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

   1 /*\r
   2  * Copyright 2007, 2008, 2009 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.RestException;\r
  23 import gr.ebs.gss.client.rest.resource.QuotaHolder;\r
  24 import gr.ebs.gss.client.rest.resource.UserResource;\r
  25 \r
  26 import com.google.gwt.core.client.GWT;\r
  27 import com.google.gwt.user.client.DeferredCommand;\r
  28 import com.google.gwt.user.client.IncrementalCommand;\r
  29 import com.google.gwt.user.client.ui.AbstractImagePrototype;\r
  30 import com.google.gwt.user.client.ui.Composite;\r
  31 import com.google.gwt.user.client.ui.HTML;\r
  32 import com.google.gwt.user.client.ui.HasHorizontalAlignment;\r
  33 import com.google.gwt.user.client.ui.HorizontalPanel;\r
  34 import com.google.gwt.user.client.ui.ImageBundle;\r
  35 \r
  36 /**\r
  37  * The panel that displays a status bar with quota information.\r
  38  */\r
  39 public class StatusPanel extends Composite {\r
  40         public static final boolean DONE = false;\r
  41         private HTML fileCountLabel;\r
  42         private HTML fileSizeLabel;\r
  43         private HTML quotaLabel;\r
  44         private HTML currentlyShowingLabel;\r
  45 \r
  46         /**\r
  47          * An image bundle for this widget's images.\r
  48          */\r
  49         public interface Images extends ImageBundle {\r
  50 \r
  51                 @Resource("gr/ebs/gss/resources/windowlist.png")\r
  52                 AbstractImagePrototype totalFiles();\r
  53 \r
  54                 @Resource("gr/ebs/gss/resources/database.png")\r
  55                 AbstractImagePrototype totalSize();\r
  56 \r
  57                 @Resource("gr/ebs/gss/resources/redled.png")\r
  58                 AbstractImagePrototype freeSize();\r
  59 \r
  60                 @Resource("gr/ebs/gss/resources/greenled.png")\r
  61                 AbstractImagePrototype greenSize();\r
  62 \r
  63                 @Resource("gr/ebs/gss/resources/yellowled.png")\r
  64                 AbstractImagePrototype yellowSize();\r
  65         }\r
  66 \r
  67         private final Images images;\r
  68 \r
  69         /**\r
  70          * The constructor of the status panel.\r
  71          *\r
  72          * @param theImages the supplied images\r
  73          */\r
  74         public StatusPanel(Images theImages) {\r
  75                 images = theImages;\r
  76                 HorizontalPanel outer = new HorizontalPanel();\r
  77                 outer.setWidth("100%");\r
  78                 outer.setHorizontalAlignment(HasHorizontalAlignment.ALIGN_LEFT);\r
  79 \r
  80                 HorizontalPanel left = new HorizontalPanel();\r
  81                 left.setSpacing(8);\r
  82                 HorizontalPanel right = new HorizontalPanel();\r
  83                 right.setSpacing(8);\r
  84                 outer.add(left);\r
  85                 outer.add(right);\r
  86                 left.add(new HTML("<b>Totals:</b> "));\r
  87                 left.add(images.totalFiles().createImage());\r
  88                 left.add(fileCountLabel = new HTML(""));\r
  89                 left.add(images.totalSize().createImage());\r
  90                 left.add(fileSizeLabel = new HTML(""));\r
  91                 left.add(quotaLabel = new HTML(""));\r
  92                 right.add(currentlyShowingLabel = new HTML(""));\r
  93                 outer.setStyleName("statusbar-inner");\r
  94                 left.setStyleName("statusbar-inner");\r
  95                 right.setStyleName("statusbar-inner");\r
  96                 outer.setCellHorizontalAlignment(right, HasHorizontalAlignment.ALIGN_RIGHT);\r
  97 \r
  98                 initWidget(outer);\r
  99 \r
 100                 // Initialize and display the quota information.\r
 101                 DeferredCommand.addCommand(new IncrementalCommand() {\r
 102                         public boolean execute() {\r
 103                                 GSS app = GSS.get();\r
 104                                 UserResource user = app.getCurrentUserResource();\r
 105                                 if (user == null || app.getFolders().getRootItem() == null)\r
 106                                         return !DONE;\r
 107                                 displayStats(user.getQuota());\r
 108                                 return DONE;\r
 109                         }\r
 110                 });\r
 111         }\r
 112 \r
 113         /**\r
 114          * Refresh the widget with the provided statistics.\r
 115          */\r
 116         private void displayStats(QuotaHolder stats) {\r
 117                 if (stats.getFileCount() == 1)\r
 118                         fileCountLabel.setHTML("1 file");\r
 119                 else\r
 120                         fileCountLabel.setHTML(stats.getFileCount() + " files");\r
 121                 fileSizeLabel.setHTML(stats.getFileSizeAsString() + " used");\r
 122                 long pc = stats.percentOfFreeSpace();\r
 123                 if(pc<10)\r
 124                         quotaLabel.setHTML(images.freeSize().getHTML()+"&nbsp;"+stats.getQuotaLeftAsString() +" free");\r
 125                 else if(pc<20)\r
 126                         quotaLabel.setHTML(images.yellowSize().getHTML()+"&nbsp;"+stats.getQuotaLeftAsString() +" free");\r
 127                 else\r
 128                         quotaLabel.setHTML(images.greenSize().getHTML()+"&nbsp;"+stats.getQuotaLeftAsString() +" free");\r
 129         }\r
 130 \r
 131         /**\r
 132          * Requests updated quota information from the server and refreshes\r
 133          * the display.\r
 134          */\r
 135         public void updateStats() {\r
 136                 final GSS app = GSS.get();\r
 137                 UserResource user = app.getCurrentUserResource();\r
 138                 GetCommand<UserResource> uc = new GetCommand<UserResource>(UserResource.class, user.getUri()){\r
 139                         @Override\r
 140                         public void onComplete() {\r
 141                                 displayStats(getResult().getQuota());\r
 142                         }\r
 143 \r
 144                         @Override\r
 145                         public void onError(Throwable t) {\r
 146                                 if(t instanceof RestException)\r
 147                                         app.displayError("Unable to fetch quota:"+((RestException)t).getHttpStatusText());\r
 148                                 else\r
 149                                         app.displayError("System error fetching quota:"+t.getMessage());\r
 150                                 GWT.log("ERR", t);\r
 151                         }\r
 152                 };\r
 153                 DeferredCommand.addCommand(uc);\r
 154         }\r
 155 \r
 156         /**\r
 157          * Displays the statistics for the current folder.\r
 158          *\r
 159          * @param text the statistics to display\r
 160          */\r
 161         public void updateCurrentlyShowing(String text) {\r
 162                 if (text == null)\r
 163                         currentlyShowingLabel.setText("");\r
 164                 else\r
 165                         currentlyShowingLabel.setHTML(" <b>Showing:</b> " + text);\r
 166         }\r
 167 \r
 168 }\r