JavaFX 按钮取消选择

Question

我正在尝试使用 JavaFX 使用按钮作为像素来制作 sprite editor。我可以在按下时更改每个按钮的颜色，但我正在尝试获取它，所以如果我单击并拖动我可以绘制多个像素。

我发现的问题是，单击并按住按钮后，当我将鼠标移到新按钮上以选择该按钮时，我无法选择新按钮。如果我单击并拖动重新输入该按钮，我可以得到“Paint Dragged Pixel”调试消息，但如果我在鼠标按下的情况下输入一个新像素，这就是我想要的。当鼠标进入任何按钮时，我也可以让像素按钮打印“输入的像素”，但当我单击并拖动到新像素时则不行。

我认为问题在于，当我单击一个像素时，我被锁定，无法通过将鼠标悬停在新像素上来选择新像素。有没有办法取消绑定这个选择，还是问题不同。

主要应用：

public class Main extends Application {


boolean mousePressed = false;
public boolean isMousePressed() {
    return mousePressed;
}


@Override
public void start(Stage primaryStage) throws Exception{

    BorderPane borderPane = new BorderPane();
    primaryStage.setTitle("SpriteSheet");
    Group root = new Group();
    Scene scene = new Scene(borderPane, 500,200);
    scene.setFill(Color.BLACK);

    primaryStage.setScene(scene);
    GridPane gridPane = new GridPane();
    borderPane.setCenter(root);

    for(int x = 0; x < 10; x++)
    {
        for(int y = 0; y < 10; y++) {
            PixelButton button = new PixelButton();
            button.setParentMain(this);

            button.setOnMousePressed(new EventHandler<MouseEvent>() {
                @Override
                public void handle(MouseEvent event) {
                    mousePressed = true;
                    System.out.println("mouseDown");
                }
            });

            button.setOnMouseReleased(new EventHandler<MouseEvent>() {
                @Override
                public void handle(MouseEvent event) {
                    mousePressed = false;
                    System.out.println("mouseUp");
                }
            });

            gridPane.add(button, x, y);
        }
    }

    root.getChildren().add(gridPane);

    primaryStage.show();
}


public static void main(String[] args) {
    launch(args);
}

}

PixelButton 的类。

public class PixelButton extends Button {

Main parentMain;
public void setParentMain(Main parent) {
    parentMain = parent;
}

public PixelButton() {

    this.setMinSize(10, 10);
    this.setPrefSize(10, 10);

    this.setOnMousePressed(new EventHandler<MouseEvent>() {
        @Override
        public void handle(MouseEvent event) {

        }
    });
    this.setOnMouseEntered(new EventHandler<MouseEvent>() {
        @Override
        public void handle(MouseEvent event) {
            System.out.println("Entered Pixel");

            if(parentMain.isMousePressed()){
                System.out.println("Paint Dragged Pixel");
            }
        }
    });
}

}

提前谢谢你。

Answer 1

好的，所以我一直在考虑这个问题，最后想出了一个解决方案从这开始不是您正在寻找的确切功能，但基本上我可以尽可能接近我在鼠标按下时触发一个事件，释放鼠标点击，只要该事件不是来自矩形，那么不要翻转绘画布尔绘画，所以你基本上点击进入“绘画模式”，然后再次点击退出着色砖

public class Main extends Application {    

    private boolean mousePressed;

    @Override
    public void start(Stage primaryStage) throws Exception{
        BorderPane borderPane = new BorderPane();
        primaryStage.setTitle("SpriteSheet");
        Group root = new Group();
        Scene scene = new Scene(borderPane, 500,200);
        //        scene.setFill(Color.BLACK);

        primaryStage.setScene(scene);
        GridPane gridPane = new GridPane();
        borderPane.setCenter(root);

        for(int x = 0; x < 10; x++) {
            for(int y = 0; y < 10; y++) {
                Rectangle rectangle = new Rectangle(10, 10);
                rectangle.setOnMousePressed(event -> {
                    mousePressed = true;
                    System.out.println("mouseDown");
                    rectangle.fireEvent(new MouseEvent(MouseEvent.MOUSE_RELEASED,
                            rectangle.getLayoutX(), rectangle.getLayoutY(), rectangle.getLayoutX(), rectangle.getLayoutY(),
                            MouseButton.PRIMARY, 1,
                            false, false, false, false,
                            false, false, false, false,
                            false, false, null));
                });

                rectangle.setOnMouseReleased(event -> {
                    System.out.println(event.getSource());
                    if(!event.getSource().toString().equals("Rectangle[x=0.0, y=0.0, width=10.0, height=10.0, fill=0x000000ff]")) {
                        mousePressed = false;
                        System.out.println("mouseUp");
                    }
                });

                rectangle.setOnMouseMoved(event -> {
                    if(mousePressed) {
                        rectangle.setFill(Color.BLUE);
                    }
                });

                gridPane.add(rectangle, x, y);
            }
        }
        root.getChildren().add(gridPane);
        primaryStage.show();
    }
    public static void main(String[] args) { launch(args); }
}