javafx：如何使TableCell Edit返回双精度而不是字符串，并且字体根据条件改变颜色？
我有一个带有javafx：如何使TableCell Edit返回双精度而不是字符串，并且字体根据条件改变颜色？,java,javafx,Java,Javafx,我有一个带有 public class Trade { private DoubleProperty price; private ReadOnlyBooleanWrapper caution; public Trade(double price){ this.price = new SimpleDoubleProperty(price); this.caution = new ReadOnlyBooleanWrapper();
public class Trade {
private DoubleProperty price;
private ReadOnlyBooleanWrapper caution;
public Trade(double price){
this.price = new SimpleDoubleProperty(price);
this.caution = new ReadOnlyBooleanWrapper();
this.caution.bind(this.volume.greaterThan(0));
}
public double getPrice(){
return this.price.get();
}
public DoubleProperty priceProperty(){
return this.price;
}
public void setPrice(double price){
this.price.set(price);
}
}
TableViewTableColumndouble字符串将被忽略？Pricecautioncaution公共类EditingDoubleCell扩展了TableCell{
私有文本字段文本字段；
公共编辑DoubleCell（）{
}
@凌驾
公开作废已启动IT（）{
如果（！isEmpty（））{
super.startEdit（）；
createTextField（）；
setText（空）；
设置图形（文本字段）；
textField.requestFocus（）；
//textField.selectAll（）；
}
}
@凌驾
公共作废取消编辑（）{
super.cancelEdit（）；
setText（（字符串）getItem（））；
设置图形（空）；
}
@凌驾
public void updateItem（字符串项，布尔值为空）{
super.updateItem（项，空）；
if（空）{
setText（空）；
设置图形（空）；
}否则{
if（isEditing（））{
if（textField！=null）{
setText（getString（））；
}
setText（空）；
设置图形（文本字段）；
}否则{
setText（getString（））；
设置图形（空）；
}
}
}
私有字符串getString（）{
返回getItem（）==null？”：getItem（）.toString（）；
}
私有void createTextField（）{
语言环境=新语言环境（“英语”、“英国”）；
字符串模式=“####，####.##”；
DecimalFormat df=（DecimalFormat）NumberFormat.getNumberInstance（locale）；
df.应用模式（模式）；
//字符串格式=df.format（123456789.123）；
//System.out.println（格式）；
//NumberFormat nf=NumberFormat.getIntegerInstance（）；
textField=新的textField（）；
//添加筛选器以只允许键入整数
textField.setTextFormatter（新的TextFormatter（c->
{
if（c.getControlNewText（）.isEmpty（））{
返回c；
}
ParsePosition ParsePosition=新的ParsePosition（0）；
Object Object=df.parse（c.getControlNewText（），parsePosition）；
if（object==null | | parsePosition.getIndex（）SimpleDoubleProperty price = new SimpleDoubleProperty();
price.setValue(Double.parseDouble(EditingDoubleCell().getString()));
ObservableValue<Double> g = price.asObject();
return g;
SimpleDoubleProperty price=new SimpleDoubleProperty（）；
price.setValue（Double.parseDouble（EditingDoubleCell（）.getString（））；
ObservableValue g=price.asObject（）；
返回g；
此方法预期您可以将字符串解析为double。
对我有用，告诉我是否有用：）问题的第一部分：你可以试试下面的课程（它对我有用）：
对于问题的第一部分，您应该将TextFormatter
创建为TextFormatter
。这使TextFormatter
的valueProperty
成为属性
，因此您可以通过调用getValue（）提交编辑
在格式化程序上。您需要指定一个StringConverter
，以便它知道如何从文本转换为Double
，反之亦然。因此如下所示：
StringConverter<Double> converter = new StringConverter<Double>() {
@Override
public String toString(Double number) {
return df.format(number);
}
@Override
public Double fromString(String string) {
try {
double value = df.parse(string).doubleValue() ;
return value;
} catch (ParseException e) {
e.printStackTrace();
return 0.0 ;
}
}
};
textFormatter = new TextFormatter<>(converter, 0.0, c -> {
if (partialInputPattern.matcher(c.getControlNewText()).matches()) {
return c ;
} else {
return null ;
}
}) ;
这是相当宽容的
现在，不必在用户点击enter键时直接提交编辑，只需在文本格式化程序的值更改时提交编辑即可：
// commit on Enter
textFormatter.valueProperty().addListener((obs, oldValue, newValue) -> {
commitEdit(newValue);
});
整个cell类现在看起来像
public static class EditingDoubleCell extends TableCell<Trade,Double>{
private TextField textField;
private TextFormatter<Double> textFormatter ;
private DecimalFormat df ;
public EditingDoubleCell(String...styleClasses) {
Locale locale = new Locale("en", "UK");
String pattern = "###,###.###";
