Create a branch for header work.

svn path=/branches/header-work/; revision=45691

lib/3rdparty/cardlib/dropzone.h

@@ -0,0 +1,39 @@
+#ifndef DROPZONE_INCLUDED
+#define DROPZONE_INCLUDED
+
+//
+//	define a drop-zone, which can be used to over-ride
+//	drop-behaviour for any card stacks which fall under it
+//
+
+class CardStack;
+
+class DropZone
+{
+	friend class CardWindow;
+
+	DropZone(int Id, RECT *rect, pDropZoneProc proc) :
+	  id(Id), DropZoneCallback(proc) { CopyRect(&zone, rect); }
+
+public:
+
+	void SetZone(RECT *rect) { CopyRect(&zone, rect); }
+	void GetZone(RECT *rect) { CopyRect(rect, &zone); }
+	void SetCallback(pDropZoneProc callback) { DropZoneCallback = callback; }
+
+	int  DropCards(CardStack &cardstack)
+	{
+		if(DropZoneCallback)
+			return DropZoneCallback(id, cardstack);
+		else
+			return -1;
+	}
+
+private:
+
+	int  id;
+	RECT zone;
+	pDropZoneProc DropZoneCallback;
+};
+
+#endif