ftp.nice.ch/Attic/openStep/text/tex/Tex2Eps.wm.s.tgz#/Tex2Eps/DragView.m

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#import "DragView.h"
#import "Controller.h"
#import <AppKit/AppKit.h>


@implementation DragView

- (void) awakeFromNib
{
    epsIcon = [[NSImage imageNamed:@"docEps.tiff"] retain];

    // The drag area (NSImageView) should not act as drop area.
    // it accepts as drop area of all image types by default

    [self unregisterDraggedTypes];
}


// won't be the top Window if something is dragged

- (BOOL)acceptsFirstMouse:(NSEvent *)theEvent  { return YES; }
- (BOOL)shouldDelayWindowOrderingForEvent:(NSEvent *)theEvent  { return YES; }



// The mouseDown is the simplest possible implementation. 
// The drag operation is invoked immediately,
// if the application includes drop-sites itself or the image
// should appear after a little mouse movement, the implementation
// is a little bit more complicated
// Thanks to Prof. Heinrich Giesen, Uni Koblenz, Germany

- (void)mouseDown:(NSEvent *)theEvent
{
    NSSize dragOffset = NSMakeSize(0.0, 0.0);
    NSPasteboard *pboard;
    NSPoint	origin = [self convertPoint:[theEvent locationInWindow] fromView:nil];

    origin.x -= 10.0;
    origin.y -= 10.0;

    pboard = [NSPasteboard pasteboardWithName:NSDragPboard];
    [pboard declareTypes:[NSArray arrayWithObject:NSFilenamesPboardType] owner:self];
    [pboard setPropertyList:[NSArray arrayWithObject:[[NSApp delegate] tellMeTheEpsFile]]
                    forType:NSFilenamesPboardType];

    [self dragImage:epsIcon
                 at:origin
             offset:dragOffset
           event:theEvent
         pasteboard:pboard
             source:self
          slideBack:YES];

    [[NSApp delegate] focusToTex];

    return;
}


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



@end

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