mr.davidsanderson.uml.client.impl.EditorPanelImpl.java Source code

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Here is the source code for mr.davidsanderson.uml.client.impl.EditorPanelImpl.java

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/**
 * Copyright 2009 David Sanderson <mr.davidsanderson@gmail.com>
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * 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 mr.davidsanderson.uml.client.impl;

import mr.davidsanderson.uml.client.GraphEvent;
import mr.davidsanderson.uml.client.GraphEventBus;
import mr.davidsanderson.uml.client.GraphEventHandler;
import mr.davidsanderson.uml.client.GraphModel;
import mr.davidsanderson.uml.client.GraphEvent.GraphEventType;

import com.allen_sauer.gwt.log.client.Log;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.DockPanel;
import com.google.gwt.user.client.ui.HTML;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.TextArea;
import com.google.inject.Inject;

/**
 * @author dsand
 *
 */
public class EditorPanelImpl extends DockPanel {

    private TextArea textArea;
    private static final String origin = EditorPanelImpl.class.getName();
    private boolean editing = false;
    private GraphModel model;

    /**
     * 
     */
    @Inject
    public EditorPanelImpl(final GraphEventBus graphEventBus, GraphModel model) {
        Log.debug("UMLEditorPanel : start");
        this.model = model;
        graphEventBus.addHandler(eventHandler, GraphEvent.getType());
        // set editor
        this.setSpacing(5);
        this.setSize("100%", "100%");
        this.textArea = new TextArea();
        this.textArea.setSize("100%", "100%");

        HorizontalPanel buttonPanel = new HorizontalPanel();
        buttonPanel.setHorizontalAlignment(HorizontalPanel.ALIGN_RIGHT);
        buttonPanel.setSpacing(10);

        Button okBtn = new Button(new HTML("Ok").toString(), new ClickHandler() {

            @Override
            public void onClick(ClickEvent arg0) {
                EditorPanelImpl.this.editing = false;
                Log.debug("UMLEditorPanel.okBtn.onClick : fire event close editor");
                graphEventBus.fireEvent(new GraphEvent(origin, GraphEventType.EDITOR_CLOSE));
                Log.debug("UMLEditorPanel.okBtn.onClick : fire content changed");
                graphEventBus.fireEvent(new GraphEvent(origin, textArea.getText(), GraphEventType.CONTENT_CHANGED));
            }
        });
        Button cancelBtn = new Button(new HTML("Cancel").toString(), new ClickHandler() {
            public void onClick(ClickEvent arg0) {
                EditorPanelImpl.this.editing = false;
                Log.debug("UMLEditorPanel.cancelBtn.onClick : fire event close editor");
                graphEventBus.fireEvent(new GraphEvent(origin, GraphEventType.EDITOR_CLOSE));
            }
        });
        buttonPanel.add(okBtn);
        buttonPanel.add(cancelBtn);

        this.add(textArea, DockPanel.CENTER);
        this.add(buttonPanel, DockPanel.SOUTH);
        this.setCellHorizontalAlignment(buttonPanel, DockPanel.ALIGN_CENTER);
        this.setCellVerticalAlignment(buttonPanel, DockPanel.ALIGN_BOTTOM);
        this.setCellHeight(textArea, "99%");
        this.setCellHorizontalAlignment(textArea, DockPanel.ALIGN_LEFT);
        this.setCellVerticalAlignment(textArea, DockPanel.ALIGN_MIDDLE);
    }

    private GraphEventHandler eventHandler = new GraphEventHandler() {

        @Override
        public void onContentChangedEvent(GraphEvent event) {
            Log.debug("UMLEditorPanel.eventHandler.onContentChangedEvent : set text area.");

            if (editing) {
                Log.debug("UMLEditorPanel.eventHandler.onContentChangedEvent : we are editing so ignore?....");
                new EditingDialog(event.getUmlContent()).show();
            } else {
                Log.debug("UMLEditorPanel.eventHandler.onContentChangedEvent : we are not editing");
                textArea.setText(event.getUmlContent());
            }
        }

        @Override
        public void onEdit(GraphEvent event) {
            if (event.getEventType().equals(GraphEventType.EDITOR_OPEN)) {
                EditorPanelImpl.this.editing = true;
                textArea.setText(model.getModel());
            }
        }

        @Override
        public void onService(GraphEvent event) {
        }

    };

    private class EditingDialog extends DialogBox {

        public EditingDialog(final String umlContent) {
            HorizontalPanel buttonPanel = new HorizontalPanel();
            buttonPanel.setHorizontalAlignment(HorizontalPanel.ALIGN_RIGHT);
            buttonPanel.setSpacing(10);
            Button yesBtn = new Button("Yes", new ClickHandler() {

                @Override
                public void onClick(ClickEvent arg0) {
                    EditingDialog.this.hide();

                    EditorPanelImpl.this.textArea.setText(umlContent);

                }

            });
            buttonPanel.add(yesBtn);
            Button noBtn = new Button("No", new ClickHandler() {

                @Override
                public void onClick(ClickEvent arg0) {
                    EditingDialog.this.hide();
                }

            });
            buttonPanel.add(noBtn);

            this.add(buttonPanel);
            this.setText("The UML content has been updated, replace editor contents?");
            this.setModal(true);
        }

    }

}