bundles/org.simantics.project/src/org/simantics/project/management/install/SWTInstallAdvisor.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2008 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Eclipse Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/epl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.simantics.project.management.install;
  12
  13 import org.eclipse.core.runtime.IStatus;
  14 import org.eclipse.equinox.internal.provisional.p2.installer.IInstallOperation;
  15 import org.eclipse.equinox.internal.provisional.p2.installer.InstallAdvisor;
  16 import org.eclipse.equinox.internal.provisional.p2.installer.InstallDescription;
  17 import org.eclipse.swt.widgets.Display;
  18
  19 /**
  20  * Install context that creates a simple SWT-based UI and interacts with a user.
  21  */
  22 public class SWTInstallAdvisor extends InstallAdvisor {
  23         private InstallDialog dialog;
  24         private boolean started = false;
  25         private boolean stopped = false;
  26
  27         public IStatus performInstall(IInstallOperation operation) {
  28                 return dialog.run(operation);
  29         }
  30
  31         public InstallDescription prepareInstallDescription(InstallDescription description) {
  32                 if (description.getInstallLocation() == null)
  33                         dialog.promptForLocations(description);
  34                 return description;
  35         }
  36
  37         public boolean promptForLaunch(InstallDescription description) {
  38                 return dialog.promptForLaunch(description);
  39         }
  40
  41         public void setResult(IStatus status) {
  42                 String message;
  43                 if (status.getSeverity() == IStatus.CANCEL) {
  44                         message = "Canceled";
  45                 } else {
  46                         message = status.getMessage();
  47                 }
  48                 dialog.promptForClose(message);
  49         }
  50
  51         public synchronized void start() {
  52                 if (stopped || started)
  53                         return;
  54                 started = true;
  55                 Display display = Display.getCurrent();
  56                 if (display == null)
  57                         display = new Display();
  58                 dialog = new InstallDialog();
  59                 dialog.setMessage("Preparing");
  60         }
  61
  62         public synchronized void stop() {
  63                 if (stopped || !started)
  64                         return;
  65                 stopped = true;
  66                 final InstallDialog activeDialog = dialog;
  67                 if (activeDialog == null)
  68                         return;
  69                 //clear the window now, so the reference is gone no matter what happens during cleanup
  70                 dialog = null;
  71                 final Display display = activeDialog.getDisplay();
  72                 if (display == null || display.isDisposed())
  73                         return;
  74                 display.syncExec(new Runnable() {
  75                         public void run() {
  76                                 activeDialog.close();
  77                         }
  78                 });
  79                 display.dispose();
  80         }
  81
  82 }