com.sun.javafx.scene.control.skin.DoubleFieldSkin Maven / Gradle / Ivy
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package com.sun.javafx.scene.control.skin;
import com.sun.javafx.scene.control.DoubleField;
import javafx.application.Platform;
import javafx.beans.InvalidationListener;
import javafx.scene.Node;
/**
*/
public class DoubleFieldSkin extends InputFieldSkin {
private InvalidationListener doubleFieldValueListener;
/**
* Create a new DoubleFieldSkin.
* @param control The DoubleField
*/
public DoubleFieldSkin(final DoubleField control) {
super(control);
// Whenever the value changes on the control, we need to update the text
// in the TextField. The only time this is not the case is when the update
// to the control happened as a result of an update in the text textField.
control.valueProperty().addListener(doubleFieldValueListener = observable -> {
updateText();
});
}
@Override public DoubleField getSkinnable() {
return (DoubleField) control;
}
@Override public Node getNode() {
return getTextField();
}
/**
* Called by a Skinnable when the Skin is replaced on the Skinnable. This method
* allows a Skin to implement any logic necessary to clean up itself after
* the Skin is no longer needed. It may be used to release native resources.
* The methods {@link #getSkinnable()} and {@link #getNode()}
* should return null following a call to dispose. Calling dispose twice
* has no effect.
*/
@Override
public void dispose() {
((DoubleField) control).valueProperty().removeListener(doubleFieldValueListener);
super.dispose();
}
@Override
protected boolean accept(String text) {
if (text.length() == 0) return true;
if (text.matches("[0-9\\.]*")) {
try {
Double.parseDouble(text);
return true;
} catch (NumberFormatException ex) { }
}
return false;
}
@Override
protected void updateText() {
getTextField().setText("" + ((DoubleField) control).getValue());
}
@Override
protected void updateValue() {
double value = ((DoubleField) control).getValue();
double newValue;
String text = getTextField().getText() == null ? "" : getTextField().getText().trim();
try {
newValue = Double.parseDouble(text);
if (newValue != value) {
((DoubleField) control).setValue(newValue);
}
} catch (NumberFormatException ex) {
// Empty string most likely
((DoubleField) control).setValue(0);
Platform.runLater(() -> {
getTextField().positionCaret(1);
});
}
}
}