通过图表上点击鼠标左键,我想通过创建一个文本区域矩形,这样才能够调整并移动到写入文本。
任何帮助非常感谢
编辑 :你好sarcan非常感谢你的善意回应。
我想你的代码,它编译并绘制一个区域图与注释,非常伟大的工作!
我现在需要改变的方式你的代码能够与键键盘输入一旦离开鼠标单击打印注解的现在不是。
下面是完整的代码
import javafx.application.Application;
import javafx.beans.InvalidationListener;
import javafx.beans.Observable;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.chart.AreaChart;
import javafx.scene.chart.Axis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.scene.chart.XYChart.Data;
import javafx.scene.chart.XYChart.Series;
import javafx.scene.control.Label;
import javafx.scene.input.MouseButton;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.stage.Stage;
/**
*
* @author sarcan
*/
public class SampleApp extends Application {
public class SampleChart extends AreaChart<Number, Number> {
public SampleChart() {
super(new NumberAxis(), new NumberAxis());
getXAxis().setLabel("X");
getYAxis().setLabel("Y");
final Series<Number, Number> data = new Series<Number, Number>();
data.setName("Dummy data");
data.getData().addAll(
new Data<Number, Number>(0,4),
new Data<Number, Number>(1,5),
new Data<Number, Number>(2,6),
new Data<Number, Number>(3,5),
new Data<Number, Number>(4,5),
new Data<Number, Number>(5,7),
new Data<Number, Number>(6,8),
new Data<Number, Number>(7,9),
new Data<Number, Number>(8,7)
);
getData().add(data);
}
}
public class ChartAnnotationNode {
private final Node _node;
private double _x;
private double _y;
public ChartAnnotationNode(final Node node, final double x, final double y) {
_node = node;
_x = x;
_y = y;
}
public Node getNode() {
return _node;
}
public double getX() {
return _x;
}
public double getY() {
return _y;
}
public void setX(final double x) {
_x = x;
}
public void setY(final double y) {
_y = y;
}
}
public class ChartAnnotationOverlay extends Pane {
private ObservableList<ChartAnnotationNode> _annotationNodes;
private XYChart<Number, Number> _chart;
public ChartAnnotationOverlay(final XYChart<Number, Number> chart) {
_chart = chart;
/* Create a list to hold your annotations */
_annotationNodes = FXCollections.observableArrayList();
/* This will be our update listener, to be invoked whenever the chart changes or annotations are added */
final InvalidationListener listener = new InvalidationListener() {
@Override
public void invalidated(final Observable observable) {
update();
}
};
_chart.needsLayoutProperty().addListener(listener);
_annotationNodes.addListener(listener);
/* Add new annotations by shift-clicking */
setOnMouseClicked(new EventHandler<MouseEvent>() {
@Override
public void handle(final MouseEvent mouseEvent) {
if (mouseEvent.getButton() == MouseButton.PRIMARY && mouseEvent.isShiftDown())
addAnnotation(mouseEvent.getX(), mouseEvent.getY());
}
});
}
/**
* Invoked whenever the chart changes or annotations are added. This basically does a relayout of the annotation nodes.
*/
private void update(){
getChildren().clear();
final Axis<Number> xAxis = _chart.getXAxis();
final Axis<Number> yAxis = _chart.getYAxis();
/* For each annotation, add a circle indicating the position and the custom node right next to it */
for (ChartAnnotationNode annotation : _annotationNodes) {
final double x = xAxis.localToParent(xAxis.getDisplayPosition(annotation.getX()), 0).getX() + _chart.getPadding().getLeft();
final double y = yAxis.localToParent(0,yAxis.getDisplayPosition(annotation.getY())).getY() + _chart.getPadding().getTop();
final Circle indicator = new Circle(3);
indicator.setStroke(Color.BLUEVIOLET);
indicator.setCenterX(x);
indicator.setCenterY(y);
getChildren().add(indicator);
final Node node = annotation.getNode();
getChildren().add(node);
node.relocate(x + 10, y - node.prefHeight(Integer.MAX_VALUE) / 2);
node.autosize();
}
}
/**
* Add a new annotation for the given display coordinate.
*/
private void addAnnotation(final double displayX, final double displayY){
final Axis<Number> xAxis = _chart.getXAxis();
final Axis<Number> yAxis = _chart.getYAxis();
final double x = (xAxis.getValueForDisplay(xAxis.parentToLocal(displayX, 0).getX() - _chart.getPadding().getLeft())).doubleValue();
final double y = (yAxis.getValueForDisplay(yAxis.parentToLocal(0, displayY).getY() - _chart.getPadding().getTop())).doubleValue();
if (xAxis.isValueOnAxis(x) && yAxis.isValueOnAxis(y))
_annotationNodes.add(new ChartAnnotationNode(new Label("Annotation "+System.currentTimeMillis()), x, y));
}
}
@Override
public void start(final Stage stage) throws Exception {
final SampleChart chart = new SampleChart();
final ChartAnnotationOverlay overlay = new ChartAnnotationOverlay(chart);
final StackPane stackPane = new StackPane();
stackPane.getChildren().addAll(chart, overlay);
final Scene scene = new Scene(stackPane);
stage.setScene(scene);
stage.setWidth(800);
stage.setHeight(600);
stage.show();
}
public static void main(String[] args) {
Application.launch(args);
}
}