code.grnet.gr Git - pithos/blob - web_client/src/gr/grnet/pithos/web/client/AboutDialog.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 com.google.gwt.core.client.GWT;\r
   7 import com.google.gwt.dom.client.NativeEvent;\r
   8 import com.google.gwt.event.dom.client.ClickEvent;\r
   9 import com.google.gwt.event.dom.client.ClickHandler;\r
  10 import com.google.gwt.event.dom.client.KeyCodes;\r
  11 import com.google.gwt.user.client.Event.NativePreviewEvent;\r
  12 import com.google.gwt.user.client.ui.Button;\r
  13 import com.google.gwt.user.client.ui.DialogBox;\r
  14 import com.google.gwt.user.client.ui.HTML;\r
  15 import com.google.gwt.user.client.ui.HasHorizontalAlignment;\r
  16 import com.google.gwt.user.client.ui.VerticalPanel;\r
  17 \r
  18 /**\r
  19  * The 'about' dialog box.\r
  20  */\r
  21 public class AboutDialog extends DialogBox {\r
  22 \r
  23         /**\r
  24          * The widget constructor.\r
  25          */\r
  26         public AboutDialog() {\r
  27                 // Set the dialog's caption.\r
  28                 Configuration conf = (Configuration) GWT.create(Configuration.class);\r
  29                 String service = conf.serviceName();\r
  30                 setText("About " + service);\r
  31                 setAnimationEnabled(true);\r
  32                 // A VerticalPanel that contains the 'about' label and the 'OK' button.\r
  33                 final VerticalPanel outer = new VerticalPanel();\r
  34 \r
  35                 // Create the 'about' text and set the style.\r
  36                 final HTML text = new HTML("This is the Web client for the " + service +\r
  37                                         " service. You can use it to store, retrieve and share " +\r
  38                                         "files in the " + service + " server grid. <p>Pithos version: " +\r
  39                                         conf.version() + "<br> Service designed and implemented by " + "<a href='http://www.grnet.gr'>GRNET</a></p>");\r
  40                 text.setStyleName("pithos-AboutText");\r
  41                 outer.add(text);\r
  42 \r
  43                 // Create the 'OK' button, along with a listener that hides the dialog\r
  44                 // when the button is clicked.\r
  45                 final Button confirm = new Button("Close", new ClickHandler() {\r
  46 \r
  47                         @Override\r
  48                         public void onClick(ClickEvent event) {\r
  49                                 hide();\r
  50                         }\r
  51                 });\r
  52                 outer.add(confirm);\r
  53                 outer.setCellHorizontalAlignment(confirm, HasHorizontalAlignment.ALIGN_CENTER);\r
  54                 outer.setSpacing(8);\r
  55                 setWidget(outer);\r
  56         }\r
  57 \r
  58         @Override\r
  59         protected void onPreviewNativeEvent(NativePreviewEvent preview) {\r
  60                 super.onPreviewNativeEvent(preview);\r
  61                 NativeEvent evt = preview.getNativeEvent();\r
  62                 if (evt.getType().equals("keydown"))\r
  63                         // Use the popup's key preview hooks to close the dialog when\r
  64                         // either enter or escape is pressed.\r
  65                         switch (evt.getKeyCode()) {\r
  66                                 case KeyCodes.KEY_ENTER:\r
  67                                 case KeyCodes.KEY_ESCAPE:\r
  68                                         hide();\r
  69                                         break;\r
  70                         }\r
  71         }\r
  72 \r
  73 }\r