SWT.rar_ java swt_SWT_java swt_java s_java swt

import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.layout.RowData; import org.eclipse.swt.layout.RowLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Label; import org.eclipse.swt.widgets.ProgressBar; import org.eclipse.swt.widgets.Shell; public class ProgressBar3 { private Display display; private Shell shell; private Composite statusbar; private Label statusbarLabel; private ProgressBar progressBar; private Button hideProbarButton; public static void main(String[] args) { new ProgressBar3().open(); } private void open() { display = Display.getDefault(); shell = new Shell(); shell.setSize(250, 170); // ---------创建窗口中的其他界面组件------------- shell.setLayout(new GridLayout()); createMainComp(shell);//创建主面板 createStatusbar(shell);//创建工具栏 // -----------------END------------------------ shell.layout(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); } private void createMainComp(Composite parent) { Composite comp = new Composite(parent, SWT.BORDER); comp.setLayoutData(new GridData(GridData.FILL_BOTH)); comp.setLayout(new RowLayout()); createButton(comp); } private void createButton(Composite parent) { final Button b1 = new Button(parent, SWT.NONE); b1.setText("隐藏状态栏"); b1.addSelectionListener(new SelectionAdapter() { private boolean flag = true; public void widgetSelected(SelectionEvent e) { // 用statusbar.setVisible(false)来隐藏状态栏是不够的，还必须把它占用的空间也释放出来，这时应该用GridData.exclude GridData data = (GridData) statusbar.getLayoutData(); data.exclude = flag; shell.layout(); b1.setText((flag ? "显示" : "隐藏") + "状态栏"); flag = !flag; } }); hideProbarButton = new Button(parent, SWT.NONE); hideProbarButton.setText("隐藏进度条"); hideProbarButton.setEnabled(false); hideProbarButton.addSelectionListener(new SelectionAdapter() { private boolean flag = false; public void widgetSelected(SelectionEvent e) { progressBar.setVisible(flag); hideProbarButton.setText((flag ? "隐藏" : "显示") + "进度条"); flag = !flag; } }); final Button b3 = new Button(parent, SWT.NONE); b3.setText(" GO "); b3.addSelectionListener(new SelectionAdapter() { private boolean stopFlag = true; public void widgetSelected(SelectionEvent e) { stopFlag = !stopFlag; if (stopFlag) // 根据停止标志stopFlag来判断是停止还是运行 stop(); else go(); } private void stop() { b3.setEnabled(false);// 停止需要时间，在完全停止前要防止再次开始。 b3.setText("GO"); } private void go() { b3.setText("STOP"); progressBar = createProgressBar(statusbar); hideProbarButton.setEnabled(true); statusbar.layout();// 重新布局一下工具栏，使进度条显示出来 new Thread() { public void run() { for (int i = 1; i < 11; i++) { if (display.isDisposed() || stopFlag) { disposeProgressBar(); return; } moveProgressBar(i); try { Thread.sleep(1000); } catch (Throwable e2) {} //停一秒 } disposeProgressBar(); } private void moveProgressBar(final int i) { display.asyncExec(new Runnable() { public void run() { if (!statusbarLabel.isDisposed()) statusbarLabel.setText("前进到第" + i + "步"); if (!progressBar.isDisposed()) progressBar.setSelection(i * 10); } }); } private void disposeProgressBar() { if (display.isDisposed()) return; display.asyncExec(new Runnable() { public void run() { hideProbarButton.setEnabled(false); // 这一句不能放在线程外执行，否则progressBar被创建后就立即被dispose了 progressBar.dispose(); b3.setEnabled(true); } }); } }.start(); } });