df = (DecimalFormat) NumberFormat.getNumberInstance(locale);
df.applyPattern(pattern);
getStyleClass().addAll(styleClasses);
}
@Override
public void startEdit() {
if (!isEmpty()) {
super.startEdit();
createTextField();
setText(null);
setGraphic(textField);
textField.requestFocus();
}
}
@Override
public void cancelEdit() {
super.cancelEdit();
setText(df.format(getItem()));
setGraphic(null);
}
@Override
public void updateItem(Double item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
if (isEditing()) {
if (textField != null) {
textField.setText(getString());
}
setText(null);
setGraphic(textField);
} else {
setText(getString());
setGraphic(null);
}
}
}
private String getString() {
return getItem() == null ? "" : df.format(getItem());
}
private void createTextField(){
textField = new TextField();
StringConverter<Double> converter = new StringConverter<Double>() {
@Override
public String toString(Double number) {
return df.format(number);
}
@Override
public Double fromString(String string) {
try {
double value = df.parse(string).doubleValue() ;
return value;
} catch (ParseException e) {
e.printStackTrace();
return 0.0 ;
}
}
};
textFormatter = new TextFormatter<>(converter, 0.0, c ->
{
if (c.getControlNewText().isEmpty()) {
return c;
}
ParsePosition parsePosition = new ParsePosition( 0 );
Object object = df.parse( c.getControlNewText(), parsePosition );
if ( object == null || parsePosition.getIndex() < c.getControlNewText().length() )
{
return null;
}
else
{
return c;
}
} ) ;
// add filter to allow for typing only integer
textField.setTextFormatter( textFormatter);
textField.setText( getString() );
textField.setMinWidth( this.getWidth() - this.getGraphicTextGap() * 2 );
// commit on Enter
textFormatter.valueProperty().addListener((obs, oldValue, newValue) -> {
commitEdit(newValue);
});
}
}
然后只需在要更改样式的单元格上设置一个样式类（例如，将样式类“price cell”
添加到您定义的EditingDoubleCell
），然后您可以根据需要使用CSS样式表来更改样式，例如
.table-row-cell .price-cell {
-fx-text-fill: red ;
}
.table-row-cell:caution .price-cell {
-fx-text-fill: blue ;
}
对于未设置<代码>警告import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Random;
import java.util.function.Function;
import java.util.regex.Pattern;
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.ReadOnlyBooleanProperty;
import javafx.beans.property.ReadOnlyBooleanWrapper;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.css.PseudoClass;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableRow;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.TextFormatter;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import javafx.util.StringConverter;
public class TradeTable extends Application {
private final Random rng = new Random();
@Override
public void start(Stage primaryStage) {
TableView<Trade> table = new TableView<>();
table.setEditable(true);
TableColumn<Trade, Integer> volumeCol = column("Volume", trade -> trade.volumeProperty().asObject());
TableColumn<Trade, Double> priceCol = column("Price", trade -> trade.priceProperty().asObject());
priceCol.setCellFactory(col -> new EditingDoubleCell("price-cell"));
table.getColumns().add(volumeCol);
table.getColumns().add(priceCol);
PseudoClass caution = PseudoClass.getPseudoClass("caution");
table.setRowFactory(tv -> {
TableRow<Trade> row = new TableRow<>();
ChangeListener<Boolean> cautionListener = (obs, wasCaution, isNowCaution) ->
row.pseudoClassStateChanged(caution, isNowCaution);
row.itemProperty().addListener((obs, oldTrade, newTrade) -> {
if (oldTrade != null) {
oldTrade.cautionProperty().removeListener(cautionListener);
