Quando seleciono uma região do gráfico, meu zoom recebe um "pequeno interruptor". No exemplo, se selecionar do tick 3 até o tick 6, obtenho como limite inferior: 3.67 e limite superior 6.74.
Como corrigi-lo ?
Qualquer ajuda realmente apreciada.
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);
}
}
Respostas:
5 para resposta № 1Você anexou o evento do mouse a Scene. assim mouseEvent.getX() dá-lhe coordenadas relativas à cena. Mas a sua fórmula usa-as como coordenadas relativas a xAxis nó. Você precisa levar em conta xAxis localização na cena.
Introduza o próximo método:
// 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;
}
e mude seus cálculos de acordo:
double xAxisShift = getSceneShift(xAxis);
newXlower = ((rectinitX.get() - xAxisShift) / Tgap) + xAxis.getLowerBound();
newXupper = ((rectX.get() - xAxisShift) / Tgap) + xAxis.getLowerBound();