Scroll-Reverser/StatusItemController.m at master · dawncold/Scroll-Reverser · GitHub

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#import "StatusItemController.h"
#import "AppDelegate.h"
#import "NSObject+ObservePrefs.h"

@implementation StatusItemController

+ (NSSize)statusImageSize
{
    return NSMakeSize(14, 17);
}

+ (NSImage *)statusImageWithColor:(NSColor *)color
{
    NSImage *const templateImage=[NSImage imageNamed:@"ScrollReverserStatusIcon"];

    // create blank image to draw into
    NSImage *const statusImage=[[NSImage alloc] init];
    [statusImage setSize:[self statusImageSize]];
    [statusImage lockFocus];

    // draw base black image
    const NSRect dstRect=NSMakeRect(0, 0, [self statusImageSize].width, [self statusImageSize].height);
    [templateImage drawInRect:dstRect
                     fromRect:NSZeroRect
                    operation:NSCompositeSourceOver
                     fraction:1.0];

    // fill with color
    [color set];
    NSRectFillUsingOperation(dstRect, NSCompositeSourceIn);

    // finished drawing
    [statusImage unlockFocus];
    return statusImage;
}

- (void)updateItems
{
	if ([_statusItem respondsToSelector:@selector(button)]) {
        [_statusItem button].appearsDisabled=![[NSUserDefaults standardUserDefaults] boolForKey:PrefsReverseScrolling];
	}
	else {
        if ([[NSUserDefaults standardUserDefaults] boolForKey:PrefsReverseScrolling]) {
            if (_menuIsOpen) {
                [_statusItem setImage:[StatusItemController statusImageWithColor:[NSColor whiteColor]]];
            }
            else {
                [_statusItem setImage:[StatusItemController statusImageWithColor:[NSColor blackColor]]];
            }
        }
        else {
            [_statusItem setImage:[StatusItemController statusImageWithColor:[NSColor grayColor]]];
        }
	}
}

- (void)addStatusIcon
{
	if (!_statusItem) {
		_statusItem = [[NSStatusBar systemStatusBar] statusItemWithLength:NSVariableStatusItemLength];
        [_statusItem setHighlightMode:YES];
        [_statusItem setTarget:self];
        [_statusItem setAction:@selector(statusButtonClicked:)];
        [_statusItem sendActionOn:NSLeftMouseDownMask|NSRightMouseDownMask];

        if ([_statusItem respondsToSelector:@selector(button)]) {
			// on yosemite, set up the template image here
            NSImage *const statusImage=[StatusItemController statusImageWithColor:[NSColor blackColor]];
            [statusImage setTemplate:YES];
            [_statusItem setImage:statusImage];
        }

		[self updateItems];
	}
}

- (void)removeStatusIcon
{
	if (_statusItem) {
		[[NSStatusBar systemStatusBar] removeStatusItem:_statusItem];
		_statusItem=nil;
	}
}

- (void)displayStatusIcon
{
	if ([[NSUserDefaults standardUserDefaults] boolForKey:PrefsHideIcon]) {
		[self removeStatusIcon];
	}
	else {
		[self addStatusIcon];
	}
}

- (id)init
{
	self = [super init];

	[self observePrefsKey:PrefsReverseScrolling];
	[self observePrefsKey:PrefsHideIcon];
	[self displayStatusIcon];

	return self;
}

- (void)menuWillOpen:(NSMenu *)menu
{
	_menuIsOpen=YES;
	[self updateItems];
}

- (void)menuDidClose:(NSMenu *)menu
{
	_menuIsOpen=NO;
	[self updateItems];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
	[self displayStatusIcon];
	[self updateItems];
}

- (void)attachMenu:(NSMenu *)menu
{
    _theMenu=menu;
    [_theMenu setDelegate:self];
}

- (void)openMenu
{
    if (_theMenu) {
        [_statusItem popUpStatusItemMenu:_theMenu];
    }
}

- (void)statusButtonClicked:(id)sender
{
    if ((([[NSApp currentEvent] modifierFlags] & NSControlKeyMask)==NSControlKeyMask) || [[NSApp currentEvent] type] == NSRightMouseDown)
    {
        [(AppDelegate *)[NSApp delegate] statusItemRightClicked];
    }
    else if (([[NSApp currentEvent] modifierFlags] & NSAlternateKeyMask)==NSAlternateKeyMask) {
        [(AppDelegate *)[NSApp delegate] statusItemAltClicked];
    }
    else {
        [(AppDelegate *)[NSApp delegate] statusItemClicked];
        [self openMenu];
    }
}

@end