问题

我有一个JavaFX应用程序，我想知道如何禁用可调整大小的选项，但不禁用最大化按钮，因为我可能需要将窗口最大化。

我正在使用以下代码片段：

stage.setResizable(false);

stage.setResizable (false);

答案1

得分: 2

这个解决方案并不是很优雅或者说不是"干净的代码"，但至少它是有效的：

你可以通过为舞台设置最小和最大尺寸，并将两个尺寸设为相同的值来实现。这将导致窗口在用户尝试调整大小时保持不变。但是因为 resizable 属性仍然设置为 true，所以最大化按钮仍然是可用的。不幸的是，最大化的窗口也会具有您输入的最大尺寸，所以它不会真正地最大化。要修复这个问题，你需要在窗口最大化后立即从舞台中移除最大尺寸（这是解决方案中不太美观的部分）。

你可以像这样实现：

import javafx.application.Application;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;

public class MaximizableButNotResizableExample extends Application {
    
    public static final int WIDTH = 600;
    public static final int HEIGHT = 400;
    
    //flag that indicates the window is re-maximized by the application (to prevent setting the maximum size when un-maximizing the stage)
    private boolean reMaximize = false;
    
    public static void main(String[] args) {
        launch(args);
    }
    
    @Override
    public void start(Stage primaryStage) {
        try {
            Parent root = new AnchorPane();
            Scene scene = new Scene(root, WIDTH, HEIGHT);
            primaryStage.setScene(scene);
            primaryStage.show();
            
            //set the stages maximum and minimum size so it can't be resized
            primaryStage.setMinWidth(WIDTH);
            primaryStage.setMaxWidth(WIDTH);
            primaryStage.setMinHeight(HEIGHT);
            primaryStage.setMaxHeight(HEIGHT);
            
            //add a listener to the maximized property to disable the maximum size of the window when it gets maximized
            primaryStage.maximizedProperty().addListener((observer, oldVal, newVal) -> {
                if (newVal) {
                    //remove the maximum size when maximizing the stage
                    primaryStage.setMaxWidth(Integer.MAX_VALUE);
                    primaryStage.setMaxHeight(Integer.MAX_VALUE);
                    if (!reMaximize) {
                        //re-maximize the stage programmatically to make it realize there is no maximum size anymore
                        reMaximize = true;
                        primaryStage.setMaximized(false);
                        primaryStage.setMaximized(true);
                    }
                    reMaximize = false;
                }
                else {
                    //set the maximum size only if the un-maximize was caused by the user
                    if (!reMaximize) {
                        primaryStage.setMaxWidth(WIDTH);
                        primaryStage.setMaxHeight(HEIGHT);
                    }
                }
            });
        }
        catch (Exception e) {
            e.printStackTrace();
        }
    }
}

我真诚地希望 JavaFX 能够有一个更好的解决方案来处理这个问题，我可能只是还没有发现它。但如果没有的话，这个解决方法也应该能够满足需求。

import javafx.application.Application;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.stage.Stage;
public class MaximizableButNotResizableExample extends Application {
public static final int WIDTH = 600;
public static final int HEIGHT = 400;
//flag that indicates the window is re-maximized by the application (to prevent setting the maximum size when un-maximizing the stage)
private boolean reMaximize = false;
public static void main(String[] args) {
launch(args);
}
@Override
public void start(Stage primaryStage) {
try {
Parent root = new AnchorPane();
Scene scene = new Scene(root, WIDTH, HEIGHT);
primaryStage.setScene(scene);
primaryStage.show();
//set the stages maximum and minimum size so it can't be resized
primaryStage.setMinWidth(WIDTH);
primaryStage.setMaxWidth(WIDTH);
primaryStage.setMinHeight(HEIGHT);
primaryStage.setMaxHeight(HEIGHT);
//add a listener to the maximized property to disable the maximum size of the window when it gets maximized
primaryStage.maximizedProperty().addListener((observer, oldVal, newVal) -> {
if (newVal) {
//remove the maximum size when maximizing the stage
primaryStage.setMaxWidth(Integer.MAX_VALUE);
primaryStage.setMaxHeight(Integer.MAX_VALUE);
if (!reMaximize) {
//re-maximize the stage programmatically to make it realize there is no maximum size anymore
reMaximize = true;
primaryStage.setMaximized(false);
primaryStage.setMaximized(true);
}
reMaximize = false;
}
else {
//set the maximum size only if the un-maximize was caused by the user
if (!reMaximize) {
primaryStage.setMaxWidth(WIDTH);
primaryStage.setMaxHeight(HEIGHT);
}
}
});
}
catch (Exception e) {
e.printStackTrace();
}
}
}