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

   1 /*
   2  * Copyright 2009 Electronic Business Systems Ltd.
   3  *
   4  * This file is part of GSS.
   5  *
   6  * GSS is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GSS is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with GSS.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19 package gr.ebs.gss.client;
  20
  21 import com.google.gwt.user.client.ui.Button;
  22 import com.google.gwt.user.client.ui.ClickListener;
  23 import com.google.gwt.user.client.ui.DialogBox;
  24 import com.google.gwt.user.client.ui.HTML;
  25 import com.google.gwt.user.client.ui.HasHorizontalAlignment;
  26 import com.google.gwt.user.client.ui.HorizontalPanel;
  27 import com.google.gwt.user.client.ui.KeyboardListener;
  28 import com.google.gwt.user.client.ui.VerticalPanel;
  29 import com.google.gwt.user.client.ui.Widget;
  30
  31
  32 /**
  33  * A dialog for requesting confirmation from the user.
  34  *
  35  * @author kman
  36  */
  37 public abstract class ConfirmationDialog extends DialogBox {
  38
  39         /**
  40          * The widget's constructor.
  41          *
  42          * @param message the message to display
  43          * @param buttonLabel the label of the confirmation button
  44          */
  45         public ConfirmationDialog(String message, String buttonLabel) {
  46                 // Set the dialog's caption.
  47                 setText("Confirmation");
  48                 setAnimationEnabled(true);
  49                 // Create a VerticalPanel to contain the label and the buttons.
  50                 VerticalPanel outer = new VerticalPanel();
  51                 HorizontalPanel buttons = new HorizontalPanel();
  52
  53                 HTML text = new HTML("<table><tr><td rowspan='2'>" + MessagePanel.images.warn().getHTML() +
  54                                         "</td><td>" + message + "</td></tr></table>");
  55                 text.setStyleName("gss-warnMessage");
  56                 outer.add(text);
  57
  58                 // Create the 'Update' button, along with a listener that hides the dialog
  59                 // when the button is clicked and renames the file.
  60                 Button ok = new Button(buttonLabel, new ClickListener() {
  61
  62                         public void onClick(Widget sender) {
  63                                 confirm();
  64                                 hide();
  65                         }
  66                 });
  67                 buttons.add(ok);
  68                 buttons.setCellHorizontalAlignment(ok, HasHorizontalAlignment.ALIGN_CENTER);
  69                 // Create the 'Cancel' button, along with a listener that hides the
  70                 // dialog when the button is clicked.
  71                 Button cancel = new Button("Cancel", new ClickListener() {
  72
  73                         public void onClick(Widget sender) {
  74                                 hide();
  75                                 cancel();
  76                         }
  77                 });
  78                 buttons.add(cancel);
  79                 buttons.setCellHorizontalAlignment(cancel, HasHorizontalAlignment.ALIGN_CENTER);
  80                 buttons.setSpacing(8);
  81                 buttons.setStyleName("gss-warnMessage");
  82                 outer.setStyleName("gss-warnMessage");
  83                 outer.add(buttons);
  84                 outer.setCellHorizontalAlignment(text, HasHorizontalAlignment.ALIGN_CENTER);
  85                 outer.setCellHorizontalAlignment(buttons, HasHorizontalAlignment.ALIGN_CENTER);
  86                 setWidget(outer);
  87         }
  88
  89         @Override
  90         public boolean onKeyDownPreview(final char key, final int modifiers) {
  91                 // Use the popup's key preview hooks to close the dialog when either
  92                 // enter or escape is pressed.
  93                 switch (key) {
  94                         case KeyboardListener.KEY_ENTER:
  95                                 hide();
  96                                 confirm();
  97                                 break;
  98                         case KeyboardListener.KEY_ESCAPE:
  99                                 hide();
 100                                 cancel();
 101                                 break;
 102                 }
 103                 return true;
 104         }
 105
 106         public abstract void confirm();
 107
 108         public abstract void cancel();
 109 }