum()) < 0) fIsRanged = true; } } catch (IllegalArgumentException e) { // illegal version string passed fVersionRange = new VersionRange("[1.0.0,1.0.0]"); //$NON-NLS-1$ } } private void setVersion(String min, String max) { fMinVersionBound.select(0); fMinVersionText.setText(min); fMaxVersionBound.select(1); fMaxVersionText.setText(max); } public void createVersionFields(Composite comp, boolean createGroup, boolean editable) { if (fRangeAllowed) createRangeField(comp, createGroup, editable); else createSingleField(comp, createGroup, editable); preloadFields(); } public void createVersionSelectionField(Composite comp, String id) { Group group = new Group(comp, SWT.NONE); group.setText(MDEUIMessages.PluginVersionPart_groupTitle); group.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING | GridData.FILL_HORIZONTAL)); group.setLayout(new GridLayout(2, false)); PluginVersionTablePart part = new PluginVersionTablePart( new String[] { MDEUIMessages.PluginVersionPart_buttonTitle }); part.createControl(group, SWT.FULL_SELECTION | SWT.MULTI | SWT.V_SCROLL, 1, null); part.setMinimumSize(0, 75); part.getViewer().setLabelProvider(MDEPlugin.getDefault().getLabelProvider()); part.getViewer().setContentProvider(new PluginVersionContentProvider()); part.getViewer().setComparator(new ViewerComparator()); part.getViewer().setInput(MonitorRegistry.findEntry(id)); part.setButtonEnabled(0, false); } private void createRangeField(Composite parent, boolean createGroup, boolean editable) { if (createGroup) { parent = new Group(parent, SWT.NONE); ((Group) parent).setText(getGroupText()); parent.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); parent.setLayout(new GridLayout(3, false)); } String[] comboItems = new String[] { MDEUIMessages.DependencyPropertiesDialog_comboInclusive, MDEUIMessages.DependencyPropertiesDialog_comboExclusive }; Label minlabel = new Label(parent, SWT.NONE); minlabel.setText(MDEUIMessages.DependencyPropertiesDialog_minimumVersion); fMinVersionText = new Text(parent, SWT.SINGLE | SWT.BORDER); fMinVersionText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); fMinVersionText.setEnabled(editable); fMinVersionBound = new Combo(parent, SWT.SINGLE | SWT.BORDER | SWT.READ_ONLY); fMinVersionBound.setEnabled(editable); fMinVersionBound.setItems(comboItems); Label maxlabel = new Label(parent, SWT.NONE); maxlabel.setText(MDEUIMessages.DependencyPropertiesDialog_maximumVersion); fMaxVersionText = new Text(parent, SWT.SINGLE | SWT.BORDER); fMaxVersionText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); fMaxVersionText.setEnabled(editable); fMaxVersionBound = new Combo(parent, SWT.SINGLE | SWT.BORDER | SWT.READ_ONLY); fMaxVersionBound.setEnabled(editable); fMaxVersionBound.setItems(comboItems); } private void createSingleField(Composite parent, boolean createGroup, boolean editable) { if (createGroup) { parent = new Group(parent, SWT.NONE); ((Group) parent).setText(getGroupText()); parent.setLayoutData(new GridData(GridData.VERTICAL_ALIGN_BEGINNING | GridData.FILL_HORIZONTAL)); parent.setLayout(new GridLayout(2, false)); } Label label = new Label(parent, SWT.NONE); label.setText(MDEUIMessages.DependencyPropertiesDialog_version); fMinVersionText = new Text(parent, SWT.SINGLE | SWT.BORDER); fMinVersionText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL)); fMinVersionText.setEnabled(editable); } public void preloadFields() { if (fRangeAllowed) { fMinVersionText.setText((fVersionRange != null) ? fVersionRange.getMinimum().toString() : ""); //$NON-NLS-1$ fMaxVersionText .setText((fVersionRange != null && fVersionRange.getMaximum().getMajor() != Integer.MAX_VALUE) ? fVersionRange.getMaximum().toString() : ""); //$NON-NLS-1$ if (fVersionRange != null) fMinVersionBound.select((fVersionRange.getIncludeMinimum()) ? 0 : 1); else fMinVersionBound.select(0); if (fVersionRange != null && getMaxVersion().length() > 0) fMaxVersionBound.select((fVersionRange.getIncludeMaximum()) ? 