Text javafx2.x:如何在图表上书写文本?

Text javafx2.x:如何在图表上书写文本?,text,javafx-2,Text,Javafx 2,通过鼠标左键单击图表,我想通过创建文本区域矩形来编写文本,以便能够调整大小和移动 非常感谢您的帮助 编辑:您好,非常感谢您的回复 我尝试了你的代码,它编译并绘制了带注释的面积图,非常棒的工作 我现在需要更改您的代码,以便在鼠标左键单击时能够使用键盘键入,而不是现在打印注释 下面是您的完整代码 import javafx.application.Application; import javafx.beans.InvalidationListener; import javafx.beans.Ob

通过鼠标左键单击图表,我想通过创建文本区域矩形来编写文本,以便能够调整大小和移动

非常感谢您的帮助

编辑:您好,非常感谢您的回复

我尝试了你的代码,它编译并绘制了带注释的面积图,非常棒的工作

我现在需要更改您的代码,以便在鼠标左键单击时能够使用键盘键入,而不是现在打印注释

下面是您的完整代码

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);
}
}
导入javafx.application.application;
导入javafx.beans.InvalizationListener;
导入javafx.beans.Observable;
导入javafx.collections.FXCollections;
导入javafx.collections.ObservableList;
导入javafx.event.EventHandler;
导入javafx.scene.Node;
导入javafx.scene.scene;
导入javafx.scene.chart.AreaChart;
导入javafx.scene.chart.Axis;
导入javafx.scene.chart.NumberAxis;
导入javafx.scene.chart.XYChart;
导入javafx.scene.chart.XYChart.Data;
导入javafx.scene.chart.XYChart.Series;
导入javafx.scene.control.Label;
导入javafx.scene.input.MouseButton;
导入javafx.scene.input.MouseEvent;
导入javafx.scene.layout.Pane;
导入javafx.scene.layout.StackPane;
导入javafx.scene.paint.Color;
导入javafx.scene.shape.Circle;
导入javafx.stage.stage;
/**
*
*@作者sarcan
*/
公共类SampleApp扩展了应用程序{
公共类样本图扩展了区域图{
公共样本图表(){
super(newnumberaxis(),newnumberaxis());
getXAxis().setLabel(“X”);
getYAxis().setLabel(“Y”);
最终系列数据=新系列();
data.setName(“虚拟数据”);
data.getData().addAll(
新数据(0,4),
新数据(1,5),
新数据(2,6),
新数据(3,5),
新数据(4,5),
新数据(5,7),
新数据(6,8),
新数据(7,9),
新数据(8,7)
);
getData()。添加(数据);
}
}
公共类ChartAnnotationNode{
私有最终节点_节点;
私人双x;
私人双人房;
公共图表注释节点(最终节点节点、最终双x、最终双y){
_节点=节点;
_x=x;
_y=y;
}
公共节点getNode(){
返回_节点;
}
公共双getX(){
返回x;
}
公共双盖{
返回y;
}
公共无效集合x(最终双x){
_x=x;
}
公共无效setY(最终双y){
_y=y;
}
}
公共类ChartAnnotationOverlay扩展窗格{
私有ObservableList注释节点;
私有XYChart \u图;
公共图表注释覆盖(最终XYChart图表){
_图表=图表;
/*创建一个列表来保存注释*/
_annotationNodes=FXCollections.observableArrayList();
/*这将是我们的更新侦听器,在添加图表更改或注释时调用*/
final InvalizationListener listener=新的InvalizationListener(){
@凌驾
公共无效(最终可观测){
更新();
}
};
_chart.needsLayoutProperty().addListener(listener);
_annotationNodes.addListener(listener);
/*通过按住shift键并单击添加新批注*/
setOnMouseClicked(新事件处理程序(){
@凌驾
公共无效句柄(最终MouseEvent MouseEvent){
if(mouseEvent.getButton()==MouseButton.PRIMARY&&mouseEvent.isShiftDown())
addAnnotation(mouseEvent.getX(),mouseEvent.getY());
}
});
}
/**
*每当图表更改或添加注释时调用。这基本上会重新显示注释节点。
*/
私有void更新(){
getChildren().clear();
最终轴xAxis=_chart.getXAxis();
最终轴yAxis=_chart.getYAxis();
/*对于每个注释,添加一个圆圈,指示位置及其旁边的自定义节点*/
对于(图表注释节点注释:_注释节点){
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();
最终循环指示器=新循环(3);
指示器。设定行程(颜色为蓝紫色);
指示器。setCenterX(x);
指示器。设置中心y(y);
getChildren().add(指示符);
最终节点=annotation.getNode();
getChildren().add(节点);
节点重新定位(x+10,y-节点预高度(整数最大值)/2);
node.autosize();
}
}
/**
*为给定的显示坐标添加新注释。
*/
私有void addAnnotation(最终双显示X,最终双显示Y){
最终轴xAxis=_chart.getXAxis();
最终轴yAxis=_chart.getYAxis();
最终的双精度x=(xAxis.getValueForDisplay(xAxis.parentToLocal(displayX,0.getX()-_chart.getPadding().getLeft()).doubleValue();
最终双y=(yAxis.getValueForDisplay(yAxis.parentToLocal(0,display).getY()-\u chart.getPadding().getTop()).doubleValue();
if(x轴isValueOnAxis(x)和&yAxis.isValueOnAxis(y))
_添加(新图表AnnotationNode(新标签(“Annotation”+System.currentTimeMillis()),x,y));
}
}
@凌驾
public void start(final Stage)引发异常{
最终样本图表=新样本图表();
最终ChartAnnotationOverlay=新的ChartAnnotationOverlay(图表);
最终StackPane StackPane=新StackPane();
stackPane.getChildren().addAll(图表、覆盖);
最终场景=新场景(stackPane);
舞台场景;
舞台布景宽度(800);
舞台设置高度(600);
stage.show();
}
公共静态void main(字符串[]args){
应用程序启动(args);
}
}
1)我首先将图表放在堆栈窗格中。在图表的顶部,我会放置一个锚定窗格,鼠标单击后,该窗格将保存文本字段

2) 当用户单击图表时,我会使用图表的轴来确定单击是否在内部
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));
    }
}
public class SampleApp extends Application {
    @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);
    }
}