com.google.gdt.eclipse.designer.gxt.model.property.MarginsPropertyEditor.java Source code

Introduction

Here is the source code for com.google.gdt.eclipse.designer.gxt.model.property.MarginsPropertyEditor.java

Source

/*******************************************************************************
 * Copyright 2011 Google Inc. All Rights Reserved.
 *
 * 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
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *******************************************************************************/
package com.google.gdt.eclipse.designer.gxt.model.property;

import org.eclipse.wb.internal.core.model.property.Property;
import org.eclipse.wb.internal.core.model.property.editor.PropertyEditor;
import org.eclipse.wb.internal.core.model.property.editor.TextDialogPropertyEditor;
import org.eclipse.wb.internal.core.model.property.editor.geometry.AbstractGeometryDialog;

import org.eclipse.jface.dialogs.IDialogConstants;

/**
 * Implementation of {@link PropertyEditor} for <code>Margins</code>.
 * 
 * @author scheglov_ke
 * @coverage ExtGWT.model.property
 */
public final class MarginsPropertyEditor extends TextDialogPropertyEditor {
    ////////////////////////////////////////////////////////////////////////////
    //
    // Instance
    //
    ////////////////////////////////////////////////////////////////////////////
    public static final PropertyEditor INSTANCE = new MarginsPropertyEditor();

    private MarginsPropertyEditor() {
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Presentation
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    protected String getText(Property property) throws Exception {
        Object value = property.getValue();
        if (Margins.isMargins(value)) {
            Margins margins = new Margins(value);
            return "(" + margins.top + ", " + margins.right + ", " + margins.bottom + ", " + margins.left + ")";
        }
        // unknown value
        return null;
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // Editing
    //
    ////////////////////////////////////////////////////////////////////////////
    @Override
    protected void openDialog(Property property) throws Exception {
        // prepare Margins to edit
        Margins margins;
        {
            Object value = property.getValue();
            if (Margins.isMargins(value)) {
                margins = new Margins(value);
            } else {
                margins = new Margins();
            }
        }
        // prepare dialog
        MarginsDialog dialog = new MarginsDialog(property.getTitle(), margins);
        // open dialog
        int result = dialog.open();
        if (result == IDialogConstants.IGNORE_ID) {
            property.setValue(Property.UNKNOWN_VALUE);
        } else if (result == IDialogConstants.OK_ID) {
            property.setValue(margins);
        }
    }

    ////////////////////////////////////////////////////////////////////////////
    //
    // MarginsDialog
    //
    ////////////////////////////////////////////////////////////////////////////
    private static final class MarginsDialog extends AbstractGeometryDialog {
        ////////////////////////////////////////////////////////////////////////////
        //
        // Constructor
        //
        ////////////////////////////////////////////////////////////////////////////
        public MarginsDialog(String title, Object margins) {
            super(title, margins);
        }

        ////////////////////////////////////////////////////////////////////////////
        //
        // GUI
        //
        ////////////////////////////////////////////////////////////////////////////
        @Override
        protected void createEditors() {
            createEditor("&Top:", "top");
            createEditor("&Right:", "right");
            createEditor("&Bottom:", "bottom");
            createEditor("&Left:", "left");
        }
    }
}