[Drawkit] DXF Import Progress / Example

[Allan]

Thanks for your feedback, Graham and Brad.

I tried to use this approach to zoom the drawing view to show all of  
my imported DXF object  on the screen at one time. My application is  
based on the DK Simple Demo program, so mDrawingView here is just the  
same as defined in the DKSDController object and "dxfLayer" is the  
layer that I'm using to hold the imported DXF objects.

[mDrawingView zoomViewToRect: [dxfLayer unionOfAllObjectBounds]];

It does not work and the following NSLog is reported in the debugger  
console window.

2009-01-22 21:28:24.627 DKSimpleDXF[345:10b] *** -[NSView  
documentVisibleRect]: unrecognized selector sent to instance 0x10283e0

 From a bit of looking around it seems that only NSScrollView and  
NSClipView from the AppKit implement the "documentVisibleRect" method.  
In the DK Simple Demo application there is no object containing the  
DKDrawingView that responds to this method -- so the method fails.

Does that make sense? Is the DK Simple Demo application not set up to  
be able to use these zoom commands?

-Allan

 >>>>>>>>>>>>>>>>>>>>

> Brad suggests using -zoomFitInWindow: which will work if the drawing  
> size is set to the extents of the objects. But if your question is  
> about how to zoom to the objects that exist ignoring the drawing  
> size (for example if your objects are all clustered in one corner)  
> then you'll probably find that -zoomViewToRect: would be more  
> useful. You'll have to supply a suitable rect, either by calculating  
> it as you work through importing your objects or afterwards by  
> iterating over them and forming the union of their bounds - a  
> helpful method for doing this is [DKObjectOwnerLayer  
> unionOfAllObjectBounds];

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