SearchStyleText.java Source code

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Here is the source code for SearchStyleText.java

Source

/******************************************************************************
 * All Right Reserved. 
 * Copyright (c) 1998, 2004 Jackwind Li Guojie
 * 
 * Created on Feb 22, 2004 12:43:18 AM by JACK
 * $Id$
 * 
 *****************************************************************************/

import java.util.LinkedList;

import org.eclipse.swt.SWT;
import org.eclipse.swt.custom.LineStyleEvent;
import org.eclipse.swt.custom.LineStyleListener;
import org.eclipse.swt.custom.StyleRange;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

public class SearchStyleText {
    Display display = new Display();
    Shell shell = new Shell(display);

    StyledText styledText;
    Text keywordText;
    Button button;

    String keyword;

    public SearchStyleText() {
        shell.setLayout(new GridLayout(2, false));

        styledText = new StyledText(shell, SWT.MULTI | SWT.WRAP | SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
        GridData gridData = new GridData(GridData.FILL_BOTH);
        gridData.horizontalSpan = 2;
        styledText.setLayoutData(gridData);

        keywordText = new Text(shell, SWT.SINGLE | SWT.BORDER);
        keywordText.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));
        Font font = new Font(shell.getDisplay(), "Courier New", 12, SWT.NORMAL);
        styledText.setFont(font);

        button = new Button(shell, SWT.PUSH);
        button.setText("Search");
        button.addSelectionListener(new SelectionAdapter() {
            public void widgetSelected(SelectionEvent e) {
                keyword = keywordText.getText();
                styledText.redraw();
            }
        });

        styledText.addLineStyleListener(new LineStyleListener() {
            public void lineGetStyle(LineStyleEvent event) {
                if (keyword == null || keyword.length() == 0) {
                    event.styles = new StyleRange[0];
                    return;
                }

                String line = event.lineText;
                int cursor = -1;

                LinkedList list = new LinkedList();
                while ((cursor = line.indexOf(keyword, cursor + 1)) >= 0) {
                    list.add(getHighlightStyle(event.lineOffset + cursor, keyword.length()));
                }

                event.styles = (StyleRange[]) list.toArray(new StyleRange[list.size()]);
            }
        });

        keyword = "SW";

        styledText.setText("AWT, SWING \r\nSWT & JFACE");

        shell.pack();
        shell.open();
        //textUser.forceFocus();

        // Set up the event loop.
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch()) {
                // If no more entries in event queue
                display.sleep();
            }
        }

        display.dispose();
    }

    private StyleRange getHighlightStyle(int startOffset, int length) {
        StyleRange styleRange = new StyleRange();
        styleRange.start = startOffset;
        styleRange.length = length;
        styleRange.background = shell.getDisplay().getSystemColor(SWT.COLOR_YELLOW);
        return styleRange;
    }

    public static void main(String[] args) {
        new SearchStyleText();
    }
}