Java Tutorial/SWT/Device

17. List the display"s boundaries, client area

Device represents a physical device. It"s an abstract class, and has two concrete subclasses: Display and Printer.

   <source lang="java">

import org.eclipse.swt.graphics.Device; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class DeviceDisplayBoundary {

 public static void main(String[] args) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   Device device = shell.getDisplay();
   
   System.out.println("getBounds(): "+ device.getBounds());
   System.out.println("getClientArea(): " +device.getClientArea());
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
   display.dispose();
 }

}</source>

17. List the display"s color depth, DPI

   <source lang="java">

import org.eclipse.swt.graphics.Device; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class DeviceDPI {

 public static void main(String[] args) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   Device device = shell.getDisplay();
   System.out.println("getDepth(): " + device.getDepth());
   System.out.println("getDPI(): " + device.getDPI());
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
   display.dispose();
 }

}</source>

17. Whether or not it supports printing warnings

   <source lang="java">

import org.eclipse.swt.graphics.Device; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class PrintWarning {

 public static void main(String[] args) {
   final Display display = new Display();
   final Shell shell = new Shell(display);
   Device device = shell.getDisplay();
   // By setting warnings to true and then getting warnings, we know if the
   // current platform supports it
   device.setWarnings(true);
   System.out.println("Warnings supported: " + device.getWarnings());
   while (!shell.isDisposed()) {
     if (!display.readAndDispatch()) {
       display.sleep();
     }
   }
   display.dispose();
 }

}</source>