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// UKPaintEraserTool.m
// UKPaintView
// Created by Uli Kusterer on Fri Oct 31 2003.
// Copyright (c) 2003 M. Uli Kusterer. All rights reserved.
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
// 3. This notice may not be removed or altered from any source
// distribution.
#import "ULIPaintEraserTool.h"
#import "ULIPaintView.h"
#import "NSCursor+Box.h"
#import "UlisBresenham.h"
void UKPaintEraserBresenhamPixelProc( float x, float y, void* data );
@implementation ULIPaintEraserTool
void UKPaintEraserBresenhamPixelProc( float x, float y, void* data )
ULIPaintEraserTool* tool = (ULIPaintEraserTool*) data;
NSSize lineSize = [[tool owner] lineSize];
NSRect box;
box.origin.x = x -truncf(lineSize.width / 2);
box.origin.y = y -truncf(lineSize.height / 2);
box.size = lineSize;
NSRectFill( box );
/* Draw a brush during tracking:
The drawings you do in here will end up in the actual image buffer. */
-(void) drawTrackingToolShapeFrom: (NSPoint*)lastPos to: (NSPoint)currPos
// Draw a brush line using the owning paint view's line color:
[NSBezierPath setDefaultLineWidth: 0];
[[NSColor clearColor] set];
DrawBresenhamLine( lastPos->x, lastPos->y, currPos.x, currPos.y,
UKPaintEraserBresenhamPixelProc, self );
[owner setNeedsDisplayInRect: [self rectWithLineSizeFrom: *lastPos to: currPos]]; // Cause redraw so user sees what we did.
*lastPos = currPos; // Make sure we continue drawing at end of this line segment.
// Return the name of an image to use as the icon for this tool in the tool palette.
-(NSString*) toolIconName
return @"UKPaintEraserTool";
-(NSCursor*) drawingCursor
return [NSCursor boxCursorOfSize: [owner lineSize]];
-(BOOL) isSaveableTool
return NO;