有没有办法管理多个阶段（彼此独立）的 z 索引排序。比如，假设有三个阶段 A、B
下面是我所期待的快速演示。我需要访问任何阶段(拖动或修改)，但z顺序需要保持。非常感谢任何想法或帮助。
import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import java.util.HashMap;
import java.util.Map;
public class StagesZOrdering_Demo extends Application {
private Map<String, Stage> stages = new HashMap<>();
@Override
public void start(Stage stage) throws Exception {
Button button1 = new Button("Back");
button1.setOnAction(e -> openStage("Back"));
Button button2 = new Button("Middle");
button2.setOnAction(e -> openStage("Middle"));
Button button3 = new Button("Front");
button3.setOnAction(e -> openStage("Front"));
VBox root = new VBox(button1, button2, button3);
root.setAlignment(Pos.CENTER);
root.setSpacing(10);
Scene sc = new Scene(root, 200, 200);
stage.setScene(sc);
stage.show();
}
private void openStage(String title) {
if (stages.get(title) != null) {
stages.get(title).requestFocus();
} else {
Stage stg = new Stage();
stg.setTitle(title);
stg.setScene(new Scene(new StackPane(), 300, 300, Color.GRAY));
stg.show();
stg.setOnHidden(e -> stages.remove(title));
stages.put(title, stg);
}
}
public static void main(String... a) {
Application.launch(a);
}
}
下面的mcve演示了一旦从一个ROOT＜code＞MOUSE_EXITED_TARGET＜/code＞事件触发，从后到前阶段的重新排序
这是一个简单但有限的解决方案：
import javafx.application.Application;
import javafx.event.Event;
import javafx.event.EventType;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
public class StagesZOrdering_Demo extends Application {
public enum STAGES {BACK, MIDDLE, FRONT;}
private final EnumMap<STAGES, Stage> stages = new EnumMap<>(STAGES.class);
@Override
public void start(Stage stage) throws Exception {
VBox root = new VBox();
for(STAGES s : STAGES.values()){
Button button = new Button(s.name());
button.setOnAction(e -> openStage(s));
root.getChildren().add(button);
}
root.setAlignment(Pos.CENTER);
root.setSpacing(10);
Scene sc = new Scene(root, 200, 200);
stage.setScene(sc);
stage.show();
}
private void openStage(STAGES s) {
if (stages.get(s) == null) {
Stage stg = new Stage();
stg.setTitle(s.name());
stg.addEventHandler(EventType.ROOT, e->reOrder(e));
stg.setScene(new Scene(new StackPane(), 300, 100, Color.GRAY));
stg.show();
stg.setOnHidden(e -> stages.remove(s));
stages.put(s, stg);
}
}
private void reOrder(Event e){
if(! e.getEventType().getName().equals("MOUSE_EXITED_TARGET"))
return;
for(STAGES s : STAGES.values()){
Stage stage = stages.get(s);
if(stage != null) {
stage.requestFocus();
}
}
}
public static void main(String... a) {
Application.launch(a);
}
}
