Java tutorial
/******************************************************************************* * Copyright (c) 2007, 2010 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 org.eclipse.equinox.internal.p2.ui.dialogs; import java.net.URI; import org.eclipse.core.runtime.IStatus; import org.eclipse.core.runtime.Status; import org.eclipse.equinox.internal.p2.ui.ProvUIActivator; import org.eclipse.equinox.internal.p2.ui.ProvUIMessages; import org.eclipse.equinox.p2.operations.RepositoryTracker; import org.eclipse.equinox.p2.ui.ProvisioningUI; import org.eclipse.jface.dialogs.*; import org.eclipse.jface.dialogs.Dialog; import org.eclipse.swt.SWT; import org.eclipse.swt.custom.BusyIndicator; import org.eclipse.swt.dnd.*; import org.eclipse.swt.events.ModifyEvent; import org.eclipse.swt.events.ModifyListener; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.*; /** * Class for showing a repository name and location * * @since 3.4 * */ public class RepositoryNameAndLocationDialog extends StatusDialog { Button okButton; Text url, nickname; ProvisioningUI ui; URI location; String name; public RepositoryNameAndLocationDialog(Shell parentShell, ProvisioningUI ui) { super(parentShell); this.ui = ui; setTitle(ProvUIMessages.RepositoryNameAndLocationDialog_Title); } protected void createButtonsForButtonBar(Composite parent) { okButton = createButton(parent, IDialogConstants.OK_ID, IDialogConstants.OK_LABEL, true); createButton(parent, IDialogConstants.CANCEL_ID, IDialogConstants.CANCEL_LABEL, false); } protected Control createDialogArea(Composite parent) { Composite comp = new Composite(parent, SWT.NONE); initializeDialogUnits(comp); GridLayout layout = new GridLayout(); layout.numColumns = 2; layout.marginTop = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING); nickname = createNameField(comp); url = createLocationField(comp); comp.setLayout(layout); GridData data = new GridData(); comp.setLayoutData(data); Dialog.applyDialogFont(comp); return comp; } /** * Return a RepositoryTracker appropriate for validating and adding the * repository. * * @return the Repository Tracker */ protected RepositoryTracker getRepositoryTracker() { return ui.getRepositoryTracker(); } protected void okPressed() { if (handleOk()) super.okPressed(); } protected boolean handleOk() { IStatus status = validateRepositoryURL(false); location = getUserLocation(); name = nickname.getText().trim(); return status.isOK(); } /** * Get the repository location as currently typed in by the user. Return null if there * is a problem with the URL. * * @return the URL currently typed in by the user. */ protected URI getUserLocation() { return getRepositoryTracker().locationFromString(url.getText().trim()); } /** * Get the location of the repository that was entered by the user. * Return <code>null</code> if no location was provided. * * @return the location of the repository that has been provided by the user. */ public URI getLocation() { return location; } /** * Get the name of the repository that was entered by the user. * Return <code>null</code> if no name was provided. * * @return the name of the repository that has been provided by the user. */ public String getName() { return name; } /** * Validate the repository URL, returning a status that is appropriate * for showing the user. The boolean indicates whether the repositories * should be consulted for validating the URL. For example, it is not * appropriate to contact the repositories on every keystroke. */ protected IStatus validateRepositoryURL(final boolean contactRepositories) { if (url == null || url.isDisposed()) return Status.OK_STATUS; final IStatus[] status = new IStatus[1]; status[0] = getRepositoryTracker().getInvalidLocationStatus(url.getText().trim()); final URI userLocation = getUserLocation(); if (url.getText().length() == 0) status[0] = new Status(IStatus.ERROR, ProvUIActivator.PLUGIN_ID, RepositoryTracker.STATUS_INVALID_REPOSITORY_LOCATION, ProvUIMessages.RepositoryGroup_URLRequired, null); else if (userLocation == null) status[0] = new Status(IStatus.ERROR, ProvUIActivator.PLUGIN_ID, RepositoryTracker.STATUS_INVALID_REPOSITORY_LOCATION, ProvUIMessages.AddRepositoryDialog_InvalidURL, null); else { BusyIndicator.showWhile(getShell().getDisplay(), new Runnable() { public void run() { status[0] = getRepositoryTracker().validateRepositoryLocation(ui.getSession(), userLocation, contactRepositories, null); } }); } // At this point the subclasses may have decided to opt out of // this dialog. if (status[0].getSeverity() == IStatus.CANCEL) { cancelPressed(); } setOkEnablement(status[0].isOK()); updateStatus(status[0]); return status[0]; } protected void updateButtonsEnableState(IStatus status) { setOkEnablement(!status.matches(IStatus.ERROR)); } protected void setOkEnablement(boolean enable) { if (okButton != null && !okButton.isDisposed()) okButton.setEnabled(enable); } protected String getInitialLocationText() { return "http://"; //$NON-NLS-1$ } protected String getInitialNameText() { return ""; //$NON-NLS-1$ } protected Text createNameField(Composite parent) { // Name: [] Label nameLabel = new Label(parent, SWT.NONE); nameLabel.setText(ProvUIMessages.AddRepositoryDialog_NameLabel); nickname = new Text(parent, SWT.BORDER); nickname.setText(getInitialNameText()); GridData data = new GridData(GridData.FILL_HORIZONTAL); data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.ENTRY_FIELD_WIDTH); nickname.setLayoutData(data); return nickname; } protected Text createLocationField(Composite parent) { // Location: [] Label urlLabel = new Label(parent, SWT.NONE); urlLabel.setText(ProvUIMessages.AddRepositoryDialog_LocationLabel); url = new Text(parent, SWT.BORDER); GridData data = new GridData(GridData.FILL_HORIZONTAL); data.widthHint = convertHorizontalDLUsToPixels(IDialogConstants.ENTRY_FIELD_WIDTH); url.setLayoutData(data); DropTarget target = new DropTarget(url, DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_LINK); target.setTransfer(new Transfer[] { URLTransfer.getInstance(), FileTransfer.getInstance() }); target.addDropListener(new TextURLDropAdapter(url, true)); url.addModifyListener(new ModifyListener() { public void modifyText(ModifyEvent e) { validateRepositoryURL(false); } }); url.setText(getInitialLocationText()); url.setSelection(0, url.getText().length()); return url; } protected ProvisioningUI getProvisioningUI() { return ui; } }