org.primaresearch.web.gwt.client.ui.page.tool.DeleteContentObjectTool.java Source code

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Here is the source code for org.primaresearch.web.gwt.client.ui.page.tool.DeleteContentObjectTool.java

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/*
 * Copyright 2014 PRImA Research Lab, University of Salford, United Kingdom
 *
 * 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 org.primaresearch.web.gwt.client.ui.page.tool;

import org.primaresearch.dla.page.layout.physical.shared.LowLevelTextType;
import org.primaresearch.dla.page.layout.physical.shared.RegionType;
import org.primaresearch.web.gwt.client.page.PageLayoutC;
import org.primaresearch.web.gwt.client.page.PageSyncManager;
import org.primaresearch.web.gwt.client.ui.page.SelectionManager;
import org.primaresearch.web.gwt.shared.page.ContentObjectC;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.i18n.client.HasDirection.Direction;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.DialogBox;
import com.google.gwt.user.client.ui.HasHorizontalAlignment.HorizontalAlignmentConstant;
import com.google.gwt.user.client.ui.HorizontalPanel;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.Panel;
import com.google.gwt.user.client.ui.UIObject;
import com.google.gwt.user.client.ui.VerticalPanel;

/**
 * Tool for deleting a page content object.
 * 
 * @author Christian Clausner
 *
 */
public class DeleteContentObjectTool {

    /**
     * Static method to run the tool (requests confirmation from the user).
     * 
     * @param panel Parent panel
     * @param showRelativeTo Widget to which the confirmation dialogue is aligned to.
     * @param layout Page layout
     * @param object Content object to delete
     * @param syncManager Synchronisation manager to send the delete request to the server
     * @param selectionManager Content object selection manager for adding a listener
     */
    public static void run(Panel panel, UIObject showRelativeTo, PageLayoutC layout, ContentObjectC object,
            PageSyncManager syncManager, SelectionManager selectionManager) {
        if (layout == null || object == null)
            return;

        showConfiramtionDialog(panel, showRelativeTo, layout, object, syncManager, selectionManager);
    }

    private static void showConfiramtionDialog(Panel parent, UIObject showRelativeTo, final PageLayoutC layout,
            final ContentObjectC object, final PageSyncManager syncManager,
            final SelectionManager selectionManager) {
        final DialogBox confirmationDialog = new DialogBox();

        final VerticalPanel vertPanel = new VerticalPanel();
        confirmationDialog.add(vertPanel);

        Label confirmLabel = new Label();
        vertPanel.add(confirmLabel);

        final HorizontalPanel horPanel = new HorizontalPanel();
        horPanel.setWidth("100%");
        horPanel.setSpacing(5);
        horPanel.setHorizontalAlignment(HorizontalAlignmentConstant.endOf(Direction.LTR));
        vertPanel.add(horPanel);

        Button buttonCancel = new Button("Cancel");
        horPanel.add(buttonCancel);
        buttonCancel.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                confirmationDialog.hide();
            }
        });

        Button buttonDelete = new Button("Delete");
        horPanel.add(buttonDelete);
        buttonDelete.addClickHandler(new ClickHandler() {
            @Override
            public void onClick(ClickEvent event) {
                syncManager.deleteContentObject(object);
                layout.remove(object);
                selectionManager.clearSelection();
                confirmationDialog.hide();
            }
        });

        String text = "Delete selected ";
        if (object.getType() instanceof RegionType)
            text += "region";
        else if (LowLevelTextType.TextLine.equals(object.getType()))
            text += "text line";
        else if (LowLevelTextType.Word.equals(object.getType()))
            text += "word";
        else if (LowLevelTextType.Glyph.equals(object.getType()))
            text += "glyph";
        text += "?";
        confirmLabel.setText(text);

        parent.add(confirmationDialog);
        if (showRelativeTo != null)
            confirmationDialog.showRelativeTo(showRelativeTo);
        else
            confirmationDialog.show();

    }
}