}
if (newTrade == null) {
row.pseudoClassStateChanged(caution, false);
} else {
row.pseudoClassStateChanged(caution, newTrade.isCaution());
newTrade.cautionProperty().addListener(cautionListener);
}
});
return row ;
});
table.getItems().addAll(createRandomData());
Button button = new Button("Change Data");
button.setOnAction(e -> table.getItems().forEach(trade -> {
if (rng.nextDouble() < 0.5) {
trade.setVolume(0);
} else {
trade.setVolume(rng.nextInt(10000));
}
trade.setPrice(rng.nextDouble() * 1000);
}));
BorderPane.setAlignment(button, Pos.CENTER);
BorderPane.setMargin(button, new Insets(10));
BorderPane root = new BorderPane(table, null, null, button, null);
Scene scene = new Scene(root, 600, 600);
scene.getStylesheets().add("trade-table.css");
primaryStage.setScene(scene);
primaryStage.show();
}
private List<Trade> createRandomData() {
List<Trade> trades = new ArrayList<>(50);
for (int i = 0 ; i < 50; i++) {
int volume = rng.nextDouble() < 0.5 ? 0 : rng.nextInt(10000) ;
double price = rng.nextDouble() * 10000 ;
trades.add(new Trade(price, volume));
}
return trades ;
}
private static <S,T> TableColumn<S,T> column(String title, Function<S, ObservableValue<T>> property) {
TableColumn<S,T> col = new TableColumn<>(title);
col.setCellValueFactory(cellData -> property.apply(cellData.getValue()));
return col ;
}
public static class Trade {
private DoubleProperty price;
private IntegerProperty volume ;
private ReadOnlyBooleanWrapper caution;
public Trade(double price, int volume){
this.price = new SimpleDoubleProperty(price);
this.volume = new SimpleIntegerProperty(volume);
this.caution = new ReadOnlyBooleanWrapper();
this.caution.bind(this.volume.greaterThan(0));
}
public double getPrice(){
return this.price.get();
}
public DoubleProperty priceProperty(){
return this.price;
}
public void setPrice(double price){
this.price.set(price);
}
public final IntegerProperty volumeProperty() {
return this.volume;
}
public final int getVolume() {
return this.volumeProperty().get();
}
public final void setVolume(final int volume) {
this.volumeProperty().set(volume);
}
public final ReadOnlyBooleanProperty cautionProperty() {
return this.caution.getReadOnlyProperty();
}
public final boolean isCaution() {
return this.cautionProperty().get();
}
}
public static class EditingDoubleCell extends TableCell<Trade,Double>{
private TextField textField;
private TextFormatter<Double> textFormatter ;
private Pattern partialInputPattern = Pattern.compile(
"[-+]?[,0-9]*(\\.[0-9]*)?");
private DecimalFormat df ;
public EditingDoubleCell(String...styleClasses) {
Locale locale = new Locale("en", "UK");
String pattern = "###,###.###";
df = (DecimalFormat) NumberFormat.getNumberInstance(locale);
df.applyPattern(pattern);
getStyleClass().addAll(styleClasses);
}
@Override
public void startEdit() {
if (!isEmpty()) {
super.startEdit();
createTextField();
setText(null);
setGraphic(textField);
textField.requestFocus();
}
}
@Override
public void cancelEdit() {
super.cancelEdit();
setText(df.format(getItem()));
setGraphic(null);
}
@Override
public void updateItem(Double item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
if (isEditing()) {
if (textField != null) {
textField.setText(getString());
}
setText(null);
setGraphic(textField);
} else {
setText(getString());
setGraphic(null);
}
}
}
private String getString() {
return getItem() == null ? "" : df.format(getItem());
}
private void createTextField(){
textField = new TextField();
StringConverter<Double> converter = new StringConverter<Double>() {
