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//
// NodeLayer.m
// TikZiT
//
// Copyright 2010 Aleks Kissinger. All rights reserved.
//
//
// This file is part of TikZiT.
//
// TikZiT is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// TikZiT is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with TikZiT. If not, see <http://www.gnu.org/licenses/>.
//
#import "NodeLayer.h"
#import "CALayer+DrawLabel.h"
#import "NSString+LatexConstants.h"
#import "Shape.h"
#import "ShapeNames.h"
#import "Node.h"
#import "Edge.h"
@implementation NodeLayer
@synthesize node, selection, rescale;
- (id)initWithNode:(Node *)n transformer:(Transformer*)t {
[super init];
node = n;
selection = [[NodeSelectionLayer alloc] init];
[selection setNodeLayer:self];
localTrans = [[Transformer alloc] init];
[self addSublayer:selection];
textwidth = 0.0f;
center = NSMakePoint(0.0f, 0.0f);
transformer = t;
path = NULL;
rescale = YES;
dirty = YES;
[self updateFrame];
return self;
}
- (NSColor*)strokeColor {
if ([node style] != nil) {
return [[[node style] strokeColor] colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
} else {
return nil;
}
}
- (NSColor*)fillColor {
if ([node style] != nil) {
return [[[node style] fillColor] colorUsingColorSpace:[NSColorSpace deviceRGBColorSpace]];
} else {
return nil;
}
}
- (float)strokeWidth {
if ([node style] != nil) {
return [node.style strokeThickness];
} else {
return [NodeStyle defaultStrokeThickness];
}
}
- (NSPoint)center { return center; }
- (void)setCenter:(NSPoint)ctr {
center.x = round(ctr.x);
center.y = round(ctr.y);
[self updateFrame];
}
- (void)setCenter:(NSPoint)ctr andAnimateWhen:(BOOL)anim {
[CATransaction begin];
if (!anim) {
[CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions];
}
[self setCenter:ctr];
[CATransaction commit];
}
- (void)updateShape {
Shape *s = ([node style] != nil) ?
[Shape shapeForName:[[node style] shapeName]] :
[Shape shapeForName:SHAPE_CIRCLE];
if (s != shape) { // straight pointer comparison
shape = s;
dirty = YES;
}
}
- (void)updateLocalTrans {
float scale = ([node style] != nil) ? [[node style] scale] : 1.0f;
Transformer *t = [Transformer transformer];
float rad = ([transformer scaleToScreen:scale] / 2.0f) + 8.0f;
[t setOrigin:NSMakePoint(rad, rad)];
[t setScale:[transformer scale]*((rescale)?scale:0.8f)];
if (![localTrans isEqual:t]) {
dirty = YES;
localTrans = t;
}
}
- (void)updateFrame {
[self updateLocalTrans];
[self updateShape];
float rad = [localTrans origin].x;
[self setFrame:CGRectIntegral(CGRectMake(center.x - rad, center.y - rad, 2*rad, 2*rad))];
NSRect bds = NSMakeRect(0, 0, 2*rad, 2*rad);
[selection setFrame:NSRectToCGRect(bds)];
[self setNeedsDisplay];
[selection setNeedsDisplay];
}
- (CGMutablePathRef)path {
if (dirty) {
CGMutablePathRef pth = CGPathCreateMutable();
NSPoint p, cp1, cp2;
for (NSArray *arr in [shape paths]) {
BOOL fst = YES;
for (Edge *e in arr) {
if (fst) {
fst = NO;
p = [localTrans toScreen:[[e source] point]];
CGPathMoveToPoint(pth, nil, p.x, p.y);
}
p = [localTrans toScreen:[[e target] point]];
if ([e isStraight]) {
CGPathAddLineToPoint(pth, nil, p.x, p.y);
} else {
cp1 = [localTrans toScreen:[e cp1]];
cp2 = [localTrans toScreen:[e cp2]];
CGPathAddCurveToPoint(pth, nil, cp1.x, cp1.y, cp2.x, cp2.y, p.x, p.y);
}
}
CGPathCloseSubpath(pth);
}
if (path != NULL) CFRelease(path);
path = pth;
dirty = NO;
}
return path;
}
- (BOOL)nodeContainsPoint:(NSPoint)p {
CGPoint p1 = CGPointMake(p.x - [self frame].origin.x, p.y - [self frame].origin.y);
return CGPathContainsPoint([self path],nil,p1,NO);
}
- (void)drawInContext:(CGContextRef)context {
CGContextSaveGState(context);
if ([node style] == nil) {
CGContextSetRGBStrokeColor(context, 0.4f, 0.4f, 0.7f, 1.0f);
CGContextSetRGBFillColor(context, 0.4f, 0.4f, 0.7f, 1.0f);
//CGRect fr = [self frame];
CGRect bds = NSRectToCGRect([localTrans rectToScreen:NSMakeRect(-0.5, -0.5, 1, 1)]);
CGRect pt = CGRectMake(CGRectGetMidX(bds)-1.0f, CGRectGetMidY(bds)-1.0f, 2.0f, 2.0f);
CGContextSetLineWidth(context, 0);
CGContextAddEllipseInRect(context, pt);
CGContextFillPath(context);
// HACK: for some reason, CGFloat isn't getting typedef'ed properly
#ifdef __x86_64__
const double dash[2] = {2.0,2.0};
#else
const float dash[2] = {2.0,2.0};
#endif
CGContextSetLineDash(context, 0.0, dash, 2);
CGContextSetLineWidth(context, 1);
CGContextAddPath(context, [self path]);
CGContextStrokePath(context);
} else {
NSColor *stroke = [self strokeColor];
NSColor *fill = [self fillColor];
CGContextSetRGBStrokeColor(context,
[stroke redComponent],
[stroke greenComponent],
[stroke blueComponent],
[stroke alphaComponent]);
CGContextSetLineWidth(context, [self strokeWidth]);
CGContextSetRGBFillColor(context,
[fill redComponent],
[fill greenComponent],
[fill blueComponent],
[fill alphaComponent]);
CGContextSetLineWidth(context, [self strokeWidth]);
CGContextAddPath(context, [self path]);
CGContextDrawPath(context, kCGPathFillStroke);
}
if (!([node label] == nil || [[node label] isEqual:@""])) {
NSPoint labelPt = NSMakePoint([self frame].size.width/2, [self frame].size.height/2);
[self drawLabel:[[node label] stringByExpandingLatexConstants]
atPoint:labelPt
inContext:context
usingTrans:transformer];
}
CGContextRestoreGState(context);
}
- (void)dealloc {
if (path != NULL) CFRelease(path);
[super dealloc];
}
@end
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