com.agynamix.platform.frontend.preferences.ApplicationChooserFieldEditor.java Source code

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Here is the source code for com.agynamix.platform.frontend.preferences.ApplicationChooserFieldEditor.java

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package com.agynamix.platform.frontend.preferences;

/*******************************************************************************
 * Copyright (c) 2000, 2007 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
 *******************************************************************************/

import java.io.File;

import org.eclipse.jface.preference.FileFieldEditor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.FileDialog;

import com.agynamix.platform.infra.PlatformUtils;
import com.agynamix.simidude.infra.SimidudeUtils;

public class ApplicationChooserFieldEditor extends FileFieldEditor {

    /**
     * Indicates whether the path must be absolute;
     * <code>false</code> by default.
     */
    private boolean enforceAbsolute = false;

    /**
     * Creates a new file field editor
     */
    protected ApplicationChooserFieldEditor() {
    }

    /**
     * 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 ApplicationChooserFieldEditor(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 ApplicationChooserFieldEditor(String name, String labelText, boolean enforceAbsolute, Composite parent) {
        this(name, labelText, enforceAbsolute, FileFieldEditor.VALIDATE_ON_FOCUS_LOST, 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 validationStrategy
     *          either {@link StringButtonFieldEditor#VALIDATE_ON_KEY_STROKE} to perform on the fly checking, or
     *          {@link StringButtonFieldEditor#VALIDATE_ON_FOCUS_LOST} (the default) to perform validation only after the
     *          text has been typed in
     * @param parent
     *          the parent of the field editor's control.
     * @since 3.4
     * @see StringButtonFieldEditor#VALIDATE_ON_KEY_STROKE
     * @see StringButtonFieldEditor#VALIDATE_ON_FOCUS_LOST
     */
    public ApplicationChooserFieldEditor(String name, String labelText, boolean enforceAbsolute,
            int validationStrategy, Composite parent) {
        super(name, labelText, enforceAbsolute, validationStrategy, parent);
        this.enforceAbsolute = enforceAbsolute;
        init(name, labelText);
    }

    /*
     * (non-Javadoc) Method declared on StringFieldEditor. Checks whether the text input field specifies an existing file.
     */
    protected boolean checkState() {

        String msg = null;

        String path = getTextControl().getText();
        if (path != null) {
            path = path.trim();
        } else {
            path = "";//$NON-NLS-1$
        }
        if (path.length() == 0) {
            if (!isEmptyStringAllowed()) {
                msg = getErrorMessage();
            }
        } else {
            File file = new File(path);
            if ((file.isFile()) || ((PlatformUtils.isMacOs()) && (file.isDirectory()))) {
                if (enforceAbsolute && !file.isAbsolute()) {
                    msg = JFaceResources.getString("FileFieldEditor.errorMessage2");//$NON-NLS-1$
                }
            } else {
                if (SimidudeUtils.findProgram(path) == null) {
                    msg = getErrorMessage();
                }
            }
        }

        if (msg != null) { // error
            showErrorMessage(msg);
            return false;
        }

        // OK!
        clearErrorMessage();
        return true;
    }

}