drag rect

#import "EvfCropView.h"

@implementation EvfCropView

- (id)initWithFrame:(NSRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code here.
    }
	downPoint_ = NSZeroPoint;
	lastRect_.size.width = 0;
	lastRect_.size.height = 0;
	lastRect_.origin.x = 0;
	lastRect_.origin.y = 0;
	return self;
}

- (void)drawRect:(NSRect)dirtyRect {
	[super drawRect:dirtyRect];
	NSRect CropImageRect = {0};
	if (CropImageRect.origin.x == 0) {
		CropImageRect.origin.x = dirtyRect.size.width / 5 * 2;
		CropImageRect.origin.y = dirtyRect.size.width / 5; 
		CropImageRect.size.width = dirtyRect.size.width / 5;
		CropImageRect.size.height = dirtyRect.size.height / 5;
		if (lastRect_.size.width != 0) {
			CropImageRect.size.width = lastRect_.size.width;
			CropImageRect.size.height = lastRect_.size.height; 
			CropImageRect.origin.x = lastRect_.origin.x;
			CropImageRect.origin.y = lastRect_.origin.y;
		}
	}
	
	if (currentPoint_.x == 0) {
		lastRect_.size.width = CropImageRect.size.width;
		lastRect_.size.height = CropImageRect.size.height;
		lastRect_.origin.x = CropImageRect.origin.x;
		lastRect_.origin.y = CropImageRect.origin.y;
		}
	// Point In Rect
	else if (NSPointInRect(downPoint_, CropImageRect) == YES) {
		CropImageRect.size.width = lastRect_.size.width;
		CropImageRect.size.height = lastRect_.size.height; 
		CropImageRect.origin.x = lastRect_.origin.x + (currentPoint_.x - downPoint_.x);
		CropImageRect.origin.y = lastRect_.origin.y + (currentPoint_.y - downPoint_.y);
		if (mouseDownUp_ == 1) {
			lastRect_.origin.x = CropImageRect.origin.x;
			lastRect_.origin.y = CropImageRect.origin.y;
			lastRect_.size.width = CropImageRect.size.width;
			lastRect_.size.height = CropImageRect.size.height;
		}
	}
	// Point Not In Rect
	else if (NSPointInRect(downPoint_, CropImageRect) == NO) {
		CropImageRect.size.width = lastRect_.size.width;
		CropImageRect.size.height = lastRect_.size.height; 
		CropImageRect.origin.x = lastRect_.origin.x;
		CropImageRect.origin.y = lastRect_.origin.y;
		
		// Adjust Crop
		for (knobCount = 1; knobCount < 9;knobCount++){
			knobHandle_ = [[[KnobPointHandle alloc] init] autorelease];
			knobRect = [knobHandle_ knobGetOrigin:CropImageRect knobNum:knobCount];
			CropImageRect = [knobHandle_ adjustedCrop:CropImageRect oldRect:lastRect_ downPoint:downPoint_ movePoint:currentPoint_];
			
			if (mouseDownUp_ == 1) 
				lastRect_ = CropImageRect;
		}	
	}
	
	// Draw CropRect
	[NSBezierPath setDefaultLineWidth:3];
	[[NSColor colorWithCalibratedRed:0.0/255.0 green:0.0/255.0 blue: 0.0/255.0 alpha:0.5] setFill];
	[NSBezierPath fillRect:CropImageRect];
	[[NSColor colorWithCalibratedRed:0.0/255.0 green:0.0/255.0 blue: 0.0/255.0 alpha:1.0] set];
	[NSBezierPath strokeRect:CropImageRect];
	[[NSGraphicsContext currentContext] setCompositingOperation: NSCompositeSourceOver];
}

- (void)mouseDown:(NSEvent *)theEvent
{
	mouseDownUp_ = 0;
	NSPoint mousePoint = [theEvent locationInWindow];
	downPoint_ = [self convertPoint:mousePoint fromView:nil];
	currentPoint_ = downPoint_;
	[self setNeedsDisplay:YES];
}

- (void)mouseDragged:(NSEvent *)theEvent
{
	NSPoint mousePoint = [theEvent locationInWindow];
	currentPoint_ = [self convertPoint:mousePoint fromView:nil];
	[self setNeedsDisplay:YES];
}

- (void)mouseUp:(NSEvent *)theEvent
{
	mouseDownUp_ = 1;
	NSPoint mousePoint = [theEvent locationInWindow];
	currentPoint_ = [self convertPoint:mousePoint fromView:nil];
	[self setNeedsDisplay:YES];
}

@end