Вот фрагмент кода, чтобы вызвать контекстное меню изменения размера на линейной диаграмме при щелчке по линейной диаграмме.
final MenuItem resizeItem = new MenuItem("Resize");
resizeItem.setOnAction(new EventHandler<ActionEvent>() {
@Override public void handle(ActionEvent event) {
System.out.println("Resize requested");
}
});
final ContextMenu menu = new ContextMenu(
resizeItem
);
lineChart.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent event) {
if (MouseButton.SECONDARY.equals(event.getButton())) {
menu.show(stage, event.getScreenX(), event.getScreenY());
}
}
});
Некоторые полный пример кода:
![linechartwithcontext](https://i.stack.imgur.com/MvhbO.png)
import javafx.application.Application;
import javafx.event.*;
import javafx.scene.Scene;
import javafx.scene.chart.*;
import javafx.scene.control.*;
import javafx.scene.input.*;
import javafx.stage.Stage;
public class LineChartWithContextMenu extends Application {
@Override public void start(final Stage stage) {
stage.setTitle("Line Chart Sample");
//defining the axes
final NumberAxis xAxis = new NumberAxis();
xAxis.setLabel("Number of Month");
final NumberAxis yAxis = new NumberAxis();
//creating the chart
final LineChart<Number,Number> lineChart =
new LineChart<>(xAxis,yAxis);
lineChart.setTitle("Stock Monitoring, 2010");
//defining a series
XYChart.Series series = new XYChart.Series();
series.setName("My portfolio");
//populating the series with data
series.getData().setAll(
new XYChart.Data(1, 23),
new XYChart.Data(2, 14),
new XYChart.Data(3, 15),
new XYChart.Data(4, 24),
new XYChart.Data(5, 34),
new XYChart.Data(6, 36),
new XYChart.Data(7, 22),
new XYChart.Data(8, 45),
new XYChart.Data(9, 43),
new XYChart.Data(10, 17),
new XYChart.Data(11, 29),
new XYChart.Data(12, 25)
);
lineChart.getData().add(series);
//adding a context menu item to the chart
final MenuItem resizeItem = new MenuItem("Resize");
resizeItem.setOnAction(new EventHandler<ActionEvent>() {
@Override public void handle(ActionEvent event) {
System.out.println("Resize requested");
}
});
final ContextMenu menu = new ContextMenu(
resizeItem
);
lineChart.setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override public void handle(MouseEvent event) {
if (MouseButton.SECONDARY.equals(event.getButton())) {
menu.show(stage, event.getScreenX(), event.getScreenY());
}
}
});
stage.setScene(
new Scene(
lineChart,800,600
)
);
stage.show();
}
public static void main(String[] args) { launch(args); }
}