archive/net.sourceforge.phpeclipse.news/src/net/sourceforge/phpeclipse/news/view/NewsTreeViewerProvider.java

   1 /*
   2  * Created on 16 mai 2004
   3  * Copyright 2004 Jérôme Nègre
   4  */
   5 package net.sourceforge.phpeclipse.news.view;
   6
   7 import net.sourceforge.phpeclipse.news.Channel;
   8 import net.sourceforge.phpeclipse.news.IconManager;
   9 import net.sourceforge.phpeclipse.news.Item;
  10 import net.sourceforge.phpeclipse.news.Plugin;
  11
  12 import org.eclipse.jface.viewers.ILabelProvider;
  13 import org.eclipse.jface.viewers.ILabelProviderListener;
  14 import org.eclipse.jface.viewers.ITreeContentProvider;
  15 import org.eclipse.jface.viewers.Viewer;
  16 import org.eclipse.swt.graphics.Image;
  17
  18 /**
  19  * @author Jérôme Nègre
  20  */
  21 public class NewsTreeViewerProvider
  22                 implements
  23                         ITreeContentProvider,
  24                         ILabelProvider {
  25
  26         public Object[] getChildren(Object parentElement) {
  27                 if(parentElement instanceof Channel) {
  28                         return ((Channel)parentElement).getItems().toArray();
  29                 } else {
  30                         return null;
  31                 }
  32         }
  33
  34         /* (non-Javadoc)
  35          * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
  36          */
  37         public Object getParent(Object element) {
  38                 // TODO Auto-generated method stub
  39                 return null;
  40         }
  41
  42         public boolean hasChildren(Object element) {
  43                 if(element instanceof Channel) {
  44                         return !((Channel)element).getItems().isEmpty();
  45                 } else {
  46                         return false;
  47                 }
  48         }
  49
  50         public Object[] getElements(Object inputElement) {
  51                 return ((Plugin)inputElement).getChannelList().toArray();
  52         }
  53
  54         /* (non-Javadoc)
  55          * @see org.eclipse.jface.viewers.IContentProvider#dispose()
  56          */
  57         public void dispose() {
  58                 // TODO Auto-generated method stub
  59
  60         }
  61
  62         /* (non-Javadoc)
  63          * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
  64          */
  65         public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
  66                 // TODO Auto-generated method stub
  67         }
  68
  69         public Image getImage(Object element) {
  70
  71                 String iconId;
  72
  73                 if(element instanceof Channel) {
  74                         Channel channel = (Channel)element;
  75                         if(channel.isRefreshing()) {
  76                                 iconId = IconManager.ICON_STATUS_REFRESH;
  77                         } else if(channel.getErrorMessage()!=null) {
  78                                 iconId = IconManager.ICON_STATUS_ERROR;
  79                         } else if(channel.isUnread()) {
  80                                 iconId = IconManager.ICON_STATUS_UNREAD;
  81                         } else {
  82                                 iconId = IconManager.ICON_STATUS_READ;
  83                         }
  84                 } else if(element instanceof Item) {
  85                         Item item = (Item)element;
  86                         if(item.isReadFlag()) {
  87                                 iconId = IconManager.ICON_STATUS_READ;
  88                         } else {
  89                                 iconId = IconManager.ICON_STATUS_UNREAD;
  90                         }
  91                 } else {
  92                         return null;
  93                 }
  94                 return Plugin.getDefault().getImageRegistry().getDescriptor(iconId).createImage();
  95         }
  96
  97         public String getText(Object element) {
  98                 if(element instanceof Channel) {
  99                         return ((Channel)element).getTitle();
 100                 } else if(element instanceof Item) {
 101                         return ((Item)element).getUsableTitle();
 102                 } else {
 103                         return "Unexpected object: "+element;
 104                 }
 105         }
 106
 107         /* (non-Javadoc)
 108          * @see org.eclipse.jface.viewers.IBaseLabelProvider#addListener(org.eclipse.jface.viewers.ILabelProviderListener)
 109          */
 110         public void addListener(ILabelProviderListener listener) {
 111                 // TODO Auto-generated method stub
 112
 113         }
 114
 115         /* (non-Javadoc)
 116          * @see org.eclipse.jface.viewers.IBaseLabelProvider#isLabelProperty(java.lang.Object, java.lang.String)
 117          */
 118         public boolean isLabelProperty(Object element, String property) {
 119                 // TODO Auto-generated method stub
 120                 return false;
 121         }
 122
 123         /* (non-Javadoc)
 124          * @see org.eclipse.jface.viewers.IBaseLabelProvider#removeListener(org.eclipse.jface.viewers.ILabelProviderListener)
 125          */
 126         public void removeListener(ILabelProviderListener listener) {
 127                 // TODO Auto-generated method stub
 128
 129         }
 130 }