inputdialog1.java

Eclipse从入门到精通源代码/第二篇 SWT_JFace篇(6-16章)

/**
 * @作者：陈刚
 * @Email：[e-mail]
 * @Blog：http://blog.csdn.net/glchengang
 */
package jface.dialog;

import org.eclipse.jface.dialogs.IInputValidator;
import org.eclipse.jface.dialogs.InputDialog;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class InputDialog1 {

    public static void main(String[] args) {
        try {
            InputDialog1 window = new InputDialog1();
            window.open();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void open() {
        final Display display = Display.getDefault();
        final Shell shell = new Shell();
        shell.setSize(500, 375);
        shell.setText("SWT Application");
        InputDialog dialog = new InputDialog(shell, "标题", "请输入值", "1", new MyValidator());
        if (dialog.open() == InputDialog.OK) {
            String vlaueStr = dialog.getValue();
            System.out.println("输入值：" + vlaueStr);
        }
        shell.layout();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
    }

    /**
     * 值的验证类
     */
    class MyValidator implements IInputValidator {
        /**
         * 返回null值表示值(newText)合法 返回其它字符符串（包括""这样的空字符)表示值不合法
         */
        public String isValid(String newText) {
            float value = 0;
            try {
                value = Float.valueOf(newText).floatValue();
            } catch (java.lang.NumberFormatException e) {
                return "请输入数值";
            }
            if (value > 0 && value < 100)
                return null;//返回null表示newText合法
            else
                return "请输入大于0小于100的数";
        }
    }
}