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/**************************************************************************
* CLASS: MiscImageDragView
* Copyright (C) 1995 Robert Todd Thomas
* Use is governed by the MiscKit license
*
* See the header file for more information on this class.
**************************************************************************/
#import <appkit/Pasteboard.h>
#import "MiscImageDragView.h"
#define MISC_IMAGEDRAGVIEW_VERSION 1
@implementation MiscImageDragView
+ initialize
{
// Set the versioning for archiving.
if (self == [MiscImageDragView class])
[self setVersion: MISC_IMAGEDRAGVIEW_VERSION];
return self;
}
// Register to accept dragging, and setup some defaults.
- initFrame: (NXRect *)frameRect
{
[super initFrame: frameRect];
[self setDragIconRepresentation: YES];
return self;
}
- initDragTypes
{
const char *const types[] = { NXPostScriptPboardType, NXTIFFPboardType,
NXFilenamePboardType };
[self registerForDraggedTypes: (const char *const *)&types count: 3];
return self;
}
// Sets whether the TIFF itself or its TIFF icon representation is dragged.
- setDragIconRepresentation: (BOOL)aBool
{
dragIconRepresentation = aBool;
return self;
}
- (BOOL)dragIconRepresentation
{
return dragIconRepresentation;
}
// Put the image data on the NXTIFFPboardType. Also set the image that is
// going to be used for the drag, depending upon whether
// dragIconRepresentation is true.
- (BOOL)setupForSourceDrag
{
id dragPB = [self draggingPasteboard];
NXStream *imageStream = NXOpenMemory (NULL, 0, NX_WRITEONLY);
const char *const types[] = { NXTIFFPboardType };
// write the NXImage in TIFF form (it's original size)
[dragPB declareTypes: types num: 1 owner: self];
// put the image back to regular size and write it
[ [self image] setSize: &imageSize];
[ [self image] writeTIFF: imageStream];
[dragPB writeType: NXTIFFPboardType fromStream: imageStream];
NXCloseMemory (imageStream, NX_FREEBUFFER);
// if use icon rep. grab the image from somewhere that everyone has
if ([self dragIconRepresentation])
[self setDragImage: [ [NXImage alloc] initFromFile:
"/NextApps/Preview.app/tiff.tiff"] freeWhenDone: YES];
else
[self setDragImage: [self image] ];
return YES;
}
// Adjust the dragPoint so that you grab the image in the center.
- calculateDragPoint: (NXPoint *)dragPoint andOffset: (NXPoint *)offset
{
if ([self dragIconRepresentation])
{
dragPoint->x -= 24.0;
dragPoint->y -= 24.0;
}
else
{
NXSize imSize;
[ [self image] getSize: &imSize];
dragPoint->x -= imSize.width / 2.0;
dragPoint->y -= imSize.height / 2.0;
}
return self;
}
// This sure is a complicated method. Actually NXImage takes care
// of everything. It checks for filenames, correct extensions, data
// on the correct pasteboards, and even accepts non native images if
// you have the filters.
- (BOOL)prepareForDragOperation: sender
{
if ([NXImage canInitFromPasteboard: [sender draggingPasteboard] ])
return YES;
[self cleanupAfterDestinationDrag];
[self display];
return NO;
}
// Take the pasteboard data and create the image.
- (BOOL)performDragOperation: sender
{
[self setImage: [ [NXImage alloc] initFromPasteboard:
[sender draggingPasteboard] ] ];
return YES;
}
// Archiving methods
- read: (NXTypedStream *)stream
{
int version;
[super read: stream];
version = NXTypedStreamClassVersion(stream, "MiscImageDragView");
switch (version)
{
case 0:
break;
case MISC_IMAGEDRAGVIEW_VERSION:
NXReadType (stream, "c", &dragIconRepresentation);
break;
}
return self;
}
- write: (NXTypedStream *)stream
{
[super write: stream];
NXWriteType (stream, "c", &dragIconRepresentation);
return self;
}
- (const char *)stringValue
{ // we don't currently remember the filename, so we don't
// know where the image came from...
return [super stringValue];
}
- setStringValue:(const char *)aValue
{
return [self setImageByFilename:aValue];
}
@end
/*****************************************************************************
CHANGES:
Version 0.4, November 30, 1994 (Todd)
1) Just made it compatible with the changes made in MiscDragView and
added archive versioning.
*****************************************************************************/
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.