Question

我正在尝试使用mxml文件中的ActionScript DataGrid组件。但它给我一些错误。

以下是我的主要申请文件。

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:local="*" xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical">



    <mx:Metadata>
        [Event(name="myEvent", type="flash.events.Event")]
    </mx:Metadata>


    <mx:Button label="Button"/>
    <mx:Array id="arr">
            <mx:Object From="Phill" Subject="GMC-1 Release" Date="12/08/06" CC="Jim"  Profit="69" />
            <mx:Object From="Harry" Subject="GMC-1 Release" Date="12/08/06 11111111" CC="Ram"  Profit="10" />
            <mx:Object From="Barb" Subject="GMC-1 Release" Date="12/08/06" CC="Anant"  Profit="20" />
            <mx:Object From="Amit" Subject="GMC-1 Release" Date="12/07/06" CC="Jim"  Profit="28" />
            <mx:Object From="Sam" Subject="GMC-1 Release" Date="12/08/06" CC="Jim"  Profit="17" />
            <mx:Object From="Phill" Subject="GMC-2 Release" Date="12/11/06" CC="Jim" Profit="10" />
            <mx:Object From="John" Subject="Grid scrolling" Date="12/10/06" CC="Craig" Profit="20" />
            <mx:Object From="Bob" Subject="ItemRenderers" Date="12/10/06" CC="Moxie" Profit="11" />            
</mx:Array>

<local:AutoResizableADG id="adg" dataProvider="{arr}" width="400" height="400" >
    <local:columns>
        <mx:AdvancedDataGridColumn headerText="From" dataField="From" width="50" />
        <mx:AdvancedDataGridColumn headerText="Subject" dataField="Subject" width="50" />
        <mx:AdvancedDataGridColumn headerText="Date" dataField="Date" width="70" />
        <mx:AdvancedDataGridColumn headerText="CC" dataField="CC" />
    </local:columns>

</local:AutoResizableADG>

</mx:Application>

和AutoResizableADG.as文件在同一个包中..即src /（default-package）

// ActionScript file

package     // Line where it is showing error.
{

    import flash.display.DisplayObject;
    import flash.events.MouseEvent;
    import flash.text.TextLineMetrics;

    import mx.controls.AdvancedDataGrid;
    import mx.controls.Alert;
    import mx.controls.listClasses.IDropInListItemRenderer;
    import mx.core.IUIComponent;
    import mx.core.UIComponent;

    public class AutoResizableADG extends AdvancedDataGrid
    {
        var sepArray:Array = new Array();
        public function AutoResizableADG()
        {
            // call super
            super();
        }

        /**
         *  Returns the header separators between column headers, 
         *  and populates the <code>separators</code> Array with the separators returned.
         * 
         *  @param i The number of separators to return.
         *
         *  @param seperators Array to be populated with the header objects.
         *
         *  @param headerLines The parent component of the header separators. 
         *  Flex calls the <code>headerLines.getChild()</code> method internally to return the separators.
         */
        override protected function getSeparator(i:int, seperators:Array, headerLines:UIComponent):UIComponent
        {

            var sep:UIComponent = super.getSeparator(i, seperators, headerLines);
            sep.doubleClickEnabled = true;
            // Add listener for Double Click
            DisplayObject(sep).addEventListener(myEvent.myEvent, hello);
            //          Alert.show(""+sep);
            sepArray.push(sep);
            return sep;
        }

        public function getListItems():Array{
            return listItems;
        }

        /**
         *  @private
         *  Indicates where the right side of a resized column appears.
         */
        public function hello(event:UIComponent):void
        {
            // check if the ADG is enabled and the columns are resizable
            if (!enabled || !resizableColumns)
                return;

            var target:DisplayObject = DisplayObject(event);
            var index:int = target.parent.getChildIndex(target);
            // get the columns array
            var optimumColumns:Array = getOptimumColumns();

            // check for resizable column
            if (!optimumColumns[index].resizable)
                return;

            // calculate the maxWidth - we can optimize this calculation
            if(listItems)
            {
                var len:int = listItems.length;
                var maxWidth:int = 0;
                for(var i:int=0;i<len;i++)
                {
                    if(listItems[i][index] is IDropInListItemRenderer)
                    {
                        var lineMetrics:TextLineMetrics = measureText(IDropInListItemRenderer(listItems[i][index]).listData.label);
                        if(lineMetrics.width > maxWidth)
                            maxWidth = lineMetrics.width ;
                    }
                }
            }

            // set the column's width
            optimumColumns[index].width = maxWidth + getStyle("paddingLeft") + getStyle("paddingRight") + 8;
        }
    }
}

它向我显示了ActionScript文件中的错误....

"Packages cannot be nested"

为什么会这样？有什么问题？

Answer 1

我不确定为什么它没有编译，但你是否尝试将AutoResizableADG.as放入实际包中以查看它是否解决了问题？

E.g。

// ActionScript file

package myPackage
{
import flash.display.DisplayObject;
import flash.events.MouseEvent;
import flash.text.TextLineMetrics;

import mx.controls.AdvancedDataGrid;
import mx.controls.Alert;
import mx.controls.listClasses.IDropInListItemRenderer;
import mx.core.IUIComponent;
import mx.core.UIComponent;

public class AutoResizableADG extends AdvancedDataGrid
{
     ....

Answer 2

这种行为我称之为古怪，但记录在案。我发现了两个问题：

weltraumpirat是正确的。尝试清理你的代码。
如果你在flashdevelop中，你可以删除myPackge参考，再次测试项目，当它显示下一个错误时，撤消改变，它会接受它。

两种方法都以相同的原则运作祝你好运！

包不能嵌套 - as3

2 个答案: