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/*
* Copyright 2011 Alex Merry <dev@randomguy3.me.uk>
* Copyright 2010 Chris Heunen
*
* This program 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 2 of
* the License, or (at your option) any later version.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import "Node+Render.h"
#import "Shape.h"
#import "Shape+Render.h"
#import "ShapeNames.h"
#define MAX_LABEL_LENGTH 10
#define LABEL_PADDING_X 2
#define LABEL_PADDING_Y 2
@implementation Node (Render)
- (Shape*) shapeToRender {
if (style) {
return [Shape shapeForName:[style shapeName]];
} else {
return [Shape shapeForName:SHAPE_CIRCLE];
}
}
- (Transformer*) shapeTransformerForSurface:(id<Surface>)surface {
return [self shapeTransformerFromTransformer:[surface transformer]];
}
- (NSRect) renderBoundsUsingShapeTransform:(Transformer*)shapeTrans {
float strokeThickness = style ? [style strokeThickness] : [NodeStyle defaultStrokeThickness];
NSRect screenBounds = [shapeTrans rectToScreen:[[self shapeToRender] boundingRect]];
screenBounds = NSInsetRect(screenBounds, -strokeThickness, -strokeThickness);
return screenBounds;
}
- (NSRect) renderBoundsForSurface:(id<Surface>)surface {
return [self renderBoundsUsingShapeTransform:[self shapeTransformerForSurface:surface]];
}
- (NSRect) renderBoundsWithLabelForSurface:(id<Surface>)surface {
NSRect nodeBounds = [self renderBoundsForSurface:surface];
NSRect labelRect = NSZeroRect;
if (![label isEqual:@""]) {
id<RenderContext> cr = [surface createRenderContext];
labelRect.size = [self renderedLabelSizeInContext:cr];
NSPoint nodePos = [[surface transformer] toScreen:point];
labelRect.origin.x = nodePos.x - (labelRect.size.width / 2);
labelRect.origin.y = nodePos.y - (labelRect.size.height / 2);
}
return NSUnionRect(nodeBounds, labelRect);
}
- (RColor) strokeColor {
if (style) {
return [[style strokeColorRGB] rColor];
} else {
return MakeRColor (0.4, 0.4, 0.7, 0.8);
}
}
- (RColor) fillColor {
if (style) {
return [[style fillColorRGB] rColor];
} else {
return MakeRColor (0.4, 0.4, 0.7, 0.3);
}
}
- (NSString*) renderedLabel {
NSString *r_label = [label stringByExpandingLatexConstants];
if ([r_label length] > MAX_LABEL_LENGTH) {
r_label = [[[r_label substringToIndex:MAX_LABEL_LENGTH-1] stringByTrimmingSpaces] stringByAppendingString:@"..."];
} else {
r_label = [r_label stringByTrimmingSpaces];
}
return r_label;
}
- (NSSize) renderedLabelSizeInContext:(id<RenderContext>)context {
NSSize result = {0, 0};
if (![label isEqual:@""]) {
NSString *r_label = [self renderedLabel];
id<TextLayout> layout = [context layoutText:r_label withSize:9];
result = [layout size];
result.width += LABEL_PADDING_X;
result.height += LABEL_PADDING_Y;
}
return result;
}
- (void) renderLabelToSurface:(id <Surface>)surface withContext:(id<RenderContext>)context {
[self renderLabelAt:[[surface transformer] toScreen:point] withContext:context];
}
- (void) renderLabelAt:(NSPoint)p withContext:(id<RenderContext>)context {
// draw latex code overlayed on node
if (![label isEqual:@""]) {
[context saveState];
NSString *r_label = [self renderedLabel];
id<TextLayout> layout = [context layoutText:r_label withSize:9];
NSSize labelSize = [layout size];
NSRect textBounds = NSMakeRect (p.x - labelSize.width/2,
p.y - labelSize.height/2,
labelSize.width,
labelSize.height);
NSRect backRect = NSInsetRect (textBounds, -LABEL_PADDING_X, -LABEL_PADDING_Y);
[context startPath];
[context setLineWidth:1.0];
[context rect:backRect];
RColor fColor = MakeRColor (1.0, 1.0, 0.5, 0.7);
RColor sColor = MakeRColor (0.5, 0.0, 0.0, 0.7);
[context strokePathWithColor:sColor andFillWithColor:fColor];
[layout showTextAt:textBounds.origin withColor:BlackRColor];
[context restoreState];
}
}
- (void) renderToSurface:(id <Surface>)surface withContext:(id<RenderContext>)context state:(enum NodeState)state {
Transformer *shapeTrans = [self shapeTransformerForSurface:surface];
float strokeThickness = style ? [style strokeThickness] : [NodeStyle defaultStrokeThickness];
[context saveState];
[[self shapeToRender] drawPathWithTransform:shapeTrans andContext:context];
[context setLineWidth:strokeThickness];
if (!style) {
[context setLineDash:3.0];
}
[context strokePathWithColor:[self strokeColor] andFillWithColor:[self fillColor]];
if (state != NodeNormal) {
[context setLineWidth:strokeThickness + 4.0];
[context setLineDash:0.0];
float alpha = 0.0f;
if (state == NodeSelected)
alpha = 0.5f;
else if (state == NodeHighlighted)
alpha = 0.25f;
RColor selectionColor = MakeSolidRColor(0.61f, 0.735f, 1.0f);
[[self shapeToRender] drawPathWithTransform:shapeTrans andContext:context];
[context strokePathWithColor:selectionColor andFillWithColor:selectionColor usingAlpha:alpha];
}
[context restoreState];
[self renderLabelToSurface:surface withContext:context];
}
- (BOOL) hitByPoint:(NSPoint)p onSurface:(id<Surface>)surface {
Transformer *shapeTrans = [self shapeTransformerForSurface:surface];
NSRect screenBounds = [self renderBoundsUsingShapeTransform:shapeTrans];
if (!NSPointInRect(p, screenBounds)) {
return NO;
}
float strokeThickness = style ? [style strokeThickness] : [NodeStyle defaultStrokeThickness];
id<RenderContext> ctx = [surface createRenderContext];
[ctx setLineWidth:strokeThickness];
[[self shapeToRender] drawPathWithTransform:shapeTrans andContext:ctx];
return [ctx strokeIncludesPoint:p] || [ctx fillIncludesPoint:p];
}
@end
// vim:ft=objc:ts=8:et:sts=4:sw=4
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