[英]Issues with setting bounds of NumberAxis based on user input in FXML JavaFX application
[英]Validating User Input using JavaFX and FXML
我想使用JavaFX和FXML驗證用戶單擊“提交”時的輸入。 查看.fxml文檔,您將看到我有2個輸入字段,一個為郵政編碼,一個為城市名。 我正在從xml文件中強制執行NumberTextField.java和CityNameTextField.java,但是當用戶單擊“提交”時,如何確保它們不為空?
FXMLDocument.fxml
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import validatetextfieldsfxml.custom.*?>
<Pane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
<children>
<Label layoutX="173.0" layoutY="89.0" text="ZipCode" />
<Label layoutX="173.0" layoutY="118.0" text="CityName" />
<NumberTextField fx:id="zipCodeTf" layoutX="257.0" layoutY="84.0" />
<CityNameTextField fx:id="cityNameTf" layoutX="257.0" layoutY="113.0" />
<Button fx:id="btn" layoutX="217.0" layoutY="162.0" mnemonicParsing="false" text="Submit" />
</children>
</Pane>
CityNameTextField.java
package validatetextfieldsfxml.custom;
import javafx.scene.control.TextField;
public class CityNameTextField extends TextField {
public CityNameTextField(){
this.setPromptText("Enter Your CityName");
}
@Override
public void replaceText(int i, int il, String string){
if(string.matches("[a-zA-Z]") || string.isEmpty()){
super.replaceText(il, il, string);
}
}
@Override
public void replaceSelection(String string) {
super.replaceSelection(string);
}
}
NumberTextField.java
package validatetextfieldsfxml.custom;
import javafx.scene.control.TextField;
public class NumberTextField extends TextField{
public NumberTextField(){
this.setPromptText("Enter Only numbers");
}
@Override
public void replaceText(int i, int il, String string){
if(string.matches("[0-9]") || string.isEmpty() ){
super.replaceText(i, il, string);
}
}
@Override
public void replaceSelection(String string){
super.replaceSelection(string);
}
}
在控制器的initialize
方法中,只需執行
btn.disableProperty().bind(zipCodeTf.textProperty().isEmpty()
.or(cityNameTf.textProperty().isEmpty()));
您也可以直接在FXML文件中執行以下操作:
<Button fx:id="btn" text="Submit"
disable="${ cityNameTf.text.empty || zipCodeTf.text.empty }"/>
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