CocoaPictionary/MyViewController.m at master · compnski/CocoaPictionary · GitHub

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//
//  MyViewController.m
//  CocoaPictionary
//
//  Created by Jason on 10/16/09.
//  Copyright 2009 TokBox Inc.. All rights reserved.
//
#import <Carbon/Carbon.h>
#import "TabletApplication.h"
#import "MyViewController.h"

@implementation MyViewController

- (id)initWithFrame:(NSRect)pNsrectFrameRect {

	if ((self = [super initWithFrame:pNsrectFrameRect]) == nil) {
		return self;
	} // end if

	myMutaryOfBrushStrokes = [[NSMutableArray alloc]init];

	// initialise random numebr generator used in drawRect for creating colours etc.
	srand(time(NULL));

	return self;
} // end initWithFrame


-(void) awakeFromNib
{
	[[NSNotificationCenter defaultCenter] addObserver:self
											 selector:@selector(handleProximity:)
												 name:kProximityNotification
											   object:nil];
}
- (void)clear {
	[myMutaryOfBrushStrokes removeAllObjects];
	[myMutaryOfPoints removeAllObjects];
	[self setNeedsDisplay:YES];

}

-(void)mouseDown:(NSEvent *)pTheEvent {

	myMutaryOfPoints = [[NSMutableArray alloc]init];
	[myMutaryOfBrushStrokes addObject:myMutaryOfPoints];

	NSPoint tvarMousePointInWindow = [pTheEvent locationInWindow];
	NSPoint tvarMousePointInView   = [self convertPoint:tvarMousePointInWindow fromView:nil];
	MyPoint * tvarMyPointObj      = [[MyPoint alloc]initWithNSPoint:tvarMousePointInView];

	[myMutaryOfPoints addObject:tvarMyPointObj];

} // end mouseDown


-(void)mouseDragged:(NSEvent *)pTheEvent {

	BOOL eraser = false;
	NSPoint tvarMousePointInWindow = [pTheEvent locationInWindow];
	NSPoint tvarMousePointInView   = [self convertPoint:tvarMousePointInWindow fromView:nil];
	MyPoint * tvarMyPointObj      = [[MyPoint alloc]initWithNSPoint:tvarMousePointInView is_eraser:eraser];

	[myMutaryOfPoints addObject:tvarMyPointObj];

	[self setNeedsDisplay:YES];

} // end mouseDragged


-(void)mouseUp:(NSEvent *)pTheEvent {

	bool eraser=false;
	NSPoint tvarMousePointInWindow = [pTheEvent locationInWindow];
	NSPoint tvarMousePointInView   = [self convertPoint:tvarMousePointInWindow fromView:nil];
	MyPoint * tvarMyPointObj      = [[MyPoint alloc]initWithNSPoint:tvarMousePointInView is_eraser:eraser];


	[myMutaryOfPoints addObject:tvarMyPointObj];

	[self setNeedsDisplay:YES];

} // end mouseUp


- (float)randVar;
{
	return ( (float)(rand() % 10000 ) / 10000.0);
} // end randVar


- (void)drawRect:(NSRect)pNSRect {
	// colour the background white
	[[NSColor whiteColor] set];		// this is Cocoa
	NSRectFill( pNSRect );

	if ([myMutaryOfBrushStrokes count] == 0) {
		return;
	} // end if

	// This is Quartz
	NSGraphicsContext * tvarNSGraphicsContext = [NSGraphicsContext currentContext];
	CGContextRef      tvarCGContextRef     = (CGContextRef) [tvarNSGraphicsContext graphicsPort];

	NSUInteger tvarIntNumberOfStrokes = [myMutaryOfBrushStrokes count];

	NSUInteger i;
	for (i = 0; i < tvarIntNumberOfStrokes; i++) {

		CGContextSetRGBStrokeColor(tvarCGContextRef,0,0,0,255);
		CGContextSetLineWidth(tvarCGContextRef, (3.0) );

		myMutaryOfPoints = [myMutaryOfBrushStrokes objectAtIndex:i];

		NSUInteger tvarIntNumberOfPoints = [myMutaryOfPoints count];    // always >= 2
		MyPoint * tvarLastPointObj      = [myMutaryOfPoints objectAtIndex:0];
		CGContextBeginPath(tvarCGContextRef);
		CGContextMoveToPoint(tvarCGContextRef,[tvarLastPointObj x],[tvarLastPointObj y]);

		NSUInteger j;
		for (j = 1; j < tvarIntNumberOfPoints; j++) {  // note the index starts at 1
			MyPoint * tvarCurPointObj = [myMutaryOfPoints objectAtIndex:j];
			CGContextAddLineToPoint(tvarCGContextRef,[tvarCurPointObj x],[tvarCurPointObj y]);
		} // end for

		CGContextDrawPath(tvarCGContextRef,kCGPathStroke);

	} // end for

} // end drawRect


@end