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积少成多Flash(10) - Flex 3.0 状态转换(State), 状态转换的过渡效果(State Transition), 自定义鼠标指针


作者： webabcd


介绍
演示 Flex 3.0 中的转换状态及转换状态中的过度效果，自定义鼠标指针 
  • 状态转换(State) - 对 UI 状态，以某一种编程模型做转换 
  • 状态转换的过渡效果(State Transition) - 设置 UI 状态的转换过程中的过渡效果 
  • 自定义鼠标指针 - 对鼠标指针的样式做自定义设置


在线DEMO
http://www.cnblogs.com/webabcd/archive/2009/11/09/1598980.html  


1、演示 State 的应用
State.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="400" height="300"
        title="State (状态的应用)">

        <mx:states>
                <mx:State name="state2">                        
                             <!--
                                     <mx:AddChild /> - 在指定的关联控件的指定位置新增指定的控件
                                             relativeTo - 关联的控件
                                             position - 在关联控件的指定位置增加控件
                                                     关联控件为元素类型则此处可能的值为：before 或 after    
                                                     关联控件为集合类型则此处可能的值为：firstChild 或 lastChild
                                     <mx:SetProperty /> - 设置指定控件的某属性的值
                                     <mx:RemoveChild /> - 移除指定的控件
                             -->
                        <mx:AddChild relativeTo="{form}" position="lastChild">
                                <mx:FormItem label="Label2:">
                                        <mx:TextInput/>
                                </mx:FormItem>
                        </mx:AddChild>
                        <mx:SetProperty target="{panel}" name="title" value="状态2"/>
                        <mx:RemoveChild target="{toggle}"/>
                                            
                        <mx:AddChild relativeTo="{bar}" position="firstChild">
                                <!--
                                        设置状态为空，即转换到原始状态
                                -->
                                <mx:LinkButton label="转换到状态1" click="this.currentState=''"/>
                        </mx:AddChild>
                </mx:State>
        </mx:states>

        <!--
                以下为 状态1 的 ui
        -->
        <mx:Panel id="panel" title="状态1">
                
                <mx:Form id="form">
                        <mx:FormItem label="Label1:">
                                <mx:TextInput/>
                        </mx:FormItem>
                </mx:Form>
                
                <mx:ControlBar id="bar">                                        
                        <!--
                                ui 状态转换到名为 state2 的 <mx:State />
                        -->
                        <mx:LinkButton id="toggle" label="转换到状态2" click="this.currentState='state2'" />
                </mx:ControlBar>
        </mx:Panel>
        
</mx:Panel>
 
 
2、演示 State Transition 的应用
StateTransition.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="400" height="300"
        title="State Transition (状态过渡的应用)">
        
        <mx:Script>
                <![CDATA[
                        
                        import mx.effects.easing.Bounce;
                        
                ]]>
        </mx:Script>
        
        <!--
                <mx:Transition /> - 用于设置状态转换间的过渡效果
        -->
        <mx:transitions>
                <mx:Transition>
                        <mx:Parallel targets="{[panel, toogleTo1, toogleTo2, formItem]}">
                                <mx:Resize duration="500" easingFunction="Bounce.easeOut"/>
                                <mx:Sequence target="{formItem}">
                                        <mx:Blur duration="200" blurYFrom="1.0" blurYTo="20.0"/>
                                        <mx:Blur duration="200" blurYFrom="20.0" blurYTo="1"/>
                                 </mx:Sequence>
                        </mx:Parallel>
                </mx:Transition>
        </mx:transitions>
        
        <!--
                以下关于状态转换的部分参见 State.mxml
        -->
        <mx:states>
                <mx:State name="state2">                        
                        <mx:AddChild relativeTo="{form}" position="lastChild">
                                <mx:FormItem id="formItem" label="Label2:">
                                        <mx:TextInput/>
                                </mx:FormItem>
                        </mx:AddChild>
                        
                        <mx:SetProperty target="{panel}" name="title" value="状态2"/>
        
                        <mx:RemoveChild target="{toogleTo2}"/>
                                            
                        <mx:AddChild relativeTo="{bar}" position="firstChild">
                                <mx:LinkButton id="toogleTo1" label="转换到状态1" click="this.currentState=''"/>
                        </mx:AddChild>
                </mx:State>
        </mx:states>

        <mx:Panel id="panel" title="状态1">
                
                <mx:Form id="form">
                        <mx:FormItem label="Label1:">
                                <mx:TextInput/>
                        </mx:FormItem>
                </mx:Form>
                
                <mx:ControlBar id="bar">                                        
                        <mx:LinkButton id="toogleTo2" label="转换到状态2" click="this.currentState='state2'" />
                </mx:ControlBar>
        </mx:Panel>
        
</mx:Panel>
 
 
3、演示如何自定义鼠标指针
Cursor.mxml
<?xml version="1.0" encoding="utf-8"?>
<mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="400" height="300"
        title="Cursor 自定义鼠标指针">
        
            <mx:Script>
                <![CDATA[

                        import mx.managers.CursorManager;

                        // 以 类 的形式引用内嵌资源。（另一种以字符串的形式引用内嵌资源的方式：@Embed('p_w_picpaths/logo.png')）
                        [Embed(source="p_w_picpaths/logo.png")]
                        private var customCursor:Class;    
                        
                        private function cursorChange(e:Event):void
                        {
                                switch (radioGroup.selectedValue)
                                {
                                        // 正常时候的鼠标指针
                                        case "Normal" :
                                                CursorManager.removeAllCursors();
                                                break;
                                        // 繁忙时，鼠标指针的样式
                                        case "Busy" :
                                                CursorManager.removeAllCursors();
                                                CursorManager.setBusyCursor();
                                                break;
                                        // 自定义鼠标指针的样式
                                        case "Custom" :
                                                CursorManager.removeAllCursors();                                        
                                                CursorManager.setCursor(customCursor);
                                        default :
                                                break;
                                }
                        }
                                                
                ]]>
        </mx:Script>
        
        <mx:RadioButtonGroup id="radioGroup" change="cursorChange(event);"/>
        <mx:RadioButton x="10" y="10" label="普通指针" value="Normal" groupName="radioGroup" selected="true"/>
        <mx:RadioButton x="10" y="36" label="繁忙指针" value="Busy" groupName="radioGroup"/>
        <mx:RadioButton x="10" y="62" label="自定义指针" value="Custom" groupName="radioGroup"/>

</mx:Panel>