@Override
public String toString(Double number) {
return df.format(number);
}
@Override
public Double fromString(String string) {
try {
double value = df.parse(string).doubleValue() ;
return value;
} catch (ParseException e) {
e.printStackTrace();
return 0.0 ;
}
}
};
textFormatter = new TextFormatter<>(converter, 0.0, c -> {
if (partialInputPattern.matcher(c.getControlNewText()).matches()) {
return c ;
} else {
return null ;
}
}) ;
// add filter to allow for typing only integer
textField.setTextFormatter( textFormatter);
textField.setText( getString() );
textField.setMinWidth( this.getWidth() - this.getGraphicTextGap() * 2 );
// commit on Enter
textFormatter.valueProperty().addListener((obs, oldValue, newValue) -> {
commitEdit(newValue);
});
}
}
public static void main(String[] args) {
launch(args);
}
}
导入java.text.DecimalFormat；
导入java.text.NumberFormat；
导入java.text.ParseException；
导入java.text.ParsePosition；
导入java.util.ArrayList；
导入java.util.List；
导入java.util.Locale；
导入java.util.Random；
导入java.util.function.function；
导入java.util.regex.Pattern；
导入javafx.application.application；
导入javafx.beans.property.DoubleProperty；
导入javafx.beans.property.IntegerProperty；
导入javafx.beans.property.ReadOnlyBooleanProperty；
导入javafx.beans.property.ReadOnlyBooleanWrapper；
导入javafx.beans.property.SimpleDoubleProperty；
导入javafx.beans.property.SimpleIntegerProperty；
导入javafx.beans.value.ChangeListener；
导入javafx.beans.value.observeValue；
导入javafx.css.pseudo类；
进口
// commit on Enter
textFormatter.valueProperty().addListener((obs, oldValue, newValue) -> {
commitEdit(newValue);
});
public static class EditingDoubleCell extends TableCell<Trade,Double>{
private TextField textField;
private TextFormatter<Double> textFormatter ;
private DecimalFormat df ;
public EditingDoubleCell(String...styleClasses) {
Locale locale = new Locale("en", "UK");
String pattern = "###,###.###";
df = (DecimalFormat) NumberFormat.getNumberInstance(locale);
df.applyPattern(pattern);
getStyleClass().addAll(styleClasses);
}
@Override
public void startEdit() {
if (!isEmpty()) {
super.startEdit();
createTextField();
setText(null);
setGraphic(textField);
textField.requestFocus();
}
}
@Override
public void cancelEdit() {
super.cancelEdit();
setText(df.format(getItem()));
setGraphic(null);
}
@Override
public void updateItem(Double item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
if (isEditing()) {
if (textField != null) {
textField.setText(getString());
}
setText(null);
setGraphic(textField);
} else {
setText(getString());
setGraphic(null);
}
}
}
private String getString() {
return getItem() == null ? "" : df.format(getItem());
}
private void createTextField(){
textField = new TextField();
StringConverter<Double> converter = new StringConverter<Double>() {
@Override
public String toString(Double number) {
return df.format(number);
}
@Override
public Double fromString(String string) {
try {
double value = df.parse(string).doubleValue() ;
return value;
} catch (ParseException e) {
e.printStackTrace();
return 0.0 ;
}
}
};
textFormatter = new TextFormatter<>(converter, 0.0, c ->
{
if (c.getControlNewText().isEmpty()) {
return c;
}
ParsePosition parsePosition = new ParsePosition( 0 );
Object object = df.parse( c.getControlNewText(), parsePosition );
if ( object == null || parsePosition.getIndex() < c.getControlNewText().length() )
{
return null;
}
else
{
return c;
}
} ) ;
// add filter to allow for typing only integer
textField.setTextFormatter( textFormatter);
textField.setText( getString() );
