1

我对 JavaFX 和 FXML 还很陌生。我编写了一些 java swing 代码,但那是很久以前的事了。为了学习新东西,我正在创建一个小棋盘游戏,但我似乎无法将我的 GridPane 与其中的矩形正确对齐(GridPane 在 BorderPane 内)。我的意思是(我相信)我的 GridPane 没有正确绑定。正如您在我的屏幕截图中看到的那样,当我调整窗口大小时,GridPane 不会随 BorderPane 一起移动。

这些是我的课:

主要的

public class Main extends Application {

    @Override
    public void start(Stage primaryStage) throws Exception{
        BorderPane root = FXMLLoader.load(getClass().getResource("sample.fxml"));
        Scene scene = new Scene(root, 800, 900);

        primaryStage.setTitle("Testing");
        primaryStage.setScene(scene);
        primaryStage.show();
        primaryStage.toFront();
    }

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

控制器:

public class Controller implements Initializable {


    @FXML private GridPane gridBoard;
    @FXML private BorderPane borderPane;


    public void initialize(java.net.URL location,
                       java.util.ResourceBundle resources) {

        gridBoard.prefHeightProperty().bind(borderPane.heightProperty());
        gridBoard.prefWidthProperty().bind(borderPane.widthProperty());

    }

    public void fillBoardEvent(ActionEvent event) {

        for(int i = 0; i < 50; i++) {
            for(int j = 0; j < 50; j++) {
                InitiateCells n;

                // This is for creating the rectangles
                // and to give some specific cells 
                // different color
                if(i == 24) {
                    if(j == 19 || j == 20 || j == 21 || j == 22 || j == 23 || j == 24 || j == 25 || j == 26 || j == 27 ||
                        j == 28 || j == 29) {

                        n = new InitiateCells("" + i + "/" + j, 12, 12, i, j, 0);

                    } else {
                        n = new InitiateCells("" + i + "/" + j, 12, 12, i, j);
                    }
                } else {
                    n = new InitiateCells("" + i + "/" + j, 12, 12, i, j);
                }
            }
        }

    }

    public void exitEvent(ActionEvent event) {
        System.exit(0);
    }

    public class InitiateCells extends Rectangle {
        private String name;
        private double width;
        private double height;


        public InitiateCells(String name, double width, double height, int rowIndex, int columnIndex) {
            super(width, height);
            this.name = name;
            this.width = width;
            this.height = height;

            setFill(Color.web("#282828"));
            setStroke(Color.web("#3b3b3b"));
            setStrokeType(StrokeType.OUTSIDE);
            setStrokeWidth(2.0);


            gridBoard.add(this, columnIndex, rowIndex);

    }


        public InitiateCells(String name, double width, double height, int rowIndex, int columnIndex, int value) {
            super(width, height);
            this.name = name;
            this.width = width;
            this.height = height;

            setFill(Color.web("#282828"));
            setStroke(Color.web("#3b3b3b"));
            setStrokeType(StrokeType.OUTSIDE);
            setStrokeWidth(2.0);


            gridBoard.add(this, columnIndex, rowIndex);
    }

示例.fxml

<BorderPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="800.0"
        prefWidth="800.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1"
        fx:controller="sample.Controller" fx:id="borderPane">


    <center>
        <GridPane prefHeight="770.0" prefWidth="800.0" BorderPane.alignment="CENTER" fx:id="gridBoard" >
            <children>

            </children>
        </GridPane>
    </center>

    <top>
        <VBox prefHeight="30.0" prefWidth="800.0" BorderPane.alignment="TOP_CENTER">
            <children>
                <MenuBar>
                    <menus>
                        <Menu text="File">
                            <items>
                                <MenuItem text="New Game" onAction="#fillBoardEvent"/>
                                <MenuItem text="Save as GIF"/>
                                <MenuItem text="Export statistics"/>
                                <MenuItem text="Exit" onAction="#exitEvent"/>
                            </items>
                        </Menu>
                        <Menu text="Help">
                            <items>
                                <MenuItem text="Game of Life"/>
                                <MenuItem text="How to play"/>
                                <MenuItem text="Open Javadoc"/>
                            </items>
                        </Menu>
                        <Menu text="About">
                            <MenuItem text="Game of Life"/>
                            <MenuItem text="How to play"/>
                            <MenuItem text="Open Javadoc"/>
                        </Menu>
                    </menus>
                </MenuBar>
            </children>
        </VBox>
    </top>

