Mercurial > projects > dwt-addons
view dwtx/jface/preference/FileFieldEditor.d @ 34:b3c8e32d406f
preference
author | Frank Benoit <benoit@tionex.de> |
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date | Sat, 05 Apr 2008 01:45:47 +0200 |
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children | ea8ff534f622 |
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/******************************************************************************* * Copyright (c) 2000, 2006 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module dwtx.jface.preference.FileFieldEditor; import dwtx.jface.preference.StringButtonFieldEditor; // import java.io.File; import dwt.DWT; import dwt.widgets.Composite; import dwt.widgets.FileDialog; import dwtx.jface.resource.JFaceResources; import dwt.dwthelper.utils; import tango.io.FilePath; import tango.io.FileSystem; /** * A field editor for a file path type preference. A standard file * dialog appears when the user presses the change button. */ public class FileFieldEditor : StringButtonFieldEditor { /** * List of legal file extension suffixes, or <code>null</code> * for system defaults. */ private String[] extensions = null; /** * Indicates whether the path must be absolute; * <code>false</code> by default. */ private bool enforceAbsolute = false; /** * Creates a new file field editor */ protected this() { } /** * Creates a file field editor. * * @param name the name of the preference this field editor works on * @param labelText the label text of the field editor * @param parent the parent of the field editor's control */ public this(String name, String labelText, Composite parent) { this(name, labelText, false, parent); } /** * Creates a file field editor. * * @param name the name of the preference this field editor works on * @param labelText the label text of the field editor * @param enforceAbsolute <code>true</code> if the file path * must be absolute, and <code>false</code> otherwise * @param parent the parent of the field editor's control */ public this(String name, String labelText, bool enforceAbsolute, Composite parent) { init(name, labelText); this.enforceAbsolute = enforceAbsolute; setErrorMessage(JFaceResources .getString("FileFieldEditor.errorMessage"));//$NON-NLS-1$ setChangeButtonText(JFaceResources.getString("openBrowse"));//$NON-NLS-1$ setValidateStrategy(VALIDATE_ON_FOCUS_LOST); createControl(parent); } /* (non-Javadoc) * Method declared on StringButtonFieldEditor. * Opens the file chooser dialog and returns the selected file. */ protected String changePressed() { auto f = new FilePath(getTextControl().getText()); if (!f.exists()) { f = cast(FilePath)null; } auto d = getFile(f); if (d is null) { return null; } return FileSystem.toAbsolute( d ).toString(); } /* (non-Javadoc) * Method declared on StringFieldEditor. * Checks whether the text input field specifies an existing file. */ protected bool checkState() { String msg = null; String path = getTextControl().getText(); if (path !is null) { path = path.trim(); } else { path = "";//$NON-NLS-1$ } if (path.length is 0) { if (!isEmptyStringAllowed()) { msg = getErrorMessage(); } } else { auto file = new FilePath(path); if (/+file.isFile()+/ file.exists && !file.isFolder ) { if (enforceAbsolute && !file.isAbsolute()) { msg = JFaceResources .getString("FileFieldEditor.errorMessage2");//$NON-NLS-1$ } } else { msg = getErrorMessage(); } } if (msg !is null) { // error showErrorMessage(msg); return false; } // OK! clearErrorMessage(); return true; } /** * Helper to open the file chooser dialog. * @param startingDirectory the directory to open the dialog on. * @return File The File the user selected or <code>null</code> if they * do not. */ private FilePath getFile(FilePath startingDirectory) { FileDialog dialog = new FileDialog(getShell(), DWT.OPEN); if (startingDirectory !is null) { dialog.setFileName(startingDirectory.path()); } if (extensions !is null) { dialog.setFilterExtensions(extensions); } String file = dialog.open(); if (file !is null) { file = file.trim(); if (file.length > 0) { return new FilePath(file); } } return null; } /** * Sets this file field editor's file extension filter. * * @param extensions a list of file extension, or <code>null</code> * to set the filter to the system's default value */ public void setFileExtensions(String[] extensions) { this.extensions = extensions; } }