src/main/java/eu/etaxonomy/cdm/vaadin/util/CdmVaadinUtilities.java

   1 /**
   2  * Copyright (C) 2015 EDIT
   3  * European Distributed Institute of Taxonomy
   4  * http://www.e-taxonomy.eu
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version 1.1
   7  * See LICENSE.TXT at the top of this package for the full license terms.
   8  */
   9 package eu.etaxonomy.cdm.vaadin.util;
  10
  11 import java.util.Iterator;
  12 import java.util.List;
  13 import java.util.Set;
  14
  15 import com.vaadin.ui.AbstractSelect;
  16 import com.vaadin.ui.Component;
  17 import com.vaadin.ui.HasComponents;
  18 import com.vaadin.ui.UI;
  19
  20 import eu.etaxonomy.cdm.vaadin.component.CdmProgressComponent;
  21
  22 /**
  23  * @author cmathew
  24  * @since 7 Apr 2015
  25  *
  26  */
  27 public class CdmVaadinUtilities {
  28
  29     /**
  30      * Thread safe method to asynchronously perform an update.
  31      *
  32      * @param update
  33      */
  34     public static void asyncExec(Runnable update) {
  35         UI currentUI = UI.getCurrent();
  36         Thread t = new Thread(update);
  37         if(currentUI != null) {
  38             synchronized(currentUI) {
  39                 t.start();
  40             }
  41         } else {
  42             throw new UnsupportedOperationException("Cannot execute update on a UI which is null");
  43         }
  44     }
  45
  46     public static void exec(CdmVaadinOperation op) {
  47         if(op.isAsync()) {
  48             asyncExec(op);
  49         } else {
  50             op.run();
  51         }
  52     }
  53
  54
  55     public static void setEnabled(Component root, boolean isEnabled, List<? extends Component> exceptions) {
  56         if(exceptions != null && exceptions.contains(root)) {
  57             return;
  58         }
  59         if(root instanceof HasComponents) {
  60             HasComponents hc = (HasComponents) root;
  61             Iterator<Component> iterator = hc.iterator();
  62             while(iterator.hasNext()) {
  63                 setEnabled(iterator.next(), isEnabled, exceptions);
  64             }
  65         } else {
  66             root.setEnabled(isEnabled);
  67         }
  68     }
  69
  70     public static void enableOnlyProgressBar(Component component) {
  71         if(component instanceof CdmProgressComponent) {
  72             component.setEnabled(true);
  73             return;
  74         }
  75         if(component instanceof HasComponents) {
  76             HasComponents hc = (HasComponents) component;
  77             Iterator<Component> iterator = hc.iterator();
  78             while(iterator.hasNext()) {
  79                 enableOnlyProgressBar(iterator.next());
  80             }
  81         } else {
  82             component.setEnabled(false);
  83         }
  84     }
  85
  86     public static boolean isSelected(AbstractSelect select, Object itemId) {
  87         if(select.getValue() != null) {
  88             if(select.isMultiSelect()) {
  89                 Set<Object> selectedItemIds = (Set<Object>)select.getValue();
  90                 for(Object selectedItemId : selectedItemIds) {
  91                     if(selectedItemId.equals(itemId)) {
  92                         return true;
  93                     }
  94                 }
  95             } else {
  96                 return (select.getValue().equals(itemId));
  97             }
  98         }
  99         return false;
 100     }
 101
 102
 103 }