Let me explain how we are handling grouped objects. We have only one basic type of draw object with a dictionary of characteristics. That gives a lot of flexibility. We do not let objects draw themselves. Instead, we use a separate rendering object. This results in a clean object data model. (Hopefully, this will help when we do Windows.)
We use an object of type "group" to replace grouped objects. When the renderer encounters a "group" type object, it creates another temporary renderer object that draws the group. This allows recursion for groups. Of course, the group object has to compute it's own bounds, including internal and total rotations. So far, this works quite well and we haven't encountered the problem you have had. > Message: 4 > Date: Wed, 2 Apr 2008 16:30:42 +0530 > From: "Ghufran Ahamad" <[EMAIL PROTECTED]> > Subject: Problem with Grouping the rotated object. > To: <cocoa-dev@lists.apple.com> > Message-ID: <[EMAIL PROTECTED]> > Content-Type: text/plain; charset="us-ascii" > > Hi All, > > > > We are developing a kind of drawing application in Objective C using Cocoa > framework. We have several separate graphical objects, each having their own > position and rotation angle, are then grouped. As soon as we group the > objects the rotated object has got shift with their angle. This happen only > with rotated object. Below is the code snippet that we are using. > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [EMAIL PROTECTED]
