SWT(JFace)体验之打开多个Form

代码很简单，如下所示：

package swt_jface.demo1;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class Main {

public static void main(String[] args) {

Display display = new Display();

Image small = new Image(display, 16, 16);
GC gc = new GC(small);
gc.setBackground(display.getSystemColor(SWT.COLOR_RED));
gc.fillArc(0, 0, 16, 16, 45, 270);
gc.dispose();

Image large = new Image(display, 32, 32);
gc = new GC(large);
gc.setBackground(display.getSystemColor(SWT.COLOR_BLUE));
gc.fillArc(0, 0, 32, 32, 45, 270);
gc.dispose();

Shell shell = new Shell(display);
shell.setText("Small and Large icons");
shell.setImages(new Image[] {small, large});
Shell shell2 = new Shell(display);
shell2.setText("Small icon");
shell2.setImage(small);

shell.open();
shell2.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
}

下面是打开子画面的代码：

package swt_jface.demo1;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class DialogShell {
public DialogShell() {

Display display = new Display();
final Shell shell = new Shell(display);
shell.setLayout(new RowLayout());
shell.setSize(500, 200);
final Button openDialog = new Button(shell, SWT.PUSH);
openDialog.setText("Click here to rate this book ...");
openDialog.addSelectionListener(new SelectionListener() {

public void widgetSelected(SelectionEvent e) {
final Shell dialog = new Shell(shell, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
dialog.setLayout(new RowLayout());
final String[] ratings =
new String[] {"Killer!", "Good stuff", "So-so", "Needs work" };
final Button[] radios = new Button[ratings.length];
for (int i = 0; i < ratings.length; i++) {
radios[i] = new Button(dialog, SWT.RADIO);
radios[i].setText(ratings[i]);
}
Button rateButton = new Button(dialog, SWT.PUSH);
rateButton.setText("Rate!");
rateButton.addSelectionListener(new SelectionListener() {
public void widgetSelected(SelectionEvent e) {
for (int i = 0; i < radios.length; i++)
if (radios[i].getSelection()) openDialog.setText("Rating: " + ratings[i]);
dialog.close();
}
public void widgetDefaultSelected(SelectionEvent e) {
}
});
dialog.pack();
dialog.open();

Rectangle shellBounds = shell.getBounds();
Point dialogSize = dialog.getSize();
dialog.setLocation(shellBounds.x + (shellBounds.width - dialogSize.x) / 2, shellBounds.y + (shellBounds.height - dialogSize.y) / 2);
}
public void widgetDefaultSelected(SelectionEvent e) {
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
public static void main(String[] args) {
new DialogShell();
}
}