英文:
JavaFX bind list size to this.setTitle()
问题
以下是翻译好的内容：
我希望我的笔记程序的标题在我的列表（笔记）更改时也随之改变。为了实现这一点，我想将一个IntegerProperty绑定到我的列表的大小，但是它显示：> Property<Number> 类型中的 bind(ObservableValue<? extends Number>) 方法不适用于参数 (int)这是否意味着我应该将大小从int转换为Number（我尝试过，但出现了另一个问题），还是有更简单的解决方案？public class Notes extends Stage {ObservableList<String> notes = FXCollections.observableArrayList();public Notes() {this.setup();}private void setup() {IntegerProperty size = new SimpleIntegerProperty();size.bind(this.notes.size());this.setTitle(String.format("Notes (%d)", size.getValue()));final Scene scene = new Scene(this.createRootPane());this.setScene(scene);}}
英文:
I want the title of my notes-program to change whenever my list (notes) changes. To achieve this I wanted to bind an IntegerProperty to the size of my list, but it says:
>The method bind(ObservableValue<? extends Number>) in the type Property<Number> is not applicable for the arguments (int)
Does this mean I should cast the size from int to a Number (tried it but there was another problem) or is there an even easier solution?
public class Notes extends Stage {ObservableList<String> notes = FXCollections.observableArrayList();public Notes() {this.setup();}private void setup() {IntegerProperty size = new SimpleIntegerProperty();size.bind(this.notes.size());this.setTitle(String.format("Notes (%d)", size.getValue()));final Scene scene = new Scene(this.createRootPane());this.setScene(scene);}}
答案1
得分: 1
只需将您的标题属性绑定到 列表大小 的 asString 绑定上：
titleProperty().bind(Bindings.size(notes).asString("Notes (%d)"));
英文:
Just bind your title property to the list size’s asString binding:
titleProperty().bind(Bindings.size(notes).asString("Notes (%d)"));
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