代码如下

复制代码 代码如下:

package swt_jface.demo;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.SelectionAdapter;

import org.eclipse.swt.events.SelectionEvent;

import org.eclipse.swt.graphics.Image;

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.FileDialog;

import org.eclipse.swt.widgets.Label;

import org.eclipse.swt.widgets.Shell;

import org.eclipse.swt.widgets.Text;

public class IconSelector {

Display display = new Display();

Shell shell = new Shell(display);

Label labelIconFile;

Text textIconFile;

Button buttonIconBrowse;

Button buttonSetIcon;

Image shellIcon;

Image buttonIcon;

public IconSelector() {

initializeUI();

shell.pack();

shell.open();

while (!shell.isDisposed()) {

if (!display.readAndDispatch()) {

display.sleep();

}

}

display.dispose();

}

private void initializeUI() {

GridLayout gridLayout = new GridLayout(3, false);

shell.setLayout(gridLayout);

labelIconFile = new Label(shell, SWT.NULL);

textIconFile = new Text(shell, SWT.SINGLE | SWT.BORDER);

GridData gridData = new GridData(GridData.FILL_HORIZONTAL);

gridData.grabExcessHorizontalSpace = true;

textIconFile.setLayoutData(gridData);

buttonIconBrowse = new Button(shell, SWT.PUSH);

gridData = new GridData();

gridData.horizontalSpan = 3;

gridData.horizontalAlignment = GridData.CENTER;

buttonSetIcon = new Button(shell, SWT.PUSH);

buttonSetIcon.setLayoutData(gridData);

shell.setText("Icon Selector");

labelIconFile.setText("Select an icon:");

buttonIconBrowse.setText("Browse");

buttonSetIcon.setText("Set Icon");

buttonIconBrowse.addSelectionListener(new SelectionAdapter() {

public void widgetSelected(SelectionEvent e) {

FileDialog dialog = new FileDialog(shell, SWT.OPEN);

String file = dialog.open();

if (file != null) {

textIconFile.setText(file);

}

}

});

buttonSetIcon.addSelectionListener(new SelectionAdapter() {

public void widgetSelected(SelectionEvent e) {

if(shellIcon != null)

shellIcon.dispose();

try {

shellIcon = new Image(display, textIconFile.getText());

shell.setImage(shellIcon);

}catch(Exception ex) {

ex.printStackTrace();

}

}

});

}

public static void main(String[] args) {

new IconSelector();

}

}