textField.setMinWidth( this.getWidth() - this.getGraphicTextGap() * 2 );
// commit on Enter
textFormatter.valueProperty().addListener((obs, oldValue, newValue) -> {
commitEdit(newValue);
});
}
}
PseudoClass caution = PseudoClass.getPseudoClass("caution");
table.setRowFactory(tv -> {
TableRow<Trade> row = new TableRow<>();
ChangeListener<Boolean> cautionListener = (obs, wasCaution, isNowCaution) ->
row.pseudoClassStateChanged(caution, isNowCaution);
row.itemProperty().addListener((obs, oldTrade, newTrade) -> {
if (oldTrade != null) {
oldTrade.cautionProperty().removeListener(cautionListener);
}
if (newTrade == null) {
row.pseudoClassStateChanged(caution, false);
} else {
row.pseudoClassStateChanged(caution, newTrade.isCaution());
newTrade.cautionProperty().addListener(cautionListener);
}
});
return row ;
});
.table-row-cell .price-cell {
-fx-text-fill: red ;
}
.table-row-cell:caution .price-cell {
-fx-text-fill: blue ;
}
import java.text.DecimalFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Random;
import java.util.function.Function;
import java.util.regex.Pattern;
import javafx.application.Application;
import javafx.beans.property.DoubleProperty;
import javafx.beans.property.IntegerProperty;
import javafx.beans.property.ReadOnlyBooleanProperty;
import javafx.beans.property.ReadOnlyBooleanWrapper;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.beans.property.SimpleIntegerProperty;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.css.PseudoClass;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableRow;
import javafx.scene.control.TableView;
import javafx.scene.control.TextField;
import javafx.scene.control.TextFormatter;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;
import javafx.util.StringConverter;
public class TradeTable extends Application {
private final Random rng = new Random();
@Override
public void start(Stage primaryStage) {
TableView<Trade> table = new TableView<>();
table.setEditable(true);
TableColumn<Trade, Integer> volumeCol = column("Volume", trade -> trade.volumeProperty().asObject());
TableColumn<Trade, Double> priceCol = column("Price", trade -> trade.priceProperty().asObject());
priceCol.setCellFactory(col -> new EditingDoubleCell("price-cell"));
table.getColumns().add(volumeCol);
table.getColumns().add(priceCol);
PseudoClass caution = PseudoClass.getPseudoClass("caution");
table.setRowFactory(tv -> {
TableRow<Trade> row = new TableRow<>();
ChangeListener<Boolean> cautionListener = (obs, wasCaution, isNowCaution) ->
row.pseudoClassStateChanged(caution, isNowCaution);
row.itemProperty().addListener((obs, oldTrade, newTrade) -> {
if (oldTrade != null) {
oldTrade.cautionProperty().removeListener(cautionListener);
}
if (newTrade == null) {
row.pseudoClassStateChanged(caution, false);
} else {
row.pseudoClassStateChanged(caution, newTrade.isCaution());
newTrade.cautionProperty().addListener(cautionListener);
}
});
return row ;
});
table.getItems().addAll(createRandomData());
Button button = new Button("Change Data");
button.setOnAction(e -> table.getItems().forEach(trade -> {
if (rng.nextDouble() < 0.5) {
trade.setVolume(0);
} else {
trade.setVolume(rng.nextInt(10000));
}
trade.setPrice(rng.nextDouble() * 1000);
}));
BorderPane.setAlignment(button, Pos.CENTER);
BorderPane.setMargin(button, new Insets(10));
BorderPane root = new BorderPane(table, null, null, button, null);
Scene scene = new Scene(root, 600, 600);
scene.getStylesheets().add("trade-table.css");
primaryStage.setScene(scene);
primaryStage.show();
}
private List<Trade> createRandomData() {
