Javafx 2 Diagramm zoomen - zoomen, javafx-2

Wenn ich eine Diagrammregion auswähle, bekomme ich einen kleinen "Zoom". Im Beispiel, wenn ich von Tick 3 bis Tick 6 wähle, erhalte ich als untere Grenze: 3,67 und obere Grenze 6,74.

Wie man es repariert ?

Jede Hilfe wurde wirklich geschätzt.

package testjavafxzoom;

import javafx.application.Application;
import javafx.beans.property.SimpleDoubleProperty;
import javafx.event.EventHandler;
import javafx.scene.chart.CategoryAxis;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.chart.LineChart;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.LineTo;
import javafx.scene.shape.MoveTo;
import javafx.scene.shape.Path;
import javafx.scene.shape.Rectangle;

public class Zoom01 extends Application {

Path path;//Add path for freehand
BorderPane pane;
Rectangle rect;
SimpleDoubleProperty rectinitX = new SimpleDoubleProperty();
SimpleDoubleProperty rectinitY = new SimpleDoubleProperty();
SimpleDoubleProperty rectX = new SimpleDoubleProperty();
SimpleDoubleProperty rectY = new SimpleDoubleProperty();

@Override
public void start(Stage stage) {

System.out.println("Java Version             : " + com.sun.javafx.runtime.VersionInfo.getVersion());
System.out.println("Java getHudsonBuildNumber: " + com.sun.javafx.runtime.VersionInfo.getHudsonBuildNumber());
System.out.println("Java getReleaseMilestone : " + com.sun.javafx.runtime.VersionInfo.getReleaseMilestone());
System.out.println("Java getRuntimeVersion   : " + com.sun.javafx.runtime.VersionInfo.getRuntimeVersion());

stage.setTitle("Lines plot");

//final CategoryAxis xAxis = new CategoryAxis();
final NumberAxis xAxis = new NumberAxis(1, 12, 1);
final NumberAxis yAxis = new NumberAxis(0.53000, 0.53910, 0.0005);

yAxis.setTickLabelFormatter(new NumberAxis.DefaultFormatter(yAxis) {

@Override
public String toString(Number object) {
return String.format("%7.5f", object);
}
});


//final LineChart<String, Number> lineChart = new LineChart<String, Number>(xAxis, yAxis);
final LineChart<Number, Number> lineChart = new LineChart<Number, Number>(xAxis, yAxis);

//lineChart.setTitle("Stock quotes");
lineChart.setCreateSymbols(false);
lineChart.setAlternativeRowFillVisible(false);
lineChart.setAnimated(true);

XYChart.Series series1 = new XYChart.Series();
//series1.setName("Stock 1");
series1.getData().add(new XYChart.Data(1, 0.53185));
series1.getData().add(new XYChart.Data(2, 0.532235));
series1.getData().add(new XYChart.Data(3, 0.53234));
series1.getData().add(new XYChart.Data(4, 0.538765));
series1.getData().add(new XYChart.Data(5, 0.53442));
series1.getData().add(new XYChart.Data(6, 0.534658));
series1.getData().add(new XYChart.Data(7, 0.53023));
series1.getData().add(new XYChart.Data(8, 0.53001));
series1.getData().add(new XYChart.Data(9, 0.53589));
series1.getData().add(new XYChart.Data(10, 0.53476));
series1.getData().add(new XYChart.Data(11, 0.530123));
series1.getData().add(new XYChart.Data(12, 0.53035));


pane = new BorderPane();
pane.setCenter(lineChart);
//Scene scene = new Scene(lineChart, 800, 600);
Scene scene = new Scene(pane, 800, 600);
lineChart.getData().addAll(series1);

stage.setScene(scene);

path = new Path();
path.setStrokeWidth(1);
path.setStroke(Color.BLACK);

scene.setOnMouseClicked(mouseHandler);
scene.setOnMouseDragged(mouseHandler);
scene.setOnMouseEntered(mouseHandler);
scene.setOnMouseExited(mouseHandler);
scene.setOnMouseMoved(mouseHandler);
scene.setOnMousePressed(mouseHandler);
scene.setOnMouseReleased(mouseHandler);

