JAVAFX更改后如何更新复选框取消选择？
您好，我正在尝试编写一个JavaFXGUI应用程序，允许用户使用一组复选框选择一组比萨配料。假设每种配料的价格为50美分，一个普通比萨饼的价格为10美元，则显示比萨饼的价格。请注意，一旦勾选或取消勾选了配料，比萨饼的价格应该会自动更新。我几乎让它工作，但当我点击多个框的价格变化，我试图+0.50美分每浇头，如果我取消选择复选框-0,50美分，但当我选择多个复选框，它是添加更多。我怎么能换这个谢谢JAVAFX更改后如何更新复选框取消选择？,java,user-interface,javafx,checkbox,Java,User Interface,Javafx,Checkbox,您好，我正在尝试编写一个JavaFXGUI应用程序，允许用户使用一组复选框选择一组比萨配料。假设每种配料的价格为50美分，一个普通比萨饼的价格为10美元，则显示比萨饼的价格。请注意，一旦勾选或取消勾选了配料，比萨饼的价格应该会自动更新。我几乎让它工作，但当我点击多个框的价格变化，我试图+0.50美分每浇头，如果我取消选择复选框-0,50美分，但当我选择多个复选框，它是添加更多。我怎么能换这个谢谢 import javafx.scene.control.CheckBox; import javaf
import javafx.scene.control.CheckBox;
import javafx.scene.text.Text;
import javafx.event.ActionEvent;
import javafx.geometry.Pos;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
public class PizzaMenu extends VBox
{
private double cost;
private Text text;
private CheckBox checkbox1, checkbox2, checkbox3, checkbox4, checkbox5, checkbox6;
public PizzaMenu()
{
cost=10.00;
text=new Text("Pizza Cost:" + cost);
checkbox1 = new CheckBox("Extra Cheese");
checkbox1.setOnAction(this::processCheckBox);
checkbox2 = new CheckBox("Green Pepper");
checkbox2.setOnAction(this::processCheckBox);
checkbox3 = new CheckBox("Pepperoni");
checkbox3.setOnAction(this::processCheckBox);
checkbox4 = new CheckBox("Onion");
checkbox4.setOnAction(this::processCheckBox);
checkbox5 = new CheckBox("Sausage");
checkbox5.setOnAction(this::processCheckBox);
checkbox6 = new CheckBox("Anchovies");
checkbox6.setOnAction(this::processCheckBox);
//layout container 4 hbox, 2 vbox?
HBox hSet1 = new HBox(checkbox1, checkbox2);
hSet1.setAlignment(Pos.CENTER);
HBox hSet2 = new HBox(checkbox3, checkbox4);
hSet2.setAlignment(Pos.CENTER);
HBox hSet3 = new HBox(checkbox5, checkbox6);
hSet3.setAlignment(Pos.CENTER);
HBox userCost = new HBox(text);
userCost.setAlignment(Pos.CENTER);
VBox vSet1 = new VBox(hSet1,hSet2,hSet3,userCost);
vSet1.setAlignment(Pos.CENTER);
setSpacing(20);
getChildren().addAll(vSet1);
}
public void processCheckBox(ActionEvent event)
{
if(checkbox1.isSelected() || checkbox2.isSelected() || checkbox3.isSelected() || checkbox4.isSelected() || checkbox5.isSelected() || checkbox6.isSelected())
{
cost = cost + 0.50;
text.setText("Pizza Cost:" + cost);
}
else if(!checkbox1.isSelected() || !checkbox2.isSelected() || !checkbox3.isSelected() || !checkbox4.isSelected() || !checkbox5.isSelected() || !checkbox6.isSelected())
{
cost = cost - 0.50;
text.setText("Pizza Cost:" + cost);
}
}
}
import javafx.scene.control.CheckBox;
import javafx.scene.text.Text;
import javafx.event.ActionEvent;
import javafx.geometry.Pos;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
public class PizzaMenu extends VBox
{
private double cost;
private Text text;
private CheckBox checkbox1, checkbox2, checkbox3, checkbox4, checkbox5, checkbox6;
public PizzaMenu()
{
cost=10.00;
text=new Text("Pizza Cost:" + cost);
checkbox1 = new CheckBox("Extra Cheese");
checkbox1.setOnAction(this::processCheckBox);
checkbox2 = new CheckBox("Green Pepper");
checkbox2.setOnAction(this::processCheckBox);
checkbox3 = new CheckBox("Pepperoni");
checkbox3.setOnAction(this::processCheckBox);
checkbox4 = new CheckBox("Onion");
checkbox4.setOnAction(this::processCheckBox);
checkbox5 = new CheckBox("Sausage");
checkbox5.setOnAction(this::processCheckBox);
checkbox6 = new CheckBox("Anchovies");
checkbox6.setOnAction(this::processCheckBox);
//layout container 4 hbox, 2 vbox?
