com.bdaum.zoom.ui.dialogs.ZInputDialog.java Source code

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Here is the source code for com.bdaum.zoom.ui.dialogs.ZInputDialog.java

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/*
 * This file is part of the ZoRa project: http://www.photozora.org.
 *
 * ZoRa is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * ZoRa 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with ZoRa; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 * (c) 2009 Berthold Daum  
 */

package com.bdaum.zoom.ui.dialogs;

import org.eclipse.jface.dialogs.IDialogConstants;
import org.eclipse.jface.dialogs.IInputValidator;
import org.eclipse.jface.dialogs.InputDialog;
import org.eclipse.swt.widgets.Shell;

import com.bdaum.zoom.core.Constants;
import com.bdaum.zoom.core.Core;
import com.bdaum.zoom.css.internal.CssActivator;
import com.bdaum.zoom.ui.internal.widgets.IInputAdvisor;

/**
 * This class adapts the Eclipse InputDialog
 *
 */
public class ZInputDialog extends InputDialog {

    /**
     * true if the catalog is read-only
     */
    protected boolean readonly;
    private final boolean alwaysEnabled;
    private final IInputAdvisor advisor;

    /**
     * Creates an input dialog with OK and Cancel buttons. Note that the dialog
     * will have no visual representation (no widgets) until it is told to open.
     * <p>
     * Note that the <code>open</code> method blocks for input dialogs.
     * </p>
     *
     * @param parentShell
     *            the parent shell, or <code>null</code> to create a top-level
     *            shell
     * @param dialogTitle
     *            the dialog title, or <code>null</code> if none
     * @param dialogMessage
     *            the dialog message, or <code>null</code> if none
     * @param initialValue
     *            the initial input value, or <code>null</code> if none
     *            (equivalent to the empty string)
     * @param validator
     *            an input validator, or <code>null</code> if none
     * @param alwaysEnabled
     *            - true if the OK button is always enabled by default, false if
     *            it only enabled for writable catalogs
     */

    public ZInputDialog(Shell parentShell, String dialogTitle, String dialogMessage, String initialValue,
            IInputValidator validator, boolean alwaysEnabled) {
        this(parentShell, dialogTitle, dialogMessage, initialValue, null, validator, alwaysEnabled);
    }

    /**
     * Creates an input dialog with OK and Cancel buttons. Note that the dialog
     * will have no visual representation (no widgets) until it is told to open.
     * <p>
     * Note that the <code>open</code> method blocks for input dialogs.
     * </p>
     *
     * @param parentShell
     *            the parent shell, or <code>null</code> to create a top-level
     *            shell
     * @param dialogTitle
     *            the dialog title, or <code>null</code> if none
     * @param dialogMessage
     *            the dialog message, or <code>null</code> if none
     * @param initialValue
     *            the initial input value, or <code>null</code> if none
     *            (equivalent to the empty string)
     * @param advisor
     *            in input adviosr, or <code>null</code> if none
     * @param validator
     *            an input validator, or <code>null</code> if none
     * @param alwaysEnabled
     *            - true if the OK button is always enabled by default, false if
     *            it only enabled for writable catalogs
     */
    public ZInputDialog(Shell parentShell, String dialogTitle, String dialogMessage, String initialValue,
            IInputAdvisor advisor, IInputValidator validator, boolean alwaysEnabled) {
        super(parentShell, dialogTitle, dialogMessage, initialValue, validator);
        this.advisor = advisor;
        this.alwaysEnabled = alwaysEnabled;
        readonly = Core.getCore().getDbManager().isReadOnly();
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.jface.dialogs.Dialog#create()
     */
    @Override
    public void create() {
        super.create();
        getShell().setText(Constants.APPLICATION_NAME);
        CssActivator.getDefault().setColors(getShell());
        updateButtons();
    }

    private void updateButtons() {
        boolean enabled = alwaysEnabled || !readonly;
        getShell().setModified(enabled);
        getButton(IDialogConstants.OK_ID).setEnabled(enabled);
    }

    /*
     * (non-Javadoc)
     *
     * @see org.eclipse.jface.dialogs.InputDialog#validateInput()
     */
    @Override
    protected void validateInput() {
        String errorMessage = null;
        String text = getText().getText();
        if (getValidator() != null)
            errorMessage = getValidator().isValid(text);
        setErrorMessage(errorMessage);
        if (errorMessage == null) {
            setErrorMessage((advisor != null) ? advisor.getAdvice(text) : null);
            getShell().setModified(true);
            getButton(IDialogConstants.OK_ID).setEnabled(true);
        }
    }

}