SKTGraphic.h

// SKTGraphic.h
// Sketch Example
//

#import <AppKit/AppKit.h>

@class SKTGraphicView;
@class SKTDrawDocument;

enum {
    NoKnob = 0,
    UpperLeftKnob,
    UpperMiddleKnob,
    UpperRightKnob,
    MiddleLeftKnob,
    MiddleRightKnob,
    LowerLeftKnob,
    LowerMiddleKnob,
    LowerRightKnob,
};

enum {
    NoKnobsMask = 0,
    UpperLeftKnobMask = 1 << UpperLeftKnob,
    UpperMiddleKnobMask = 1 << UpperMiddleKnob,
    UpperRightKnobMask = 1 << UpperRightKnob,
    MiddleLeftKnobMask = 1 << MiddleLeftKnob,
    MiddleRightKnobMask = 1 << MiddleRightKnob,
    LowerLeftKnobMask = 1 << LowerLeftKnob,
    LowerMiddleKnobMask = 1 << LowerMiddleKnob,
    LowerRightKnobMask = 1 << LowerRightKnob,
    AllKnobsMask = 0xffffffff,
};

extern NSString *SKTGraphicDidChangeNotification;

@interface SKTGraphic : NSObject <NSCopying> {
    @private
    SKTDrawDocument *_document;
    NSRect _bounds;
    NSRect _origBounds;
    float _lineWidth;
    NSColor *_fillColor;
    NSColor *_strokeColor;
    struct __gFlags {
        unsigned int drawsFill:1;
        unsigned int drawsStroke:1;
        unsigned int manipulatingBounds:1;
        unsigned int _pad:29;
    } _gFlags;
}

- (id)init;

// ========================= Document accessors and conveniences =========================
- (void)setDocument:(SKTDrawDocument *)document;
- (SKTDrawDocument *)document;
- (NSUndoManager *)undoManager;

// =================================== Primitives ===================================
- (void)didChange;
    // This sends the did change notification.  All change primitives should call it.

- (void)setBounds:(NSRect)bounds;
- (NSRect)bounds;
- (void)setDrawsFill:(BOOL)flag;
- (BOOL)drawsFill;
- (void)setFillColor:(NSColor *)fillColor;
- (NSColor *)fillColor;
- (void)setDrawsStroke:(BOOL)flag;
- (BOOL)drawsStroke;
- (void)setStrokeColor:(NSColor *)strokeColor;
- (NSColor *)strokeColor;
- (void)setStrokeLineWidth:(float)width;
- (float)strokeLineWidth;

// =================================== Extended mutation ===================================
- (void)startBoundsManipulation;
- (void)stopBoundsManipulation;
- (void)moveBy:(NSPoint)vector;
- (void)flipHorizontally;
- (void)flipVertically;
- (int)resizeByMovingKnob:(int)knob toPoint:(NSPoint)point;
- (void)makeNaturalSize;

// =================================== Subclass capabilities ===================================
- (BOOL)canDrawStroke;
- (BOOL)canDrawFill;
- (BOOL)hasNaturalSize;

// =================================== Persistence ===================================
- (NSMutableDictionary *)propertyListRepresentation;
+ (id)graphicWithPropertyListRepresentation:(NSDictionary *)dict;
- (void)loadPropertyListRepresentation:(NSDictionary *)dict;

@end

@interface SKTGraphic (SKTDrawing)

- (NSRect)drawingBounds;
- (NSBezierPath *)bezierPath;
- (void)drawInView:(SKTGraphicView *)view isSelected:(BOOL)flag;
- (unsigned)knobMask;
- (int)knobUnderPoint:(NSPoint)point;
- (void)drawHandleAtPoint:(NSPoint)point inView:(SKTGraphicView *)view;
- (void)drawHandlesInView:(SKTGraphicView *)view;

@end

@interface SKTGraphic (SKTEventHandling)

+ (NSCursor *)creationCursor;

- (BOOL)createWithEvent:(NSEvent *)theEvent inView:(SKTGraphicView *)view;

- (BOOL)isEditable;
- (void)startEditingWithEvent:(NSEvent *)event inView:(SKTGraphicView *)view;
- (void)endEditingInView:(SKTGraphicView *)view;

- (BOOL)hitTest:(NSPoint)point isSelected:(BOOL)isSelected;

@end

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