source: trunk/Cocoa/Pester/Source/PSVolumeController.m@ 639

//
//  PSVolumeController.m
//  Pester
//
//  Created by Nicholas Riley on Tue Apr 08 2003.
//  Copyright (c) 2003 Nicholas Riley. All rights reserved.
//

#import "PSVolumeController.h"
#import "NJRSoundManager.h"
#import "NJRNonCenteringWindow.h"
#include <Carbon/Carbon.h>

@interface NSMenu (SnowLeopardAdditions)
- (BOOL)popUpMenuPositioningItem:(NSMenuItem *)item atLocation:(NSPoint)location inView:(NSView *)view;
- (void)setAllowsContextMenuPlugIns:(BOOL)allows;
- (void)cancelTracking;
@end

@interface NSMenuItem (SnowLeopardAdditions)
- (void)setView:(NSView *)view;
@end

@implementation PSVolumeController

+ (PSVolumeController *)controllerWithVolume:(float)volume delegate:(id)aDelegate;
{
    return [[self alloc] initWithVolume: volume delegate: aDelegate];
}

- (id)initWithVolume:(float)volume delegate:(id)aDelegate;
{
    if ( (self = [self initWithWindowNibName: @"Volume"]) != nil) {
        [self window]; // connect outlets

        if ([NJRSoundManager volumeIsNotMutedOrInvalid: volume])
            [volumeSlider setFloatValue: volume];

        delegate = [aDelegate retain];

        NSView *view = [aDelegate volumeControllerLaunchingView: self];

        // In 10.6, we can no longer force the modal session to work by "seeding" the slider with a mouse-down event.
        // Instead, use a menu.  (This should mostly work on 10.5 too, but is currently untested.)
        if ([NSMenu instancesRespondToSelector: @selector(popUpMenuPositioningItem:atLocation:inView:)]) {
            menu = [[NSMenu alloc] initWithTitle: @""];
            NSMenuItem *menuItem = [[NSMenuItem alloc] init];
            [menuItem setView: contentView];
            [menu addItem: menuItem];
            [menuItem release];
            NSPoint point;
            if (view != nil) {
                NSSize size = [view bounds].size;
                point = [view isFlipped] ? NSMakePoint(0, size.height) : NSZeroPoint;
            } else {
                point = [NSEvent mouseLocation];
            }
            [menu setAllowsContextMenuPlugIns: NO];
            // replace with http://waffle.wootest.net/2007/08/07/popping-up-a-menu-in-cocoa/
            [menu popUpMenuPositioningItem: nil atLocation: point inView: view];
            [menu release];
        } else {
            NSWindow *window = [[NJRNonCenteringWindow alloc] initWithContentRect: [contentView bounds] styleMask: NSBorderlessWindowMask backing: NSBackingStoreBuffered defer: NO];
            [window setContentView: contentView];
            [window setOpaque: NO];
            [window setBackgroundColor: [NSColor colorWithCalibratedWhite: 0.81f alpha: 0.9f]];
            [window setHasShadow: YES];
            [window setOneShot: YES];
            [window setDelegate: self];

            if (view != nil) {
                NSRect rect = [view convertRect: [view bounds] toView: nil];
                NSWindow *parentWindow = [view window];
                rect.origin = [parentWindow convertBaseToScreen: rect.origin];
                rect.origin.x -= [window frame].size.width - rect.size.width + 1;
                [window setFrameTopLeftPoint: rect.origin];
                NSRect visibleFrame = [[parentWindow screen] visibleFrame];
                if (!NSContainsRect(visibleFrame, [window frame])) {
                    NSPoint viewTopLeft = { rect.origin.x, rect.origin.y + rect.size.height };
                    [window setFrameOrigin: viewTopLeft];
                }
            }
            // -[NSApplication beginModalSessionForWindow:] shows and centers the window; we use NJRNonCenteringWindow to prevent the repositioning from succeeding
            NSModalSession session = [NSApp beginModalSessionForWindow: window];
            [volumeSlider mouseDown: [NSApp currentEvent]];
            [NSApp runModalSession: session];
            [NSApp endModalSession: session];
            [window close];
        }

        [self autorelease];
    }
    return self;
}

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

- (IBAction)volumeSet:(NSSlider *)sender;
{
    // XXX don't delay preview for keyboard adjustment
    [delegate volumeController: self didSetVolume: [sender floatValue]];
    NSLog(@"%@", [NSApp currentEvent]);
    unsigned eventMask = NSEventMaskFromType([[NSApp currentEvent] type]);
    // The event may simply be a mouse-up: close the menu.
    if (eventMask & (NSLeftMouseUpMask | NSRightMouseDownMask | NSOtherMouseDownMask))
        [menu cancelTracking];
    // On a quick click, the event may be a mouse down but the mouse button is no longer down.
    if (!(eventMask & (NSLeftMouseDownMask | NSRightMouseDownMask | NSOtherMouseDownMask)))
        return;
    // 10.6+: use [NSEvent pressedMouseButtons] instead
    if (GetCurrentButtonState() == 0)
        [menu cancelTracking];
}

@end