java绑定选择框选定项属性到简单的双属性
我在选择框中有双值,但如何将选择框的“选定项”属性绑定到双值属性?下面的代码不会根据需要禁用该按钮。在我看来,这是因为selectedItemProperty不是DoubleProperty的实例?但我无法强制转换selectedItemProperty,因为它是只读属性。。我该怎么办?提前非常感谢java绑定选择框选定项属性到简单的双属性,java,binding,properties,combobox,selecteditemchanged,Java,Binding,Properties,Combobox,Selecteditemchanged,我在选择框中有双值,但如何将选择框的“选定项”属性绑定到双值属性?下面的代码不会根据需要禁用该按钮。在我看来,这是因为selectedItemProperty不是DoubleProperty的实例?但我无法强制转换selectedItemProperty,因为它是只读属性。。我该怎么办?提前非常感谢 SimpleDoubleProperty valueToCheck = new SimpleDoubleProperty(); valueToCheck.set(314.1) Button save
SimpleDoubleProperty valueToCheck = new SimpleDoubleProperty();
valueToCheck.set(314.1)
Button saveButton = new Button();
saveButton.disableProperty().bind(
choiceBox.getSelectionModel().selectedItemProperty().isEqualTo(
valueToCheck));
saveButton.setOnAction((ActionEvent event)->{
valueToCheck.set((Double)choiceBox.getSelectionModel().getSelectedItem());
});