CmsSwtUi.java

   1 package org.argeo.cms.swt;
   2
   3 import org.argeo.api.cms.ux.CmsUi;
   4 import org.argeo.api.cms.ux.CmsView;
   5 import org.eclipse.swt.layout.GridLayout;
   6 import org.eclipse.swt.widgets.Composite;
   7
   8 /** A basic {@link CmsUi}, based on an SWT {@link Composite}. */
   9 public class CmsSwtUi extends Composite implements CmsUi {
  10
  11         private static final long serialVersionUID = -107939076610406448L;
  12
  13         /** Last time the UI was accessed. */
  14         private long lastAccess = System.currentTimeMillis();
  15 //      private TimerTask timeoutTask;
  16         private long uiTimeout = 0;
  17
  18         private CmsView cmsView;
  19
  20         public CmsSwtUi(Composite parent, int style) {
  21                 super(parent, style);
  22                 cmsView = CmsSwtUtils.getCmsView(parent);
  23                 setLayout(new GridLayout());
  24         }
  25
  26         @Override
  27         public CmsView getCmsView() {
  28                 return cmsView;
  29         }
  30
  31         @Override
  32         public void updateLastAccess() {
  33                 this.lastAccess = System.currentTimeMillis();
  34         }
  35
  36         public void setUiTimeout(long uiTimeout) {
  37 //              clearTimeoutTask();
  38                 this.uiTimeout = uiTimeout;
  39                 if (this.uiTimeout <= 0)
  40                         return;
  41                 // TODO introduce mechanism to check whether the UI is "zombie"
  42                 // (that is the UI thread still exists, but cannot execute anything)
  43 //              final long timeoutTaskPeriod = 60 * 60 * 1000;// 1h
  44 //              timeoutTask = cmsView.schedule(() -> {
  45 //                      disposeIfTimedout();
  46 //              }, timeoutTaskPeriod, timeoutTaskPeriod);
  47 //              addDisposeListener((e) -> {
  48 //                      clearTimeoutTask();
  49 //              });
  50         }
  51
  52 //      /** Must be run in UI thread. */
  53 //      public void disposeIfTimedout() {
  54 //              System.out.println("Enter disposeIfTimedout");
  55 //              if (isDisposed()) {
  56 //                      clearTimeoutTask();
  57 //                      return;
  58 //              }
  59 //              if (isTimedOut()) {
  60 //                      dispose();
  61 //                      clearTimeoutTask();
  62 //                      System.out.println("Disposed after timeout");
  63 //              }
  64 //      }
  65
  66 //      private void clearTimeoutTask() {
  67 //              if (timeoutTask != null) {
  68 //                      timeoutTask.cancel();
  69 //                      timeoutTask = null;
  70 //              }
  71 //      }
  72
  73         @Override
  74         public boolean isTimedOut() {
  75                 return uiTimeout > 0 && (System.currentTimeMillis() - lastAccess >= uiTimeout);
  76         }
  77
  78 //      class DisposeIfTimedOutTask implements Runnable {
  79 //              public void run() {
  80 //                      disposeIfTimedout();
  81 //                      getDisplay().timerExec(1000, new DisposeIfTimedOutTask());
  82 //              }
  83 //
  84 //      }
  85
  86 }