HBox hSet1 = new HBox(checkbox1, checkbox2);
hSet1.setAlignment(Pos.CENTER);
HBox hSet2 = new HBox(checkbox3, checkbox4);
hSet2.setAlignment(Pos.CENTER);
HBox hSet3 = new HBox(checkbox5, checkbox6);
hSet3.setAlignment(Pos.CENTER);
HBox userCost = new HBox(text);
userCost.setAlignment(Pos.CENTER);
VBox vSet1 = new VBox(hSet1,hSet2,hSet3,userCost);
vSet1.setAlignment(Pos.CENTER);
setSpacing(20);
getChildren().addAll(vSet1);
}
public void processCheckBox(ActionEvent event)
{
// if(checkbox1.isSelected() || checkbox2.isSelected() || checkbox3.isSelected() || checkbox4.isSelected() || checkbox5.isSelected() || checkbox6.isSelected())
// {
// cost = cost + 0.50;
// text.setText("Pizza Cost:" + cost);
// }
// else if(!checkbox1.isSelected() || !checkbox2.isSelected() || !checkbox3.isSelected() || !checkbox4.isSelected() || !checkbox5.isSelected() || !checkbox6.isSelected())
// {
// cost = cost - 0.50;
// text.setText("Pizza Cost:" + cost);
// }
if(event.getSource()==checkbox1)
{
if(checkbox1.isSelected())
{
cost = cost + 0.50;
text.setText("Pizza Cost:" + cost);
}
else
{
cost = cost - 0.50;
text.setText("Pizza Cost:" + cost);
}
}
if(event.getSource()==checkbox2)
{
if(checkbox2.isSelected())
{
cost = cost + 0.50;
text.setText("Pizza Cost:" + cost);
}
else
{
cost = cost - 0.50;
text.setText("Pizza Cost:" + cost);
}
}
if(event.getSource()==checkbox3)
{
if(checkbox3.isSelected())
{
cost = cost + 0.50;
text.setText("Pizza Cost:" + cost);
}
else
{
cost = cost - 0.50;
text.setText("Pizza Cost:" + cost);
}
}
if(event.getSource()==checkbox4)
{
if(checkbox4.isSelected())
{
cost = cost + 0.50;
text.setText("Pizza Cost:" + cost);
}
else
{
cost = cost - 0.50;
text.setText("Pizza Cost:" + cost);
}
}
if(event.getSource()==checkbox5)
{
if(checkbox5.isSelected())
{
cost = cost + 0.50;
text.setText("Pizza Cost:" + cost);
}
else
{
cost = cost - 0.50;
text.setText("Pizza Cost:" + cost);
}
}
if(event.getSource()==checkbox6)
{
if(checkbox6.isSelected())
{
cost = cost + 0.50;
text.setText("Pizza Cost:" + cost);
}
else
{
cost = cost - 0.50;
text.setText("Pizza Cost:" + cost);
}
}
}
}
问题是您正在根据每个复选框重新计算整个价格，然后您应该从每个操作事件的基本成本开始：
public void processCheckBox(ActionEvent event)
{
cost = 10.00;
int toppings = checkbox1.isSelected() ? 1 : 0 +
checkbox2.isSelected() ? 1 : 0 +
checkbox3.isSelected() ? 1 : 0 +
checkbox4.isSelected() ? 1 : 0 +
checkbox5.isSelected() ? 1 : 0 +
checkbox6.isSelected() ? 1 : 0;
cost = cost + (toppings * 0.50);
text.setText("Pizza Cost:" + cost);
}
问题是您正在根据每个复选框重新计算整个价格，然后您应该从每个操作事件的基本成本开始：
public void processCheckBox(ActionEvent event)
{
cost = 10.00;
int toppings = checkbox1.isSelected() ? 1 : 0 +
checkbox2.isSelected() ? 1 : 0 +
checkbox3.isSelected() ? 1 : 0 +
checkbox4.isSelected() ? 1 : 0 +
checkbox5.isSelected() ? 1 : 0 +
checkbox6.isSelected() ? 1 : 0;
cost = cost + (toppings * 0.50);
text.setText("Pizza Cost:" + cost);
}
对了，谢谢我已经修复了它（我想）上面会更新使用的三元运算符很酷，谢谢你的输入！您还可以泛化更新，这样，如果使用简单的强制转换添加另一个复选框，则不需要增加该方法：public void processCheckBox（ActionEvent事件）{if（（（checkbox）event.getSource（））.isSelected（）{cost=cost+0.50；}else{cost=cost-0.50；}text.setText（“Pizza cost:+cost”）}对了，谢谢我已经修复了它（我想）上面会更新使用的三元运算符很酷，谢谢你的输入！您还可以泛化更新，这样，如果使用简单的强制转换添加另一个复选框，则不需要增加该方法：public void processCheckBox（ActionEvent事件）{if（（（checkbox）event.getSource（））.isSelected（）{cost=cost+0.50；}else{cost=cost-0.50；}text.setText（“Pizza cost:+cost”）}不相关：布局意味着要使用（未扩展）不相关：布局意味着要使用（未扩展）