我目前正在开展最后一年的项目，即创建一个数独游戏/解算器。我遇到的问题是，在使用场景框架时，我无法找到一种将字体大小调整为容器大小的方法。
我希望标签的字体大小更改为它所在的网格面板的相应大小。然而，我发现很难将我需要的属性（例如'widthProperty'和'heightProperty'）绑定到'Font.font（size）'
这个问题与其他绑定问题的区别在于，我的场景框架干扰了在控制器的initialize方法中对控件进行绑定。我不能这样做，因为我的所有控制器都是在启动时初始化的，而不是在它们显示到场景时
这是我的所有代码：
Main.java
package Controller;
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Main extends Application {
public static String mainMenu = "Main Menu";
public static String mainMenuFXML = "/FXML/MainMenu.fxml";
public static String chooseLevel = "Level Selection";
public static String chooseLevelFXML = "/FXML/ChooseLevel.fxml";
//Global Variable to be accessed across all classes
//To be used to determine which scenes are loaded in the HashMap and also which scene has been set
public static SceneFramework mainController = new SceneFramework();
@Override
public void start(Stage primaryStage) throws Exception{
//Only the main menu scene is needed to be loaded at the start
mainController.loadScene(Main.mainMenu, Main.mainMenuFXML);
mainController.setScene(Main.mainMenu);
StackPane root = new StackPane();
root.getChildren().addAll(mainController);
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
SceneFramework.java
package Controller;
import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.layout.StackPane;
import java.util.HashMap;
public class SceneFramework extends StackPane{
//Constructor for the class
public SceneFramework(){
//The keyword super, overrides methods from the superclass
super();
}
//This HashMap is used to hold the screens(scenes) to be used within the application
protected HashMap<String, Node> scenes = new HashMap<>();
//Adds the selected scene to the HashMap
public void addScene(String title, Node scene) {
scenes.put(title, scene);
}
//Returns the Node with the specified title for use within application
public Node getScene(String title) {
return scenes.get(title);
}
//Removes the selected scene from the framework
public boolean unloadScene(String title){
if(scenes.remove(title) == null){
System.out.println("Scene cannot be located or it doesn't exist");
return false;
} else{
return true;
}
}
public boolean loadScene(String title, String resource){
//encase code segment in try for exception handling,
// as resources are required to be found and then loaded into memory
try{
//Load FXML File
FXMLLoader loadedFXMLFile = new FXMLLoader(getClass().getResource(resource));
//Get Parent of scene
Parent loadScene = loadedFXMLFile.load();
//Get the Controller class of the parent
SetSceneParent sceneController = (loadedFXMLFile.getController());
//Method of making sure every scene knows who it's parent is
sceneController.setSceneParent(this);
//Add scene to HashMap
addScene(title, loadScene);
return true;
}catch (Exception e){
//If FXML resource can't be loaded then generate this
System.out.println("Could't load FXML file");
return false;
}
}
//Method for showing scenes
//If one scenes if wanting to be shown then it is added to the root
//If multiple scenes are wanting to be loaded then the first scene is removed and the new scene is then displayed
public boolean setScene(final String title){
//Check to see if scene can be found
if(scenes.get(title) != null) {
if(!getChildren().isEmpty()){
getChildren().remove(0);
getChildren().add(0 ,scenes.get(title));
}else{
getChildren().add(scenes.get(title));
}
return true;
} else{
System.out.println("Scene not located!!!");
return false;
}
}
}
SetSceneParent.java
package Controller;
import Controller.SceneFramework;
public interface SetSceneParent {
void setSceneParent(SceneFramework sceneParent);
}
MainMenuController.java
package Controller;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import java.net.URL;
import java.util.ResourceBundle;
public class MainMenuController implements Initializable, SetSceneParent {
@FXML
public Button playButton, optionsButton, quitButton;
@Override
public void initialize(URL location, ResourceBundle resources) {
SelectionStatus.initialize();
}
@Override
public void setSceneParent(SceneFramework sceneParent) {
//Sets the parent of the scene by using the global variable of the class SceneFramework
Main.mainController = sceneParent;
}
public void handlePlayButtonAction(){
