de.topicmapslab.kuria.swtgenerator.edit.dialog.SelectionDialog.java Source code

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Here is the source code for de.topicmapslab.kuria.swtgenerator.edit.dialog.SelectionDialog.java

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/*******************************************************************************
 * Copyright 2010, Topic Maps Lab
 * 
 * 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 de.topicmapslab.kuria.swtgenerator.edit.dialog;

import java.util.List;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.viewers.AbstractTableViewer;
import org.eclipse.jface.viewers.ArrayContentProvider;
import org.eclipse.jface.viewers.CheckboxTableViewer;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;
import org.eclipse.jface.viewers.ViewerSorter;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

import de.topicmapslab.kuria.runtime.IBindingContainer;
import de.topicmapslab.kuria.swtgenerator.edit.IContentProvider;
import de.topicmapslab.kuria.swtgenerator.util.TextBindingLabelProvider;

/**
 * @author Hannes Niederhausen
 *
 */
public class SelectionDialog extends Dialog {

    private final IContentProvider contentProvider;
    private final IBindingContainer bc;
    private final String fieldname;
    private final Object model;

    private Object[] initialSelection;
    private CheckboxTableViewer checkTableViewer;
    private Text filterText;

    private Object[] selection;

    public SelectionDialog(Shell parentShell, IBindingContainer bindingContainer, IContentProvider contentProvider,
            String fieldname, Object model) {
        super(parentShell);
        this.bc = bindingContainer;
        this.model = model;
        this.fieldname = fieldname;
        this.contentProvider = contentProvider;
        selection = new Object[0];
    }

    @Override
    protected Control createDialogArea(Composite parent) {
        Composite comp = new Composite(parent, SWT.NONE);
        comp.setLayout(new GridLayout());

        filterText = new Text(comp, SWT.ICON_SEARCH | SWT.SEARCH | SWT.BORDER | SWT.ICON_CANCEL);
        filterText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        filterText.addModifyListener(new ModifyListener() {

            public void modifyText(ModifyEvent e) {
                checkTableViewer.refresh();
            }
        });

        checkTableViewer = CheckboxTableViewer.newCheckList(comp, SWT.BORDER);
        checkTableViewer.setContentProvider(new ArrayContentProvider());
        checkTableViewer.setLabelProvider(new TextBindingLabelProvider(bc));

        GridData gd = new GridData(GridData.FILL_BOTH);
        gd.heightHint = 400;
        gd.widthHint = 500;
        checkTableViewer.getTable().setLayoutData(gd);

        checkTableViewer.setInput(contentProvider.getElements(fieldname, model));
        if (initialSelection != null)
            checkTableViewer.setCheckedElements(initialSelection);

        hookViewerListeners();

        return comp;
    }

    @Override
    protected void okPressed() {
        selection = checkTableViewer.getCheckedElements();
        super.okPressed();
    }

    public void setInitialSelection(List<Object> selection) {
        this.initialSelection = selection.toArray();
    }

    public void setInitialSelection(Object[] selection) {
        this.initialSelection = selection;
    }

    public Object[] getSelection() {
        return selection;
    }

    private void hookViewerListeners() {
        checkTableViewer.setSorter(new ViewerSorter() {
            /**
             * {@inheritDoc}
             */
            @Override
            public int compare(Viewer viewer, Object e1, Object e2) {
                TableViewer tv = (TableViewer) viewer;

                String t1 = ((TextBindingLabelProvider) tv.getLabelProvider()).getText(e1);
                String t2 = ((TextBindingLabelProvider) tv.getLabelProvider()).getText(e2);
                return t1.compareTo(t2);
            }
        });

        checkTableViewer.addFilter(new ViewerFilter() {

            @Override
            public boolean select(Viewer viewer, Object parentElement, Object element) {
                if (filterText.getText().length() == 0)
                    return true;

                if (((CheckboxTableViewer) viewer).getChecked(element))
                    return true;

                String text = ((TextBindingLabelProvider) ((AbstractTableViewer) viewer).getLabelProvider())
                        .getText(element);

                return (text.startsWith(filterText.getText()));
            }
        });
    }

}