Java-Buddy: Create and update LineChart from TableView

Merge the previous articles "Create simple Line Chart" and "Editable TableView" for JavaFX 2.0, to build a interactive LineChart and TableView.
package javafx_table;

import javafx.application.Application;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.chart.*;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;
import javafx.util.Callback;

/**
*
* @web http://java-buddy.blogspot.com/
*/
public class JavaFX_TableView extends Application {
  
   private TableView<XYChart.Data> tableView = new TableView<>();
  
   private ObservableList<XYChart.Data> dataList =
           FXCollections.observableArrayList(
               new XYChart.Data("January", 100),
               new XYChart.Data("February", 200),
               new XYChart.Data("March", 50),
               new XYChart.Data("April", 75),
               new XYChart.Data("May", 110),
               new XYChart.Data("June", 300),
               new XYChart.Data("July", 111),
               new XYChart.Data("August", 30),
               new XYChart.Data("September", 75),
               new XYChart.Data("October", 55),
               new XYChart.Data("November", 225),
               new XYChart.Data("December", 99));
      
   /**
    * @param args the command line arguments
    */
   public static void main(String[] args) {
       launch(args);
   }
  
   @Override
   public void start(Stage primaryStage) {
       primaryStage.setTitle("java-buddy.blogspot.com");
      
       Group root = new Group();
      
       tableView.setEditable(true);
       Callback<TableColumn, TableCell> cellFactory =
               new Callback<TableColumn, TableCell>() {
           @Override
                   public TableCell call(TableColumn p) {
                       return new EditingCell();
                   }
               };

       TableColumn columnMonth = new TableColumn("Month");
       columnMonth.setCellValueFactory(
               new PropertyValueFactory<XYChart.Data,String>("XValue"));

       TableColumn columnValue = new TableColumn("Value");
       columnValue.setCellValueFactory(
               new PropertyValueFactory<XYChart.Data,Number>("YValue"));
      
       //--- Add for Editable Cell of Value field, in Number
       columnValue.setCellFactory(cellFactory);

       columnValue.setOnEditCommit(
               new EventHandler<TableColumn.CellEditEvent<XYChart.Data, Number>>() {
                   @Override public void handle(TableColumn.CellEditEvent<XYChart.Data, Number> t) {
                       ((XYChart.Data)t.getTableView().getItems().get(
                               t.getTablePosition().getRow())).setYValue(t.getNewValue());
                   }
               });

       //---
      
       //--- Prepare LineChart
       final CategoryAxis xAxis = new CategoryAxis();
       final NumberAxis yAxis = new NumberAxis();
      
       xAxis.setLabel("Month");
       yAxis.setLabel("Value");
      
       final LineChart<String, Number> lineChart = new LineChart<>(xAxis,yAxis);

       lineChart.setTitle("LineChart");
       XYChart.Series series = new XYChart.Series(dataList);
       series.setName("XYChart.Series");
       lineChart.getData().add(series);

      
       //--- Prepare TableView
      
       tableView.setItems(dataList);
       tableView.getColumns().addAll(columnMonth, columnValue);
      
       //---
      
       HBox hBox = new HBox();
       hBox.setSpacing(10);
       hBox.getChildren().addAll(tableView, lineChart);

       root.getChildren().add(hBox);
      
       primaryStage.setScene(new Scene(root, 670, 400));
       primaryStage.show();
   }
  
   class EditingCell extends TableCell<XYChart.Data, Number> {

       private TextField textField;
      
       public EditingCell() {}
      
       @Override
       public void startEdit() {
           super.startEdit();
          
           if (textField == null) {
               createTextField();
           }
          
           setGraphic(textField);
           setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
           textField.selectAll();
       }
      
       @Override
       public void cancelEdit() {
           super.cancelEdit();
          
           setText(String.valueOf(getItem()));
           setContentDisplay(ContentDisplay.TEXT_ONLY);
       }

       @Override
       public void updateItem(Number item, boolean empty) {
           super.updateItem(item, empty);
          
           if (empty) {
               setText(null);
               setGraphic(null);
           } else {
               if (isEditing()) {
                   if (textField != null) {
                       textField.setText(getString());
                   }
                   setGraphic(textField);
                   setContentDisplay(ContentDisplay.GRAPHIC_ONLY);
               } else {
                   setText(getString());
                   setContentDisplay(ContentDisplay.TEXT_ONLY);
               }
           }
       }

       private void createTextField() {
           textField = new TextField(getString());
           textField.setMinWidth(this.getWidth() - this.getGraphicTextGap()*2);
           textField.setOnKeyPressed(new EventHandler<KeyEvent>() {
              
               @Override
               public void handle(KeyEvent t) {
                   if (t.getCode() == KeyCode.ENTER) {
                       commitEdit(Double.parseDouble(textField.getText()));
                   } else if (t.getCode() == KeyCode.ESCAPE) {
                       cancelEdit();
                   }
               }
           });
       }
      
       private String getString() {
           return getItem() == null ? "" : getItem().toString();
       }
   }
 
}
Java-Buddy

Friday, April 20, 2012

Create and update LineChart from TableView

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