//On clicking of the play button
//The user is taken to the level difficulty scene
Main.mainController.loadScene(Main.chooseLevel, Main.chooseLevelFXML);
Main.mainController.setScene(Main.chooseLevel);
Main.mainController.unloadScene(Main.mainMenu);
}
}
MainMenu.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.text.*?>
<?import java.lang.*?>
<?import javafx.geometry.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<BorderPane maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minHeight="-Infinity" minWidth="-Infinity" prefHeight="480.0" prefWidth="640.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Controller.MainMenuController">
<center>
<HBox>
<children>
<VBox alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" BorderPane.alignment="TOP_CENTER" HBox.hgrow="ALWAYS">
<children>
<Label alignment="TOP_CENTER" maxHeight="120.0" prefHeight="60.0" text="Sudoku Solver" textAlignment="CENTER" underline="true" wrapText="true" VBox.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="48.0" />
</font>
<VBox.margin>
<Insets right="10.0" />
</VBox.margin>
</Label>
<Button fx:id="playButton" maxHeight="175.0" maxWidth="1400.0" mnemonicParsing="false" onAction="#handlePlayButtonAction" prefHeight="60.0" prefWidth="300.0" text="Play" VBox.vgrow="ALWAYS">
<VBox.margin>
<Insets />
</VBox.margin>
<font>
<Font name="System Bold" size="18.0" />
</font>
</Button>
<Region maxHeight="80.0" prefHeight="0.0" VBox.vgrow="ALWAYS" />
<Button fx:id="optionsButton" maxHeight="175.0" maxWidth="1400.0" mnemonicParsing="false" prefHeight="60.0" prefWidth="300.0" text="Options" VBox.vgrow="ALWAYS">
<VBox.margin>
<Insets />
</VBox.margin>
<font>
<Font name="System Bold" size="18.0" />
</font>
</Button>
<Region maxHeight="80.0" prefHeight="0.0" VBox.vgrow="ALWAYS" />
<Button fx:id="quitButton" maxHeight="175.0" maxWidth="1400.0" mnemonicParsing="false" prefHeight="60.0" prefWidth="300.0" text="Quit" VBox.vgrow="ALWAYS">
<VBox.margin>
<Insets />
</VBox.margin>
<font>
<Font name="System Bold" size="18.0" />
</font>
</Button>
</children>
</VBox>
</children>
</HBox>
</center>
<left>
<HBox BorderPane.alignment="CENTER">
<children>
<Region maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" prefWidth="100.0" HBox.hgrow="ALWAYS" />
</children>
</HBox>
</left>
<right>
<HBox BorderPane.alignment="CENTER">
<children>
<Region maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" prefWidth="100.0" HBox.hgrow="ALWAYS" />
</children>
</HBox>
</right>
<bottom>
<VBox BorderPane.alignment="CENTER">
<children>
<Region prefHeight="60.0" VBox.vgrow="ALWAYS" />
</children>
</VBox>
</bottom>
</BorderPane>
ChooseLevelController.java
package Controller;
import javafx.fxml.FXML;
import javafx.fxml.Initializable;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.GridPane;
import java.net.URL;
import java.util.ResourceBundle;
public class ChooseLevelController implements Initializable, SetSceneParent {
@FXML
public Label lblLevelSelection, lblLevel1, lblLevel2, lblLevel3, lblLevel4, lblLevel5, lblLevel6, lblLevel7, lblLevel8, lblLevel9, lblLevel10; // Value injected by FXMLLoader
public Button backButton;
public GridPane gridPaneCenter;
@Override
public void initialize(URL location, ResourceBundle resources) {
//Assert code is to be used in debugging making sure references to files and their elements are correct
assert lblLevel1 != null : "fx:id=\"lblLevel1\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel2 != null : "fx:id=\"lblLevel2\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel3 != null : "fx:id=\"lblLevel3\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel4!= null : "fx:id=\"lblLevel4\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel5 != null : "fx:id=\"lblLevel5\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel6 != null : "fx:id=\"lblLevel6\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel7 != null : "fx:id=\"lblLevel7\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel8 != null : "fx:id=\"lblLevel8\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel9 != null : "fx:id=\"lblLevel9\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
