我使用graphics
类对象来绘制BorderContainer。有些绘图从组件边界脱落,但它们仍然绘制在屏幕上。有什么方法可以剪切用图形绘制的区域吗?
应该使用什么组件呢?我需要最简单的东西,我可以在Flex中绘制,并能够添加标签,以及
如果你正在为BorderContainer设置皮肤,只需在皮肤上将clipandenablesrolling设置为true。
<?xml version="1.0" encoding="utf-8"?>
<s:Skin xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
clipAndEnableScrolling="true">
<!-- host component -->
<fx:Metadata>
[HostComponent("spark.components.BorderContainer")]
</fx:Metadata>
<!-- states -->
<s:states>
<s:State name="disabled" />
<s:State name="normal" />
</s:states>
<!-- SkinParts
name=contentGroup, type=spark.components.Group, required=false
-->
</s:Skin>
如前所述,Group或spritvisualelement是易于绘制的。此外,如果需要的话,遮罩也会很好。
你需要Spark标签还是只是TextFields?
也许创建一个spark.components. skinnableconcontainer你可以应用皮肤类将是理想的?
实现 - Skinnable Container设置您绘制的皮肤,并将您的MXML内容放置在其中:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
minWidth="955"
minHeight="600"
xmlns:local="*">
<!-- do you drawing in the skin -->
<local:ExampleContainer skinClass="ExampleSkin">
<!-- apply content as needed -->
<s:Label text="My Text" />
<!-- etc... each instance custom content -->
</local:ExampleContainer>
</s:Application>
<<p> 例子容器/strong> <?xml version="1.0" encoding="utf-8"?>
<s:SkinnableContainer xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
width="400"
height="300"
skinClass="ExampleSkin">
</s:SkinnableContainer>
示例皮肤 -在这里绘制
<?xml version="1.0" encoding="utf-8"?>
<!--- The default skin class for a Spark SkinnableContainer container.
@see spark.components.SkinnableContainer
@langversion 3.0
@playerversion Flash 10
@playerversion AIR 1.5
@productversion Flex 4
-->
<s:Skin 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.disabled="0.5">
<fx:Metadata>
<![CDATA[
/**
* @copy spark.skins.spark.ApplicationSkin#hostComponent
*/
[HostComponent("spark.components.SkinnableContainer")]
]]>
</fx:Metadata>
<fx:Script fb:purpose="styling">
<![CDATA[
/**
* @private
*/
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number) : void
{
// Push backgroundColor and backgroundAlpha directly.
// Handle undefined backgroundColor by hiding the background object.
if (isNaN(getStyle("backgroundColor")))
{
background.visible = false;
}
else
{
background.visible = true;
bgFill.color = getStyle("backgroundColor");
bgFill.alpha = getStyle("backgroundAlpha");
}
super.updateDisplayList(unscaledWidth, unscaledHeight);
}
]]>
</fx:Script>
<s:states>
<s:State name="normal" />
<s:State name="disabled" />
</s:states>
<!--- Defines the appearance of the SkinnableContainer class's background. -->
<s:Rect id="background" left="0" right="0" top="0" bottom="0">
<s:fill>
<!--- @private -->
<s:SolidColor id="bgFill" color="#FFFFFF"/>
</s:fill>
</s:Rect>
<!--
Note: setting the minimum size to 0 here so that changes to the host component's
size will not be thwarted by this skin part's minimum size. This is a compromise,
more about it here: http://bugs.adobe.com/jira/browse/SDK-21143
-->
<!--- @copy spark.components.SkinnableContainer#contentGroup -->
<s:Group id="contentGroup" left="0" right="0" top="0" bottom="0" minWidth="0" minHeight="0">
<s:layout>
<s:BasicLayout/>
</s:layout>
</s:Group>
</s:Skin>
限制绘图到给定区域,尝试使用mask属性(DisplayObject
的每个子类都有它)。它的创建正是为了做你所要求的。
在最简单的IVisualElementContainer上,尝试使用Group。
你能做的就是使用SpriteVisualElement来绘制,设置它的宽度和高度为100%,并把它放在组。然后启用Group的属性 clipandenablesrolling ,就可以了。您还可以将标签作为元素添加到组中:]
下面是一个示例代码:<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx"
creationComplete="onCreationComplete(event)">
<fx:Script>
<![CDATA[
import mx.controls.Label;
import mx.events.FlexEvent;
import spark.core.SpriteVisualElement;
protected function onCreationComplete(event:FlexEvent):void
{
var spriteVisualElement:SpriteVisualElement = new SpriteVisualElement();
spriteVisualElement.percentWidth = 100;
spriteVisualElement.percentHeight = 100;
spriteVisualElement.graphics.beginFill(0xFFAABB);
spriteVisualElement.graphics.drawCircle(0, 0, 50);
spriteVisualElement.graphics.endFill();
myContainer.addElement(spriteVisualElement);
var helloWorldLabel:Label = new Label();
helloWorldLabel.text = "Hello world!";
myContainer.addElement(helloWorldLabel);
}
]]>
</fx:Script>
<fx:Declarations>
</fx:Declarations>
<s:Group id="myContainer"
width="100"
height="100"
horizontalCenter="0" verticalCenter="0"
clipAndEnableScrolling="true"/>
</s:Application>
希望有帮助,
火灾注:你可以利用的最简单的东西(据我所知)是Sprite类,但Sprite不是IVisualElement。
来自Flex文档:
SpriteVisualElement类是IVisualElement接口的基于sprite的轻量级实现。Spark容器可以布局和渲染SpriteVisualElement对象
另一个解决方案是尝试用spark原语(s:Rect, s:Line, s:Path, s:Ellipse等)绘制你想要的东西