Javafx单击一个圆并获取它';s参考
我在舞台上有一组节点,圆圈。 我希望能够单击其中一个并“选择它”(只需获取它的引用,以便我可以移动它,更改颜色等)Javafx单击一个圆并获取它';s参考,java,javafx,Java,Javafx,我在舞台上有一组节点,圆圈。 我希望能够单击其中一个并“选择它”(只需获取它的引用,以便我可以移动它,更改颜色等) 窗格根=新窗格(); root.getChildren().addAll(/*一个圆形对象数组*/); 场景=新场景(根,500,500,背景颜色); scene.setOnMouseClicked(新的EventHandler(){ @凌驾 公共无效句柄(MouseEvent MouseEvent){ //如何获取我单击的圆圈? } }); 舞台。片名(片名); 舞台场景; st
窗格根=新窗格();
root.getChildren().addAll(/*一个圆形对象数组*/);
场景=新场景(根,500,500,背景颜色);
scene.setOnMouseClicked(新的EventHandler(){
@凌驾
公共无效句柄(MouseEvent MouseEvent){
//如何获取我单击的圆圈?
}
});
舞台。片名(片名);
舞台场景;
stage.show();
您可以使用获取参考
可以拖动圆和任何其他节点的示例:
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
Circle circle = new Circle( 100,100,50);
circle.setStroke(Color.BLUE);
circle.setFill(Color.BLUE.deriveColor(1, 1, 1, 0.3));
Rectangle rectangle = new Rectangle( 0,0,100,100);
rectangle.relocate(200, 200);
rectangle.setStroke(Color.GREEN);
rectangle.setFill(Color.GREEN.deriveColor(1, 1, 1, 0.3));
Text text = new Text( "Example Text");
text.relocate(300, 300);
Pane root = new Pane();
root.getChildren().addAll(circle, rectangle, text);
MouseGestures mouseGestures = new MouseGestures();
mouseGestures.makeDraggable(circle);
mouseGestures.makeDraggable(rectangle);
mouseGestures.makeDraggable(text);
Scene scene = new Scene(root, 1024, 768);
primaryStage.setScene(scene);
primaryStage.show();
}
public static class MouseGestures {
class DragContext {
double x;
double y;
}
DragContext dragContext = new DragContext();
public void makeDraggable( Node node) {
node.setOnMousePressed( onMousePressedEventHandler);
node.setOnMouseDragged( onMouseDraggedEventHandler);
node.setOnMouseReleased(onMouseReleasedEventHandler);
}
EventHandler<MouseEvent> onMousePressedEventHandler = event -> {
if( event.getSource() instanceof Circle) {
Circle circle = (Circle) (event.getSource());
dragContext.x = circle.getCenterX() - event.getSceneX();
dragContext.y = circle.getCenterY() - event.getSceneY();
} else {
Node node = (Node) (event.getSource());
dragContext.x = node.getTranslateX() - event.getSceneX();
dragContext.y = node.getTranslateY() - event.getSceneY();
}
};
EventHandler<MouseEvent> onMouseDraggedEventHandler = event -> {
if( event.getSource() instanceof Circle) {
Circle circle = (Circle) (event.getSource());
circle.setCenterX( dragContext.x + event.getSceneX());
circle.setCenterY( dragContext.y + event.getSceneY());
} else {
Node node = (Node) (event.getSource());
node.setTranslateX( dragContext.x + event.getSceneX());
node.setTranslateY( dragContext.y + event.getSceneY());
}
};
EventHandler<MouseEvent> onMouseReleasedEventHandler = event -> {
};
}
public static void main(String[] args) {
launch(args);
}
}
导入javafx.application.application;
导入javafx.event.EventHandler;
导入javafx.scene.Node;
导入javafx.scene.scene;
导入javafx.scene.input.MouseEvent;
导入javafx.scene.layout.Pane;
导入javafx.scene.paint.Color;
导入javafx.scene.shape.Circle;
导入javafx.scene.shape.Rectangle;
导入javafx.scene.text.text;
导入javafx.stage.stage;
公共类主扩展应用程序{
@凌驾
public void start(Stage primaryStage)引发异常{
圆圈=新圆圈(100100,50);
圆圈。设定行程(颜色。蓝色);
圆形。设置填充(颜色。蓝色。衍生颜色(1,1,1,0.3));
矩形矩形=新矩形(0,0100);
矩形。重新定位(200200);
矩形。设定行程(颜色。绿色);
矩形.setFill(Color.GREEN.deriveColor(1,1,1,0.3));
文本文本=新文本(“示例文本”);
文本。重新定位(300300);
窗格根=新窗格();
root.getChildren().addAll(圆形、矩形、文本);
MouseGestures MouseGestures=新的MouseGestures();
鼠标序列。可拖动(圆形);
mouseGestures.makeDraggable(矩形);
mouseGestures.makeDraggable(文本);
场景=新场景(根,1024768);
初级阶段。场景(场景);
primaryStage.show();
}
公共静态类鼠标器{
类DragContext{
双x;
双y;
}
DragContext DragContext=新的DragContext();
