// Test.java
//主界面，其中只有一个button,当点击时调用Popup在右下角显示像MSN和QQ一样的popup界面。
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class Test {
public static void main(String[] args) {
final Display display = new Display();
Shell shell = new Shell();
shell.setText("aaa");
shell.setSize(250, 150);
final Button button = new Button(shell, SWT.NONE);
button.setBounds(50, 20, 100, 25);
button.setText("button");
//监听button的事件，当用户点击时调用Popup类显示popup界面。
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
//实例化popup类，构造函数为popup界面中出现的提示信息。
Popup popup = new Popup("您的好友xxx上线了。");
popup.start();
}
});
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
display.sleep();
}
}
display.dispose();
}
}
// Popup.java
//实现像MSN，QQ一样的好友上线通知popup
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class Popup extends Thread {
Shell shell;
protected int moveStep = 2; //每次移动的pixel
protected int upPosition; //能移动到的最上面坐标
protected int downPosition; //当前popup的边框坐标
protected int leftPosition; //popup左边边框坐标 public Popup(final String message) {
shell = new Shell(SWT.ON_TOP);
Text text = new Text(shell, SWT.MULTI | SWT.WRAP);
text.setBounds(10, 20, 180, 80);
text.setBackground(shell.getBackground());
text.setText(message);
//取屏莫大小
Rectangle area = Display.getDefault().getClientArea();
upPosition = area.height - 100;//计算出popup界面在屏幕显示的最高位置
downPosition = area.height + 100;//计算出popup界面的初始位置
leftPosition = area.width - 180;
shell.setSize(180, 100);
//初始化popup位置
shell.setLocation(leftPosition, downPosition);
shell.open();
}
public void run() {
Display display = shell.getDisplay();
while (true) {
try {
Thread.sleep(10);
//判断当前位置是否小于能出现的最高位置，小于的话就说明还可以向上移动。
if ((downPosition - moveStep) > upPosition) {
display.asyncExec(new Runnable() {
public void run() {
shell.setLocation(leftPosition, downPosition- moveStep);
downPosition -= moveStep;
}
});
//此时已经移动到了最高位置，显示5秒钟后，关闭窗口并退出。
} else {
Thread.sleep(5000);
display.asyncExec(new Runnable() {
public void run() {
shell.dispose();
}
});
}
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
