No, the issue is exactly what I described: objects that implement IUIComponent (which Canvas does, TextField does not) add a restriction to the inherited (from DisplayObjectContainer) addChild methods. The restriction is that the child *actually* has to implement IUIComponent. This is so the component can call the "measuredHeight", etc., methods to preform layout (whereas a standard DisplayObjectContainer doesn't perform layout and thus doesn't need the additional properties).
What Grant Skinner's blog post describes is really just a *slightly* more verbose version of what Ely posted (with several examples of how to use it in both MXML and AS). It also has the nice upside that if your DisplayObject resizes it can automatically resize the UIComponent. So, go over to Grant's blog and check out the post. It'll clear everything up. The trick with hijacking an image is interesting, but really unnecessary. Grant's solution is only about two dozen lines of code (with comments) and works like a charm (you may need to add one or two checks for nulls for safety's sake depending on your use case, otherwise it seems production ready to me). And the cloning... well, I've got no idea how that would make a difference! ;-) Troy. On 3/21/07, tosadavemgr <[EMAIL PROTECTED]> wrote:
It is interesting that I would get 4 replies, 4 completely different answers. My entire week is going this way. As is my Flex project. So my choices were: 1. Try the Grant Skinner blog and his DisplayObjectWrapper. Not exactly sure how this works or how to use it within my code. 2. Add .clone to my existing syntax, which I tried without luck 3. Have an image load an image and then copy that - interesting, yet I have a canvas loaded with many bitmaps and need to make a bitmap of the canvas ?? 4. And finally, from Ely, and extension of the UIComponent class. I'm sure this is something, but I'm not sure how to use it. I really appreciate the helpful spirit on this message board. My own green-ness with Flex is part of the problem, but I thought for sure my original direction would work since I pulled it almost directly from the Flex docs. Here's the code from Flex Docs: import flash.display.Bitmap; import flash.display.BitmapData; import flash.text.TextField; var tf:TextField = new TextField(); tf.text = "bitmap text"; var myBitmapData:BitmapData = new BitmapData(80, 20); myBitmapData.draw(tf); var bmp:Bitmap = new Bitmap(myBitmapData); this.addChild(bmp); They are copying a TextField rather than a canvas. Is that the issue? OK to turn a TextField into a bitmap, but not a canvas? Dave --- In [email protected] <flexcoders%40yahoogroups.com>, "Ely Greenfield" <[EMAIL PROTECTED]> wrote: > > > > > [DefaultProperty("content")] > class RawContainer extends UIComponent > { > private var _content:Array = []; > public function set content(value:Array):void > { > _content = value; > for(var i:int = 0;i<_content.length;i++) > { > addChildAt(_content[i],i); > } > while(numChildren > _content.length) > removeChildAt(_content.length); > } > public function get content():Array { return _content } > } > > Ely. > > > ________________________________ > > From: [email protected] <flexcoders%40yahoogroups.com> [mailto: [email protected] <flexcoders%40yahoogroups.com>] On > Behalf Of Troy Gilbert > Sent: Wednesday, March 21, 2007 9:42 AM > To: [email protected] <flexcoders%40yahoogroups.com> > Subject: Re: [flexcoders] copying bitmap data > > > > Yeah, the problem is that the Canvas container only allows children that > implement IUIComponent. It would have been real nice if Adobe had > provided a "raw" container that did no layout of its children (but > implemented IUIComponent itself), but they didn't. > > Fortunately, Grant Skinner has provided just such a container... > DisplayObjectWrapper. Check out his blog or Google for it. > > If you wrap your Bitmap with the DisplayObjectWrapper first you'll then > be able to add it (or rather, the DisplayObjectWrapper) to the canvas. > > Troy. > > > > On 21 Mar 2007 08:18:46 -0700, tosadavemgr <[EMAIL PROTECTED] > <mailto:[EMAIL PROTECTED]> > wrote: > > I have a canvas in my layout and the application allows dragging > and > dropping items into the canvas. I need to be able to grab a > bitmap of > the canvas when the user is finished, so I can display the > drawing on > another panel, and in the FlexPrintJob function. > > I've tried using this code, initiated from a button: > > private function myDrawing():void{ > var myBitmapData:BitmapData = new BitmapData(530, 445); > myBitmapData.draw(myWorkspace1); > var bmp:Bitmap = new Bitmap(myBitmapData); > showDrawing.addChild(bmp); //this isn't working > > } > > myWorkspace1 is the ID of the canvas where everything is > dropped. > I have a canvas with the ID=showDrawing that I'd like the bitmap > to > appear in. > Anyone know what I need to add to the above function to get that > done? > > Dave >
