FileChooserEntryPoint.java

/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.gwt.widgets.client.filechooser;

import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;

import org.pentaho.gwt.widgets.client.filechooser.FileChooser.FileChooserMode;
import org.pentaho.gwt.widgets.client.utils.i18n.IResourceBundleLoadCallback;
import org.pentaho.gwt.widgets.client.utils.i18n.ResourceBundle;

public class FileChooserEntryPoint implements EntryPoint, IResourceBundleLoadCallback {

  public static ResourceBundle messages = new ResourceBundle();

  public void onModuleLoad() {
    if ( messages == null ) {
      messages = new ResourceBundle();
    }
    messages
        .loadBundle( GWT.getModuleBaseURL() + "messages/", "filechooser_messages", true, FileChooserEntryPoint.this );
  }

  public void bundleLoaded( String bundleName ) {
    setupNativeHooks( this );
  }

  public native void notifyCallback( JavaScriptObject callback, RepositoryFile file, String filePath, String fileName,
      String title )
  /*-{
   try {
     callback.fileSelected(file, filePath, fileName, title);
   } catch (ex) {
   }
  }-*/;

  public native void notifyCallbackCanceled( JavaScriptObject callback )
  /*-{
   try {
     callback.dialogCanceled();
   } catch (ex) {
     alert(ex);
   }
  }-*/;

  public void openFileChooserDialog( final JavaScriptObject callback, String selectedPath ) {
    FileChooserDialog dialog = new FileChooserDialog( FileChooserMode.OPEN, selectedPath, false, true );
    dialog.addFileChooserListener( new FileChooserListener() {
      public void fileSelected( RepositoryFile file, String filePath, String fileName, String title ) {
        notifyCallback( callback, file, filePath, fileName, title );
      }

      public void fileSelectionChanged( RepositoryFile file, String filePath, String fileName, String title ) {
      }

      public void dialogCanceled() {
        notifyCallbackCanceled( callback );
      }
    } );
  }
  
  public void openFolderChooserDialog( final JavaScriptObject callback, String selectedPath ) {
    FileChooserDialog dialog = new FileChooserDialog( FileChooserMode.OPEN, selectedPath, false, true );
    dialog.addFileChooserListener( new FileChooserListener() {
      public void fileSelected( RepositoryFile file, String filePath, String fileName, String title ) {
        notifyCallback( callback, file, filePath, fileName, title );
      }

      public void fileSelectionChanged( RepositoryFile file, String filePath, String fileName, String title ) {
      }

      public void dialogCanceled() {
        notifyCallbackCanceled( callback );
      }
    } );
    dialog.setFileFilter( new FileFilter() {
      
      @Override
      public boolean accept( String name, boolean isDirectory, boolean isVisible ) {
        return isDirectory;
      }
    } );
  }

  public void saveFileChooserDialog( final JavaScriptObject callback, String selectedPath ) {
    FileChooserDialog dialog = new FileChooserDialog( FileChooserMode.SAVE, selectedPath, false, true );
    addFileChooserListener(dialog, callback);
  }
  
  public void saveAsFileChooserDialog( final JavaScriptObject callback, String selectedPath ) {
    FileChooserDialog dialog = new FileChooserDialog( FileChooserMode.SAVE, selectedPath, false, true, 
        messages.getString( "SaveAs" ), messages.getString( "Save" ) );
    addFileChooserListener(dialog, callback);
  }
  
  private void addFileChooserListener(FileChooserDialog dialog, final JavaScriptObject callback) {
    dialog.addFileChooserListener( new FileChooserListener() {
      public void fileSelected( RepositoryFile file, String filePath, String fileName, String title ) {
        notifyCallback( callback, file, filePath, fileName, title );
      }

      public void fileSelectionChanged( RepositoryFile file, String filePath, String fileName, String title ) {
      }

      public void dialogCanceled() {
        notifyCallbackCanceled( callback );
      }
    } );
  }

  public native void setupNativeHooks( FileChooserEntryPoint fileChooserEntryPoint )
  /*-{
    $wnd.openFileChooserDialog = function(callback, selectedPath) {
      fileChooserEntryPoint.@org.pentaho.gwt.widgets.client.filechooser.FileChooserEntryPoint::openFileChooserDialog(Lcom/google/gwt/core/client/JavaScriptObject;Ljava/lang/String;)(callback, selectedPath);
    }
    $wnd.openFolderChooserDialog = function(callback, selectedPath) {
      fileChooserEntryPoint.@org.pentaho.gwt.widgets.client.filechooser.FileChooserEntryPoint::openFolderChooserDialog(Lcom/google/gwt/core/client/JavaScriptObject;Ljava/lang/String;)(callback, selectedPath);
    }
    $wnd.saveFileChooserDialog = function(callback, selectedPath) {
      fileChooserEntryPoint.@org.pentaho.gwt.widgets.client.filechooser.FileChooserEntryPoint::saveFileChooserDialog(Lcom/google/gwt/core/client/JavaScriptObject;Ljava/lang/String;)(callback, selectedPath);
    }
    $wnd.saveAsFileChooserDialog = function(callback, selectedPath) {
      fileChooserEntryPoint.@org.pentaho.gwt.widgets.client.filechooser.FileChooserEntryPoint::saveAsFileChooserDialog(Lcom/google/gwt/core/client/JavaScriptObject;Ljava/lang/String;)(callback, selectedPath);
    }
  }-*/;

}