//

//  CroppingImageView.m

//  Cropped Image

//

//  Created by jcr on Tue Jul 16 2002.

//  Copyright (c) 2002 Apple Computer, Inc.  All rights reserved.

//

#import "CroppingImageView.h"

#import "CropMarker.h"

#import "FinderStyleCropMarker.h"

#import "IPhotoStyleCropMarker.h"

#import "LassoStyleCropMarker.h"

enum 

  {

  plainMarkerStyle,   // Simple rectangle

  finderMarkerStyle,  // Rectangle bordered with a solid color, and its interior is tinted.

  iPhotoMarkerStyle,  // Area outside the rectangle is tinted.

  lassoMarkerStyle    // Path is stroked, and filled with a tint.

  }; 

NSString *selectionChangedNotification = @"ImageSelectionChanged";

@implementation NSImageCell (CroppingImageView)

- (NSRect) rectCoveredByImageInBounds:(NSRect) bounds

    // This is a work-around to deal with the fact that NSImageCell won't tell me the rectangle *actually* covered by its image, but NSCell will.

  {

  return [super imageRectForBounds:bounds];

  }

@end

@implementation CroppingImageView

- (IBAction) takeSelectionMarkerStyleFrom:sender

// I should probably check to see if this call is a No-Op.  As it is, whenever this is called, I discard the existing CropMarker, and create a new one.

    {

    NSRect stash = [selectionMarker selectedRect];  // If we change styles, it's nice to keep the same area selected.

    switch ([[sender selectedCell] tag])

        {

      case plainMarkerStyle:

          [self setSelectionMarker:[CropMarker cropMarkerForView:self]]; 

            [selectionMarker setSelectedRect:stash];

            break;

        case finderMarkerStyle:

          [self setSelectionMarker:[FinderStyleCropMarker cropMarkerForView:self]]; 

            [selectionMarker setSelectedRect:stash];

            break;

        case iPhotoMarkerStyle:

          [self setSelectionMarker:[IPhotoStyleCropMarker cropMarkerForView:self]]; 

            [selectionMarker setSelectedRect:stash];

            break;

        case lassoMarkerStyle:

          [self setSelectionMarker:[LassoStyleCropMarker cropMarkerForView:self]]; 

            break;

        }

    [self setNeedsDisplay:YES];

    }

- (void)drawRect:(NSRect)rect 

  {

  [super drawRect:rect];

    [selectionMarker drawCropMarker];

  }

    // NSResponder methods.  For the most part, the events are just punted to the CropMarker.

- (void) mouseDown:(NSEvent *) theEvent { [selectionMarker mouseDown:theEvent]; }

- (void) mouseUp:(NSEvent *) theEvent 

    { 

    [selectionMarker mouseUp:theEvent]; 

    [self selectionChanged];

    [self postSelectionChangedNotification];  // This is how the controller knows to redraw the second NSImageView.

    }

- (void) mouseDragged:(NSEvent *) theEvent 

    { 

    [selectionMarker mouseDragged:theEvent]; 

    if ([self isContinuous])

        [self postSelectionChangedNotification];

    [self selectionChanged];    

    }

- (void) selectionChanged   { [self setNeedsDisplay:YES]; }

- (void) postSelectionChangedNotification

    {

    [[NSNotificationCenter defaultCenter] postNotificationName:selectionChangedNotification object:self];

    }

- (NSImage *) croppedImage 

 // Returns an autoreleased NSImage, consisting of the selected portion of the reciever's image.  

 // If there's no selection, this method will return the original image.

    {

    NSRect 

      sourceImageRect = [[self cell] rectCoveredByImageInBounds:[self bounds]], 

        newImageBounds = NSIntersectionRect([selectionMarker selectedRect], sourceImageRect);

    if (!NSIsEmptyRect(newImageBounds))

        {

        NSImage 

            *newImage = [[NSImage alloc] initWithSize:sourceImageRect.size];

        NSAffineTransform 

            *pathAdjustment = [NSAffineTransform transform];

        NSBezierPath 

            *croppingPath = [selectionMarker selectedPath]; 

        [pathAdjustment translateXBy: -NSMinX(sourceImageRect) yBy: -NSMinY(sourceImageRect)];

        croppingPath = [pathAdjustment transformBezierPath:[selectionMarker selectedPath]];

        [newImage lockFocus];

        if (!shouldAntiAlias) 

            [[NSGraphicsContext currentContext] setShouldAntialias:NO];

        [[NSColor blackColor] set];

        [croppingPath fill];

        [[self image] compositeToPoint:NSZeroPoint operation:NSCompositeSourceIn];

        [newImage unlockFocus];

        return [newImage autorelease];

        }       

    return [self image];

    }

    // Accessors..

- (void) setSelectionMarker: marker  // Should be a CropMarker or a subclass thereof, but I'm not in the mood for strong typing..

    {

    [marker retain];

    [selectionMarker release];

    selectionMarker = marker;

    }

- (IBAction) takeSelectionColorFrom:sender

    {

    [selectionMarker setColor:[sender color]];

    [self setNeedsDisplay:YES];

    }

- (IBAction) takeAntiAliasModeFrom:sender

 { 

 shouldAntiAlias = [sender intValue]; 

 [self postSelectionChangedNotification];

 }

- (IBAction) takeContinuousModeFrom:sender { [self setContinuous:[sender intValue]]; }

@end

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