libjava/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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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.Window;
  45 import java.awt.peer.FileDialogPeer;
  46 import java.io.File;
  47 import java.io.FilenameFilter;
  48
  49 public class GtkFileDialogPeer extends GtkDialogPeer implements FileDialogPeer
  50 {
  51   static final String FS = System.getProperty("file.separator");
  52
  53   private String currentFile = null;
  54   private String currentDirectory = null;
  55   private FilenameFilter filter;
  56
  57   native void create (GtkContainerPeer parent);
  58   native void connectSignals ();
  59   native void nativeSetFile (String file);
  60   public native String nativeGetDirectory();
  61   public native void nativeSetDirectory(String directory);
  62   native void nativeSetFilenameFilter (FilenameFilter filter);
  63
  64   public void create()
  65   {
  66     create((GtkContainerPeer) awtComponent.getParent().getPeer());
  67
  68     FileDialog fd = (FileDialog) awtComponent;
  69
  70     setDirectory(fd.getDirectory());
  71     setFile(fd.getFile());
  72
  73     FilenameFilter filter = fd.getFilenameFilter();
  74     if (filter != null)
  75       setFilenameFilter(filter);
  76   }
  77
  78   public GtkFileDialogPeer (FileDialog fd)
  79   {
  80     super (fd);
  81   }
  82
  83   void setComponentBounds ()
  84   {
  85     if (awtComponent.getHeight () == 0
  86         && awtComponent.getWidth () == 0)
  87       {
  88         int[] dims = new int[2];
  89         gtkWidgetGetPreferredDimensions (dims);
  90         ((GtkFileDialogPeer) this).setBoundsCallback ((Window) awtComponent,
  91                                                       awtComponent.getX (),
  92                                                       awtComponent.getY (),
  93                                                       dims[0], dims[1]);
  94       }
  95     super.setComponentBounds ();
  96   }
  97
  98   public void setFile (String fileName)
  99   {
 100     /* If nothing changed do nothing.  This usually happens because
 101        the only way we have to set the file name in FileDialog is by
 102        calling its SetFile which will call us back. */
 103     if ((fileName == null && currentFile == null)
 104         || (fileName != null && fileName.equals (currentFile)))
 105       return;
 106
 107     if (fileName == null || fileName.equals (""))
 108       {
 109         currentFile = "";
 110         nativeSetFile ("");
 111         return;
 112       }
 113
 114     // GtkFileChooser requires absolute filenames. If the given filename
 115     // is not absolute, let's construct it based on current directory.
 116     currentFile = fileName;
 117     if (fileName.indexOf(FS) == 0)
 118       {
 119         nativeSetFile (fileName);
 120       }
 121     else
 122       {
 123         nativeSetFile (nativeGetDirectory() + FS + fileName);
 124       }
 125   }
 126
 127   public void setDirectory (String directory)
 128   {
 129     /* If nothing changed so nothing.  This usually happens because
 130        the only way we have to set the directory in FileDialog is by
 131        calling its setDirectory which will call us back. */
 132     if ((directory == null && currentDirectory == null)
 133         || (directory != null && directory.equals (currentDirectory)))
 134       return;
 135
 136     if (directory == null || directory.equals (""))
 137       {
 138         currentDirectory = FS;
 139         nativeSetFile (FS);
 140         return;
 141       }
 142
 143     currentDirectory = directory;
 144     nativeSetDirectory (directory);
 145   }
 146
 147   public void setFilenameFilter (FilenameFilter filter)
 148   {
 149     this.filter = filter;
 150     nativeSetFilenameFilter(filter);
 151   }
 152
 153   /* This method interacts with the native callback function of the
 154      same name.  The native function will extract the filename from the
 155      GtkFileFilterInfo object and send it to this method, which will
 156      in turn call the filter's accept() method and give back the return
 157      value. */
 158   boolean filenameFilterCallback (String fullname) {
 159     String filename = fullname.substring(fullname.lastIndexOf(FS) + 1);
 160     String dirname = fullname.substring(0, fullname.lastIndexOf(FS));
 161     File dir = new File(dirname);
 162     return filter.accept(dir, filename);
 163   }
 164
 165   public Graphics getGraphics ()
 166   {
 167     // GtkFileDialog will repaint by itself
 168     return null;
 169   }
 170
 171   void gtkHideFileDialog ()
 172   {
 173     ((Dialog) awtComponent).hide();
 174   }
 175
 176   void gtkDisposeFileDialog ()
 177   {
 178     ((Dialog) awtComponent).dispose();
 179   }
 180
 181   /* Callback to set the file and directory values when the user is finished
 182    * with the dialog.
 183    */
 184   void gtkSetFilename (String fileName)
 185   {
 186     FileDialog fd = (FileDialog) awtWidget;
 187     if (fileName == null)
 188       {
 189         currentFile = null;
 190         fd.setFile(null);
 191         return;
 192       }
 193
 194     int sepIndex = fileName.lastIndexOf (FS);
 195     if (sepIndex < 0)
 196       {
 197         /* This should never happen on Unix (all paths start with '/') */
 198         currentFile = fileName;
 199       }
 200     else
 201       {
 202         if (fileName.length() > (sepIndex + 1))
 203           {
 204             String fn = fileName.substring (sepIndex + 1);
 205             currentFile = fn;
 206           }
 207         else
 208           {
 209             currentFile = null;
 210           }
 211
 212         String dn = fileName.substring (0, sepIndex + 1);
 213         currentDirectory = dn;
 214         fd.setDirectory(dn);
 215       }
 216
 217     fd.setFile (currentFile);
 218   }
 219 }