对于JavaFX还是比较新的,我在将按钮添加到GUI中时遇到了一些问题建立。如何通过controller.java文件使用GridPane的fx:id将按钮添加到JavaFX gui
我有3个文件:Main.java,Controller.java和sample.fxml(每下方)
从我通过教程和文档读取时,Controller.java文件被加载和链接到fxml文件,因为“fx:controller”部分 - 但除此之外,我无法正确地让程序运行该方法。
我已经尝试设置Main.java作为控制器,并以这种方式融合代码(轰炸)。即使积极地反对这种形式,并试图在Main.java文件中创建一个Controller.java的新实例(它本质上只是在程序运行时加载的内容旁边创建另一个实例),并且这种情况也被过度轰炸。
任何指针?
Main.java
package soundboardEoZ;
import javafx.application.Application;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;
public class Main extends Application {
int sound_index = 1;
int target = 10;
@Override
public void start(Stage primaryStage) throws Exception{
Parent root = FXMLLoader.load(getClass().getResource("sample.fxml"));
primaryStage.setTitle("Hello World");
primaryStage.setScene(new Scene(root, 300, 275));
primaryStage.show();
while (sound_index < target){
// This is where I want to call the addButton() method from Controller.java
sound_index++;
}
}
public static void main(String[] args) {
launch(args);
}
}
Controller.java
package soundboardEoZ;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.layout.GridPane;
public class Controller {
int index = 2;
int target = 10;
@FXML
GridPane button_grid;
void test(){
System.out.println("Testing");
}
void addButton(){
Button sound_button = new Button("Button_" + index);
button_grid.add(sound_button, index,2);
}
}
而我们FXML文件
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.control.SeparatorMenuItem?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.Pane?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.text.Text?>
<!--VBox is a single column panel-->
<?import javafx.scene.text.Font?>
<VBox id="vbox" prefHeight="400" prefWidth="1000" xmlns="http://javafx.com/javafx/8.0.76-ea" xmlns:fx="http://javafx.com/fxml/1" fx:controller="soundboardEoZ.Controller">
<MenuBar fx:id="menuBar"> <!--Literally a MenuBar-->
<menus> <!--Holds the menu concept for the bar-->
<Menu text="File"> <!--Menu holds Items-->
<items>
<MenuItem text="New" />
<MenuItem text="Open" />
<SeparatorMenuItem />
<MenuItem text="Save Settings" />
<SeparatorMenuItem />
<MenuItem text="Settings" />
</items>
</Menu>
<Menu text="Edit">
<items>
<MenuItem text="Copy" />
</items>
</Menu>
<Menu text="About">
<items>
<MenuItem text="Team" />
</items>
</Menu>
<Menu text="Help">
<items>
<MenuItem text="Guide" />
<MenuItem text="Forums" />
</items>
</Menu>
</menus>
</MenuBar>
<Pane>
<GridPane>
<Button GridPane.columnIndex="0">I'm another Test</Button>
<Text fill="RED" stroke="BLACK" strokeWidth="2.0" GridPane.columnIndex="1">
<font><Font size="25"/></font>
Testing
</Text>
</GridPane>
</Pane>
<GridPane fx:id="button_grid" hgap="10" vgap="10" xmlns:fx="http://javafx.com/fxml">
<!--<Button GridPane.columnIndex="0" GridPane.rowIndex="1">Hello!</Button>-->
<!--<Button GridPane.columnIndex="1">Hiya!</Button>-->
<!--<Text text="Clickity!" GridPane.columnIndex="0" GridPane.rowIndex="0" GridPane.columnSpan="2" />-->
<!--<Label text="Configuration Name:" GridPane.columnIndex="0" GridPane.rowIndex="1" />-->
<!--<TextField GridPane.columnIndex="1" GridPane.rowIndex="1" />-->
<!--<Button fx:id="test_button" text="Hello"></Button>-->
</GridPane>
</VBox>
你为什么要打电话从'Main'代码?只需在控制器中定义一个'initialize()'方法并从那里调用它。 –