org.eclipse.swt.snippets.Snippet132.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet132.java

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/*******************************************************************************
 * Copyright (c) 2000, 2009 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * Printing example snippet: print "Hello World!" in black, outlined in red, to default printer
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.printing.*;
import org.eclipse.swt.widgets.*;

public class Snippet132 {

    public static void main(String[] args) {
        Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 132");
        shell.open();
        PrinterData data = Printer.getDefaultPrinterData();
        if (data == null) {
            System.out.println("Warning: No default printer.");
            display.dispose();
            return;
        }
        Printer printer = new Printer(data);
        if (printer.startJob("SWT Printing Snippet")) {
            Color black = printer.getSystemColor(SWT.COLOR_BLACK);
            Color white = printer.getSystemColor(SWT.COLOR_WHITE);
            Color red = printer.getSystemColor(SWT.COLOR_RED);
            Rectangle trim = printer.computeTrim(0, 0, 0, 0);
            Point dpi = printer.getDPI();
            int leftMargin = dpi.x + trim.x; // one inch from left side of paper
            if (leftMargin < 0)
                leftMargin = -trim.x; // make sure to print on the printable area
            int topMargin = dpi.y / 2 + trim.y; // one-half inch from top edge of paper
            if (topMargin < 0)
                topMargin = -trim.y; // make sure to print on the printable area
            GC gc = new GC(printer);
            if (printer.startPage()) {
                gc.setBackground(white);
                gc.setForeground(black);
                String testString = "Hello World!";
                Point extent = gc.stringExtent(testString);
                gc.drawString(testString, leftMargin, topMargin);
                gc.setForeground(red);
                gc.drawRectangle(leftMargin, topMargin, extent.x, extent.y);
                printer.endPage();
            }
            gc.dispose();
            printer.endJob();
        }
        printer.dispose();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}