List<Trade> trades = new ArrayList<>(50);
for (int i = 0 ; i < 50; i++) {
int volume = rng.nextDouble() < 0.5 ? 0 : rng.nextInt(10000) ;
double price = rng.nextDouble() * 10000 ;
trades.add(new Trade(price, volume));
}
return trades ;
}
private static <S,T> TableColumn<S,T> column(String title, Function<S, ObservableValue<T>> property) {
TableColumn<S,T> col = new TableColumn<>(title);
col.setCellValueFactory(cellData -> property.apply(cellData.getValue()));
return col ;
}
public static class Trade {
private DoubleProperty price;
private IntegerProperty volume ;
private ReadOnlyBooleanWrapper caution;
public Trade(double price, int volume){
this.price = new SimpleDoubleProperty(price);
this.volume = new SimpleIntegerProperty(volume);
this.caution = new ReadOnlyBooleanWrapper();
this.caution.bind(this.volume.greaterThan(0));
}
public double getPrice(){
return this.price.get();
}
public DoubleProperty priceProperty(){
return this.price;
}
public void setPrice(double price){
this.price.set(price);
}
public final IntegerProperty volumeProperty() {
return this.volume;
}
public final int getVolume() {
return this.volumeProperty().get();
}
public final void setVolume(final int volume) {
this.volumeProperty().set(volume);
}
public final ReadOnlyBooleanProperty cautionProperty() {
return this.caution.getReadOnlyProperty();
}
public final boolean isCaution() {
return this.cautionProperty().get();
}
}
public static class EditingDoubleCell extends TableCell<Trade,Double>{
private TextField textField;
private TextFormatter<Double> textFormatter ;
private Pattern partialInputPattern = Pattern.compile(
"[-+]?[,0-9]*(\\.[0-9]*)?");
private DecimalFormat df ;
public EditingDoubleCell(String...styleClasses) {
Locale locale = new Locale("en", "UK");
String pattern = "###,###.###";
df = (DecimalFormat) NumberFormat.getNumberInstance(locale);
df.applyPattern(pattern);
getStyleClass().addAll(styleClasses);
}
@Override
public void startEdit() {
if (!isEmpty()) {
super.startEdit();
createTextField();
setText(null);
setGraphic(textField);
textField.requestFocus();
}
}
@Override
public void cancelEdit() {
super.cancelEdit();
setText(df.format(getItem()));
setGraphic(null);
}
@Override
public void updateItem(Double item, boolean empty) {
super.updateItem(item, empty);
if (empty) {
setText(null);
setGraphic(null);
} else {
if (isEditing()) {
if (textField != null) {
textField.setText(getString());
}
setText(null);
setGraphic(textField);
} else {
setText(getString());
setGraphic(null);
}
}
}
private String getString() {
return getItem() == null ? "" : df.format(getItem());
}
private void createTextField(){
textField = new TextField();
StringConverter<Double> converter = new StringConverter<Double>() {
@Override
public String toString(Double number) {
return df.format(number);
}
@Override
public Double fromString(String string) {
try {
double value = df.parse(string).doubleValue() ;
return value;
} catch (ParseException e) {
e.printStackTrace();
return 0.0 ;
}
}
};
textFormatter = new TextFormatter<>(converter, 0.0, c -> {
if (partialInputPattern.matcher(c.getControlNewText()).matches()) {
return c ;
} else {
return null ;
}
}) ;
// add filter to allow for typing only integer
textField.setTextFormatter( textFormatter);
textField.setText( getString() );
textField.setMinWidth( this.getWidth() - this.getGraphicTextGap() * 2 );
// commit on Enter
textFormatter.valueProperty().addListener((obs, oldValue, newValue) -> {
commitEdit(newValue);
});
}
}
public static void main(String[] args) {
launch(args);
}
}