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我为 JavaFX 应用程序制作了一个配置面板。我设法创建了一个动态更改侦听器，如下所示：

public class InputMaskChecker implements ChangeListener<String> {

    public static final String NUMERIC      = "^[0-9]*$";
    public static final String TEXTONLY     = "^\\w*$";
    public static final String PASSWORD     = "^[\\w\\+\\!\\?\\-\\$\\&\\%£]+$";
    public static final String DATASOURCE   = "^([a-zA-Z]+:){3}@([a-zA-Z0-9]+:)+[a-zA-Z0-9]+$";
    public static final String TCPPORT      = "^(6553[0-5]|655[0-2]\\d|65[0-4]\\d\\d|6[0-4]\\d{3}|[1-5]\\d{4}|[2-9]\\d{3}|1[1-9]\\d{2}|10[3-9]\\d|102[4-9])$";

    private static final String STYLE = "-fx-effect: dropshadow(gaussian, red, 4, 0.0, 0, 0);";

    public final BooleanProperty erroneous = new SimpleBooleanProperty(false);

    private final String mask;
    private final int max_lenght;
    private final TextField control;


    public InputMaskChecker(String mask, TextField control) {
        this.mask = mask;
        this.max_lenght = 0;
        this.control = control;
    }

    public InputMaskChecker(String mask, int max_lenght, TextField control) {
        this.mask = mask;
        this.max_lenght = max_lenght;
        this.control = control;
    }

    @Override
    public void changed(ObservableValue<? extends String> observableValue, String oldValue, String newValue) {
        erroneous.setValue(!newValue.matches(mask) || ((max_lenght > 0) ? newValue.length() > max_lenght : false) || newValue.length() == 0);
        control.setStyle( erroneous.get() ? STYLE : "-fx-effect: null;");
    }
}

在我的控制器中使用它，如下所示：

field1.textProperty().addListener(new InputMaskChecker(InputMaskChecker.DATASOURCE, field1));
field2.textProperty().addListener(new InputMaskChecker(InputMaskChecker.TEXTONLY, field2));
field3.textProperty().addListener(new InputMaskChecker(InputMaskChecker.PASSWORD, field3));
field4.textProperty().addListener(new InputMaskChecker(InputMaskChecker.NUMERIC, 1, field4));

它按预期工作，但有一个小故障：我想让主控制器上的 SAVE 按钮对侦听器做出反应，如果字段有错误，它就会被禁用。

现在是我的头脑风暴请求。你有什么建议吗？

使用共享SimpleBooleanProperty的 AND-ing 侦听器显然不起作用。

（解决方案）更新：private final BooleanBinding binding;向控制器 添加一个变量。然后：

InputMaskChecker listener1 = new InputMaskChecker(InputMaskChecker.DATASOURCE, field1);
InputMaskChecker listener2 = new InputMaskChecker(InputMaskChecker.DATASOURCE, field2);
InputMaskChecker listener3 = new InputMaskChecker(InputMaskChecker.DATASOURCE, field3);
InputMaskChecker listener4 = new InputMaskChecker(InputMaskChecker.DATASOURCE, field4);

field1.textProperty().addListener(listener1);
field2.textProperty().addListener(listener2);
field3.textProperty().addListener(listener3);
field4.textProperty().addListener(listener4);

binding = new BooleanBinding() {
    {
    super.bind(listener1.erroneous, listener2.erroneous, listener3.erroneous, listener4.erroneous);
    }

    @Override
    protected boolean computeValue() {
        return (listener1.erroneous.get() || listener2.erroneous.get() || listener3.erroneous.get() || listener4.erroneous.get());
    }
};

control.getDisableProperty().bind(binding);

完毕 ;）

4

1 回答 1

0

我可以建议下一个方法：

使您InputMaskChecker有状态public SimpleBooleanProperty valid;，将在更新方法中引用：

@Override
public void changed(ObservableValue<? extends String> observableValue, String oldValue, String newValue) {
    valid.set(!newValue.matches(mask) || ((max_lenght > 0) ? newValue.length() > max_lenght : false) || newValue.length() == 0);
    // BTW, I would suggest to use styleclasses instead for performance reasons
    control.setStyle( valid.get() ? STYLE : "-fx-effect: null; ):
}

然后你可以在“保存”按钮创建中说：

Button btn = new Button("Save");
btn.disableProperty().bind(
      listener1.valid.and(listener2.valid).and(listener3.valid).not());

或创建一个实用方法，该方法将添加侦听器并更新“保存”禁用属性。

于 2012-09-20T14:25:47.620 回答