Add tagForLayerContainingPoint:

This is meant for subclasses which need to translate an NSPoint to a layer and cannot rely on the normal handling of this in the superclass.

Frameworks/OakAppKit/src/OakControl.h

@@ -90,6 +90,7 @@ struct layer_t
 - (uint32_t)currentState;
 - (void)setLayout:(std::vector<layer_t> const&)aLayout;
 - (void)sendAction:(SEL)action fromLayer:(layer_t const&)aLayer;
+- (NSInteger)tagForLayerContainingPoint:(NSPoint)aPoint;
 @property (nonatomic, readonly) NSInteger tag; // tag of the most recent layer causing an action
 @property (nonatomic, assign) BOOL mouseTrackingDisabled;
 @end

Frameworks/OakAppKit/src/OakControl.mm

@@ -126,6 +126,17 @@ OAK_DEBUG_VAR(OakControl);
 	return YES;
 }
 
+- (NSInteger)tagForLayerContainingPoint:(NSPoint)aPoint
+{
+	NSInteger res = NSNotFound;
+	iterate(it, layout)
+	{
+		if(NSMouseInRect(aPoint, it->rect, [self isFlipped]))
+			res = it->tag;
+	}
+	return res;
+}
+
 - (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent*)event
 {
 	// This code is copy/paste from mouseDown: and should ideally be de-duplicated.