//

//  CropMarker.m

//  Cropped Image

//

//  Created by jcr on Tue Jul 16 2002.

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

//

#import "CropMarker.h"

#import "NSBezierPathExtensions.h"

#define WHERE [target convertPoint:[theEvent locationInWindow] fromView:nil]

@implementation CropMarker

+ cropMarkerForView:aView { return [[[self alloc] initWithView:aView] autorelease]; }

- initWithView:(NSView *) aView

  {

  if (self = [super init])

        {

        target = aView;

        [self setColor:[NSColor blueColor]];

        selectedPath = [[NSBezierPath bezierPath] retain];

        [self setSelectedRect:NSZeroRect];

        }

  return self;

  }

- (void) setColor:(NSColor *) aColor

    {

    [self setStrokeColor:aColor];

    [self setFillColor:[strokeColor colorWithAlphaComponent:0.2]];  //This really shouldn't be hard-coded...

    }

- (void) drawCropMarker { [strokeColor set]; NSFrameRect(selectedRect); }

- (void) startMovingAtPoint:(NSPoint) where { trackingMode = trackMoving; lastLocation = where; }

- (void) startSelectingAtPoint:(NSPoint) where  { trackingMode = trackSelecting; lastLocation = where;  }

- (void) continueMovingAtPoint:(NSPoint) where

    {

    selectedRect.origin.x += where.x - lastLocation.x;

    selectedRect.origin.y += where.y - lastLocation.y;

    lastLocation = where;

    }

- (void) stopMovingAtPoint:(NSPoint) where

    {

    [self continueMovingAtPoint:where];

    trackingMode = trackNone;

    }

- (void) continueSelectingAtPoint:(NSPoint) where { selectedRect = rectFromPoints(lastLocation,where); }

- (void) stopSelectingAtPoint:(NSPoint) where 

    { 

    selectedRect = rectFromPoints(lastLocation,where);  

    trackingMode = trackNone;

    }

    // CropMarker isn't an NSResponder subclass, but it still cares about mouse events.

- (void) mouseDown:(NSEvent *) theEvent 

    { 

    lastLocation = WHERE;

    if (NSPointInRect(lastLocation, selectedRect))

            {

            [self startMovingAtPoint:lastLocation]; 

            return;

            }

    [self startSelectingAtPoint:lastLocation];

    }

- (void) mouseUp:(NSEvent *) theEvent 

    { 

    switch (trackingMode)

        {

        case trackSelecting:

            [self stopSelectingAtPoint:WHERE];

            break;

        case trackMoving:

            [self stopMovingAtPoint:WHERE];

            break;

        default:    

            NSLog (@"Bad tracking mode in [CropMarker mouseUp]");

        }

    }

- (void) mouseDragged:(NSEvent *) theEvent 

    { 

    switch (trackingMode)

        {

        case trackSelecting:

            [self continueSelectingAtPoint:WHERE];

            break;

        case trackMoving:

            [self continueMovingAtPoint:WHERE];

            break;

        default:    

            NSLog (@"Bad tracking mode in [CropMarker mouseDragged]");

        }

    }

- (void) dealloc

  {

  if (fillColor) [fillColor release];

  if (strokeColor) [strokeColor release];

  [super dealloc];

  }

    // Accessors and other one-liners.

- (void) setFillColor:(NSColor *) color { [color retain]; [fillColor release]; fillColor = color; }

- (void) setStrokeColor:(NSColor *) color { [color retain]; [strokeColor release]; strokeColor = color; }

- (NSBezierPath *) selectedPath {  return [NSBezierPath bezierPathWithRect:selectedRect];}

- (NSRect) selectedRect     { return selectedRect; }

- (void) setSelectedRect:(NSRect) rect { selectedRect = rect;}

- (void) setSelectedRectOrigin:(NSPoint) where { selectedRect.origin = where;}

- (void) setSelectedRectSize:(NSSize) size { selectedRect.size = size;}

- (void) moveSelectedRectBy:(NSSize) delta { selectedRect.origin.x += delta.width; selectedRect.origin.y += delta.height;}

@end

NSRect rectFromPoints(NSPoint p1, NSPoint p2)  // Given two corners, make an NSRect.

  {

  return 

    NSMakeRect( MIN(p1.x, p2.x), 

                MIN(p1.y, p2.y), 

                fabs(p1.x - p2.x), 

                fabs(p1.y - p2.y));

  }

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