在我的flex 4项目中，我为各种按钮定义了自定义皮肤（ToggleButtons，简单按钮等）。它使用特殊的样式属性来定义按钮是否具有内部发光。我定义了名为“normal”的css样式，当鼠标悬停在按钮上时会发光：
.normal:up {
fillColors: #FFFFFF, #F5F5F5, #E1E1E1, #C4C4C4;
fillRatios: 0.0, 0.5, 0.87, 1.0;
borderColors: #E4E4E4, #A5A5A5;
borderRatios: 0.0, 1.0;
}
.normal:over {
fillColors: #FFFFFF, #ECF9FF, #C3E8FA;
fillRatios: 0.0, 0.5, 1.0;
borderColors: #E4E4E4, #A5A5A5;
borderRatios: 0.0, 1.0;
hasInnerGlow: true;
innerGlowColor: #88CCF4;
}
这是ButtonBase皮肤：
<?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" minWidth="21" minHeight="21" alpha.disabled="0.5">
<fx:Metadata>
<![CDATA[
[HostComponent("spark.components.supportClasses.ButtonBase")]
]]>
</fx:Metadata>
<fx:Script fb:purpose="styling">
<![CDATA[
import flashx.textLayout.formats.TextAlign;
import mx.graphics.GradientEntry;
import spark.filters.DropShadowFilter;
import spark.filters.GlowFilter;
static private const exclusions:Array = ["labelDisplay","fill"];
override public function get colorizeExclusions():Array {return exclusions;}
override protected function initializationComplete():void {
useChromeColor = false;
super.initializationComplete();
}
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number) : void {
updateCorners();
updateFill();
updateBorders();
updateShadowAndGlow();
updateIconAndLabel();
super.updateDisplayList(unscaledWidth, unscaledHeight);
}
private function updateCorners():void {
var tlR:Number = getStyle("topLeftRadius");
var blR:Number = getStyle("bottomLeftRadius");
var trR:Number = getStyle("topRightRadius");
var brR:Number = getStyle("bottomRightRadius");
fill.topLeftRadiusX = tlR;
fill.bottomLeftRadiusX = blR;
fill.topRightRadiusX = trR;
fill.bottomRightRadiusX = brR;
border.topLeftRadiusX = tlR+1;
border.bottomLeftRadiusX = blR+1;
border.topRightRadiusX = trR+1;
border.bottomRightRadiusX = brR+1;
}
private function updateShadowAndGlow():void {
var hasShadow:Boolean = getStyle("hasShadow");
var shadowColor:uint = getStyle("shadowColor");
var hasInnerGlow:Boolean = getStyle("hasInnerGlow");
var innerGlowColor:uint = getStyle("innerGlowColor");
var hasLabelShadow:Boolean = getStyle("hasLabelShadow");
var labelShadowColor:uint = getStyle("labelShadowColor");
var filters:Array = new Array();
var fillFilters:Array = new Array();
var labelFilters:Array = new Array();
if (hasShadow){
filters.push(new DropShadowFilter(2.0,90,shadowColor,1.0,1.0,4.0));
}
if (hasInnerGlow){
fillFilters.push(new GlowFilter(innerGlowColor,1.0,1.0,4.0,1,1,true));
}
if (hasLabelShadow) {
labelFilters.push(new DropShadowFilter(2.0,-90,labelShadowColor,1.0,1.0,2.0));
}
this.filters = filters;
fill.filters = fillFilters;
labelDisplay.filters = labelFilters;
}
private function updateFill():void {
var colors:Array = hostComponent.getStyle("fillColors");
var ratios:Array = hostComponent.getStyle("fillRatios");
if (colors && ratios && colors.length == ratios.length){
var entries:Array = new Array();
var entry:GradientEntry;
for (var i:uint = 0; i < colors.length; i++){
entry = new GradientEntry(colors[i],ratios[i]);
entries.push(entry);
}
fillGradient.entries = entries;
}
}
private function updateBorders():void {
var borderColors:Array = hostComponent.getStyle("borderColors");
var borderRatios:Array = hostComponent.getStyle("borderRatios");
if (borderColors && borderRatios && borderColors.length == borderRatios.length){
var entries:Array = new Array();
