eu.etaxonomy.taxeditor.store/src/main/java/eu/etaxonomy/taxeditor/view/AbstractCdmEditorViewPart.java

   1 /**
   2  *
   3  */
   4 package eu.etaxonomy.taxeditor.view;
   5
   6 import org.eclipse.jface.viewers.ISelection;
   7 import org.eclipse.swt.widgets.Composite;
   8 import org.eclipse.swt.widgets.Display;
   9 import org.eclipse.ui.IEditorPart;
  10 import org.eclipse.ui.IWorkbenchPart;
  11
  12 import eu.etaxonomy.taxeditor.editor.ISecuredEditor;
  13 import eu.etaxonomy.taxeditor.model.AbstractUtility;
  14 import eu.etaxonomy.taxeditor.model.IDirtyMarkableSelectionProvider;
  15
  16 /**
  17  * <p>
  18  * Abstract AbstractCdmEditorViewPart class.
  19  * </p>
  20  *
  21  * @author n.hoffmann
  22  * @created Sep 21, 2010
  23  * @version 1.0
  24  */
  25 public abstract class AbstractCdmEditorViewPart extends AbstractCdmViewPart {
  26
  27     private DelaySelection delaySelection = null;
  28     /**
  29      * This is the monitor for the DelaySelection runnable.
  30      * If it is <code>true</code> then it is currently delaying a selection.
  31      */
  32     private boolean isInDelay = false;
  33
  34
  35     /**
  36      * This class invokes internal_selectionChanged() in a separate thread.
  37      * This allows an asynchronous and/or delayed handling of selection changes
  38      */
  39     private class DelaySelection implements Runnable{
  40         private IWorkbenchPart part;
  41         private ISelection selection;
  42
  43         public DelaySelection(IWorkbenchPart part, ISelection selection) {
  44             super();
  45             this.part = part;
  46             this.selection = selection;
  47         }
  48
  49         /* (non-Javadoc)
  50          * @see java.lang.Runnable#run()
  51          */
  52         @Override
  53         public void run() {
  54             internal_selectionChanged(part, selection);
  55             isInDelay = false;
  56         }
  57
  58         public synchronized void setSelection(ISelection selection) {
  59             this.selection = selection;
  60         }
  61
  62         public synchronized void setPart(IWorkbenchPart part) {
  63             this.part = part;
  64         }
  65
  66     }
  67
  68     /**
  69      * Handle selection change events here and <b>not</b> in
  70      * {@link AbstractCdmEditorViewPart#selectionChanged(IWorkbenchPart, ISelection)}
  71      * if you want asynchronous selection handling.
  72      * @param part The workbench part that has issued the selection change
  73      * @param selection the new selection
  74      */
  75     protected abstract void internal_selectionChanged(IWorkbenchPart part, ISelection selection);
  76
  77     /** {@inheritDoc} */
  78     @Override
  79     public void selectionChanged(IWorkbenchPart part, ISelection selection) {
  80         if(delaySelection==null){
  81             delaySelection = new DelaySelection(part, selection);
  82         }
  83         delaySelection.setPart(part);
  84         delaySelection.setSelection(selection);
  85         if(!isInDelay){
  86             isInDelay = true;
  87             Display.getCurrent().asyncExec(delaySelection);
  88         }
  89     }
  90
  91     /*
  92      * (non-Javadoc)
  93      *
  94      * @see
  95      * eu.etaxonomy.taxeditor.model.AbstractCdmViewPart#createPartControl(org
  96      * .eclipse.swt.widgets.Composite)
  97      */
  98     /** {@inheritDoc} */
  99     @Override
 100     public void createPartControl(Composite parent) {
 101         super.createPartControl(parent);
 102     }
 103
 104     /**
 105      * <p>
 106      * getEditor
 107      * </p>
 108      *
 109      * @return the currently active editor
 110      */
 111     public IEditorPart getEditor() {
 112         return AbstractUtility.getActiveEditor();
 113     }
 114
 115     /** {@inheritDoc} */
 116     @Override
 117     public void setFocus() {
 118         super.setFocus();
 119
 120         if(getEditor() != null && ISecuredEditor.class.isAssignableFrom(getEditor().getClass())){
 121             boolean doEnable = ((ISecuredEditor)getEditor()).permissionsSatisfied();
 122             setEnabled(doEnable);
 123         }
 124     }
 125
 126     /** {@inheritDoc} */
 127     @Override
 128     public void changed(Object object) {
 129         if (part instanceof AbstractCdmViewPart) {
 130             ((AbstractCdmViewPart) part).changed(object);
 131         } else {
 132             IEditorPart editor = getEditor();
 133             if (editor != null && editor instanceof IDirtyMarkableSelectionProvider) {
 134                 ((IDirtyMarkableSelectionProvider) editor).changed(object);
 135             }
 136         }
 137     }
 138
 139 }