QuartzDemo/QuartzPolygons.m

/*
     File: QuartzPolygons.m
 Abstract: Demonstrates using Quartz to stroke & fill rectangles (QuartzRectView) and polygons (QuartzPolygonView).
  Version: 3.0
 
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*/
 
#import "QuartzPolygons.h"
 
@implementation QuartzRectView
 
-(void)drawInContext:(CGContextRef)context
{
    // Drawing with a white stroke color
    CGContextSetRGBStrokeColor(context, 1.0, 1.0, 1.0, 1.0);
    // And drawing with a blue fill color
    CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1.0);
    // Draw them with a 2.0 stroke width so they are a bit more visible.
    CGContextSetLineWidth(context, 2.0);
    
    // Add Rect to the current path, then stroke it
    CGContextAddRect(context, CGRectMake(30.0, 30.0, 60.0, 60.0));
    CGContextStrokePath(context);
    
    // Stroke Rect convenience that is equivalent to above
    CGContextStrokeRect(context, CGRectMake(30.0, 120.0, 60.0, 60.0));
    
    // Stroke rect convenience equivalent to the above, plus a call to CGContextSetLineWidth().
    CGContextStrokeRectWithWidth(context, CGRectMake(30.0, 210.0, 60.0, 60.0), 10.0);
    // Demonstate the stroke is on both sides of the path.
    CGContextSaveGState(context);
    CGContextSetRGBStrokeColor(context, 1.0, 0.0, 0.0, 1.0);
    CGContextStrokeRectWithWidth(context, CGRectMake(30.0, 210.0, 60.0, 60.0), 2.0);
    CGContextRestoreGState(context);
    
    CGRect rects[] = 
    {
        CGRectMake(120.0, 30.0, 60.0, 60.0),
        CGRectMake(120.0, 120.0, 60.0, 60.0),
        CGRectMake(120.0, 210.0, 60.0, 60.0),
    };
    // Bulk call to add rects to the current path.
    CGContextAddRects(context, rects, sizeof(rects)/sizeof(rects[0]));
    CGContextStrokePath(context);
    
    // Create filled rectangles via two different paths.
    // Add/Fill path
    CGContextAddRect(context, CGRectMake(210.0, 30.0, 60.0, 60.0));
    CGContextFillPath(context);
    // Fill convienience.
    CGContextFillRect(context, CGRectMake(210.0, 120.0, 60.0, 60.0));
}
 
@end
 
 
 
 
@implementation QuartzPolygonView
 
-(void)setDrawingMode:(CGPathDrawingMode)mode
{
    if (mode != _drawingMode)
    {
        _drawingMode = mode;
        [self setNeedsDisplay];
    }
}
 
-(void)drawInContext:(CGContextRef)context
{
    // Drawing with a white stroke color
    CGContextSetRGBStrokeColor(context, 1.0, 1.0, 1.0, 1.0);
    // Drawing with a blue fill color
    CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1.0);
    // Draw them with a 2.0 stroke width so they are a bit more visible.
    CGContextSetLineWidth(context, 2.0);
 
    CGPoint center;
 
    // Add a star to the current path
    center = CGPointMake(90.0, 90.0);
    CGContextMoveToPoint(context, center.x, center.y + 60.0);
    for(int i = 1; i < 5; ++i)
    {
        CGFloat x = 60.0 * sinf(i * 4.0 * M_PI / 5.0);
        CGFloat y = 60.0 * cosf(i * 4.0 * M_PI / 5.0);
        CGContextAddLineToPoint(context, center.x + x, center.y + y);
    }
    // And close the subpath.
    CGContextClosePath(context);
 
    // Now add the hexagon to the current path
    center = CGPointMake(210.0, 90.0);
    CGContextMoveToPoint(context, center.x, center.y + 60.0);
    for(int i = 1; i < 6; ++i)
    {
        CGFloat x = 60.0 * sinf(i * 2.0 * M_PI / 6.0);
        CGFloat y = 60.0 * cosf(i * 2.0 * M_PI / 6.0);
        CGContextAddLineToPoint(context, center.x + x, center.y + y);
    }
    // And close the subpath.
    CGContextClosePath(context);
    
    // Now draw the star & hexagon with the current drawing mode.
    CGContextDrawPath(context, self.drawingMode);
}
 
@end