Java StyleableProperty:如何在运行时以编程方式更改值?
我的用例:Java StyleableProperty:如何在运行时以编程方式更改值?,java,css,javafx,Java,Css,Javafx,我的用例: 控件上的自定义属性,应通过css进行配置 该属性在运行时必须是可更改的 对于控件的给定实例,在重新应用css时不得恢复编程更改 定制看起来是实现需求的完美匹配。下面是一个实现的示例(取自的javadoc类,未做任何更改) 除了最后一个要求外,一切正常:在applyCss上,重新应用样式表中的默认值。复制: 运行该示例,请注意MyButton的初始“selected”状态(复选框“selected is bound it”)为true 单击custom按钮,注意“selected
- 控件上的自定义属性,应通过css进行配置
- 该属性在运行时必须是可更改的
- 对于控件的给定实例,在重新应用css时不得恢复编程更改
- 运行该示例,请注意MyButton的初始“selected”状态(复选框“selected is bound it”)为true
- 单击custom按钮,注意“selected”不会更改为false(尽管actionHandler会更改它)
- 单击第二个(“切换”)按钮,请注意,自定义按钮的选定状态将更改为false
- 将鼠标悬停在“自定义”按钮上,请注意,选定的状态会返回到true
- 我使用StyleableProperty的方法正确吗
- 如果是这样,如何调整,使其在发生手动更改后不会重新应用
- 如果没有,还有什么办法
- 或者可能问了一个完全错误的问题:可能通过css设置的属性不应该被代码(永久)更改
public class StyleableButtonDriver extends Application {
/**
* example code from class doc of StyleablePropertyFactory.
*/
private static class MyButton extends Button {
private static final StyleablePropertyFactory<MyButton> FACTORY
= new StyleablePropertyFactory<>(Button.getClassCssMetaData());
MyButton(String labelText) {
super(labelText);
getStyleClass().add("my-button");
setStyle("-my-selected: true");
}
// Typical JavaFX property implementation
public ObservableValue<Boolean> selectedProperty() { return (ObservableValue<Boolean>)selected; }
public final boolean isSelected() { return selected.getValue(); }
public final void setSelected(boolean isSelected) { selected.setValue(isSelected); }
// StyleableProperty implementation reduced to one line
private final StyleableProperty<Boolean> selected =
FACTORY.createStyleableBooleanProperty(
this, "selected", "-my-selected", s -> s.selected);
@Override
public List<CssMetaData<? extends Styleable, ?>> getControlCssMetaData() {
return FACTORY.getCssMetaData();
}
public static List<CssMetaData<? extends Styleable, ?>> getClassCssMetaData() {
return FACTORY.getCssMetaData();
}
}
private Parent createContent() {
MyButton button = new MyButton("styleable button");
button.setOnAction(e -> {
// does not work: reset on applyCss
boolean isSelected = button.isSelected();
button.setSelected(!isSelected);
});
CheckBox box = new CheckBox("button selected");
box.selectedProperty().bind(button.selectedProperty());
Button toggle = new Button("toggle button");
toggle.setOnAction(e -> {
boolean isSelected = button.isSelected();
button.setSelected(!isSelected);
});
BorderPane content = new BorderPane(button);
content.setBottom(new HBox(10, box, toggle));
return content;
}
@Override
public void start(Stage stage) throws Exception {
stage.setScene(new Scene(createContent(), 300, 200));
//same behavior as setting the style directly
// URL uri = getClass().getResource("xstyleable.css");
// stage.getScene().getStylesheets().add(uri.toExternalForm());
// not useful: would have to override all
// Application.setUserAgentStylesheet(uri.toExternalForm());
stage.setTitle(FXUtils.version());
stage.show();
}
public static void main(String[] args) {
launch(args);
}
@SuppressWarnings("unused")
private static final Logger LOG = Logger
.getLogger(StyleableButtonDriver.class.getName());
}
公共类StyleableButtonDriver扩展应用程序{
/**
*StyleablePropertyFactory类文档中的示例代码。
*/
私有静态类MyButton扩展按钮{
私有静态最终StyleablePropertyFactory工厂
=新的StyleablePropertyFactory(Button.getClassCssMetaData());
MyButton(字符串标签文本){
超级(标签文本);