公共void makeDraggable(节点){
node.setOnMousePressed(onMousePressedEventHandler);
node.setOnMouseDragged(onMouseDraggedEventHandler);
node.setOnMouseReleased(onMouseReleasedEventHandler);
}
EventHandler onMousePressedEventHandler=事件->{
if(event.getSource()instanceof Circle){
圆圈=(圆圈)(event.getSource());
dragContext.x=circle.getCenterX()-event.getSceneX();
dragContext.y=circle.getCenterY()-event.getSceneY();
}否则{
Node节点=(Node)(event.getSource());
dragContext.x=node.getTranslateX()-event.getSceneX();
dragContext.y=node.getTranslateY()-event.getSceneY();
}
};
EventHandler onMouseDraggedEventHandler=事件->{
if(event.getSource()instanceof Circle){
圆圈=(圆圈)(event.getSource());
circle.setCenterX(dragContext.x+event.getSceneX());
circle.setCenterY(dragContext.y+event.getSceneY());
}否则{
Node节点=(Node)(event.getSource());
setTranslateX(dragContext.x+event.getSceneX());
setTranslateY(dragContext.y+event.getSceneY());
}
};
EventHandler onMouseReleasedEventHandler=事件->{
};
}
公共静态void main(字符串[]args){
发射(args);
}
}
您可以使用获取参考
可以拖动圆和任何其他节点的示例:
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Text;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws Exception {
Circle circle = new Circle( 100,100,50);
circle.setStroke(Color.BLUE);
circle.setFill(Color.BLUE.deriveColor(1, 1, 1, 0.3));
Rectangle rectangle = new Rectangle( 0,0,100,100);
rectangle.relocate(200, 200);
rectangle.setStroke(Color.GREEN);
rectangle.setFill(Color.GREEN.deriveColor(1, 1, 1, 0.3));
Text text = new Text( "Example Text");
text.relocate(300, 300);
Pane root = new Pane();
root.getChildren().addAll(circle, rectangle, text);
MouseGestures mouseGestures = new MouseGestures();
mouseGestures.makeDraggable(circle);
mouseGestures.makeDraggable(rectangle);
mouseGestures.makeDraggable(text);
Scene scene = new Scene(root, 1024, 768);
primaryStage.setScene(scene);
primaryStage.show();
}
public static class MouseGestures {
class DragContext {
double x;
double y;
}
DragContext dragContext = new DragContext();
public void makeDraggable( Node node) {
node.setOnMousePressed( onMousePressedEventHandler);
node.setOnMouseDragged( onMouseDraggedEventHandler);
node.setOnMouseReleased(onMouseReleasedEventHandler);
}
EventHandler<MouseEvent> onMousePressedEventHandler = event -> {
if( event.getSource() instanceof Circle) {
Circle circle = (Circle) (event.getSource());
dragContext.x = circle.getCenterX() - event.getSceneX();
dragContext.y = circle.getCenterY() - event.getSceneY();
} else {
Node node = (Node) (event.getSource());
dragContext.x = node.getTranslateX() - event.getSceneX();
dragContext.y = node.getTranslateY() - event.getSceneY();
}
};
EventHandler<MouseEvent> onMouseDraggedEventHandler = event -> {
if( event.getSource() instanceof Circle) {
Circle circle = (Circle) (event.getSource());
circle.setCenterX( dragContext.x + event.getSceneX());
circle.setCenterY( dragContext.y + event.getSceneY());
} else {
Node node = (Node) (event.getSource());
node.setTranslateX( dragContext.x + event.getSceneX());
node.setTranslateY( dragContext.y + event.getSceneY());
}
};
EventHandler<MouseEvent> onMouseReleasedEventHandler = event -> {
};
}
public static void main(String[] args) {
launch(args);
}
}
导入javafx.application.application;
导入javafx.event.EventHandler;
导入javafx.scene.Node;
导入javafx.scene.scene;
导入javafx.scene.input.MouseEvent;
导入javafx.scene.layout.Pane;
导入javafx.scene.paint.Color;
导入javafx.scene.shape.Circle;
导入javafx.scene.shape.Rectangle;
导入javafx.scene.text.text;
导入javafx.stage.stage;
公共类主扩展应用程序{
@凌驾
public void start(Stage primaryStage)引发异常{
圆圈=新圆圈(100100,50);