0 : 1); else fMaxVersionBound.select(1); } fMinVersionText.setText((fVersionRange != null) ? fVersionRange.getMinimum().toString() : ""); //$NON-NLS-1$ } private IStatus validateVersion(String text, Text textWidget, boolean shortErrorMessage) { if (text.length() == 0) return Status.OK_STATUS; if (VersionUtil.validateVersion(text).getSeverity() != IStatus.OK) { String errorMessage = null; if (shortErrorMessage) { // For dialogs errorMessage = MDEUIMessages.DependencyPropertiesDialog_invalidFormat; } else { // For everything else: Field assist, wizards errorMessage = MDECoreMessages.BundleErrorReporter_InvalidFormatInBundleVersion; } return new Status(IStatus.ERROR, "com.siteview.mde.ui", //$NON-NLS-1$ IStatus.ERROR, PDELabelUtility.qualifyMessage(PDELabelUtility.getFieldLabel(textWidget), errorMessage), null); } return Status.OK_STATUS; } private IStatus validateVersionRange(boolean shortErrorMessage) { if ((!fRangeAllowed && getMinVersion().length() == 0) || (fRangeAllowed && (getMinVersion().length() == 0 || getMaxVersion().length() == 0))) { fIsRanged = false; return Status.OK_STATUS; } String errorMessage = null; if (shortErrorMessage) { // For dialogs errorMessage = MDEUIMessages.DependencyPropertiesDialog_invalidFormat; } else { // For everything else: Field assist, wizards errorMessage = MDECoreMessages.BundleErrorReporter_InvalidFormatInBundleVersion; } Version v1; Version v2; try { v1 = new Version(getMinVersion()); } catch (IllegalArgumentException e) { return new Status(IStatus.ERROR, "com.siteview.mde.ui", //$NON-NLS-1$ IStatus.ERROR, PDELabelUtility.qualifyMessage(PDELabelUtility.getFieldLabel(fMinVersionText), errorMessage), null); } if (!fRangeAllowed) // version created fine return Status.OK_STATUS; try { v2 = new Version(getMaxVersion()); } catch (IllegalArgumentException e) { return new Status(IStatus.ERROR, "com.siteview.mde.ui", //$NON-NLS-1$ IStatus.ERROR, PDELabelUtility.qualifyMessage(PDELabelUtility.getFieldLabel(fMaxVersionText), errorMessage), null); } if (v1.compareTo(v2) == 0 || v1.compareTo(v2) < 0) { fIsRanged = true; return Status.OK_STATUS; } return new Status(IStatus.ERROR, "com.siteview.mde.ui", //$NON-NLS-1$ IStatus.ERROR, MDEUIMessages.DependencyPropertiesDialog_versionRangeError, null); } /** * Short error messages are required for dialog status lines. Long error * messages are truncated and are not decorated with a status image. * @param shortErrorMessage if <code>true</code>, a brief error message * will be used. * @return an OK status if all versions are valid, otherwise the status's * message will contain an error message. */ public IStatus validateFullVersionRangeText(boolean shortErrorMessage) { IStatus status = validateVersion(getMinVersion(), fMinVersionText, shortErrorMessage); if (status.isOK()) status = validateVersion(getMaxVersion(), fMaxVersionText, shortErrorMessage); if (status.isOK()) status = validateVersionRange(shortErrorMessage); return status; } private String getMinVersion() { return fMinVersionText.getText().trim(); } private String getMaxVersion() { if (fMaxVersionText != null) return fMaxVersionText.getText().trim(); return ""; //$NON-NLS-1$ } private boolean getMinInclusive() { if (fMinVersionBound != null) return fMinVersionBound.getSelectionIndex() == 0; return false; } private boolean getMaxInclusive() { if (fMaxVersionBound != null) return fMaxVersionBound.getSelectionIndex() == 0; return true; } private String extractSingleVersionFromText() { if (!fRangeAllowed) return getMinVersion(); if (getMinVersion().length() == 0) return getMaxVersion(); return getMinVersion(); } public String getVersion() { String version; if (fIsRanged) { // if versions are equal they must be inclusive for a range to be valid // blindly set for the user String minV = getMinVersion(); String maxV = getMaxVersion(); boolean minI = getMinInclusive(); boolean maxI = getMaxInclusive(); if (minV.equals(maxV)) minI = maxI = true; version = new VersionRange(new Version(minV), minI, new Version(maxV), maxI).toString(); } else { String singleversion = extractSingleVersionFromText(); if (singleversion == null || singleversion.length() == 0) version = ""; //$NON-NLS-1$ else version = new Version(singleversion).toString(); } return version; } public void addListeners(ModifyListener minListener, ModifyListener maxListener) { if (fMinVersionText != null && minListener != null) fMinVersionText.addModifyListener(minListener); if (fRangeAllowed && fMaxVersionText != null && maxListener != null) fMaxVersionText.addModifyListener(maxListener); } protected String getGroupText() { return MDEUIMessages.DependencyPropertiesDialog_groupText; } }