GridPane未绑定到BorderPane

时间:2016-02-04 18:37:26

标签: java javafx fxml gridpane borderpane

我是JavaFX和FXML的新手。我编写了一些java swing,但这是很久以前的事了。 为了学习新东西,我创建了一个小小的棋盘游戏,但我似乎无法正确地将我的GridPane与矩形排列在一起(GridPane位于BorderPane内)。 我的意思是(我相信)我的GridPane没有正确绑定。正如您在屏幕截图中看到的那样,当我调整窗口大小时,GridPane不会随BorderPane移动。

这些是我的课程:

主要

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);
    }

Sample.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>

这是问题所在;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,它应该从边缘到边缘。 这是它的样子: Board

1 个答案:

答案 0 :(得分:3)

问题不在于网格窗格没有调整大小:问题是当网格窗格调整大小时,列和行不会调整大小。因此,在由列占据的水平空间之后以及在由行占据的垂直空间之后,网格窗格具有大量空白空间。 (这也解释了为什么它没有出现居中:网格窗格本身在边框窗格中居中,但行和列显示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,但内容却不会增长。所以你最终得到了单元格之间的空间:

enter image description here

您无法使用Rectangle轻松解决此问题,因为Rectangle不可调整大小,因此无论您在网格窗格上放置什么设置,它都无法调整大小矩形给你。 (你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Region而不是Rectangle s,因为{{1} } s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大小调整。

Region没有Regionfill等,但它可以通过CSS设置样式,所以我会这样做

stroke

现在在您的主类中,添加一个外部样式表:

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);
    }

}

并添加带有

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