javafx добавление цвета в строку на основе значения столбца

Question

Мне нужно добавить цвет в строку и столбец на основе значения pnl. Как изменить цвет строки и как получить значение pnl для определения изменения цвета строки.

 TreeTableColumn<ClosedTradesPnL, String> symColumn = new TreeTableColumn<>("Symbol"); 
     symColumn.setPrefWidth(100); 

     symColumn.setCellValueFactory(
      (TreeTableColumn.CellDataFeatures<ClosedTradesPnL, String> param) -> 
      new ReadOnlyStringWrapper(param.getValue().getValue().getSymbol()) 
     ); 


     TreeTableColumn<ClosedTradesPnL, Date> expiryColumn = 
      new TreeTableColumn<>("Expiry Date"); 
     expiryColumn.setPrefWidth(100); 
     expiryColumn.setCellValueFactory(
      (TreeTableColumn.CellDataFeatures<ClosedTradesPnL, Date> param) -> 
      new ReadOnlyObjectWrapper(param.getValue().getValue().getExpiry_date()) 
     ); 




     TreeTableColumn<ClosedTradesPnL, String> pnlColumn = 
      new TreeTableColumn<>("PnL"); 
     pnlColumn.setPrefWidth(100); 
     // pnlColumn.setStyle(" -fx-background-color: red ;"); 
     // pnlColumn.setCellValueFactory(
     //  (TreeTableColumn.CellDataFeatures<ClosedTradesPnL, String> param) -> 
     //  new ReadOnlyStringWrapper(param.getValue().getValue().getRealized_PNL()) 
     //); 
     pnlColumn.setCellValueFactory(new Callback<CellDataFeatures<ClosedTradesPnL, String>, ObservableValue<String>>() { 
    @Override 
    public ObservableValue<String> call(CellDataFeatures<ClosedTradesPnL, String> p) { 

     int foo = Integer.parseInt(p.getValue().getValue().getRealized_PNL().replace(",", "").replace(".", "")); 
     if(foo == 0){ 
      System.out.println("color app"+p.getValue().getValue().getRealized_PNL()); 
      pnlColumn.setStyle(" -fx-background-color: red ;"); 
     }else{ 
     pnlColumn.setStyle("-fx-background-color: white ;"); 
     } 
     System.out.println(p.getValue().getValue().getRealized_PNL()); 
     return new ReadOnlyObjectWrapper(p.getValue().getValue().getRealized_PNL()); 
    } 
    }); 
TreeTableView<ClosedTradesPnL> treeTableView = new TreeTableView<>(root); 
     treeTableView.getColumns().setAll(symColumn, expiryColumn,pnlColumn); 

// pnlColumn.setStyle("-fx-alignment: center-right;-fx-control-inner-background: slateblue;"); 
     sceneRoot.getChildren().add(treeTableView); 
//  if (treeTableView.getRow(root)){treeTableView.setBackground(Background.RED);} 
     stage.setScene(scene); 
     stage.show(); 
    } 

Answer 1

Это должно быть понятно, я включил несколько комментариев.

import java.util.Date; 
import javafx.application.Application; 
import javafx.beans.property.ReadOnlyDoubleWrapper; 
import javafx.beans.property.ReadOnlyObjectWrapper; 
import javafx.beans.property.ReadOnlyStringWrapper; 
import javafx.beans.property.SimpleDoubleProperty; 
import javafx.beans.property.SimpleObjectProperty; 
import javafx.beans.property.SimpleStringProperty; 
import javafx.scene.Scene; 
import javafx.scene.control.TreeItem; 
import javafx.scene.control.TreeTableCell; 
import javafx.scene.control.TreeTableColumn; 
import javafx.scene.control.TreeTableRow; 
import javafx.scene.control.TreeTableView; 
import javafx.stage.Stage; 

public class StyleTableRow extends Application { 

    @Override 
    public void start(Stage primaryStage) { 
     TreeTableView<ClosedTradesPnL> ttv = new TreeTableView<>(new TreeItem<>(new ClosedTradesPnL())); 
     for (int i=0;i<10;i++) ttv.getRoot().getChildren().add(new TreeItem<>(new ClosedTradesPnL())); 
     ttv.getRoot().setExpanded(true); 

     TreeTableColumn<ClosedTradesPnL, String> symColumn = new TreeTableColumn<>("Symbol"); 
     symColumn.setCellValueFactory((param) -> 
      new ReadOnlyStringWrapper(param.getValue().getValue().getSymbol()) 
     ); 

     TreeTableColumn<ClosedTradesPnL, Date> expiryColumn = new TreeTableColumn<>("Expiry Date"); 
     expiryColumn.setCellValueFactory((param) -> 
      new ReadOnlyObjectWrapper<>(param.getValue().getValue().getExpiry_date()) 
     ); 

     //use Number for type of data in column 
     TreeTableColumn<ClosedTradesPnL, Number> pnlColumn = new TreeTableColumn<>("PnL"); 
     pnlColumn.setCellValueFactory((param) -> 
      new ReadOnlyDoubleWrapper(param.getValue().getValue().getRealized_PNL()) 
     ); 

     //now use a cellFactory to style the cell 
     //you can get the row and style it as well 
     pnlColumn.setCellFactory((TreeTableColumn<ClosedTradesPnL, Number> param) -> { 
      TreeTableCell cell = new TreeTableCell<ClosedTradesPnL, Number>(){ 
       @Override 
       //by using Number we don't have to parse a String 
       protected void updateItem(Number item, boolean empty) { 
        super.updateItem(item, empty); 
        TreeTableRow<ClosedTradesPnL> ttr = getTreeTableRow(); 
        if (item == null || empty){ 
         setText(null); 
         ttr.setStyle(""); 
         setStyle(""); 
        } else { 
         ttr.setStyle(item.doubleValue() > 0 
           ? "-fx-background-color:lightgreen" 
           : "-fx-background-color:pink"); 
         setText(item.toString()); 
         setStyle(item.doubleValue() > 0 
           ? "-fx-background-color:green" 
           : "-fx-background-color:red"); 
        } 
       } 
      }; 
      return cell; 
     }); 

     ttv.getColumns().setAll(symColumn, expiryColumn,pnlColumn); 

     Scene scene = new Scene(ttv, 500, 500); 
     primaryStage.setScene(scene); 
     primaryStage.show(); 
    } 

    public static void main(String[] args) { 
     launch(args); 
    } 

    private static class ClosedTradesPnL{ 
     private SimpleStringProperty symbol = new SimpleStringProperty("symbol"); 
     private SimpleObjectProperty<Date> expiry_date = new SimpleObjectProperty<>(new Date(System.currentTimeMillis())); 
     private SimpleDoubleProperty realized_PNL= new SimpleDoubleProperty(Math.random()-0.5); 

     public String getSymbol() {return symbol.get();} 
     public Date getExpiry_date() {return expiry_date.get();} 
     public double getRealized_PNL() {return realized_PNL.get();} 

    } 
}