assert lblLevel10 != null : "fx:id=\"lblLevel10\" was not injected: check your FXML file 'ChooseLevel.fxml'.";
}
@Override
public void setSceneParent(SceneFramework screenParent) {
//Sets the parent of the scene by using the global variable of the class SceneFramework
Main.mainController = screenParent;
}
//Logic code
@FXML
public void mouseClickedLevelLabel() {
//Load the play screen when any Label is pressed
lblLevel1.setOnMouseClicked(e -> handleLabelClick(1));
lblLevel2.setOnMouseClicked(e -> handleLabelClick(2));
lblLevel3.setOnMouseClicked(e -> handleLabelClick(3));
lblLevel4.setOnMouseClicked(e -> handleLabelClick(4));
lblLevel5.setOnMouseClicked(e -> handleLabelClick(5));
lblLevel6.setOnMouseClicked(e -> handleLabelClick(6));
lblLevel7.setOnMouseClicked(e -> handleLabelClick(7));
lblLevel8.setOnMouseClicked(e -> handleLabelClick(8));
lblLevel9.setOnMouseClicked(e -> handleLabelClick(9));
lblLevel10.setOnMouseClicked(e -> handleLabelClick(10));
}
@FXML
public void handleBackButtonAction() {
//On clicking of the back button
//The user is taken to the level difficulty scene
Main.mainController.loadScene(Main.mainMenu, Main.mainMenuFXML);
Main.mainController.setScene(Main.mainMenu);
Main.mainController.unloadScene(Main.chooseLevel);
}
}
ChooseLevel.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.geometry.*?>
<?import javafx.scene.text.*?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<BorderPane maxHeight="1.7976931348623157E308" maxWidth="1.7976931348623157E308" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="Controller.ChooseLevelController">
<center>
<VBox alignment="CENTER" BorderPane.alignment="CENTER">
<children>
<GridPane fx:id="gridPaneCenter" alignment="CENTER" maxHeight="1.7976931348623157E308" maxWidth="1500.0" prefHeight="242.0" prefWidth="475.0" BorderPane.alignment="CENTER" VBox.vgrow="ALWAYS">
<columnConstraints>
<ColumnConstraints hgrow="ALWAYS" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="ALWAYS" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="ALWAYS" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="ALWAYS" minWidth="10.0" prefWidth="100.0" />
<ColumnConstraints hgrow="ALWAYS" minWidth="10.0" prefWidth="100.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints maxHeight="1.7976931348623157E308" minHeight="10.0" prefHeight="137.0" vgrow="ALWAYS" />
<RowConstraints maxHeight="1.7976931348623157E308" minHeight="10.0" prefHeight="138.0" vgrow="ALWAYS" />
</rowConstraints>
<children>
<Label fx:id="lblLevel1" onMousePressed="#mouseClickedLevelLabel" text="1" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel2" onMouseClicked="#mouseClickedLevelLabel" onMousePressed="#mouseClickedLevelLabel" text="2" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel3" onMousePressed="#mouseClickedLevelLabel" text="3" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel4" onMousePressed="#mouseClickedLevelLabel" text="4" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel5" onMousePressed="#mouseClickedLevelLabel" text="5" GridPane.columnIndex="4" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel6" onMouseClicked="#mouseClickedLevelLabel" onMousePressed="#mouseClickedLevelLabel" text="6" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.rowIndex="1" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel7" onMousePressed="#mouseClickedLevelLabel" text="7" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.rowIndex="1" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel8" onMousePressed="#mouseClickedLevelLabel" text="8" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.rowIndex="1" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel9" onMousePressed="#mouseClickedLevelLabel" text="9" GridPane.columnIndex="3" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.rowIndex="1" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Label fx:id="lblLevel10" onMousePressed="#mouseClickedLevelLabel" text="10" GridPane.columnIndex="4" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.rowIndex="1" GridPane.vgrow="ALWAYS">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
</children>
</GridPane>
</children>
</VBox>
</center>
<top>
<GridPane fx:id="gridPaneTop">
<columnConstraints>
