code.grnet.gr Git - pithos/blob - src/gr/ebs/gss/client/AbstractPropertiesDialog.java

   1 /*\r
   2  * Copyright 2007, 2008, 2009, 2010 Electronic Business Systems Ltd.\r
   3  *\r
   4  * This file is part of GSS.\r
   5  *\r
   6  * GSS is free software: you can redistribute it and/or modify\r
   7  * it under the terms of the GNU General Public License as published by\r
   8  * the Free Software Foundation, either version 3 of the License, or\r
   9  * (at your option) any later version.\r
  10  *\r
  11  * GSS is distributed in the hope that it will be useful,\r
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14  * GNU General Public License for more details.\r
  15  *\r
  16  * You should have received a copy of the GNU General Public License\r
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.\r
  18  */\r
  19 package gr.ebs.gss.client;\r
  20 \r
  21 import gr.ebs.gss.client.rest.GetCommand;\r
  22 import gr.ebs.gss.client.rest.resource.TagsResource;\r
  23 \r
  24 import java.util.List;\r
  25 \r
  26 import com.google.gwt.core.client.GWT;\r
  27 import com.google.gwt.dom.client.NativeEvent;\r
  28 import com.google.gwt.event.dom.client.ClickEvent;\r
  29 import com.google.gwt.event.dom.client.ClickHandler;\r
  30 import com.google.gwt.event.dom.client.KeyCodes;\r
  31 import com.google.gwt.user.client.DeferredCommand;\r
  32 import com.google.gwt.user.client.Event.NativePreviewEvent;\r
  33 import com.google.gwt.user.client.ui.Anchor;\r
  34 import com.google.gwt.user.client.ui.DialogBox;\r
  35 import com.google.gwt.user.client.ui.FlowPanel;\r
  36 import com.google.gwt.user.client.ui.Label;\r
  37 import com.google.gwt.user.client.ui.TabPanel;\r
  38 import com.google.gwt.user.client.ui.TextBox;\r
  39 \r
  40 /**\r
  41  * Abstract class, parent of all 'File properties' dialog boxes.\r
  42  *\r
  43  * @author droutsis\r
  44  */\r
  45 public abstract class AbstractPropertiesDialog extends DialogBox {\r
  46 \r
  47         protected static final String MULTIPLE_VALUES_TEXT = "(Multiple values)";\r
  48 \r
  49         /**\r
  50          * Text box with the tags associated with the file\r
  51          */\r
  52         protected TextBox tags = new TextBox();\r
  53 \r
  54         protected String initialTagText;\r
  55 \r
  56         /**\r
  57          * A FlowPanel with all user tags\r
  58          */\r
  59         protected FlowPanel allTagsContent;\r
  60 \r
  61 \r
  62         protected TabPanel inner = null;\r
  63 \r
  64         /**\r
  65          * The widget's constructor.\r
  66          *\r
  67          */\r
  68         public AbstractPropertiesDialog() {\r
  69 \r
  70                 // Enable IE selection for the dialog (must disable it upon closing it)\r
  71                 GSS.enableIESelection();\r
  72 \r
  73                 setAnimationEnabled(true);\r
  74 \r
  75         }\r
  76         /**\r
  77          * Retrieves all user tags from the server and updates the FlowPanel\r
  78          *\r
  79          * @param userId\r
  80          */\r
  81         protected void updateTags() {\r
  82                 GetCommand<TagsResource> tc = new GetCommand<TagsResource>(TagsResource.class, GSS.get().getCurrentUserResource().getTagsPath(),null) {\r
  83 \r
  84                         @Override\r
  85                         public void onComplete() {\r
  86                                 allTagsContent.clear();\r
  87                                 TagsResource tagr = getResult();\r
  88                                 List<String> userTags = tagr.getTags();\r
  89                                 Anchor tag = null;\r
  90                                 for(String usrTag : userTags){\r
  91                                         tag = new Anchor(usrTag.toString(), false);\r
  92                                         tag.addStyleName("gss-tag");\r
  93                                         allTagsContent.add(tag);\r
  94                                         Label separator = new Label(", ");\r
  95                                         separator.addStyleName("gss-tag");\r
  96                                         allTagsContent.add(separator);\r
  97                                         tag.addClickHandler( new ClickHandler() {\r
  98 \r
  99                                                 @Override\r
 100                                                 public void onClick(ClickEvent event) {\r
 101                                                         String existing = tags.getText();\r
 102                                                         if (MULTIPLE_VALUES_TEXT.equals(existing)) existing = "";\r
 103                                                         String newTag = ((Anchor) event.getSource()).getText().trim();\r
 104                                                         // insert the new tag only if it is not in the list\r
 105                                                         // already\r
 106                                                         if (existing.indexOf(newTag) == -1 && !existing.trim().endsWith(newTag))\r
 107                                                                 tags.setText(existing.trim()\r
 108                                                                                         + (existing.length() > 0 ? ", " : "")\r
 109                                                                                         + newTag);\r
 110                                                 }\r
 111                                         });\r
 112                                 }\r
 113                         }\r
 114 \r
 115                         @Override\r
 116                         public void onError(Throwable t) {\r
 117                                 GWT.log("", t);\r
 118                                 GSS.get().displayError("Unable to fetch user tags");\r
 119                         }\r
 120                 };\r
 121                 DeferredCommand.addCommand(tc);\r
 122 \r
 123         }\r
 124 \r
 125         /**\r
 126          * Accepts any change and updates the file\r
 127          *\r
 128          */\r
 129         protected abstract void accept();\r
 130 \r
 131         @Override\r
 132         @SuppressWarnings("fallthrough")\r
 133         protected void onPreviewNativeEvent(NativePreviewEvent preview) {\r
 134             super.onPreviewNativeEvent(preview);\r
 135 \r
 136             NativeEvent evt = preview.getNativeEvent();\r
 137             if (evt.getType().equals("keydown"))\r
 138                         // Use the popup's key preview hooks to close the dialog when either\r
 139                           // enter or escape is pressed.\r
 140                           switch (evt.getKeyCode()) {\r
 141                             case KeyCodes.KEY_ENTER:\r
 142                                 accept();\r
 143                             case KeyCodes.KEY_ESCAPE:\r
 144                               closeDialog();\r
 145                               break;\r
 146                           }\r
 147           }\r
 148 \r
 149 \r
 150 \r
 151         public void selectTab(int _tab) {\r
 152                 inner.selectTab(_tab);\r
 153         }\r
 154 \r
 155 \r
 156         /**\r
 157          * Enables IE selection prevention and hides the dialog\r
 158          * (we disable the prevention on creation of the dialog)\r
 159          */\r
 160         public void closeDialog() {\r
 161                 GSS.preventIESelection();\r
 162                 hide();\r
 163         }\r
 164 \r
 165 }\r