[iOliverC]

Hey guys,

Im using a standard drag and drop procedure on my NSTextView. When I drop a file onto the TextView, their is a small blue border inside it (as normal) but there is no green + cursor like nearly every other app. Do I have to custom do this? I couldn't find anything on mamasam relating.

Thanks
Oliver

[sandsl]

Read through this page and make sure you are returning NSDragOperationGeneric from the draggingEntered; method.

This page on cocoadev might help if you haven't already read it.

If you can't figure it out, post the code your using.

[iOliverC]

Hey,

I had a look in my draggingEntered: method and it seems quite custom. I'm a bit confused as to what I should change/add, here is my dragging and dropping code in my TextView subclass:

Code:
- (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender
{
	if (![self dragIsFile:sender])
	{
		return [super draggingEntered:sender];
	}
	[self lockFocus];
	[[NSColor selectedControlColor] set];
	NSFrameRectWithWidth([self visibleRect], 2.5);
	[self unlockFocus];
	[[self window] flushWindow];
	return NSDragOperationGeneric;
}

- (NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)sender
{
	NSRect currentRect;
	if (![self dragIsFile:sender])
	{
		return [super draggingUpdated:sender];
	}
	currentRect = [self visibleRect];
	if (!NSEqualRects(currentRect, previousRect))
	{
		previousRect = currentRect;
		[self setNeedsDisplay:YES];
	}
	else
	{
		[self lockFocus];
		[[NSColor selectedControlColor] set];
		NSFrameRectWithWidth(currentRect, 2);
		[self unlockFocus];
		[[self window] flushWindow];
	}
	return NSDragOperationGeneric;
}

- (BOOL)prepareForDragOperation:(id <NSDraggingInfo>)sender
{
	if (![self dragIsFile:sender])
	{
		return [super prepareForDragOperation:sender];
	}
	return YES;
}

- (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
{
	NSString *filename;
	BOOL result;
	if (![self dragIsFile:sender])
	{
		return [super performDragOperation:sender];
	}
	filename = [self getFileForDrag:sender];
	result = [[self delegate] handleDroppedFile:filename forTextView:self];
	
	if (result == NO)
	{
		[self setNeedsDisplay:YES];
	}
	return result;
}

- (void)concludeDragOperation:(id <NSDraggingInfo>)sender
{
	if (![self dragIsFile:sender])
	{
		[super concludeDragOperation:sender];
		return;
	}
	[self setNeedsDisplay:YES];
	
}

- (void)draggingExited:(id <NSDraggingInfo>)sender
{
	if (![self dragIsFile:sender])
	{
		[super draggingExited:sender];
		return;
	}
	[self setNeedsDisplay:YES];
}

- (BOOL)dragIsFile:(id <NSDraggingInfo>)sender
{
	BOOL isDirectory;
	BOOL fileExists;
	NSString *dragFilename = [self getFileForDrag:sender];
	if (dragFilename == nil)
	{
		return NO;
	}
	fileExists = [[NSFileManager defaultManager] fileExistsAtPath:dragFilename isDirectory:&isDirectory];
	return (fileExists && (!isDirectory));
}

- (NSString *)getFileForDrag:(id <NSDraggingInfo>)sender
{
	NSPasteboard *pb = [sender draggingPasteboard];
	NSString *availableType = [pb availableTypeFromArray:[NSArray arrayWithObjects:NSFilenamesPboardType, NSPDFPboardType, nil]];
	NSString *availableTypeString = [pb availableTypeFromArray:[NSArray arrayWithObjects:NSStringPboardType, nil]];
	NSString *dragFilename;
	NSArray *props;
	if (availableType == nil)
	{
		return nil;
	}
	if (availableTypeString != nil)
	{
		return nil;
	}
	props = [pb propertyListForType:availableType];
	dragFilename = [props objectAtIndex:0];
	return dragFilename;
}

[arcticmac]

I'm no expert, but I just found this page last night:
http://www.cocoadevcentral.com/articles/000056.php