Question

当Validator（即StringValidator，NumberValidator等）因验证失败而调度无效事件时，源控件的errorString属性（即TextInput）将设置为非空字符串，该字符串会在控件周围创建一个红色边框并且仅当鼠标悬停在控件上时显示工具提示（errorTip）。

问题：您是否可以强制立即显示toolTip（errorTip）而不是等待用户将鼠标悬停在控件上？如果是这样，怎么样？

Answer 1

Aral Balkan在zdmytriv's answer中链接的文章是很好的阅读，并提倡为用户提供更好的整体验证互动。

如果您只想“强制”弹出错误提示，请执行以下操作：

    public function showErrorImmediately(target:UIComponent):void
    {
        // we have to callLater this to avoid other fields that send events
        // that reset the timers and prevent the errorTip ever showing up.
        target.callLater(showDeferred, [target]);
    }

    private function showDeferred(target:UIComponent):void
    {
        var oldShowDelay:Number = ToolTipManager.showDelay;
        ToolTipManager.showDelay = 0;
        if (target.visible)
        {
            // try popping the resulting error flag via the hack 
            // courtesy Adobe bug tracking system
            target.dispatchEvent(new MouseEvent(MouseEvent.MOUSE_OUT));
            target.dispatchEvent(new MouseEvent(MouseEvent.MOUSE_OVER));
        }
        ToolTipManager.showDelay = oldShowDelay;
    }

    public function clearErrorImmediately(target:UIComponent):void
    {
        target.callLater(clearDeferred, [target]);
    }

    private function clearDeferred(target:UIComponent):void
    {
        var oldDelay:Number = ToolTipManager.hideDelay;
        ToolTipManager.hideDelay = 0;
        if (target.visible)
        {
            // clear the errorTip
            try
            {
                target.dispatchEvent(new MouseEvent(MouseEvent.MOUSE_OVER));
                target.dispatchEvent(new MouseEvent(MouseEvent.MOUSE_OUT));
            }
            catch (e:Error)
            {
                // sometimes things aren't initialized fully when we try that trick
            }
        }
        ToolTipManager.hideDelay = oldDelay;
    }

Answer 2

选中此Better form validation in Flex

Flex：在验证失败时强制显示控件的errorTip（错误工具提示）

2 个答案: