Feature to drag a file from Windows to Mac:

- On Mac client main thread is used for cocoa application in order to simulate drag.
- Send dragging file dir from Windows server to Mac client while dragging after switching screen.
- Dragging information sending is immature now (need to support multi files dragging in the future).
- Used Cocoa function to monitor dragg pasteboard.
- Changed Mac client to use another thread for event queue instead of the main thread.
- Change fileRecieveComplete to fileRecieveCompleted.

src/lib/platform/COSXDragView.m

@@ -0,0 +1,90 @@
+/*
+ * synergy -- mouse and keyboard sharing utility
+ * Copyright (C) 2013 Bolton Software Ltd.
+ *
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file COPYING that should have accompanied this file.
+ *
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#import "COSXDragView.h"
+
+@implementation COSXDragView
+
+- (id)
+initWithFrame:(NSRect)frame
+{
+	self = [super initWithFrame:frame];
+	m_dropTarget = [[NSMutableString alloc] initWithCapacity:0];
+    return self;
+}
+
+- (void)
+drawRect:(NSRect)dirtyRect
+{
+}
+
+- (BOOL)
+acceptsFirstMouse:(NSEvent *)theEvent
+{
+	return YES;
+}
+
+- (void)
+mouseDown:(NSEvent *)theEvent
+{
+	NSPoint dragPosition;
+	NSRect imageLocation;
+	dragPosition = [self convertPoint:[theEvent locationInWindow]
+							 fromView:nil];
+	
+	dragPosition.x -= 16;
+	dragPosition.y -= 16;
+	imageLocation.origin = dragPosition;
+	imageLocation.size = NSMakeSize(32,32);
+	[self dragPromisedFilesOfTypes:[NSArray arrayWithObject:@"zip"]
+								fromRect:imageLocation
+								  source:self
+							   slideBack:NO
+								   event:theEvent];
+}
+
+- (NSArray*)
+namesOfPromisedFilesDroppedAtDestination:(NSURL *)dropDestination
+{
+	[m_dropTarget setString:@""];
+	[m_dropTarget appendString:dropDestination.path];
+	NSLog ( @"cocoa drop target: %@", m_dropTarget);
+	return nil;
+}
+
+-(NSDragOperation)
+draggingSourceOperationMaskForLocal:(BOOL)flag
+{
+	return NSDragOperationCopy;
+}
+
+-(CFStringRef)
+getDropTarget
+{
+	NSMutableString* string;
+	string = [[NSMutableString alloc] initWithCapacity:0];
+	[string appendString:m_dropTarget];
+	return (CFStringRef)string;
+}
+
+-(void)
+clearDropTarget
+{
+	[m_dropTarget setString:@""];
+}
+
+@end