如何指定文本输入在错误状态下的外观?关于这个主题的文件似乎非常稀缺!
没有错误状态,但有一个可以指定的 errorSkin(它必须是 ErrorSkin 的子类吗?)。
我想设置文本输入的背景颜色,并在验证失败时增加边框的粗细。我该怎么做?
这是我最终得到的:
public class ObviousErrorSkin extends ErrorSkin
{
private static var glowFilter:GlowFilter = new GlowFilter(0xFF0000, 0.85, 8, 8, 3, 1, true, true);
private static var rect:Rectangle = new Rectangle();
private static var filterPt:Point = new Point();
override protected function processBitmap():void
{
rect.x = rect.y = 0;
rect.width = bitmap.bitmapData.width;
rect.height = bitmap.bitmapData.height;
glowFilter.color = target.getStyle("errorColor");
bitmap.bitmapData.applyFilter(bitmap.bitmapData, rect, filterPt, glowFilter);
}
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
{
// Early exit if we don't have a target object
if (!target)
return;
super.updateDisplayList(unscaledWidth, unscaledHeight);
graphics.clear();
graphics.beginFill(target.getStyle("errorColor"), 0.25);
graphics.drawRect(bitmap.x, bitmap.y, bitmap.width, bitmap.height);
graphics.endFill();
}
}
您应该使用 errorString 属性来激活错误状态
Flex,有什么方法可以像验证者那样以编程方式突出显示红色字段?
看看这个答案,我想它会帮助你理解
据我所知,没有简单的方法可以实现这一目标。问题是在错误状态组件中不会更改它自己的皮肤,它只是将 errorSkin 的实例添加为新的子级。这是来自SkinnableComponent
的代码
mx_internal function updateErrorSkin():void
{
if (errorString != null && errorString != "" && getStyle("showErrorSkin"))
{
if (!errorObj)
{
var errorObjClass:Class = getStyle("errorSkin");
if (errorObjClass)
errorObj = new errorObjClass();
if (errorObj)
{
if ("target" in errorObj)
errorObj["target"] = this;
super.addChild(errorObj);
}
}
}
else
{
if (errorObj)
super.removeChild(errorObj);
errorObj = null;
}
}
如果要添加 errorSkin 并从SparkSkin
扩展它,它的大小将为零。当然,您可以将其宽度和高度属性设置为父组件,但随后它将与此父组件重叠。
如果您使用的是从ErrorSkin
继承的皮肤,大多数情况下也会发生同样的事情。但是你需要对它bitmap
属性做点什么。它仍然会超过您的主要组件。是的,您可以互换错误皮肤和主皮肤,然后使主皮肤透明,也许可以实现您需要的,但我建议创建自己的组件,如下所示:
TextInputWithError.as
package
{
import spark.components.TextInput;
[SkinState("error")]
public class TextInputWithError extends TextInput
{
public function TextInputWithError()
{
super();
}
protected var useErrorSkin:Boolean;
override public function set errorString(value:String):void
{
super.errorString = value;
setStyle("errorSkin", null);
if (value != "")
useErrorSkin = true;
else
useErrorSkin = false;
invalidateProperties();
}
override protected function commitProperties():void
{
super.commitProperties();
if (useErrorSkin != "")
skin.currentState = "error";
else
skin.currentState = getCurrentSkinState();
}
}
}
TextInputWithErrorSkin.mxml
<?xml version="1.0" encoding="utf-8"?>
<s:SparkSkin xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:fb="http://ns.adobe.com/flashbuilder/2009"
alpha.disabledStates="0.5" blendMode="normal">
<fx:Metadata>
<![CDATA[
/**
* @copy spark.skins.spark.ApplicationSkin#hostComponent
*/
[HostComponent("TextInputWithError")]
]]>
</fx:Metadata>
<s:states>
<s:State name="normal"/>
<s:State name="error"/>
<s:State name="disabled" stateGroups="disabledStates"/>
<s:State name="normalWithPrompt"/>
<s:State name="disabledWithPrompt" stateGroups="disabledStates"/>
</s:states>
<s:Rect id="background" left="1" right="1" top="1" bottom="1">
<s:fill>
<s:SolidColor id="bgFill" color="0xFFFFFF" color.error="0x00FF00" />
</s:fill>
</s:Rect>
<s:Rect left="0" right="0" top="0" bottom="0" id="border">
<s:stroke>
<s:SolidColorStroke id="borderStroke" weight="1" weight.error="2" color.error="0xFF0000" />
</s:stroke>
</s:Rect>
<s:Rect left="1" top="1" right="1" height="1" id="shadow">
<s:fill>
<s:SolidColor color="0x000000" alpha="0.12" />
</s:fill>
</s:Rect>
<s:RichEditableText id="textDisplay"
verticalAlign="middle"
widthInChars="10"
left="1" right="1" top="1" bottom="1" />
<s:Label id="promptDisplay" maxDisplayedLines="1"
verticalAlign="middle"
mouseEnabled="false" mouseChildren="false"
includeIn="normalWithPrompt,disabledWithPrompt"
includeInLayout="false"
/>
</s:SparkSkin>
如果有人能指导我更好地解决这个问题,我将不胜感激,因为我也有=)