?? jfacedatabinding4.java
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package cn.com.chengang.databinding;
import java.util.Arrays;
import org.apache.commons.lang.math.NumberUtils;
import org.eclipse.jface.internal.databinding.provisional.BindSpec;
import org.eclipse.jface.internal.databinding.provisional.Binding;
import org.eclipse.jface.internal.databinding.provisional.DataBindingContext;
import org.eclipse.jface.internal.databinding.provisional.description.Property;
import org.eclipse.jface.internal.databinding.provisional.validation.IValidator;
import org.eclipse.jface.internal.databinding.provisional.validation.ValidationError;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.layout.RowData;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;
public class JFaceDataBinding4 {
public static void main(String[] args) {
final Display display = Display.getDefault();
final Shell shell = new Shell();
shell.setSize(327, 253);
// ---------創建窗口中的其他界面組件-------------
shell.setLayout(new RowLayout());
final People bean = new People();// 數據
Button button = new Button(shell, SWT.NONE);
button.setText("打印數據");
button.addSelectionListener(new SelectionAdapter() {
public void widgetSelected(SelectionEvent e) {
System.out.println("---------------------------------");
System.out.println("name=" + bean.getName());
System.out.println("age=" + bean.getAge());
System.out.println("sex=" + bean.isSex());
System.out.println("interests=" + Arrays.toString(bean.getInterests().toArray()));
}
});
// 界面組件
Text ageText = new Text(shell, SWT.BORDER);
ageText.setLayoutData(new RowData(50, -1));
Label errorLable = new Label(shell, SWT.BORDER);
errorLable.setLayoutData(new RowData(100, -1));
// 數據綁定
DataBindingContext ctx = DataBindingContextFactory.createContext(shell);
BindSpec spec = new BindSpec(null, null, new MyValidator(), null);
Binding binding = ctx.bind(ageText, new Property(bean, "age"), spec); // 取到Binding對象
// 將ValidationError類的錯誤信息和Label做綁定
ValidationErrorToStringConverter converter1 = new ValidationErrorToStringConverter();
ReadOnlyConverter converter2 = new ReadOnlyConverter(String.class, ValidationError.class);
BindSpec spec2 = new BindSpec(converter1, converter2, null, null);
ctx.bind(errorLable, binding.getPartialValidationError(), spec2); // 綁定isPartiallyValid方法的錯誤
ctx.bind(errorLable, binding.getValidationError(), spec2); // 綁定isValid方法的錯誤
// -----------------END------------------------
shell.layout();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
private static class MyValidator implements IValidator {
// 文本框每次輸入字符都將執行此方法
public ValidationError isPartiallyValid(Object value) {
System.out.println("isPartiallyValid=" + value);
if (NumberUtils.isNumber((String) value))
return null;
else
return new ValidationError(ValidationError.ERROR, "無效的數字");
}
// 文本框第一次設值時執行一次此方法,輸入完成失去焦點時再執行一次
public ValidationError isValid(Object value) {
if ("0".equals(value))
return ValidationError.error("不允許等于0");
else
return null;
}
}
}
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