该程序产生一个图表,并显示当鼠标通过更换点用于标签进入绘制点的坐标值。
但问题是,如果点是在图表的边框标签不完全出现。
我没能解决使用toFront()
和toBack()
功能这一问题。
我的代码改编自这个问题的答案JavaFX的线型图哈弗值,具有相同的错误。
chart.Java
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.chart.LineChart;
import javafx.scene.chart.NumberAxis;
import javafx.scene.chart.XYChart;
import javafx.stage.Stage;
public class Chart extends Application {
@Override
public void start(Stage stage) {
// Random chart
// Defining the Axis
final NumberAxis xAxis = new NumberAxis();
final NumberAxis yAxis = new NumberAxis();
// Creating the chart
LineChart<Number, Number> lineChart = new LineChart(xAxis, yAxis);
// This didn't solve the bug
xAxis.toBack();
yAxis.toBack();
// Preparing the series
XYChart.Series series = new XYChart.Series();
series.setName("Chart");
for (double x = 0; x <= 10; x++) {
double y = Math.random() * 100;
XYChart.Data chartData;
chartData = new XYChart.Data(x, y);
chartData.setNode(new ShowCoordinatesNode(x, y));
series.getData().add(chartData);
}
// Adding series to chart
lineChart.getData().add(series);
Scene scene = new Scene(lineChart, 800, 600);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}
show coordinates node.Java
import java.text.DecimalFormat;
import javafx.event.EventHandler;
import javafx.scene.Cursor;
import javafx.scene.control.Label;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.StackPane;
public class ShowCoordinatesNode extends StackPane {
public ShowCoordinatesNode(double x, double y) {
final Label label = createDataThresholdLabel(x, y);
setOnMouseEntered(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent mouseEvent) {
setScaleX(1);
setScaleY(1);
getChildren().setAll(label);
setCursor(Cursor.NONE);
toFront(); // This didn't solve the bug
}
});
setOnMouseExited(new EventHandler<MouseEvent>() {
@Override
public void handle(MouseEvent mouseEvent) {
getChildren().clear();
setCursor(Cursor.CROSSHAIR);
}
});
}
private Label createDataThresholdLabel(double x, double y) {
DecimalFormat df = new DecimalFormat("0.##");
final Label label = new Label("(" + df.format(x) + "; " + df.format(y) + ")");
label.getStyleClass().addAll("default-color0", "chart-line-symbol", "chart-series-line");
label.setStyle("-fx-font-size: 10; -fx-font-weight: bold;");
label.setMinSize(Label.USE_PREF_SIZE, Label.USE_PREF_SIZE);
label.setId("show-coord-label");
return label;
}
}
我已经做了一些搜索试图让这项工作,并toFront不作为的Javadoc国合作的原因
在Z顺序的方面移动这个节点被其兄弟节点的前面。这是由这个节点移动到其父的内容ObservableList最后的位置来实现的。此功能没有影响,如果这个节点不是组的一部分。
所以我不能得到这在任何意义上的工作。这是唯一的解决方案,我可以想出它涉及搞清楚标签/ 2的宽度/高度,并且如果它在X轴或Y轴移动所述标签,以便你能看到它
我做的主要没有其他的变化不是硬编码测试值并删除toFront电话
public class Main extends Application {
@Override
public void start(Stage stage) throws Exception{
// Random chart
// Defining the Axis
final NumberAxis xAxis = new NumberAxis();
final NumberAxis yAxis = new NumberAxis();
// Creating the chart
LineChart<Number, Number> lineChart = new LineChart<>(xAxis, yAxis);
// Preparing the series
XYChart.Series series = new XYChart.Series();
series.setName("Chart");
boolean firstRun = true;//First point at 0,0 to test
for (double x = 0; x <= 10; x++) {
double y;
if(firstRun) {
y = 0.0;
firstRun = false;
}else
y = Math.random() * 100;
XYChart.Data chartData;
chartData = new XYChart.Data<>(x, y);
chartData.setNode(new ShowCoordinatesNode(x, y));
series.getData().add(chartData);
}
// Adding series to chart
lineChart.getData().add(series);
Scene scene = new Scene(lineChart, 800, 600);
stage.setScene(scene);
stage.show();
}
public static void main(String[] args) { launch(args); }
}
这里是我加2 if语句如果在轴系一个标签翻译
public class ShowCoordinatesNode extends StackPane {
public ShowCoordinatesNode(double x, double y) {
final Label label = createDataThresholdLabel(x, y);
setOnMouseEntered(mouseEvent -> {
setScaleX(1);
setScaleY(1);
getChildren().setAll(label);
if(x == 0.0) {
applyCss();
layout();
label.setTranslateX(label.getWidth()/2);
}
if(y == 0.0){
applyCss();
layout();
label.setTranslateY(-label.getHeight()/2);
}
setCursor(Cursor.NONE);
});
setOnMouseExited(mouseEvent -> {
getChildren().clear();
setCursor(Cursor.CROSSHAIR);
});
}
private Label createDataThresholdLabel(double x, double y) {
DecimalFormat df = new DecimalFormat("0.##");
final Label label = new Label("(" + df.format(x) + "; " + df.format(y) + ")");
label.getStyleClass().addAll("default-color0", "chart-line-symbol", "chart-series-line");
label.setStyle("-fx-font-size: 10; -fx-font-weight: bold;");
label.setMinSize(Label.USE_PREF_SIZE, Label.USE_PREF_SIZE);
label.setId("show-coord-label");
return label;
}
}
我用的是applyCSS()之前,它被添加到窗口的JavaDoc的状态来计算标签的大小:
如果需要,将样式应用到该节点和它的孩子,如果有的话。此方法通常不需要直接调用,而是可以结合Parent.layout(使用)尺寸节点的下一个脉冲之前,或者如果场景是不是在舞台上。