    <bottom>
        <VBox prefHeight="70.0" prefWidth="800.0" BorderPane.alignment="BOTTOM_CENTER">
            <children>
                <ProgressBar prefHeight="70.0" prefWidth="800.0" progress="50.0" />
            </children>
        </VBox>
    </bottom>
</BorderPane>

这就是问题; 当我尝试调整窗口大小时,我的 GridPane 和 VBox 保持在同一个位置。当我调整窗口大小时,它应该从边到边。这是它的外观: 木板

4

1 回答 1

3

问题不在于网格窗格没有调整大小:问题在于当网格窗格调整大小时,列和行没有调整大小。因此,网格窗格在列占用的水平空间和行占用的垂直空间之后有很多空白空间。(这也解释了为什么它没有居中显示:网格窗格本身在边框窗格中居中,但行和列出现在网格窗格本身的左上角。)

您可以通过在网格窗格上设置列约束和行约束来轻松解决此问题:

public void fillBoardEvent(ActionEvent event) {

    int numRows = 50 ;
    int numColumns = 50 ;

    for (int i = 0 ; i < numRows; i++) {
        RowConstraints row = new RowConstraints();
        row.setVgrow(Priority.ALWAYS);
        gridBoard.getRowConstraints().add(row);
    }

    for (int j = 0 ; j < numColumns; j++) {
        ColumnConstraints col = new ColumnConstraints();
        col.setHgrow(Priority.ALWAYS);
        gridBoard.getColumnConstraints().add(col);            
    }

    for(int i = 0; i < numRows; i++) {
        for(int j = 0; j < numColumns; j++) {
            InitiateCells n;

            // code as before...
        }
    }
}

现在列和行会增长,但它们的内容不会。所以你最终在单元格之间有这样的空间:

在此处输入图像描述

使用 s 无法真正轻松解决此问题Rectangle,因为Rectangles 不可调整大小,因此无论您在网格窗格上设置什么设置,它都无法为您调整矩形大小。(您可以在网格窗格的大小和矩形的宽度和高度之间引入绑定,但这会很快变得非常难看。)我会使用Regions 而不是Rectangles,因为Regions 可以调整大小。请注意,您指定为单元格宽度和高度的值实际上是首选宽度和高度,因为您希望它们随窗口调整大小。

ARegion没有fillstroke,但它可以通过 CSS 设置样式,所以我会这样做

public class InitiateCells extends Region {
    private String name;
    private double width;
    private double height;


    public InitiateCells(String name, double width, double height, int rowIndex, int columnIndex) {
        this.name = name;
        this.width = width;
        this.height = height;

        setPrefSize(width, height);
        getStyleClass().add("board-cell");

        gridBoard.add(this, columnIndex, rowIndex);

    }


    public InitiateCells(String name, double width, double height, int rowIndex, int columnIndex, int value) {
        this(name, width, height, rowIndex, columnIndex);
        pseudoClassStateUpdated(PseudoClass.getPseudoClass("on"), true);
    }

}

现在在你的主类中,添加一个外部样式表:

scene.getStylesheets().add(getClass().getResource("board-style.css").toExternalForm());

并添加一个 board-style.css 文件

.board-cell {
    -fx-background-color: #3b3b3b, #282828 ;
    -fx-background-insets: 0, 2 ;
}

.board-cell:on {
    -fx-background-color: #3b3b3b, white ;
    -fx-background-insets: 0, 2 ;   
}
于 2016-02-04T19:25:51.917 回答