Question

对具有ConfirmBehavior的按钮进行Ajax更新后，所有确认对话框属性（标题，消息，图标）都变为空。

看起来只在buildView阶段（applyMetadata function）

评估thoses值

在ConfirmBehavior的getHeader() / getMessage() / getIcon()方法中，没有对表达式的评估。

如何在这一点上获得真正的表达？（在渲染阶段评估它）

Answer 1

不是一个完美的解决方案

public class ConfirmBehavior extends ClientBehaviorBase {

    private String header;
    private String message;
    private String icon;

    @Override
    public String getScript(ClientBehaviorContext behaviorContext) {
        FacesContext context = behaviorContext.getFacesContext();
        UIComponent component = behaviorContext.getComponent();
        String source = component.getClientId(context);

        if(component instanceof Confirmable) {          
            String headerExpr = (String) component.getAttributes().get("confirm_header");
            if (headerExpr!=null)
                this.header = (String) ContextUtil.eval(context, headerExpr);
            String messageExpr = (String) component.getAttributes().get("confirm_message");         
            if (messageExpr!=null)
                this.message = (String) ContextUtil.eval(context, messageExpr);
            String iconExpr = (String) component.getAttributes().get("confirm_icon");           
            if (iconExpr!=null)
                this.icon = (String) ContextUtil.eval(context, iconExpr);
            String script = "PrimeFaces.confirm({source:'" + source + "',header:'" + getHeader() + "',message:'" + getMessage() + "',icon:'" + getIcon()  + "'});return false;";
            ((Confirmable) component).setConfirmationScript(script);

            return null;
        }
        else {
            throw new FacesException("Component " + source + " is not a Confirmable. ConfirmBehavior can only be attached to components that implement org.primefaces.component.api.Confirmable interface");
        }

    }
...
}

确认行为不支持Ajax呈现

1 个答案: