[Drawkit] Drawkit Digest, Vol 9, Issue 1

[Bill Monk]

Hi. I've been following this list with interest since its inception,  
but have only now had a chance to use DrawKit in a project.

I'd like to use it as a rather basic "polygon editor" for four  
NSPoints supplied by the user. Using DrawkitSimplerDemo, I've got a  
window up which works fine. (Fine? It works great! The number of  
features is amazing - most of my work was in removing things not  
required but this simple editor.)

What I need to do now is
1) programmatically create an initial polygon from the supplied points  
users.
2) When the window closes, I need to get the (possibly edited) points  
back out.


Basically I have something like this...

================================
@interface EXShape : NSManagedObject
{
}

@property (retain) NSString * displayName;

// (x,y,z) points, but all we care about is (x,y)
@property (retain) CIVector * topLeft;
@property (retain) CIVector * bottomLeft;
@property (retain) CIVector * topRight;
@property (retain) CIVector * bottomRight;
================================

and want to do something like this...

#import <GCDrawKit/DKDrawKit.h>
#import "DrawKitWindowController.h"

@interface ShapeWindowController : DKSDController {
	EXShape *shapeNode;
}

@property (retain) EXShapeNode * shapeNode;

- (id)initWithShapeNode:(EXShape *)shape;

@end
================================

@implementation ShapeWindowController

@synthesize		shapeNode;

//
// designated intializer
//
- (id)initWithShapeNode:(EXShape *)shape;
{	
	if (self = [super initWithWindowNibName:@"ShapeWindow"]) {
		self.shapeNode = shape;
	}
	return self;
}

- (void)windowDidLoad
{
	self.window.title = self.shapeNode.displayName;
}

- (void)awakeFromNib
{
	// In here, want to select the polygon tool...
	// From the docs, seems like this should work,
	// but nothing happens and there are no log messages.
	DKDrawingTool* tool = [DKDrawingTool drawingToolWithName:@"Polygon"];
	[tool set];

	// From docs, seems this might work as well
	// [[mDrawingView controller] selectDrawingToolWithName:@"Polygon"];
	// however I get a warning 'DKViewController' may not respond to '- 
selectDrawingToolWithName:'
	// which is odd : we are a subclass of DKViewController


	// Then, create an initial polygon from in DKDrawing (x, y) values of  
four CIVectors
	// in self.shapeNode.topLeft, etc.

}

- (void)windowWillClose
{
	// get vertices of polygon in the DKDrawing
	// store them into (x, y) values of self.shapeNode.topLeft, etc.
}
	
- (void)dealloc
{
	[shapeNode release];
	[super dealloc];
}

@end

... but after reading the docs and perusing the code, I'm still  
stumped. Can anyone point me in the right direction?