org.whole.lang.ui.controls.AbstractBrowseChooser.java Source code

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Here is the source code for org.whole.lang.ui.controls.AbstractBrowseChooser.java

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/**
 * Copyright 2004-2014 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.ui.controls;

import org.eclipse.jface.dialogs.Dialog;
import org.eclipse.jface.window.Window;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Text;

/**
 * @author Enrico Persiani
 */
public abstract class AbstractBrowseChooser extends Composite {
    protected int buttonWidthHint;
    protected Button browseButton;
    protected Text chooserText;
    protected Object[] selectedElements;
    protected String label;

    public AbstractBrowseChooser(Composite parent, int style, String label, int buttonWidthHint) {
        super(parent, style);
        this.buttonWidthHint = buttonWidthHint;
        this.label = label;

        GridLayout layout = new GridLayout();
        layout.numColumns = 3;
        setLayout(layout);

        addControls();
    }

    protected void addControls() {
        // container label
        Label resourcesLabel = new Label(this, SWT.NONE);
        resourcesLabel.setText(label);
        resourcesLabel.setFont(this.getFont());

        chooserText = new Text(this, SWT.SINGLE | SWT.BORDER);
        GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL | GridData.GRAB_HORIZONTAL);
        chooserText.setLayoutData(data);
        chooserText.setFont(this.getFont());
        chooserText.setEditable(false);

        browseButton = new Button(this, SWT.PUSH);
        browseButton.setText("Browse ...");
        browseButton.setFont(this.getFont());
        GridData buttonData = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
        buttonData.widthHint = buttonWidthHint;
        browseButton.setLayoutData(buttonData);
        browseButton.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                showChooser();
            }
        });
    }

    protected abstract Dialog createDialog();

    protected void showChooser() {
        Dialog dialog = createDialog();
        if (dialog.open() == Window.OK) {
            selectedElements = getResult(dialog);
            if (selectedElements != null) {
                chooserText.setText(resultToString(selectedElements));
            } else
                chooserText.setText("");
        }
    }

    protected abstract Object[] getResult(Dialog dialog);

    protected abstract String resultToString(Object[] selectedElements);

    public void addModifyListener(ModifyListener listener) {
        chooserText.addModifyListener(listener);
    }

    public void removeModifyListener(ModifyListener listener) {
        chooserText.removeModifyListener(listener);
    }

    public void setText(String text) {
        chooserText.setText(text);
    }
}