code.grnet.gr Git - pithos/blob - web_client/src/gr/grnet/pithos/web/client/AbstractPropertiesDialog.java

   1 /*\r
   2  *  Copyright (c) 2011 Greek Research and Technology Network\r
   3  */\r
   4 package gr.grnet.pithos.web.client;\r
   5 \r
   6 import gr.grnet.pithos.web.client.rest.GetCommand;\r
   7 import gr.grnet.pithos.web.client.rest.resource.TagsResource;\r
   8 \r
   9 import java.util.List;\r
  10 \r
  11 import com.google.gwt.core.client.GWT;\r
  12 import com.google.gwt.dom.client.NativeEvent;\r
  13 import com.google.gwt.event.dom.client.ClickEvent;\r
  14 import com.google.gwt.event.dom.client.ClickHandler;\r
  15 import com.google.gwt.event.dom.client.KeyCodes;\r
  16 import com.google.gwt.user.client.DeferredCommand;\r
  17 import com.google.gwt.user.client.Event.NativePreviewEvent;\r
  18 import com.google.gwt.user.client.ui.Anchor;\r
  19 import com.google.gwt.user.client.ui.DialogBox;\r
  20 import com.google.gwt.user.client.ui.FlowPanel;\r
  21 import com.google.gwt.user.client.ui.Label;\r
  22 import com.google.gwt.user.client.ui.TabPanel;\r
  23 import com.google.gwt.user.client.ui.TextBox;\r
  24 \r
  25 /**\r
  26  * Abstract class, parent of all 'File properties' dialog boxes.\r
  27  *\r
  28  */\r
  29 public abstract class AbstractPropertiesDialog extends DialogBox {\r
  30 \r
  31         protected static final String MULTIPLE_VALUES_TEXT = "(Multiple values)";\r
  32 \r
  33         /**\r
  34          * Text box with the tags associated with the file\r
  35          */\r
  36         protected TextBox tags = new TextBox();\r
  37 \r
  38         protected String initialTagText;\r
  39 \r
  40         /**\r
  41          * A FlowPanel with all user tags\r
  42          */\r
  43         protected FlowPanel allTagsContent;\r
  44 \r
  45 \r
  46         protected TabPanel inner = null;\r
  47 \r
  48         /**\r
  49          * The widget's constructor.\r
  50          *\r
  51          */\r
  52         public AbstractPropertiesDialog() {\r
  53 \r
  54                 // Enable IE selection for the dialog (must disable it upon closing it)\r
  55                 GSS.enableIESelection();\r
  56 \r
  57                 setAnimationEnabled(true);\r
  58 \r
  59         }\r
  60         /**\r
  61          * Retrieves all user tags from the server and updates the FlowPanel\r
  62          *\r
  63          * @param userId\r
  64          */\r
  65         protected void updateTags() {\r
  66                 GetCommand<TagsResource> tc = new GetCommand<TagsResource>(TagsResource.class, GSS.get().getCurrentUserResource().getTagsPath(),null) {\r
  67 \r
  68                         @Override\r
  69                         public void onComplete() {\r
  70                                 allTagsContent.clear();\r
  71                                 TagsResource tagr = getResult();\r
  72                                 List<String> userTags = tagr.getTags();\r
  73                                 Anchor tag = null;\r
  74                                 for(String usrTag : userTags){\r
  75                                         tag = new Anchor(usrTag.toString(), false);\r
  76                                         tag.addStyleName("pithos-tag");\r
  77                                         allTagsContent.add(tag);\r
  78                                         Label separator = new Label(", ");\r
  79                                         separator.addStyleName("pithos-tag");\r
  80                                         allTagsContent.add(separator);\r
  81                                         tag.addClickHandler( new ClickHandler() {\r
  82 \r
  83                                                 @Override\r
  84                                                 public void onClick(ClickEvent event) {\r
  85                                                         String existing = tags.getText();\r
  86                                                         if (MULTIPLE_VALUES_TEXT.equals(existing)) existing = "";\r
  87                                                         String newTag = ((Anchor) event.getSource()).getText().trim();\r
  88                                                         // insert the new tag only if it is not in the list\r
  89                                                         // already\r
  90                                                         if (existing.indexOf(newTag) == -1 && !existing.trim().endsWith(newTag))\r
  91                                                                 tags.setText(existing.trim()\r
  92                                                                                         + (existing.length() > 0 ? ", " : "")\r
  93                                                                                         + newTag);\r
  94                                                 }\r
  95                                         });\r
  96                                 }\r
  97                         }\r
  98 \r
  99                         @Override\r
 100                         public void onError(Throwable t) {\r
 101                                 GWT.log("", t);\r
 102                                 GSS.get().displayError("Unable to fetch user tags");\r
 103                         }\r
 104                 };\r
 105                 DeferredCommand.addCommand(tc);\r
 106 \r
 107         }\r
 108 \r
 109         /**\r
 110          * Accepts any change and updates the file\r
 111          *\r
 112          */\r
 113         protected abstract void accept();\r
 114 \r
 115         @Override\r
 116         @SuppressWarnings("fallthrough")\r
 117         protected void onPreviewNativeEvent(NativePreviewEvent preview) {\r
 118             super.onPreviewNativeEvent(preview);\r
 119 \r
 120             NativeEvent evt = preview.getNativeEvent();\r
 121             if (evt.getType().equals("keydown"))\r
 122                         // Use the popup's key preview hooks to close the dialog when either\r
 123                           // enter or escape is pressed.\r
 124                           switch (evt.getKeyCode()) {\r
 125                             case KeyCodes.KEY_ENTER:\r
 126                                 accept();\r
 127                             case KeyCodes.KEY_ESCAPE:\r
 128                               closeDialog();\r
 129                               break;\r
 130                           }\r
 131           }\r
 132 \r
 133 \r
 134 \r
 135         public void selectTab(int _tab) {\r
 136                 inner.selectTab(_tab);\r
 137         }\r
 138 \r
 139 \r
 140         /**\r
 141          * Enables IE selection prevention and hides the dialog\r
 142          * (we disable the prevention on creation of the dialog)\r
 143          */\r
 144         public void closeDialog() {\r
 145                 GSS.preventIESelection();\r
 146                 hide();\r
 147         }\r
 148 \r
 149 }\r