getStyleClass().add(“我的按钮”);
setStyle(“-my selected:true”);
}
//典型的JavaFX属性实现
public observeValue selectedProperty(){return(observeValue)selected;}
公共最终布尔值isSelected(){返回selected.getValue();}
公共最终void setSelected(布尔值isSelected){selected.setValue(isSelected);}
//StyleableProperty实现减少到一行
已选择私有最终StyleableProperty=
FACTORY.createStyleableBooleanProperty(
此选项为“已选择”,“我的已选择”,s->s已选择);
@凌驾
public List>getClassCssMetaData(){
return FACTORY.getCssMetaData();
}
}
私有父createContent(){
MyButton button=新建MyButton(“可样式化按钮”);
按钮。设置操作(e->{
//不工作:在applyCss上重置
布尔值isSelected=按钮。isSelected();
按钮.setSelected(!isSelected);
});
复选框=新复选框(“选中的按钮”);
box.selectedProperty().bind(button.selectedProperty());
按钮切换=新按钮(“切换按钮”);
切换设置动作(e->{
布尔值isSelected=按钮。isSelected();
按钮.setSelected(!isSelected);
});
边框窗格内容=新建边框窗格(按钮);
setBottom(新的HBox(10,框,切换));
返回内容;
}
@凌驾
public void start(Stage)引发异常{
stage.setScene(新场景(createContent(),300200));
//与直接设置样式的行为相同
//URL uri=getClass().getResource(“xstyleable.css”);
//stage.getScene().getStylesheets().add(uri.toExternalForm());
//不有用:必须覆盖所有
//setUserAgentStylesheet(uri.toExternalForm());
stage.setTitle(FXUtils.version());
stage.show();
}
公共静态void main(字符串[]args){
发射(args);
}
@抑制警告(“未使用”)
专用静态最终记录器日志=记录器
.getLogger(StyleableButtonDriver.class.getName());
}
您的做法是正确的,但由于需要覆盖样式来源的默认优先级(用户代理样式表<编程指定节点.样式
属性),因此无法使用SyleablePropertyFactory
创建此属性。您需要创建一个CssMetaData
对象,如果某个属性是通过编程指定的,则该对象将该属性指示为不可设置
private static class MyButton extends Button {
private static final List<CssMetaData<? extends Styleable, ?>> CLASS_CSS_METADATA;
private static final CssMetaData<MyButton, Boolean> SELECTED;
static {
SELECTED = new CssMetaData<MyButton, Boolean>("-my-selected", StyleConverter.getBooleanConverter()) {
@Override
public boolean isSettable(MyButton styleable) {
// not setable, if bound or set by user
return styleable.selected.getStyleOrigin() != StyleOrigin.USER && !styleable.selected.isBound();
}
@Override
public StyleableProperty<Boolean> getStyleableProperty(MyButton styleable) {
return styleable.selected;
}
};
// copy list of button css metadata to list and add new metadata object
List<CssMetaData<? extends Styleable, ?>> buttonData = Button.getClassCssMetaData();
List<CssMetaData<? extends Styleable, ?>> mybuttonData = new ArrayList<>(buttonData.size()+1);
mybuttonData.addAll(buttonData);
mybuttonData.add(SELECTED);
CLASS_CSS_METADATA = Collections.unmodifiableList(mybuttonData);
}
MyButton(String labelText) {
super(labelText);
getStyleClass().add("my-button");
setStyle("-my-selected: true");
}
// Typical JavaFX property implementation
public ObservableValue<Boolean> selectedProperty() { return selected; }
public final boolean isSelected() { return selected.get(); }
public final void setSelected(boolean isSelected) { selected.set(isSelected); }
// StyleableProperty implementation reduced to one line
private final SimpleStyleableBooleanProperty selected = new SimpleStyleableBooleanProperty(SELECTED, this, "selected");
@Override
public List<CssMetaData<? extends Styleable, ?>> getControlCssMetaData() {
return CLASS_CSS_METADATA;
}
public static List<CssMetaData<? extends Styleable, ?>> getClassCssMetaData() {
return CLASS_CSS_METADATA;
}
}
私有静态类MyButton扩展按钮{
私有静态最终列表>buttonData=Button.getClassCssMetaData();
列表>getControlCssMetaData(){
返回类\u CSS\u元数据;
}
公共静态列表看起来很有希望-明天将尝试并返回,谢谢:-)