允許用戶在明暗模式之間切換 Gluon

Question

我正在開發一個基於 Gluon/JavaFx 的應用程序，我希望允許用戶在明暗模式之間切換。 但是，如您所知，不僅 Gluon mobile dev 中的每個類都沒有 args 參數，而且在明暗之間切換的方法也需要您從主類中傳遞 Scene 場景。 這使得我的明/暗模式切換想法成為一個棘手的編碼。

有人可以幫我嗎？ 我是 Gluon 的新手並且渴望學習:)

編輯：我已經看過javadoc並且知道如何在postInit方法中自己更改它，我要問的是如何允許用戶在應用程序中使用CheckBox 之類的內容更改它。

編輯 1：使用 @JoséPereda 提供的Node::getScene （謝謝！），我的代碼（如下）生成以下錯誤：

Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: Uncompilable source code - Erroneous ctor sym type: javafx.scene.Scene.<init>
at com.mysecondapplication.views.QuaternaryView.<init>(QuaternaryView.java:63)
at com.gluonhq.impl.charm.glisten.util.CachedFactory.get(CachedFactory.java:32)
at com.gluonhq.charm.glisten.application.MobileApplication.doSwitchView(MobileApplication.java:723)
at com.gluonhq.charm.glisten.application.MobileApplication.switchView(MobileApplication.java:477)
at com.gluonhq.charm.glisten.control.NavigationDrawer$ViewItem.lambda$new$0(NavigationDrawer.java:858)
at javafx.base/com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:181)
at javafx.base/com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:80)
at javafx.base/javafx.beans.property.BooleanPropertyBase.fireValueChangedEvent(BooleanPropertyBase.java:104)
at javafx.base/javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanPropertyBase.java:111)
at javafx.base/javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.java:145)
at com.gluonhq.charm.glisten.control.NavigationDrawer$Item.setSelected(NavigationDrawer.java:745)
at com.gluonhq.charm.glisten.control.NavigationDrawer$1.lambda$new$0(NavigationDrawer.java:312)
at javafx.base/com.sun.javafx.binding.ExpressionHelper$SingleChange.fireValueChangedEvent(ExpressionHelper.java:181)
at javafx.base/com.sun.javafx.binding.ExpressionHelper.fireValueChangedEvent(ExpressionHelper.java:80)
at javafx.base/javafx.beans.property.ObjectPropertyBase.fireValueChangedEvent(ObjectPropertyBase.java:106)
at javafx.base/javafx.beans.property.ReadOnlyObjectWrapper.fireValueChangedEvent(ReadOnlyObjectWrapper.java:100)
at javafx.base/javafx.beans.property.ObjectPropertyBase.markInvalid(ObjectPropertyBase.java:113)
at javafx.base/javafx.beans.property.ObjectPropertyBase.set(ObjectPropertyBase.java:147)
at com.gluonhq.charm.glisten.control.NavigationDrawer.setSelectedItem(NavigationDrawer.java:318)
at com.gluonhq.impl.charm.glisten.control.skin.NavigationDrawerSkin.lambda$new$0(NavigationDrawerSkin.java:46)
at javafx.base/com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:247)
at javafx.base/com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:234)
at javafx.base/com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at javafx.base/com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at javafx.base/com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at javafx.base/com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at javafx.base/com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.base/javafx.event.Event.fireEvent(Event.java:198)
at javafx.graphics/javafx.scene.Scene$ClickGenerator.postProcess(Scene.java:3563)
at javafx.graphics/javafx.scene.Scene$MouseHandler.process(Scene.java:3865)
at javafx.graphics/javafx.scene.Scene.processMouseEvent(Scene.java:1851)
at javafx.graphics/javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2584)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:409)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:299)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$2(GlassViewEventHandler.java:447)
at javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:412)
at javafx.graphics/com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:446)
at javafx.graphics/com.sun.glass.ui.View.handleMouseEvent(View.java:556)
at javafx.graphics/com.sun.glass.ui.View.notifyMouse(View.java:942)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
at java.base/java.lang.Thread.run(Thread.java:834)

這是我的代碼：

package com.mysecondapplication.views;

import com.gluonhq.charm.glisten.animation.BounceInRightTransition;
import com.gluonhq.charm.glisten.application.MobileApplication;
import com.gluonhq.charm.glisten.control.AppBar;
import com.gluonhq.charm.glisten.control.BottomNavigation;
import com.gluonhq.charm.glisten.control.FloatingActionButton;
import com.gluonhq.charm.glisten.mvc.View;
import com.mysecondapplication.views.Session;
import com.mysecondapplication.views.Sessions;
import com.gluonhq.charm.glisten.visual.MaterialDesignIcon;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import static com.gluonhq.charm.glisten.visual.Theme.DARK;
import static com.gluonhq.charm.glisten.visual.Theme.LIGHT;
import javafx.geometry.Insets;
import javafx.geometry.Orientation;
import javafx.scene.control.Slider;
import javafx.geometry.Pos;
import javafx.scene.Node;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.CheckBox;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.scene.control.ToggleButton;
import javafx.scene.layout.GridPane;
import javafx.scene.layout.HBox;
import javafx.scene.layout.Pane;
import javafx.scene.layout.VBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Font;
import javafx.scene.text.Text;

public class QuaternaryView extends View {

boolean light = true;
Scene scene;

public QuaternaryView() {

    getStylesheets().add(QuaternaryView.class.getResource("quaternary.css").toExternalForm());

    Font font = new Font("Comfortaa", 15);
    Font font1 = new Font("Comfortaa", 24);
    // Use a GridPane to create a login interface insights 
    VBox grid = new VBox();
    grid.setAlignment(Pos.CENTER);
    grid.setPadding(new Insets(25, 25, 25, 25));
    //grid.setStyle("-fx-background-color: black;");

    Label scenetitle = new Label("Settings");
    scenetitle.setFont(font1);
    //scenetitle.setAlignment(Pos.TOP_LEFT);
    grid.getChildren().add(scenetitle);
    //scenetitle.setStyle("-fx-text-fill: grey;");
    Label h2 = new Label("This code\nis a\nplaceholder.");
    h2.setFont(font);
    //scenetitle.setStyle("-fx-text-fill: grey;");
    Pane mode = mode(Node::getScene);
    grid.getChildren().addAll(h2, mode);
    
    setCenter(grid);
}

// flag boolean based on current setting???

public Pane mode(Scene scene) {
    CheckBox button;
    if(light = true) {
        button = new CheckBox("Dark Mode");
        button.setOnMousePressed( e -> {
            light = false;
            DARK.assignTo(scene);
        });
    } else {
        button = new CheckBox("Light Mode");
        button.setOnMousePressed( e -> {
            light = true;
            LIGHT.assignTo(scene);
        });
    }
    Pane but = new Pane(button);
    return but;
}
@Override
protected void updateAppBar(AppBar appBar) {
    appBar.setNavIcon(MaterialDesignIcon.DRAG_HANDLE.button(e -> `getApplication().getDrawer().open()));`
    appBar.setTitleText("Settings/Appearance");
    }
}

Answer 1

感謝@JoséPereda，這個問題已經得到解決。 對於我的情況，正確的代碼是node.getScene() ，其中 node 可以是任何節點，例如 Pane、Button 等。具體來說，我使用了DARK.assignTo(button.getScene()); .