GenericUploadControl.java

   1 /*
   2  * Copyright (C) 2007-2012 Mathieu Baudier
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *         http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package org.argeo.eclipse.ui.specific;
  17
  18 import java.io.File;
  19 import java.io.IOException;
  20
  21 import org.apache.commons.io.FileUtils;
  22 import org.argeo.ArgeoException;
  23 import org.eclipse.swt.SWT;
  24 import org.eclipse.swt.events.ModifyListener;
  25 import org.eclipse.swt.layout.GridData;
  26 import org.eclipse.swt.layout.GridLayout;
  27 import org.eclipse.swt.widgets.Button;
  28 import org.eclipse.swt.widgets.Composite;
  29 import org.eclipse.swt.widgets.Event;
  30 import org.eclipse.swt.widgets.FileDialog;
  31 import org.eclipse.swt.widgets.Listener;
  32 import org.eclipse.swt.widgets.Text;
  33
  34 /**
  35  * RCP specific composite that provides a control to upload a file. WARNING: for
  36  * the time being we set a GridLayout(2, false) on th eparent control.
  37  */
  38 public class GenericUploadControl extends Composite {
  39         // private final static Log log = LogFactory
  40         // .getLog(GenericUploadControl.class);
  41
  42         private FileDialog dialog;
  43         private Text filePath;
  44
  45         public GenericUploadControl(Composite parent, int style, String browseLabel) {
  46                 super(parent, style);
  47                 createControl(this, browseLabel);
  48
  49         }
  50
  51         private void createControl(final Composite parent, String browseLabel) {
  52                 parent.setLayout(new GridLayout(2, false));
  53
  54                 filePath = new Text(parent, SWT.BORDER | SWT.SINGLE);
  55                 GridData gd = new GridData(GridData.GRAB_HORIZONTAL
  56                                 | GridData.FILL_HORIZONTAL);
  57                 filePath.setEditable(false);
  58                 filePath.setLayoutData(gd);
  59
  60                 // Execute button
  61                 Button execute = new Button(parent, SWT.PUSH);
  62                 GridData gridData = new GridData();
  63                 gridData.horizontalAlignment = GridData.BEGINNING;
  64                 execute.setLayoutData(gridData);
  65                 execute.setText(browseLabel);
  66
  67                 // Button listener
  68                 Listener executeListener = new Listener() {
  69                         public void handleEvent(Event event) {
  70                                 dialog = new FileDialog(parent.getShell());
  71                                 filePath.setText(dialog.open());
  72                         }
  73                 };
  74                 parent.layout();
  75                 execute.addListener(SWT.Selection, executeListener);
  76         }
  77
  78         public boolean isControlEmpty() {
  79                 String path = filePath.getText();
  80                 if (path == null || "".equals(path.trim()))
  81                         return true;
  82                 else
  83                         return false;
  84         }
  85
  86         public byte[] performUpload() {
  87                 String path = filePath.getText();
  88                 if (path != null) {
  89                         try {
  90                                 File file = new File(path);
  91                                 byte[] fileBA = FileUtils.readFileToByteArray(file);
  92                                 return fileBA;
  93                         } catch (IOException e) {
  94                                 throw new ArgeoException("Unexpected error while "
  95                                                 + "reading file at path " + path, e);
  96                         }
  97                 }
  98                 return null;
  99         }
 100
 101         public void addModifyListener(ModifyListener listener) {
 102                 filePath.addModifyListener(listener);
 103         }
 104
 105         /**
 106          * Always returns null in an RCP environment
 107          */
 108         public String getLastFileUploadedName() {
 109                 return null;
 110         }
 111 }