/*

     File: ATColorTableController.m

 Abstract: A controller used by the ATImageTextCell to edit the color property. It is implemented in an abstract enough way to be used by a class other than the cell. 

  Version: 1.1

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#import "ATColorTableController.h"

#import "ATPopupWindow.h"

@implementation ATColorTableController

+ (ATColorTableController *)sharedColorTableController {

    static ATColorTableController *gSharedColorTableController = nil;

    if (gSharedColorTableController == nil) {

        gSharedColorTableController = [[[self class] alloc] initWithNibName:@"ColorTable" bundle:[NSBundle bundleForClass:[self class]]];

    }

    return gSharedColorTableController;

}

@synthesize delegate = _delegate;

@dynamic selectedColor, selectedColorName;

- (void)dealloc {

    [_colorList release];

    [_colorNames release];

    [_window release];

    [super dealloc];

}

- (void)loadView {

    [super loadView];

    _colorList = [[NSColorList colorListNamed:@"Crayons"] retain];

    _colorNames = [[_colorList allKeys] retain];

    [_tableColorList setIntercellSpacing:NSMakeSize(3, 3)];

    [_tableColorList setTarget:self];

    [_tableColorList setAction:@selector(_tableViewAction:)];

}

- (NSColor *)selectedColor {

    NSString *name = [self selectedColorName];

    if (name != nil) {

        return [_colorList colorWithKey:name];

    } else {

        return nil;

    }

}

- (NSString *)selectedColorName {

    if ([_tableColorList selectedRow] != -1) {

        return [_colorNames objectAtIndex:[_tableColorList selectedRow]];

    } else {

        return nil;

    }

}

- (void)_selectColor:(NSColor *)color {

    // Search for that color in our list

    NSInteger row = 0;

    for (NSString *name in _colorNames) {

        NSColor *colorInList = [_colorList colorWithKey:name];

        if ([color isEqual:colorInList]) {

            break;

        }

        row++;

    }    

    _updatingSelection = YES;

    if (row != -1) {

        [_tableColorList scrollRowToVisible:row];

        [_tableColorList selectRowIndexes:[NSIndexSet indexSetWithIndex:row] byExtendingSelection:NO];

    } else {

        [_tableColorList scrollRowToVisible:0];

        [_tableColorList selectRowIndexes:[NSIndexSet indexSet] byExtendingSelection:NO];

    }

    _updatingSelection = NO;

}

- (void)_createWindowIfNeeded {

    if (_window == nil) {

        NSRect viewFrame = self.view.frame;

        // Create and setup our window

        _window = [[ATPopupWindow alloc] initWithContentRect:viewFrame styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO];

        [_window setReleasedWhenClosed:NO];

        [_window setLevel:NSPopUpMenuWindowLevel];

        [_window setHasShadow:YES];        

        [[_window contentView] addSubview:self.view];

        [_window makeFirstResponder:_tableColorList];

        // Make the window have a clear color and be non-opaque for our pop-up animation

        [_window setBackgroundColor:[NSColor clearColor]];

        [_window setOpaque:NO];

    }

}

- (void)_windowClosed:(NSNotification *)note {

    if (_eventMonitor) {

        [NSEvent removeMonitor:_eventMonitor];

        _eventMonitor = nil;

    }

    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSWindowWillCloseNotification object:_window];

    [[NSNotificationCenter defaultCenter] removeObserver:self name:NSApplicationDidResignActiveNotification object:nil];

}

- (void)_closeAndSendAction:(BOOL)sendAction {

    [_window close];

    if (sendAction) {

        if ([self.delegate respondsToSelector:@selector(colorTableController:didChooseColor:named:)]) {

            [self.delegate colorTableController:self didChooseColor:self.selectedColor named:self.selectedColorName];

        }

    } else {

        if ([self.delegate respondsToSelector:@selector(didCancelColorTableController:)]) {

            [self.delegate didCancelColorTableController:self];

        }

    }

}

- (void)_windowShouldClose:(NSNotification *)note {

    [self _closeAndSendAction:NO];

}

- (void)editColor:(NSColor *)color locatedAtScreenRect:(NSRect)rect {

    [self _createWindowIfNeeded];

    [self _selectColor:color];

    NSPoint origin = rect.origin;

    NSRect windowFrame = [_window frame];

    // The origin is the lower left; subtract the window's height

    origin.y -= NSHeight(windowFrame);

    // Center the popup window under the rect

    origin.y += floor(NSHeight(rect) / 3.0);

    origin.x -= floor(NSWidth(windowFrame) / 2.0);

    origin.x += floor(NSWidth(rect) / 2.0);

    [_window setFrameOrigin:origin];

    [_window popup];

    // Add some watches on the window and application

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_windowClosed:) name:NSWindowWillCloseNotification object:_window];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(_windowShouldClose:) name:NSApplicationDidResignActiveNotification object:nil];

    // Start watching events to figure out when to close the window

    NSAssert(_eventMonitor == nil, @"_eventMonitor should not be created yet");

    _eventMonitor = [NSEvent addLocalMonitorForEventsMatchingMask:NSLeftMouseDownMask | NSRightMouseDownMask | NSOtherMouseDownMask | NSKeyDownMask handler:^(NSEvent *incomingEvent) {

        NSEvent *result = incomingEvent;

        NSWindow *targetWindowForEvent = [incomingEvent window];

        if (targetWindowForEvent != _window) {

            [self _closeAndSendAction:NO];

        } else if ([incomingEvent type] == NSKeyDown) {

            if ([incomingEvent keyCode] == 53) {

                // Escape

                [self _closeAndSendAction:NO];

                result = nil; // Don't process the event

            } else if ([incomingEvent keyCode] == 36) {

                // Enter

                [self _closeAndSendAction:YES];

                result = nil;

            }

        }

        return result;

    }];

}

- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {

    return _colorNames.count;

}

- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {

    return [_colorNames objectAtIndex:row];

}

- (void)tableView:(NSTableView *)tableView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {

    NSColor *color = [_colorList colorWithKey:[_colorNames objectAtIndex:row]];

    [cell setColor:color];

}

- (void)_tableViewAction:(id)sender {

    [self _closeAndSendAction:YES];

}

@end