作者:筷子 | 来源:互联网 | 2023-05-20 16:45
原文地址:http:www.iteye.comtopic773679分组框(GroupBox)是围绕在一组相关控件周围的带标签的矩形边框。它提供了一种通过视觉展示控件关系的方法。如
分组框(Group Box)是围绕在一组相关控件周围的带标签的矩形边框。它提供了一种通过视觉展示控件关系
的方法。如下图所示:
本文将通过以下几步来实现:
一、继承SkinnableContainer,创建组件类GroupBox。
二、声明外观部件titleDisplay用来显示组合框的标题。
三、增加title属性。
四、覆盖partAdded方法,使标题字符串能够作用于外观部件titleDisplay。
五、创建它的默认外观(皮肤)GroupBoxSkin。
六、为GroupBox增加必要样式。
—————
一、继承SkinnableContainer,创建组件类GroupBox。
Actionscript 3.0代码
- public class GroupBox extends SkinnableContainer
- {
- public function GroupBox()
- {
- super();
- }
- }
二、声明外观部件titleDisplay用来显示组合框的标题。
Actionscript 3.0代码
- [SkinPart(required=“false”)]
- public var titleDisplay:TextBase;
三、增加title属性。
Actionscript 3.0代码
- private var _title:String = “”;
- [Bindable]
- public function get title():String
- {
- return _title;
- }
- public function set title(value:String):void
- {
- _title = value;
-
- if (titleDisplay)
- titleDisplay.text = title;
- }
四、覆盖partAdded方法,使标题字符串能够作用于外观部件titleDisplay。
Actionscript 3.0代码
- override protected function partAdded(partName:String, instance:Object):void
- {
- super.partAdded(partName, instance);
-
- if (instance == titleDisplay)
- {
- titleDisplay.text = title;
- }
- }
至此,GroupBox组件类基本创建完成,但是还不能显示。下面来创建它的默认外观(皮肤)GroupBoxSkin。
五、创建它的默认外观(皮肤)GroupBoxSkin。
第一步,创建组合框的边框。
Actionscript 3.0代码
-
- “border” left=“0” right=“0” top=“10” bottom=“0”
- radiusX=“4” radiusY=“4”
- >
-
- “borderStroke” weight=“1”/>
-
-
第二步,创建外观部件titleDisplay。
Mxml代码
-
- “titleDisplay”
- maxDisplayedLines=“1”
- left=“9” top=“0”
- minhttps://img.php1.cn/3cd4a/1eebe/cd5/1113165c4904ecc5.webp" src="https://img.php1.cn/3cd4a/1eebe/cd5/1113165c4904ecc5.webp" alt="《Flex4实现分组框GroupBox》" />
图2
从上图,可以看出现在组合框的标题文字与边框是重叠的,显然这不符合我们的要求。
为了解决这个问题,下面要为边框创建一个遮罩。
Mxml代码
-
- “borderGroupMask” left=“0” right=“0” top=“0” bottom=“0”>
- “0” https://img.php1.cn/3cd4a/1eebe/cd5/7494af3c1cda418d.webp" src="https://img.php1.cn/3cd4a/1eebe/cd5/7494af3c1cda418d.webp" alt="《Flex4实现分组框GroupBox》" />
图3
完整的文件如下:
1 GroupBox.as
Actionscript 3.0代码
- package jx.components
- {
- import spark.components.SkinnableContainer;
- import spark.components.supportClasses.TextBase;
- /**
- * The alpha of the border for this component.
- *
- * @default 0.5
- *
- * @langversion 3.0
- * @playerversion Flash 10
- * @playerversion AIR 1.5
- * @productversion Flex 4
- */
- [Style(name=“borderAlpha”, type=“Number”, inherit=“no”, theme=“spark”)]
-
- /**
- * The color of the border for this component.
- *
- * @default 0
- *
- * @langversion 3.0
- * @playerversion Flash 10
- * @playerversion AIR 1.5
- * @productversion Flex 4
- */
- [Style(name=“borderColor”, type=“uint”, format=“Color”, inherit=“no”, theme=“spark”)]
- /**
- * The radius of the corners for this component.