圆圈。设定行程(颜色。蓝色);
圆形。设置填充(颜色。蓝色。衍生颜色(1,1,1,0.3));
矩形矩形=新矩形(0,0100);
矩形。重新定位(200200);
矩形。设定行程(颜色。绿色);
矩形.setFill(Color.GREEN.deriveColor(1,1,1,0.3));
文本文本=新文本(“示例文本”);
文本。重新定位(300300);
窗格根=新窗格();
root.getChildren().addAll(圆形、矩形、文本);
MouseGestures MouseGestures=新的MouseGestures();
鼠标序列。可拖动(圆形);
mouseGestures.makeDraggable(矩形);
mouseGestures.makeDraggable(文本);
场景=新场景(根,1024768);
初级阶段。场景(场景);
primaryStage.show();
}
公共静态类鼠标器{
类DragContext{
双x;
双y;
}
DragContext DragContext=新的DragContext();
公共void makeDraggable(节点){
node.setOnMousePressed(onMousePressedEventHandler);
node.setOnMouseDragged(onMouseDraggedEventHandler);
node.setOnMouseReleased(onMouseReleasedEventHandler);
}
EventHandler onMousePressedEventHandler=事件->{
if(event.getSource()instanceof Circle){
圆圈=(圆圈)(event.getSource());
dragContext.x=circle.getCenterX()-event.getSceneX();
dragContext.y=cir
import javafx.application.Application;
import javafx.beans.binding.Bindings;
import javafx.beans.property.ObjectProperty;
import javafx.beans.property.SimpleObjectProperty;
import javafx.css.PseudoClass;
import javafx.geometry.Point2D;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.control.ScrollPane;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.BorderPane;
import javafx.scene.layout.Pane;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Line;
import javafx.stage.Stage;
public class GridOfCircles extends Application {
private static final PseudoClass SELECTED_P_C = PseudoClass.getPseudoClass("selected");
private final int numColumns = 100 ;
private final int numRows = 100 ;
private final double radius = 4 ;
private final double spacing = 2 ;
private final ObjectProperty<Circle> selectedCircle = new SimpleObjectProperty<>();
private final ObjectProperty<Point2D> selectedLocation = new SimpleObjectProperty<>();
@Override
public void start(Stage primaryStage) {
selectedCircle.addListener((obs, oldSelection, newSelection) -> {
if (oldSelection != null) {
oldSelection.pseudoClassStateChanged(SELECTED_P_C, false);
}
if (newSelection != null) {
newSelection.pseudoClassStateChanged(SELECTED_P_C, true);
}
});
Pane grid = new Pane();
for (int x = 0 ; x < numColumns; x++) {
double gridX = x*(spacing + radius + radius) + spacing ;
grid.getChildren().add(new Line(gridX, 0, gridX, numRows*(spacing + radius + radius)));
}
for (int y = 0; y < numRows ; y++) {
double gridY = y*(spacing + radius + radius) + spacing ;
grid.getChildren().add(new Line(0, gridY, numColumns*(spacing + radius + radius), gridY));
}
for (int x = 0 ; x < numColumns; x++) {
for (int y = 0 ;y < numRows ; y++) {
grid.getChildren().add(createCircle(x, y));
}
}
Label label = new Label();
label.textProperty().bind(Bindings.createStringBinding(() -> {
Point2D loc = selectedLocation.get();
if (loc == null) {
return "" ;
}
return String.format("Location: [%.0f, %.0f]", loc.getX(), loc.getY());
}, selectedLocation));
BorderPane root = new BorderPane(new ScrollPane(grid));
root.setTop(label);
Scene scene = new Scene(root);
scene.getStylesheets().add("grid.css");
primaryStage.setScene(scene);
primaryStage.show();
}
private Circle createCircle(int x, int y) {
Circle circle = new Circle();
circle.getStyleClass().add("intersection");
circle.setCenterX(x * (spacing + radius + radius) + spacing);
circle.setCenterY(y * (spacing + radius + radius) + spacing);
circle.setRadius(radius);
circle.addEventHandler(MouseEvent.MOUSE_CLICKED, e -> {
selectedCircle.set(circle);
selectedLocation.set(new Point2D(x, y));
});
return circle ;
}
public static void main(String[] args) {
launch(args);
}
}