<ColumnConstraints hgrow="ALWAYS" maxWidth="207.0" minWidth="10.0" prefWidth="20.0" />
<ColumnConstraints hgrow="SOMETIMES" maxWidth="207.0" minWidth="10.0" prefWidth="58.0" />
<ColumnConstraints hgrow="ALWAYS" maxWidth="207.0" minWidth="10.0" prefWidth="105.0" />
<ColumnConstraints hgrow="ALWAYS" maxWidth="451.0" minWidth="10.0" prefWidth="418.0" />
</columnConstraints>
<rowConstraints>
<RowConstraints minHeight="10.0" vgrow="SOMETIMES" />
</rowConstraints>
<children>
<Button fx:id="backButton" maxHeight="-Infinity" maxWidth="1.7976931348623157E308" mnemonicParsing="false" onAction="#handleBackButtonAction" prefHeight="30.0" prefWidth="0.0" text="Back" GridPane.columnIndex="1" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.valignment="CENTER" />
<Separator prefHeight="63.0" prefWidth="73.0" visible="false" GridPane.columnIndex="2" GridPane.halignment="CENTER" GridPane.hgrow="ALWAYS" GridPane.valignment="CENTER" GridPane.vgrow="ALWAYS" />
<Label fx:id="lblLevelSelection" text="Level Selection" underline="true" GridPane.columnIndex="3">
<font>
<Font name="System Bold" size="36.0" />
</font>
</Label>
<Separator prefHeight="63.0" prefWidth="73.0" visible="false" />
</children>
</GridPane>
</top>
<bottom>
<Region prefHeight="36.0" prefWidth="600.0" BorderPane.alignment="CENTER" />
</bottom>
<left>
<HBox>
<children>
<Region maxWidth="1.7976931348623157E308" prefHeight="200.0" prefWidth="50.0" BorderPane.alignment="CENTER" HBox.hgrow="ALWAYS" />
</children>
</HBox>
</left>
<right>
<HBox>
<children>
<Region maxWidth="1.7976931348623157E308" prefHeight="300.0" prefWidth="50.0" BorderPane.alignment="CENTER" HBox.hgrow="ALWAYS" />
</children>
</HBox>
</right>
</BorderPane>
答案 0 :(得分：1)
好的，您的代码无法编译AGAIN。所以我只想发一个最小的例子：
<强> App.java
import javafx.application.Application;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class App extends Application {
@Override
public void start(Stage primaryStage) {
View view = new View();
Scene scene = new Scene(view, 400, 400);
primaryStage.setScene(scene);
primaryStage.show();
}
public static void main(String[] args) {
launch(args);
}
}
<强> View.java
import javafx.geometry.HPos;
import javafx.geometry.VPos;
import javafx.scene.control.Label;
import javafx.scene.layout.*;
public class View extends AnchorPane {
public View() {
GridPane gridPane = new GridPane();
ColumnConstraints column = new ColumnConstraints();
column.setPercentWidth(33.33);
column.setHalignment(HPos.CENTER);
gridPane.getColumnConstraints().addAll(column, column, column);
RowConstraints row = new RowConstraints();
row.setPercentHeight(33.33);
row.setValignment(VPos.CENTER);
gridPane.getRowConstraints().addAll(row, row, row);
gridPane.setGridLinesVisible(true);
AnchorPane.setTopAnchor(gridPane, 0.0);
AnchorPane.setBottomAnchor(gridPane, 0.0);
AnchorPane.setLeftAnchor(gridPane, 0.0);
AnchorPane.setRightAnchor(gridPane, 0.0);
for ( int i = 0 ; i < 9; i++ ) {
gridPane.add(new Label(i+1+""), i%3, i/3, 1, 1);
}
this.widthProperty().addListener( event -> {
this.setStyle("-fx-font-size: " + this.getWidth()/10);
});
this.getChildren().add(gridPane);
}
}
这是我在你的另一个问题上提出的建议......
修改
要更改确切元素的字体，您可以这样做：
this.widthProperty().addListener( event -> {
ObservableList<Node> labelList = gridPane.getChildren();
for ( int i = 0; i < labelList.size(); i++ ) {
//labelList.get(i).setStyle("-fx-font-size: " + this.getWidth()/10);
if ( labelList.get(i).getClass().equals(Label.class) ) {
Label.class.cast(labelList.get(i)).setFont(Font.font(this.getWidth()/10));
}
}
});
<强> EDIT2：
要获得具有高度和宽度的字体比例，您可以使用如下方法：
private void changeFontSize(List<Node> labelList) {
Double newFontSizeDouble = Math.hypot(this.getWidth(), this.getHeight())/10;
int newFontSizeInt = newFontSizeDouble.intValue();
for ( int i = 0; i < labelList.size(); i++ ) {
if ( labelList.get(i).getClass().equals(Label.class) ) {
Label.class.cast(labelList.get(i)).setFont(Font.font(newFontSizeInt));
}
}
}
并称之为：
this.widthProperty().addListener( event -> changeFontSize(gridPane.getChildren()));
this.heightProperty().addListener( event -> changeFontSize(gridPane.getChildren()));
<强> EDIT3：
您还可以使用属性绑定绑定它们。 youtube上有一个很好的教程：
https://www.youtube.com/watch?v=s8GomyEOA8w&index=29&list=PL6gx4Cwl9DGBzfXLWLSYVy8EbTdpGbUIG