在我的JavaFX程序中，我有多个网格窗格。我的FXML代码在这里。
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.shape.*?>
<?import javafx.geometry.*?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<AnchorPane id="AnchorPane" prefHeight="553.0" prefWidth="586.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="pkg3dtictactoe.FXMLDocumentController">
<children>
<VBox prefHeight="489.0" prefWidth="586.0">
<children>
<MenuBar>
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem id="NewGame" mnemonicParsing="false" onAction="#handleNewGameAction" text="New Game" />
<MenuItem id="SaveGame" mnemonicParsing="false" onAction="#handleSaveGameAction" text="Save Game" />
<MenuItem id="Quit" mnemonicParsing="false" onAction="#handleQuitGameAction" text="Quit" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
<GridPane fx:id="topGrid" alignment="CENTER" gridLinesVisible="true" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" onMouseClicked="#topGridClicked" prefHeight="175.0" prefWidth="175.0" rotate="-73.0" style="-fx-background-color: #FFFFFF;" VBox.vgrow="NEVER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<rotationAxis>
<Point3D x="1.0" y="1.0" z="1.0" />
</rotationAxis>
<VBox.margin>
<Insets left="200.0" top="50.0" />
</VBox.margin>
</GridPane>
<GridPane fx:id="middleGrid" gridLinesVisible="true" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" onMouseClicked="#middleGridClicked" prefHeight="175.0" prefWidth="175.0" rotate="-73.0" style="-fx-background-color: #FFFFFF;" VBox.vgrow="NEVER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<rotationAxis>
<Point3D x="1.0" y="1.0" z="1.0" />
</rotationAxis>
<VBox.margin>
<Insets left="200.0" top="-45.0" />
</VBox.margin>
</GridPane>
<GridPane fx:id="lowerGrid" gridLinesVisible="true" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" onMouseClicked="#lowerGridClicked" prefHeight="175.0" prefWidth="175.0" rotate="-73.0" style="-fx-background-color: #FFFFFF;" VBox.vgrow="NEVER">
<columnConstraints>
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
<RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
</rowConstraints>
<rotationAxis>
<Point3D x="1.0" y="1.0" z="1.0" />
</rotationAxis>
<VBox.margin>
<Insets left="200.0" top="-40.0" />
</VBox.margin>
</GridPane>
<Label prefHeight="17.0" prefWidth="588.0" />
</children>
</VBox>
<Line endX="172.0" endY="410.0" startX="172.0" startY="145.0" style="-fx-opacity: .2;" />
<Line endX="403.0" endY="447.0" startX="403.0" startY="182.0" style="-fx-opacity: .2;" />
<Line endX="265.0" endY="353.0" startX="265.0" startY="89.0" style="-fx-opacity: .2;" />
<Line endX="310.0" endY="500.0" startX="310.0" startY="235.0" style="-fx-opacity: .2;" />
</children>
</AnchorPane>
FXML控制器代码如下
package pkg3dtictactoe;
import java.io.IOException;
import java.net.URL;
import java.util.Iterator;
import java.util.ResourceBundle;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.Node;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.input.MouseEvent;
import javafx.scene.layout.GridPane;
/**
*
*/
public class FXMLDocumentController implements Initializable {
@FXML
private GridPane topGrid;
private GridPane middleGrid;
private GridPane lowerGrid;
private Image imageX = null;
private Image imageO = null;
private Image imageEmpty = null;
public FXMLDocumentController(){
imageEmpty = new Image("resources/empty.png");
imageX = new Image("resources/x.png");
imageO = new Image("resources/0.png");
}
@FXML
private void handleButtonAction(ActionEvent event) {
}
@FXML
private void handleNewGameAction(ActionEvent event) throws IOException {
for(int i=0; i<3; i++){
for(int j=0; j<3; j++){
resetNode(topGrid, i, j);
resetNode(middleGrid, i, j);
resetNode(lowerGrid, i, j);
}
}
}
private void resetNode(GridPane grid, int i, int j) {
Node node = getNodeByRowColumnIndex(j, i, grid);
grid.getChildren().remove(node);
grid.add(new ImageView(imageEmpty), j, i);
}
public Node getNodeByRowColumnIndex(final int row,final int column,GridPane gridPane) {
Node result = null;
ObservableList<Node> childrens = gridPane.getChildren();
for(Node node : childrens) {
if(node instanceof ImageView && gridPane.getRowIndex(node) == row && gridPane.getColumnIndex(node) == column) {
result = node;
break;
}
}
return result;
}
@Override
public void initialize(URL url, ResourceBundle rb) {
// TODO
}
}
当我在构造函数中运行debug时，topGrid具有信息，但是middleGrid和LowerGrid没有信息。当谈到topGrid并与其他GridPanes的代码匹配时，似乎没有什么特别的。 JavaFX中不能有多个网格窗格吗？
最佳答案
@FXML注释直接应用于在它们之后声明的对象。您需要在每个组件上方的行上用fx:id多次注释，以连接它们。