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:
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:
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Region
,fill
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());