libjava/classpath/gnu/java/awt/peer/gtk/GtkFileDialogPeer.java

   1 /* GtkFileDialogPeer.java -- Implements FileDialogPeer with GTK
   2    Copyright (C) 1998, 1999, 2002, 2004, 2005  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath 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 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package gnu.java.awt.peer.gtk;
  40
  41 import java.awt.Dialog;
  42 import java.awt.FileDialog;
  43 import java.awt.Graphics;
  44 import java.awt.peer.FileDialogPeer;
  45 import java.io.File;
  46 import java.io.FilenameFilter;
  47
  48 public class GtkFileDialogPeer extends GtkDialogPeer implements FileDialogPeer
  49 {
  50   static final String FS = System.getProperty("file.separator");
  51
  52   private String currentFile = null;
  53   private String currentDirectory = null;
  54   private FilenameFilter filter;
  55
  56   native void create (GtkContainerPeer parent, int mode);
  57   native void connectSignals ();
  58   native void nativeSetFile (String file);
  59   public native String nativeGetDirectory();
  60   public native void nativeSetDirectory(String directory);
  61   native void nativeSetFilenameFilter (FilenameFilter filter);
  62
  63   public void create()
  64   {
  65     create((GtkContainerPeer) awtComponent.getParent().getPeer(),
  66            ((FileDialog) awtComponent).getMode());
  67
  68     FileDialog fd = (FileDialog) awtComponent;
  69
  70     nativeSetDirectory(System.getProperty("user.dir"));
  71     setDirectory(fd.getDirectory());
  72     setFile(fd.getFile());
  73
  74     FilenameFilter filter = fd.getFilenameFilter();
  75     if (filter != null)
  76       setFilenameFilter(filter);
  77   }
  78
  79   public GtkFileDialogPeer (FileDialog fd)
  80   {
  81     super (fd);
  82   }
  83
  84   void setComponentBounds ()
  85   {
  86     if (awtComponent.getHeight () == 0
  87         && awtComponent.getWidth () == 0)
  88       {
  89         int[] dims = new int[2];
  90         gtkWidgetGetPreferredDimensions (dims);
  91
  92         if (dims[0] != awtComponent.getWidth()
  93             || dims[1] != awtComponent.getHeight())
  94           awtComponent.setSize(dims[0], dims[1]);
  95       }
  96     super.setComponentBounds ();
  97   }
  98
  99   public void setFile (String fileName)
 100   {
 101     /* If nothing changed do nothing.  This usually happens because
 102        the only way we have to set the file name in FileDialog is by
 103        calling its SetFile which will call us back. */
 104     if ((fileName == null && currentFile == null)
 105         || (fileName != null && fileName.equals (currentFile)))
 106       return;
 107
 108     if (fileName == null || fileName.equals (""))
 109       {
 110         currentFile = "";
 111         nativeSetFile ("");
 112         return;
 113       }
 114
 115     // GtkFileChooser requires absolute filenames. If the given filename
 116     // is not absolute, let's construct it based on current directory.
 117     currentFile = fileName;
 118     if (fileName.indexOf(FS) == 0)
 119       nativeSetFile(fileName);
 120     else
 121       nativeSetFile(nativeGetDirectory() + FS + fileName);
 122   }
 123
 124   public void setDirectory (String directory)
 125   {
 126     /* If nothing changed so nothing.  This usually happens because
 127        the only way we have to set the directory in FileDialog is by
 128        calling its setDirectory which will call us back. */
 129     if ((directory == null && currentDirectory == null)
 130         || (directory != null && directory.equals(currentDirectory)))
 131       return;
 132
 133     if (directory == null || directory.equals(""))
 134       {
 135         currentDirectory = FS;
 136         nativeSetDirectory(FS);
 137         return;
 138       }
 139
 140     // GtkFileChooser requires absolute directory names. If the given directory
 141     // name is not absolute, construct it based on current directory if it is not
 142     // null. Otherwise, use FS.
 143     currentDirectory = directory;
 144     if (directory.indexOf(FS) == 0)
 145       nativeSetDirectory(directory);
 146     else
 147       nativeSetDirectory(nativeGetDirectory() + FS + directory);
 148   }
 149
 150   public void setFilenameFilter (FilenameFilter filter)
 151   {
 152     this.filter = filter;
 153     nativeSetFilenameFilter(filter);
 154   }
 155
 156   /* This method interacts with the native callback function of the
 157      same name.  The native function will extract the filename from the
 158      GtkFileFilterInfo object and send it to this method, which will
 159      in turn call the filter's accept() method and give back the return
 160      value. */
 161   // called back by native side: filename_filter_cb
 162   boolean filenameFilterCallback (String fullname) {
 163     String filename = fullname.substring(fullname.lastIndexOf(FS) + 1);
 164     String dirname = fullname.substring(0, fullname.lastIndexOf(FS));
 165     File dir = new File(dirname);
 166     return filter.accept(dir, filename);
 167   }
 168
 169   public Graphics getGraphics ()
 170   {
 171     // GtkFileDialog will repaint by itself
 172     return null;
 173   }
 174
 175   // called back by native side: handle_response_cb
 176   // only called from the GTK thread
 177   void gtkHideFileDialog ()
 178   {
 179     // hide calls back the peer's setVisible method, so locking is a
 180     // problem.
 181     ((Dialog) awtComponent).hide();
 182   }
 183
 184   // called back by native side: handle_response_cb
 185   void gtkDisposeFileDialog ()
 186   {
 187     ((Dialog) awtComponent).dispose();
 188   }
 189
 190   // Callback to set the file and directory values when the user is finished
 191   // with the dialog.
 192   // called back by native side: handle_response_cb
 193   void gtkSetFilename (String fileName)
 194   {
 195     FileDialog fd = (FileDialog) awtWidget;
 196     if (fileName == null)
 197       {
 198         currentFile = null;
 199         fd.setFile(null);
 200         return;
 201       }
 202
 203     int sepIndex = fileName.lastIndexOf (FS);
 204     if (sepIndex < 0)
 205       {
 206         /* This should never happen on Unix (all paths start with '/') */
 207         currentFile = fileName;
 208       }
 209     else
 210       {
 211         if (fileName.length() > (sepIndex + 1))
 212           {
 213             String fn = fileName.substring (sepIndex + 1);
 214             currentFile = fn;
 215           }
 216         else
 217           {
 218             currentFile = null;
 219           }
 220
 221         String dn = fileName.substring (0, sepIndex + 1);
 222         currentDirectory = dn;
 223         fd.setDirectory(dn);
 224       }
 225
 226     fd.setFile (currentFile);
 227   }
 228 }