//root.getChildren().add(lineChart);
pane.getChildren().add(path);

rect = new Rectangle();
rect.setFill(Color.web("blue", 0.1));
rect.setStroke(Color.BLUE);
rect.setStrokeDashOffset(50);

rect.widthProperty().bind(rectX.subtract(rectinitX));
rect.heightProperty().bind(rectY.subtract(rectinitY));
pane.getChildren().add(rect);

stage.show();
}
EventHandler<MouseEvent> mouseHandler = new EventHandler<MouseEvent>() {

@Override
public void handle(MouseEvent mouseEvent) {

if (mouseEvent.getEventType() == MouseEvent.MOUSE_PRESSED) {
rect.setX(mouseEvent.getX());
rect.setY(mouseEvent.getY());
rectinitX.set(mouseEvent.getX());
rectinitY.set(mouseEvent.getY());
} else if (mouseEvent.getEventType() == MouseEvent.MOUSE_DRAGGED) {
rectX.set(mouseEvent.getX());
rectY.set(mouseEvent.getY());
} else if (mouseEvent.getEventType() == MouseEvent.MOUSE_RELEASED) {

System.out.println("Zoom bounds : [" + rectinitX.get()+", "+rectinitY.get()+"] ["+ rectX.get()+", "+rectY.get()+"]");
System.out.println("TODO: Determine bound ranges according these zoom coordinates.n");

// TODO: Determine bound ranges according this zoom coordinates.
//LineChart<String, Number> lineChart = (LineChart<String, Number>) pane.getCenter();
LineChart<Number, Number> lineChart = (LineChart<Number, Number>) pane.getCenter();

// Zoom in Y-axis by changing bound range.
NumberAxis yAxis = (NumberAxis) lineChart.getYAxis();
yAxis.setLowerBound(0.532);
yAxis.setUpperBound(0.538);

// Zoom in X-axis by removing first and last data values.
// Note: Maybe better if categoryaxis is replaced by numberaxis then setting the
// LowerBound and UpperBound will be avaliable.
/*
XYChart.Series series1 = lineChart.getData().get(0);
if (!series1.getData().isEmpty()) {
series1.getData().remove(0);
series1.getData().remove(series1.getData().size() - 1);
}
*/

NumberAxis xAxis = (NumberAxis) lineChart.getXAxis();
System.out.println("(a) xAxis.getLowerBound() "+xAxis.getLowerBound()+" "+xAxis.getUpperBound());
double Tgap = xAxis.getWidth()/(xAxis.getUpperBound() - xAxis.getLowerBound());
double newXlower, newXupper;
newXlower = (rectinitX.get()/Tgap)+xAxis.getLowerBound();

newXupper = (rectX.get()/Tgap)+xAxis.getLowerBound();
if (newXupper > xAxis.getUpperBound())
newXupper = xAxis.getUpperBound();

xAxis.setLowerBound( newXlower );
xAxis.setUpperBound( newXupper );

System.out.println("(b) xAxis.getLowerBound() "+xAxis.getLowerBound()+" "+xAxis.getUpperBound());

// Hide the rectangle
rectX.set(0);
rectY.set(0);
}
}
};

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

Antworten:

Sie haben Mausereignis an Szene angefügt. Damit mouseEvent.getX() gibt Ihnen Koordinaten relativ zur Szene. Aber Ihre Formel verwendet sie als Koordinaten relativ zu xAxis Knoten. Sie müssen berücksichtigen xAxis Standort auf der Szene.

Einführung der nächsten Methode:

// summ layout shift against parent until we ascend to scene
private static double getSceneShift(Node node) {
double shift = 0;
do {
shift += node.getLayoutX();
node = node.getParent();
} while (node != null);
return shift;
}

und ändere deine Berechnungen entsprechend:

        double xAxisShift = getSceneShift(xAxis);
newXlower = ((rectinitX.get() - xAxisShift) / Tgap) + xAxis.getLowerBound();
newXupper = ((rectX.get() - xAxisShift) / Tgap) + xAxis.getLowerBound();