[SysStatus app] 模拟monitorplus状态栏

首先看效果：

下面是所用到的颜色:

分析：

代码

因为是demo，所以很多地方的代码组织不完善。

//
//  StatusItemView.h
//  SysStatus
//
//  Created by xiaozi on 14-2-23.
//  Copyright (c) 2014年 xiaozi. All rights reserved.
//

#import <Cocoa/Cocoa.h>
#import "ProgressView.h"

@interface StatusItemView : NSControl <NSMenuDelegate> {
    NSStatusItem *_statusItem;
    BOOL _isHighlighted;
    NSDictionary *_data;
    SEL _action;
    id __unsafe_unretained _target;
    ProgressView *_cpuView;
    ProgressView *_memView;
}

@property (nonatomic, readonly) NSStatusItem *statusItem;
@property (nonatomic, setter = setHighlighted:) BOOL isHighlighted;
@property (nonatomic) NSDictionary *data;
@property (nonatomic) SEL action;
@property (nonatomic, unsafe_unretained) id target;

- (id) initWithStatusItem: (NSStatusItem *)statusItem;

@end

//
//  StatusItemView.m
//  SysStatus
//
//  Created by xiaozi on 14-2-23.
//  Copyright (c) 2014年 xiaozi. All rights reserved.
//

#import "StatusItemView.h"
#import "ProgressView.h"

@implementation StatusItemView

- (id) initWithStatusItem: (NSStatusItem *)statusItem
{
    self = [super init];
    if (self) {
        // Initialization code here.
        _statusItem = statusItem;
        _cpuView = [[ProgressView alloc] initWithFrame: NSMakeRect(0, 10, 82, 11)];
        [_cpuView setBarColor:[NSColor colorWithCalibratedRed:0.91 green:0.3 blue:0.24 alpha:1]];
        [_cpuView setData:[NSDictionary dictionaryWithObjectsAndKeys:@"CPU %3d%%", @"label", [NSNumber numberWithInt: 0], @"value", nil]];
        _memView = [[ProgressView alloc] initWithFrame: NSMakeRect(0, 1, 82, 11)];
        [_memView setBarColor:[NSColor colorWithCalibratedRed:0.29 green:0.64 blue:0.87 alpha:1]];
        [_memView setData:[NSDictionary dictionaryWithObjectsAndKeys:@"MEM %3d%%", @"label", [NSNumber numberWithInt: 0], @"value", nil]];
        [self addSubview:_cpuView];
        [self addSubview:_memView];
    }
    return self;
}

- (void) setData: (NSDictionary *)data
{
    [_cpuView setData:[NSDictionary dictionaryWithObjectsAndKeys:@"CPU %3d%%", @"label", [data objectForKey: @"cpu"], @"value", nil]];
    [_memView setData:[NSDictionary dictionaryWithObjectsAndKeys:@"MEM %3d%%", @"label", [data objectForKey: @"mem"], @"value", nil]];
}

- (void) setHighlighted: (BOOL) highlighted
{
    if (_isHighlighted == highlighted) return;
    _isHighlighted = highlighted;
    [_cpuView setHighlighted: highlighted];
    [_memView setHighlighted: highlighted];
    [self setNeedsDisplay: YES];
}

- (void) setMenu:(NSMenu *)menu
{
    [menu setDelegate: self];
    [super setMenu: menu];
}

- (void)mouseDown:(NSEvent *)theEvent
{
    [_statusItem popUpStatusItemMenu: [super menu]];
    [NSApp sendAction:_action to:_target from:self];
}

- (void)menuWillOpen:(NSMenu *)menu {
    [self setHighlighted:YES];
    [self setNeedsDisplay:YES];
}

- (void)menuDidClose:(NSMenu *)menu {
    [self setHighlighted:NO];
    [self setNeedsDisplay:YES];
}

- (void)drawRect:(NSRect)dirtyRect
{
    [_statusItem drawStatusBarBackgroundInRect:dirtyRect withHighlight: _isHighlighted];

}

@end

//
//  ProgressView.m
//  SysStatus
//
//  Created by xiaozi on 14-2-24.
//  Copyright (c) 2014年 xiaozi. All rights reserved.
//

#import "ProgressView.h"

@implementation ProgressView

- (id)initWithFrame:(NSRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code here.
        _data = [NSDictionary dictionaryWithObjectsAndKeys:@"LAB %3d%%", @"label", [NSNumber numberWithInt: 50], @"value", nil];
        _barColor = [NSColor colorWithCalibratedRed:0.91 green:0.3 blue:0.24 alpha:1];
    }
    return self;
}

- (void) setHighlighted:(BOOL)highlighted
{
    if (_highlighted == highlighted) return;
    _highlighted = highlighted;
    [self setNeedsDisplay: YES];
}

-(void) setData:(NSDictionary *)data
{
    _data = data;
    [self setNeedsDisplay: YES];
}

- (void)drawRect:(NSRect)dirtyRect
{
    NSColor *fontColor,*barBorderColor,*barIndicatorColor,*barBgColor;
    if (_highlighted) {
        fontColor = [NSColor whiteColor];
        barBorderColor = [NSColor whiteColor];
        barIndicatorColor = [NSColor whiteColor];
        barBgColor = [NSColor clearColor];
    } else {
        fontColor = [NSColor blackColor];
        barBorderColor = [NSColor colorWithCalibratedRed:0.17 green:0.24 blue:0.3 alpha:1];
        barIndicatorColor = _barColor;
        barBgColor = [NSColor colorWithCalibratedRed:0.95 green:0.96 blue:0.96 alpha:1];
    }
    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:[NSFont fontWithName:@"Menlo" size: 8], NSFontAttributeName, fontColor, NSForegroundColorAttributeName, nil];
    NSAttributedString * text=[[NSAttributedString alloc] initWithString:[NSString stringWithFormat: [_data valueForKey:@"label"], [[_data objectForKey: @"value"] integerValue]] attributes: attributes];
    [text drawAtPoint:NSMakePoint(6, 1)];
    
    NSRect bar = NSMakeRect(50.0f, 3, 27.0f, 6.0f);
    bar = NSInsetRect(bar, .5f, .5f);
    NSBezierPath *barView = [NSBezierPath bezierPathWithRect: bar];
    [barBgColor set];
    [barView fill];
    [barBorderColor set];
    [barView stroke];
    NSRect barIndicator = NSMakeRect(50.0f, 3, roundf(.27f * [[_data objectForKey: @"value"] integerValue]), 6.0f);
    barIndicator = NSInsetRect(barIndicator, 1, 1);
    [barIndicatorColor set];
    [NSBezierPath fillRect:barIndicator];
}

@end

使用方法

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // Insert code here to initialize your application
    NSStatusItem *statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:82];
    statusItemView = [[StatusItemView alloc] initWithStatusItem: statusItem];
    [statusItem setHighlightMode: YES];
    [statusItem setView: statusItemView];
    [statusItemView setMenu: _statusMenu];
    
    [NSTimer scheduledTimerWithTimeInterval:2
                                      target:self
                                    selector:@selector(updateInfo:)
                                    userInfo:nil
                                     repeats:YES];
}

- (void)updateInfo:(NSTimer *)timer
{
    int cpuUsage = (arc4random() % 20) + 2;
    int memUsage = (arc4random() % 10) + 50;
//    NSLog(@"%d, %d", cpuUsage, memUsage);
    NSDictionary *data = [NSDictionary dictionaryWithObjectsAndKeys:[NSNumber numberWithInt: cpuUsage], @"cpu", [NSNumber numberWithInt: memUsage], @"mem", nil];
    [statusItemView setData: data];
}