trunk/Classes/StripChartRulerView.m

//
//  StripChartRulerView.m
//  Created by Toshi Nagata on Sun Jan 26 2003.
//
/*
    Copyright (c) 2003-2016 Toshi Nagata. All rights reserved.

 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 version 2 of the License.
 
 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.
 */

#import "StripChartRulerView.h"
#import "StripChartView.h"
#import "MDHeaders.h"

@implementation StripChartRulerView

- (id)initWithFrame:(NSRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
     }
    return self;
}

- (void)dealloc
{
        [super dealloc];
}

- (void)drawRect:(NSRect)aRect
{
        NSRect frame, bounds, visibleRect;
        NSFont *font;
        NSDictionary *attr;
        float grid;
    float minValue, maxValue;
//    float visibleMinValue, visibleMaxValue, visibleRange, aRange;
//    int i;
//    int min, max;
        float ascender, descender, x, y, yval;
        NSString *str;
        frame = [self frame];
        bounds = [self bounds];
        visibleRect = [(NSClipView *)[self superview] documentVisibleRect];
        x = frame.size.width - 0.5f;
        [NSBezierPath strokeLineFromPoint: NSMakePoint(x, 0) toPoint: NSMakePoint(x, bounds.size.height)];
        minValue = [(StripChartView *)[self clientView] minValue];
        maxValue = [(StripChartView *)[self clientView] maxValue];
        grid = [(StripChartView *)[self clientView] horizontalGridInterval];
        font = [[self class] rulerLabelFont];
        ascender = [font ascender];
        descender = [font descender];
        attr = [NSDictionary dictionaryWithObjectsAndKeys: font, NSFontAttributeName, nil];
        for (yval = minValue; yval <= maxValue + 1.01; yval += grid) {
                y = (float)floor(yval * bounds.size.height / (maxValue - minValue));
                x = frame.size.width - 4.0f;
                if (y > 0.0f && y < bounds.size.height)
                        [NSBezierPath strokeLineFromPoint: NSMakePoint(x, y + 0.5f) toPoint: NSMakePoint(x + 4.0f, y + 0.5f)];
                y -= (float)floor((ascender - descender) / 2);
                if (y > aRect.origin.y + aRect.size.height + 1
                || y < aRect.origin.y - (ascender - descender) - 1)
                        continue;
                if (y > bounds.size.height - (ascender - descender))
                        y = bounds.size.height - (ascender - descender);
                if (y < 0)
                        y = 0;
                str = [NSString stringWithFormat: @"%g", (yval >= maxValue - 0.01 ? maxValue : yval)];
//              x = frame.size.width - 4.0f - [font widthOfString: str];
        x = frame.size.width - 4.0f - [str sizeWithAttributes:[NSDictionary dictionaryWithObject:font forKey:NSFontAttributeName]].width;
                [str drawAtPoint: NSMakePoint(x, y) withAttributes: attr];
        }
        [super drawRect:aRect];
}

@end