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

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