com.archimatetool.editor.views.tree.actions.DeleteAction.java Source code

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Here is the source code for com.archimatetool.editor.views.tree.actions.DeleteAction.java

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/**
 * This program and the accompanying materials
 * are made available under the terms of the License
 * which accompanies this distribution in the file LICENSE.txt
 */
package com.archimatetool.editor.views.tree.actions;

import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Display;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;

import com.archimatetool.editor.views.tree.TreeModelViewer;
import com.archimatetool.editor.views.tree.commands.DeleteCommandHandler;

/**
 * Delete Action
 * 
 * @author Phillip Beauvoir
 */
public class DeleteAction extends ViewerAction {

    public DeleteAction(TreeModelViewer selectionProvider) {
        super(selectionProvider);
        setText(Messages.DeleteAction_0);

        ISharedImages sharedImages = PlatformUI.getWorkbench().getSharedImages();
        setActionDefinitionId("org.eclipse.ui.edit.delete"); // Ensures key binding is displayed //$NON-NLS-1$
        setImageDescriptor(sharedImages.getImageDescriptor(ISharedImages.IMG_TOOL_DELETE));
        setDisabledImageDescriptor(sharedImages.getImageDescriptor(ISharedImages.IMG_TOOL_DELETE_DISABLED));
        setEnabled(false);
    }

    @Override
    public void run() {
        IStructuredSelection selection = getSelection();
        if (selection == null || selection.isEmpty()) {
            return;
        }

        DeleteCommandHandler cmdHandler = new DeleteCommandHandler((TreeModelViewer) getSelectionProvider(),
                selection.toArray());

        /*
         * If the objects are referenced in a diagram warn user
         */
        if (cmdHandler.hasDiagramReferences()) {
            if (!MessageDialog.openQuestion(Display.getDefault().getActiveShell(), Messages.DeleteAction_1,
                    Messages.DeleteAction_2 + "\n\n" + //$NON-NLS-1$
                            Messages.DeleteAction_3)) {
                return;
            }
        }

        cmdHandler.delete();
    }

    @Override
    public void update(IStructuredSelection selection) {
        setEnabled(false);
        for (Object element : selection.toList()) {
            if (DeleteCommandHandler.canDelete(element)) { // At least one element can be deleted
                setEnabled(true);
                break;
            }
        }
    }

}