- *
- * @default 5
- *
- * @langversion 3.0
- * @playerversion Flash 10
- * @playerversion AIR 1.5
- * @productversion Flex 4
- */
- [Style(name=“cornerRadius”, type=“Number”, format=“Length”, inherit=“no”, theme=“spark”)]
-
- public class GroupBox extends SkinnableContainer
- {
- public function GroupBox()
- {
- super();
- }
- //———————————-
- // titleField
- //———————————-
-
- [SkinPart(required=“false”)]
-
- /**
- * 定义容器中标题文本的外观的外观部件。
- *
- * @see jx.skins.GroupBoxSkin
- *
- * @langversion 3.0
- * @playerversion Flash 10
- * @playerversion AIR 1.5
- * @productversion Flex 4
- */
- public var titleDisplay:TextBase;
-
-
- //———————————-
- // title
- //———————————-
-
- /**
- * @private
- */
- private var _title:String = “”;
-
- /**
- * @private
- */
- private var titleChanged:Boolean;
-
- [Bindable]
-
- /**
- * 标题或者说明。
- * @default “”
- * @langversion 3.0
- * @playerversion Flash 10
- * @playerversion AIR 1.5
- * @productversion Flex 4
- */
- public function get title():String
- {
- return _title;
- }
-
- /**
- * @private
- */
- public function set title(value:String):void
- {
- _title = value;
-
- if (titleDisplay)
- titleDisplay.text = title;
- }
- override protected function partAdded(partName:String, instance:Object):void
- {
- super.partAdded(partName, instance);
-
- if (instance == titleDisplay)
- {
- titleDisplay.text = title;
- }
- }
- }
- }
2 GroupBoxSkin.mxml
Mxml代码
- “1.0” encoding=“utf-8”?>
- “http://ns.adobe.com/mxml/2009”
- xmlns:mx=“library://ns.adobe.com/flex/mx”
- xmlns:s=“library://ns.adobe.com/flex/spark”
- xmlns:fb=“http://ns.adobe.com/flashbuilder/2009”
- alpha.disabled=“0.5”>
-
- [HostComponent(“jx.components.GroupBox”)]
-
-
- “styling”>
- static private const exclusions:Array = [“titleDisplay”, “contentGroup”];
-
- /**
- * @private
- */
- override public function get colorizeExclusions():Array {
- return exclusions;
- }
-
- /**
- * @private
- */
- override protected function initializationComplete():void
- {
- useChromeColor = true;
- super.initializationComplete();
- }
- private var cornerRadius:Number;
- /**
- * @private
- */
- override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void
- {
- var cr:Number = getStyle(“cornerRadius”);
- if (cornerRadius != cr)
- {
- cornerRadius = cr; // 取变量
- border.topLeftRadiusX = cornerRadius;
- border.topRightRadiusX = cornerRadius;
- border.bottomLeftRadiusX = cornerRadius;
- border.bottomRightRadiusX = cornerRadius;
- }
-
- borderStroke.color = getStyle(“borderColor”);
- borderStroke.alpha = getStyle(“borderAlpha”);
- //
- super.updateDisplayList(unscaledWidth, unscaledHeight);
- }
-
-
-
- “normal” />
- “disabled” />
-
-
- “borderGroupMask” left=“0” right=“0” top=“0” bottom=“0”>
- “0” GroupBox {
- skinClass: ClassReference(“jx.skins.GroupBoxSkin”);
- cornerRadius: 5;
- borderColor: #104778;
- borderWeight: 1;
- dropShadowVisible: false;
- }
5 代码方式指定组件的默认CSS样式
Actionscript3.0代码
- private static const classConstructed:Boolean = classConstruct();
-
- // 指定默认样式
- private static function classConstruct():Boolean {
- var styleManager:IStyleManager2 = FlexGlobals.topLevelApplication.styleManager;
- if (!styleManager.getStyleDeclaration(“jx.components.GroupBox”)) {
- var css:CSSStyleDeclaration = new CSSStyleDeclaration(null, styleManager);
- css.defaultFactory = function():void {
- this.skinClass = GroupBoxSkin;
- this.borderAlpha = 1;
- this.borderColor = 0; // 黑
- // this.borderColor = 0xD3D3D3; // 灰
- // this.borderColor = 0x104778; // 蓝
- this.cornerRadius = 5;
- // this.dropShadowVisible = true;
- // this.borderWeight = 1;
- }
- styleManager.setStyleDeclaration(“jx.components.GroupBox”, css, true);
- }
- return true;
- }
完整的项目请下载附件GroupBoxExam.zip。
- GroupBoxExam.zip (4.9 KB)
- 下载次数: 731