dragfromwell.m

处理WORD文档的

//
// DragFromWell.m
//
// Andrew C. Stone and Stone Design Corp
//

#import "DRController.h"
#import "NSFileManager-Extensions.h"
#import "DragFromWell.h"

@implementation DragFromWell

// these two methods let us drag away without ordering the window front first:
- (BOOL)acceptsFirstMouse:(NSEvent *)theEvent {return YES;}
- (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent *)theEvent
{
        return YES; 	// see NSView.rtfd for full explanation
}

- (unsigned int)draggingSourceOperationMaskForLocal:(BOOL)flag
{
        if (flag) return NSDragOperationCopy;
        return NSDragOperationCopy|NSDragOperationGeneric|NSDragOperationLink;
}

- (BOOL)copyDataTo:pboard
{
        if (path != nil) {
                [pboard declareTypes:[NSArray arrayWithObject:NSFilenamesPboardType] owner:self];
                [pboard setPropertyList:[NSArray arrayWithObject:path] forType:NSFilenamesPboardType];
                return YES;
        } else return NO;

}


- (void)setFile:(NSString *)aPath
{
        [path autorelease];
        
        if (!aPath || [aPath isEqualToString:@""] || ![[NSFileManager defaultManager] fileExistsAtPath:aPath]) {
                path = nil;
                [self setImage:nil];
        } else {
                path = [aPath copy];
                [self setImage:[[NSWorkspace sharedWorkspace] iconForFile:path]];
        }
       [self display];
}


- (void)revealInFinder:(id)sender {
	BOOL isDir;
	if ([[NSFileManager defaultManager] fileExistsAtPath:path isDirectory:&isDir]) {
            if (isDir)
                [[NSWorkspace sharedWorkspace] selectFile:nil inFileViewerRootedAtPath:path];
            else
                [[NSWorkspace sharedWorkspace] selectFile:path inFileViewerRootedAtPath:nil];
	}
}

- (void)mouseDown:(NSEvent *)e
{
    if (NOT_NULL(path)) {
        NSPoint location;
        NSSize size;
        NSPasteboard *pb = [NSPasteboard pasteboardWithName:(NSString *) NSDragPboard];
         NSTimeInterval endTime, startTime = [e timestamp];
       if ([e clickCount] > 1) {
            [[NSWorkspace sharedWorkspace] openFile:path];
	    return;
        }
        if ([self copyDataTo:pb]) {
                size = [[self image] size];
                location.x = ([self bounds].size.width - size.width)/2;
                location.y = ([self bounds].size.height - size.height)/2;

                [self dragImage:[self image] at:location offset:NSZeroSize event:(NSEvent *)e pasteboard:pb source:self slideBack:YES];
        }
        // if they do drag, we won't do this:
        endTime = [[[self window] currentEvent] timestamp];
        if (endTime - startTime < .40)
            [self performSelector:@selector(revealInFinder:) withObject:nil afterDelay:0.5];
        } else [[NSApp delegate] showLogAction:self];
}

// override drag stuff...
- (void)awakeFromNib
{
    [self registerForDraggedTypes:[NSArray arrayWithObject:NSFilenamesPboardType]];
}

- (unsigned int) draggingEntered:sender
{
    return [[self window] draggingEntered:sender];
}

- (unsigned int) draggingUpdated:sender
{
    return [[self window] draggingUpdated:sender];
}

- (BOOL) prepareForDragOperation:sender
{
        return [[self window] prepareForDragOperation:sender];
}

- (BOOL) performDragOperation:(id <NSDraggingInfo>)sender
{
    return [[self window] performDragOperation:sender];
}
- (void)concludeDragOperation:(id <NSDraggingInfo>)sender {
    [[self window] concludeDragOperation:sender];
}


@end