var entry:GradientEntry;
for (var i:uint = 0; i < borderColors.length; i++){
entry = new GradientEntry(borderColors[i],borderRatios[i]);
entries.push(entry);
}
borderGradient.entries = entries;
}
else {
border.includeInLayout = false;
}
}
private function updateIconAndLabel():void {
var icon:Object = getStyle("icon");
var data:Object = null;
if (hostComponent.hasOwnProperty("data"))
data = hostComponent["data"];
if (data && data.hasOwnProperty("icon")){
icon = data.icon;
}
if (icon){
img.source = icon;
}
else {
img.includeInLayout = false;
}
if (hostComponent.label && hostComponent.label.length > 0) {
if (icon == null){
labelDisplay.setStyle("textAlign",TextAlign.CENTER);
}
else if (getStyle("iconPosition") == "right") {
labelDisplay.setStyle("textAlign",TextAlign.RIGHT);
content.swapElements(img,labelDisplay);
}
else {
labelDisplay.setStyle("textAlign",TextAlign.LEFT);
}
}
else {
labelDisplay.includeInLayout = false;
}
content.paddingLeft = getStyle("padding");
content.paddingRight = getStyle("padding");
}
]]>
</fx:Script>
<!-- states -->
<s:states>
<s:State name="up" />
<s:State name="over" />
<s:State name="down" />
<s:State name="disabled" />
<s:State name="upAndSelected" />
<s:State name="overAndSelected" />
<s:State name="downAndSelected" />
<s:State name="disabledAndSelected" />
</s:states>
<s:Rect
id="border" left="0" right="0" top="0" bottom="0"
topLeftRadiusX="0" bottomLeftRadiusX="0" topRightRadiusX="0" bottomRightRadiusX="0">
<s:fill>
<s:LinearGradient id="borderGradient" rotation="90"/>
</s:fill>
</s:Rect>
<s:Rect id="fill" left="1" right="1" top="1" bottom="1"
topLeftRadiusX="0" bottomLeftRadiusX="0" topRightRadiusX="0" bottomRightRadiusX="0">
<s:fill>
<s:LinearGradient rotation="90" id="fillGradient"/>
</s:fill>
</s:Rect>
<s:HGroup id="content" gap="3" paddingLeft="4" paddingRight="4" paddingTop="2" paddingBottom="2" left="0" right="0"
verticalCenter="0" verticalCenter.down="1" verticalAlign="middle" horizontalCenter="0" horizontalAlign="center">
<s:BitmapImage id="img" verticalCenter="0"/>
<s:Label id="labelDisplay" width="100%" verticalAlign="middle" maxDisplayedLines="1" paddingTop="1"/>
</s:HGroup>
</s:SparkSkin>
这是我的自定义按钮类：
package {
import spark.components.Button;
[Style(name="icon",type="*")]
//Corner styles
[Style(name="topLeftRadius",type="Number")]
[Style(name="bottomLeftRadius",type="Number")]
[Style(name="topRightRadius",type="Number")]
[Style(name="bottomRightRadius",type="Number")]
//Colors
[Style(name="fillColors",type="Array",format="Color")]
[Style(name="fillRatios",type="Array")]
[Style(name="borderColors",type="Array",format="Color")]
[Style(name="borderRatios",type="Array")]
[Style(name="hasShadow",type="Boolean")]
[Style(name="innerGlowColor",type="Number",format="Color")]
[Style(name="hasInnerGlow",type="Boolean")]
[Style(name="labelShadowColor",type="Number",format="Color")]
[Style(name="hasLabelShadow",type="Boolean")]
[Style(name="iconPosition", type="String", enumeration="left,right")]
[Style(name="padding", type="Number")]
public class CustomButton extends Button {
public function CustomButton() {
super();
}
}
}
使用flex sdk 4.1，一切正常，但是当使用flex 4.5.1鼠标光标越过按钮边框并导致按钮闪烁时，会多次触发mouse_over事件。
我无法弄清楚sdk中的哪些变化会导致此问题。 请帮我摆脱这种眨眼。
答案 0 :(得分：0)
对于你的皮肤，尝试扩展 SparkButtonSkin 类而不是 SparkSkin 。
我建议你使用 iconDisplay 皮肤部分代替 img ，除非它正在用于其他目的。
注意：还要注意SparkButtonSkin的 autoIconManagement 属性，如果您在皮肤中手动管理iconDisplay的定位。