I improved my previous implementation of TextField validation, this time making a true Custom Control with real-time validation using binding. It is usable with FXML without the need of more Java code.
我改进了以前的TextField验证实现，这一次使用绑定实现了一个实时验证的真正自定义控件。它可以在不需要更多Java代码的情况下使用FXML。
import javafx.beans.binding.BooleanBinding;
import javafx.beans.property.BooleanProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.ReadOnlyBooleanProperty;
import javafx.beans.property.ReadOnlyIntegerProperty;
import javafx.beans.property.ReadOnlyStringProperty;
import javafx.beans.property.SimpleBooleanProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.property.SimpleStringProperty;
import javafx.beans.property.StringProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.scene.control.TextField;
import javafx.scene.effect.BlurType;
import javafx.scene.effect.DropShadow;
import javafx.scene.effect.Effect;
import javafx.scene.paint.Color;
/**
* <p>
* TextField with regex-based real-time input validation.
* JavaFX 2 and FXML compatible. </p>
* <p>
* FXML code example:<div>
* {@code <ValidatedTextField fx:id="validatedTextField" minLength="1" maxLength="1" mask="^[0-9]*$" />}
* </div>
* </p>
*
* @author 82300009
*/
public final class ValidatedTextField extends TextField {
private final BooleanProperty invalid = new SimpleBooleanProperty(false);
private final StringProperty mask;
private final IntegerProperty minLength;
private final IntegerProperty maxLength;
private Effect invalidEffect = new DropShadow(BlurType.GAUSSIAN, Color.RED, 4, 0.0, 0, 0);
public ValidatedTextField() {
super();
this.mask = new SimpleStringProperty(".");
this.minLength = new SimpleIntegerProperty(-1);
this.maxLength = new SimpleIntegerProperty(-1);
bind();
}
public ValidatedTextField(String mask, int minLength, int maxLength, boolean nullable) {
this(mask, minLength, maxLength, nullable, null);
}
public ValidatedTextField(String mask, int minLength, int maxLength, boolean nullable, String string) {
super(string);
this.mask = new SimpleStringProperty(mask);
this.minLength = new SimpleIntegerProperty(minLength);
this.maxLength = new SimpleIntegerProperty(maxLength);
bind();
}
public ReadOnlyBooleanProperty invalidProperty() {
return invalid;
}
public ReadOnlyStringProperty maskProperty() {
return mask;
}
public ReadOnlyIntegerProperty minLengthProperty() {
return minLength;
}
public ReadOnlyIntegerProperty maxLengthProperty() {
return maxLength;
}
public boolean getInvalid() {
return invalid.get();
}
public String getMask() {
return mask.get();
}
public void setMask(String mask) {
this.mask.set(mask);
}
public int getMinLength() {
return minLength.get();
}
public void setMinLength(int minLength) {
this.minLength.set(minLength);
}
public int getMaxLength() {
return maxLength.get();
}
public void setMaxLength(int maxLength) {
this.maxLength.set(maxLength);
}
public Effect getInvalidEffect() {
return this.invalidEffect;
}
public void setInvalidEffect(Effect effect) {
this.invalidEffect = effect;
}
private void bind() {
this.invalid.bind(maskCheck().or(minLengthCheck()));
this.textProperty().addListener(new ChangeListener<String>() {
@Override
public void changed(ObservableValue<? extends String> ov, String t, String t1) {
if (textProperty().get().length() > maxLength.get()) {
setText(t);
}
}
});
this.invalid.addListener(new ChangeListener<Boolean>() {
@Override
public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
if (t ^ t1) {
if (t1) {
// setStyle("-fx-font-weight: bold; -fx-text-fill: red;");
setEffect(invalidEffect);
} else {
// setStyle("-fx-font-weight: normal; -fx-text-fill: inherit;");
setEffect(null);
}
}
}
});
}
private BooleanBinding maskCheck() {
return new BooleanBinding() {
{
super.bind(textProperty(), mask);
}
@Override
protected boolean computeValue() {
return !textProperty().get().matches(mask.get());
}
};
}
private BooleanBinding minLengthCheck() {
return new BooleanBinding() {
{
super.bind(textProperty(), minLength);
}
@Override
protected boolean computeValue() {
return textProperty().get().length() < minLength.get();
}
};
}
private BooleanBinding maxLengthCheck() {
return new BooleanBinding() {
{
super.bind(textProperty(), maxLength);
}
@Override
protected boolean computeValue() {
return textProperty().get().length() > maxLength.get();
}
};
}
}
There is still, however, a trivial point about the "invalid" graphical effect. As you can see here:
然而，对于“无效”的图形效果，仍然有一个微不足道的点。你们可以看到
this.invalid.addListener(new ChangeListener<Boolean>() {
@Override
public void changed(ObservableValue<? extends Boolean> ov, Boolean t, Boolean t1) {
if (t ^ t1) {
if (t1) {
// setStyle("-fx-font-weight: bold; -fx-text-fill: red;");
setEffect(invalidEffect);
} else {
// setStyle("-fx-font-weight: normal; -fx-text-fill: inherit;");
setEffect(null);
}
}
}
});
I tried with the setStyle but using -fx-font-weight: inherit; breaks the code (don't why since it should be its default value). Injecting a StyleClass doesn't work since I can't revert it when invalid is false.
我尝试使用setStyle，但是使用-fx-font-weight:继承;破坏代码(不要解释为什么它应该是它的默认值)。注入一个StyleClass是无效的，因为我不能在无效是错误的时候恢复它。
Any clue? It is of course possible to detach the inner listener and attach another outside with other effects (f.i. showing a green tick sign instead of altering the TextField effect).
有线索吗?当然，可以将内部侦听器分离，并在外部附加其他效果(f.i.显示绿色标记，而不是更改TextField效果)。
You are free to use the code if you mind :)
如果你介意的话，你可以*使用这些代码:)
1 个解决方案
#1
3
You can always revert a style by removing it from the list of style classes i.e.
您可以通过将样式从样式类列表中删除来恢复样式。
node.getStyleClass().remove("my-style");
#1
3
You can always revert a style by removing it from the list of style classes i.e.
您可以通过将样式从样式类列表中删除来恢复样式。
node.getStyleClass().remove("my-style");